Hello, syzbot found the following issue on: HEAD commit: 85a90500f9a1 Merge tag 'io_uring-5.14-2021-08-07' of git:/.. git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=13c8aa81300000 kernel config: https://syzkaller.appspot.com/x/.config?x=5ba4a97de189f896 dashboard link: https://syzkaller.appspot.com/bug?extid=23843634c323e144fd0b compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.1 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12ac8392300000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1039bce6300000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+23843634c323e144fd0b@xxxxxxxxxxxxxxxxxxxxxxxxx ------------[ cut here ]------------ WARNING: CPU: 0 PID: 8449 at kernel/events/core.c:6407 perf_sigtrap kernel/events/core.c:6407 [inline] WARNING: CPU: 0 PID: 8449 at kernel/events/core.c:6407 perf_pending_event_disable kernel/events/core.c:6431 [inline] WARNING: CPU: 0 PID: 8449 at kernel/events/core.c:6407 perf_pending_event+0x4ba/0x560 kernel/events/core.c:6474 Modules linked in: CPU: 0 PID: 8449 Comm: syz-executor996 Not tainted 5.14.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:perf_sigtrap kernel/events/core.c:6407 [inline] RIP: 0010:perf_pending_event_disable kernel/events/core.c:6431 [inline] RIP: 0010:perf_pending_event+0x4ba/0x560 kernel/events/core.c:6474 Code: ff 4c 89 e7 e8 d7 78 27 00 e9 2f ff ff ff e8 ad 78 27 00 e9 3d fc ff ff 4c 89 ff e8 30 79 27 00 e9 fb fb ff ff e8 b6 ba e1 ff <0f> 0b e9 86 fd ff ff e8 ba 78 27 00 e9 7b fe ff ff 48 89 df e8 9d RSP: 0018:ffffc90000007f38 EFLAGS: 00010046 RAX: 0000000080010001 RBX: ffff88802a04fc40 RCX: 0000000000000000 RDX: ffff8880377e0040 RSI: ffffffff8193268a RDI: ffff888026467958 RBP: 0000000000000002 R08: 0000000000000000 R09: 0000000000000020 R10: ffffffff819322cb R11: 0000000000000000 R12: ffff8880377e0040 R13: ffff888026467800 R14: ffff88802a04f800 R15: ffff88802a04fc30 FS: 0000000000545300(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00000000004d05c0 CR3: 000000003d54f000 CR4: 00000000001506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> irq_work_single+0x120/0x1f0 kernel/irq_work.c:155 irq_work_run_list+0x91/0xc0 kernel/irq_work.c:177 irq_work_run+0x54/0xd0 kernel/irq_work.c:186 __sysvec_irq_work+0x95/0x3d0 arch/x86/kernel/irq_work.c:22 sysvec_irq_work+0x8e/0xc0 arch/x86/kernel/irq_work.c:17 </IRQ> asm_sysvec_irq_work+0x12/0x20 arch/x86/include/asm/idtentry.h:664 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:169 [inline] RIP: 0010:_raw_spin_unlock_irq+0x25/0x40 kernel/locking/spinlock.c:199 Code: 0f 1f 44 00 00 55 48 8b 74 24 08 48 89 fd 48 83 c7 18 e8 3e 1a 2d f8 48 89 ef e8 e6 8f 2d f8 e8 21 cb 4d f8 fb bf 01 00 00 00 <e8> 36 6a 21 f8 65 8b 05 cf b0 d4 76 85 c0 74 02 5d c3 e8 2b 06 d3 RSP: 0018:ffffc90001a17ee8 EFLAGS: 00000202 RAX: 0000000000000315 RBX: 0000000000000000 RCX: 1ffffffff1ad8461 RDX: 0000000000000000 RSI: 0000000000000001 RDI: 0000000000000001 RBP: ffff888021b9cb40 R08: 0000000000000001 R09: 0000000000000001 R10: ffffffff817b0a38 R11: 0000000000000000 R12: ffff888033f2f320 R13: 0000000000000000 R14: ffff888021b9cb40 R15: ffff8880377e0040 spin_unlock_irq include/linux/spinlock.h:404 [inline] do_group_exit+0x29a/0x310 kernel/exit.c:919 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 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: 0033:0x444379 Code: 00 49 c7 c0 b8 ff ff ff be e7 00 00 00 ba 3c 00 00 00 eb 12 0f 1f 44 00 00 89 d0 0f 05 48 3d 00 f0 ff ff 77 1c f4 89 f0 0f 05 <48> 3d 00 f0 ff ff 76 e7 f7 d8 64 41 89 00 eb df 0f 1f 80 00 00 00 RSP: 002b:00007fffad23f4c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7 RAX: ffffffffffffffda RBX: 00000000004ca370 RCX: 0000000000444379 RDX: 000000000000003c RSI: 00000000000000e7 RDI: 0000000000000000 RBP: 0000000000000000 R08: ffffffffffffffb8 R09: 0000000000f0b5ff R10: 00007fffad23f550 R11: 0000000000000246 R12: 00000000004ca370 R13: 0000000000000001 R14: 0000000000000000 R15: 0000000000000001 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches
