general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 8346 Comm: kworker/u4:19 Not tainted 6.2.0-rc6-next-20230203-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/12/2023 Workqueue: phy15 ieee80211_iface_work RIP: 0010:__skb_unlink include/linux/skbuff.h:2321 [inline] RIP: 0010:__skb_dequeue include/linux/skbuff.h:2337 [inline] RIP: 0010:skb_dequeue+0xf5/0x180 net/core/skbuff.c:3511 Code: 8d 7e 08 49 8b 5c 24 08 48 b8 00 00 00 00 00 fc ff df 49 c7 44 24 08 00 00 00 00 48 89 fa 49 c7 04 24 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 6d 48 89 da 49 89 5e 08 48 b8 00 00 00 00 00 fc ff RSP: 0000:ffffc90015aa7c80 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff880a2eed RDI: 0000000000000008 RBP: 0000000000000293 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52002b54f7e R11: 0000000000000000 R12: ffff88804a03c140 R13: ffff888076e11880 R14: 0000000000000000 R15: ffff888076e11868 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffedef36f58 CR3: 000000002aff4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: ieee80211_iface_work+0x369/0xd70 net/mac80211/iface.c:1631 process_one_work+0x9bf/0x1820 kernel/workqueue.c:2390 worker_thread+0x669/0x1090 kernel/workqueue.c:2537 kthread+0x2e8/0x3a0 kernel/kthread.c:376 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:308 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:__skb_unlink include/linux/skbuff.h:2321 [inline] RIP: 0010:__skb_dequeue include/linux/skbuff.h:2337 [inline] RIP: 0010:skb_dequeue+0xf5/0x180 net/core/skbuff.c:3511 Code: 8d 7e 08 49 8b 5c 24 08 48 b8 00 00 00 00 00 fc ff df 49 c7 44 24 08 00 00 00 00 48 89 fa 49 c7 04 24 00 00 00 00 48 c1 ea 03 <80> 3c 02 00 75 6d 48 89 da 49 89 5e 08 48 b8 00 00 00 00 00 fc ff RSP: 0000:ffffc90015aa7c80 EFLAGS: 00010002 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000001 RSI: ffffffff880a2eed RDI: 0000000000000008 RBP: 0000000000000293 R08: 0000000000000001 R09: 0000000000000003 R10: fffff52002b54f7e R11: 0000000000000000 R12: ffff88804a03c140 R13: ffff888076e11880 R14: 0000000000000000 R15: ffff888076e11868 FS: 0000000000000000(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffedef36f58 CR3: 000000002aff4000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 8d 7e 08 lea 0x8(%rsi),%edi 3: 49 8b 5c 24 08 mov 0x8(%r12),%rbx 8: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax f: fc ff df 12: 49 c7 44 24 08 00 00 movq $0x0,0x8(%r12) 19: 00 00 1b: 48 89 fa mov %rdi,%rdx 1e: 49 c7 04 24 00 00 00 movq $0x0,(%r12) 25: 00 26: 48 c1 ea 03 shr $0x3,%rdx * 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2e: 75 6d jne 0x9d 30: 48 89 da mov %rbx,%rdx 33: 49 89 5e 08 mov %rbx,0x8(%r14) 37: 48 rex.W 38: b8 00 00 00 00 mov $0x0,%eax 3d: 00 fc add %bh,%ah 3f: ff .byte 0xff