Extracting prog: 37.477671784s
Minimizing prog: 24m4.43660656s
Simplifying prog options: 0s
Extracting C: 57.759652165s
Simplifying C: 25m15.898503862s


extracting reproducer from 59 programs
first checking the prog from the crash report
single: executing 1 programs separately with timeout 30s
testing program (duration=30s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-mmap$auto-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
mmap$auto(0x0, 0x20009, 0xdf, 0xeb1, 0x401, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
single: successfully extracted reproducer
found reproducer with 11 syscalls
minimizing guilty program
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-mmap$auto-io_uring_setup$auto-openat$auto_iommufd_fops_main
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
mmap$auto(0x0, 0x20009, 0xdf, 0xeb1, 0x401, 0x0)
io_uring_setup$auto(0x6, 0x0)
openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-mmap$auto-io_uring_setup$auto-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
mmap$auto(0x0, 0x20009, 0xdf, 0xeb1, 0x401, 0x0)
io_uring_setup$auto(0x6, 0x0)
ioctl$auto(0xffffffffffffffff, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-mmap$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
mmap$auto(0x0, 0x20009, 0xdf, 0xeb1, 0x401, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
io_uring_setup$auto(0x6, 0x0)
r0 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r0, 0x3b8e, 0xffffffffffffffff) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, 0x0, 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, 0x0, 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, 0x0, 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
testing program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, 0x0, 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program did not crash
extracting C reproducer
testing compiled C program (duration=45.2867035s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
simplifying C reproducer
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:false RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program did not crash
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:1 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program did not crash
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program did not crash
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program did not crash
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:true UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing compiled C program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
testing program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
validation run: crashed=true
testing program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
validation run: crashed=true
testing program (duration=45.2867035s, {Threaded:false Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:false NetDevices:true NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): close_range$auto-mmap$auto-io_uring_setup$auto-openat$auto_kernfs_file_fops_kernfs_internal-socket$nl_generic-openat$auto_proc_pid_set_comm_operations_base-openat$auto_nsim_pp_hold_fops_netdev-io_uring_setup$auto-openat$auto_iommufd_fops_main-ioctl$auto
detailed listing:
executing program 0:
close_range$auto(0x0, 0xfffffffffffff000, 0x2)
mmap$auto(0x0, 0x2020009, 0x3, 0xeb1, 0xfffffffffffffffa, 0x8000)
io_uring_setup$auto(0x6, 0x0)
openat$auto_kernfs_file_fops_kernfs_internal(0xffffffffffffff9c, &(0x7f0000000080)='/sys/devices/LNXSYSTM:00/LNXSYBUS:00/PNP0A03:00/device:08/adr\x00', 0x0, 0x0)
socket$nl_generic(0x10, 0x3, 0x10)
openat$auto_proc_pid_set_comm_operations_base(0xffffffffffffff9c, &(0x7f0000000100)='/proc/thread-self/comm\x00', 0x800, 0x0)
r0 = openat$auto_nsim_pp_hold_fops_netdev(0xffffffffffffff9c, &(0x7f0000000040)='/sys/kernel/debug/netdevsim/netdevsim1/ports/3/pp_hold\x00', 0x101001, 0x0)
io_uring_setup$auto(0x6, 0x0)
r1 = openat$auto_iommufd_fops_main(0xffffffffffffff9c, &(0x7f0000000400), 0x80001, 0x0)
ioctl$auto(r1, 0x3b8e, r0) (fail_nth: 9)

program crashed: KASAN: slab-use-after-free Write in iommufd_eventq_fops_release
validation run: crashed=true
reproducing took 56m13.818835399s
repro crashed as (corrupted=false):
RAX: ffffffffffffffda RBX: 00007f68a29d5fa0 RCX: 00007f68a278eba9
RDX: 0000000000000004 RSI: 0000000000003b8e RDI: 0000000000000006
RBP: 00007ffdabc3ceb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f68a29d5fa0 R14: 00007f68a29d5fa0 R15: 0000000000000003
 </TASK>
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline]
BUG: KASAN: slab-use-after-free in __refcount_dec include/linux/refcount.h:455 [inline]
BUG: KASAN: slab-use-after-free in refcount_dec include/linux/refcount.h:476 [inline]
BUG: KASAN: slab-use-after-free in iommufd_eventq_fops_release+0x45/0xc0 drivers/iommu/iommufd/eventq.c:376
Write of size 4 at addr ffff88805c0b8404 by task syz.0.27/6095

CPU: 0 UID: 0 PID: 6095 Comm: syz.0.27 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline]
 __refcount_dec include/linux/refcount.h:455 [inline]
 refcount_dec include/linux/refcount.h:476 [inline]
 iommufd_eventq_fops_release+0x45/0xc0 drivers/iommu/iommufd/eventq.c:376
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x14d/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x41c/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68a278eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdabc3ce58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff2 RBX: 00007f68a29d5fa0 RCX: 00007f68a278eba9
RDX: 0000000000000004 RSI: 0000000000003b8e RDI: 0000000000000006
RBP: 00007ffdabc3ceb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f68a29d5fa0 R14: 00007f68a29d5fa0 R15: 0000000000000003
 </TASK>

Allocated by task 6095:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:405
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4376 [inline]
 __kmalloc_noprof+0x223/0x510 mm/slub.c:4388
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 _iommufd_object_alloc+0x23/0x1a0 drivers/iommu/iommufd/main.c:40
 _iommufd_object_alloc_ucmd+0xb2/0x160 drivers/iommu/iommufd/main.c:84
 iommufd_fault_alloc+0x93/0x420 drivers/iommu/iommufd/eventq.c:430
 iommufd_fops_ioctl+0x34d/0x540 drivers/iommu/iommufd/main.c:508
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6095:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2422 [inline]
 slab_free mm/slub.c:4695 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4894
 iommufd_object_abort+0x10c/0x170 drivers/iommu/iommufd/main.c:124
 iommufd_fops_ioctl+0x381/0x540 drivers/iommu/iommufd/main.c:512
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88805c0b8400
 which belongs to the cache kmalloc-cg-512 of size 512
The buggy address is located 4 bytes inside of
 freed 512-byte region [ffff88805c0b8400, ffff88805c0b8600)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5c0b8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888032e23601
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b84b140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 00000000f5000000 ffff888032e23601
head: 00fff00000000040 ffff88801b84b140 dead000000000122 0000000000000000
head: 0000000000000000 0000000080100010 00000000f5000000 ffff888032e23601
head: 00fff00000000002 ffffea0001702e01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6094, tgid 6094 (syz.0.26), ts 107137955401, free_ts 96582170573
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2492 [inline]
 allocate_slab mm/slub.c:2660 [inline]
 new_slab+0x247/0x330 mm/slub.c:2714
 ___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
 __slab_alloc_node mm/slub.c:4067 [inline]
 slab_alloc_node mm/slub.c:4228 [inline]
 __do_kmalloc_node mm/slub.c:4375 [inline]
 __kmalloc_noprof+0x2f2/0x510 mm/slub.c:4388
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 _iommufd_object_alloc+0x23/0x1a0 drivers/iommu/iommufd/main.c:40
 _iommufd_object_alloc_ucmd+0xb2/0x160 drivers/iommu/iommufd/main.c:84
 iommufd_fault_alloc+0x93/0x420 drivers/iommu/iommufd/eventq.c:430
 iommufd_fops_ioctl+0x34d/0x540 drivers/iommu/iommufd/main.c:508
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5932 tgid 5932 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
 vfree+0x1fd/0xb50 mm/vmalloc.c:3434
 kcov_put kernel/kcov.c:439 [inline]
 kcov_put kernel/kcov.c:435 [inline]
 kcov_close+0x34/0x60 kernel/kcov.c:535
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x14d/0x240 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x86f/0x2bf0 kernel/exit.c:961
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x41c/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88805c0b8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805c0b8380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805c0b8400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88805c0b8480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805c0b8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================

final repro crashed as (corrupted=false):
RAX: ffffffffffffffda RBX: 00007f68a29d5fa0 RCX: 00007f68a278eba9
RDX: 0000000000000004 RSI: 0000000000003b8e RDI: 0000000000000006
RBP: 00007ffdabc3ceb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f68a29d5fa0 R14: 00007f68a29d5fa0 R15: 0000000000000003
 </TASK>
==================================================================
BUG: KASAN: slab-use-after-free in instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
BUG: KASAN: slab-use-after-free in atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline]
BUG: KASAN: slab-use-after-free in __refcount_dec include/linux/refcount.h:455 [inline]
BUG: KASAN: slab-use-after-free in refcount_dec include/linux/refcount.h:476 [inline]
BUG: KASAN: slab-use-after-free in iommufd_eventq_fops_release+0x45/0xc0 drivers/iommu/iommufd/eventq.c:376
Write of size 4 at addr ffff88805c0b8404 by task syz.0.27/6095

CPU: 0 UID: 0 PID: 6095 Comm: syz.0.27 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/18/2025
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:378 [inline]
 print_report+0xcd/0x630 mm/kasan/report.c:482
 kasan_report+0xe0/0x110 mm/kasan/report.c:595
 check_region_inline mm/kasan/generic.c:183 [inline]
 kasan_check_range+0x100/0x1b0 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:96 [inline]
 atomic_fetch_sub_release include/linux/atomic/atomic-instrumented.h:400 [inline]
 __refcount_dec include/linux/refcount.h:455 [inline]
 refcount_dec include/linux/refcount.h:476 [inline]
 iommufd_eventq_fops_release+0x45/0xc0 drivers/iommu/iommufd/eventq.c:376
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x14d/0x240 kernel/task_work.c:227
 resume_user_mode_work include/linux/resume_user_mode.h:50 [inline]
 exit_to_user_mode_loop+0xeb/0x110 kernel/entry/common.c:43
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x41c/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f68a278eba9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffdabc3ce58 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: fffffffffffffff2 RBX: 00007f68a29d5fa0 RCX: 00007f68a278eba9
RDX: 0000000000000004 RSI: 0000000000003b8e RDI: 0000000000000006
RBP: 00007ffdabc3ceb0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007f68a29d5fa0 R14: 00007f68a29d5fa0 R15: 0000000000000003
 </TASK>

Allocated by task 6095:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:388 [inline]
 __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:405
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __do_kmalloc_node mm/slub.c:4376 [inline]
 __kmalloc_noprof+0x223/0x510 mm/slub.c:4388
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 _iommufd_object_alloc+0x23/0x1a0 drivers/iommu/iommufd/main.c:40
 _iommufd_object_alloc_ucmd+0xb2/0x160 drivers/iommu/iommufd/main.c:84
 iommufd_fault_alloc+0x93/0x420 drivers/iommu/iommufd/eventq.c:430
 iommufd_fops_ioctl+0x34d/0x540 drivers/iommu/iommufd/main.c:508
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 6095:
 kasan_save_stack+0x33/0x60 mm/kasan/common.c:47
 kasan_save_track+0x14/0x30 mm/kasan/common.c:68
 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:576
 poison_slab_object mm/kasan/common.c:243 [inline]
 __kasan_slab_free+0x60/0x70 mm/kasan/common.c:275
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2422 [inline]
 slab_free mm/slub.c:4695 [inline]
 kfree+0x2b4/0x4d0 mm/slub.c:4894
 iommufd_object_abort+0x10c/0x170 drivers/iommu/iommufd/main.c:124
 iommufd_fops_ioctl+0x381/0x540 drivers/iommu/iommufd/main.c:512
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88805c0b8400
 which belongs to the cache kmalloc-cg-512 of size 512
The buggy address is located 4 bytes inside of
 freed 512-byte region [ffff88805c0b8400, ffff88805c0b8600)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x5c0b8
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
memcg:ffff888032e23601
flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000040 ffff88801b84b140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080100010 00000000f5000000 ffff888032e23601
head: 00fff00000000040 ffff88801b84b140 dead000000000122 0000000000000000
head: 0000000000000000 0000000080100010 00000000f5000000 ffff888032e23601
head: 00fff00000000002 ffffea0001702e01 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 6094, tgid 6094 (syz.0.26), ts 107137955401, free_ts 96582170573
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1c0/0x230 mm/page_alloc.c:1851
 prep_new_page mm/page_alloc.c:1859 [inline]
 get_page_from_freelist+0x132b/0x38e0 mm/page_alloc.c:3858
 __alloc_frozen_pages_noprof+0x261/0x23f0 mm/page_alloc.c:5148
 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2416
 alloc_slab_page mm/slub.c:2492 [inline]
 allocate_slab mm/slub.c:2660 [inline]
 new_slab+0x247/0x330 mm/slub.c:2714
 ___slab_alloc+0xcf2/0x1750 mm/slub.c:3901
 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3992
 __slab_alloc_node mm/slub.c:4067 [inline]
 slab_alloc_node mm/slub.c:4228 [inline]
 __do_kmalloc_node mm/slub.c:4375 [inline]
 __kmalloc_noprof+0x2f2/0x510 mm/slub.c:4388
 kmalloc_noprof include/linux/slab.h:909 [inline]
 kzalloc_noprof include/linux/slab.h:1039 [inline]
 _iommufd_object_alloc+0x23/0x1a0 drivers/iommu/iommufd/main.c:40
 _iommufd_object_alloc_ucmd+0xb2/0x160 drivers/iommu/iommufd/main.c:84
 iommufd_fault_alloc+0x93/0x420 drivers/iommu/iommufd/eventq.c:430
 iommufd_fops_ioctl+0x34d/0x540 drivers/iommu/iommufd/main.c:508
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:598 [inline]
 __se_sys_ioctl fs/ioctl.c:584 [inline]
 __x64_sys_ioctl+0x18b/0x210 fs/ioctl.c:584
 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline]
 do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5932 tgid 5932 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1395 [inline]
 __free_frozen_pages+0x7d5/0x10f0 mm/page_alloc.c:2895
 vfree+0x1fd/0xb50 mm/vmalloc.c:3434
 kcov_put kernel/kcov.c:439 [inline]
 kcov_put kernel/kcov.c:435 [inline]
 kcov_close+0x34/0x60 kernel/kcov.c:535
 __fput+0x402/0xb70 fs/file_table.c:468
 task_work_run+0x14d/0x240 kernel/task_work.c:227
 exit_task_work include/linux/task_work.h:40 [inline]
 do_exit+0x86f/0x2bf0 kernel/exit.c:961
 do_group_exit+0xd3/0x2a0 kernel/exit.c:1102
 get_signal+0x2673/0x26d0 kernel/signal.c:3034
 arch_do_signal_or_restart+0x8f/0x790 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop+0x84/0x110 kernel/entry/common.c:40
 exit_to_user_mode_prepare include/linux/irq-entry-common.h:225 [inline]
 syscall_exit_to_user_mode_work include/linux/entry-common.h:175 [inline]
 syscall_exit_to_user_mode include/linux/entry-common.h:210 [inline]
 do_syscall_64+0x41c/0x4c0 arch/x86/entry/syscall_64.c:100
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff88805c0b8300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88805c0b8380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88805c0b8400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                   ^
 ffff88805c0b8480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88805c0b8500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
==================================================================