Hello, syzbot found the following issue on: HEAD commit: cffb2b72d3ed Merge tag 'kgdb-5.18-rc1' of git://git.kernel.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=11ae58bb700000 kernel config: https://syzkaller.appspot.com/x/.config?x=69c8957f4ac2dea6 dashboard link: https://syzkaller.appspot.com/bug?extid=d761775dff24be3ad4be compiler: Debian clang version 11.0.1-2, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=103e2107700000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=149c7ec7700000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+d761775dff24be3ad4be@xxxxxxxxxxxxxxxxxxxxxxxxx INFO: task krfcommd:2706 blocked for more than 143 seconds. Tainted: G W 5.17.0-syzkaller-12817-gcffb2b72d3ed #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:krfcommd state:D stack:28984 pid: 2706 ppid: 2 flags:0x00004000 Call Trace: <TASK> context_switch kernel/sched/core.c:5073 [inline] __schedule+0x937/0x1090 kernel/sched/core.c:6382 schedule+0xeb/0x1b0 kernel/sched/core.c:6454 schedule_preempt_disabled+0xf/0x20 kernel/sched/core.c:6513 __mutex_lock_common+0xd1f/0x2590 kernel/locking/mutex.c:673 __mutex_lock kernel/locking/mutex.c:733 [inline] mutex_lock_nested+0x1a/0x20 kernel/locking/mutex.c:785 rfcomm_process_sessions+0x21/0x3f0 net/bluetooth/rfcomm/core.c:2015 rfcomm_run+0x195/0x2c0 net/bluetooth/rfcomm/core.c:2122 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 </TASK> INFO: task syz-executor296:3618 blocked for more than 143 seconds. Tainted: G W 5.17.0-syzkaller-12817-gcffb2b72d3ed #0 "echo 0 > /proc/sys/kernel/hung_task_timeout_secs" disables this message. task:syz-executor296 state:D stack:26552 pid: 3618 ppid: 3612 flags:0x00004006 Call Trace: <TASK> context_switch kernel/sched/core.c:5073 [inline] __schedule+0x937/0x1090 kernel/sched/core.c:6382 schedule+0xeb/0x1b0 kernel/sched/core.c:6454 __lock_sock+0x1cf/0x330 net/core/sock.c:2770 lock_sock_nested+0x9f/0x100 net/core/sock.c:3317 lock_sock include/net/sock.h:1682 [inline] rfcomm_sk_state_change+0x63/0x300 net/bluetooth/rfcomm/sock.c:73 __rfcomm_dlc_close+0x2cc/0x480 net/bluetooth/rfcomm/core.c:489 rfcomm_dlc_close+0x10d/0x1c0 net/bluetooth/rfcomm/core.c:520 __rfcomm_sock_close+0x101/0x220 net/bluetooth/rfcomm/sock.c:220 rfcomm_sock_shutdown+0xa5/0x220 net/bluetooth/rfcomm/sock.c:905 rfcomm_sock_release+0x55/0x120 net/bluetooth/rfcomm/sock.c:925 __sock_release net/socket.c:650 [inline] sock_close+0xd8/0x260 net/socket.c:1318 __fput+0x3f6/0x860 fs/file_table.c:317 task_work_run+0x146/0x1c0 kernel/task_work.c:164 exit_task_work include/linux/task_work.h:32 [inline] do_exit+0x5e3/0x20f0 kernel/exit.c:794 do_group_exit+0x2af/0x2b0 kernel/exit.c:924 get_signal+0x23e8/0x23f0 kernel/signal.c:2903 arch_do_signal_or_restart+0xa1/0x740 arch/x86/kernel/signal.c:868 handle_signal_work kernel/entry/common.c:149 [inline] exit_to_user_mode_loop kernel/entry/common.c:187 [inline] exit_to_user_mode_prepare+0x165/0x200 kernel/entry/common.c:222 __syscall_exit_to_user_mode_work kernel/entry/common.c:304 [inline] syscall_exit_to_user_mode+0x2e/0x70 kernel/entry/common.c:315 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f4e731503f9 RSP: 002b:00007fff14a0e988 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: fffffffffffffffc RBX: 0000555556a333b8 RCX: 00007f4e731503f9 RDX: 0000000000000080 RSI: 0000000020000000 RDI: 0000000000000004 RBP: 0000000000000003 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000004 R13: 0000000000000072 R14: 00007fff14a0ea10 R15: 0000000000000000 </TASK> INFO: lockdep is turned off. NMI backtrace for cpu 1 CPU: 1 PID: 28 Comm: khungtaskd Tainted: G W 5.17.0-syzkaller-12817-gcffb2b72d3ed #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: <TASK> __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:111 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:212 [inline] watchdog+0xc82/0xcd0 kernel/hung_task.c:369 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 </TASK> Sending NMI from CPU 1 to CPUs 0: NMI backtrace for cpu 0 CPU: 0 PID: 8 Comm: kworker/u4:0 Tainted: G W 5.17.0-syzkaller-12817-gcffb2b72d3ed #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Workqueue: events_unbound toggle_allocation_gate RIP: 0010:bcmp+0x1/0x170 lib/string.c:801 Code: 7e fd eb c5 44 89 f9 80 e1 07 38 c1 7c ce 4c 89 ff e8 33 7c 7e fd eb c4 31 ed 89 e8 5b 41 5c 41 5d 41 5e 41 5f 5d c3 66 90 55 <41> 57 41 56 41 55 41 54 53 49 89 d6 49 89 f7 48 89 fb 49 bd 00 00 RSP: 0018:ffffc900000d7930 EFLAGS: 00000297 RAX: 1ffffffff15103dd RBX: ffffffff81d6d87e RCX: dffffc0000000000 RDX: 0000000000000005 RSI: ffffffff8f7f6000 RDI: ffffffff81d6d87e RBP: ffffc900000d7a80 R08: ffffffff81d6d87e R09: ffffffff845cf58d R10: 0000000000000003 R11: ffff88813fe6d700 R12: ffffffff8a881e6a R13: ffffffff8f7f6000 R14: ffffffff8f7f6000 R15: 0000000000000000 FS: 0000000000000000(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055e1e7f11600 CR3: 000000000ca8e000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> __jump_label_patch+0x24d/0x410 arch/x86/kernel/jump_label.c:65 arch_jump_label_transform_queue+0x49/0xd0 arch/x86/kernel/jump_label.c:137 __jump_label_update+0x15d/0x350 kernel/jump_label.c:451 static_key_disable_cpuslocked+0xcc/0x1b0 kernel/jump_label.c:207 static_key_disable+0x16/0x20 kernel/jump_label.c:215 toggle_allocation_gate+0x3c8/0x460 mm/kfence/core.c:793 process_one_work+0x83c/0x11a0 kernel/workqueue.c:2289 worker_thread+0xa6c/0x1290 kernel/workqueue.c:2436 kthread+0x2a3/0x2d0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 </TASK> ---------------- Code disassembly (best guess): 0: 7e fd jle 0xffffffff 2: eb c5 jmp 0xffffffc9 4: 44 89 f9 mov %r15d,%ecx 7: 80 e1 07 and $0x7,%cl a: 38 c1 cmp %al,%cl c: 7c ce jl 0xffffffdc e: 4c 89 ff mov %r15,%rdi 11: e8 33 7c 7e fd callq 0xfd7e7c49 16: eb c4 jmp 0xffffffdc 18: 31 ed xor %ebp,%ebp 1a: 89 e8 mov %ebp,%eax 1c: 5b pop %rbx 1d: 41 5c pop %r12 1f: 41 5d pop %r13 21: 41 5e pop %r14 23: 41 5f pop %r15 25: 5d pop %rbp 26: c3 retq 27: 66 90 xchg %ax,%ax 29: 55 push %rbp * 2a: 41 57 push %r15 <-- trapping instruction 2c: 41 56 push %r14 2e: 41 55 push %r13 30: 41 54 push %r12 32: 53 push %rbx 33: 49 89 d6 mov %rdx,%r14 36: 49 89 f7 mov %rsi,%r15 39: 48 89 fb mov %rdi,%rbx 3c: 49 rex.WB 3d: bd .byte 0xbd --- This report is generated by a bot. 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