INFO: task syz-executor.2:11544 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.2 state:D stack:27736 pid:11544 ppid: 6562 flags:0x00024004 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:1162 [inline] io_wq_put_and_exit+0x40c/0xc70 fs/io-wq.c:1197 io_uring_clean_tctx fs/io_uring.c:9609 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9689 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:00007fde5b822188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000800 RBX: 000000000056c0f0 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000393c RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c0f0 R13: 00007ffc403d069f R14: 00007fde5b822300 R15: 0000000000022000 INFO: task syz-executor.3:11520 blocked for more than 143 seconds. Not tainted 5.14.0-syzkaller #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor.3 state:D stack:28744 pid:11520 ppid: 6564 flags:0x00024004 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:1162 [inline] io_wq_put_and_exit+0x40c/0xc70 fs/io-wq.c:1197 io_uring_clean_tctx fs/io_uring.c:9609 [inline] io_uring_cancel_generic+0x5fe/0x740 fs/io_uring.c:9689 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:00007fac530e9188 EFLAGS: 00000246 ORIG_RAX: 00000000000001aa RAX: 0000000000000800 RBX: 000000000056c038 RCX: 00000000004665f9 RDX: 0000000000000000 RSI: 000000000000393c RDI: 0000000000000004 RBP: 00000000004bfcc4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056c038 R13: 00007fff56a494ef R14: 00007fac530e9300 R15: 0000000000022000 Showing all locks held in the system: 1 lock held by khungtaskd/27: #0: ffffffff8b97fda0 (rcu_read_lock){....}-{1:2}, at: debug_show_all_locks+0x53/0x260 kernel/locking/lockdep.c:6446 ============================================= NMI backtrace for cpu 1 CPU: 1 PID: 27 Comm: khungtaskd Not tainted 5.14.0-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+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: 6501 Comm: kworker/u4:6 Not tainted 5.14.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: phy3 ieee80211_iface_work RIP: 0010:add_ptr_to_bulk_krc_lock kernel/rcu/tree.c:3469 [inline] RIP: 0010:kvfree_call_rcu+0x188/0x990 kernel/rcu/tree.c:3553 Code: f9 01 0f 87 9c 06 00 00 48 ba 00 00 00 00 00 fc ff df 48 89 c1 48 c1 e9 03 80 3c 11 00 0f 85 1e 06 00 00 48 81 38 fe 01 00 00 <0f> 84 ee 00 00 00 49 83 f9 01 0f 87 28 06 00 00 4b 8d 7c ce 08 48 RSP: 0018:ffffc90002e8ed18 EFLAGS: 00000097 RAX: ffff888018cfa000 RBX: 0000000000000008 RCX: 1ffff1100319f400 RDX: dffffc0000000000 RSI: ffff888023578000 RDI: ffff8880b9c1ff08 RBP: ffff88801ed45600 R08: 00001ffffffffffe R09: 0000000000000000 R10: ffffffff81b15218 R11: 0000000000086089 R12: ffff88801ed45608 R13: ffff8880b9c20018 R14: ffff8880b9c1ff00 R15: 0000000000000286 FS: 0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fa34fc2c010 CR3: 000000000b68e000 CR4: 0000000000350ef0 Call Trace: cfg80211_update_known_bss+0x833/0xa60 net/wireless/scan.c:1660 cfg80211_bss_update+0xef/0x2070 net/wireless/scan.c:1707 cfg80211_inform_single_bss_frame_data+0x6e8/0xee0 net/wireless/scan.c:2411 cfg80211_inform_bss_frame_data+0xa7/0xb10 net/wireless/scan.c:2444 ieee80211_bss_info_update+0x376/0xb60 net/mac80211/scan.c:190 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), 2 bytes skipped: 0: 0f 87 9c 06 00 00 ja 0x6a2 6: 48 ba 00 00 00 00 00 movabs $0xdffffc0000000000,%rdx d: fc ff df 10: 48 89 c1 mov %rax,%rcx 13: 48 c1 e9 03 shr $0x3,%rcx 17: 80 3c 11 00 cmpb $0x0,(%rcx,%rdx,1) 1b: 0f 85 1e 06 00 00 jne 0x63f 21: 48 81 38 fe 01 00 00 cmpq $0x1fe,(%rax) * 28: 0f 84 ee 00 00 00 je 0x11c <-- trapping instruction 2e: 49 83 f9 01 cmp $0x1,%r9 32: 0f 87 28 06 00 00 ja 0x660 38: 4b 8d 7c ce 08 lea 0x8(%r14,%r9,8),%rdi 3d: 48 rex.W