ci starts bisection 2023-02-20 09:41:42.278517415 +0000 UTC m=+145738.651572047
bisecting fixing commit since ff83fec8179e392be2f472f0a9ec3da8f6d529c6
building syzkaller on 559a440a347ffd1bf9dc09d734381d7937cd287c
ensuring issue is reproducible on original commit ff83fec8179e392be2f472f0a9ec3da8f6d529c6
testing commit ff83fec8179e392be2f472f0a9ec3da8f6d529c6 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: b37a5d8d747d619b7a88e2cdae50a3210fe6ddb0f36e94006c9f830105dc0f9d
all runs: crashed: INFO: task hung in blkdev_put
testing current HEAD c9c3395d5e3dcc6daee66c6908354d47bf98cb0c
testing commit c9c3395d5e3dcc6daee66c6908354d47bf98cb0c gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 19bfa4bba8f13af0526cc10e4290703c4d9379e34ada154642a2d93b8fa3d019
all runs: crashed: INFO: task hung in blkdev_put
revisions tested: 2, total time: 1h0m56.307037256s (build: 48m17.221239453s, test: 11m45.618439609s)
the crash still happens on HEAD
commit msg: Linux 6.2
crash: INFO: task hung in blkdev_put
INFO: task syz-executor.0:5740 blocked for more than 143 seconds.
Not tainted 6.2.0-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:27112 pid:5740 ppid:5524 flags:0x00004006
Call Trace:
__schedule+0x13e2/0x43b0
schedule+0xc3/0x190
schedule_preempt_disabled+0x13/0x20
__mutex_lock_common+0xe33/0x2530
mutex_lock_nested+0x1b/0x20
blkdev_put+0xe8/0x5c0
blkdev_close+0x55/0x80
__fput+0x33f/0x720
task_work_run+0x20a/0x290
get_signal+0x1144/0x12e0
arch_do_signal_or_restart+0x91/0x670
exit_to_user_mode_loop+0x6a/0x100
exit_to_user_mode_prepare+0xb1/0x140
syscall_exit_to_user_mode+0x64/0x2e0
do_syscall_64+0x4d/0xc0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f55b148c0c9
RSP: 002b:00007f55b21b3168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f55b15abf80 RCX: 00007f55b148c0c9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f55b14e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff22a0c2ff R14: 00007f55b21b3300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf17bb0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf183b0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x26/0xce0
1 lock held by khungtaskd/28:
#0: ffffffff8bf179e0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4734:
#0: ffff8880266f4098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60
#1: ffffc900015902f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ed/0x1880
1 lock held by udevd/5523:
#0: ffff8881469544c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xd6/0x8b0
1 lock held by syz-executor.0/5740:
#0: ffff8881469544c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xe8/0x5c0
1 lock held by syz-executor.0/6207:
#0: ffff8881469544c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xd6/0x8b0
1 lock held by syz-executor.0/6225:
#0: ffff8881469544c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xd6/0x8b0
=============================================
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 6.2.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Call Trace:
dump_stack_lvl+0x167/0x220
nmi_cpu_backtrace+0x381/0x3f0
nmi_trigger_cpumask_backtrace+0x138/0x310
watchdog+0xb32/0xb70
kthread+0x232/0x2b0
ret_from_fork+0x1f/0x30
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 929 Comm: kworker/u4:3 Not tainted 6.2.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/21/2023
Workqueue: phy7 ieee80211_iface_work
RIP: 0010:rcu_lockdep_current_cpu_online+0xbf/0x120
Code: 18 48 89 d8 48 c1 e8 03 42 80 3c 30 00 74 08 48 89 df e8 b4 b5 5a 00 48 8b 1b 48 83 c3 70 48 89 d8 48 c1 e8 03 42 80 3c 30 00 <74> 08 48 89 df e8 97 b5 5a 00 4c 23 3b 75 1a 48 c7 c7 40 d1 f1 8b
RSP: 0018:ffffc90004486ca0 EFLAGS: 00000046
RAX: 1ffffffff17e3916 RBX: ffffffff8bf1c8b0 RCX: 0000000080000203
RDX: 0000000000000000 RSI: ffffffff8a381520 RDI: ffff8880b9d3c020
RBP: ffffc90004486d50 R08: dffffc0000000000 R09: fffffbfff1a785c6
R10: 0000000000000000 R11: dffffc0000000001 R12: 1ffff92000890db4
R13: dffffc0000000000 R14: dffffc0000000000 R15: 0000000000000002
FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a54a55c680 CR3: 000000000bc8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
rcu_read_lock_sched_held+0x78/0x130
lock_acquire+0x12a/0x630
_raw_spin_lock_irqsave+0xd5/0x120
__debug_object_init+0xdd/0x1880
debug_object_activate+0x17b/0x6d0
kvfree_call_rcu+0xb8/0x8d0
cfg80211_update_known_bss+0x133/0x910
cfg80211_bss_update+0x13c/0x1a50
cfg80211_inform_bss_frame_data+0xae6/0x20f0
ieee80211_bss_info_update+0x5ff/0xd40
ieee80211_ibss_rx_queued_mgmt+0x1250/0x2700
ieee80211_iface_work+0x596/0x9c0
process_one_work+0x7e5/0x1000
worker_thread+0x8c9/0xfd0
kthread+0x232/0x2b0
ret_from_fork+0x1f/0x30