ci2 starts bisection 2023-03-04 20:36:51.164892652 +0000 UTC m=+260826.103581992 bisecting fixing commit since e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 building syzkaller on 96166539c4c242fccd41c7316b7080377dca428b ensuring issue is reproducible on original commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 testing commit e8f60cd7db24f94f2dbed6bec30dd16a68fc0828 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 7e83bc4bdc047a73d8c42f8d624c01501b8c4ede5100553882c557bdd8670e81 all runs: crashed: INFO: task hung in hfs_mdb_commit testing current HEAD 0988a0ea791999ebbf95693f2676381825b05033 testing commit 0988a0ea791999ebbf95693f2676381825b05033 gcc compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 kernel signature: 726a35e7b9a0cb802b617b4df755d79504a2e32e7eaa913729a2ee1a9f23857a all runs: crashed: INFO: task hung in hfs_mdb_commit revisions tested: 2, total time: 51m18.383457897s (build: 36m53.756923592s, test: 11m36.081318548s) the crash still happens on HEAD commit msg: Merge tag 'for-v6.3-part2' of git://git.kernel.org/pub/scm/linux/kernel/git/sre/linux-power-supply crash: INFO: task hung in hfs_mdb_commit INFO: task kworker/1:2:1024 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:kworker/1:2 state:D stack:23072 pid:1024 ppid:2 flags:0x00004000 Workqueue: events_long flush_mdb Call Trace: __schedule+0x177c/0x4930 schedule+0xc3/0x180 io_schedule+0x8c/0x100 bit_wait_io+0x12/0xc0 __wait_on_bit_lock+0xbd/0x1a0 out_of_line_wait_on_bit_lock+0x1d6/0x260 hfs_mdb_commit+0xd5/0xe40 process_one_work+0x80e/0x1050 worker_thread+0x8c9/0xfd0 kthread+0x232/0x2b0 ret_from_fork+0x1f/0x30 INFO: task syz-executor.0:5526 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:21512 pid:5526 ppid:1 flags:0x00004004 Call Trace: __schedule+0x177c/0x4930 schedule+0xc3/0x180 io_schedule+0x8c/0x100 bit_wait_io+0x12/0xc0 __wait_on_bit_lock+0xbd/0x1a0 out_of_line_wait_on_bit_lock+0x1d6/0x260 hfs_mdb_commit+0x9f0/0xe40 hfs_sync_fs+0x9/0x10 sync_filesystem+0xc8/0x190 generic_shutdown_super+0x69/0x2d0 kill_block_super+0x79/0xc0 deactivate_locked_super+0x75/0xd0 cleanup_mnt+0x3af/0x430 task_work_run+0x20a/0x290 exit_to_user_mode_loop+0xd1/0xf0 exit_to_user_mode_prepare+0xb1/0x140 syscall_exit_to_user_mode+0x54/0x2d0 do_syscall_64+0x4d/0xc0 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7fcda468d537 RSP: 002b:00007ffeeaf2cb68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a6 RAX: 0000000000000000 RBX: 0000000000000000 RCX: 00007fcda468d537 RDX: 00007ffeeaf2cc37 RSI: 000000000000000a RDI: 00007ffeeaf2cc30 RBP: 00007ffeeaf2cc30 R08: 00000000ffffffff R09: 00007ffeeaf2ca00 R10: 0000555556524903 R11: 0000000000000246 R12: 00007fcda46e6b24 R13: 00007ffeeaf2dcf0 R14: 0000555556524810 R15: 00007ffeeaf2dd30 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8bf1cc10 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 1 lock held by rcu_tasks_trace/13: #0: ffffffff8bf1d410 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x29/0xd20 1 lock held by khungtaskd/28: #0: ffffffff8bf1ca40 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by kworker/1:2/1024: #0: ffff888011071538 ((wq_completion)events_long){+.+.}-{0:0}, at: process_one_work+0x6f9/0x1050 #1: ffffc90004c17d20 ((work_completion)(&(&sbi->mdb_work)->work)){+.+.}-{0:0}, at: process_one_work+0x740/0x1050 2 locks held by getty/4754: #0: ffff888026fc5098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x20/0x60 #1: ffffc900015802f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x3cf/0x11f0 1 lock held by syz-executor.0/5526: #0: ffff888025f020e0 (&type->s_umount_key#50){+.+.}-{3:3}, at: deactivate_super+0x54/0x80 ============================================= 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 03/02/2023 Call Trace: dump_stack_lvl+0x12e/0x1d0 nmi_cpu_backtrace+0x31c/0x390 nmi_trigger_cpumask_backtrace+0x142/0x330 watchdog+0xb78/0xbc0 kthread+0x232/0x2b0 ret_from_fork+0x1f/0x30 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 skipped: idling at acpi_safe_halt+0x20/0x30