------------[ cut here ]------------ WARNING: ./include/linux/skbuff.h:3003 at skb_reset_mac_len include/linux/skbuff.h:-1 [inline], CPU#0: kworker/u8:12/3512 WARNING: ./include/linux/skbuff.h:3003 at __netif_receive_skb_core+0x260/0x2b60 net/core/dev.c:6061, CPU#0: kworker/u8:12/3512 Modules linked in: CPU: 0 UID: 0 PID: 3512 Comm: kworker/u8:12 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/14/2026 Workqueue: events_unbound flush_to_ldisc pstate: 43400005 (nZcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : skb_reset_mac_len include/linux/skbuff.h:-1 [inline] pc : __netif_receive_skb_core+0x260/0x2b60 net/core/dev.c:6061 lr : skb_reset_mac_len include/linux/skbuff.h:3003 [inline] lr : __netif_receive_skb_core+0x25c/0x2b60 net/core/dev.c:6061 sp : ffff80008ec37880 x29: ffff80008ec37ac0 x28: ffff700011d86f30 x27: dfff800000000000 x26: 1ffff00011d1bfc0 x25: ffff0000f4dd8000 x24: ffff80008ec37980 x23: ffff0000d00f1d80 x22: 0000000000000000 x21: 0000000000000000 x20: 000000000000ffff x19: ffff0000f4c13b40 x18: 00000000ffffffff x17: ffff800125154000 x16: ffff80008ec30000 x15: ffff800084ca2bec x14: ffff80008b0df2b0 x13: 0000000000000009 x12: 0000000000000000 x11: 0000000009528823 x10: 0000000000000003 x9 : 0000000000000101 x8 : 0000000000000000 x7 : ffff800084d0f334 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800084d05aac x2 : 000000000000ffff x1 : ffff0000d00f1d80 x0 : 0000000000000000 Call trace: skb_reset_mac_len include/linux/skbuff.h:-1 [inline] (P) __netif_receive_skb_core+0x260/0x2b60 net/core/dev.c:6061 (P) __netif_receive_skb_one_core+0x70/0x110 net/core/dev.c:6262 __netif_receive_skb+0x34/0x128 net/core/dev.c:6377 process_backlog+0x5f4/0x16f8 net/core/dev.c:6728 __napi_poll+0xb4/0x328 net/core/dev.c:7787 napi_poll net/core/dev.c:7850 [inline] net_rx_action+0x5b0/0xc14 net/core/dev.c:8007 handle_softirqs+0x2ec/0xd98 kernel/softirq.c:645 __do_softirq+0x14/0x20 kernel/softirq.c:679 ____do_softirq+0x14/0x20 arch/arm64/kernel/irq.c:78 call_on_irq_stack+0x30/0x48 arch/arm64/kernel/entry.S:885 do_softirq_own_stack+0x20/0x2c arch/arm64/kernel/irq.c:83 do_softirq+0x90/0xf8 kernel/softirq.c:546 __local_bh_enable_ip+0x240/0x35c kernel/softirq.c:473 local_bh_enable include/linux/bottom_half.h:33 [inline] netif_rx+0xb4/0xd4 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+0x12f8/0x1a68 drivers/net/can/slcan/slcan-core.c:807 tty_ldisc_receive_buf+0x12c/0x15c drivers/tty/tty_buffer.c:398 tty_port_default_receive_buf+0x74/0xac drivers/tty/tty_port.c:37 receive_buf drivers/tty/tty_buffer.c:452 [inline] flush_to_ldisc+0x1d8/0x578 drivers/tty/tty_buffer.c:502 process_one_work kernel/workqueue.c:3387 [inline] process_scheduled_works+0x91c/0x1250 kernel/workqueue.c:3470 worker_thread+0x798/0xbd0 kernel/workqueue.c:3551 kthread+0x304/0x3d4 kernel/kthread.c:436 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:838 irq event stamp: 49541 hardirqs last enabled at (49540): [] __raw_spin_unlock_irq include/linux/spinlock_api_smp.h:219 [inline] hardirqs last enabled at (49540): [] _raw_spin_unlock_irq+0x30/0x80 kernel/locking/spinlock.c:229 hardirqs last disabled at (49541): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:445 softirqs last enabled at (49534): [] local_bh_enable include/linux/bottom_half.h:33 [inline] softirqs last enabled at (49534): [] netif_rx+0xac/0xd4 net/core/dev.c:5837 softirqs last disabled at (49535): [] __do_softirq+0x14/0x20 kernel/softirq.c:679 ---[ end trace 0000000000000000 ]---