INFO: task syz-executor.1:9922 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28208 pid: 9922 ppid: 8386 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_read_slowpath+0x4df/0x920 kernel/locking/rwsem.c:992 __down_read_common+0x65/0x390 kernel/locking/rwsem.c:1213 inode_lock_shared include/linux/fs.h:785 [inline] lookup_slow fs/namei.c:1642 [inline] walk_component+0x448/0x6b0 fs/namei.c:1939 lookup_last fs/namei.c:2396 [inline] path_lookupat+0x19d/0x9b0 fs/namei.c:2420 filename_lookup+0x1b0/0x5e0 fs/namei.c:2453 user_path_at include/linux/namei.h:60 [inline] do_mount fs/namespace.c:3243 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount+0x24e/0x320 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fa8fe2ed188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465ef9 RDX: 0000000000000000 RSI: 0000000020000040 RDI: 0000000000000000 RBP: 00000000004bfa34 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffe55ab72df R14: 00007fa8fe2ed300 R15: 0000000000022000 INFO: task syz-executor.1:9929 blocked for more than 143 seconds. Not tainted 5.12.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:27824 pid: 9929 ppid: 8386 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:2216 do_new_mount_fc fs/namespace.c:2846 [inline] do_new_mount fs/namespace.c:2905 [inline] path_mount+0x20b2/0x29a0 fs/namespace.c:3233 do_mount fs/namespace.c:3246 [inline] __do_sys_mount fs/namespace.c:3454 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3431 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x465ef9 RSP: 002b:00007fa8fe2cc188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465ef9 RDX: 0000000020002000 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004bfa34 R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffe55ab72df R14: 00007fa8fe2cc300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1643: #0: ffffffff8c70fcc0 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8089: #0: ffff8880213a80f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:961 3 locks held by syz-executor.1/9911: 1 lock held by syz-executor.1/9922: #0: ffff888032910150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:785 [inline] #0: ffff888032910150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1642 [inline] #0: ffff888032910150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x448/0x6b0 fs/namei.c:1939 1 lock held by syz-executor.1/9929: #0: ffff888032910150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #0: ffff888032910150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2216 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1643 Comm: khungtaskd Not tainted 5.12.0-rc1-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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 4818 Comm: systemd-journal Not tainted 5.12.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:rcu_lockdep_current_cpu_online+0x9c/0x130 kernel/rcu/tree.c:1219 Code: 00 48 8d b8 98 5a 03 00 48 89 f8 48 c1 e8 03 42 80 3c 38 00 74 05 e8 73 f8 57 00 4c 8b 73 18 48 83 c3 20 48 89 d8 48 c1 e8 03 <42> 80 3c 38 00 74 08 48 89 df e8 55 f8 57 00 4c 8b 23 49 8d 5e 70 RSP: 0018:ffffc9000115fe20 EFLAGS: 00000a02 RAX: 1ffff11017386b54 RBX: ffff8880b9c35aa0 RCX: 0000000080000001 RDX: 0000000000000000 RSI: 0000000000000002 RDI: ffff8880b9c35a98 RBP: ffffffff814fade5 R08: dffffc0000000000 R09: fffffbfff1b6adc6 R10: fffffbfff1b6adc6 R11: 0000000000000000 R12: dffffc0000000000 R13: 0000000000000000 R14: ffffffff8c713c80 R15: dffffc0000000000 FS: 00007f39b711f8c0(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f39b452f000 CR3: 0000000025cac000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: rcu_read_lock_held_common kernel/rcu/update.c:112 [inline] rcu_read_lock_sched_held+0x2c/0xb0 kernel/rcu/update.c:123 trace_lock_release+0x61/0x140 include/trace/events/lock.h:58 lock_release+0x27/0x6b0 kernel/locking/lockdep.c:5521 rcu_read_unlock include/linux/rcupdate.h:710 [inline] __task_pid_nr_ns+0x340/0x3e0 kernel/pid.c:501 task_tgid_vnr include/linux/sched.h:1473 [inline] __do_sys_getpid+0x1a/0x20 kernel/sys.c:907 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f39b63b7f17 Code: ff ff ff 48 8b 4d a0 0f b7 51 fe 48 8b 4d a8 66 89 54 08 fe e9 1a ff ff ff 66 2e 0f 1f 84 00 00 00 00 00 b8 27 00 00 00 0f 05 0f 1f 84 00 00 00 00 00 b8 6e 00 00 00 0f 05 c3 0f 1f 84 00 00 RSP: 002b:00007fff771f1708 EFLAGS: 00000202 ORIG_RAX: 0000000000000027 RAX: ffffffffffffffda RBX: 0000558d27c5e1e0 RCX: 00007f39b63b7f17 RDX: 00007fff771f17c8 RSI: 0000000000000001 RDI: 0000558d27c5e1e0 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000069 R11: 0000000000000202 R12: 00007fff771f17c8 R13: 00000000000012d2 R14: 00007fff771f45b0 R15: 00007fff771f1bc0