INFO: task syz-executor.1:11819 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.1 state:D stack:26864 pid:11819 ppid: 8478 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:00007f1fde451a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f1fde451b20 RCX: 000000000046090a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f1fde451ae0 RBP: 00007f1fde451ae0 R08: 00007f1fde451b20 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/1645: #0: ffffffff8bae6800 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8155: #0: ffff88801f7cc870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24b/0x2e0 fs/file.c:932 1 lock held by syz-executor.1/11819: #0: ffff888017d1c0e0 (&type->s_umount_key#53/1){+.+.}-{3:3}, at: alloc_super+0x1a7/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1645 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4881 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:unwind_next_frame+0x129/0x1e20 arch/x86/kernel/unwind_orc.c:443 Code: 8d 80 84 00 f6 03 03 0f 85 cf 16 00 00 4c 8b 2c 24 49 8d 6d 35 49 89 ef 49 c1 ef 03 49 be 00 00 00 00 00 fc ff df 43 8a 04 37 <84> c0 0f 85 05 18 00 00 4c 0f be 65 00 48 8b 44 24 30 42 80 3c 30 RSP: 0018:ffffc9000161f8b0 EFLAGS: 00000a07 RAX: 1ffff920002c3f00 RBX: 0000000000000000 RCX: ffffffff893f4600 RDX: dffffc0000000000 RSI: ffffffff81b630e5 RDI: ffffffff8132739d RBP: ffffc9000161f9ad R08: 0000000000000004 R09: ffffc9000161fa28 R10: fffff520002c3f3b R11: 0000000000000000 R12: ffffc9000161f9b0 R13: ffffc9000161f978 R14: dffffc0000000000 R15: 1ffff920002c3f35 FS: 00007f7f5683f8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f53c65000 CR3: 0000000011dea000 CR4: 00000000001526f0 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+0x3d/0x70 mm/kasan/common.c:56 kasan_set_free_info+0x17/0x30 mm/kasan/generic.c:355 __kasan_slab_free+0x108/0x140 mm/kasan/common.c:422 slab_free_hook mm/slub.c:1544 [inline] slab_free_freelist_hook+0xd6/0x1a0 mm/slub.c:1577 slab_free mm/slub.c:3142 [inline] kmem_cache_free+0x85/0x160 mm/slub.c:3158 putname fs/namei.c:259 [inline] filename_lookup+0x42f/0x5e0 fs/namei.c:2377 user_path_at include/linux/namei.h:59 [inline] do_faccessat+0x3a0/0x870 fs/open.c:423 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7f7f55afb9c7 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:00007fff7a209978 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007fff7a20c9a0 RCX: 00007f7f55afb9c7 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 000055e00e1689a3 RBP: 00007fff7a209ac0 R08: 000055e00e15e3e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 000055e00faec8a0 R15: 00007fff7a209fb0