INFO: task syz-executor.1:1106 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.1 state:D stack:29072 pid: 1106 ppid: 8483 flags:0x20000004 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] vfs_setxattr+0x117/0x320 fs/xattr.c:290 setxattr+0x1ff/0x290 fs/xattr.c:553 path_setxattr+0x170/0x190 fs/xattr.c:572 __do_sys_lsetxattr fs/xattr.c:594 [inline] __se_sys_lsetxattr fs/xattr.c:590 [inline] __ia32_sys_lsetxattr+0xb9/0x150 fs/xattr.c:590 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f92549 RSP: 002b:00000000f556b5fc EFLAGS: 00000296 ORIG_RAX: 00000000000000e3 RAX: ffffffffffffffda RBX: 0000000020000080 RCX: 0000000020000180 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 INFO: task syz-executor.1:1127 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.1 state:D stack:27776 pid: 1127 ppid: 8483 flags:0x20004004 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] __ia32_sys_mount+0x27e/0x300 fs/namespace.c:3409 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f92549 RSP: 002b:00000000f55295fc EFLAGS: 00000296 ORIG_RAX: 0000000000000015 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000200042c0 RDX: 0000000020002100 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Showing all locks held in the system: 1 lock held by khungtaskd/1659: #0: ffffffff8bf73ee0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 1 lock held by in:imklog/8153: #0: ffff8880139c7270 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 2 locks held by agetty/8158: #0: ffff88801bb3f098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc90000f882e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x21d/0x1aa0 drivers/tty/n_tty.c:2155 2 locks held by agetty/8161: #0: ffff888022360098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc90000f5c2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x21d/0x1aa0 drivers/tty/n_tty.c:2155 2 locks held by syz-fuzzer/8440: #0: ffff8880b9c34e18 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline] #0: ffff8880b9c34e18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4995 #1: ffff8880b9c20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 4 locks held by syz-executor.1/1099: 2 locks held by syz-executor.1/1106: #0: ffff888099be6460 (sb_writers#18){.+.+}-{0:0}, at: path_setxattr+0xb5/0x190 fs/xattr.c:570 #1: ffff888064211590 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff888064211590 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: vfs_setxattr+0x117/0x320 fs/xattr.c:290 1 lock held by syz-executor.1/1127: #0: ffff888064211590 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff888064211590 (&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: 1659 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+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: 1099 Comm: syz-executor.1 Not tainted 5.11.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:hlock_class kernel/locking/lockdep.c:198 [inline] RIP: 0010:__lock_acquire+0xbe4/0x54f0 kernel/locking/lockdep.c:4829 Code: 20 66 81 e3 ff 1f 0f b7 db be 08 00 00 00 48 89 d8 48 c1 f8 06 48 8d 3c c5 a0 e7 a7 8f e8 b4 8f 5d 00 48 0f a3 1d ac 5a 4f 0e <0f> 83 87 0c 00 00 48 8d 1c 5b 48 c1 e3 06 48 81 c3 c0 eb a7 8f 48 RSP: 0018:ffffc9000951f710 EFLAGS: 00000047 RAX: 0000000000000001 RBX: 00000000000002a9 RCX: ffffffff81588cec RDX: fffffbfff1f4fcff RSI: 0000000000000008 RDI: ffffffff8fa7e7f0 RBP: ffff88801240b780 R08: 0000000000000000 R09: ffffffff8fa7e7f7 R10: fffffbfff1f4fcfe R11: 0000000000000001 R12: ffff88801240c180 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0063) knlGS:00000000f558cb40 CS: 0010 DS: 002b ES: 002b CR0: 0000000080050033 CR2: 00007fe918033d70 CR3: 0000000085d4a000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lock_acquire kernel/locking/lockdep.c:5442 [inline] lock_acquire+0x1a8/0x720 kernel/locking/lockdep.c:5407 __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_hash+0x117/0x180 fs/namei.c:1445 filename_create+0x186/0x490 fs/namei.c:3470 user_path_create fs/namei.c:3527 [inline] do_mkdirat+0xa0/0x2d0 fs/namei.c:3667 do_syscall_32_irqs_on arch/x86/entry/common.c:77 [inline] __do_fast_syscall_32+0x56/0x80 arch/x86/entry/common.c:139 do_fast_syscall_32+0x2f/0x70 arch/x86/entry/common.c:164 entry_SYSENTER_compat_after_hwframe+0x4d/0x5c RIP: 0023:0xf7f92549 Code: 03 74 c0 01 10 05 03 74 b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f558c5fc EFLAGS: 00000296 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 0000000020000240 RCX: 0000000000000000 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000