syzbot


INFO: task hung in unlink_anon_vmas

Status: auto-closed as invalid on 2020/06/05 16:13
Reported-by: syzbot+099f98458bf92e06738f@syzkaller.appspotmail.com
First crash: 882d, last: 882d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in unlink_anon_vmas (2) 1 1123d 1123d 0/22 auto-closed as invalid on 2019/10/25 09:21
linux-4.19 INFO: task hung in unlink_anon_vmas 3 176d 201d 0/1 auto-closed as invalid on 2022/05/12 00:11
upstream INFO: task hung in unlink_anon_vmas 1 1174d 1174d 0/22 closed as invalid on 2019/05/08 13:05
android-414 INFO: task hung in unlink_anon_vmas 1 1406d 1406d 0/1 auto-closed as invalid on 2019/02/27 08:21

Sample crash report:
RDX: 0000000000000000 RSI: 0000000000000009 RDI: 0000000000001ca3
RBP: 000000c42dbd3628 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000216 R12: 0000000000000000
R13: 000000c42dbd3750 R14: 000000c42dbd3750 R15: 0000000000000000
INFO: task syz-executor.4:28996 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28928 28996   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f5f6cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075c078 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c078
RBP: 000000000075c070 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c07c
R13: 00007ffe94e9a1bf R14: 00007fda7f5f79c0 R15: 000000000075c07c
INFO: task syz-executor.4:30127 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28928 30127   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f617cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4
R13: 00007ffe94e9a1bf R14: 00007fda7f6189c0 R15: 000000000075bfd4
INFO: task syz-executor.4:30391 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28928 30391   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f617cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4
R13: 00007ffe94e9a1bf R14: 00007fda7f6189c0 R15: 000000000075bfd4
INFO: task syz-executor.4:9633 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28792  9633   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f5d5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075c120 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c120
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c124
R13: 00007ffe94e9a1bf R14: 00007fda7f5d69c0 R15: 000000000075c124
INFO: task syz-executor.4:9831 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28720  9831   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f5d5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075c120 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c120
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c124
R13: 00007ffe94e9a1bf R14: 00007fda7f5d69c0 R15: 000000000075c124
INFO: task syz-executor.4:10092 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28792 10092   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f5d5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075c120 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c120
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c124
R13: 00007ffe94e9a1bf R14: 00007fda7f5d69c0 R15: 000000000075c124
INFO: task syz-executor.4:10510 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D28792 10510   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f5d5cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075c120 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075c120
RBP: 000000000075c118 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075c124
R13: 00007ffe94e9a1bf R14: 00007fda7f5d69c0 R15: 000000000075c124
INFO: task syz-executor.4:11287 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29016 11287   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f617cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4
R13: 00007ffe94e9a1bf R14: 00007fda7f6189c0 R15: 000000000075bfd4
INFO: task syz-executor.4:11391 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29016 11391   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f617cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4
R13: 00007ffe94e9a1bf R14: 00007fda7f6189c0 R15: 000000000075bfd4
INFO: task syz-executor.4:11898 blocked for more than 140 seconds.
      Not tainted 4.14.170-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
syz-executor.4  D29016 11898   7338 0x80000000
Call Trace:
 context_switch kernel/sched/core.c:2808 [inline]
 __schedule+0x7b8/0x1cd0 kernel/sched/core.c:3384
 schedule+0x92/0x1c0 kernel/sched/core.c:3428
 __rwsem_down_write_failed_common kernel/locking/rwsem-xadd.c:588 [inline]
 rwsem_down_write_failed+0x5ce/0xb50 kernel/locking/rwsem-xadd.c:617
 call_rwsem_down_write_failed+0x17/0x30 arch/x86/lib/rwsem.S:105
 __down_write arch/x86/include/asm/rwsem.h:126 [inline]
 down_write+0x53/0x90 kernel/locking/rwsem.c:56
 lock_anon_vma_root mm/rmap.c:238 [inline]
 unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
 free_pgtables+0x183/0x2b0 mm/memory.c:643
 exit_mmap+0x294/0x4e0 mm/mmap.c:3057
 __mmput kernel/fork.c:930 [inline]
 mmput+0x114/0x440 kernel/fork.c:951
 exit_mm kernel/exit.c:545 [inline]
 do_exit+0x952/0x2cd0 kernel/exit.c:845
 do_group_exit+0x111/0x330 kernel/exit.c:955
 get_signal+0x381/0x1cd0 kernel/signal.c:2418
 do_signal+0x86/0x19a0 arch/x86/kernel/signal.c:814
 exit_to_usermode_loop+0x15c/0x220 arch/x86/entry/common.c:160
 prepare_exit_to_usermode arch/x86/entry/common.c:199 [inline]
 syscall_return_slowpath arch/x86/entry/common.c:270 [inline]
 do_syscall_64+0x4bc/0x640 arch/x86/entry/common.c:297
 entry_SYSCALL_64_after_hwframe+0x42/0xb7
RIP: 0033:0x45b399
RSP: 002b:00007fda7f617cf8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000075bfd0 RCX: 000000000045b399
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000075bfd0
RBP: 000000000075bfc8 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000075bfd4
R13: 00007ffe94e9a1bf R14: 00007fda7f6189c0 R15: 000000000075bfd4

Showing all locks held in the system:
1 lock held by khungtaskd/1057:
 #0:  (tasklist_lock){.+.+}, at: [<ffffffff81488cf8>] debug_show_all_locks+0x7f/0x21f kernel/locking/lockdep.c:4544
2 locks held by getty/7290:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7291:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7292:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7293:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7294:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7295:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
2 locks held by getty/7296:
 #0:  (&tty->ldisc_sem){++++}, at: [<ffffffff866928d3>] ldsem_down_read+0x33/0x40 drivers/tty/tty_ldsem.c:376
 #1:  (&ldata->atomic_read_lock){+.+.}, at: [<ffffffff834c38d6>] n_tty_read+0x1e6/0x17d0 drivers/tty/n_tty.c:2156
1 lock held by syz-executor.4/28996:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/30127:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/30391:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.2/32427:
 #0:  (&sb->s_type->i_mutex_key#11){+.+.}, at: [<ffffffff85167e89>] inode_lock include/linux/fs.h:718 [inline]
 #0:  (&sb->s_type->i_mutex_key#11){+.+.}, at: [<ffffffff85167e89>] __sock_release+0x89/0x2b0 net/socket.c:601
1 lock held by syz-executor.2/32444:
 #0:  (&sb->s_type->i_mutex_key#11){+.+.}, at: [<ffffffff85167e89>] inode_lock include/linux/fs.h:718 [inline]
 #0:  (&sb->s_type->i_mutex_key#11){+.+.}, at: [<ffffffff85167e89>] __sock_release+0x89/0x2b0 net/socket.c:601
1 lock held by syz-executor.4/9633:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/9831:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/10092:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/10510:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/11287:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/11391:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/11898:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/11920:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/11994:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/12041:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/12086:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/12123:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/12140:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/12465:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/12573:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
2 locks held by kworker/0:0/14143:
 #0:  ("events"){+.+.}, at: [<ffffffff813d223e>] work_static include/linux/workqueue.h:199 [inline]
 #0:  ("events"){+.+.}, at: [<ffffffff813d223e>] set_work_data kernel/workqueue.c:619 [inline]
 #0:  ("events"){+.+.}, at: [<ffffffff813d223e>] set_work_pool_and_clear_pending kernel/workqueue.c:646 [inline]
 #0:  ("events"){+.+.}, at: [<ffffffff813d223e>] process_one_work+0x76e/0x1600 kernel/workqueue.c:2085
 #1:  (key_gc_work){+.+.}, at: [<ffffffff813d227b>] process_one_work+0x7ab/0x1600 kernel/workqueue.c:2089
1 lock held by syz-executor.4/22379:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/22399:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/24378:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/24555:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/24809:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/24889:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/24954:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/24988:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25239:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25402:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25476:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25521:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25746:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25841:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/25971:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26013:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26184:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26269:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26318:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26367:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26405:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26483:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26529:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26572:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26651:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26720:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26756:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/26955:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27039:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27138:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27497:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27553:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27580:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27617:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27766:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27834:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/27934:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/28048:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/28105:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/28737:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/28786:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.4/28840:
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] lock_anon_vma_root mm/rmap.c:238 [inline]
 #0:  (&anon_vma->rwsem){++++}, at: [<ffffffff8180b7b4>] unlink_anon_vmas+0x184/0x800 mm/rmap.c:388
1 lock held by syz-executor.2/30698:
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f6c84>] nfnl_lock+0x24/0x30 net/netfilter/nfnetlink.c:61
1 lock held by syz-executor.4/30722:
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnl_lock net/netfilter/nfnetlink.c:61 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnetlink_rcv_batch net/netfilter/nfnetlink.c:303 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:495 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnetlink_rcv+0x54e/0x1650 net/netfilter/nfnetlink.c:513
1 lock held by syz-executor.5/30732:
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnl_lock net/netfilter/nfnetlink.c:61 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnetlink_rcv_batch net/netfilter/nfnetlink.c:303 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnetlink_rcv_skb_batch net/netfilter/nfnetlink.c:495 [inline]
 #0:  (&table[i].mutex){+.+.}, at: [<ffffffff853f791e>] nfnetlink_rcv+0x54e/0x1650 net/netfilter/nfnetlink.c:513

=============================================


Crashes (1):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci2-linux-4-14 2020/02/06 16:11 linux-4.14.y e0f8b8a65a47 5be3a391 .config log report