INFO: task syz-executor.3:21996 blocked for more than 143 seconds. Tainted: G W 5.13.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:29136 pid:21996 ppid: 17873 flags:0x00000004 Call Trace: context_switch kernel/sched/core.c:4683 [inline] __schedule+0x934/0x2710 kernel/sched/core.c:5940 schedule+0xd3/0x270 kernel/sched/core.c:6019 rwsem_down_write_slowpath+0x7c2/0x11d0 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+0x137/0x150 kernel/locking/rwsem.c:1407 inode_lock include/linux/fs.h:774 [inline] process_measurement+0x6fa/0x17e0 security/integrity/ima/ima_main.c:234 ima_file_check+0xb9/0x100 security/integrity/ima/ima_main.c:499 do_open fs/namei.c:3363 [inline] path_openat+0x15b5/0x27e0 fs/namei.c:3494 do_filp_open+0x190/0x3d0 fs/namei.c:3521 do_sys_openat2+0x16d/0x420 fs/open.c:1195 do_sys_open fs/open.c:1211 [inline] __do_sys_openat fs/open.c:1227 [inline] __se_sys_openat fs/open.c:1222 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1222 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665d9 RSP: 002b:00007f4455472188 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 000000000056c318 RCX: 00000000004665d9 RDX: 0000000000007a05 RSI: 0000000020000080 RDI: ffffffffffffff9c RBP: 00000000004bfcb9 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000001700 R11: 0000000000000246 R12: 000000000056c318 R13: 00007ffdc78413df R14: 00007f4455472300 R15: 0000000000022000 INFO: lockdep is turned off. NMI backtrace for cpu 0 CPU: 0 PID: 1651 Comm: khungtaskd Tainted: G W 5.13.0-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_lvl+0xcd/0x134 lib/dump_stack.c:96 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+0xd4b/0xfb0 kernel/hung_task.c:294 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 0 to CPUs 1: NMI backtrace for cpu 1 CPU: 1 PID: 20809 Comm: kworker/u4:53 Tainted: G W 5.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy54 ieee80211_iface_work RIP: 0010:cmp_bss net/wireless/scan.c:1279 [inline] RIP: 0010:rb_find_bss+0x153/0x200 net/wireless/scan.c:1506 Code: dd e8 b1 f4 1c f9 48 85 db 74 50 e8 a7 f4 1c f9 41 80 3f 00 75 7c 48 8d 73 48 4d 8b 6e 68 48 89 f0 48 c1 e8 03 42 80 3c 20 00 <75> 54 48 8b 6b 48 49 39 ed 0f 85 14 ff ff ff 48 89 34 24 e8 75 f4 RSP: 0018:ffffc90002a6eef0 EFLAGS: 00000246 RAX: 1ffff11005193a8d RBX: ffff888028c9d420 RCX: 0000000000000000 RDX: ffff88806c031c40 RSI: ffff888028c9d468 RDI: ffff8880a3b201a0 RBP: 000000010003ae72 R08: 0000000000000001 R09: 0000000000000003 R10: fffff5200054ddda R11: 0000000000000050 R12: dffffc0000000000 R13: ffff8880a3b23490 R14: ffffc90002a6f070 R15: fffff5200054de1b FS: 0000000000000000(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f631fe73000 CR3: 00000000137ad000 CR4: 0000000000350ee0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: cfg80211_bss_update+0xc6/0x1e00 net/wireless/scan.c:1705 cfg80211_inform_single_bss_frame_data+0x6e8/0xee0 net/wireless/scan.c:2414 cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2447 ieee80211_bss_info_update+0x3ce/0xb60 net/mac80211/scan.c:190 ieee80211_rx_bss_info net/mac80211/ibss.c:1126 [inline] ieee80211_rx_mgmt_probe_beacon+0xcfe/0x17b0 net/mac80211/ibss.c:1615 ieee80211_ibss_rx_queued_mgmt+0xd82/0x15f0 net/mac80211/ibss.c:1642 ieee80211_iface_process_skb net/mac80211/iface.c:1426 [inline] ieee80211_iface_work+0x7f7/0xa40 net/mac80211/iface.c:1462 process_one_work+0x98d/0x1630 kernel/workqueue.c:2276 worker_thread+0x658/0x11f0 kernel/workqueue.c:2422 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295