INFO: task syz-executor.0:10846 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.0 state:D stack:27384 pid:10846 ppid: 8460 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] vfs_setxattr+0x148/0x310 fs/xattr.c:290 setxattr+0x125/0x240 fs/xattr.c:553 path_setxattr+0x109/0x1c0 fs/xattr.c:572 __do_sys_lsetxattr fs/xattr.c:594 [inline] __se_sys_lsetxattr fs/xattr.c:590 [inline] __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:590 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f0400207c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 00000000200021c0 RDI: 0000000020002180 RBP: 000000000119bfd0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffced3d3b1f R14: 00007f04002089c0 R15: 000000000119bf8c INFO: task syz-executor.0:10886 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.0 state:D stack:28160 pid:10886 ppid: 8460 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] lock_mount+0x6a/0x2f0 fs/namespace.c:2198 do_new_mount_fc fs/namespace.c:2824 [inline] do_new_mount fs/namespace.c:2883 [inline] path_mount+0x20d1/0x2a00 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount+0x28c/0x320 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:00007f04001a4c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000020002000 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 000000000119c1c8 R08: 0000000020002640 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c184 R13: 00007ffced3d3b1f R14: 00007f04001a59c0 R15: 000000000119c184 Showing all locks held in the system: 1 lock held by khungtaskd/1648: #0: ffffffff8bd11700 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by systemd-journal/4870: 1 lock held by in:imklog/8146: #0: ffff8880164f2ff0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 2 locks held by syz-executor.0/10846: #0: ffff8880297ca460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:354 #1: ffff88807b430150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff88807b430150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x148/0x310 fs/xattr.c:290 2 locks held by syz-executor.0/10860: 1 lock held by syz-executor.0/10886: #0: ffff88807b430150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88807b430150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2198 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1648 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+0x137/0x1be lib/dump_stack.c:120 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+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 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: 10860 Comm: syz-executor.0 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+0xdcf/0x5e90 kernel/locking/lockdep.c:4815 Code: 92 18 00 00 89 44 24 74 4c 89 f0 48 c1 e8 03 80 3c 38 00 74 12 4c 89 f7 e8 3e a2 5f 00 48 bf 00 00 00 00 00 fc ff df 4d 89 3e <48> 8b 44 24 48 8a 04 38 84 c0 0f 85 06 1f 00 00 48 8b 44 24 20 8b RSP: 0018:ffffc90016bd75d0 EFLAGS: 00000046 RAX: 1ffff110041e5830 RBX: ffff888020f2c0f8 RCX: ffffffff815b7ee9 RDX: 0000000000000000 RSI: 0000000000000008 RDI: dffffc0000000000 RBP: ffffc90016bd7778 R08: dffffc0000000000 R09: fffffbfff1de14b2 R10: fffffbfff1de14b2 R11: 0000000000000000 R12: ffff888020f2b780 R13: ffff888020f2c1a0 R14: ffff888020f2c180 R15: daedc5802f17be28 FS: 00007f04001e7700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c01f5b5000 CR3: 000000002d703000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire+0x114/0x5e0 kernel/locking/lockdep.c:5442 __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] find_inode+0x12e/0x3e0 fs/inode.c:826 ilookup5_nowait fs/inode.c:1334 [inline] ilookup5+0x9d/0x1e0 fs/inode.c:1363 iget5_locked+0x30/0x3d0 fs/inode.c:1144 fuse_iget+0x343/0x6d0 fs/fuse/inode.c:342 fuse_lookup_name+0x5c3/0x750 fs/fuse/dir.c:439 fuse_lookup+0xe5/0x470 fs/fuse/dir.c:469 __lookup_slow+0x240/0x370 fs/namei.c:1544 lookup_slow fs/namei.c:1561 [inline] walk_component+0x455/0x6b0 fs/namei.c:1861 lookup_last fs/namei.c:2312 [inline] path_lookupat+0x19d/0x970 fs/namei.c:2336 filename_lookup+0x1b0/0x5e0 fs/namei.c:2369 user_path_at include/linux/namei.h:59 [inline] path_setxattr+0x51/0x1c0 fs/xattr.c:567 __do_sys_lsetxattr fs/xattr.c:594 [inline] __se_sys_lsetxattr fs/xattr.c:590 [inline] __x64_sys_lsetxattr+0xb4/0xd0 fs/xattr.c:590 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:00007f04001e6c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000bd RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200020c0 RBP: 000000000119c078 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000000b R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffced3d3b1f R14: 00007f04001e79c0 R15: 000000000119c034