INFO: task syz-executor.4:22666 blocked for more than 143 seconds. Not tainted 5.15.148-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:29056 pid:22666 ppid: 18783 flags:0x00004006 Call Trace: context_switch kernel/sched/core.c:5030 [inline] __schedule+0x12c4/0x45b0 kernel/sched/core.c:6376 schedule+0x11b/0x1f0 kernel/sched/core.c:6459 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6518 rwsem_down_read_slowpath+0x605/0xb40 kernel/locking/rwsem.c:1047 __down_read_common kernel/locking/rwsem.c:1231 [inline] __down_read kernel/locking/rwsem.c:1244 [inline] down_read+0x9a/0x2e0 kernel/locking/rwsem.c:1490 iterate_supers+0xac/0x1e0 fs/super.c:703 ksys_sync+0xb9/0x1c0 fs/sync.c:102 __do_sys_sync+0xa/0x10 fs/sync.c:113 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+0x61/0xcb RIP: 0033:0x7f73fa0d1da9 RSP: 002b:00007f73f86520c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f73fa1fff80 RCX: 00007f73fa0d1da9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f73fa11e47a R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 000000000000000b R14: 00007f73fa1fff80 R15: 00007ffd1a2eae48 Showing all locks held in the system: 1 lock held by khungtaskd/26: #0: ffffffff8c91f220 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 2 locks held by getty/3259: #0: ffff888024a41098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:252 #1: ffffc9000229b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x6af/0x1db0 drivers/tty/n_tty.c:2158 2 locks held by kworker/u4:13/21031: 1 lock held by syz-executor.4/5904: #0: ffff88809257e0e0 (&type->s_umount_key#92/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 3 locks held by kworker/u4:16/5975: 1 lock held by syz-executor.4/7065: #0: ffff88808d7f00e0 (&type->s_umount_key#92/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 1 lock held by syz-executor.4/8221: #0: ffff88807ddd00e0 (&type->s_umount_key#92/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 2 locks held by kworker/0:7/9276: #0: ffff888011c72538 ((wq_completion)rcu_gp){+.+.}-{0:0}, at: process_one_work+0x78a/0x10c0 kernel/workqueue.c:2283 #1: ffffc900046dfd20 ((work_completion)(&rew.rew_work)){+.+.}-{0:0}, at: process_one_work+0x7d0/0x10c0 kernel/workqueue.c:2285 1 lock held by syz-executor.4/9421: #0: ffff8880797940e0 (&type->s_umount_key#92/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 1 lock held by syz-executor.4/10665: #0: ffff88807e1380e0 (&type->s_umount_key#92/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 1 lock held by syz-executor.4/11456: #0: ffff88808e9a40e0 (&type->s_umount_key#92/1){+.+.}-{3:3}, at: alloc_super+0x210/0x940 fs/super.c:229 1 lock held by syz-executor.4/22666: #0: ffff88809257e0e0 (&type->s_umount_key#105){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by syz-executor.4/22929: #0: ffffffff8c9237e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:322 [inline] #0: ffffffff8c9237e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x350/0x740 kernel/rcu/tree_exp.h:845 1 lock held by syz-executor.0/23757: #0: ffff88809257e0e0 (&type->s_umount_key#105){++++}-{3:3}, at: iterate_supers+0xac/0x1e0 fs/super.c:703 1 lock held by udevd/23937: #0: ffff88801b5b8918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0x14d/0xa50 block/bdev.c:817 2 locks held by syz-executor.1/28538: #0: ffff88801b5b8918 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_put+0xfb/0x790 block/bdev.c:912 #1: ffff88801b5b0468 (&lo->lo_mutex){+.+.}-{3:3}, at: lo_release+0x4d/0x1f0 drivers/block/loop.c:2070 1 lock held by syz-executor.2/28569: #0: ffff88801b5b3468 (&lo->lo_mutex){+.+.}-{3:3}, at: __loop_clr_fd+0xa9/0xbe0 drivers/block/loop.c:1365 3 locks held by syz-executor.3/28594: 1 lock held by syz-executor.0/28600: #0: ffffffff8c9237e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: exp_funnel_lock kernel/rcu/tree_exp.h:290 [inline] #0: ffffffff8c9237e8 (rcu_state.exp_mutex){+.+.}-{3:3}, at: synchronize_rcu_expedited+0x280/0x740 kernel/rcu/tree_exp.h:845 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 26 Comm: khungtaskd Not tainted 5.15.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106 nmi_cpu_backtrace+0x46a/0x4a0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x181/0x2a0 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xe72/0xeb0 kernel/hung_task.c:295 kthread+0x3f6/0x4f0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:298 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 23949 Comm: udevd Not tainted 5.15.148-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/25/2024 RIP: 0010:get_current arch/x86/include/asm/current.h:15 [inline] RIP: 0010:write_comp_data kernel/kcov.c:217 [inline] RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x4/0x80 kernel/kcov.c:270 Code: 48 c7 44 11 08 06 00 00 00 48 89 7c 11 10 48 89 74 11 18 4c 89 44 11 20 49 ff c2 4c 89 12 c3 0f 1f 80 00 00 00 00 4c 8b 04 24 <65> 48 8b 15 94 3f 82 7e 65 8b 05 95 3f 82 7e a9 00 01 ff 00 74 10 RSP: 0018:ffffc9000ccff580 EFLAGS: 00000286 RAX: ffff888141bc2d00 RBX: 0000000000000001 RCX: ffff888141bc2d00 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 000000000000002a RBP: 0000000000000001 R08: ffffffff83c5bc2b R09: ffffffff83c5ada8 R10: 0000000000000002 R11: ffff8880139abb80 R12: ffffffff91568b60 R13: dffffc0000000000 R14: ffff888141bc2d00 R15: 0000000000000001 FS: 00007ff3a74d7c80(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055d9e3677990 CR3: 000000009371e000 CR4: 00000000003506e0 Call Trace: tomoyo_get_mode+0x4b/0x1e0 security/tomoyo/util.c:1001 tomoyo_path_permission+0xf9/0x360 security/tomoyo/file.c:579 tomoyo_check_open_permission+0x2e6/0x490 security/tomoyo/file.c:777 security_file_open+0x5f/0xa0 security/security.c:1650 do_dentry_open+0x315/0xfb0 fs/open.c:813 do_open fs/namei.c:3614 [inline] path_openat+0x2702/0x2f20 fs/namei.c:3748 do_filp_open+0x21c/0x460 fs/namei.c:3775 do_sys_openat2+0x13b/0x500 fs/open.c:1211 do_sys_open fs/open.c:1227 [inline] __do_sys_openat fs/open.c:1243 [inline] __se_sys_openat fs/open.c:1238 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1238 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+0x61/0xcb RIP: 0033:0x7ff3a76029a4 Code: 24 20 48 8d 44 24 30 48 89 44 24 28 64 8b 04 25 18 00 00 00 85 c0 75 2c 44 89 e2 48 89 ee bf 9c ff ff ff b8 01 01 00 00 0f 05 <48> 3d 00 f0 ff ff 76 60 48 8b 15 55 a4 0d 00 f7 d8 64 89 02 48 83 RSP: 002b:00007ffd5a6faa10 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000055d9e3674020 RCX: 00007ff3a76029a4 RDX: 0000000000080000 RSI: 000055d9e3651300 RDI: 00000000ffffff9c RBP: 000055d9e3651300 R08: 000055d9e3651300 R09: 00007ff3a76ddb10 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000080000 R13: 0000000000000704 R14: 0000000000000000 R15: 0000000000000001