INFO: task syz-executor.5:11258 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:26128 pid:11258 ppid: 8529 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:3774 [inline] __schedule+0x893/0x2130 kernel/sched/core.c:4523 schedule+0xcf/0x270 kernel/sched/core.c:4601 schedule_timeout+0x148/0x250 kernel/time/timer.c:1876 gfs2_gl_hash_clear+0x240/0x270 fs/gfs2/glock.c:1989 gfs2_fill_super+0x1e81/0x23f0 fs/gfs2/ops_fstype.c:1233 get_tree_bdev+0x421/0x740 fs/super.c:1344 gfs2_get_tree+0x4a/0x270 fs/gfs2/ops_fstype.c:1256 vfs_get_tree+0x89/0x2f0 fs/super.c:1549 do_new_mount fs/namespace.c:2875 [inline] path_mount+0x13ad/0x20c0 fs/namespace.c:3205 do_mount fs/namespace.c:3218 [inline] __do_sys_mount fs/namespace.c:3426 [inline] __se_sys_mount fs/namespace.c:3403 [inline] __x64_sys_mount+0x27f/0x300 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:00007effd3d07a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007effd3d07b20 RCX: 000000000046090a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007effd3d07ae0 RBP: 00007effd3d07ae0 R08: 00007effd3d07b20 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000202 R12: 0000000020000000 R13: 0000000020000100 R14: 0000000020000200 R15: 0000000020047a20 Showing all locks held in the system: 2 locks held by kworker/u4:4/174: 1 lock held by khungtaskd/1648: #0: ffffffff8b337060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 1 lock held by in:imklog/8166: #0: ffff888022e52170 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 2 locks held by rs:main Q:Reg/8167: 1 lock held by syz-executor.5/11258: #0: ffff88806abe80e0 (&type->s_umount_key#65/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0xa80 fs/super.c:229 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1648 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+0x107/0x163 lib/dump_stack.c:118 nmi_cpu_backtrace.cold+0x44/0xd7 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1b3/0x230 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+0xd43/0xfa0 kernel/hung_task.c:295 kthread+0x3af/0x4a0 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: 4878 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:arch_irqs_disabled_flags arch/x86/include/asm/irqflags.h:164 [inline] RIP: 0010:check_preemption_disabled+0x4d/0x130 lib/smp_processor_id.c:19 Code: e3 ff ff ff 7f 31 ff 89 de 0f 1f 44 00 00 85 db 74 11 0f 1f 44 00 00 44 89 e0 5b 5d 41 5c 41 5d 41 5e c3 0f 1f 44 00 00 9c 5b <81> e3 00 02 00 00 31 ff 48 89 de 0f 1f 44 00 00 48 85 db 74 d3 0f RSP: 0018:ffffc900014577f0 EFLAGS: 00000046 RAX: 0000000000000001 RBX: 0000000000000046 RCX: ffffc90001457870 RDX: 1ffff110027a25b0 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffffff899d10c0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000001 R13: ffffffff894b5e40 R14: ffff888013d12d88 R15: ffff888013d12480 FS: 00007fa1d69798c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa1d3db2250 CR3: 0000000014054000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:435 [inline] lock_release+0x3bb/0x710 kernel/locking/lockdep.c:5464 rcu_lock_release include/linux/rcupdate.h:253 [inline] rcu_read_unlock include/linux/rcupdate.h:695 [inline] avc_has_perm_noaudit+0x1e9/0x390 security/selinux/avc.c:1163 selinux_inode_permission+0x3ff/0x670 security/selinux/hooks.c:3050 security_inode_permission+0x92/0xf0 security/security.c:1259 inode_permission.part.0+0x113/0x410 fs/namei.c:471 inode_permission fs/namei.c:444 [inline] may_lookup fs/namei.c:1569 [inline] link_path_walk.part.0+0x1f2/0xc20 fs/namei.c:2126 link_path_walk fs/namei.c:2113 [inline] path_parentat+0xa8/0x1b0 fs/namei.c:2386 filename_parentat+0x188/0x560 fs/namei.c:2408 filename_create+0x9e/0x490 fs/namei.c:3450 user_path_create fs/namei.c:3525 [inline] do_mkdirat+0xa0/0x2d0 fs/namei.c:3665 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fa1d5c35687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffe459521f8 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffe45955260 RCX: 00007fa1d5c35687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 000055d5340dd8c0 RBP: 00007ffe45952230 R08: 000055d532b073e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 000055d5340dd8c0 R15: 00007ffe45952870