RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 2 UID: 0 PID: 15412 Comm: syz.2.1785 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 Call Trace: __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x100/0x190 lib/dump_stack.c:120 vpanic+0x553/0x970 kernel/panic.c:651 panic+0xd1/0xe0 kernel/panic.c:788 check_panic_on_warn kernel/panic.c:525 [inline] check_panic_on_warn.cold+0x19/0x34 kernel/panic.c:520 __warn.cold+0x191/0x318 kernel/panic.c:1104 __report_bug+0x30f/0x440 lib/bug.c:254 report_bug_entry+0xe2/0x290 lib/bug.c:274 handle_bug+0x1cd/0x2a0 arch/x86/kernel/traps.c:431 exc_invalid_op+0x17/0x50 arch/x86/kernel/traps.c:490 asm_exc_invalid_op+0x1a/0x20 arch/x86/include/asm/idtentry.h:593 RIP: 0010:set_field_width lib/vsprintf.c:2654 [inline] RIP: 0010:set_field_width lib/vsprintf.c:2651 [inline] RIP: 0010:vsnprintf+0x106e/0x1300 lib/vsprintf.c:2918 Code: 74 08 48 89 df e8 22 06 b2 f6 44 89 74 24 4c 44 0f b6 2b 49 89 de e9 f6 f3 ff ff e8 cc c5 3f f6 48 8d 3d 25 3d 8c 05 44 89 ee <67> 48 0f b9 3a 48 b8 00 00 00 00 00 fc ff df 48 89 da 48 c1 ea 03 RSP: 0018:ffffc900064a71a0 EFLAGS: 00010087 RAX: 0000000000001984 RBX: ffffffff8ceb46a2 RCX: ffffc90029302000 RDX: 0000000000080000 RSI: 000000002074736f RDI: ffffffff9157d930 RBP: ffffc900064a7290 R08: 0000000000000004 R09: 000000002074736f R10: 00000000007fffff R11: 0000000000000001 R12: 0000000000000002 R13: 000000002074736f R14: 0000000000000030 R15: 00000000007fffff va_format+0x14e/0x4b0 lib/vsprintf.c:1725 pointer+0x929/0xe50 lib/vsprintf.c:2577 vsnprintf+0x649/0x1300 lib/vsprintf.c:2953 vprintk_store+0x3b3/0xbe0 kernel/printk/printk.c:2307 vprintk_emit+0x139/0x6b0 kernel/printk/printk.c:2455 dev_vprintk_emit+0x391/0x3e0 drivers/base/core.c:5000 dev_printk_emit+0xd2/0x10d drivers/base/core.c:5011 __dynamic_dev_dbg+0x252/0x310 lib/dynamic_debug.c:904 dtv_property_process_get.isra.0+0xf40/0x3690 drivers/media/dvb-core/dvb_frontend.c:1595 dvb_frontend_handle_compat_ioctl+0x59e/0x710 drivers/media/dvb-core/dvb_frontend.c:2218 dvb_frontend_compat_ioctl+0xf6/0x180 drivers/media/dvb-core/dvb_frontend.c:2249 __do_compat_sys_ioctl fs/ioctl.c:695 [inline] __se_compat_sys_ioctl fs/ioctl.c:638 [inline] __ia32_compat_sys_ioctl+0x2cf/0x360 fs/ioctl.c:638 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:79 [inline] __do_fast_syscall_32+0x13a/0x8b0 arch/x86/entry/syscall_32.c:291 do_fast_syscall_32+0x32/0x70 arch/x86/entry/syscall_32.c:316 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf7f87fec Code: Unable to access opcode bytes at 0xf7f87fc2. RSP: 002b:00000000f542550c EFLAGS: 00000292 ORIG_RAX: 0000000000000036 RAX: ffffffffffffffda RBX: 0000000000000009 RCX: 0000000080086f53 RDX: 0000000080000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000292 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Kernel Offset: disabled Rebooting in 86400 seconds.. ---------------- Code disassembly (best guess): 0: 74 08 je 0xa 2: 48 89 df mov %rbx,%rdi 5: e8 22 06 b2 f6 call 0xf6b2062c a: 44 89 74 24 4c mov %r14d,0x4c(%rsp) f: 44 0f b6 2b movzbl (%rbx),%r13d 13: 49 89 de mov %rbx,%r14 16: e9 f6 f3 ff ff jmp 0xfffff411 1b: e8 cc c5 3f f6 call 0xf63fc5ec 20: 48 8d 3d 25 3d 8c 05 lea 0x58c3d25(%rip),%rdi # 0x58c3d4c 27: 44 89 ee mov %r13d,%esi * 2a: 67 48 0f b9 3a ud1 (%edx),%rdi <-- trapping instruction 2f: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 36: fc ff df 39: 48 89 da mov %rbx,%rdx 3c: 48 c1 ea 03 shr $0x3,%rdx