------------[ cut here ]------------
1
WARNING: ./include/linux/skbuff.h:3003 at skb_reset_mac_len include/linux/skbuff.h:3003 [inline], CPU#2: syz.1.826/7955
WARNING: ./include/linux/skbuff.h:3003 at __netif_receive_skb_core.constprop.0+0x1706/0x3530 net/core/dev.c:6061, CPU#2: syz.1.826/7955
Modules linked in:
CPU: 2 UID: 0 PID: 7955 Comm: syz.1.826 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:skb_reset_mac_len include/linux/skbuff.h:3003 [inline]
RIP: 0010:__netif_receive_skb_core.constprop.0+0x1706/0x3530 net/core/dev.c:6061
Code: de 4c 8b bc 24 e8 00 00 00 e8 36 e6 6b f8 85 db 0f 88 11 f2 ff ff 31 db 4d 8d af 81 00 00 00 e9 01 ed ff ff e8 ab eb 6b f8 90 <0f> 0b 90 31 db e9 43 eb ff ff e8 9b eb 6b f8 e8 76 9b 4f f8 31 ff
RSP: 0018:ffffc90000658990 EFLAGS: 00010246
RAX: 0000000000000000 RBX: 0000000000000040 RCX: 0000000000000101
RDX: ffff8880236c8000 RSI: ffffffff89a03405 RDI: ffff8880236c8000
RBP: 000000000000ffff R08: 0000000000000003 R09: 000000000000ffff
R10: 000000000000ffff R11: 0000000000000001 R12: ffff888035eccb40
R13: ffffc90000658c10 R14: ffff888035eccb40 R15: ffff888035eccb40
FS:  00007fb403d176c0(0000) GS:ffff8880d5d59000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00002000000bf000 CR3: 000000003dc50000 CR4: 0000000000352ef0
Call Trace:
 <IRQ>
 __netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:6262
 __netif_receive_skb+0x1f/0x120 net/core/dev.c:6377
 process_backlog+0x487/0x1600 net/core/dev.c:6728
 __napi_poll.constprop.0+0xaf/0x450 net/core/dev.c:7787
 napi_poll net/core/dev.c:7850 [inline]
 net_rx_action+0xa40/0xf20 net/core/dev.c:8007
 handle_softirqs+0x1e6/0x9d0 kernel/softirq.c:645
 do_softirq kernel/softirq.c:546 [inline]
 do_softirq+0xaf/0xf0 kernel/softirq.c:533
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0xff/0x120 kernel/softirq.c:473
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 netif_rx net/core/dev.c:5837 [inline]
 netif_rx+0x93/0xb0 net/core/dev.c:5826
 slcan_bump_err drivers/net/can/slcan/slcan-core.c:448 [inline]
 slcan_bump drivers/net/can/slcan/slcan-core.c:463 [inline]
 slcan_unesc drivers/net/can/slcan/slcan-core.c:476 [inline]
 slcan_receive_buf+0x1a66/0x1f30 drivers/net/can/slcan/slcan-core.c:807
 tiocsti drivers/tty/tty_io.c:2263 [inline]
 tty_ioctl+0x8fd/0x1640 drivers/tty/tty_io.c:2679
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl fs/ioctl.c:583 [inline]
 __x64_sys_ioctl+0x18e/0x210 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb402d9e159
Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 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 e8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fb403d17028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb403025fa0 RCX: 00007fb402d9e159
RDX: 0000200000000230 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007fb402e3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb403026038 R14: 00007fb403025fa0 R15: 00007ffe2f004778
 </TASK>