INFO: task syz-executor.5:12624 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.5 state:D stack:26520 pid:12624 ppid: 8457 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:00007f312087ba88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f312087bb20 RCX: 000000000046090a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f312087bae0 RBP: 00007f312087bae0 R08: 00007f312087bb20 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20 Showing all locks held in the system: 1 lock held by khungtaskd/1643: #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/4879: 1 lock held by in:imklog/8147: #0: ffff888017d5f9f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24b/0x2e0 fs/file.c:932 2 locks held by kworker/u4:7/11298: #0: ffff8880b9d34858 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1292 [inline] #0: ffff8880b9d34858 (&rq->lock){-.-.}-{2:2}, at: __schedule+0xdb/0xcb0 kernel/sched/core.c:4441 #1: ffffc90008e6fd80 ((work_completion)(&(&bat_priv->orig_work)->work)){+.+.}-{0:0}, at: process_one_work+0x733/0xfc0 kernel/workqueue.c:2247 1 lock held by syz-executor.5/12624: #0: ffff88802e5e80e0 (&type->s_umount_key#61/1){+.+.}-{3:3}, at: alloc_super+0x1a7/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1643 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: 4879 Comm: systemd-journal Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:orc_find arch/x86/kernel/unwind_orc.c:157 [inline] RIP: 0010:unwind_next_frame+0x1c2/0x1e20 arch/x86/kernel/unwind_orc.c:443 Code: c0 d4 05 19 8e 48 c7 c1 cc 87 3a 8e 48 29 c1 48 8d 41 03 48 85 c9 48 0f 49 c1 40 8a 35 af 36 2a 0a 48 c1 e8 02 ff c8 40 84 f6 ff ff ff ff 0f 45 c8 39 e9 0f 86 5d 16 00 00 89 e8 48 8d 1c 85 RSP: 0018:ffffc9000162f9b0 EFLAGS: 00000202 RAX: 000000000008607d RBX: ffffc9000162fac0 RCX: 00000000002181f8 RDX: dffffc0000000000 RSI: ffffffff81b62301 RDI: ffffffff8132739d RBP: 000000000000b623 R08: 0000000000000002 R09: ffffc9000162fb28 R10: fffff520002c5f5b R11: 0000000000000000 R12: ffffffff81b62304 R13: ffffc9000162fa78 R14: dffffc0000000000 R15: 1ffff920002c5f55 FS: 00007fb277aa98c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb274d75000 CR3: 00000000115e8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0xb2/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0xad/0x150 kernel/stacktrace.c:121 kasan_save_stack mm/kasan/common.c:48 [inline] kasan_set_track mm/kasan/common.c:56 [inline] __kasan_kmalloc+0x111/0x140 mm/kasan/common.c:461 slab_post_alloc_hook+0x3e/0x2b0 mm/slab.h:526 slab_alloc_node mm/slub.c:2891 [inline] slab_alloc mm/slub.c:2899 [inline] kmem_cache_alloc+0x115/0x240 mm/slub.c:2904 prepare_creds+0x3d/0x590 kernel/cred.c:258 access_override_creds fs/open.c:353 [inline] do_faccessat+0x86/0x870 fs/open.c:417 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fb276d659c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffda3ea83a8 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffda3eab2c0 RCX: 00007fb276d659c7 RDX: 00007fb2777d6a00 RSI: 0000000000000000 RDI: 000055eb784a59a3 RBP: 00007ffda3ea83e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffda3eab2c0 R15: 00007ffda3ea88d0