INFO: task syz-executor.0:9890 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:27608 pid: 9890 ppid: 8477 flags:0x00000004 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] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007fcdeadd9188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fffe8f7369f R14: 00007fcdeadd9300 R15: 0000000000022000 INFO: task syz-executor.2:9889 blocked for more than 144 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27160 pid: 9889 ppid: 8478 flags:0x00004004 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] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f09f5289188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fff4bc9edaf R14: 00007f09f5289300 R15: 0000000000022000 INFO: task syz-executor.4:9924 blocked for more than 145 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:27704 pid: 9924 ppid: 8480 flags:0x00004004 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] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f619798a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffd2e981b1f R14: 00007f619798a300 R15: 0000000000022000 INFO: task syz-executor.1:9951 blocked for more than 146 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:26656 pid: 9951 ppid: 8483 flags:0x00004004 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] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007fd2cdd18188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fffd6ccc31f R14: 00007fd2cdd18300 R15: 0000000000022000 INFO: task syz-executor.5:9972 blocked for more than 146 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:27704 pid: 9972 ppid: 8482 flags:0x00004004 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] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f4452e9c188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffd38ba4c3f R14: 00007f4452e9c300 R15: 0000000000022000 INFO: task syz-executor.3:9969 blocked for more than 147 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27704 pid: 9969 ppid: 8476 flags:0x00004004 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] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f9e4a50a188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002100 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007fff55d387bf R14: 00007f9e4a50a300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1658: #0: ffffffff8bd73da0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6259 1 lock held by in:imklog/8174: #0: ffff88801d3bc870 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 3 locks held by kworker/0:4/9795: #0: ffff8880b9c34c58 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1320 [inline] #0: ffff8880b9c34c58 (&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 #2: ffffffff8fd50928 (&obj_hash[i].lock){-.-.}-{2:2}, at: __debug_check_no_obj_freed lib/debugobjects.c:975 [inline] #2: ffffffff8fd50928 (&obj_hash[i].lock){-.-.}-{2:2}, at: debug_check_no_obj_freed+0xc7/0x420 lib/debugobjects.c:1018 3 locks held by syz-executor.0/9873: 1 lock held by syz-executor.0/9890: #0: ffff88803de10150 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88803de10150 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 3 locks held by syz-executor.2/9872: 1 lock held by syz-executor.2/9889: #0: ffff88803de08150 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88803de08150 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 3 locks held by syz-executor.4/9900: 1 lock held by syz-executor.4/9924: #0: ffff88803de11590 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88803de11590 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 4 locks held by syz-executor.1/9905: 1 lock held by syz-executor.1/9951: #0: ffff88803de11c50 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88803de11c50 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 3 locks held by syz-executor.5/9957: 1 lock held by syz-executor.5/9972: #0: ffff88803de08ed0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88803de08ed0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 3 locks held by syz-executor.3/9958: 1 lock held by syz-executor.3/9969: #0: ffff88803de129d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88803de129d0 (&type->i_mutex_dir_key#9){+.+.}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2198 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1658 Comm: khungtaskd Not tainted 5.11.0-rc6-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: 9905 Comm: syz-executor.1 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_kcov_mode+0x2c/0x40 kernel/kcov.c:174 Code: 05 39 23 8f 7e 89 c2 81 e2 00 01 00 00 a9 00 01 ff 00 74 10 31 c0 85 d2 74 15 8b 96 cc 14 00 00 85 d2 74 0b 8b 86 a8 14 00 00 <39> f8 0f 94 c0 c3 66 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 00 31 c0 RSP: 0018:ffffc9000b147928 EFLAGS: 00000246 RAX: 0000000000000000 RBX: ffff88803de11d08 RCX: ffff88802dd5b780 RDX: 0000000000000000 RSI: ffff88802dd5b780 RDI: 0000000000000003 RBP: ffff88803de11b88 R08: 0000000000000001 R09: 000000001cfdc001 R10: ffffffff83d82395 R11: 0000000000000000 R12: 0000000000000002 R13: ffff88801cfdc001 R14: ffff88803de11b88 R15: ffffc9000b147a28 FS: 00007fd2cdd5a700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ff949b5f000 CR3: 0000000016e10000 CR4: 0000000000350ef0 Call Trace: write_comp_data kernel/kcov.c:218 [inline] __sanitizer_cov_trace_const_cmp1+0x22/0x80 kernel/kcov.c:270 arch_atomic_try_cmpxchg arch/x86/include/asm/atomic.h:202 [inline] arch_atomic_fetch_add_unless include/linux/atomic-arch-fallback.h:1163 [inline] arch_atomic_add_unless include/linux/atomic-arch-fallback.h:1183 [inline] atomic_add_unless include/asm-generic/atomic-instrumented.h:789 [inline] _atomic_dec_and_lock+0x85/0x100 lib/dec_and_lock.c:24 iput.part.0+0x67/0x810 fs/inode.c:1671 iput+0x58/0x70 fs/inode.c:1669 fuse_iget+0x24e/0x610 fs/fuse/inode.c:356 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_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 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 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fd2cdd5a188 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000240 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60 R13: 00007fffd6ccc31f R14: 00007fd2cdd5a300 R15: 0000000000022000