INFO: task syz-executor.2:9561 blocked for more than 143 seconds.
Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:27536 pid:9561 tgid:9552 ppid:9191 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:830 [inline]
do_unlinkat+0x26a/0x830 fs/namei.c:4386
__do_sys_unlink fs/namei.c:4447 [inline]
__se_sys_unlink fs/namei.c:4445 [inline]
__x64_sys_unlink+0x49/0x60 fs/namei.c:4445
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f987f47dea9
RSP: 002b:00007f988017c0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007f987f5ac050 RCX: 00007f987f47dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000000
RBP: 00007f987f4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f987f5ac050 R15: 00007ffd54e47408
INFO: task syz-executor.2:9563 blocked for more than 144 seconds.
Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:26672 pid:9563 tgid:9552 ppid:9191 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1708
walk_component+0x2e1/0x410 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2485
filename_lookup+0x256/0x610 fs/namei.c:2514
vfs_statx+0x105/0x4e0 fs/stat.c:244
vfs_fstatat fs/stat.c:304 [inline]
vfs_lstat include/linux/fs.h:3267 [inline]
__do_sys_newlstat fs/stat.c:454 [inline]
__se_sys_newlstat fs/stat.c:448 [inline]
__x64_sys_newlstat+0xf5/0x180 fs/stat.c:448
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f987f47dea9
RSP: 002b:00007f988015b0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000006
RAX: ffffffffffffffda RBX: 00007f987f5ac120 RCX: 00007f987f47dea9
RDX: 0000000000000000 RSI: 00000000200000c0 RDI: 0000000020000080
RBP: 00007f987f4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f987f5ac120 R15: 00007ffd54e47408
INFO: task syz-executor.2:9568 blocked for more than 144 seconds.
Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28784 pid:9568 tgid:9552 ppid:9191 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath kernel/locking/rwsem.c:1086 [inline]
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x705/0xa40 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow+0x45/0x70 fs/namei.c:1708
walk_component+0x2e1/0x410 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2485
filename_lookup+0x256/0x610 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
do_fchownat+0xf0/0x250 fs/open.c:815
__do_sys_fchownat fs/open.c:836 [inline]
__se_sys_fchownat fs/open.c:833 [inline]
__x64_sys_fchownat+0xb5/0xd0 fs/open.c:833
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f987f47dea9
RSP: 002b:00007f988013a0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000104
RAX: ffffffffffffffda RBX: 00007f987f5ac1f0 RCX: 00007f987f47dea9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007f987f4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f987f5ac1f0 R15: 00007ffd54e47408
INFO: task syz-executor.2:9570 blocked for more than 145 seconds.
Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.2 state:D stack:28920 pid:9570 tgid:9552 ppid:9191 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0x1796/0x4a00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0x14b/0x320 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_write_slowpath+0xeeb/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1af/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:830 [inline]
do_rmdir+0x263/0x580 fs/namei.c:4253
__do_sys_rmdir fs/namei.c:4284 [inline]
__se_sys_rmdir fs/namei.c:4282 [inline]
__x64_sys_rmdir+0x49/0x60 fs/namei.c:4282
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f987f47dea9
RSP: 002b:00007f987efff0c8 EFLAGS: 00000246 ORIG_RAX: 0000000000000054
RAX: ffffffffffffffda RBX: 00007f987f5ac390 RCX: 00007f987f47dea9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 00007f987f4ca4a4 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f987f5ac390 R15: 00007ffd54e47408
Showing all locks held in the system:
1 lock held by pool_workqueue_/3:
#0: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x39a/0x820 kernel/rcu/tree_exp.h:939
2 locks held by kworker/u8:0/10:
1 lock held by khungtaskd/29:
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8e334d20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by getty/4821:
#0: ffff88802af5c0a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f0e2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b5/0x1e10 drivers/tty/n_tty.c:2201
3 locks held by udevd/8168:
2 locks held by syz-executor.2/9553:
2 locks held by syz-executor.2/9561:
#0: ffff88807d16e420 (sb_writers#36){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88807ed88188 (&type->i_mutex_dir_key#25/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88807ed88188 (&type->i_mutex_dir_key#25/1){+.+.}-{3:3}, at: do_unlinkat+0x26a/0x830 fs/namei.c:4386
1 lock held by syz-executor.2/9563:
#0: ffff88807ed88188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88807ed88188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
1 lock held by syz-executor.2/9568:
#0: ffff88807ed88188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff88807ed88188 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1708
2 locks held by syz-executor.2/9570:
#0: ffff88807d16e420 (sb_writers#36){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88807ed88188 (&type->i_mutex_dir_key#25/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:830 [inline]
#1: ffff88807ed88188 (&type->i_mutex_dir_key#25/1){+.+.}-{3:3}, at: do_rmdir+0x263/0x580 fs/namei.c:4253
1 lock held by syz-executor.3/11562:
#0: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:323 [inline]
#0: ffffffff8e33a0b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x463/0x820 kernel/rcu/tree_exp.h:939
1 lock held by syz-executor.0/11570:
2 locks held by syz-executor.1/11572:
1 lock held by udevadm/11573:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x241/0x360 lib/dump_stack.c:114
nmi_cpu_backtrace+0x49c/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x320 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xfde/0x1020 kernel/hung_task.c:380
kthread+0x2f0/0x390 kernel/kthread.c:388
ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 4525 Comm: udevd Not tainted 6.9.0-rc5-syzkaller-00036-g9d1ddab261f3 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
RIP: 0010:seqcount_lockdep_reader_access+0x18f/0x220 include/linux/seqlock.h:74
Code: 3c 3b 00 74 08 4c 89 ef e8 8e 22 df ff 48 c7 44 24 20 00 00 00 00 9c 8f 44 24 20 42 80 3c 3b 00 74 08 4c 89 ef e8 81 21 df ff <4c> 8b 7c 24 20 bb 00 02 00 00 be 00 02 00 00 4c 21 fe 31 ff e8 e8
RSP: 0018:ffffc9000402f2e0 EFLAGS: 00000046
RAX: d5cf888805662a00 RBX: 1ffff92000805e60 RCX: ffffffff8172ecea
RDX: dffffc0000000000 RSI: ffffffff8bcab8a0 RDI: ffffffff8c1ec360
RBP: ffffc9000402f390 R08: ffffffff92f0053f R09: 1ffffffff25e00a7
R10: dffffc0000000000 R11: fffffbfff25e00a8 R12: 1ffff92000805e5c
R13: ffffc9000402f300 R14: 0000000000000200 R15: dffffc0000000000
FS: 00007f780e0c9c80(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fffc101dee8 CR3: 000000007b9d8000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
read_seqbegin include/linux/seqlock.h:772 [inline]
read_seqbegin_or_lock include/linux/seqlock.h:1076 [inline]
prepend_path+0xe1/0xbe0 fs/d_path.c:166
d_absolute_path+0x179/0x310 fs/d_path.c:234
tomoyo_get_absolute_path security/tomoyo/realpath.c:101 [inline]
tomoyo_realpath_from_path+0x2b4/0x5e0 security/tomoyo/realpath.c:271
tomoyo_get_realpath security/tomoyo/file.c:151 [inline]
tomoyo_check_open_permission+0x255/0x500 security/tomoyo/file.c:771
security_file_open+0x69/0x570 security/security.c:2961
do_dentry_open+0x327/0x15a0 fs/open.c:942
do_open fs/namei.c:3642 [inline]
path_openat+0x2860/0x3240 fs/namei.c:3799
do_filp_open+0x235/0x490 fs/namei.c:3826
do_sys_openat2+0x13e/0x1d0 fs/open.c:1406
do_sys_open fs/open.c:1421 [inline]
__do_sys_openat fs/open.c:1437 [inline]
__se_sys_openat fs/open.c:1432 [inline]
__x64_sys_openat+0x247/0x2a0 fs/open.c:1432
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x240 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f780e19f9a4
Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83
RSP: 002b:00007fffc1024d00 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007fffc1024fe8 RCX: 00007f780e19f9a4
RDX: 0000000000080141 RSI: 0000562ef4a280d8 RDI: 00000000ffffff9c
RBP: 0000562ef4a280d8 R08: 00000000ffffffff R09: 0000000000000000
R10: 00000000000001a4 R11: 0000000000000246 R12: 0000000000080141
R13: ffffffffffffffff R14: 00000000ffffffff R15: 00000000ffffffff