------------[ cut here ]------------
1
WARNING: ./include/linux/skbuff.h:3003 at skb_reset_mac_len include/linux/skbuff.h:3003 [inline], CPU#0: syz.1.899/8509
WARNING: ./include/linux/skbuff.h:3003 at __netif_receive_skb_core+0x294/0x30c0 net/core/dev.c:6061, CPU#0: syz.1.899/8509
Modules linked in:
CPU: 0 UID: 0 PID: 8509 Comm: syz.1.899 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:skb_reset_mac_len include/linux/skbuff.h:3003 [inline]
RIP: 0010:__netif_receive_skb_core+0x294/0x30c0 net/core/dev.c:6061
Code: f8 4d 8d b7 b8 00 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 28 84 c0 0f 85 87 2a 00 00 45 8b 36 41 29 de eb 0c e8 bd 99 02 f8 90 <0f> 0b 90 45 31 f6 48 8d 9c 24 e0 00 00 00 48 c7 84 24 b0 00 00 00
RSP: 0018:ffffc90000007a00 EFLAGS: 00010246
RAX: ffffffff89c56b33 RBX: 000000000000ffff RCX: ffff888026ff0000
RDX: 8000000000000100 RSI: 0000000000000100 RDI: 000000000000ffff
RBP: ffffc90000007c40 R08: 0000000000000100 R09: 1ffffffff213766f
R10: dffffc0000000000 R11: fffffbfff2137670 R12: 0000000000000000
R13: dffffc0000000000 R14: 0000000000000040 R15: ffff88802e25d000
FS:  00007fb9d7d486c0(0000) GS:ffff88812485b000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055dedfcd8200 CR3: 000000003463e000 CR4: 00000000003526f0
Call Trace:
 <IRQ>
 __netif_receive_skb_one_core net/core/dev.c:6262 [inline]
 __netif_receive_skb net/core/dev.c:6377 [inline]
 process_backlog+0x727/0x18b0 net/core/dev.c:6728
 __napi_poll+0xaa/0x330 net/core/dev.c:7787
 napi_poll net/core/dev.c:7850 [inline]
 net_rx_action+0x61d/0xf50 net/core/dev.c:8007
 handle_softirqs+0x226/0x860 kernel/softirq.c:645
 do_softirq+0x77/0xd0 kernel/softirq.c:546
 </IRQ>
 <TASK>
 __local_bh_enable_ip+0x100/0x140 kernel/softirq.c:473
 local_bh_enable include/linux/bottom_half.h:33 [inline]
 netif_rx+0x89/0xa0 net/core/dev.c:5837
 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+0x1c5f/0x2140 drivers/net/can/slcan/slcan-core.c:807
 tiocsti+0x218/0x2a0 drivers/tty/tty_io.c:2263
 tty_ioctl+0x626/0xdd0 drivers/tty/tty_io.c:2679
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:597 [inline]
 __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583
 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline]
 do_syscall_64+0x166/0x520 arch/x86/entry/syscall_64.c:84
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fb9d6d9e159
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:00007fb9d7d48028 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 00007fb9d7025fa0 RCX: 00007fb9d6d9e159
RDX: 0000200000000230 RSI: 0000000000005412 RDI: 0000000000000004
RBP: 00007fb9d6e3506b R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fb9d7026038 R14: 00007fb9d7025fa0 R15: 00007ffcecdc2248
 </TASK>