INFO: task udevd:4432 blocked for more than 143 seconds. Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:udevd state:D stack:19528 pid:4432 ppid:1 flags:0x00004000 Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6555 schedule+0xcb/0x190 kernel/sched/core.c:6631 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6690 __mutex_lock_common+0xe4f/0x26e0 kernel/locking/mutex.c:679 __mutex_lock kernel/locking/mutex.c:747 [inline] mutex_lock_nested+0x17/0x20 kernel/locking/mutex.c:799 blkdev_get_by_dev+0xfe/0xa60 block/bdev.c:813 blkdev_open+0x128/0x2e0 block/fops.c:478 do_dentry_open+0x85f/0x11b0 fs/open.c:882 do_open fs/namei.c:3557 [inline] path_openat+0x25ba/0x2dd0 fs/namei.c:3714 do_filp_open+0x264/0x4f0 fs/namei.c:3741 do_sys_openat2+0x124/0x4e0 fs/open.c:1310 do_sys_open fs/open.c:1326 [inline] __do_sys_openat fs/open.c:1342 [inline] __se_sys_openat fs/open.c:1337 [inline] __x64_sys_openat+0x243/0x290 fs/open.c:1337 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+0x63/0xcd RIP: 0033:0x7fac97725697 RSP: 002b:00007fffddf377e0 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007fac97725697 RDX: 00000000000a0800 RSI: 000055af51cba340 RDI: 00000000ffffff9c RBP: 000055af51cba340 R08: 0000000000000008 R09: 000055af4fd6f5a0 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000000a0800 R13: 000055af51c9aa20 R14: 000055af51cbaae0 R15: 0000000000000000 INFO: task syz-executor.0:17039 blocked for more than 143 seconds. Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:20512 pid:17039 ppid:5102 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6555 schedule+0xcb/0x190 kernel/sched/core.c:6631 io_schedule+0x83/0x100 kernel/sched/core.c:8811 bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbb/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x1c3/0x240 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:69 [inline] lock_buffer include/linux/buffer_head.h:397 [inline] __sync_dirty_buffer+0x107/0x330 fs/buffer.c:2732 __ext4_handle_dirty_metadata+0x29a/0x810 fs/ext4/ext4_jbd2.c:387 ext4_handle_dirty_dirblock+0x363/0x6b0 fs/ext4/namei.c:438 ext4_finish_convert_inline_dir+0x58a/0x700 fs/ext4/inline.c:1181 ext4_convert_inline_data_nolock+0x639/0x820 fs/ext4/inline.c:1258 ext4_try_add_inline_entry+0x683/0x990 fs/ext4/inline.c:1331 ext4_add_entry+0x5a4/0xeb0 fs/ext4/namei.c:2385 ext4_mkdir+0x557/0xcf0 fs/ext4/namei.c:3007 vfs_mkdir+0x3b3/0x590 fs/namei.c:4036 do_mkdirat+0x25b/0x530 fs/namei.c:4061 __do_sys_mkdir fs/namei.c:4081 [inline] __se_sys_mkdir fs/namei.c:4079 [inline] __x64_sys_mkdir+0x6a/0x80 fs/namei.c:4079 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+0x63/0xcd RIP: 0033:0x7f627428c0c9 RSP: 002b:00007f6274ff2168 EFLAGS: 00000246 ORIG_RAX: 0000000000000053 RAX: ffffffffffffffda RBX: 00007f62743ac050 RCX: 00007f627428c0c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000300 RBP: 00007f62742e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fffb1f0c8bf R14: 00007f6274ff2300 R15: 0000000000022000 INFO: task syz-executor.1:17030 blocked for more than 144 seconds. Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:21992 pid:17030 ppid:5105 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:5244 [inline] __schedule+0x995/0xe20 kernel/sched/core.c:6555 schedule+0xcb/0x190 kernel/sched/core.c:6631 io_schedule+0x83/0x100 kernel/sched/core.c:8811 bit_wait_io+0xe/0xc0 kernel/sched/wait_bit.c:209 __wait_on_bit_lock+0xbb/0x1a0 kernel/sched/wait_bit.c:90 out_of_line_wait_on_bit_lock+0x1c3/0x240 kernel/sched/wait_bit.c:117 wait_on_bit_lock_io include/linux/wait_bit.h:208 [inline] __lock_buffer fs/buffer.c:69 [inline] lock_buffer include/linux/buffer_head.h:397 [inline] __block_write_full_page+0x61e/0x1710 fs/buffer.c:1770 __writepage+0x60/0x120 mm/page-writeback.c:2537 write_cache_pages+0x7cd/0x1340 mm/page-writeback.c:2472 generic_writepages mm/page-writeback.c:2563 [inline] do_writepages+0x424/0x680 mm/page-writeback.c:2583 filemap_fdatawrite_wbc+0x11e/0x170 mm/filemap.c:388 __filemap_fdatawrite_range mm/filemap.c:421 [inline] __filemap_fdatawrite mm/filemap.c:427 [inline] filemap_fdatawrite+0x146/0x1d0 mm/filemap.c:432 sync_bdevs+0x242/0x320 block/bdev.c:1064 ksys_sync+0xdc/0x1c0 fs/sync.c:105 __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+0x63/0xcd RIP: 0033:0x7f942668c0c9 RSP: 002b:00007f94273b6168 EFLAGS: 00000246 ORIG_RAX: 00000000000000a2 RAX: ffffffffffffffda RBX: 00007f94267abf80 RCX: 00007f942668c0c9 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 00007f94266e7ae9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffd3949cedf R14: 00007f94273b6300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by rcu_tasks_kthre/12: #0: ffffffff8d326f50 (rcu_tasks.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by rcu_tasks_trace/13: #0: ffffffff8d327750 (rcu_tasks_trace.tasks_gp_mutex){+.+.}-{3:3}, at: rcu_tasks_one_gp+0x30/0xd00 kernel/rcu/tasks.h:507 1 lock held by khungtaskd/28: #0: ffffffff8d326d80 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 1 lock held by udevd/4432: #0: ffff888146ce54c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfe/0xa60 block/bdev.c:813 2 locks held by getty/4744: #0: ffff88814a48c098 (&tty->ldisc_sem){++++}-{0:0}, at: tty_ldisc_ref_wait+0x21/0x70 drivers/tty/tty_ldisc.c:244 #1: ffffc900015b02f0 (&ldata->atomic_read_lock){+.+.}-{3:3}, at: n_tty_read+0x53b/0x1650 drivers/tty/n_tty.c:2177 3 locks held by kworker/u4:6/5191: #0: ffff88814528c938 ((wq_completion)writeback){+.+.}-{0:0}, at: process_one_work+0x7f2/0xdb0 #1: ffffc90004cdfd00 ((work_completion)(&(&wb->dwork)->work)){+.+.}-{0:0}, at: process_one_work+0x831/0xdb0 kernel/workqueue.c:2264 #2: ffff88814009a0e0 (&type->s_umount_key#40){.+.+}-{3:3}, at: trylock_super+0x1b/0xf0 fs/super.c:415 3 locks held by syz-executor.0/17039: #0: ffff88803c67e460 (sb_writers#4){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:508 #1: ffff8880331f0400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: inode_lock_nested include/linux/fs.h:791 [inline] #1: ffff8880331f0400 (&type->i_mutex_dir_key#3/1){+.+.}-{3:3}, at: filename_create+0x22a/0x4f0 fs/namei.c:3807 #2: ffff8880331f00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_lock_xattr fs/ext4/xattr.h:155 [inline] #2: ffff8880331f00c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_add_inline_entry+0xe1/0x990 fs/ext4/inline.c:1289 1 lock held by syz-executor.1/17030: #0: ffff888146ce54c8 (&disk->open_mutex){+.+.}-{3:3}, at: sync_bdevs+0x1b0/0x320 block/bdev.c:1052 2 locks held by syz-executor.5/17178: #0: ffff88803c67e0e0 (&type->s_umount_key#31){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 #1: ffff888146d2e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff888146d2e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x264/0xaa0 fs/fs-writeback.c:2723 1 lock held by syz-executor.0/17202: #0: ffff888146ce54c8 (&disk->open_mutex){+.+.}-{3:3}, at: blkdev_get_by_dev+0xfe/0xa60 block/bdev.c:813 2 locks held by syz-executor.1/17229: #0: ffff88803c67e0e0 (&type->s_umount_key#31){++++}-{3:3}, at: iterate_supers+0xb0/0x1f0 fs/super.c:722 #1: ffff888146d2e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: bdi_down_write_wb_switch_rwsem fs/fs-writeback.c:364 [inline] #1: ffff888146d2e7d0 (&bdi->wb_switch_rwsem){+.+.}-{3:3}, at: sync_inodes_sb+0x264/0xaa0 fs/fs-writeback.c:2723 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106 nmi_cpu_backtrace+0x46f/0x4f0 lib/nmi_backtrace.c:111 nmi_trigger_cpumask_backtrace+0x1ba/0x420 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:148 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:220 [inline] watchdog+0xcd5/0xd20 kernel/hung_task.c:377 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 13578 Comm: kworker/u4:5 Not tainted 6.2.0-rc2-syzkaller-00313-g9b43a525db12 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 Workqueue: phy14 ieee80211_iface_work RIP: 0010:unwind_next_frame+0x17ee/0x24c0 arch/x86/kernel/unwind_orc.c:617 Code: 00 41 c6 06 01 4c 8b 74 24 20 4c 8b 7c 24 10 48 8b 6c 24 50 48 8b 5c 24 48 42 8a 44 0d 00 84 c0 0f 85 f9 06 00 00 42 8a 04 0b <84> c0 0f 85 17 07 00 00 41 0f b7 75 00 c1 ee 04 83 e6 0f 83 fe 04 RSP: 0018:ffffc9000381f120 EFLAGS: 00000246 RAX: ffffc9000381f200 RBX: 1ffffffff1e5394b RCX: 0000000000000000 RDX: 0000000000000010 RSI: 0000000000000000 RDI: ffffc9000381f260 RBP: 1ffffffff1e5394b R08: dffffc0000000000 R09: dffffc0000000000 R10: fffff52000703e4c R11: 1ffff92000703e4a R12: ffffc9000381f200 R13: ffffffff8f29ca58 R14: ffffc9000381f250 R15: ffffffff8f29ca54 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000c0007c3000 CR3: 000000000d08e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: arch_stack_walk+0xb2/0xe0 arch/x86/kernel/stacktrace.c:25 stack_trace_save+0x104/0x1e0 kernel/stacktrace.c:122 kasan_save_stack mm/kasan/common.c:45 [inline] kasan_set_track+0x3d/0x60 mm/kasan/common.c:52 kasan_save_free_info+0x27/0x40 mm/kasan/generic.c:518 ____kasan_slab_free+0xd6/0x120 mm/kasan/common.c:236 kasan_slab_free include/linux/kasan.h:177 [inline] slab_free_hook mm/slub.c:1781 [inline] slab_free_freelist_hook+0x12e/0x1a0 mm/slub.c:1807 slab_free mm/slub.c:3787 [inline] __kmem_cache_free+0x71/0x110 mm/slub.c:3800 ieee80211_bss_info_update+0x9d6/0x1020 net/mac80211/scan.c:223 ieee80211_rx_bss_info net/mac80211/ibss.c:1120 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1609 [inline] ieee80211_ibss_rx_queued_mgmt+0x1945/0x2c40 net/mac80211/ibss.c:1638 ieee80211_iface_process_skb net/mac80211/iface.c:1581 [inline] ieee80211_iface_work+0x773/0xcf0 net/mac80211/iface.c:1635 process_one_work+0x877/0xdb0 kernel/workqueue.c:2289 worker_thread+0xb14/0x1330 kernel/workqueue.c:2436 kthread+0x266/0x300 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308