INFO: task syz-executor.0:11450 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.0 state:D stack:29120 pid:11450 ppid: 8494 flags:0x00000004 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] open_last_lookups fs/namei.c:3177 [inline] path_openat+0x907/0x2730 fs/namei.c:3368 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_creat fs/open.c:1262 [inline] __se_sys_creat fs/open.c:1256 [inline] __x64_sys_creat+0xc9/0x120 fs/open.c:1256 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007fe125a7ac68 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 0000000000000002 RCX: 000000000045e219 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020002040 RBP: 000000000119c060 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffd87b72edf R14: 00007fe125a7b9c0 R15: 000000000119c034 Showing all locks held in the system: 1 lock held by khungtaskd/1627: #0: ffffffff8b373920 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6254 1 lock held by in:imklog/8165: #0: ffff8880267d34f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:947 4 locks held by syz-executor.0/11438: 2 locks held by syz-executor.0/11450: #0: ffff8880169a8460 (sb_writers#15){.+.+}-{0:0}, at: open_last_lookups fs/namei.c:3167 [inline] #0: ffff8880169a8460 (sb_writers#15){.+.+}-{0:0}, at: path_openat+0x2462/0x2730 fs/namei.c:3368 #1: ffff888079c38810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff888079c38810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3177 [inline] #1: ffff888079c38810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x907/0x2730 fs/namei.c:3368 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1627 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 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10829 Comm: kworker/u4:7 Not tainted 5.11.0-rc3-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy14 ieee80211_iface_work RIP: 0010:cfg80211_inform_single_bss_frame_data+0x2/0xe90 net/wireless/scan.c:2302 Code: 28 00 00 00 75 12 48 83 c4 78 4c 89 e0 5b 5d 41 5c 41 5d 41 5e 41 5f c3 e8 bb 65 c3 00 90 66 2e 0f 1f 84 00 00 00 00 00 41 57 <41> 56 41 55 49 89 fd 41 54 49 89 cc 55 48 89 d5 53 48 89 f3 48 81 RSP: 0018:ffffc9000241f1d0 EFLAGS: 00000293 RAX: 0000000000000000 RBX: 000000000000004c RCX: 000000000000004c RDX: ffff88802341b850 RSI: ffffc9000241f588 RDI: ffff8880787a0580 RBP: ffffc9000241f588 R08: 0000000000000a20 R09: 0000000000000000 R10: 0000000000000001 R11: 0000000000000000 R12: 0000000000000a20 R13: dffffc0000000000 R14: ffff88802341b850 R15: ffff8880787a0580 FS: 0000000000000000(0000) GS:ffff8880b9e00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f2337e04030 CR3: 000000002f07b000 CR4: 0000000000350ef0 Call Trace: cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2433 ieee80211_bss_info_update+0x3ce/0xb20 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline] ieee80211_rx_mgmt_probe_beacon+0xccd/0x16b0 net/mac80211/ibss.c:1615 ieee80211_ibss_rx_queued_mgmt+0xe3e/0x1870 net/mac80211/ibss.c:1642 ieee80211_iface_work+0x761/0x9e0 net/mac80211/iface.c:1423 process_one_work+0x98d/0x15f0 kernel/workqueue.c:2275 worker_thread+0x64c/0x1120 kernel/workqueue.c:2421 kthread+0x3b1/0x4a0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296