INFO: task syz-executor.0:22783 blocked for more than 143 seconds. Not tainted 5.15.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.0 state:D stack:24752 pid:22783 ppid: 6471 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0xb72/0x1460 kernel/sched/core.c:6287 schedule+0x14b/0x210 kernel/sched/core.c:6366 schedule_timeout+0xac/0x300 kernel/time/timer.c:1857 do_wait_for_common+0x2da/0x480 kernel/sched/completion.c:85 __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion_timeout+0x46/0x60 kernel/sched/completion.c:157 usb_start_wait_urb+0x160/0x530 drivers/usb/core/message.c:63 do_proc_bulk+0x970/0x1060 drivers/usb/core/devio.c:1236 proc_bulk drivers/usb/core/devio.c:1273 [inline] usbdev_do_ioctl drivers/usb/core/devio.c:2547 [inline] usbdev_ioctl+0x36b9/0x6d00 drivers/usb/core/devio.c:2713 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:874 [inline] __se_sys_ioctl+0xfb/0x170 fs/ioctl.c:860 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x44/0xd0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f52319c6ae9 RSP: 002b:00007f522ef3c188 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f5231ad9f60 RCX: 00007f52319c6ae9 RDX: 00000000200001c0 RSI: 00000000c0185502 RDI: 0000000000000005 RBP: 00007f5231a20f25 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffdee7cec2f R14: 00007f522ef3c300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8c91c980 (rcu_read_lock){....}-{1:2}, at: rcu_lock_acquire+0x0/0x30 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0x1dc/0x2d8 lib/dump_stack.c:106 nmi_cpu_backtrace+0x45f/0x490 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x16a/0x280 lib/nmi_backtrace.c:62 trigger_all_cpu_backtrace include/linux/nmi.h:146 [inline] check_hung_uninterruptible_tasks kernel/hung_task.c:210 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:295 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 10115 Comm: kworker/u4:8 Not tainted 5.15.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy5 ieee80211_iface_work RIP: 0010:_ieee802_11_parse_elems_crc+0x57c/0x3040 net/mac80211/util.c:1011 Code: ca b9 ef f7 4c 39 f3 0f 8c b3 29 00 00 4c 89 f8 48 c1 e8 03 48 b9 00 00 00 00 00 fc ff df 0f b6 04 08 84 c0 0f 85 4d 24 00 00 <49> 8d 47 02 48 89 04 24 41 0f b6 1f 48 8b 75 10 48 85 f6 74 1f 4c RSP: 0018:ffffc90004bbebc0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 000000000000000f RCX: dffffc0000000000 RDX: ffff888084980000 RSI: 0000000000000006 RDI: 000000000000000f RBP: ffffc90004bbef28 R08: ffffffff8993fe46 R09: fffff52000977dd3 R10: fffff52000977dd3 R11: 0000000000000000 R12: 0000000000000004 R13: 0000000000000002 R14: 0000000000000006 R15: ffff88807dc9848d FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f31505ac028 CR3: 000000000c68e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee802_11_parse_elems_crc+0xc24/0x1020 net/mac80211/util.c:1490 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2207 [inline] ieee80211_bss_info_update+0x81a/0xbc0 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon net/mac80211/ibss.c:1608 [inline] ieee80211_ibss_rx_queued_mgmt+0x1704/0x2b40 net/mac80211/ibss.c:1635 ieee80211_iface_process_skb net/mac80211/iface.c:1439 [inline] ieee80211_iface_work+0x749/0xce0 net/mac80211/iface.c:1493 process_one_work+0x853/0x1140 kernel/workqueue.c:2297 worker_thread+0xac1/0x1320 kernel/workqueue.c:2444 kthread+0x453/0x480 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 ---------------- Code disassembly (best guess): 0: ca b9 ef lret $0xefb9 3: f7 4c 39 f3 0f 8c b3 testl $0x29b38c0f,-0xd(%rcx,%rdi,1) a: 29 b: 00 00 add %al,(%rax) d: 4c 89 f8 mov %r15,%rax 10: 48 c1 e8 03 shr $0x3,%rax 14: 48 b9 00 00 00 00 00 movabs $0xdffffc0000000000,%rcx 1b: fc ff df 1e: 0f b6 04 08 movzbl (%rax,%rcx,1),%eax 22: 84 c0 test %al,%al 24: 0f 85 4d 24 00 00 jne 0x2477 * 2a: 49 8d 47 02 lea 0x2(%r15),%rax <-- trapping instruction 2e: 48 89 04 24 mov %rax,(%rsp) 32: 41 0f b6 1f movzbl (%r15),%ebx 36: 48 8b 75 10 mov 0x10(%rbp),%rsi 3a: 48 85 f6 test %rsi,%rsi 3d: 74 1f je 0x5e 3f: 4c rex.WR