INFO: task syz-executor.5:22399 blocked for more than 143 seconds. Not tainted 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29856 pid:22399 ppid: 26398 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 rwsem_down_write_slowpath+0x7c2/0x11d0 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_nested+0x13b/0x150 kernel/locking/rwsem.c:1517 inode_lock_nested include/linux/fs.h:809 [inline] lock_rename+0x225/0x280 fs/namei.c:2846 do_renameat2+0x61c/0xcb0 fs/namei.c:4637 __do_sys_rename fs/namei.c:4745 [inline] __se_sys_rename fs/namei.c:4743 [inline] __x64_sys_rename+0x7d/0xa0 fs/namei.c:4743 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f5b91caa188 EFLAGS: 00000246 ORIG_RAX: 0000000000000052 RAX: ffffffffffffffda RBX: 000000000056c038 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000020000140 RDI: 0000000020000080 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007ffd28ea364f R14: 00007f5b91caa300 R15: 0000000000022000 INFO: task syz-executor.5:22432 blocked for more than 143 seconds. Not tainted 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:28904 pid:22432 ppid: 26398 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 rwsem_down_read_slowpath+0x4c5/0x990 kernel/locking/rwsem.c:992 __down_read_common kernel/locking/rwsem.c:1213 [inline] __down_read kernel/locking/rwsem.c:1222 [inline] down_read+0xe4/0x440 kernel/locking/rwsem.c:1355 inode_lock_shared include/linux/fs.h:784 [inline] lookup_slow fs/namei.c:1645 [inline] walk_component+0x409/0x6a0 fs/namei.c:1942 lookup_last fs/namei.c:2397 [inline] path_lookupat+0x1ba/0x850 fs/namei.c:2421 filename_lookup+0x1b1/0x570 fs/namei.c:2454 user_path_at include/linux/namei.h:60 [inline] __do_sys_chdir fs/open.c:493 [inline] __se_sys_chdir fs/open.c:487 [inline] __x64_sys_chdir+0xb7/0x260 fs/open.c:487 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f5b91c89188 EFLAGS: 00000246 ORIG_RAX: 0000000000000050 RAX: ffffffffffffffda RBX: 000000000056c0f0 RCX: 00000000004665d9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000200000c0 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffd28ea364f R14: 00007f5b91c89300 R15: 0000000000022000 INFO: task syz-executor.5:22433 blocked for more than 144 seconds. Not tainted 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.5 state:D stack:29936 pid:22433 ppid: 26398 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 rwsem_down_write_slowpath+0x7c2/0x11d0 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_nested+0x13b/0x150 kernel/locking/rwsem.c:1517 inode_lock_nested include/linux/fs.h:809 [inline] filename_create+0x15a/0x490 fs/namei.c:3592 user_path_create fs/namei.c:3650 [inline] do_mknodat.part.0+0xcd/0x4c0 fs/namei.c:3731 do_mknodat fs/namei.c:3773 [inline] __do_sys_mknod fs/namei.c:3775 [inline] __se_sys_mknod fs/namei.c:3773 [inline] __x64_sys_mknod+0xf8/0x120 fs/namei.c:3773 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f5b91c68188 EFLAGS: 00000246 ORIG_RAX: 0000000000000085 RAX: ffffffffffffffda RBX: 000000000056c1a8 RCX: 00000000004665d9 RDX: 000000000000070b RSI: 00000000ffffc000 RDI: 0000000020000180 RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c1a8 R13: 00007ffd28ea364f R14: 00007f5b91c68300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1629: #0: ffffffff8c179140 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/8168: #0: ffff888019143670 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:974 1 lock held by systemd-udevd/26652: #0: ffff8880b9c35b58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:460 [inline] #0: ffff8880b9c35b58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1307 [inline] #0: ffff8880b9c35b58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1610 [inline] #0: ffff8880b9c35b58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x22d/0x2710 kernel/sched/core.c:5854 1 lock held by systemd-udevd/26763: 2 locks held by syz-executor.5/22392: 2 locks held by syz-executor.5/22399: #0: ffff88809ab40460 (sb_writers#18){.+.+}-{0:0}, at: do_renameat2+0x386/0xcb0 fs/namei.c:4632 #1: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:809 [inline] #1: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: lock_rename+0x225/0x280 fs/namei.c:2846 1 lock held by syz-executor.5/22432: #0: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:784 [inline] #0: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1645 [inline] #0: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x409/0x6a0 fs/namei.c:1942 2 locks held by syz-executor.5/22433: #0: ffff88809ab40460 (sb_writers#18){.+.+}-{0:0}, at: filename_create+0x104/0x490 fs/namei.c:3587 #1: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:809 [inline] #1: ffff8880b2d96bc0 (&type->i_mutex_dir_key#8/1){+.+.}-{3:3}, at: filename_create+0x15a/0x490 fs/namei.c:3592 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1629 Comm: khungtaskd Not tainted 5.13.0-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_lvl+0xcd/0x134 lib/dump_stack.c:96 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+0xd4b/0xfb0 kernel/hung_task.c:294 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 11334 Comm: kworker/u4:8 Not tainted 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: bat_events batadv_nc_worker RIP: 0010:check_preemption_disabled+0x2/0x140 lib/smp_processor_id.c:13 Code: 1f 44 00 00 e8 9f d8 75 f8 65 48 8b 3c 25 00 f0 01 00 e8 d1 83 2f f8 eb 99 0f 1f 44 00 00 0f 0b e9 23 ff ff ff cc cc cc 41 56 <41> 55 49 89 f5 41 54 55 48 89 fd 53 0f 1f 44 00 00 65 44 8b 25 ed RSP: 0018:ffffc900099a7b70 EFLAGS: 00000046 RAX: 0000000000000000 RBX: 0000000000000003 RCX: 0000000000000001 RDX: 0000000000000000 RSI: ffffffff898bc160 RDI: ffffffff89e2e860 RBP: ffffffff8c179080 R08: 0000000000000000 R09: ffffffff8deb2457 R10: fffffbfff1bd648a R11: 0000000000000000 R12: ffff8880366ba000 R13: 0000000000000000 R14: 00000000ffffffff R15: ffff8880366baa40 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055aedda5a020 CR3: 00000000242e5000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: lockdep_recursion_finish kernel/locking/lockdep.c:438 [inline] lock_is_held_type+0xd5/0x140 kernel/locking/lockdep.c:5669 lock_is_held include/linux/lockdep.h:283 [inline] rcu_read_lock_sched_held+0x3a/0x70 kernel/rcu/update.c:125 trace_lock_release include/trace/events/lock.h:58 [inline] lock_release+0x5d3/0x720 kernel/locking/lockdep.c:5636 rcu_lock_release include/linux/rcupdate.h:272 [inline] rcu_read_unlock include/linux/rcupdate.h:725 [inline] batadv_nc_purge_orig_hash net/batman-adv/network-coding.c:408 [inline] batadv_nc_worker+0x7a3/0xe50 net/batman-adv/network-coding.c:715 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295