------------[ cut here ]------------ kernel BUG at ./include/linux/skbuff.h:1406! invalid opcode: 0000 [#1] PREEMPT SMP KASAN Modules linked in: CPU: 1 PID: 10451 Comm: syz-executor.3 Not tainted 4.14.140 #36 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88807710a5c0 task.stack: ffff88809fd70000 RIP: 0010:skb_queue_prev include/linux/skbuff.h:1406 [inline] RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1650 [inline] RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1647 [inline] RIP: 0010:tcp_rtx_queue_tail include/net/tcp.h:1705 [inline] RIP: 0010:tcp_fragment+0x12a7/0x13e0 net/ipv4/tcp_output.c:1284 RSP: 0018:ffff8880aef07c00 EFLAGS: 00010206 RAX: ffff88807710a5c0 RBX: ffff888099a87000 RCX: 1ffff1100f5782e9 RDX: 0000000000000100 RSI: ffff888099a87000 RDI: ffff888099a87008 RBP: ffff8880aef07c58 R08: 0000000001080020 R09: ffff888099a87028 R10: ffff88821fff8050 R11: 0000000000000001 R12: 0000000000000000 R13: 0000000000006880 R14: ffff88807abc1750 R15: 0000000001080020 FS: 00007f0c4ad84700(0000) GS:ffff8880aef00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f0c4ad41db8 CR3: 00000000a5b50000 CR4: 00000000001406e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: tcp_write_wakeup+0x34c/0x5b0 net/ipv4/tcp_output.c:3708 tcp_send_probe0+0x4b/0x3fe net/ipv4/tcp_output.c:3736 tcp_probe_timer net/ipv4/tcp_timer.c:365 [inline] tcp_write_timer_handler+0x6da/0x7e0 net/ipv4/tcp_timer.c:583 tcp_write_timer+0xd8/0x180 net/ipv4/tcp_timer.c:597 call_timer_fn+0x161/0x670 kernel/time/timer.c:1279 expire_timers kernel/time/timer.c:1318 [inline] __run_timers kernel/time/timer.c:1634 [inline] __run_timers kernel/time/timer.c:1602 [inline] run_timer_softirq+0x5b4/0x1570 kernel/time/timer.c:1647 __do_softirq+0x244/0x9a0 kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x160/0x1b0 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x146/0x5e0 arch/x86/kernel/apic/apic.c:1064 apic_timer_interrupt+0x96/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:memcmp+0x48/0xc0 lib/string.c:861 RSP: 0018:ffff88809fd775c8 EFLAGS: 00000206 ORIG_RAX: ffffffffffffff10 RAX: 0000000000000000 RBX: ffff88809fd776e6 RCX: 0000000000000005 RDX: 0000000000000006 RSI: ffff88807d40d8ee RDI: ffff88809fd77670 RBP: ffff88809fd775f0 R08: 000000008b01fd9a R09: 0000000000000001 R10: 0000000000000000 R11: ffff88807710a5c0 R12: dffffc0000000000 R13: ffff88809fd776f0 R14: 0000000000000010 R15: ffff88807d40d860 find_stack lib/stackdepot.c:176 [inline] depot_save_stack+0x11c/0x410 lib/stackdepot.c:225 save_stack+0xa9/0xd0 mm/kasan/kasan.c:453 set_track mm/kasan/kasan.c:459 [inline] kasan_kmalloc mm/kasan/kasan.c:551 [inline] kasan_kmalloc+0xce/0xf0 mm/kasan/kasan.c:529 kasan_slab_alloc+0xf/0x20 mm/kasan/kasan.c:489 slab_post_alloc_hook mm/slab.h:442 [inline] slab_alloc mm/slab.c:3390 [inline] kmem_cache_alloc_trace+0x13b/0x790 mm/slab.c:3616 kmalloc include/linux/slab.h:488 [inline] kzalloc include/linux/slab.h:661 [inline] vga_arb_open+0x46/0x270 drivers/gpu/vga/vgaarb.c:1284 ------------[ cut here ]------------ misc_open+0x34f/0x480 drivers/char/misc.c:154 kernel BUG at ./include/linux/skbuff.h:1406! chrdev_open+0x207/0x590 fs/char_dev.c:423 do_dentry_open+0x73b/0xeb0 fs/open.c:777 vfs_open+0x105/0x220 fs/open.c:891 do_last fs/namei.c:3425 [inline] path_openat+0x8bd/0x3f70 fs/namei.c:3566 do_filp_open+0x18e/0x250 fs/namei.c:3600 do_sys_open+0x2c5/0x430 fs/open.c:1084 SYSC_openat fs/open.c:1111 [inline] SyS_openat+0x30/0x40 fs/open.c:1105 do_syscall_64+0x1e8/0x640 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459879 RSP: 002b:00007f0c4ad83c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0000000000000004 RCX: 0000000000459879 RDX: 0000000000000100 RSI: 00000000200000c0 RDI: ffffffffffffff9c RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f0c4ad846d4 R13: 00000000004c6614 R14: 00000000004db5f0 R15: 00000000ffffffff Code: 3c 02 00 0f 85 4f 01 00 00 48 8b 45 d0 ba 00 00 00 00 4c 8b b0 58 02 00 00 4c 3b 75 c0 4c 0f 44 f2 e9 e6 fc ff ff e8 09 73 35 fc <0f> 0b e8 d2 23 5f fc e9 31 fa ff ff 48 89 df e8 25 23 5f fc e9 RIP: skb_queue_prev include/linux/skbuff.h:1406 [inline] RSP: ffff8880aef07c00 RIP: tcp_write_queue_prev include/net/tcp.h:1650 [inline] RSP: ffff8880aef07c00 RIP: tcp_write_queue_prev include/net/tcp.h:1647 [inline] RSP: ffff8880aef07c00 RIP: tcp_rtx_queue_tail include/net/tcp.h:1705 [inline] RSP: ffff8880aef07c00 RIP: tcp_fragment+0x12a7/0x13e0 net/ipv4/tcp_output.c:1284 RSP: ffff8880aef07c00 invalid opcode: 0000 [#2] PREEMPT SMP KASAN ---[ end trace d73a4661168d2ae7 ]--- Modules linked in: CPU: 0 PID: 10436 Comm: syz-executor.0 Tainted: G D 4.14.140 #36 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 task: ffff88808a03c440 task.stack: ffff8880a5768000 RIP: 0010:skb_queue_prev include/linux/skbuff.h:1406 [inline] RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1650 [inline] RIP: 0010:tcp_write_queue_prev include/net/tcp.h:1647 [inline] RIP: 0010:tcp_rtx_queue_tail include/net/tcp.h:1705 [inline] RIP: 0010:tcp_fragment+0x12a7/0x13e0 net/ipv4/tcp_output.c:1284 RSP: 0018:ffff8880aee07c00 EFLAGS: 00010206 RAX: ffff88808a03c440 RBX: ffff8880a0ab8a80 RCX: 1ffff1100f578049 RDX: 0000000000000100 RSI: ffff8880a0ab8a80 RDI: ffff8880a0ab8a88 RBP: ffff8880aee07c58 R08: 0000000001080020 R09: ffff8880a0ab8aa8 R10: ffff88821fff8010 R11: 0000000000000001 R12: 0000000000000000