INFO: task syz-executor.3:14868 blocked for more than 143 seconds. Not tainted 5.11.0-rc3-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:27152 pid:14868 ppid: 8481 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4313 [inline] __schedule+0x90c/0x21a0 kernel/sched/core.c:5064 schedule+0xcf/0x270 kernel/sched/core.c:5143 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:2195 do_new_mount_fc fs/namespace.c:2821 [inline] do_new_mount fs/namespace.c:2880 [inline] path_mount+0x1787/0x20c0 fs/namespace.c:3208 do_mount fs/namespace.c:3221 [inline] __do_sys_mount fs/namespace.c:3429 [inline] __se_sys_mount fs/namespace.c:3406 [inline] __x64_sys_mount+0x27f/0x300 fs/namespace.c:3406 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007f980b775c68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000020002140 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 000000000119bfd0 R08: 00000000200065c0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119bf8c R13: 00007ffe872034df R14: 00007f980b7769c0 R15: 000000000119bf8c Showing all locks held in the system: 3 locks held by kworker/u4:8/280: #0: ffff8880b9f34d18 (&rq->lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1319 [inline] #0: ffff8880b9f34d18 (&rq->lock){-.-.}-{2:2}, at: __schedule+0x217/0x21a0 kernel/sched/core.c:4981 #1: ffff8880b9f20088 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x305/0x440 kernel/sched/psi.c:833 #2: ffff8880737e0cc0 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1017 [inline] #2: ffff8880737e0cc0 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_rx_queued_mgmt+0xe9/0x1870 net/mac80211/ibss.c:1631 1 lock held by khungtaskd/1650: #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254 1 lock held by systemd-journal/4877: 1 lock held by in:imklog/8364: #0: ffff8880197e63b0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 2 locks held by agetty/8372: #0: ffff88801129b098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x22/0x80 drivers/tty/tty_ldisc.c:266 #1: ffffc9000130b2e8 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x21d/0x1aa0 drivers/tty/n_tty.c:2158 1 lock held by syz-executor.3/14868: #0: ffff88807b268190 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff88807b268190 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x8a/0x2e0 fs/namespace.c:2195 2 locks held by syz-executor.3/14871: ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1650 Comm: khungtaskd Not tainted 5.11.0-rc3-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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 4877 Comm: systemd-journal Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:check_kcov_mode+0x26/0x40 kernel/kcov.c:165 Code: cc cc cc cc 65 8b 05 c9 2b 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 0f 1f 40 00 66 2e 0f 1f 84 00 RSP: 0018:ffffc90001277938 EFLAGS: 00000046 RAX: 0000000080000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffff88801438a3c0 RDI: 0000000000000003 RBP: ffff88807bb34000 R08: 0000000000000000 R09: 000000000000002e R10: ffffffff81789a43 R11: 000000000000003f R12: 0000000000000000 R13: 0000000000000200 R14: dffffc0000000000 R15: ffffc900012779b0 FS: 00007fd7be55f8c0(0000) GS:ffff8880b9f00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fd7bbd3c000 CR3: 0000000013de8000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: write_comp_data kernel/kcov.c:218 [inline] __sanitizer_cov_trace_const_cmp4+0x1c/0x70 kernel/kcov.c:284 trace_hardirqs_off+0x23/0x1b0 kernel/trace/trace_preemptirq.c:78 qlink_free mm/kasan/quarantine.c:138 [inline] qlist_free_all+0x89/0x100 mm/kasan/quarantine.c:165 quarantine_reduce+0x180/0x200 mm/kasan/quarantine.c:272 ____kasan_kmalloc.constprop.0+0x95/0xa0 mm/kasan/common.c:412 kasan_slab_alloc include/linux/kasan.h:209 [inline] slab_post_alloc_hook mm/slab.h:512 [inline] slab_alloc mm/slab.c:3315 [inline] kmem_cache_alloc+0x1ab/0x4c0 mm/slab.c:3486 kmem_cache_zalloc include/linux/slab.h:672 [inline] lsm_file_alloc security/security.c:569 [inline] security_file_alloc+0x34/0x170 security/security.c:1457 __alloc_file+0xd8/0x280 fs/file_table.c:106 alloc_empty_file+0x6d/0x170 fs/file_table.c:150 path_openat+0xe3/0x2730 fs/namei.c:3357 do_filp_open+0x17e/0x3c0 fs/namei.c:3398 do_sys_openat2+0x16d/0x420 fs/open.c:1172 do_sys_open fs/open.c:1188 [inline] __do_sys_open fs/open.c:1196 [inline] __se_sys_open fs/open.c:1192 [inline] __x64_sys_open+0x119/0x1c0 fs/open.c:1192 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x7fd7bdaef840 Code: 73 01 c3 48 8b 0d 68 77 20 00 f7 d8 64 89 01 48 83 c8 ff c3 66 0f 1f 44 00 00 83 3d 89 bb 20 00 00 75 10 b8 02 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 31 c3 48 83 ec 08 e8 1e f6 ff ff 48 89 04 24 RSP: 002b:00007ffefc7f3748 EFLAGS: 00000246 ORIG_RAX: 0000000000000002 RAX: ffffffffffffffda RBX: 00007ffefc7f3a50 RCX: 00007fd7bdaef840 RDX: 00000000000001a0 RSI: 0000000000080042 RDI: 0000559581862e20 RBP: 000000000000000d R08: 00000000000021e0 R09: 00000000ffffffff R10: 0000000000000069 R11: 0000000000000246 R12: 00000000ffffffff R13: 0000559581855060 R14: 00007ffefc7f3a10 R15: 0000559581861d50