INFO: task syz-executor.4:19395 blocked for more than 143 seconds. Not tainted 5.15.0-rc1-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.4 state:D stack:26176 pid:19395 ppid: 6979 flags:0x00004004 Call Trace: context_switch kernel/sched/core.c:4940 [inline] __schedule+0x940/0x26f0 kernel/sched/core.c:6287 schedule+0xd3/0x270 kernel/sched/core.c:6366 schedule_timeout+0x1db/0x2a0 kernel/time/timer.c:1857 do_wait_for_common kernel/sched/completion.c:85 [inline] __wait_for_common kernel/sched/completion.c:106 [inline] wait_for_common kernel/sched/completion.c:117 [inline] wait_for_completion+0x176/0x280 kernel/sched/completion.c:138 io_wq_exit_workers fs/io-wq.c:1181 [inline] io_wq_put_and_exit+0x4b2/0xd20 fs/io-wq.c:1216 io_uring_clean_tctx fs/io_uring.c:9614 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9694 io_uring_files_cancel include/linux/io_uring.h:16 [inline] do_exit+0x265/0x2a30 kernel/exit.c:780 do_group_exit+0x125/0x310 kernel/exit.c:922 get_signal+0x47f/0x2160 kernel/signal.c:2868 arch_do_signal_or_restart+0x2a9/0x1c40 arch/x86/kernel/signal.c:865 handle_signal_work kernel/entry/common.c:148 [inline] exit_to_user_mode_loop kernel/entry/common.c:172 [inline] exit_to_user_mode_prepare+0x17d/0x290 kernel/entry/common.c:209 __syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline] syscall_exit_to_user_mode+0x19/0x60 kernel/entry/common.c:302 do_syscall_64+0x42/0xb0 arch/x86/entry/common.c:86 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x4665f9 RSP: 002b:00007f28ff992188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000080 RBX: 000000000056bf80 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 0000000000002a6e RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 000000000000000e R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf80 R13: 0000000000a9fb1f R14: 00007f28ff992300 R15: 0000000000022000 Showing all locks held in the system: 3 locks held by kworker/u4:1/10: 1 lock held by khungtaskd/27: #0: ffffffff8b97fe20 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 1 lock held by in:imklog/6266: #0: ffff88801b3f8d70 (&f->f_pos_lock){+.+.}-{3:3}, at: __fdget_pos+0xe9/0x100 fs/file.c:990 3 locks held by kworker/u4:10/25694: #0: ffff8880b9c31a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock_nested kernel/sched/core.c:474 [inline] #0: ffff8880b9c31a58 (&rq->__lock){-.-.}-{2:2}, at: raw_spin_rq_lock kernel/sched/sched.h:1317 [inline] #0: ffff8880b9c31a58 (&rq->__lock){-.-.}-{2:2}, at: rq_lock kernel/sched/sched.h:1620 [inline] #0: ffff8880b9c31a58 (&rq->__lock){-.-.}-{2:2}, at: __schedule+0x236/0x26f0 kernel/sched/core.c:6201 #1: ffff8880b9c1f9c8 (&per_cpu_ptr(group->pcpu, cpu)->seq){-.-.}-{0:0}, at: psi_task_switch+0x39d/0x480 kernel/sched/psi.c:880 #2: ffff88802227cd80 (&wdev->mtx){+.+.}-{3:3}, at: sdata_lock net/mac80211/ieee80211_i.h:1014 [inline] #2: ffff88802227cd80 (&wdev->mtx){+.+.}-{3:3}, at: ieee80211_ibss_work+0x93/0xe80 net/mac80211/ibss.c:1676 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.15.0-rc1-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+0xcd/0x134 lib/dump_stack.c:106 nmi_cpu_backtrace.cold+0x47/0x144 lib/nmi_backtrace.c:105 nmi_trigger_cpumask_backtrace+0x1ae/0x220 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+0xc1d/0xf50 kernel/hung_task.c:295 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 25694 Comm: kworker/u4:10 Not tainted 5.15.0-rc1-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy3 ieee80211_iface_work RIP: 0010:__sanitizer_cov_trace_const_cmp1+0x18/0x80 kernel/kcov.c:271 Code: 4c 38 f0 4e 89 54 c8 20 48 89 10 c3 66 0f 1f 44 00 00 53 41 89 fb 41 89 f1 bf 03 00 00 00 65 48 8b 0c 25 40 f0 01 00 48 89 ce <4c> 8b 54 24 08 e8 4e f1 ff ff 84 c0 74 51 48 8b 81 20 15 00 00 44 RSP: 0018:ffffc900049c6ec0 EFLAGS: 00000246 RAX: 0000000000000000 RBX: 0000000000000032 RCX: ffff88808e383900 RDX: fffff52000938def RSI: ffff88808e383900 RDI: 0000000000000003 RBP: 0000000000000004 R08: 0000000000000000 R09: 0000000000000000 R10: fffff52000938dee R11: 0000000000000000 R12: 0000000000000032 R13: dffffc0000000000 R14: ffff88803e62c88e R15: ffff88803e62c88d FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f9be081b000 CR3: 000000000b68e000 CR4: 00000000001506f0 Call Trace: _ieee802_11_parse_elems_crc+0x227/0x20f0 net/mac80211/util.c:1063 ieee802_11_parse_elems_crc+0x89e/0xfe0 net/mac80211/util.c:1490 ieee802_11_parse_elems net/mac80211/ieee80211_i.h:2207 [inline] ieee80211_bss_info_update+0x468/0xb60 net/mac80211/scan.c:212 ieee80211_rx_bss_info net/mac80211/ibss.c:1119 [inline] ieee80211_rx_mgmt_probe_beacon+0xcce/0x17c0 net/mac80211/ibss.c:1608 ieee80211_ibss_rx_queued_mgmt+0xd37/0x1610 net/mac80211/ibss.c:1635 ieee80211_iface_process_skb net/mac80211/iface.c:1439 [inline] ieee80211_iface_work+0xa65/0xd00 net/mac80211/iface.c:1493 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444 kthread+0x3e5/0x4d0 kernel/kthread.c:319 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295 ---------------- Code disassembly (best guess): 0: 4c 38 f0 rex.WR cmp %r14b,%al 3: 4e 89 54 c8 20 mov %r10,0x20(%rax,%r9,8) 8: 48 89 10 mov %rdx,(%rax) b: c3 retq c: 66 0f 1f 44 00 00 nopw 0x0(%rax,%rax,1) 12: 53 push %rbx 13: 41 89 fb mov %edi,%r11d 16: 41 89 f1 mov %esi,%r9d 19: bf 03 00 00 00 mov $0x3,%edi 1e: 65 48 8b 0c 25 40 f0 mov %gs:0x1f040,%rcx 25: 01 00 27: 48 89 ce mov %rcx,%rsi * 2a: 4c 8b 54 24 08 mov 0x8(%rsp),%r10 <-- trapping instruction 2f: e8 4e f1 ff ff callq 0xfffff182 34: 84 c0 test %al,%al 36: 74 51 je 0x89 38: 48 8b 81 20 15 00 00 mov 0x1520(%rcx),%rax 3f: 44 rex.R