INFO: task syz-executor.2:31272 blocked for more than 143 seconds. Not tainted 5.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:22552 pid:31272 ppid: 8450 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5938 schedule+0x14b/0x210 kernel/sched/core.c:6017 schedule_timeout+0x98/0x2f0 kernel/time/timer.c:1857 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x48/0x60 kernel/sched/completion.c:138 xfs_buf_iowait fs/xfs/xfs_buf.c:1571 [inline] __xfs_buf_submit+0x39d/0x6d0 fs/xfs/xfs_buf.c:1636 xfs_buf_submit fs/xfs/xfs_buf.c:58 [inline] xfs_buf_read_uncached+0x1fa/0x390 fs/xfs/xfs_buf.c:884 xfs_readsb+0x1dc/0x670 fs/xfs/xfs_mount.c:178 xfs_fs_fill_super+0x483/0x1780 fs/xfs/xfs_super.c:1428 get_tree_bdev+0x406/0x630 fs/super.c:1293 vfs_get_tree+0x86/0x270 fs/super.c:1498 do_new_mount fs/namespace.c:2923 [inline] path_mount+0x1981/0x2c10 fs/namespace.c:3253 do_mount fs/namespace.c:3266 [inline] __do_sys_mount fs/namespace.c:3474 [inline] __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3451 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f23d78be188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056bf80 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056bf80 R13: 00007ffd1f5ad84f R14: 00007f23d78be300 R15: 0000000000022000 INFO: task syz-executor.2:31318 blocked for more than 143 seconds. Not tainted 5.14.0-rc7-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:26080 pid:31318 ppid: 8450 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4681 [inline] __schedule+0xc07/0x11f0 kernel/sched/core.c:5938 schedule+0x14b/0x210 kernel/sched/core.c:6017 rwsem_down_write_slowpath+0xec7/0x14c0 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x165/0x170 kernel/locking/rwsem.c:1407 grab_super+0x58/0x190 fs/super.c:389 sget_fc+0x1e4/0x660 fs/super.c:562 get_tree_bdev+0x274/0x630 fs/super.c:1263 vfs_get_tree+0x86/0x270 fs/super.c:1498 do_new_mount fs/namespace.c:2923 [inline] path_mount+0x1981/0x2c10 fs/namespace.c:3253 do_mount fs/namespace.c:3266 [inline] __do_sys_mount fs/namespace.c:3474 [inline] __se_sys_mount+0x2f9/0x3b0 fs/namespace.c:3451 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665e9 RSP: 002b:00007f23d787c188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665e9 RDX: 0000000020000140 RSI: 0000000020000000 RDI: 00000000200000c0 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000008002 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffd1f5ad84f R14: 00007f23d787c300 R15: 0000000000022000 Showing all locks held in the system: 2 locks held by kworker/u4:5/211: #0: ffff8880b9c51558 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested+0x1b/0x30 kernel/sched/core.c:460 #1: ffff8880b9c1f888 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x4ad/0x820 kernel/sched/psi.c:871 1 lock held by khungtaskd/1646: #0: ffffffff8c717ec0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 2 locks held by agetty/8151: #0: ffff88801e6f3098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900010fc2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1c30 drivers/tty/n_tty.c:2113 2 locks held by agetty/8152: #0: ffff8880194bc098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc900010ac2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6b1/0x1c30 drivers/tty/n_tty.c:2113 1 lock held by syz-executor.2/31272: #0: ffff88807baaa0e0 (&type->s_umount_key#67/1){+.+.}-{3:3}, at: alloc_super+0x1c8/0x860 fs/super.c:229 2 locks held by syz-executor.2/31318: #0: ffff888145739198 (&bdev->bd_fsfreeze_mutex){+.+.}-{3:3}, at: get_tree_bdev+0x19d/0x630 fs/super.c:1253 #1: ffff88807baaa0e0 (&type->s_umount_key#90){+.+.}-{3:3}, at: grab_super+0x58/0x190 fs/super.c:389 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1646 Comm: khungtaskd Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1d3/0x29f lib/dump_stack.c:105 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:210 [inline] watchdog+0xd06/0xd50 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4854 Comm: systemd-journal Not tainted 5.14.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:__lock_acquire+0x1b6/0x6100 kernel/locking/lockdep.c:4914 Code: ac 24 88 00 00 00 44 89 bc 24 d8 00 00 00 4c 8b 7c 24 58 4d 8d a7 e8 09 00 00 4c 89 e0 48 c1 e8 03 48 89 44 24 70 42 8a 04 00 <84> c0 0f 85 9b 28 00 00 45 8b 2c 24 48 c7 c0 c0 b7 70 90 48 c1 e8 RSP: 0018:ffffc900011d7280 EFLAGS: 00000806 RAX: 1ffff11002739800 RBX: ffffffff8f87fe40 RCX: 1ffff9200023ae70 RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801ae940a8 RBP: ffffc900011d7610 R08: dffffc0000000000 R09: 0000000000000000 R10: fffffbfff1b74ee6 R11: 0000000000000000 R12: ffff8880139cc268 R13: 0000000000000000 R14: 0000000000000000 R15: ffff8880139cb880 FS: 00007f95943248c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9591787000 CR3: 000000002df8d000 CR4: 00000000001526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600 Call Trace: lock_acquire+0x182/0x4a0 kernel/locking/lockdep.c:5625 __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] __d_lookup+0x1ef/0x720 fs/dcache.c:2428 lookup_fast+0xde/0x7c0 fs/namei.c:1604 walk_component+0xc9/0x740 fs/namei.c:1955 link_path_walk+0x697/0xd00 fs/namei.c:2282 path_parentat fs/namei.c:2486 [inline] filename_parentat+0x265/0x8b0 fs/namei.c:2508 filename_create+0xbf/0x700 fs/namei.c:3585 user_path_create fs/namei.c:3660 [inline] do_mkdirat+0xaf/0x3e0 fs/namei.c:3838 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f95935df687 Code: 00 b8 ff ff ff ff c3 0f 1f 40 00 48 8b 05 09 d8 2b 00 64 c7 00 5f 00 00 00 b8 ff ff ff ff c3 0f 1f 40 00 b8 53 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 8b 0d e1 d7 2b 00 f7 d8 64 89 01 48 RSP: 002b:00007ffd97356218 EFLAGS: 00000293 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007ffd97359280 RCX: 00007f95935df687 RDX: 0000000000000000 RSI: 00000000000001ed RDI: 00005567729b88a0 RBP: 00007ffd97356250 R08: 0000556770fa73e5 R09: 0000000000000018 R10: 0000000000000069 R11: 0000000000000293 R12: 0000000000000000 R13: 0000000000000001 R14: 00005567729b88a0 R15: 00007ffd97356890 ---------------- Code disassembly (best guess): 0: ac lods %ds:(%rsi),%al 1: 24 88 and $0x88,%al 3: 00 00 add %al,(%rax) 5: 00 44 89 bc add %al,-0x44(%rcx,%rcx,4) 9: 24 d8 and $0xd8,%al b: 00 00 add %al,(%rax) d: 00 4c 8b 7c add %cl,0x7c(%rbx,%rcx,4) 11: 24 58 and $0x58,%al 13: 4d 8d a7 e8 09 00 00 lea 0x9e8(%r15),%r12 1a: 4c 89 e0 mov %r12,%rax 1d: 48 c1 e8 03 shr $0x3,%rax 21: 48 89 44 24 70 mov %rax,0x70(%rsp) 26: 42 8a 04 00 mov (%rax,%r8,1),%al * 2a: 84 c0 test %al,%al <-- trapping instruction 2c: 0f 85 9b 28 00 00 jne 0x28cd 32: 45 8b 2c 24 mov (%r12),%r13d 36: 48 c7 c0 c0 b7 70 90 mov $0xffffffff9070b7c0,%rax 3d: 48 rex.W 3e: c1 .byte 0xc1 3f: e8 .byte 0xe8