INFO: task syz-executor.2:20185 blocked for more than 143 seconds. Not tainted 5.10.0-rc2-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26728 pid:20185 ppid: 8494 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:1871 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:00007ff7a4ef4a88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ff7a4ef4b20 RCX: 000000000046090a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ff7a4ef4ae0 RBP: 00007ff7a4ef4ae0 R08: 00007ff7a4ef4b20 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/1637: #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/8170: 1 lock held by syz-executor.2/20185: #0: ffff88806affe0e0 (&type->s_umount_key#78/1){+.+.}-{3:3}, at: alloc_super+0x1a7/0x860 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1637 Comm: khungtaskd Not tainted 5.10.0-rc2-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:294 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: 4876 Comm: systemd-journal Not tainted 5.10.0-rc2-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:bytes_is_nonzero mm/kasan/generic.c:91 [inline] RIP: 0010:memory_is_nonzero mm/kasan/generic.c:108 [inline] RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:134 [inline] RIP: 0010:memory_is_poisoned mm/kasan/generic.c:165 [inline] RIP: 0010:check_memory_region_inline mm/kasan/generic.c:183 [inline] RIP: 0010:check_memory_region+0x84/0x2f0 mm/kasan/generic.c:192 Code: df 4d 01 ea 4d 89 d6 4d 29 ce 49 83 fe 10 7f 30 4d 85 f6 0f 84 ae 01 00 00 4c 89 cb 4c 29 d3 0f 1f 80 00 00 00 00 45 0f b6 19 <45> 84 db 0f 85 f3 01 00 00 49 ff c1 48 ff c3 75 eb e9 87 01 00 00 RSP: 0018:ffffc900010ffbb8 EFLAGS: 00000093 RAX: ffffffff8b9c3801 RBX: fffffffffffffffe RCX: ffffffff815dbdc0 RDX: 0000000000000001 RSI: 0000000000000010 RDI: ffffc900010ffce0 RBP: 00000000ffffe008 R08: dffffc0000000000 R09: fffff5200021ff9c R10: fffff5200021ff9e R11: 0000000000000000 R12: 1ffff9200021ff9c R13: dffffc0000000001 R14: 0000000000000002 R15: ffffc900010ffce0 FS: 00007faa0100c8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa9fe595008 CR3: 0000000011ea6000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: memcpy+0x3c/0x60 mm/kasan/common.c:106 desc_read kernel/printk/printk_ringbuffer.c:477 [inline] desc_read_finalized_seq kernel/printk/printk_ringbuffer.c:1756 [inline] prb_read kernel/printk/printk_ringbuffer.c:1804 [inline] _prb_read_valid+0x620/0xf20 kernel/printk/printk_ringbuffer.c:1884 prb_first_valid_seq+0x59/0xb0 kernel/printk/printk_ringbuffer.c:1989 devkmsg_read+0x3c7/0x860 kernel/printk/printk.c:785 vfs_read+0x213/0xa80 fs/read_write.c:494 ksys_read+0x11b/0x220 fs/read_write.c:634 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7faa0059c210 Code: 73 01 c3 48 8b 0d 98 7d 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d b9 c1 20 00 00 75 10 b8 00 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 4e fc ff ff 48 89 04 24 RSP: 002b:00007ffde50dcfd8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000 RAX: ffffffffffffffda RBX: 00007ffde50dfa50 RCX: 00007faa0059c210 RDX: 0000000000002000 RSI: 00007ffde50dd850 RDI: 0000000000000009 RBP: 0000000000000000 R08: 0000000000000008 R09: 0000000000000070 R10: 00007ffde50e1118 R11: 0000000000000246 R12: 00007ffde50dd850 R13: 00007ffde50df9a8 R14: 000055cfe5bc7958 R15: 0005b33830d0d830