INFO: task syz-executor.1:11272 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28104 pid:11272 ppid: 8443 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_read_slowpath+0x4df/0x920 kernel/locking/rwsem.c:992 __down_read_common+0x65/0x390 kernel/locking/rwsem.c:1213 inode_lock_shared include/linux/fs.h:783 [inline] lookup_slow fs/namei.c:1560 [inline] walk_component+0x448/0x6b0 fs/namei.c:1861 lookup_last fs/namei.c:2312 [inline] path_lookupat+0x19d/0x970 fs/namei.c:2336 filename_lookup+0x1b0/0x5e0 fs/namei.c:2369 unix_find_other+0x80/0x7c0 net/unix/af_unix.c:935 unix_dgram_sendmsg+0xd3d/0x2990 net/unix/af_unix.c:1695 sock_sendmsg_nosec net/socket.c:652 [inline] sock_sendmsg net/socket.c:672 [inline] ____sys_sendmsg+0x519/0x800 net/socket.c:2345 ___sys_sendmsg net/socket.c:2399 [inline] __sys_sendmmsg+0x453/0x680 net/socket.c:2489 __do_sys_sendmmsg net/socket.c:2518 [inline] __se_sys_sendmmsg net/socket.c:2515 [inline] __x64_sys_sendmmsg+0x9c/0xb0 net/socket.c:2515 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46 entry_SYSCALL_64_after_hwframe+0x44/0xa9 RIP: 0033:0x45e219 RSP: 002b:00007fb6fb7a0c68 EFLAGS: 00000246 ORIG_RAX: 0000000000000133 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 000000000045e219 RDX: 0000000000000002 RSI: 0000000020008600 RDI: 0000000000000005 RBP: 000000000119c070 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c034 R13: 00007ffdad867d8f R14: 00007fb6fb7a19c0 R15: 000000000119c034 INFO: task syz-executor.1:11276 blocked for more than 143 seconds. Not tainted 5.11.0-rc5-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.1 state:D stack:28256 pid:11276 ppid: 8443 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: 0033:0x45e219 RSP: 002b:00007fb6fb77fc68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 000000000045e219 RDX: 0000000020002100 RSI: 00000000200020c0 RDI: 0000000000000000 RBP: 000000000119c120 R08: 0000000020002140 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000119c0dc R13: 00007ffdad867d8f R14: 00007fb6fb7809c0 R15: 000000000119c0dc Showing all locks held in the system: 1 lock held by khungtaskd/1631: #0: ffffffff8bd11700 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 arch/x86/pci/mmconfig_64.c:151 1 lock held by systemd-journal/4880: 1 lock held by in:imklog/8135: #0: ffff8880212b25f0 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0x24e/0x2f0 fs/file.c:947 3 locks held by syz-executor.1/11261: 1 lock held by syz-executor.1/11272: #0: ffff888079b48810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock_shared include/linux/fs.h:783 [inline] #0: ffff888079b48810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lookup_slow fs/namei.c:1560 [inline] #0: ffff888079b48810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: walk_component+0x448/0x6b0 fs/namei.c:1861 1 lock held by syz-executor.1/11276: #0: ffff888079b48810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:773 [inline] #0: ffff888079b48810 (&type->i_mutex_dir_key#8){++++}-{3:3}, at: lock_mount+0x6a/0x2f0 fs/namespace.c:2198 ============================================= NMI backtrace for cpu 0 CPU: 0 PID: 1631 Comm: khungtaskd Not tainted 5.11.0-rc5-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 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 90 Comm: kworker/u4:2 Not tainted 5.11.0-rc5-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy6 ieee80211_iface_work RIP: 0010:cfg80211_get_bss_channel+0x4bc/0x670 net/wireless/scan.c:1817 Code: 00 00 00 e8 26 1b b1 f8 4c 8b 64 24 08 49 83 c4 02 48 8b 5c 24 18 4c 89 e0 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 8a 04 08 <84> c0 0f 85 00 01 00 00 41 0f b6 3c 24 8b 74 24 14 e8 4e 4d fc ff RSP: 0018:ffffc900010ef468 EFLAGS: 00000a02 RAX: 1ffff1100544a100 RBX: ffff8880795a8580 RCX: dffffc0000000000 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff88802a250c87 R08: ffffffff88c6af8f R09: fffffbfff1a27256 R10: fffffbfff1a27256 R11: 0000000000000000 R12: ffff88802a250c88 R13: 0000000000000028 R14: 0000000000000000 R15: ffff8880795ab350 FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f6e8aba5b80 CR3: 00000000119a6000 CR4: 00000000001506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: cfg80211_inform_single_bss_frame_data net/wireless/scan.c:2349 [inline] cfg80211_inform_bss_frame_data+0x260/0x1cd0 net/wireless/scan.c:2433 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