bisecting fixing commit since 3e732ebf7316ac83e8562db7e64cc68aec390a18
building syzkaller on 975824663d2c65cf7a4d7829fa95f118b675c3be
testing commit 3e732ebf7316ac83e8562db7e64cc68aec390a18
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 5dda09ecf5c6eb9ca426c2e81c01ccc2543c938513f7ed971ff5933e27bb8362
run #0: basic kernel testing failed: BUG: program execution failed: executor NUM: exit status NUM
run #1: crashed: INFO: task hung in nbd_add_socket
run #2: crashed: INFO: task hung in nbd_add_socket
run #3: crashed: INFO: task hung in nbd_add_socket
run #4: crashed: INFO: task hung in nbd_add_socket
run #5: crashed: INFO: task hung in nbd_add_socket
run #6: crashed: INFO: task hung in nbd_add_socket
run #7: crashed: INFO: task hung in nbd_add_socket
run #8: crashed: INFO: task hung in nbd_add_socket
run #9: crashed: INFO: task hung in nbd_add_socket
run #10: crashed: INFO: task hung in nbd_add_socket
run #11: crashed: INFO: task hung in nbd_add_socket
run #12: crashed: INFO: task hung in nbd_add_socket
run #13: crashed: INFO: task hung in nbd_add_socket
run #14: crashed: INFO: task hung in nbd_add_socket
run #15: crashed: INFO: task hung in nbd_add_socket
run #16: crashed: INFO: task hung in nbd_add_socket
run #17: crashed: INFO: task hung in nbd_add_socket
run #18: crashed: INFO: task hung in nbd_add_socket
run #19: crashed: INFO: task hung in nbd_add_socket
testing current HEAD 9b59ec8d50a1f28747ceff9a4f39af5deba9540e
testing commit 9b59ec8d50a1f28747ceff9a4f39af5deba9540e
compiler: gcc (GCC) 10.2.1 20210217, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: 9bbe1d98b5c644cb164ff399a9de15d87dfd0ff3ffdb3be6d57897769faf55df
all runs: crashed: INFO: task hung in nbd_add_socket
revisions tested: 2, total time: 24m44.066409623s (build: 12m36.224377802s, test: 11m32.912844386s)
the crash still happens on HEAD
commit msg: Merge tag 'riscv-for-linus-5.19-rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/riscv/linux
crash: INFO: task hung in nbd_add_socket
INFO: task syz-executor.0:4103 blocked for more than 143 seconds.
Not tainted 5.19.0-rc6-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0 state:D stack:29168 pid: 4103 ppid: 4082 flags:0x00000004
Call Trace:
context_switch kernel/sched/core.c:5146 [inline]
__schedule+0x9cd/0x4b20 kernel/sched/core.c:6458
schedule+0xd2/0x1f0 kernel/sched/core.c:6530
blk_mq_freeze_queue_wait+0xec/0x120 block/blk-mq.c:180
nbd_add_socket+0x152/0x7e0 drivers/block/nbd.c:1122
__nbd_ioctl drivers/block/nbd.c:1463 [inline]
nbd_ioctl+0x3a2/0x9c0 drivers/block/nbd.c:1520
blkdev_ioctl+0x2ff/0x660 block/ioctl.c:614
vfs_ioctl fs/ioctl.c:51 [inline]
__do_sys_ioctl fs/ioctl.c:870 [inline]
__se_sys_ioctl fs/ioctl.c:856 [inline]
__x64_sys_ioctl+0x11f/0x190 fs/ioctl.c:856
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0x80 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f0114689049
RSP: 002b:00007f01157e4168 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007f011479bf60 RCX: 00007f0114689049
RDX: 0000000000000005 RSI: 000000000000ab00 RDI: 0000000000000004
RBP: 00007f01146e308d R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007ffd386ccf3f R14: 00007f01157e4300 R15: 0000000000022000
INFO: lockdep is turned off.
NMI backtrace for cpu 0
CPU: 0 PID: 28 Comm: khungtaskd Not tainted 5.19.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Call Trace:
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0x57/0x7d lib/dump_stack.c:106
nmi_cpu_backtrace.cold+0x30/0xc0 lib/nmi_backtrace.c:111
nmi_trigger_cpumask_backtrace+0x18f/0x1d0 lib/nmi_backtrace.c:62
trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline]
check_hung_uninterruptible_tasks kernel/hung_task.c:212 [inline]
watchdog+0x88c/0xbf0 kernel/hung_task.c:369
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306
Sending NMI from CPU 0 to CPUs 1:
NMI backtrace for cpu 1
CPU: 1 PID: 26 Comm: kworker/1:1 Not tainted 5.19.0-rc6-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022
Workqueue: events_power_efficient wg_ratelimiter_gc_entries
RIP: 0010:ktime_get_coarse_with_offset+0x48/0x1a0 kernel/time/timekeeping.c:906
Code: 88 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 40 01 00 00 8b 0d 4c 49 44 0b 4c 8b 2c dd 20 07 ee 88 <85> c9 0f 85 16 01 00 00 48 b8 00 00 00 00 00 fc ff df 4d 89 ec 49
RSP: 0018:ffffc90000a1fca0 EFLAGS: 00000246
RAX: dffffc0000000000 RBX: 0000000000000001 RCX: 0000000000000000
RDX: 1ffffffff11dc0e5 RSI: 0000000000000008 RDI: ffffffff88ee0728
RBP: ffffffff8b9fad60 R08: 0000000000000000 R09: ffffffff8ca52257
R10: fffffbfff194a44a R11: ffff8880b9f28148 R12: ffffc90000a1fdb8
R13: ffffffff8ada2a10 R14: ffffffff8b9fad60 R15: 0000000000000001
FS: 0000000000000000(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055a69ad95600 CR3: 000000000aa8e000 CR4: 00000000003506e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
ktime_get_coarse_boottime include/linux/timekeeping.h:100 [inline]
ktime_get_coarse_boottime_ns include/linux/timekeeping.h:136 [inline]
wg_ratelimiter_gc_entries+0x1b/0x370 drivers/net/wireguard/ratelimiter.c:57
process_one_work+0x841/0x13a0 kernel/workqueue.c:2289
worker_thread+0x598/0xec0 kernel/workqueue.c:2436
kthread+0x299/0x340 kernel/kthread.c:376
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:306