INFO: task syz-executor.3:15511 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28384 pid:15511 ppid: 8363 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 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+0x117/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] vfs_setxattr+0x148/0x320 fs/xattr.c:299 setxattr+0x131/0x270 fs/xattr.c:573 path_setxattr+0x141/0x200 fs/xattr.c:593 __do_sys_setxattr fs/xattr.c:609 [inline] __se_sys_setxattr fs/xattr.c:605 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:605 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f011541b188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465ef9 RDX: 0000000020000740 RSI: 00000000200001c0 RDI: 0000000020000180 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005c R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fff1e67ab9f R14: 00007f011541b300 R15: 0000000000022000 INFO: task syz-executor.3:15560 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28128 pid:15560 ppid: 8363 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 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+0x117/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] lock_mount+0x6a/0x2f0 fs/namespace.c:2229 do_new_mount_fc fs/namespace.c:2859 [inline] do_new_mount fs/namespace.c:2918 [inline] path_mount+0x20b2/0x29a0 fs/namespace.c:3246 do_mount fs/namespace.c:3259 [inline] __do_sys_mount fs/namespace.c:3467 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3444 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f01153b8188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c158 RCX: 0000000000465ef9 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004bcd1c R08: 0000000020000300 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c158 R13: 00007fff1e67ab9f R14: 00007f01153b8300 R15: 0000000000022000 INFO: task syz-executor.3:15564 blocked for more than 143 seconds. Not tainted 5.11.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29728 pid:15564 ppid: 8363 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4324 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5075 schedule+0x14b/0x200 kernel/sched/core.c:5154 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+0x117/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:775 [inline] vfs_setxattr+0x148/0x320 fs/xattr.c:299 setxattr+0x131/0x270 fs/xattr.c:573 path_setxattr+0x141/0x200 fs/xattr.c:593 __do_sys_setxattr fs/xattr.c:609 [inline] __se_sys_setxattr fs/xattr.c:605 [inline] __x64_sys_setxattr+0xb7/0xd0 fs/xattr.c:605 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007f0115376188 EFLAGS: 00000246 ORIG_RAX: 00000000000000bc RAX: ffffffffffffffda RBX: 000000000056c2a8 RCX: 0000000000465ef9 RDX: 0000000020000740 RSI: 00000000200001c0 RDI: 0000000020000180 RBP: 00000000004bcd1c R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000005c R11: 0000000000000246 R12: 000000000056c2a8 R13: 00007fff1e67ab9f R14: 00007f0115376300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:0/8: 1 lock held by khungtaskd/1638: #0: ffffffff8c710000 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8060: #0: ffff8880132bd270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 2 locks held by syz-executor.3/15511: #0: ffff88801ddca460 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:375 #1: ffff888072fc29d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff888072fc29d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x148/0x320 fs/xattr.c:299 4 locks held by syz-executor.3/15518: 1 lock held by syz-executor.3/15560: #0: ffff888072fc29d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff888072fc29d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2229 2 locks held by syz-executor.3/15564: #0: ffff88801ddca460 (sb_writers#18){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:375 #1: ffff888072fc29d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff888072fc29d0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x148/0x320 fs/xattr.c:299 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1638 Comm: khungtaskd Not tainted 5.11.0-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+0x125/0x19e 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:294 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4800 Comm: systemd-journal Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x7e/0x5e60 kernel/locking/lockdep.c:4770 Code: 00 00 00 fc ff df 8a 04 30 84 c0 48 89 7c 24 78 0f 85 10 26 00 00 83 3d e3 73 59 0c 00 0f 84 84 41 00 00 83 3d 82 fd 01 0b 00 <74> 32 48 89 f8 48 c1 e8 03 80 3c 30 00 74 19 48 8b 7c 24 78 e8 99 RSP: 0018:ffffc90000f8f890 EFLAGS: 00000002 RAX: 1ffffffff1b6ab00 RBX: ffff888012fc5340 RCX: 0000000000000002 RDX: 0000000000000000 RSI: dffffc0000000000 RDI: ffffffff8c710000 RBP: ffffc90000f8fa38 R08: 0000000000000000 R09: 0000000000000000 R10: fffffbfff1b6a5ce R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000002 R15: 0000000000000000 FS: 00007f6f526df8c0(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6f4f520000 CR3: 000000001298d000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x114/0x5f0 kernel/locking/lockdep.c:5510 rcu_lock_acquire+0x2a/0x30 include/linux/rcupdate.h:267 rcu_read_lock include/linux/rcupdate.h:656 [inline] __d_lookup+0x89/0x750 fs/dcache.c:2419 lookup_fast+0x8f/0x6c0 fs/namei.c:1584 walk_component+0x72/0x6b0 fs/namei.c:1935 link_path_walk+0x62f/0xcb0 fs/namei.c:2262 path_lookupat+0xab/0x9b0 fs/namei.c:2419 filename_lookup+0x1b0/0x5e0 fs/namei.c:2453 user_path_at include/linux/namei.h:60 [inline] do_faccessat+0x39d/0x890 fs/open.c:425 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6f5199a9c7 Code: 83 c4 08 48 3d 01 f0 ff ff 73 01 c3 48 8b 0d c8 d4 2b 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 b8 15 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d a1 d4 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffeaf5db108 EFLAGS: 00000246 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 00007ffeaf5de020 RCX: 00007f6f5199a9c7 RDX: 00007f6f5240ba00 RSI: 0000000000000000 RDI: 000055837b0fc9a3 RBP: 00007ffeaf5db140 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007ffeaf5de020 R15: 00007ffeaf5db630