Extracting prog: 5m30.482293124s Minimizing prog: 1h51m31.683223115s Simplifying prog options: 0s Extracting C: 3m16.738541053s Simplifying C: 26m11.294104901s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 6m0s testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON-mmap-syz_open_dev$usbmon-mmap detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x2, 0x8031, 0xffffffffffffffff, 0x0) r3 = syz_open_dev$usbmon(0x0, 0x0, 0x0) mmap(&(0x7f0000000000/0xc00000)=nil, 0xc00000, 0x0, 0x12, r3, 0x0) program crashed: INFO: task hung in vfs_coredump single: successfully extracted reproducer found reproducer with 9 syscalls minimizing guilty program testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON-mmap-syz_open_dev$usbmon detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x2, 0x8031, 0xffffffffffffffff, 0x0) syz_open_dev$usbmon(0x0, 0x0, 0x0) program crashed: INFO: task hung in vfs_coredump testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON-mmap detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) mmap(&(0x7f0000000000/0xb36000)=nil, 0xb36000, 0x2, 0x8031, 0xffffffffffffffff, 0x0) program crashed: INFO: task hung in vfs_coredump testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program crashed: INFO: task hung in vfs_coredump testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900"}) syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:4 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) r0 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT, @ANYBLOB=',wfdno=', @ANYRESHEX=r0]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(0xffffffffffffffff, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r0, @ANYBLOB=',wfdno=', @ANYRESHEX=r1]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, 0x0, 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, 0x0, 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, 0x0) r1 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT, @ANYBLOB=',wfdno=', @ANYRESHEX=r1]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, 0x0) mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, 0x0, &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', 0x0, 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900"}) syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, 0x0) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900"}) syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB, @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash testing program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB, @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program did not crash extracting C reproducer testing compiled C program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump simplifying C reproducer testing compiled C program (duration=6m0s, {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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=6m0s, {Threaded:true 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON program crashed: INFO: task hung in vfs_coredump testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program crashed: INFO: task hung in vfs_coredump validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program crashed: INFO: task hung in vfs_coredump validation run: crashed=true testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:1 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:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$ptmx-openat$sw_sync-ioctl$SW_SYNC_IOC_CREATE_FENCE-syz_open_procfs-mount$9p_fd-prctl$PR_SET_SYSCALL_USER_DISPATCH_ON detailed listing: executing program 0: openat$ptmx(0xffffffffffffff9c, &(0x7f00000000c0), 0x0, 0x0) r0 = openat$sw_sync(0xffffffffffffff9c, &(0x7f0000000240), 0x22601, 0x0) ioctl$SW_SYNC_IOC_CREATE_FENCE(r0, 0xc0285700, &(0x7f0000000000)={0x2, "94c492eb0165203d36bec70800890100000000000000e1100a0000005900", 0xffffffffffffffff}) r2 = syz_open_procfs(0x0, &(0x7f00000000c0)='fd/3\x00') mount$9p_fd(0x0, &(0x7f00000001c0)='.\x00', &(0x7f0000000180), 0x0, &(0x7f00000003c0)=ANY=[@ANYBLOB='trans=fd,rfdno=', @ANYRESOCT=r1, @ANYBLOB=',wfdno=', @ANYRESHEX=r2]) prctl$PR_SET_SYSCALL_USER_DISPATCH_ON(0x3b, 0x1, 0x0, 0x63b7, 0x0) program crashed: INFO: task hung in vfs_coredump validation run: crashed=true reproducing took 2h37m12.892461159s repro crashed as (corrupted=false): INFO: task syz.0.16:6064 blocked for more than 143 seconds. Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:25928 pid:6064 tgid:6061 ppid:5986 task_flags:0x400640 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5351 [inline] __schedule+0x1737/0x4d30 kernel/sched/core.c:6954 __schedule_loop kernel/sched/core.c:7036 [inline] schedule+0x165/0x360 kernel/sched/core.c:7051 schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x3da/0x710 kernel/sched/completion.c:121 wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:269 coredump_wait fs/coredump.c:534 [inline] vfs_coredump+0x8c2/0x2ab0 fs/coredump.c:1128 get_signal+0x1109/0x1340 kernel/signal.c:3019 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:208 [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+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1bd118e9a9 RSP: 002b:00007f1bd202b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007f1bd13b6088 RCX: 00007f1bd118e9a9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f1bd13b608c RBP: 00007f1bd13b6080 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1bd13b608c R13: 0000000000000000 R14: 00007ffd6ab098e0 R15: 00007ffd6ab099c8 Showing all locks held in the system: 2 locks held by kworker/u8:1/13: 1 lock held by khungtaskd/31: #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770 2 locks held by getty/5607: #0: ffff88814d8340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline] watchdog+0xf93/0xfe0 kernel/hung_task.c:491 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_release kernel/locking/lockdep.c:5517 [inline] RIP: 0010:lock_release+0xc3/0x3e0 kernel/locking/lockdep.c:5892 Code: 02 00 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 48 8b 5c 24 20 fa 48 c7 c7 e5 dd c7 8d e8 f4 ca e1 09 65 ff 05 5d cb 49 11 44 24 20 01 00 00 00 83 3d 8e 3b 46 0e 00 0f 84 96 01 00 00 41 RSP: 0018:ffffc90000ac79b8 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 0000000000000202 RCX: adf924514a2bb600 RDX: 0000000000000000 RSI: ffffffff8dc7dde5 RDI: ffffffff8c04d400 RBP: fffffffffffffe38 R08: 0000000000000000 R09: ffffffff8b4d0e32 R10: dffffc0000000000 R11: ffffffff8b4d0d60 R12: dffffc0000000000 R13: ffffffff8b4d0e32 R14: ffffffff8e53d8a0 R15: ffff888141ac1e00 FS: 0000000000000000(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557975055a58 CR3: 000000000e338000 CR4: 00000000003526f0 Call Trace: rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x28c/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 final repro crashed as (corrupted=false): INFO: task syz.0.16:6064 blocked for more than 143 seconds. Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz.0.16 state:D stack:25928 pid:6064 tgid:6061 ppid:5986 task_flags:0x400640 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5351 [inline] __schedule+0x1737/0x4d30 kernel/sched/core.c:6954 __schedule_loop kernel/sched/core.c:7036 [inline] schedule+0x165/0x360 kernel/sched/core.c:7051 schedule_timeout+0x9a/0x270 kernel/time/sleep_timeout.c:75 do_wait_for_common kernel/sched/completion.c:100 [inline] __wait_for_common+0x3da/0x710 kernel/sched/completion.c:121 wait_for_common kernel/sched/completion.c:132 [inline] wait_for_completion_state+0x1c/0x40 kernel/sched/completion.c:269 coredump_wait fs/coredump.c:534 [inline] vfs_coredump+0x8c2/0x2ab0 fs/coredump.c:1128 get_signal+0x1109/0x1340 kernel/signal.c:3019 arch_do_signal_or_restart+0x9a/0x750 arch/x86/kernel/signal.c:337 exit_to_user_mode_loop+0x75/0x110 kernel/entry/common.c:40 exit_to_user_mode_prepare include/linux/irq-entry-common.h:208 [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+0x2bd/0x3b0 arch/x86/entry/syscall_64.c:100 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f1bd118e9a9 RSP: 002b:00007f1bd202b0e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca RAX: 00000000000000ca RBX: 00007f1bd13b6088 RCX: 00007f1bd118e9a9 RDX: 00000000000f4240 RSI: 0000000000000081 RDI: 00007f1bd13b608c RBP: 00007f1bd13b6080 R08: 7fffffffffffffff R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f1bd13b608c R13: 0000000000000000 R14: 00007ffd6ab098e0 R15: 00007ffd6ab099c8 Showing all locks held in the system: 2 locks held by kworker/u8:1/13: 1 lock held by khungtaskd/31: #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: rcu_lock_acquire include/linux/rcupdate.h:331 [inline] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: rcu_read_lock include/linux/rcupdate.h:841 [inline] #0: ffffffff8e53d8a0 (rcu_read_lock){....}-{1:3}, at: debug_show_all_locks+0x2e/0x180 kernel/locking/lockdep.c:6770 2 locks held by getty/5607: #0: ffff88814d8340a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243 #1: ffffc9000332b2f0 (&ldata->atomic_read_lock){+.+.}-{4:4}, at: n_tty_read+0x43e/0x1400 drivers/tty/n_tty.c:2222 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 31 Comm: khungtaskd Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Call Trace: dump_stack_lvl+0x189/0x250 lib/dump_stack.c:120 nmi_cpu_backtrace+0x39e/0x3d0 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x17a/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:328 [inline] watchdog+0xf93/0xfe0 kernel/hung_task.c:491 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 0 PID: 36 Comm: kworker/u8:2 Not tainted 6.16.0-rc6-next-20250718-syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/12/2025 Workqueue: bat_events batadv_nc_worker RIP: 0010:__lock_release kernel/locking/lockdep.c:5517 [inline] RIP: 0010:lock_release+0xc3/0x3e0 kernel/locking/lockdep.c:5892 Code: 02 00 00 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 48 8b 5c 24 20 fa 48 c7 c7 e5 dd c7 8d e8 f4 ca e1 09 65 ff 05 5d cb 49 11 44 24 20 01 00 00 00 83 3d 8e 3b 46 0e 00 0f 84 96 01 00 00 41 RSP: 0018:ffffc90000ac79b8 EFLAGS: 00000002 RAX: 0000000000000000 RBX: 0000000000000202 RCX: adf924514a2bb600 RDX: 0000000000000000 RSI: ffffffff8dc7dde5 RDI: ffffffff8c04d400 RBP: fffffffffffffe38 R08: 0000000000000000 R09: ffffffff8b4d0e32 R10: dffffc0000000000 R11: ffffffff8b4d0d60 R12: dffffc0000000000 R13: ffffffff8b4d0e32 R14: ffffffff8e53d8a0 R15: ffff888141ac1e00 FS: 0000000000000000(0000) GS:ffff8881257ab000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557975055a58 CR3: 000000000e338000 CR4: 00000000003526f0 Call Trace: rcu_lock_release include/linux/rcupdate.h:341 [inline] rcu_read_unlock include/linux/rcupdate.h:871 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:412 [inline] batadv_nc_worker+0x28c/0x610 net/batman-adv/network-coding.c:719 process_one_work kernel/workqueue.c:3236 [inline] process_scheduled_works+0xade/0x17b0 kernel/workqueue.c:3319 worker_thread+0x8a0/0xda0 kernel/workqueue.c:3400 kthread+0x70e/0x8a0 kernel/kthread.c:463 ret_from_fork+0x3f9/0x770 arch/x86/kernel/process.c:148 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245