------------[ cut here ]------------ WARNING: CPU: 0 PID: 30242 at net/ipv4/tcp_timer.c:429 tcp_retransmit_timer+0x1a66/0x2590 net/ipv4/tcp_timer.c:429 Kernel panic - not syncing: panic_on_warn set ... CPU: 0 PID: 30242 Comm: syz-executor.0 Not tainted 4.14.145+ #0 Call Trace: __dump_stack lib/dump_stack.c:17 [inline] dump_stack+0xca/0x134 lib/dump_stack.c:53 panic+0x1ea/0x3d3 kernel/panic.c:182 __warn.cold+0x2f/0x3a kernel/panic.c:546 report_bug+0x20a/0x248 lib/bug.c:186 fixup_bug arch/x86/kernel/traps.c:177 [inline] fixup_bug arch/x86/kernel/traps.c:172 [inline] do_error_trap+0x1bf/0x2d0 arch/x86/kernel/traps.c:295 invalid_op+0x18/0x40 arch/x86/entry/entry_64.S:963 RIP: 0010:tcp_retransmit_timer+0x1a66/0x2590 net/ipv4/tcp_timer.c:429 RSP: 0018:ffff8881db807c78 EFLAGS: 00010206 RAX: ffff8881d55caf00 RBX: ffff8881a0a6bb00 RCX: 0000000000000001 RDX: 0000000000000100 RSI: 0000000000000000 RDI: ffff8881d129ddc8 RBP: ffff8881d129d400 R08: ffff88821ffff01c R09: ffff88821ffff008 R10: ffff88821ffff017 R11: ffff88821ffff010 R12: ffff8881d129da9a R13: ffff8881d129d430 R14: 0000000000000000 R15: ffff8881d129dc0c tcp_write_timer_handler+0x43d/0x780 net/ipv4/tcp_timer.c:579 tcp_write_timer+0xc9/0x170 net/ipv4/tcp_timer.c:597 call_timer_fn+0x15b/0x6a0 kernel/time/timer.c:1279 expire_timers+0x227/0x4c0 kernel/time/timer.c:1318 __run_timers kernel/time/timer.c:1634 [inline] run_timer_softirq+0x1eb/0x5d0 kernel/time/timer.c:1647 __do_softirq+0x234/0x9ec kernel/softirq.c:288 invoke_softirq kernel/softirq.c:368 [inline] irq_exit+0x114/0x150 kernel/softirq.c:409 exiting_irq arch/x86/include/asm/apic.h:648 [inline] smp_apic_timer_interrupt+0x1a7/0x650 arch/x86/kernel/apic/apic.c:1102 apic_timer_interrupt+0x8c/0xa0 arch/x86/entry/entry_64.S:792 RIP: 0010:preempt_count_add+0xec/0x180 kernel/sched/core.c:3173 RSP: 0018:ffff8881ca2d7208 EFLAGS: 00000246 ORIG_RAX: ffffffffffffff10 RAX: dffffc0000000000 RBX: ffffffffaceae266 RCX: 0000000000000000 RDX: 1ffff1103aab9805 RSI: 0000000000000000 RDI: ffff8881d55cc028 RBP: ffff8881ca2d7218 R08: 0000000000000001 R09: ffff8881ca2d7610 R10: ffff8881ca2d732d R11: 000000000001c033 R12: ffff8881d55caf00 R13: ffff8881ca2d7330 R14: ffff8881d55caf00 R15: 0000000000000001 unwind_next_frame+0xf6/0x1810 arch/x86/kernel/unwind_orc.c:336 __save_stack_trace+0x7a/0xf0 arch/x86/kernel/stacktrace.c:44 save_stack mm/kasan/common.c:76 [inline] set_track mm/kasan/common.c:85 [inline] __kasan_kmalloc.part.0+0x53/0xc0 mm/kasan/common.c:495 slab_post_alloc_hook mm/slab.h:439 [inline] slab_alloc_node mm/slub.c:2792 [inline] slab_alloc mm/slub.c:2800 [inline] kmem_cache_alloc+0xee/0x360 mm/slub.c:2805 kmem_cache_zalloc include/linux/slab.h:651 [inline] alloc_buffer_head+0x20/0xd0 fs/buffer.c:3425 alloc_page_buffers+0xd6/0x240 fs/buffer.c:874 create_empty_buffers+0x36/0x490 fs/buffer.c:1579 create_page_buffers+0x14d/0x1c0 fs/buffer.c:1696 __block_write_begin_int+0x17d/0x1070 fs/buffer.c:2006 ext4_da_write_begin+0x49b/0x10c0 fs/ext4/inode.c:3106 generic_perform_write+0x1d2/0x460 mm/filemap.c:3132 __generic_file_write_iter+0x32e/0x550 mm/filemap.c:3257 ext4_file_write_iter+0x58f/0xdb0 fs/ext4/file.c:268 call_write_iter include/linux/fs.h:1788 [inline] new_sync_write fs/read_write.c:471 [inline] __vfs_write+0x401/0x5a0 fs/read_write.c:484 vfs_write+0x17f/0x4d0 fs/read_write.c:546 SYSC_write fs/read_write.c:594 [inline] SyS_write+0x102/0x250 fs/read_write.c:586 do_syscall_64+0x19b/0x520 arch/x86/entry/common.c:292 entry_SYSCALL_64_after_hwframe+0x42/0xb7 RIP: 0033:0x459a09 RSP: 002b:00007f88a7983c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459a09 RDX: 000000000d4b9afd RSI: 00000000200009c0 RDI: 0000000000000003 RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007f88a79846d4 R13: 00000000004c9bc1 R14: 00000000004e1420 R15: 00000000ffffffff Kernel Offset: 0x2be00000 from 0xffffffff81000000 (relocation range: 0xffffffff80000000-0xffffffffbfffffff) Rebooting in 86400 seconds..