INFO: task syz-executor.1:6525 blocked for more than 143 seconds.
Not tainted 6.9.0-rc7-syzkaller-00023-g6d7ddd805123 #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.1 state:D stack:25728 pid:6525 tgid:6522 ppid:5090 flags:0x00000006
Call Trace:
context_switch kernel/sched/core.c:5409 [inline]
__schedule+0xf15/0x5d00 kernel/sched/core.c:6746
__schedule_loop kernel/sched/core.c:6823 [inline]
schedule+0xe7/0x350 kernel/sched/core.c:6838
schedule_preempt_disabled+0x13/0x30 kernel/sched/core.c:6895
rwsem_down_read_slowpath+0x61e/0xb20 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0x124/0x330 kernel/locking/rwsem.c:1528
inode_lock_shared include/linux/fs.h:805 [inline]
lookup_slow fs/namei.c:1708 [inline]
walk_component+0x342/0x5b0 fs/namei.c:2004
lookup_last fs/namei.c:2461 [inline]
path_lookupat+0x17f/0x770 fs/namei.c:2485
filename_lookup+0x1e5/0x5b0 fs/namei.c:2514
user_path_at_empty+0x42/0x60 fs/namei.c:2921
user_path_at include/linux/namei.h:57 [inline]
do_mount fs/namespace.c:3689 [inline]
__do_sys_mount fs/namespace.c:3898 [inline]
__se_sys_mount fs/namespace.c:3875 [inline]
__x64_sys_mount+0x1ff/0x320 fs/namespace.c:3875
do_syscall_x64 arch/x86/entry/common.c:52 [inline]
do_syscall_64+0xcf/0x260 arch/x86/entry/common.c:83
entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fe71787dd69
RSP: 002b:00007fe7173ff0c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007fe7179ac120 RCX: 00007fe71787dd69
RDX: 0000000020000140 RSI: 0000000020000100 RDI: 0000000000000000
RBP: 00007fe7178ca49e R08: 0000000020000200 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007fe7179ac120 R15: 00007ffe01e3b528
Showing all locks held in the system:
2 locks held by kworker/u8:1/11:
1 lock held by khungtaskd/29:
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire include/linux/rcupdate.h:329 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: rcu_read_lock include/linux/rcupdate.h:781 [inline]
#0: ffffffff8d7b0e20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x75/0x340 kernel/locking/lockdep.c:6614
2 locks held by getty/4830:
#0: ffff88802a6e30a0 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x24/0x80 drivers/tty/tty_ldisc.c:243
#1: ffffc90002efe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xfc8/0x1490 drivers/tty/n_tty.c:2201
2 locks held by syz-executor.2/6425:
1 lock held by syz-executor.1/6525:
#0: ffff8880580e4188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff8880580e4188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff8880580e4188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
3 locks held by syz-executor.1/6527:
2 locks held by syz-executor.4/6821:
1 lock held by syz-executor.4/6823:
#0: ffff888040e40188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: inode_lock_shared include/linux/fs.h:805 [inline]
#0: ffff888040e40188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: lookup_slow fs/namei.c:1708 [inline]
#0: ffff888040e40188 (&type->i_mutex_dir_key#17){.+.+}-{3:3}, at: walk_component+0x342/0x5b0 fs/namei.c:2004
5 locks held by syz-executor.4/6996:
1 lock held by syz-executor.3/7711:
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:291 [inline]
#0: ffffffff8d7bc538 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x682/0x7a0 kernel/rcu/tree_exp.h:939
2 locks held by syz-executor.2/7925:
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 29 Comm: khungtaskd Not tainted 6.9.0-rc7-syzkaller-00023-g6d7ddd805123 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:114
nmi_cpu_backtrace+0x27b/0x390 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x29c/0x300 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:160 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:223 [inline]
watchdog+0xf86/0x1240 kernel/hung_task.c:380
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 5148 Comm: kworker/0:5 Not tainted 6.9.0-rc7-syzkaller-00023-g6d7ddd805123 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Workqueue: events bpf_prog_free_deferred
RIP: 0010:_find_first_zero_bit+0x48/0xb0 lib/find_bit.c:125
Code: f7 0e fd 4d 85 ed 74 69 49 be 00 00 00 00 00 fc ff df 45 31 e4 eb 1d e8 c6 fc 0e fd 49 83 c4 40 4c 89 ee 48 83 c5 08 4c 89 e7 03 f7 0e fd 4d 39 ec 73 3d e8 a9 fc 0e fd 48 89 e8 48 c1 e8 03
RSP: 0018:ffffc90003ff76f0 EFLAGS: 00000082
RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff847ed066
RDX: ffff8880177bda00 RSI: 0000000000020000 RDI: 0000000000004dc0
RBP: ffffffff93f76058 R08: 0000000000000007 R09: 0000000000000000
R10: 0000000000000000 R11: ffffffff934b4588 R12: 0000000000004dc0
R13: 0000000000020000 R14: dffffc0000000000 R15: ffffffff93e83130
FS: 0000000000000000(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f031b97b978 CR3: 000000006bc86000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
find_first_zero_bit include/linux/find.h:366 [inline]
alloc_list_entry kernel/locking/lockdep.c:1389 [inline]
add_lock_to_list+0x32/0x380 kernel/locking/lockdep.c:1418
check_prev_add kernel/locking/lockdep.c:3204 [inline]
check_prevs_add kernel/locking/lockdep.c:3253 [inline]
validate_chain kernel/locking/lockdep.c:3869 [inline]
__lock_acquire+0x2c61/0x3b30 kernel/locking/lockdep.c:5137
lock_acquire kernel/locking/lockdep.c:5754 [inline]
lock_acquire+0x1b1/0x560 kernel/locking/lockdep.c:5719
__raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline]
_raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154
__mutex_lock_common kernel/locking/mutex.c:622 [inline]
__mutex_lock+0x264/0x9c0 kernel/locking/mutex.c:752
_vm_unmap_aliases+0xc9/0xbd0 mm/vmalloc.c:2804
vm_reset_perms mm/vmalloc.c:3251 [inline]
vfree+0x533/0x7a0 mm/vmalloc.c:3330
bpf_prog_unlock_free include/linux/filter.h:930 [inline]
bpf_jit_free include/linux/filter.h:1219 [inline]
bpf_prog_free_deferred+0x466/0x630 kernel/bpf/core.c:2783
process_one_work+0x9a9/0x1ac0 kernel/workqueue.c:3267
process_scheduled_works kernel/workqueue.c:3348 [inline]
worker_thread+0x6c8/0xf70 kernel/workqueue.c:3429
kthread+0x2c1/0x3a0 kernel/kthread.c:388
ret_from_fork+0x45/0x80 arch/x86/kernel/process.c:147
ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244