ci2 starts bisection 2023-06-22 07:51:23.314210649 +0000 UTC m=+126467.543168901
bisecting fixing commit since fa74641fb6b93a19ccb50579886ecc98320230f9
building syzkaller on 4bce1a3e705a8b62de8194bdb28f5eef89c8feec
ensuring issue is reproducible on original commit fa74641fb6b93a19ccb50579886ecc98320230f9

testing commit fa74641fb6b93a19ccb50579886ecc98320230f9 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: e677110c0570ca600f28ef51943498e4d2b2279f0d722ad56dc7149bfefb36e3
all runs: crashed: INFO: task hung in blkdev_put
testing current HEAD e84a4e368abe42cf359fe237f0238820859d5044
testing commit e84a4e368abe42cf359fe237f0238820859d5044 gcc
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
kernel signature: a6247dc87de9c9a4d3f1709cac9b9f46cc4e9ad60a28e301270943ee86ae7cba
all runs: crashed: INFO: task hung in blkdev_put
crash still not fixed/happens on the oldest tested release
revisions tested: 2, total time: 1h6m11.828863076s (build: 52m0.335236445s, test: 13m15.060084443s)
crash still not fixed on HEAD or HEAD had kernel test errors
commit msg: Linux 6.1.35
crash: INFO: task hung in blkdev_put
INFO: task syz-executor.0:5186 blocked for more than 143 seconds.
      Not tainted 6.1.35-syzkaller #0
"echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message.
task:syz-executor.0  state:D stack:0     pid:5186  ppid:4576   flags:0x0000000d
Call trace:
 __switch_to+0x280/0x5b4 arch/arm64/kernel/process.c:553
 context_switch kernel/sched/core.c:5241 [inline]
 __schedule+0xec4/0x1c5c kernel/sched/core.c:6554
 schedule+0xc4/0x170 kernel/sched/core.c:6630
 schedule_preempt_disabled+0x18/0x2c kernel/sched/core.c:6689
 __mutex_lock_common+0xbd8/0x21a0 kernel/locking/mutex.c:679
 __mutex_lock kernel/locking/mutex.c:747 [inline]
 mutex_lock_nested+0x38/0x44 kernel/locking/mutex.c:799
 blkdev_put+0xd0/0x5b4 block/bdev.c:911
 blkdev_close+0x54/0x90 block/fops.c:514
 __fput+0x278/0x658 fs/file_table.c:320
 ____fput+0x10/0x1c fs/file_table.c:348
 task_work_run+0x20c/0x294 kernel/task_work.c:179
 get_signal+0xe60/0x1024 kernel/signal.c:2635
 do_signal arch/arm64/kernel/signal.c:1076 [inline]
 do_notify_resume+0x2c8/0x26cc arch/arm64/kernel/signal.c:1129
 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline]
 exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline]
 el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638
 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655
 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581

Showing all locks held in the system:
1 lock held by rcu_tasks_kthre/12:
 #0: ffff80001441c4f0 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510
1 lock held by rcu_tasks_trace/13:
 #0: ffff80001441ccf0 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x44/0xcf4 kernel/rcu/tasks.h:510
1 lock held by khungtaskd/28:
 #0: ffff80001441c320 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0xc/0x44 include/linux/rcupdate.h:305
2 locks held by getty/3985:
 #0: ffff0000d61ad098 (&tty->ldisc_sem){++++}-{0:0}, at: ldsem_down_read+0x38/0x48 drivers/tty/tty_ldsem.c:340
 #1: ffff80001bffe2f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x30c/0xe68 drivers/tty/n_tty.c:2177
1 lock held by udevd/4570:
 #0: ffff0000ce6d64c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xbc/0x794 block/bdev.c:813
1 lock held by syz-executor.0/5186:
 #0: ffff0000ce6d64c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xd0/0x5b4 block/bdev.c:911
1 lock held by syz-executor.0/5201:
 #0: ffff0000ce6d64c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xbc/0x794 block/bdev.c:813
1 lock held by syz-executor.0/5223:
 #0: ffff0000ce6d64c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xbc/0x794 block/bdev.c:813

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