------------[ cut here ]------------ syscall 56 left IRQs disabled WARNING: CPU: 1 PID: 31467 at kernel/entry/common.c:245 syscall_exit_to_user_mode_prepare kernel/entry/common.c:245 [inline] WARNING: CPU: 1 PID: 31467 at kernel/entry/common.c:245 syscall_exit_to_user_mode+0xc1/0x2e0 kernel/entry/common.c:263 Kernel panic - not syncing: panic_on_warn set ... CPU: 1 PID: 31467 Comm: syz-executor465 Not tainted 5.9.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 Call Trace: __dump_stack lib/dump_stack.c:77 [inline] dump_stack+0x198/0x1fd lib/dump_stack.c:118 panic+0x347/0x7c0 kernel/panic.c:231 __warn.cold+0x20/0x46 kernel/panic.c:600 report_bug+0x1bd/0x210 lib/bug.c:198 handle_bug+0x38/0x90 arch/x86/kernel/traps.c:234 exc_invalid_op+0x14/0x40 arch/x86/kernel/traps.c:254 asm_exc_invalid_op+0x12/0x20 arch/x86/include/asm/idtentry.h:536 RIP: 0010:syscall_exit_to_user_mode_prepare kernel/entry/common.c:245 [inline] RIP: 0010:syscall_exit_to_user_mode+0xc1/0x2e0 kernel/entry/common.c:263 Code: 58 00 48 8b 7c 24 20 5b 5d 41 5c 41 5d e9 97 f7 ff ff e8 72 88 85 f9 eb c6 0f 0b 48 63 f6 48 c7 c7 50 a9 6a 89 e8 61 c8 50 f9 <0f> 0b e8 b8 8e 85 f9 48 83 3d 28 b6 c1 01 00 0f 84 7d 01 00 00 fb RSP: 0018:ffffc90003f27f30 EFLAGS: 00010082 RAX: 0000000000000000 RBX: 0000000000004000 RCX: 0000000000000000 RDX: ffff8880a2ec6480 RSI: ffffffff815db9a7 RDI: fffff520007e4fd8 RBP: ffffc90003f27f58 R08: 0000000000000000 R09: ffffffff89bcb4a3 R10: 00000000000007db R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 ret_from_fork+0x15/0x30 arch/x86/entry/entry_64.S:287 RIP: 0033:0x44da49 Code: ff 48 85 f6 0f 84 a7 dc fb ff 48 83 ee 10 48 89 4e 08 48 89 3e 48 89 d7 4c 89 c2 4d 89 c8 4c 8b 54 24 08 b8 38 00 00 00 0f 05 <48> 85 c0 0f 8c 7e dc fb ff 74 01 c3 31 ed 48 f7 c7 00 00 01 00 75 RSP: 002b:00007f7349191db0 EFLAGS: 00000202 ORIG_RAX: 0000000000000038 RAX: 0000000000000000 RBX: 00007f7349192700 RCX: 000000000044da49 RDX: 00007f73491929d0 RSI: 00007f7349191db0 RDI: 00000000003d0f00 RBP: 00007ffe9e518280 R08: 00007f7349192700 R09: 00007f7349192700 R10: 00007f73491929d0 R11: 0000000000000202 R12: 0000000000000000 R13: 00007ffe9e5181df R14: 00007f73491929c0 R15: 20c49ba5e353f7cf Kernel Offset: disabled