syzbot


INFO: task hung in dup_mm (2)

Status: closed as invalid on 2022/02/07 19:19
Reported-by: syzbot+@syzkaller.appspotmail.com
First crash: 525d, last: 382d
similar bugs (1):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream INFO: task hung in dup_mm 2 881d 944d 0/24 auto-closed as invalid on 2020/10/06 05:48

Sample crash report:
INFO: task syz-executor.1:6623 blocked for more than 143 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1  state:D stack:23288 pid: 6623 ppid:  6573 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 dup_mmap kernel/fork.c:577 [inline]
 dup_mm+0x761/0x13e0 kernel/fork.c:1453
 copy_mm kernel/fork.c:1505 [inline]
 copy_process+0x6fcf/0x7580 kernel/fork.c:2194
 kernel_clone+0xe7/0xac0 kernel/fork.c:2584
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2701
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x464beb
RSP: 002b:0000000000a9fd50 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000464beb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000191f400
R10: 000000000191f6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000a9fe40
INFO: task syz-executor.4:7136 blocked for more than 143 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:23624 pid: 7136 ppid:  6576 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 dup_mmap kernel/fork.c:577 [inline]
 dup_mm+0x761/0x13e0 kernel/fork.c:1453
 copy_mm kernel/fork.c:1505 [inline]
 copy_process+0x6fcf/0x7580 kernel/fork.c:2194
 kernel_clone+0xe7/0xac0 kernel/fork.c:2584
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2701
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x464beb
RSP: 002b:0000000000a9fd50 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000464beb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 000000000283d400
R10: 000000000283d6d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000a9fe40
INFO: task syz-executor.5:7461 blocked for more than 144 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.5  state:D stack:22776 pid: 7461 ppid:  6706 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 dup_mmap kernel/fork.c:577 [inline]
 dup_mm+0x761/0x13e0 kernel/fork.c:1453
 copy_mm kernel/fork.c:1505 [inline]
 copy_process+0x6fcf/0x7580 kernel/fork.c:2194
 kernel_clone+0xe7/0xac0 kernel/fork.c:2584
 __do_sys_clone+0xc8/0x110 kernel/fork.c:2701
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x464beb
RSP: 002b:0000000000a9fd50 EFLAGS: 00000246 ORIG_RAX: 0000000000000038
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000464beb
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000001200011
RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000003395400
R10: 00000000033956d0 R11: 0000000000000246 R12: 0000000000000001
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000a9fe40
INFO: task syz-executor.3:15556 blocked for more than 145 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:25960 pid:15556 ppid:  6829 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 unlink_file_vma+0x7d/0x110 mm/mmap.c:169
 free_pgtables+0x1b3/0x2f0 mm/memory.c:427
 exit_mmap+0x1df/0x630 mm/mmap.c:3172
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 __do_sys_exit_group kernel/exit.c:933 [inline]
 __se_sys_exit_group kernel/exit.c:931 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007fe42b16dbc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 00000000004665f9 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 000000000056bf80
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 0000000000a9fb1f R14: 00007fe42b16e300 R15: 0000000000022000
INFO: task syz-executor.3:15569 blocked for more than 145 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:26064 pid:15569 ppid:  6829 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 unlink_file_vma+0x7d/0x110 mm/mmap.c:169
 free_pgtables+0x1b3/0x2f0 mm/memory.c:427
 exit_mmap+0x1df/0x630 mm/mmap.c:3172
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 __do_sys_exit_group kernel/exit.c:933 [inline]
 __se_sys_exit_group kernel/exit.c:931 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007fe42b16dbc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 00000000004665f9 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 000000000056bf80
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 0000000000a9fb1f R14: 00007fe42b16e300 R15: 0000000000022000
INFO: task syz-executor.4:15572 blocked for more than 146 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.4  state:D stack:26072 pid:15572 ppid:  7136 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 unlink_file_vma+0x7d/0x110 mm/mmap.c:169
 free_pgtables+0x1b3/0x2f0 mm/memory.c:427
 exit_mmap+0x1df/0x630 mm/mmap.c:3172
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 __do_sys_exit_group kernel/exit.c:933 [inline]
 __se_sys_exit_group kernel/exit.c:931 [inline]
 __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007f0f05d37bc8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 00000000004665f9 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 000000000000000b R08: 0000000000000000 R09: 000000000056bf80
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 0000000000a9fb1f R14: 00007f0f05d38300 R15: 0000000000022000
INFO: task syz-executor.0:15583 blocked for more than 146 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:28352 pid:15583 ppid:  6585 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 unlink_file_vma+0x7d/0x110 mm/mmap.c:169
 free_pgtables+0x1b3/0x2f0 mm/memory.c:427
 exit_mmap+0x1df/0x630 mm/mmap.c:3172
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2868
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007f79f01a0218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 0000000000a9fb1f R14: 00007f79f01a0300 R15: 0000000000022000
INFO: task syz-executor.3:15588 blocked for more than 147 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.3  state:D stack:27080 pid:15588 ppid:  6829 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 unlink_file_vma+0x7d/0x110 mm/mmap.c:169
 free_pgtables+0x1b3/0x2f0 mm/memory.c:427
 exit_mmap+0x1df/0x630 mm/mmap.c:3172
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2868
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007fe42b16e218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 0000000000a9fb1f R14: 00007fe42b16e300 R15: 0000000000022000
INFO: task syz-executor.2:15589 blocked for more than 147 seconds.
      Not tainted 5.15.0-rc1-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2  state:D stack:26864 pid:15589 ppid:  6713 flags:0x00004000
Call Trace:
 context_switch kernel/sched/core.c:4940 [inline]
 __schedule+0x940/0x26f0 kernel/sched/core.c:6287
 schedule+0xd3/0x270 kernel/sched/core.c:6366
 rwsem_down_write_slowpath+0x7b9/0x11d0 kernel/locking/rwsem.c:1107
 __down_write_common kernel/locking/rwsem.c:1262 [inline]
 __down_write_common kernel/locking/rwsem.c:1259 [inline]
 __down_write kernel/locking/rwsem.c:1271 [inline]
 down_write+0x137/0x150 kernel/locking/rwsem.c:1518
 i_mmap_lock_write include/linux/fs.h:501 [inline]
 unlink_file_vma+0x7d/0x110 mm/mmap.c:169
 free_pgtables+0x1b3/0x2f0 mm/memory.c:427
 exit_mmap+0x1df/0x630 mm/mmap.c:3172
 __mmput+0x122/0x4b0 kernel/fork.c:1115
 mmput+0x58/0x60 kernel/fork.c:1136
 exit_mm kernel/exit.c:501 [inline]
 do_exit+0xabc/0x2a30 kernel/exit.c:812
 do_group_exit+0x125/0x310 kernel/exit.c:922
 get_signal+0x47f/0x2160 kernel/signal.c:2868
 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865
 handle_signal_work kernel/entry/common.c:148 [inline]
 exit_to_user_mode_loop kernel/entry/common.c:172 [inline]
 exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209
 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
 syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302
 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
RSP: 002b:00007fd97204d218 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 000000000056bf88 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 000000000056bf88
RBP: 000000000056bf80 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf8c
R13: 0000000000a9fb1f R14: 00007fd97204d300 R15: 0000000000022000

Showing all locks held in the system:
1 lock held by khungtaskd/26:
 #0: ffffffff8b97fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446
1 lock held by in:imklog/6257:
 #0: ffff8880731ee370 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990
1 lock held by syz-executor.0/6572:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.1/6573:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.2/6574:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.3/6575:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.4/6576:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
4 locks held by syz-executor.1/6623:
 #0: ffffffff8ba524f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap kernel/fork.c:498 [inline]
 #0: ffffffff8ba524f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm+0x108/0x13e0 kernel/fork.c:1453
 #1: ffff88807d3da428 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #1: ffff88807d3da428 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mmap kernel/fork.c:499 [inline]
 #1: ffff88807d3da428 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mm+0x12e/0x13e0 kernel/fork.c:1453
 #2: ffff888080ab1d28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:78 [inline]
 #2: ffff888080ab1d28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap kernel/fork.c:508 [inline]
 #2: ffff888080ab1d28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mm+0x18a/0x13e0 kernel/fork.c:1453
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: dup_mmap kernel/fork.c:577 [inline]
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: dup_mm+0x761/0x13e0 kernel/fork.c:1453
1 lock held by syz-executor.5/6706:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
4 locks held by syz-executor.4/7136:
 #0: ffffffff8ba524f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap kernel/fork.c:498 [inline]
 #0: ffffffff8ba524f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm+0x108/0x13e0 kernel/fork.c:1453
 #1: ffff88801dda3928 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #1: ffff88801dda3928 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mmap kernel/fork.c:499 [inline]
 #1: ffff88801dda3928 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mm+0x12e/0x13e0 kernel/fork.c:1453
 #2: ffff88801986e328 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:78 [inline]
 #2: ffff88801986e328 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap kernel/fork.c:508 [inline]
 #2: ffff88801986e328 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mm+0x18a/0x13e0 kernel/fork.c:1453
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: dup_mmap kernel/fork.c:577 [inline]
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: dup_mm+0x761/0x13e0 kernel/fork.c:1453
4 locks held by syz-executor.5/7461:
 #0: ffffffff8ba524f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mmap kernel/fork.c:498 [inline]
 #0: ffffffff8ba524f0 (dup_mmap_sem){.+.+}-{0:0}, at: dup_mm+0x108/0x13e0 kernel/fork.c:1453
 #1: ffff8880760e1628 (&mm->mmap_lock#2){++++}-{3:3}, at: mmap_write_lock_killable include/linux/mmap_lock.h:87 [inline]
 #1: ffff8880760e1628 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mmap kernel/fork.c:499 [inline]
 #1: ffff8880760e1628 (&mm->mmap_lock#2){++++}-{3:3}, at: dup_mm+0x12e/0x13e0 kernel/fork.c:1453
 #2: ffff888080ab2b28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: mmap_write_lock_nested include/linux/mmap_lock.h:78 [inline]
 #2: ffff888080ab2b28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mmap kernel/fork.c:508 [inline]
 #2: ffff888080ab2b28 (&mm->mmap_lock/1){+.+.}-{3:3}, at: dup_mm+0x18a/0x13e0 kernel/fork.c:1453
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: dup_mmap kernel/fork.c:577 [inline]
 #3: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: dup_mm+0x761/0x13e0 kernel/fork.c:1453
1 lock held by syz-executor.3/15556:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.3/15569:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.4/15572:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.0/15583:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
6 locks held by syz-executor.5/15579:
1 lock held by syz-executor.3/15588:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169
1 lock held by syz-executor.2/15589:
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: i_mmap_lock_write include/linux/fs.h:501 [inline]
 #0: ffff888145aa97e8 (&mapping->i_mmap_rwsem){++++}-{3:3}, at: unlink_file_vma+0x7d/0x110 mm/mmap.c:169

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

NMI backtrace for cpu 0
CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105
 nmi_trigger_cpumask_backtrace+0x1ae/0x220 lib/nmi_backtrace.c:62
 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
 check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline]
 watchdog+0xc1d/0xf50 kernel/hung_task.c:295
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 15579 Comm: syz-executor.5 Not tainted 5.15.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:match_held_lock+0xe/0xc0 kernel/locking/lockdep.c:5077
Code: 48 c7 c7 20 fb 8b 89 e8 5a 1c be ff e8 e0 e3 cc ff 31 c0 5d c3 0f 1f 80 00 00 00 00 53 48 89 fb 48 83 ec 08 48 39 77 10 74 6a <66> f7 47 22 f0 ff 74 5a 48 8b 46 08 48 89 f7 48 85 c0 74 42 8b 15
RSP: 0018:ffffc90000dc08d8 EFLAGS: 00000083
RAX: 0000000000000014 RBX: ffff8880303ec398 RCX: 0000000000000001
RDX: 0000000000000000 RSI: ffffffff8b97fd60 RDI: ffff8880303ec398
RBP: ffffffff8b97fd60 R08: 0000000000000000 R09: ffff8880b9d32a0b
R10: ffffed10173a6541 R11: 0000000000000000 R12: ffff8880303eb900
R13: ffff8880303ec2f8 R14: 00000000ffffffff R15: ffff8880303ec398
FS:  00007fadb9d74700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fc671c84000 CR3: 000000003ff0e000 CR4: 00000000001526e0
Call Trace:
 <IRQ>
 __lock_is_held kernel/locking/lockdep.c:5368 [inline]
 lock_is_held_type+0xa7/0x140 kernel/locking/lockdep.c:5668
 lock_is_held include/linux/lockdep.h:283 [inline]
 rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125
 trace_lock_release include/trace/events/lock.h:58 [inline]
 lock_release+0x522/0x720 kernel/locking/lockdep.c:5636
 seqcount_lockdep_reader_access include/linux/seqlock.h:104 [inline]
 ktime_get+0x8d/0x470 kernel/time/timekeeping.c:827
 clockevents_program_event+0x141/0x370 kernel/time/clockevents.c:326
 tick_program_event+0xac/0x140 kernel/time/tick-oneshot.c:44
 hrtimer_interrupt+0x36e/0x790 kernel/time/hrtimer.c:1824
 local_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1086 [inline]
 __sysvec_apic_timer_interrupt+0x146/0x530 arch/x86/kernel/apic/apic.c:1103
 sysvec_apic_timer_interrupt+0x40/0xc0 arch/x86/kernel/apic/apic.c:1097
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:check_kcov_mode kernel/kcov.c:163 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x7/0x60 kernel/kcov.c:197
Code: fd ff ff b9 ff ff ff ff ba 08 00 00 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 19 e2 8b 7e <89> c1 48 8b 34 24 81 e1 00 01 00 00 65 48 8b 14 25 40 f0 01 00 a9
RSP: 0018:ffffc90000dc0c48 EFLAGS: 00000202
RAX: 0000000080000102 RBX: ffff8880572213b0 RCX: ffff8880303eb900
RDX: 0000000000000000 RSI: ffff8880303eb900 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000001
R10: ffffffff87513568 R11: 0000000000000000 R12: fffffff0a3da8872
R13: ffff88801cfa5b00 R14: 0000000000000000 R15: 0000000000000001
 pie_calculate_probability+0x382/0x7c0 net/sched/sch_pie.c:400
 fq_pie_timer+0x170/0x2a0 net/sched/sch_fq_pie.c:383
 call_timer_fn+0x1a5/0x6b0 kernel/time/timer.c:1421
 expire_timers kernel/time/timer.c:1466 [inline]
 __run_timers.part.0+0x675/0xa20 kernel/time/timer.c:1734
 __run_timers kernel/time/timer.c:1715 [inline]
 run_timer_softirq+0xb3/0x1d0 kernel/time/timer.c:1747
 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558
 invoke_softirq kernel/softirq.c:432 [inline]
 __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636
 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648
 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097
 </IRQ>
 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638
RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x13/0x60 kernel/kcov.c:196
Code: 00 4d 8b 03 48 0f bd ca 49 8b 45 00 48 63 c9 e9 64 ff ff ff 0f 1f 00 65 8b 05 19 e2 8b 7e 89 c1 48 8b 34 24 81 e1 00 01 00 00 <65> 48 8b 14 25 40 f0 01 00 a9 00 01 ff 00 74 0e 85 c9 74 35 8b 82
RSP: 0018:ffffc90009b4f900 EFLAGS: 00000246
RAX: 0000000080000001 RBX: ffffea0001412d00 RCX: 0000000000000000
RDX: ffff8880303eb900 RSI: ffffffff81ab874c RDI: 0000000000000003
RBP: ffffea0001412d00 R08: 0000000000000000 R09: 0000000000000000
R10: ffffffff81ab8736 R11: 0000000000000000 R12: ffffea0001412d08
R13: 0000000000000000 R14: dffffc0000000000 R15: 00007fe42bed8000
 PageSwapBacked include/linux/page-flags.h:362 [inline]
 mm_counter_file include/linux/mm.h:1959 [inline]
 mm_counter include/linux/mm.h:1968 [inline]
 zap_pte_range mm/memory.c:1361 [inline]
 zap_pmd_range mm/memory.c:1481 [inline]
 zap_pud_range mm/memory.c:1510 [inline]
 zap_p4d_range mm/memory.c:1531 [inline]
 unmap_page_range+0xe4c/0x2a10 mm/memory.c:1552
 unmap_single_vma+0x198/0x310 mm/memory.c:1597
 zap_page_range_single+0x2ca/0x430 mm/memory.c:1680
 unmap_mapping_range_vma mm/memory.c:3320 [inline]
 unmap_mapping_range_tree mm/memory.c:3341 [inline]
 unmap_mapping_pages+0x22b/0x2b0 mm/memory.c:3403
 truncate_pagecache+0x51/0x90 mm/truncate.c:734
 simple_setattr+0xed/0x110 fs/libfs.c:508
 debugfs_setattr+0x7b/0xa0 fs/debugfs/inode.c:55
 notify_change+0xaef/0x10c0 fs/attr.c:410
 do_truncate+0x13c/0x200 fs/open.c:64
 do_sys_ftruncate+0x544/0x740 fs/open.c:192
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fadb9d74188 EFLAGS: 00000246 ORIG_RAX: 000000000000004d
RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665f9
RDX: 0000000000000000 RSI: 0000000000008979 RDI: 0000000000000000
RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80
R13: 0000000000a9fb1f R14: 00007fadb9d74300 R15: 0000000000022000
----------------
Code disassembly (best guess):
   0:	48 c7 c7 20 fb 8b 89 	mov    $0xffffffff898bfb20,%rdi
   7:	e8 5a 1c be ff       	callq  0xffbe1c66
   c:	e8 e0 e3 cc ff       	callq  0xffcce3f1
  11:	31 c0                	xor    %eax,%eax
  13:	5d                   	pop    %rbp
  14:	c3                   	retq
  15:	0f 1f 80 00 00 00 00 	nopl   0x0(%rax)
  1c:	53                   	push   %rbx
  1d:	48 89 fb             	mov    %rdi,%rbx
  20:	48 83 ec 08          	sub    $0x8,%rsp
  24:	48 39 77 10          	cmp    %rsi,0x10(%rdi)
  28:	74 6a                	je     0x94
* 2a:	66 f7 47 22 f0 ff    	testw  $0xfff0,0x22(%rdi) <-- trapping instruction
  30:	74 5a                	je     0x8c
  32:	48 8b 46 08          	mov    0x8(%rsi),%rax
  36:	48 89 f7             	mov    %rsi,%rdi
  39:	48 85 c0             	test   %rax,%rax
  3c:	74 42                	je     0x80
  3e:	8b                   	.byte 0x8b
  3f:	15                   	.byte 0x15

Crashes (7):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce 2021/09/13 11:09 upstream 6880fa6c5660 3ce60af8 .config log report info INFO: task hung in dup_mm
ci-upstream-kasan-gce-386 2021/11/03 02:52 upstream bfc484fe6abb 17f3edd2 .config log report info INFO: task hung in dup_mm
ci-upstream-kasan-gce-386 2021/07/19 08:10 upstream 2734d6c1b1a0 f115ae98 .config log report info INFO: task hung in dup_mm
ci-upstream-kasan-gce-386 2021/06/28 17:12 upstream 62fb9874f5da 9d2ab5df .config log report info INFO: task hung in dup_mm
ci-upstream-linux-next-kasan-gce-root 2021/11/19 10:28 linux-next 5191249f8803 31a30fc0 .config log report info INFO: task hung in dup_mm
ci-upstream-linux-next-kasan-gce-root 2021/09/22 07:23 linux-next e90f9946ba28 169724fe .config log report info INFO: task hung in dup_mm
ci-upstream-linux-next-kasan-gce-root 2021/09/17 13:05 linux-next 9004fd387338 5b989942 .config log report info INFO: task hung in dup_mm
* Struck through repros no longer work on HEAD.