INFO: task syz-executor.4:10162 blocked for more than 143 seconds. Not tainted 5.10.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26520 pid:10162 ppid: 8486 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x92c/0xcb0 kernel/sched/core.c:4523 schedule+0x14b/0x200 kernel/sched/core.c:4601 schedule_timeout+0x15c/0x250 kernel/time/timer.c:1876 gfs2_gl_hash_clear+0x128/0x380 fs/gfs2/glock.c:1989 gfs2_fill_super+0x2aa7/0x3db0 fs/gfs2/ops_fstype.c:1233 get_tree_bdev+0x3e9/0x5f0 fs/super.c:1344 gfs2_get_tree+0x4c/0x1f0 fs/gfs2/ops_fstype.c:1256 vfs_get_tree+0x88/0x270 fs/super.c:1549 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x17b4/0x2a20 fs/namespace.c:3205 do_mount fs/namespace.c:3218 [inline] __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3403 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x46090a Code: Unable to access opcode bytes at RIP 0x4608e0. RSP: 002b:00007ff6638a4a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff6638a4b20 RCX: 000000000046090a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ff6638a4ae0 RBP: 00007ff6638a4ae0 R08: 00007ff6638a4b20 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20 Showing all locks held in the system: 3 locks held by kworker/u4:5/311: 1 lock held by khungtaskd/1636: #0: ffffffff8bae6800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by systemd-journal/4883: 1 lock held by in:imklog/8156: #0: ffff8880162e6af0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24b/0x2e0 fs/file.c:932 1 lock held by syz-executor.4/10162: #0: ffff888068eb80e0 (&type->s_umount_key#57/1){+.+.}-{3:3}, at: alloc_super+0x1a7/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1636 Comm: khungtaskd Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x137/0x1be lib/dump_stack.c:118 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:209 [inline] watchdog+0xcb0/0xcf0 kernel/hung_task.c:295 kthread+0x36b/0x390 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 8156 Comm: in:imklog Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0033:0x7faeae2d6e93 Code: 5c 24 40 48 89 44 24 18 bd 10 27 00 00 eb 4e 0f 1f 84 00 00 00 00 00 89 f1 c1 e9 04 8d 44 09 fe 48 98 49 8d 44 c7 68 48 8b 38 <4c> 8d 40 f0 89 c8 ba 01 00 00 00 c1 f8 05 d3 e2 48 98 41 09 94 87 RSP: 002b:00007faeacbcd3a0 EFLAGS: 00000202 RAX: 00007faea8000178 RBX: 00007faea8000078 RCX: 0000000000000010 RDX: 000000000000003e RSI: 0000000000000100 RDI: 00007faea8000168 RBP: 0000000000002710 R08: 00007faeae3aa940 R09: 0000000000000270 R10: 0000000000000001 R11: 0000000000000283 R12: 0000000000000270 R13: 00007faea8000078 R14: 00007faea80022e0 R15: 00007faea8000020 FS: 00007faeacbee700 GS: 0000000000000000