INFO: task syz-executor.5:11199 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:11199 ppid: 8522 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: 0033:0x46089a Code: Unable to access opcode bytes at RIP 0x460870. RSP: 002b:00007f90abc2ea88 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007f90abc2eb20 RCX: 000000000046089a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f90abc2eae0 RBP: 00007f90abc2eae0 R08: 00007f90abc2eb20 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/u4:2/77: #0: ffff8880b9e34d18 (&rq->lock){-.-.}-{2:2}, at: newidle_balance+0x789/0xe50 kernel/sched/fair.c:10576 #1: ffffffff8b337060 (rcu_read_lock){....}-{1:2}, at: cpu_of kernel/sched/sched.h:1072 [inline] #1: ffffffff8b337060 (rcu_read_lock){....}-{1:2}, at: __update_idle_core+0x39/0x430 kernel/sched/fair.c:6018 1 lock held by khungtaskd/1610: #0: ffffffff8b337060 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 2 locks held by in:imklog/8186: #0: ffff88801b3659f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:932 #1: ffff8880b9e34d18 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1292 [inline] #1: ffff8880b9e34d18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x21a/0x2130 kernel/sched/core.c:4441 1 lock held by syz-executor.5/11199: #0: ffff8880187e80e0 (&type->s_umount_key#60/1){+.+.}-{3:3}, at: alloc_super+0x1b8/0xa80 fs/super.c:229 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1610 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 243 Comm: kworker/u4:5 Not tainted 5.10.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:memory_is_poisoned_n mm/kasan/generic.c:135 [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+0x55/0x180 mm/kasan/generic.c:192 Code: 86 05 01 00 00 49 83 e9 01 48 89 fd 48 b8 00 00 00 00 00 fc ff df 4d 89 ca 48 c1 ed 03 49 c1 ea 03 48 01 c5 49 01 c2 48 89 e8 <49> 8d 5a 01 48 89 da 48 29 ea 48 83 fa 10 7e 63 41 89 eb 41 83 e3 RSP: 0018:ffffc90001a7fa28 EFLAGS: 00000082 RAX: fffffbfff1d75ee5 RBX: 1ffff9200034ff50 RCX: ffffffff81559707 RDX: 0000000000000000 RSI: 0000000000000008 RDI: ffffffff8ebaf728 RBP: fffffbfff1d75ee5 R08: 0000000000000000 R09: ffffffff8ebaf72f R10: fffffbfff1d75ee5 R11: 0000000000000000 R12: 0000000000000002 R13: 0000000000000660 R14: 0000000000000004 R15: ffffffff888e8ae0 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd0333f8000 CR3: 0000000025446000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: instrument_atomic_read include/linux/instrumented.h:71 [inline] test_bit include/asm-generic/bitops/instrumented-non-atomic.h:134 [inline] hlock_class kernel/locking/lockdep.c:196 [inline] mark_lock+0xf7/0x23a0 kernel/locking/lockdep.c:4388 mark_held_locks+0x9f/0xe0 kernel/locking/lockdep.c:4011 __trace_hardirqs_on_caller kernel/locking/lockdep.c:4029 [inline] lockdep_hardirqs_on_prepare kernel/locking/lockdep.c:4097 [inline] lockdep_hardirqs_on_prepare+0x141/0x410 kernel/locking/lockdep.c:4049 trace_hardirqs_on+0x5b/0x1c0 kernel/trace/trace_preemptirq.c:49 __local_bh_enable_ip+0x9c/0x110 kernel/softirq.c:200 spin_unlock_bh include/linux/spinlock.h:399 [inline] batadv_nc_purge_paths+0x2a5/0x3a0 net/batman-adv/network-coding.c:470 batadv_nc_worker+0x868/0xe50 net/batman-adv/network-coding.c:721 process_one_work+0x933/0x15a0 kernel/workqueue.c:2272 worker_thread+0x64c/0x1120 kernel/workqueue.c:2418 kthread+0x3af/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296