Extracting prog: 7m3.812125937s Minimizing prog: 24m39.002435163s Simplifying prog options: 0s Extracting C: 3m28.280504394s Simplifying C: 24m34.318260741s extracting reproducer from 1 programs testing a last program of every proc single: executing 1 programs separately with timeout 30s testing program (duration=30s, {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 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, 0x7fffffffffffffff) program did not crash single: failed to extract reproducer single: executing 1 programs separately with timeout 1m40s testing program (duration=1m40s, {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 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, 0x7fffffffffffffff) program did not crash single: failed to extract reproducer 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 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, 0x7fffffffffffffff) 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 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 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, 0x7fffffffffffffff) 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): dup-fallocate detailed listing: executing program 0: r0 = dup(0xffffffffffffffff) fallocate(r0, 0x11, 0x0, 0x7fffffffffffffff) 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 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, 0x7fffffffffffffff) 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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate program crashed: INFO: task hung in blkdev_fallocate simplifying C reproducer testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox:none SandboxArg:0 Leak:false NetInjection:true NetDevices:true NetReset:true Cgroups:true BinfmtMisc:true CloseFDs:true KCSAN:false DevlinkPCI:false NicVF:false USB:true VhciInjection:true Wifi:true IEEE802154:true Sysctl:true Swap:true UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate program crashed: no output from test machine a never seen crash title: no output from test machine, ignore testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:true Sysctl:true Swap:false UseTmpDir:true HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate program crashed: INFO: task hung in blkdev_fallocate testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:true Swap:false UseTmpDir:false HandleSegv:true Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$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 LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate program crashed: INFO: task hung in blkdev_fallocate testing compiled C program (duration=6m0s, {Threaded:false Repeat:true RepeatTimes:0 Procs:5 Slowdown:1 Sandbox: SandboxArg:0 Leak:false NetInjection:false NetDevices:false NetReset:false Cgroups:false BinfmtMisc:false CloseFDs:false KCSAN:false DevlinkPCI:false NicVF:false USB:false VhciInjection:false Wifi:false IEEE802154:false Sysctl:false Swap:false UseTmpDir:false HandleSegv:false Trace:false LegacyOptions:{Collide:false Fault:false FaultCall:0 FaultNth:0}}): openat$nullb-dup-fallocate program crashed: INFO: task hung in blkdev_fallocate reproducing took 59m45.413349703s repro crashed as (corrupted=false): INFO: task syz-executor268:5843 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor268 state:D stack:27728 pid:5843 tgid:5843 ppid:5838 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_write_slowpath+0x539/0x12a0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d8/0x200 kernel/locking/rwsem.c:1578 filemap_invalidate_lock include/linux/fs.h:860 [inline] blkdev_fallocate+0x1da/0x390 block/fops.c:808 vfs_fallocate+0x459/0xf90 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xd9/0x150 fs/open.c:362 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f02bedb4b29 RSP: 002b:00007ffc211738f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f02bedb4b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 7fffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc21173b18 R14: 00007ffc21173920 R15: 00007ffc21173910 INFO: task syz-executor268:5844 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor268 state:D stack:28384 pid:5844 tgid:5844 ppid:5839 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_write_slowpath+0x539/0x12a0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d8/0x200 kernel/locking/rwsem.c:1578 filemap_invalidate_lock include/linux/fs.h:860 [inline] blkdev_fallocate+0x1da/0x390 block/fops.c:808 vfs_fallocate+0x459/0xf90 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xd9/0x150 fs/open.c:362 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f02bedb4b29 RSP: 002b:00007ffc211738f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f02bedb4b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 7fffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc21173b18 R14: 00007ffc21173920 R15: 00007ffc21173910 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 1 lock held by klogd/5189: 1 lock held by dhcpcd/5493: 2 locks held by getty/5581: #0: ffff888031df60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 1 lock held by syz-executor268/5842: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5843: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5844: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5845: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5852: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 101 PID: 5493 Comm: dhcpcd Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:mark_lock+0x0/0xc60 kernel/locking/lockdep.c:4686 Code: 90 e8 04 c6 84 00 e9 db fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 48 89 e5 41 57 41 56 41 89 d6 48 ba 00 00 00 00 00 fc ff df 41 RSP: 0018:ffffc9000449f6e8 EFLAGS: 00000002 RAX: 000000000000000c RBX: ffff888030c92f92 RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffff888030c92f70 RDI: ffff888030c92440 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2dc5d8e R10: ffffffff96e2ec77 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888030c92f70 R14: 0000000000000004 R15: ffff888030c92440 FS: 00007f6467a3c740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ab00f64018 CR3: 00000000335d0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_usage kernel/locking/lockdep.c:4646 [inline] __lock_acquire+0x906/0x3ce0 kernel/locking/lockdep.c:5156 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 debug_object_activate+0x199/0x540 lib/debugobjects.c:708 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline] __call_rcu_common.constprop.0+0x2c/0x7a0 kernel/rcu/tree.c:3071 __put_partials+0x14c/0x170 mm/slub.c:3145 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x245/0x590 security/tomoyo/file.c:723 security_file_ioctl+0x9b/0x240 security/security.c:2910 __do_sys_ioctl fs/ioctl.c:901 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0xbb/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6467b0ad49 Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 RSP: 002b:00007fff67d87ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000558978c4cd50 RCX: 00007f6467b0ad49 RDX: 00007fff67d87ee0 RSI: 0000000000008921 RDI: 0000000000000011 RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000036 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff67d87ee0 R13: 00005589495f6f88 R14: 0000558978c4cd50 R15: 0000558978c51f60 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.527 msecs final repro crashed as (corrupted=false): INFO: task syz-executor268:5843 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor268 state:D stack:27728 pid:5843 tgid:5843 ppid:5838 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_write_slowpath+0x539/0x12a0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d8/0x200 kernel/locking/rwsem.c:1578 filemap_invalidate_lock include/linux/fs.h:860 [inline] blkdev_fallocate+0x1da/0x390 block/fops.c:808 vfs_fallocate+0x459/0xf90 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xd9/0x150 fs/open.c:362 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f02bedb4b29 RSP: 002b:00007ffc211738f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f02bedb4b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 7fffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc21173b18 R14: 00007ffc21173920 R15: 00007ffc21173910 INFO: task syz-executor268:5844 blocked for more than 143 seconds. Not tainted 6.12.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor268 state:D stack:28384 pid:5844 tgid:5844 ppid:5839 flags:0x00000006 Call Trace: context_switch kernel/sched/core.c:5328 [inline] __schedule+0xe55/0x5740 kernel/sched/core.c:6690 __schedule_loop kernel/sched/core.c:6767 [inline] schedule+0xe7/0x350 kernel/sched/core.c:6782 schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6839 rwsem_down_write_slowpath+0x539/0x12a0 kernel/locking/rwsem.c:1176 __down_write_common kernel/locking/rwsem.c:1304 [inline] __down_write kernel/locking/rwsem.c:1313 [inline] down_write+0x1d8/0x200 kernel/locking/rwsem.c:1578 filemap_invalidate_lock include/linux/fs.h:860 [inline] blkdev_fallocate+0x1da/0x390 block/fops.c:808 vfs_fallocate+0x459/0xf90 fs/open.c:333 ksys_fallocate fs/open.c:356 [inline] __do_sys_fallocate fs/open.c:364 [inline] __se_sys_fallocate fs/open.c:362 [inline] __x64_sys_fallocate+0xd9/0x150 fs/open.c:362 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f02bedb4b29 RSP: 002b:00007ffc211738f8 EFLAGS: 00000246 ORIG_RAX: 000000000000011d RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f02bedb4b29 RDX: 0000000000000000 RSI: 0000000000000011 RDI: 0000000000000004 RBP: 00000000000f4240 R08: 00000000000000a0 R09: 00000000000000a0 R10: 7fffffffffffffff R11: 0000000000000246 R12: 0000000000000001 R13: 00007ffc21173b18 R14: 00007ffc21173920 R15: 00007ffc21173910 Showing all locks held in the system: 1 lock held by khungtaskd/30: #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:337 [inline] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:849 [inline] #0: ffffffff8e1b8340 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x7f/0x390 kernel/locking/lockdep.c:6720 1 lock held by klogd/5189: 1 lock held by dhcpcd/5493: 2 locks held by getty/5581: #0: ffff888031df60a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243 #1: ffffc900032532f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfba/0x1480 drivers/tty/n_tty.c:2211 1 lock held by syz-executor268/5842: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5843: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5844: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5845: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 1 lock held by syz-executor268/5852: #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:860 [inline] #0: ffff888023a0ce40 (mapping.invalidate_lock#2){++++}-{3:3}, at: blkdev_fallocate+0x1da/0x390 block/fops.c:808 ============================================= NMI backtrace for cpu 1 CPU: 1 UID: 0 PID: 30 Comm: khungtaskd Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113 nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:162 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline] watchdog+0xf0c/0x1240 kernel/hung_task.c:379 kthread+0x2c1/0x3a0 kernel/kthread.c:389 ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 UID: 101 PID: 5493 Comm: dhcpcd Not tainted 6.12.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/30/2024 RIP: 0010:mark_lock+0x0/0xc60 kernel/locking/lockdep.c:4686 Code: 90 e8 04 c6 84 00 e9 db fe ff ff 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <55> 48 89 e5 41 57 41 56 41 89 d6 48 ba 00 00 00 00 00 fc ff df 41 RSP: 0018:ffffc9000449f6e8 EFLAGS: 00000002 RAX: 000000000000000c RBX: ffff888030c92f92 RCX: 0000000000000000 RDX: 0000000000000008 RSI: ffff888030c92f70 RDI: ffff888030c92440 RBP: 0000000000000000 R08: 0000000000000000 R09: fffffbfff2dc5d8e R10: ffffffff96e2ec77 R11: 0000000000000000 R12: dffffc0000000000 R13: ffff888030c92f70 R14: 0000000000000004 R15: ffff888030c92440 FS: 00007f6467a3c740(0000) GS:ffff8880b8600000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055ab00f64018 CR3: 00000000335d0000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: mark_usage kernel/locking/lockdep.c:4646 [inline] __lock_acquire+0x906/0x3ce0 kernel/locking/lockdep.c:5156 lock_acquire.part.0+0x11b/0x380 kernel/locking/lockdep.c:5825 __raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline] _raw_spin_lock_irqsave+0x3a/0x60 kernel/locking/spinlock.c:162 debug_object_activate+0x199/0x540 lib/debugobjects.c:708 debug_rcu_head_queue kernel/rcu/rcu.h:224 [inline] __call_rcu_common.constprop.0+0x2c/0x7a0 kernel/rcu/tree.c:3071 __put_partials+0x14c/0x170 mm/slub.c:3145 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x192/0x1e0 mm/kasan/quarantine.c:286 __kasan_kmalloc+0x8a/0xb0 mm/kasan/common.c:385 kasan_kmalloc include/linux/kasan.h:257 [inline] __do_kmalloc_node mm/slub.c:4264 [inline] __kmalloc_noprof+0x1e8/0x400 mm/slub.c:4276 kmalloc_noprof include/linux/slab.h:882 [inline] tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x245/0x590 security/tomoyo/file.c:723 security_file_ioctl+0x9b/0x240 security/security.c:2910 __do_sys_ioctl fs/ioctl.c:901 [inline] __se_sys_ioctl fs/ioctl.c:893 [inline] __x64_sys_ioctl+0xbb/0x220 fs/ioctl.c:893 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6467b0ad49 Code: 5c c3 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <41> 89 c0 3d 00 f0 ff ff 76 10 48 8b 15 ae 60 0d 00 f7 d8 41 83 c8 RSP: 002b:00007fff67d87ed8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000558978c4cd50 RCX: 00007f6467b0ad49 RDX: 00007fff67d87ee0 RSI: 0000000000008921 RDI: 0000000000000011 RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000036 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fff67d87ee0 R13: 00005589495f6f88 R14: 0000558978c4cd50 R15: 0000558978c51f60 INFO: NMI handler (nmi_cpu_backtrace_handler) took too long to run: 1.527 msecs