skbuff: skb_over_panic: text:ffffffff881761fb len:4096 put:4096 head:ffff88801f4ac400 data:ffff88801f4ac400 tail:0x1000 end:0xc0 dev: ------------[ cut here ]------------ kernel BUG at net/core/skbuff.c:111! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 1 PID: 14529 Comm: syz-executor.3 Not tainted 5.15.0-rc4-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:111 Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 20 8b 8b 8a ff 74 24 10 ff 74 24 20 e8 84 0f c3 ff <0f> 0b e8 24 b8 45 f8 4c 8b 64 24 18 e8 fa 03 8d f8 48 c7 c1 c0 97 RSP: 0018:ffffc90000dc0af0 EFLAGS: 00010282 RAX: 000000000000008b RBX: ffff88806f04b780 RCX: 0000000000000000 RDX: ffff88807b97b900 RSI: ffffffff815daf18 RDI: fffff520001b8150 RBP: ffffffff8a8b9800 R08: 000000000000008b R09: 0000000000000000 R10: ffffffff815d4cbe R11: 0000000000000000 R12: ffffffff881761fb R13: 0000000000001000 R14: ffffffff8a8b8ae0 R15: 00000000000000c0 FS: 00007f6d4f4da700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000072018000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: skb_over_panic net/core/skbuff.c:116 [inline] skb_put.cold+0x24/0x24 net/core/skbuff.c:1980 isotp_rcv_cf net/can/isotp.c:570 [inline] isotp_rcv+0xa4b/0x1e60 net/can/isotp.c:668 deliver net/can/af_can.c:574 [inline] can_rcv_filter+0x445/0x8d0 net/can/af_can.c:635 can_receive+0x31d/0x580 net/can/af_can.c:665 can_rcv+0x120/0x1c0 net/can/af_can.c:696 __netif_receive_skb_one_core+0x114/0x180 net/core/dev.c:5436 __netif_receive_skb+0x24/0x1b0 net/core/dev.c:5550 process_backlog+0x2a5/0x6c0 net/core/dev.c:6427 __napi_poll+0xaf/0x440 net/core/dev.c:6986 napi_poll net/core/dev.c:7053 [inline] net_rx_action+0x801/0xb40 net/core/dev.c:7140 __do_softirq+0x29b/0x9c2 kernel/softirq.c:558 invoke_softirq kernel/softirq.c:432 [inline] __irq_exit_rcu+0x123/0x180 kernel/softirq.c:636 irq_exit_rcu+0x5/0x20 kernel/softirq.c:648 sysvec_apic_timer_interrupt+0x93/0xc0 arch/x86/kernel/apic/apic.c:1097 asm_sysvec_apic_timer_interrupt+0x12/0x20 arch/x86/include/asm/idtentry.h:638 RIP: 0010:__sanitizer_cov_trace_pc+0x4c/0x60 kernel/kcov.c:202 Code: 0e 85 c9 74 35 8b 82 3c 15 00 00 85 c0 74 2b 8b 82 18 15 00 00 83 f8 02 75 20 48 8b 8a 20 15 00 00 8b 92 1c 15 00 00 48 8b 01 <48> 83 c0 01 48 39 c2 76 07 48 89 34 c1 48 89 01 c3 0f 1f 00 41 55 RSP: 0018:ffffc9000c5172b0 EFLAGS: 00000246 RAX: 00000000000151fd RBX: ffffc9000c517310 RCX: ffffc900105ad000 RDX: 0000000000040000 RSI: ffffffff816527a5 RDI: ffffc9000c517310 RBP: ffffc9000c5172d8 R08: 0000000000000000 R09: ffff88807b97b907 R10: ffffed100f72f720 R11: 0000000000000000 R12: ffffc9000c517310 R13: 1ffffffff16c1e30 R14: ffff88801aac0b00 R15: 0000000000000000 native_save_fl arch/x86/include/asm/irqflags.h:29 [inline] arch_local_save_flags arch/x86/include/asm/irqflags.h:70 [inline] arch_local_irq_save arch/x86/include/asm/irqflags.h:106 [inline] del_timer_sync+0x15/0x1b0 kernel/time/timer.c:1363 schedule_timeout+0x152/0x2a0 kernel/time/timer.c:1882 io_schedule_timeout+0xcb/0x140 kernel/sched/core.c:8377 blk_io_schedule+0x4c/0x70 block/blk-core.c:1747 __iomap_dio_rw+0x11b8/0x1980 fs/iomap/direct-io.c:627 iomap_dio_rw+0x30/0x90 fs/iomap/direct-io.c:649 ext4_dio_write_iter fs/ext4/file.c:568 [inline] ext4_file_write_iter+0xe18/0x14e0 fs/ext4/file.c:678 call_write_iter include/linux/fs.h:2163 [inline] do_iter_readv_writev+0x472/0x750 fs/read_write.c:729 do_iter_write+0x188/0x710 fs/read_write.c:855 vfs_iter_write+0x70/0xa0 fs/read_write.c:896 iter_file_splice_write+0x723/0xc70 fs/splice.c:689 do_splice_from fs/splice.c:767 [inline] direct_splice_actor+0x110/0x180 fs/splice.c:936 splice_direct_to_actor+0x34b/0x8c0 fs/splice.c:891 do_splice_direct+0x1b3/0x280 fs/splice.c:979 do_sendfile+0xae9/0x1240 fs/read_write.c:1249 __do_sys_sendfile64 fs/read_write.c:1314 [inline] __se_sys_sendfile64 fs/read_write.c:1300 [inline] __x64_sys_sendfile64+0x1cc/0x210 fs/read_write.c:1300 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f6d51f638d9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f6d4f4da188 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f6d52067f60 RCX: 00007f6d51f638d9 RDX: 0000000000000000 RSI: 0000000000000005 RDI: 0000000000000004 RBP: 00007f6d51fbdcb4 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000401ffc000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f6d5259bb2f R14: 00007f6d4f4da300 R15: 0000000000022000 Modules linked in: ---[ end trace 17910c15d3f64696 ]--- RIP: 0010:skb_panic+0x16c/0x16e net/core/skbuff.c:111 Code: f8 4c 8b 4c 24 10 8b 4b 70 41 56 45 89 e8 4c 89 e2 41 57 48 89 ee 48 c7 c7 20 8b 8b 8a ff 74 24 10 ff 74 24 20 e8 84 0f c3 ff <0f> 0b e8 24 b8 45 f8 4c 8b 64 24 18 e8 fa 03 8d f8 48 c7 c1 c0 97 RSP: 0018:ffffc90000dc0af0 EFLAGS: 00010282 RAX: 000000000000008b RBX: ffff88806f04b780 RCX: 0000000000000000 RDX: ffff88807b97b900 RSI: ffffffff815daf18 RDI: fffff520001b8150 RBP: ffffffff8a8b9800 R08: 000000000000008b R09: 0000000000000000 R10: ffffffff815d4cbe R11: 0000000000000000 R12: ffffffff881761fb R13: 0000000000001000 R14: ffffffff8a8b8ae0 R15: 00000000000000c0 FS: 00007f6d4f4da700(0000) GS:ffff8880b9d00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000000000000 CR3: 0000000072018000 CR4: 00000000003506e0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 85 c9 test %ecx,%ecx 2: 74 35 je 0x39 4: 8b 82 3c 15 00 00 mov 0x153c(%rdx),%eax a: 85 c0 test %eax,%eax c: 74 2b je 0x39 e: 8b 82 18 15 00 00 mov 0x1518(%rdx),%eax 14: 83 f8 02 cmp $0x2,%eax 17: 75 20 jne 0x39 19: 48 8b 8a 20 15 00 00 mov 0x1520(%rdx),%rcx 20: 8b 92 1c 15 00 00 mov 0x151c(%rdx),%edx 26: 48 8b 01 mov (%rcx),%rax * 29: 48 83 c0 01 add $0x1,%rax <-- trapping instruction 2d: 48 39 c2 cmp %rax,%rdx 30: 76 07 jbe 0x39 32: 48 89 34 c1 mov %rsi,(%rcx,%rax,8) 36: 48 89 01 mov %rax,(%rcx) 39: c3 retq 3a: 0f 1f 00 nopl (%rax) 3d: 41 55 push %r13