Extracting prog: 7m52.872212657s
Minimizing prog: 24m25.445120458s
Simplifying prog options: 0s
Extracting C: 3m7.087592576s
Simplifying C: 23m38.511854606s
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:5 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}}): openat$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000001000), 0x149802, 0x0)
r1 = dup(r0)
fallocate(r1, 0x11, 0x0, 0x400001002000)
program crashed: INFO: task hung in blkdev_fallocate
program crashed: INFO: task hung in blkdev_fallocate
single: successfully extracted reproducer
found reproducer with 3 syscalls
minimizing guilty program
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nullb-dup
detailed listing:
executing program 0:
r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000001000), 0x149802, 0x0)
dup(r0)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nullb-fallocate
detailed listing:
executing program 0:
openat$nullb(0xffffffffffffff9c, &(0x7f0000001000), 0x149802, 0x0)
fallocate(0xffffffffffffffff, 0x11, 0x0, 0x400001002000)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): dup-fallocate
detailed listing:
executing program 0:
r0 = dup(0xffffffffffffffff)
fallocate(r0, 0x11, 0x0, 0x400001002000)
program did not crash
testing program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$nullb(0xffffffffffffff9c, 0x0, 0x149802, 0x0)
r1 = dup(r0)
fallocate(r1, 0x11, 0x0, 0x400001002000)
program did not crash
extracting C reproducer
testing compiled C program (duration=6m0s, {Threaded:true Repeat:true RepeatTimes:0 Procs:5 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}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
simplifying C reproducer
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {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}}): openat$nullb-dup-fallocate
program crashed: no output from test machine
a never seen crash title: no output from test machine, ignore
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
program crashed: INFO: task hung in blkdev_fallocate
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000001000), 0x149802, 0x0)
r1 = dup(r0)
fallocate(r1, 0x11, 0x0, 0x400001002000)
program crashed: INFO: task hung in blkdev_fallocate
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000001000), 0x149802, 0x0)
r1 = dup(r0)
fallocate(r1, 0x11, 0x0, 0x400001002000)
program crashed: INFO: task hung in blkdev_fallocate
validation run: crashed=true
testing program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 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 CallComments:true LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate
detailed listing:
executing program 0:
r0 = openat$nullb(0xffffffffffffff9c, &(0x7f0000001000), 0x149802, 0x0)
r1 = dup(r0)
fallocate(r1, 0x11, 0x0, 0x400001002000)
program crashed: INFO: task hung in blkdev_fallocate
validation run: crashed=true
reproducing took 1h8m55.02977697s
repro crashed as (corrupted=false):
INFO: task syz.0.17:4458 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:26640 pid:4458 ppid:4393 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd50179c799
RSP: 002b:00007ffedc6f6f88 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fd501a15fa0 RCX: 00007fd50179c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007fd501832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd501a15fac R14: 00007fd501a15fa0 R15: 00007fd501a15fa0
INFO: task syz.4.21:4498 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:26640 pid:4498 ppid:4406 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2e8859c799
RSP: 002b:00007fff64818278 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f2e88815fa0 RCX: 00007f2e8859c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f2e88632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e88815fac R14: 00007f2e88815fa0 R15: 00007f2e88815fa0
INFO: task syz.3.20:4499 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20 state:D stack:26640 pid:4499 ppid:4399 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcc0379c799
RSP: 002b:00007ffc3839ce88 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fcc03a15fa0 RCX: 00007fcc0379c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007fcc03832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc03a15fac R14: 00007fcc03a15fa0 R15: 00007fcc03a15fa0
INFO: task syz.1.18:4500 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18 state:D stack:26640 pid:4500 ppid:4400 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3690f9c799
RSP: 002b:00007ffec6d0f028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f3691215fa0 RCX: 00007f3690f9c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f3691032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3691215fac R14: 00007f3691215fa0 R15: 00007f3691215fa0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
3 locks held by kworker/u4:3/46:
3 locks held by kworker/1:2/128:
#0: ffff88802f7a3138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90002d87d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xca/0x14f0 net/ipv6/addrconf.c:4131
3 locks held by kworker/1:3/3598:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc9000ece7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffff88805c39d240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x3450 drivers/net/netdevsim/fib.c:1491
2 locks held by getty/4028:
#0: ffff88803057e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
3 locks held by kworker/0:6/4355:
#0: ffff88802f7a3138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90002dc7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xca/0x14f0 net/ipv6/addrconf.c:4131
3 locks held by kworker/0:9/4358:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90003207d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffff888053cd1240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x3450 drivers/net/netdevsim/fib.c:1491
2 locks held by kworker/0:13/4363:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc900032b7d00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
2 locks held by syz.2.19/4450:
1 lock held by syz.0.17/4458:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.4.21/4498:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.20/4499:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.18/4500:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.5.22/4531:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.6.23/4540:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.7.24/4597:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.9.26/4598:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.8.25/4599:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.2.27/4625:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.0.28/4626:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.29/4658:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.30/4675:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.4.31/4678:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.5.32/4710:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.6.33/4719:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.7.34/4740:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.9.36/4786:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.8.35/4792:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.2.37/4808:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.0.38/4811:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.39/4819:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.40/4842:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.4.41/4862:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.5.42/4900:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.6.43/4901:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.7.44/4920:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.9.45/4942:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.8.46/4959:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.2.47/4985:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.0.48/4997:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.49/5015:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.50/5025:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
3 locks held by syz-executor/5037:
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x824/0xfc0 net/core/rtnetlink.c:6147
#1: ffff8880440493e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x223/0x420 drivers/net/wireguard/device.c:49
#2: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#2: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2ec/0x890 kernel/rcu/tree_exp.h:962
1 lock held by syz.4.51/5039:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz-executor/5046:
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x824/0xfc0 net/core/rtnetlink.c:6147
2 locks held by syz-executor/5064:
#0: ffffffff8dd39b10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x32e/0x5b0 net/core/net_namespace.c:504
#1: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x240 net/ipv4/nexthop.c:3619
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:125 [inline]
RIP: 0010:check_preemption_disabled+0x59/0x110 lib/smp_processor_id.c:19
Code: 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 cc 65 4c 8b 3d a6 54 d5 75 41 f6 47 2f 04
RSP: 0018:ffffc90000107740 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88813fec3b80 RCX: 0000000080000000
RDX: 0000000000000000 RSI: ffffffff8a8c1f00 RDI: ffffffff8adf0f60
RBP: 00000000ffffffff R08: ffffffff89a65bf8 R09: 0000000000000004
R10: 000000000000000b R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000246 R14: ffffffff8cb2d680 R15: 00000000ffffffff
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557228533ee8 CR3: 0000000048596000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_is_held_type+0x75/0x190 kernel/locking/lockdep.c:5704
lock_is_held include/linux/lockdep.h:283 [inline]
__might_resched+0x9b/0x630 kernel/sched/core.c:9931
__mutex_lock_common kernel/locking/mutex.c:580 [inline]
__mutex_lock+0xb7/0xaf0 kernel/locking/mutex.c:747
sdata_lock net/mac80211/ieee80211_i.h:1114 [inline]
ieee80211_ibss_work+0xa8/0x10f0 net/mac80211/ibss.c:1680
cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433
process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
final repro crashed as (corrupted=false):
INFO: task syz.0.17:4458 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.0.17 state:D stack:26640 pid:4458 ppid:4393 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fd50179c799
RSP: 002b:00007ffedc6f6f88 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fd501a15fa0 RCX: 00007fd50179c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007fd501832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fd501a15fac R14: 00007fd501a15fa0 R15: 00007fd501a15fa0
INFO: task syz.4.21:4498 blocked for more than 143 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.4.21 state:D stack:26640 pid:4498 ppid:4406 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f2e8859c799
RSP: 002b:00007fff64818278 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f2e88815fa0 RCX: 00007f2e8859c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f2e88632c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f2e88815fac R14: 00007f2e88815fa0 R15: 00007f2e88815fa0
INFO: task syz.3.20:4499 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.3.20 state:D stack:26640 pid:4499 ppid:4399 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7fcc0379c799
RSP: 002b:00007ffc3839ce88 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007fcc03a15fa0 RCX: 00007fcc0379c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007fcc03832c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fcc03a15fac R14: 00007fcc03a15fa0 R15: 00007fcc03a15fa0
INFO: task syz.1.18:4500 blocked for more than 144 seconds.
Not tainted syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz.1.18 state:D stack:26640 pid:4500 ppid:4400 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5245 [inline]
__schedule+0x11d1/0x40e0 kernel/sched/core.c:6562
schedule+0xb9/0x180 kernel/sched/core.c:6638
rwsem_down_write_slowpath+0xc2e/0x1110 kernel/locking/rwsem.c:1189
inode_lock include/linux/fs.h:758 [inline]
blkdev_fallocate+0x200/0x4a0 block/fops.c:712
vfs_fallocate+0x584/0x6f0 fs/open.c:323
ksys_fallocate fs/open.c:346 [inline]
__do_sys_fallocate fs/open.c:354 [inline]
__se_sys_fallocate fs/open.c:352 [inline]
__x64_sys_fallocate+0xbd/0x100 fs/open.c:352
do_syscall_x64 arch/x86/entry/common.c:46 [inline]
do_syscall_64+0x4c/0xa0 arch/x86/entry/common.c:76
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f3690f9c799
RSP: 002b:00007ffec6d0f028 EFLAGS: 00000246 ORIG_RAX: 000000000000011d
RAX: ffffffffffffffda RBX: 00007f3691215fa0 RCX: 00007f3690f9c799
RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004
RBP: 00007f3691032c99 R08: 0000000000000000 R09: 0000000000000000
R10: 0000400001002000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f3691215fac R14: 00007f3691215fa0 R15: 00007f3691215fa0
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8cb2dfb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8cb2e7d0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x33/0xf00 kernel/rcu/tasks.h:517
1 lock held by khungtaskd/28:
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:350 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:791 [inline]
#0: ffffffff8cb2d620 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x290 kernel/locking/lockdep.c:6513
3 locks held by kworker/u4:3/46:
3 locks held by kworker/1:2/128:
#0: ffff88802f7a3138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90002d87d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xca/0x14f0 net/ipv6/addrconf.c:4131
3 locks held by kworker/1:3/3598:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc9000ece7d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffff88805c39d240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x3450 drivers/net/netdevsim/fib.c:1491
2 locks held by getty/4028:
#0: ffff88803057e098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244
#1: ffffc9000327b2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x429/0x1390 drivers/tty/n_tty.c:2198
3 locks held by kworker/0:6/4355:
#0: ffff88802f7a3138 ((wq_completion)ipv6_addrconf){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90002dc7d00 ((work_completion)(&(&ifa->dad_work)->work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: addrconf_dad_work+0xca/0x14f0 net/ipv6/addrconf.c:4131
3 locks held by kworker/0:9/4358:
#0: ffff888017470938 ((wq_completion)events){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc90003207d00 ((work_completion)(&data->fib_event_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#2: ffff888053cd1240 (&data->fib_lock){+.+.}-{3:3}, at: nsim_fib_event_work+0x270/0x3450 drivers/net/netdevsim/fib.c:1491
2 locks held by kworker/0:13/4363:
#0: ffff888017472138 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
#1: ffffc900032b7d00 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work+0x7b0/0x1160 kernel/workqueue.c:2267
2 locks held by syz.2.19/4450:
1 lock held by syz.0.17/4458:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.4.21/4498:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.20/4499:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.18/4500:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.5.22/4531:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.6.23/4540:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.7.24/4597:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.9.26/4598:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.8.25/4599:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.2.27/4625:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.0.28/4626:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.29/4658:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.30/4675:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.4.31/4678:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.5.32/4710:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.6.33/4719:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.7.34/4740:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.9.36/4786:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.8.35/4792:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.2.37/4808:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.0.38/4811:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.39/4819:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.40/4842:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.4.41/4862:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.5.42/4900:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.6.43/4901:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.7.44/4920:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.9.45/4942:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.8.46/4959:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.2.47/4985:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.0.48/4997:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.1.49/5015:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz.3.50/5025:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
3 locks held by syz-executor/5037:
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x824/0xfc0 net/core/rtnetlink.c:6147
#1: ffff8880440493e8 (&wg->device_update_lock){+.+.}-{3:3}, at: wg_open+0x223/0x420 drivers/net/wireguard/device.c:49
#2: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#2: ffffffff8cb332f8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x2ec/0x890 kernel/rcu/tree_exp.h:962
1 lock held by syz.4.51/5039:
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:758 [inline]
#0: ffff888148c83320 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: blkdev_fallocate+0x200/0x4a0 block/fops.c:712
1 lock held by syz-executor/5046:
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnl_lock net/core/rtnetlink.c:74 [inline]
#0: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: rtnetlink_rcv_msg+0x824/0xfc0 net/core/rtnetlink.c:6147
2 locks held by syz-executor/5064:
#0: ffffffff8dd39b10 (pernet_ops_rwsem){++++}-{3:3}, at: copy_net_ns+0x32e/0x5b0 net/core/net_namespace.c:504
#1: ffffffff8dd469e8 (rtnl_mutex){+.+.}-{3:3}, at: register_nexthop_notifier+0x84/0x240 net/ipv4/nexthop.c:3619
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Call Trace:
dump_stack_lvl+0x188/0x24e lib/dump_stack.c:106
nmi_cpu_backtrace+0x3e6/0x460 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x1d4/0x450 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline]
watchdog+0xeee/0xf30 kernel/hung_task.c:377
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 11 Comm: kworker/u4:1 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026
Workqueue: events_unbound cfg80211_wiphy_work
RIP: 0010:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:125 [inline]
RIP: 0010:check_preemption_disabled+0x59/0x110 lib/smp_processor_id.c:19
Code: 48 8b 0c 25 28 00 00 00 48 3b 4c 24 08 0f 85 c4 00 00 00 48 83 c4 10 5b 41 5e 41 5f 5d c3 48 c7 04 24 00 00 00 00 9c 8f 04 24 04 24 00 02 00 00 74 cc 65 4c 8b 3d a6 54 d5 75 41 f6 47 2f 04
RSP: 0018:ffffc90000107740 EFLAGS: 00000046
RAX: 0000000000000000 RBX: ffff88813fec3b80 RCX: 0000000080000000
RDX: 0000000000000000 RSI: ffffffff8a8c1f00 RDI: ffffffff8adf0f60
RBP: 00000000ffffffff R08: ffffffff89a65bf8 R09: 0000000000000004
R10: 000000000000000b R11: 0000000000000000 R12: 0000000000000000
R13: 0000000000000246 R14: ffffffff8cb2d680 R15: 00000000ffffffff
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000557228533ee8 CR3: 0000000048596000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
lockdep_recursion_inc kernel/locking/lockdep.c:462 [inline]
lock_is_held_type+0x75/0x190 kernel/locking/lockdep.c:5704
lock_is_held include/linux/lockdep.h:283 [inline]
__might_resched+0x9b/0x630 kernel/sched/core.c:9931
__mutex_lock_common kernel/locking/mutex.c:580 [inline]
__mutex_lock+0xb7/0xaf0 kernel/locking/mutex.c:747
sdata_lock net/mac80211/ieee80211_i.h:1114 [inline]
ieee80211_ibss_work+0xa8/0x10f0 net/mac80211/ibss.c:1680
cfg80211_wiphy_work+0x221/0x260 net/wireless/core.c:433
process_one_work+0x8a2/0x1160 kernel/workqueue.c:2292
worker_thread+0xaa2/0x1270 kernel/workqueue.c:2439
kthread+0x29d/0x330 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295