INFO: task syz-executor.1:32133 blocked for more than 143 seconds.
Not tainted 6.7.0-syzkaller-12377-g9d1694dc91ce #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:26096 pid:32133 tgid:32132 ppid:5083 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
request_wait_answer fs/fuse/dev.c:407 [inline]
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x1192/0x1b80 fs/fuse/dev.c:513
fuse_dentry_revalidate+0x524/0xbc0 fs/fuse/dir.c:233
d_revalidate fs/namei.c:862 [inline]
__lookup_slow+0x1b7/0x3e0 fs/namei.c:1682
lookup_slow+0x53/0x70 fs/namei.c:1710
walk_component+0x2d0/0x400 fs/namei.c:2001
lookup_last fs/namei.c:2458 [inline]
path_lookupat+0x16f/0x450 fs/namei.c:2482
filename_lookup+0x255/0x610 fs/namei.c:2511
vfs_statx+0x105/0x4e0 fs/stat.c:244
do_statx fs/stat.c:681 [inline]
__do_sys_statx fs/stat.c:708 [inline]
__se_sys_statx fs/stat.c:699 [inline]
__x64_sys_statx+0x1a4/0x240 fs/stat.c:699
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa6bf07cda9
RSP: 002b:00007fa6bfdf70c8 EFLAGS: 00000246 ORIG_RAX: 000000000000014c
RAX: ffffffffffffffda RBX: 00007fa6bf1abf80 RCX: 00007fa6bf07cda9
RDX: 0000000000000000 RSI: 0000000020000000 RDI: ffffffffffffff9c
RBP: 00007fa6bf0c947a R08: 00000000200065c0 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000000b R14: 00007fa6bf1abf80 R15: 00007ffd5096ba88
INFO: task syz-executor.1:32139 blocked for more than 143 seconds.
Not tainted 6.7.0-syzkaller-12377-g9d1694dc91ce #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25072 pid:32139 tgid:32132 ppid:5083 flags:0x00004006
Call Trace:
context_switch kernel/sched/core.c:5400 [inline]
__schedule+0x177f/0x4960 kernel/sched/core.c:6727
__schedule_loop kernel/sched/core.c:6802 [inline]
schedule+0x149/0x260 kernel/sched/core.c:6817
schedule_preempt_disabled+0x13/0x20 kernel/sched/core.c:6874
rwsem_down_write_slowpath+0xeea/0x13b0 kernel/locking/rwsem.c:1178
__down_write_common+0x1aa/0x200 kernel/locking/rwsem.c:1306
inode_lock_nested include/linux/fs.h:837 [inline]
filename_create+0x260/0x530 fs/namei.c:3891
do_mkdirat+0xbd/0x3a0 fs/namei.c:4137
__do_sys_mkdirat fs/namei.c:4160 [inline]
__se_sys_mkdirat fs/namei.c:4158 [inline]
__x64_sys_mkdirat+0x89/0xa0 fs/namei.c:4158
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fa6bf07b8a7
RSP: 002b:00007fa6bfdb4ef8 EFLAGS: 00000202 ORIG_RAX: 0000000000000102
RAX: ffffffffffffffda RBX: 00007fa6bfdb4f80 RCX: 00007fa6bf07b8a7
RDX: 00000000000001ff RSI: 0000000020000140 RDI: 00000000ffffff9c
RBP: 0000000020000200 R08: 0000000000000000 R09: 00000000000001c5
R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000140
R13: 00007fa6bfdb4f40 R14: 00000000000001cb R15: 0000000020000500
Showing all locks held in the system:
1 lock held by khungtaskd/29:
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:298 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:750 [inline]
#0: ffffffff8d92ef20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x55/0x2a0 kernel/locking/lockdep.c:6614
2 locks held by udevd/4501:
2 locks held by getty/4800:
#0: ffff88807b5980a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x25/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc90002f062f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b4/0x1e10 drivers/tty/n_tty.c:2201
2 locks held by syz-fuzzer/5071:
1 lock held by syz-executor.4/5073:
2 locks held by kworker/1:6/5137:
#0: ffff888012c8a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#0: ffff888012c8a938 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
#1: ffffc900049a7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_one_work kernel/workqueue.c:2608 [inline]
#1: ffffc900049a7d20 ((work_completion)(&rew->rew_work)){+.+.}-{0:0}, at: process_scheduled_works+0x825/0x1420 kernel/workqueue.c:2706
1 lock held by syz-executor.0/12039:
#0: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:293 [inline]
#0: ffffffff8d9348b8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x3a3/0x890 kernel/rcu/tree_exp.h:996
2 locks held by kworker/u4:2/28749:
1 lock held by syz-executor.1/32133:
#0: ffff88805acdd250 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88805acdd250 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.1/32139:
#0: ffff88804fcf6420 (sb_writers#38){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805acdd250 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88805acdd250 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3891
1 lock held by syz-executor.1/403:
#0: ffff88805af45fd0 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88805af45fd0 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.1/404:
#0: ffff88805c504420 (sb_writers#38){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805af45fd0 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88805af45fd0 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3891
1 lock held by syz-executor.1/682:
#0: ffff88805acddfd0 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:812 [inline]
#0: ffff88805acddfd0 (&type->i_mutex_dir_key#26){++++}-{3:3}, at: lookup_slow+0x45/0x70 fs/namei.c:1709
2 locks held by syz-executor.1/684:
#0: ffff88801dd92420 (sb_writers#38){.+.+}-{0:0}, at: mnt_want_write+0x3f/0x90 fs/namespace.c:409
#1: ffff88805acddfd0 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:837 [inline]
#1: ffff88805acddfd0 (&type->i_mutex_dir_key#26/1){+.+.}-{3:3}, at: filename_create+0x260/0x530 fs/namei.c:3891
2 locks held by syz-executor.5/693:
1 lock held by udevd/704:
#0: ffff88801b09e540 (mapping.invalidate_lock#2){++++}-{3:3}, at: filemap_invalidate_lock_shared include/linux/fs.h:857 [inline]
#0: ffff88801b09e540 (mapping.invalidate_lock#2){++++}-{3:3}, at: page_cache_ra_unbounded+0xf1/0x7c0 mm/readahead.c:225
1 lock held by syz-executor.4/710:
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 29 Comm: khungtaskd Not tainted 6.7.0-syzkaller-12377-g9d1694dc91ce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x1e7/0x2d0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x498/0x4d0 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x198/0x310 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0xfaf/0xff0 kernel/hung_task.c:379
kthread+0x2d3/0x370 kernel/kthread.c:388
ret_from_fork+0x48/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x11/0x20 arch/x86/entry/entry_64.S:242
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 708 Comm: syz-executor.3 Not tainted 6.7.0-syzkaller-12377-g9d1694dc91ce #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
RIP: 0010:check_kcov_mode kernel/kcov.c:184 [inline]
RIP: 0010:__sanitizer_cov_trace_pc+0x36/0x60 kernel/kcov.c:207
Code: 20 c5 74 7e 65 8b 15 21 c5 74 7e f7 c2 00 01 ff 00 74 11 f7 c2 00 01 00 00 74 35 83 b9 fc 15 00 00 00 74 2c 8b 91 d8 15 00 00 <83> fa 02 75 21 48 8b 91 e0 15 00 00 48 8b 32 48 8d 7e 01 8b 89 dc
RSP: 0018:ffffc9000dc3f9d8 EFLAGS: 00040246
RAX: ffffffff81d2ec0b RBX: 00007f76e3a98000 RCX: ffff888016ba0000
RDX: 0000000000000002 RSI: 000000000003ffff RDI: 0000000000040000
RBP: ffffc9000dc3fa98 R08: ffffffff81d2eba8 R09: ffffffff84888969
R10: 0000000000000002 R11: ffff888016ba0000 R12: 0000000000001000
R13: dffffc0000000000 R14: 00007f76e3a99000 R15: 1ffff92001b87f44
FS: 00007f76edf756c0(0000) GS:ffff8880b9900000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000000c0000ff000 CR3: 000000006e3d0000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
fault_in_readable+0x15b/0x2b0 mm/gup.c:1994
fault_in_iov_iter_readable+0x229/0x280 lib/iov_iter.c:94
generic_perform_write+0x220/0x630 mm/filemap.c:3918
shmem_file_write_iter+0xfc/0x120 mm/shmem.c:2893
call_write_iter include/linux/fs.h:2085 [inline]
new_sync_write fs/read_write.c:497 [inline]
vfs_write+0xa74/0xca0 fs/read_write.c:590
ksys_write+0x1a0/0x2c0 fs/read_write.c:643
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xf5/0x230 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7f76ed27baef
Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 b9 80 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 0c 81 02 00 48
RSP: 002b:00007f76edf74e80 EFLAGS: 00000293 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 0000000001000000 RCX: 00007f76ed27baef
RDX: 0000000001000000 RSI: 00007f76e3600000 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: 00000000000095cb
R10: 0000000000000002 R11: 0000000000000293 R12: 0000000000000003
R13: 00007f76edf74f80 R14: 00007f76edf74f40 R15: 00007f76e3600000