------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:2926! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 15756 Comm: syz-executor.3 Not tainted 5.19.0-rc6-syzkaller-00111-gb047602d579b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/29/2022 RIP: 0010:__skb_checksum+0x84b/0x850 net/core/skbuff.c:2926 Code: f7 e8 b9 55 ae f9 e9 4a f9 ff ff 89 d9 80 e1 07 38 c1 0f 8c 58 f9 ff ff 48 89 df e8 7f 55 ae f9 e9 4b f9 ff ff e8 95 9c 5b f9 <0f> 0b 0f 1f 00 55 41 56 53 41 89 d6 89 f5 48 89 fb e8 7f 9c 5b f9 RSP: 0018:ffffc900000072b8 EFLAGS: 00010246 RAX: ffffffff882bf9eb RBX: 00000000000001f4 RCX: ffff88801b0a3b00 RDX: 0000000080000101 RSI: 00000000000001f4 RDI: 0000000000000000 RBP: 00000000000002c0 R08: ffffffff882bf940 R09: fffff52000000e72 R10: fffff52000000e72 R11: 1ffff92000000e70 R12: ffff8880773fbac8 R13: 000000000000003c R14: ffff888032ba7d4c R15: 00000000380b5cdf FS: 00007f272630f700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8cf016d058 CR3: 0000000030f01000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_checksum+0x9a/0xe0 net/core/skbuff.c:2940 skb_checksum_help+0x23e/0x590 net/core/dev.c:3276 ip_do_fragment+0x215/0x2140 net/ipv4/ip_output.c:774 dst_output include/net/dst.h:451 [inline] ip_local_out net/ipv4/ip_output.c:126 [inline] __ip_queue_xmit+0x11b2/0x1bf0 net/ipv4/ip_output.c:532 __tcp_transmit_skb+0x1e6e/0x3410 net/ipv4/tcp_output.c:1405 tcp_transmit_skb net/ipv4/tcp_output.c:1423 [inline] __tcp_retransmit_skb+0x905/0x1170 net/ipv4/tcp_output.c:3232 tcp_retransmit_skb+0x2e/0x390 net/ipv4/tcp_output.c:3255 tcp_retransmit_timer+0x1600/0x27f0 net/ipv4/tcp_timer.c:539 tcp_write_timer_handler+0x236/0xa90 net/ipv4/tcp_timer.c:622 tcp_write_timer+0x176/0x280 net/ipv4/tcp_timer.c:642 call_timer_fn+0xf5/0x210 kernel/time/timer.c:1474 expire_timers kernel/time/timer.c:1519 [inline] __run_timers+0x76a/0x980 kernel/time/timer.c:1790 run_timer_softirq+0x63/0xf0 kernel/time/timer.c:1803 __do_softirq+0x382/0x793 kernel/softirq.c:571 __irq_exit_rcu+0xec/0x170 kernel/softirq.c:650 irq_exit_rcu+0x5/0x20 kernel/softirq.c:662 sysvec_apic_timer_interrupt+0x91/0xb0 arch/x86/kernel/apic/apic.c:1106 asm_sysvec_apic_timer_interrupt+0x16/0x20 RIP: 0010:__find_get_block+0x2e2/0x11c0 fs/buffer.c:1305 Code: 0f 1f 84 00 00 00 00 00 e8 0b 71 8e ff 49 83 c7 08 49 ff cc e9 df fe ff ff e8 fa 70 8e ff 45 31 ed e8 d2 1d 95 ff fb 4d 85 ed <0f> 84 96 00 00 00 e8 e3 70 8e ff 4c 89 ef e8 3b d5 ff ff 49 8d 5d RSP: 0018:ffffc900031af3c0 EFLAGS: 00000246 RAX: 4058fa68527cd000 RBX: 0000000000000a8b RCX: ffffffff816836e8 RDX: dffffc0000000000 RSI: ffffffff8a8d2bc0 RDI: ffffffff8ae9a280 RBP: ffffc900031af520 R08: dffffc0000000000 R09: fffffbfff1fa9814 R10: fffffbfff1fa9814 R11: 1ffffffff1fa9813 R12: fffffffffffffff1 R13: 0000000000000000 R14: 0000000000000a9b R15: 0000000000035d30 __getblk_slow fs/buffer.c:1034 [inline] __getblk_gfp+0x11e/0x290 fs/buffer.c:1333 __getblk include/linux/buffer_head.h:381 [inline] reiserfs_breada fs/reiserfs/journal.c:2338 [inline] journal_read+0x88c/0x3b30 fs/reiserfs/journal.c:2448 journal_init+0x1a89/0x2510 fs/reiserfs/journal.c:2896 reiserfs_fill_super+0x1038/0x2620 fs/reiserfs/super.c:2024 mount_bdev+0x26c/0x3a0 fs/super.c:1367 legacy_get_tree+0xea/0x180 fs/fs_context.c:610 vfs_get_tree+0x88/0x270 fs/super.c:1497 do_new_mount+0x289/0xad0 fs/namespace.c:3040 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount+0x2e3/0x3d0 fs/namespace.c:3568 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x2b/0x70 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f272528a63a Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 b8 04 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f272630ef88 EFLAGS: 00000206 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000020000200 RCX: 00007f272528a63a RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007f272630efe0 RBP: 00007f272630f020 R08: 00007f272630f020 R09: 0000000020000000 R10: 0000000000000000 R11: 0000000000000206 R12: 0000000020000000 R13: 0000000020000100 R14: 00007f272630efe0 R15: 0000000020011500 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__skb_checksum+0x84b/0x850 net/core/skbuff.c:2926 Code: f7 e8 b9 55 ae f9 e9 4a f9 ff ff 89 d9 80 e1 07 38 c1 0f 8c 58 f9 ff ff 48 89 df e8 7f 55 ae f9 e9 4b f9 ff ff e8 95 9c 5b f9 <0f> 0b 0f 1f 00 55 41 56 53 41 89 d6 89 f5 48 89 fb e8 7f 9c 5b f9 RSP: 0018:ffffc900000072b8 EFLAGS: 00010246 RAX: ffffffff882bf9eb RBX: 00000000000001f4 RCX: ffff88801b0a3b00 RDX: 0000000080000101 RSI: 00000000000001f4 RDI: 0000000000000000 RBP: 00000000000002c0 R08: ffffffff882bf940 R09: fffff52000000e72 R10: fffff52000000e72 R11: 1ffff92000000e70 R12: ffff8880773fbac8 R13: 000000000000003c R14: ffff888032ba7d4c R15: 00000000380b5cdf FS: 00007f272630f700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f8cf016d058 CR3: 0000000030f01000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 1f 84 00 00 00 00 nopl 0x0(%rax,%rax,1) 7: 00 8: e8 0b 71 8e ff callq 0xff8e7118 d: 49 83 c7 08 add $0x8,%r15 11: 49 ff cc dec %r12 14: e9 df fe ff ff jmpq 0xfffffef8 19: e8 fa 70 8e ff callq 0xff8e7118 1e: 45 31 ed xor %r13d,%r13d 21: e8 d2 1d 95 ff callq 0xff951df8 26: fb sti 27: 4d 85 ed test %r13,%r13 * 2a: 0f 84 96 00 00 00 je 0xc6 <-- trapping instruction 30: e8 e3 70 8e ff callq 0xff8e7118 35: 4c 89 ef mov %r13,%rdi 38: e8 3b d5 ff ff callq 0xffffd578 3d: 49 rex.WB 3e: 8d .byte 0x8d 3f: 5d pop %rbp