INFO: task syz-executor.5:11098 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29624 pid:11098 ppid: 8684 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write_nested+0x136/0x150 kernel/locking/rwsem.c:1517 inode_lock_nested include/linux/fs.h:808 [inline] do_rmdir+0x233/0x440 fs/namei.c:3764 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f761f49ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000054 RAX: ffffffffffffffda RBX: 0000000000000001 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 000000000119c058 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007fff59fd773f R14: 00007f761f49b9c0 R15: 000000000119c034 INFO: task syz-executor.5:11136 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27776 pid:11136 ppid: 8684 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5078 schedule+0xcf/0x270 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0x7e5/0x1200 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write_common kernel/locking/rwsem.c:1258 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x132/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] lock_mount+0x8a/0x2e0 fs/namespace.c:2198 do_new_mount_fc fs/namespace.c:2824 [inline] do_new_mount fs/namespace.c:2883 [inline] path_mount+0x1787/0x20c0 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount fs/namespace.c:3409 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f761f458c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000020002100 RSI: 00000000200020c0 RDI: 0000000000000000 RBP: 000000000119c1c8 R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c184 R13: 00007fff59fd773f R14: 00007f761f4599c0 R15: 000000000119c184 Showing all locks held in the system: 2 locks held by kworker/u4:3/97: #0: ffff8880b9f34d18 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline] #0: ffff8880b9f34d18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4995 #1: ffff8880b9f20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 1 lock held by khungtaskd/1638: #0: ffffffff8b373da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 1 lock held by in:imklog/8362: #0: ffff888013ad3df0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 2 locks held by syz-executor.5/11090: 2 locks held by syz-executor.5/11098: #0: ffff88801710a460 (sb_writers#19){.+.+}-{0:0}, at: do_rmdir+0x1e2/0x440 fs/namei.c:3760 #1: ffff88806d035950 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:808 [inline] #1: ffff88806d035950 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: do_rmdir+0x233/0x440 fs/namei.c:3764 1 lock held by syz-executor.5/11136: #0: ffff88806d035950 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88806d035950 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1638 Comm: khungtaskd Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:79 [inline] dump_stack+0x107/0x163 lib/dump_stack.c:120 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:294 kthread+0x3b1/0x4a0 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: 11090 Comm: syz-executor.5 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:lock_acquire+0xc/0x720 kernel/locking/lockdep.c:5410 Code: ff 48 c7 c7 18 df 03 8d e8 e1 7e 5c 00 e9 fb fe ff ff 66 90 66 2e 0f 1f 84 00 00 00 00 00 48 b8 00 00 00 00 00 fc ff df 41 57 <41> 89 d7 41 56 41 89 f6 41 55 49 89 fd 41 54 41 89 cc 55 44 89 c5 RSP: 0018:ffffc90001ca7638 EFLAGS: 00000246 RAX: dffffc0000000000 RBX: ffffc90001ca7718 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff8b0146d8 RBP: ffffffff8b0146c0 R08: 0000000000000001 R09: 0000000000000000 R10: ffffffff81c77908 R11: 0000000000000000 R12: ffffc900008f1dd8 R13: ffffffff82a1a1a0 R14: 0000000000000013 R15: dffffc0000000000 FS: 00007f761f4bc700(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0ddce06000 CR3: 0000000023339000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: __raw_spin_lock include/linux/spinlock_api_smp.h:142 [inline] _raw_spin_lock+0x2a/0x40 kernel/locking/spinlock.c:151 spin_lock include/linux/spinlock.h:354 [inline] ilookup5_nowait fs/inode.c:1333 [inline] ilookup5 fs/inode.c:1363 [inline] iget5_locked+0xac/0x2d0 fs/inode.c:1144 fuse_iget+0x271/0x610 fs/fuse/inode.c:342 fuse_lookup_name+0x447/0x630 fs/fuse/dir.c:439 fuse_lookup.part.0+0xdf/0x390 fs/fuse/dir.c:469 fuse_lookup+0x70/0x90 fs/fuse/dir.c:465 __lookup_slow+0x24c/0x480 fs/namei.c:1544 lookup_slow fs/namei.c:1561 [inline] walk_component+0x418/0x6a0 fs/namei.c:1861 lookup_last fs/namei.c:2312 [inline] path_lookupat+0x1ba/0x830 fs/namei.c:2336 filename_lookup+0x19f/0x560 fs/namei.c:2369 user_path_at include/linux/namei.h:59 [inline] do_mount fs/namespace.c:3221 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount fs/namespace.c:3409 [inline] __x64_sys_mount+0x1ea/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 Code: 0d b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 0f 83 db b3 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f761f4bbc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000020000080 RDI: 0000000000000000 RBP: 000000000119bfd0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007fff59fd773f R14: 00007f761f4bc9c0 R15: 000000000119bf8c