ci starts bisection 2023-04-09 02:05:51.97114464 +0000 UTC m=+90666.449614211
bisecting fixing commit since 9b43a525db125799df81e6fbef712a2ae50bfc5d
building syzkaller on 1dac8c7a01e2bdd35cb04eb4901ddb157291ac2d
ensuring issue is reproducible on original commit 9b43a525db125799df81e6fbef712a2ae50bfc5d
testing commit 9b43a525db125799df81e6fbef712a2ae50bfc5d gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: f5d21c4fb31799d9b7896d817bd451687e60a356fb51a9998c3eeb30d1d2a2d6
all runs: crashed: INFO: task hung in blkdev_put
testing current HEAD 68047c48b2288803c441df9f3e61d0d26bed87df
testing commit 68047c48b2288803c441df9f3e61d0d26bed87df gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 58b9349b3112defb79ceef7282d6306500f2c6293a2bef01dd1a8210e54e18a8
all runs: crashed: INFO: task hung in blkdev_put
revisions tested: 2, total time: 30m24.891938647s (build: 18m4.320335662s, test: 11m41.809605874s)
the crash still happens on HEAD
commit msg: Merge tag 'char-misc-6.3-rc6' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc
crash: INFO: task hung in blkdev_put
INFO: task syz-executor.0:5584 blocked for more than 143 seconds.
Not tainted 6.3.0-rc5-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:26448 pid:5584 ppid:5487 flags:0x00004006
Call Trace:
__schedule+0x1717/0x45f0
schedule+0xc3/0x180
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+0x64/0x280
do_syscall_64+0x4d/0xc0
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f220928c0c9
RSP: 002b:00007f2209f9c168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: 0000000000000000 RBX: 00007f22093abf80 RCX: 00007f220928c0c9
RDX: 0000000000000000 RSI: 000000000000ab03 RDI: 0000000000000003
RBP: 00007f22092e7ae9 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fff68d21bff R14: 00007f2209f9c300 R15: 0000000000022000
Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
#0: ffffffff8bf16f50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20
1 lock held by rcu_tasks_trace/13:
#0: ffffffff8bf17750 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20
1 lock held by khungtaskd/28:
#0: ffffffff8bf16d80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30
2 locks held by getty/4735:
#0: ffff88802acf9098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60
#1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x5ed/0x1880
1 lock held by udevd/5479:
#0: ffff88801ce8c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xd6/0x8b0
1 lock held by syz-executor.0/5584:
#0: ffff88801ce8c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xe8/0x5c0
1 lock held by syz-executor.0/6200:
#0: ffff88801ce8c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xd6/0x8b0
1 lock held by syz-executor.0/6217:
#0: ffff88801ce8c4c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xd6/0x8b0
=============================================
NMI backtrace for cpu 1
CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.3.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Call Trace:
dump_stack_lvl+0x167/0x220
nmi_cpu_backtrace+0x34f/0x380
nmi_trigger_cpumask_backtrace+0x103/0x1f0
watchdog+0xa7c/0xac0
kthread+0x232/0x2b0
ret_from_fork+0x1f/0x30
Sending NMI from CPU 1 to CPUs 0:
NMI backtrace for cpu 0
CPU: 0 PID: 811 Comm: kworker/u4:3 Not tainted 6.3.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: phy9 ieee80211_iface_work
RIP: 0010:validate_chain+0x173/0x58e0
Code: b8 eb 83 b5 80 46 86 c8 61 49 0f af c6 48 c1 e8 2f 48 8d 1c c5 40 11 ee 8e 48 89 d8 48 c1 e8 03 48 89 44 24 58 42 80 3c 20 00 <74> 08 48 89 df e8 b3 31 62 00 48 89 5c 24 20 48 8b 1b 48 85 db 74
RSP: 0018:ffffc90004066de0 EFLAGS: 00000046
RAX: 1ffffffff1df4010 RBX: ffffffff8efa0080 RCX: ffffffff8160a4c9
RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8f021278
RBP: ffffc90004067090 R08: dffffc0000000000 R09: fffffbfff1e04250
R10: 0000000000000000 R11: dffffc0000000001 R12: dffffc0000000000
R13: ffff88801ced8ad0 R14: 6bd50f97703d2ec0 R15: 1ffff110039db15a
FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00005634c440c680 CR3: 000000000bd26000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
__lock_acquire+0x125b/0x1f80
lock_acquire+0x1e1/0x520
_raw_spin_lock_bh+0x35/0x50
cfg80211_bss_update+0x7c/0x1a60
cfg80211_inform_bss_frame_data+0xa4f/0x2020
ieee80211_bss_info_update+0x5f0/0xcc0
ieee80211_ibss_rx_queued_mgmt+0x11ac/0x25d0
ieee80211_iface_work+0x596/0x9c0
process_one_work+0x797/0xe20
worker_thread+0x8c9/0xfd0
kthread+0x232/0x2b0
ret_from_fork+0x1f/0x30