INFO: task syz-executor.1:9934 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:29096 pid: 9934 ppid: 8461 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] open_last_lookups fs/namei.c:3177 [inline] path_openat+0x7bb/0x37a0 fs/namei.c:3368 do_filp_open+0x191/0x3a0 fs/namei.c:3398 do_sys_openat2+0xba/0x380 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+0xd3/0x100 fs/open.c:1256 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f601a146188 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 000000000056c008 RCX: 0000000000465b09 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000040 RBP: 00000000004b069f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c008 R13: 00007ffe8cb8501f R14: 00007f601a146300 R15: 0000000000022000 INFO: task syz-executor.1:9938 blocked for more than 143 seconds. Not tainted 5.11.0-rc6-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28096 pid: 9938 ppid: 8461 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4327 [inline] __schedule+0x999/0xe70 kernel/sched/core.c:5078 schedule+0x14b/0x200 kernel/sched/core.c:5157 rwsem_down_write_slowpath+0xd69/0x1370 kernel/locking/rwsem.c:1106 __down_write_common kernel/locking/rwsem.c:1261 [inline] __down_write kernel/locking/rwsem.c:1270 [inline] down_write+0x112/0x120 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:773 [inline] lock_mount+0x6a/0x2f0 fs/namespace.c:2198 do_new_mount_fc fs/namespace.c:2824 [inline] do_new_mount fs/namespace.c:2883 [inline] path_mount+0x20d1/0x2a00 fs/namespace.c:3211 do_mount fs/namespace.c:3224 [inline] __do_sys_mount fs/namespace.c:3432 [inline] __se_sys_mount+0x28c/0x320 fs/namespace.c:3409 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x465b09 RSP: 002b:00007f601a125188 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 000000000056c0b0 RCX: 0000000000465b09 RDX: 0000000020002000 RSI: 00000000200042c0 RDI: 0000000000000000 RBP: 00000000004b069f R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0b0 R13: 00007ffe8cb8501f R14: 00007f601a125300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/1646: #0: ffffffff8c711780 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by in:imklog/8144: #0: ffff888022569c70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 3 locks held by syz-executor.1/9930: 2 locks held by syz-executor.1/9934: #0: ffff888013e94460 (sb_writers#15){.+.+}-{0:0}, at: mnt_want_write+0x3b/0x80 fs/namespace.c:354 #1: ffff888076600150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #1: ffff888076600150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: open_last_lookups fs/namei.c:3177 [inline] #1: ffff888076600150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: path_openat+0x7bb/0x37a0 fs/namei.c:3368 1 lock held by syz-executor.1/9938: #0: ffff888076600150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff888076600150 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2198 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 1646 Comm: khungtaskd Not tainted 5.11.0-rc6-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+0x137/0x1be lib/dump_stack.c:120 nmi_cpu_backtrace+0x16c/0x190 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x191/0x2f0 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+0xce9/0xd30 kernel/hung_task.c:294 kthread+0x39a/0x3c0 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: 8414 Comm: kworker/u4:6 Not tainted 5.11.0-rc6-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy10 ieee80211_iface_work RIP: 0010:cfg80211_inform_bss_frame_data+0x9ef/0x1cd0 net/wireless/scan.c:2435 Code: 8f ff ff 4d 85 ed 74 3e 48 8b 44 24 38 48 8d 98 b8 06 00 00 48 89 d8 48 c1 e8 03 42 8a 04 30 84 c0 0f 85 2a 12 00 00 0f b6 2b <89> eb 83 e3 01 31 ff 89 de e8 83 ee b0 f8 84 db 75 17 e8 aa eb b0 RSP: 0018:ffffc9000184f4e8 EFLAGS: 00000246 RAX: 1ffff1100ef52100 RBX: ffff888077a90c38 RCX: ffff88801d8ab780 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000001 R08: ffffffff88c671fa R09: fffffbfff1b67346 R10: fffffbfff1b67346 R11: 0000000000000000 R12: 0000000000000000 R13: ffff88801d6e9c68 R14: dffffc0000000000 R15: ffff88801d6e9c00 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f7f8421c020 CR3: 000000001d61e000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_bss_info_update+0x6d7/0xb40 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1615 [inline] ieee80211_ibss_rx_queued_mgmt+0x721/0x2930 net/mac80211/ibss.c:1642 ieee80211_iface_work+0x71a/0xb10 net/mac80211/iface.c:1423 process_one_work+0x789/0xfc0 kernel/workqueue.c:2275 worker_thread+0xac1/0x1300 kernel/workqueue.c:2421 kthread+0x39a/0x3c0 kernel/kthread.c:292 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296