WARNING in __skb_flow

Kernel	Title	Rank 🛈	Repro	Cause bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in __skb_flow_dissect (6) net	-1			1	431d	431d	27/29	fixed on 2024/08/14 19:57
upstream	WARNING in __skb_flow_dissect net	-1	syz		3	2466d	2467d	11/29	fixed on 2018/10/11 18:37
upstream	WARNING in __skb_flow_dissect (3) net	-1	syz		224	2370d	2459d	11/29	fixed on 2019/03/06 07:43
upstream	WARNING in __skb_flow_dissect (4) net	-1	C	error	6	980d	989d	22/29	fixed on 2023/02/24 13:50

------------[ cut here ]------------ WARNING: CPU: 1 PID: 4623 at net/core/flow_dissector.c:1096 __skb_flow_dissect+0xc73/0x7d00 net/core/flow_dissector.c:1096 Modules linked in: CPU: 1 PID: 4623 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-05271-gf99c5f563c17 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/29/2024 RIP: 0010:__skb_flow_dissect+0xc73/0x7d00 net/core/flow_dissector.c:1096 Code: 65 00 00 80 3d 67 9d 2d 06 01 0f 85 8a 65 00 00 e8 02 53 51 f8 e9 99 fa ff ff e8 f8 52 51 f8 e9 eb f9 ff ff e8 ee 52 51 f8 90 <0f> 0b 90 e9 de 03 00 00 e8 e0 52 51 f8 c6 05 32 9d 2d 06 01 48 c7 RSP: 0000:ffffc90000a07980 EFLAGS: 00010246 RAX: ffffffff89439d82 RBX: 0000000000000000 RCX: ffff888015b3bc00 RDX: 0000000000000301 RSI: 0000000000000000 RDI: ffff88807d7477f0 RBP: ffffc90000a07fa8 R08: ffffffff8943936d R09: 0000000000000000 R10: ffffc90000a08080 R11: fffff5200014101a R12: dffffc0000000000 R13: 0000000000000000 R14: ffffffff8f871d12 R15: ffffffff8f871d08 FS: 000055557e2c9480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000000020000220 CR3: 000000001daf6000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <IRQ> skb_flow_dissect_flow_keys include/linux/skbuff.h:1546 [inline] ___skb_get_hash+0x55/0x800 net/core/flow_dissector.c:1791 __skb_get_hash+0xbc/0x410 net/core/flow_dissector.c:1856 skb_get_hash include/linux/skbuff.h:1588 [inline] nft_trace_init+0x1e5/0x440 net/netfilter/nf_tables_trace.c:320 nft_do_chain+0x1c42/0x1da0 net/netfilter/nf_tables_core.c:268 nft_do_chain_inet+0x418/0x6b0 net/netfilter/nft_chain_filter.c:161 nf_hook_entry_hookfn include/linux/netfilter.h:154 [inline] nf_hook_slow+0xc3/0x220 net/netfilter/core.c:626 nf_hook include/linux/netfilter.h:269 [inline] __ip6_local_out+0x6fa/0x800 net/ipv6/output_core.c:143 ip6_local_out+0x26/0x70 net/ipv6/output_core.c:153 ip6tunnel_xmit include/net/ip6_tunnel.h:161 [inline] udp_tunnel6_xmit_skb+0x590/0x9d0 net/ipv6/ip6_udp_tunnel.c:111 tipc_udp_xmit+0x6a3/0xa10 net/tipc/udp_media.c:217 tipc_udp_send_msg+0x26b/0x3d0 net/tipc/udp_media.c:268 tipc_bearer_xmit_skb+0x2f5/0x460 net/tipc/bearer.c:571 tipc_disc_timeout+0x5ee/0x760 net/tipc/discover.c:338 call_timer_fn+0x17e/0x600 kernel/time/timer.c:1792 expire_timers kernel/time/timer.c:1843 [inline] __run_timers kernel/time/timer.c:2408 [inline] __run_timer_base+0x66a/0x8e0 kernel/time/timer.c:2419 run_timer_base kernel/time/timer.c:2428 [inline] run_timer_softirq+0xb7/0x170 kernel/time/timer.c:2438 __do_softirq+0x2bc/0x943 kernel/softirq.c:554 invoke_softirq kernel/softirq.c:428 [inline] __irq_exit_rcu+0xf2/0x1c0 kernel/softirq.c:633 irq_exit_rcu+0x9/0x30 kernel/softirq.c:645 instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1043 [inline] sysvec_apic_timer_interrupt+0xa6/0xc0 arch/x86/kernel/apic/apic.c:1043 </IRQ> <TASK> asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:702 RIP: 0010:__raw_spin_unlock_irq include/linux/spinlock_api_smp.h:160 [inline] RIP: 0010:_raw_spin_unlock_irq+0x29/0x50 kernel/locking/spinlock.c:202 Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 fa 16 f7 f5 48 89 df e8 b2 56 f8 f5 e8 2d 77 21 f6 fb bf 01 00 00 00 <e8> 42 43 ea f5 65 8b 05 93 25 89 74 85 c0 74 06 5b c3 cc cc cc cc RSP: 0000:ffffc9000d7e7c50 EFLAGS: 00000282 RAX: 3483501b5e27f500 RBX: ffff88802a0fdc80 RCX: ffffffff944bf403 RDX: dffffc0000000000 RSI: ffffffff8baac220 RDI: 0000000000000001 RBP: ffffc9000d7e7d90 R08: ffffffff8f86ae6f R09: 1ffffffff1f0d5cd R10: dffffc0000000000 R11: fffffbfff1f0d5ce R12: 1ffff1100541fbcb R13: 0000000044000004 R14: 000000000000000b R15: ffff88802a0fde58 spin_unlock_irq include/linux/spinlock.h:401 [inline] get_signal+0x156e/0x1850 kernel/signal.c:2910 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:310 exit_to_user_mode_loop kernel/entry/common.c:105 [inline] exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline] irqentry_exit_to_user_mode+0x79/0x270 kernel/entry/common.c:225 exc_page_fault+0x585/0x890 arch/x86/mm/fault.c:1566 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:623 RIP: 0033:0x7fa1eb42c514 Code: c0 08 0f b7 c0 48 8b 54 24 10 66 89 02 e9 71 fd ff ff 48 8b 44 24 08 48 85 c0 0f 85 6c fe ff ff 48 8b 44 24 10 0f b6 54 24 18 <88> 10 e9 52 fd ff ff 48 8b 44 24 20 48 0b 44 24 28 75 31 48 8b 54 RSP: 002b:00007ffda1931040 EFLAGS: 00010246 RAX: 0000000020000220 RBX: 0000000000000001 RCX: 0000000000000000 RDX: 0000000000000085 RSI: 0000000000000000 RDI: 000055557e2c9360 RBP: 0000000000000001 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa1eb007cc0 R13: fffffffffffffffe R14: 00007fa1eb000000 R15: 00007fa1eb007cc8 </TASK> ---------------- Code disassembly (best guess): 0: 90 nop 1: f3 0f 1e fa endbr64 5: 53 push %rbx 6: 48 89 fb mov %rdi,%rbx 9: 48 83 c7 18 add $0x18,%rdi d: 48 8b 74 24 08 mov 0x8(%rsp),%rsi 12: e8 fa 16 f7 f5 call 0xf5f71711 17: 48 89 df mov %rbx,%rdi 1a: e8 b2 56 f8 f5 call 0xf5f856d1 1f: e8 2d 77 21 f6 call 0xf6217751 24: fb sti 25: bf 01 00 00 00 mov $0x1,%edi * 2a: e8 42 43 ea f5 call 0xf5ea4371 <-- trapping instruction 2f: 65 8b 05 93 25 89 74 mov %gs:0x74892593(%rip),%eax # 0x748925c9 36: 85 c0 test %eax,%eax 38: 74 06 je 0x40 3a: 5b pop %rbx 3b: c3 ret 3c: cc int3 3d: cc int3 3e: cc int3 3f: cc int3

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2024/03/28 09:50	net	f99c5f563c17	454571b6	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-net-this-kasan-gce	WARNING in __skb_flow_dissect

Crashes (1):

Assets (help?)