ci starts bisection 2023-05-22 15:25:17.141318554 +0000 UTC m=+195639.483213621
bisecting fixing commit since e01d50cbd6eece456843717a566a34e8b926cf0c
building syzkaller on 97de9cfcb0b25b95878e2eaaf3652a2faa8dd8f4
ensuring issue is reproducible on original commit e01d50cbd6eece456843717a566a34e8b926cf0c
testing commit e01d50cbd6eece456843717a566a34e8b926cf0c gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 9e69c2d3b3e2e931acc198c9e5d7f937ebc6cbf9f0149c4891232168b0eac638
all runs: crashed: INFO: task hung in walk_component
testing current HEAD 44c026a73be8038f03dbdeef028b642880cf1511
testing commit 44c026a73be8038f03dbdeef028b642880cf1511 gcc
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: fb968e371489f664cdbbf5626f107082fb16efefd8acd057c5ebe3066844916f
all runs: crashed: INFO: task hung in walk_component
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 27m48.029214926s (build: 13m54.410731326s, test: 13m7.189892546s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 6.4-rc3
crash: INFO: task hung in walk_component
INFO: task syz-executor.0:5234 blocked for more than 143 seconds.
Not tainted 6.4.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:24680 pid:5234 ppid:1 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc25/0x57f0 kernel/sched/core.c:6669
schedule+0xda/0x1a0 kernel/sched/core.c:6745
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6804
rwsem_down_read_slowpath+0x578/0xad0 kernel/locking/rwsem.c:1086
__down_read_common kernel/locking/rwsem.c:1250 [inline]
__down_read kernel/locking/rwsem.c:1263 [inline]
down_read+0xec/0x470 kernel/locking/rwsem.c:1522
inode_lock_shared include/linux/fs.h:785 [inline]
lookup_slow fs/namei.c:1706 [inline]
walk_component+0x296/0x4e0 fs/namei.c:1998
link_path_walk.part.0+0x568/0xac0 fs/namei.c:2325
link_path_walk fs/namei.c:2250 [inline]
path_openat+0x1f8/0x2280 fs/namei.c:3787
do_filp_open+0x1a5/0x3d0 fs/namei.c:3818
do_sys_openat2+0x11e/0x3f0 fs/open.c:1356
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x11b/0x1d0 fs/open.c:1383
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+0x63/0xcd
RIP: 0033:0x7f193cc8b178
RSP: 002b:00007ffd96bfb510 EFLAGS: 00000287 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f193cc8b178
RDX: 0000000000090800 RSI: 00007f193cce5bd2 RDI: 00000000ffffff9c
RBP: 00007ffd96bfb5dc R08: 0000000000090800 R09: 00007f193cce5bd2
R10: 0000000000000000 R11: 0000000000000287 R12: 0000000000000000
R13: 000000000000efc2 R14: 0000000000000009 R15: 00007ffd96bfb640
INFO: task syz-executor.0:5382 blocked for more than 143 seconds.
Not tainted 6.4.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26536 pid:5382 ppid:5234 flags:0x00004004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc25/0x57f0 kernel/sched/core.c:6669
schedule+0xda/0x1a0 kernel/sched/core.c:6745
request_wait_answer+0x371/0x6b0 fs/fuse/dev.c:407
__fuse_request_send fs/fuse/dev.c:426 [inline]
fuse_simple_request+0x422/0xb70 fs/fuse/dev.c:513
fuse_lookup_name+0x255/0x5d0 fs/fuse/dir.c:392
fuse_lookup.part.0+0xd6/0x2c0 fs/fuse/dir.c:433
__lookup_slow+0x200/0x3f0 fs/namei.c:1690
lookup_slow fs/namei.c:1707 [inline]
walk_component+0x2a3/0x4e0 fs/namei.c:1998
link_path_walk.part.0+0x568/0xac0 fs/namei.c:2325
link_path_walk fs/namei.c:2250 [inline]
path_openat+0x1f8/0x2280 fs/namei.c:3787
do_filp_open+0x1a5/0x3d0 fs/namei.c:3818
do_sys_openat2+0x11e/0x3f0 fs/open.c:1356
do_sys_open fs/open.c:1372 [inline]
__do_sys_openat fs/open.c:1388 [inline]
__se_sys_openat fs/open.c:1383 [inline]
__x64_sys_openat+0x11b/0x1d0 fs/open.c:1383
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+0x63/0xcd
RIP: 0033:0x7f193cc3d6e4
RSP: 002b:00007f193d8fcca0 EFLAGS: 00000293 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 6666666666666667 RCX: 00007f193cc3d6e4
RDX: 0000000000004000 RSI: 00007f193d8fcd40 RDI: 00000000ffffff9c
RBP: 00007f193d8fcd40 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000293 R12: 0000000000004000
R13: 00007ffd96bfb31f R14: 00007f193d8fd300 R15: 0000000000022000
INFO: task syz-executor.0:5391 blocked for more than 144 seconds.
Not tainted 6.4.0-rc3-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:28432 pid:5391 ppid:5234 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5343 [inline]
__schedule+0xc25/0x57f0 kernel/sched/core.c:6669
schedule+0xda/0x1a0 kernel/sched/core.c:6745
schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6804
rwsem_down_write_slowpath+0x3de/0x1210 kernel/locking/rwsem.c:1178
__down_write_common kernel/locking/rwsem.c:1306 [inline]
__down_write kernel/locking/rwsem.c:1315 [inline]
down_write_nested+0x1d2/0x200 kernel/locking/rwsem.c:1690
inode_lock_nested include/linux/fs.h:810 [inline]
fuse_reverse_inval_entry+0x3e/0x4a0 fs/fuse/dir.c:1252
fuse_notify_delete fs/fuse/dev.c:1552 [inline]
fuse_notify fs/fuse/dev.c:1801 [inline]
fuse_dev_do_write+0x1c87/0x2550 fs/fuse/dev.c:1876
fuse_dev_write+0x12f/0x1b0 fs/fuse/dev.c:1960
call_write_iter include/linux/fs.h:1868 [inline]
new_sync_write fs/read_write.c:491 [inline]
vfs_write+0x7c1/0xd10 fs/read_write.c:584
ksys_write+0xee/0x1c0 fs/read_write.c:637
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+0x63/0xcd
RIP: 0033:0x7f193cc8b639
RSP: 002b:00007f193bffe168 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 00007f193cdac050 RCX: 00007f193cc8b639
RDX: 000000000000002c RSI: 00000000200000c0 RDI: 0000000000000003
RBP: 00007f193cce6ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd96bfb31f R14: 00007f193bffe300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/13:
#0: ffffffff8b186cb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by rcu_tasks_trace/14:
#0: ffffffff8b1869b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x31/0xd80 kernel/rcu/tasks.h:518
1 lock held by khungtaskd/27:
#0: ffffffff8b1878c0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x51/0x330 kernel/locking/lockdep.c:6545
2 locks held by getty/4698:
#0: ffff888029b8a098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x1f/0x70 drivers/tty/tty_ldisc.c:243
#1: ffffc900020582f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0xb6f/0x1040 drivers/tty/n_tty.c:2176
1 lock held by syz-executor.0/5234:
#0: ffff888075890150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline]
#0: ffff888075890150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1706 [inline]
#0: ffff888075890150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x296/0x4e0 fs/namei.c:1998
2 locks held by syz-executor.0/5382:
#0: ffff888075890150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline]
#0: ffff888075890150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1706 [inline]
#0: ffff888075890150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x296/0x4e0 fs/namei.c:1998
#1: ffff8880758905b8 (&fi->mutex){+.+.}-{3:3}, at: fuse_lock_inode+0xab/0xe0 fs/fuse/inode.c:475
2 locks held by syz-executor.0/5391:
#0: ffff888078333b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify_delete fs/fuse/dev.c:1551 [inline]
#0: ffff888078333b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_notify fs/fuse/dev.c:1801 [inline]
#0: ffff888078333b38 (&fc->killsb){.+.+}-{3:3}, at: fuse_dev_do_write+0x1c64/0x2550 fs/fuse/dev.c:1876
#1: ffff888075890150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:810 [inline]
#1: ffff888075890150 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: fuse_reverse_inval_entry+0x3e/0x4a0 fs/fuse/dir.c:1252
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 27 Comm: khungtaskd Not tainted 6.4.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x60/0xa0 lib/dump_stack.c:106
nmi_cpu_backtrace+0x171/0x200 lib/nmi_backtrace.c:113
nmi_trigger_cpumask_backtrace+0x1b8/0x200 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:222 [inline]
watchdog+0x9f5/0xcf0 kernel/hung_task.c:379
kthread+0x2e6/0x3c0 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 62 Comm: kworker/u4:4 Not tainted 6.4.0-rc3-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023
Workqueue: phy5 ieee80211_iface_work
RIP: 0010:hlock_class kernel/locking/lockdep.c:228 [inline]
RIP: 0010:check_wait_context kernel/locking/lockdep.c:4771 [inline]
RIP: 0010:__lock_acquire+0x711/0x5df0 kernel/locking/lockdep.c:5024
Code: 20 66 81 e2 ff 1f 0f b7 da be 08 00 00 00 48 89 d8 48 c1 e8 06 48 8d 3c c5 00 eb bc 8f e8 97 d3 5f 00 48 0f a3 1d 6f 29 63 0e <0f> 82 3f ff ff ff 48 c7 c0 00 d2 49 90 48 c1 e8 03 42 0f b6 14 38
RSP: 0018:ffffc9000201f190 EFLAGS: 00000047
RAX: 0000000000000001 RBX: 0000000000000339 RCX: ffffffff8159c189
RDX: fffffbfff1f79d6d RSI: 0000000000000008 RDI: ffffffff8fbceb60
RBP: 0000000000000004 R08: 0000000000000000 R09: ffffffff8fbceb67
R10: fffffbfff1f79d6c R11: 0000000000000000 R12: 0000000000000002
R13: ffff888016773b80 R14: ffff888016774648 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000560412110068 CR3: 000000000af6b000 CR4: 0000000000350ef0
Call Trace:
lock_acquire kernel/locking/lockdep.c:5691 [inline]
lock_acquire+0x1ad/0x520 kernel/locking/lockdep.c:5656
__raw_spin_lock_irqsave include/linux/spinlock_api_smp.h:110 [inline]
_raw_spin_lock_irqsave+0x39/0x50 kernel/locking/spinlock.c:162
debug_object_activate+0x135/0x3f0 lib/debugobjects.c:697
debug_rcu_head_queue kernel/rcu/rcu.h:226 [inline]
kvfree_call_rcu+0x2c/0xad0 kernel/rcu/tree.c:3323
cfg80211_update_known_bss+0x112/0x9f0 net/wireless/scan.c:1685
cfg80211_bss_update+0xd9/0x1fe0 net/wireless/scan.c:1732
cfg80211_inform_single_bss_frame_data+0x604/0xd50 net/wireless/scan.c:2482
cfg80211_inform_bss_frame_data+0xa8/0xbe0 net/wireless/scan.c:2515
ieee80211_bss_info_update+0x265/0x8e0 net/mac80211/scan.c:190
ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline]
ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline]
ieee80211_ibss_rx_queued_mgmt+0x1255/0x2f40 net/mac80211/ibss.c:1638
ieee80211_iface_process_skb net/mac80211/iface.c:1594 [inline]
ieee80211_iface_work+0x6f5/0x9d0 net/mac80211/iface.c:1648
process_one_work+0x86e/0x1410 kernel/workqueue.c:2405
worker_thread+0x5ab/0xef0 kernel/workqueue.c:2552
kthread+0x2e6/0x3c0 kernel/kthread.c:379
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308