------------[ cut here ]------------
WARNING: CPU: 0 PID: 449 at net/core/flow_dissector.c:1107 __skb_flow_dissect+0xb05/0x6e70 net/core/flow_dissector.c:1102
Modules linked in:
CPU: 0 PID: 449 Comm: syz.0.7516 Not tainted syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 07/24/2026
RIP: 0010:__skb_flow_dissect+0xb05/0x6e70 net/core/flow_dissector.c:1107
Code: c6 e8 7f 5c 06 f9 85 db 0f 84 9a 06 00 00 80 3d 24 d4 f5 05 01 0f 85 c0 06 00 00 e8 b5 58 06 f9 e9 d5 f9 ff ff e8 ab 58 06 f9 <0f> 0b e8 b4 46 0e 02 89 c3 31 ff 89 c6 e8 49 5c 06 f9 85 db 74 18
RSP: 0018:ffffc90000006360 EFLAGS: 00010246
RAX: ffffffff888119c5 RBX: 0000000000000000 RCX: ffff8880246dda00
RDX: 0000000000000100 RSI: ffffffff8b1d3280 RDI: ffffffff8b1d3240
RBP: ffffc90000006978 R08: dffffc0000000000 R09: 1ffffffff223dca0
R10: dffffc0000000000 R11: fffffbfff223dca1 R12: ffffffff8e8ceff8
R13: 1ffffffff1d19e00 R14: ffffffff8e8cf002 R15: dffffc0000000000
FS: 0000000000000000(0000) GS:ffff8880b8e00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f38b7beb7c0 CR3: 0000000027356000 CR4: 00000000003506f0
Call Trace:
skb_flow_dissect_flow_keys include/linux/skbuff.h:1544 [inline]
___skb_get_hash net/core/flow_dissector.c:1806 [inline]
__skb_get_hash+0xf3/0x2e0 net/core/flow_dissector.c:1871
skb_get_hash include/linux/skbuff.h:1586 [inline]
nft_trace_init+0x1bb/0x420 net/netfilter/nf_tables_trace.c:316
nft_do_chain+0x1523/0x1620 net/netfilter/nf_tables_core.c:268
nft_do_chain_inet+0x29b/0x380 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook+0x228/0x390 include/linux/netfilter.h:259
__ip_local_out+0x4db/0x5f0 net/ipv4/ip_output.c:118
ip_local_out+0x2a/0x130 net/ipv4/ip_output.c:127
nf_send_reset+0xebd/0x16b0 net/ipv4/netfilter/nf_reject_ipv4.c:330
nft_reject_inet_eval+0x3ad/0x680 net/netfilter/nft_reject_inet.c:31
expr_call_ops_eval net/netfilter/nf_tables_core.c:240 [inline]
nft_do_chain+0x44b/0x1620 net/netfilter/nf_tables_core.c:288
nft_do_chain_inet+0x29b/0x380 net/netfilter/nft_chain_filter.c:161
nf_hook_entry_hookfn include/linux/netfilter.h:144 [inline]
nf_hook_slow+0xbd/0x200 net/netfilter/core.c:626
nf_hook+0x228/0x390 include/linux/netfilter.h:259
__ip_local_out+0x4db/0x5f0 net/ipv4/ip_output.c:118
ip_local_out net/ipv4/ip_output.c:127 [inline]
__ip_queue_xmit+0xf89/0x1960 net/ipv4/ip_output.c:540
__tcp_transmit_skb+0x1dd6/0x3470 net/ipv4/tcp_output.c:1427
tcp_transmit_skb net/ipv4/tcp_output.c:1445 [inline]
tcp_write_wakeup+0x460/0x720 net/ipv4/tcp_output.c:4224
tcp_send_probe0+0x50/0x530 net/ipv4/tcp_output.c:4246
tcp_write_timer+0x12a/0x280 net/ipv4/tcp_timer.c:709
call_timer_fn+0x189/0x540 kernel/time/timer.c:1701
expire_timers kernel/time/timer.c:1752 [inline]
__run_timers+0x570/0x810 kernel/time/timer.c:2023
run_timer_softirq+0x67/0xf0 kernel/time/timer.c:2036
handle_softirqs+0x27d/0x820 kernel/softirq.c:578
__do_softirq kernel/softirq.c:612 [inline]
invoke_softirq kernel/softirq.c:452 [inline]
__irq_exit_rcu+0xd3/0x190 kernel/softirq.c:661
irq_exit_rcu+0x9/0x20 kernel/softirq.c:673
instr_sysvec_apic_timer_interrupt arch/x86/kernel/apic/apic.c:1088 [inline]
sysvec_apic_timer_interrupt+0xa4/0xc0 arch/x86/kernel/apic/apic.c:1088
asm_sysvec_apic_timer_interrupt+0x1a/0x20 arch/x86/include/asm/idtentry.h:687
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: 00 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 da f5 cf f6 48 89 df e8 82 c9 d0 f6 e8 1d d1 f4 f6 fb bf 01 00 00 00 92 d7 c3 f6 65 8b 05 f3 a5 6a 75 85 c0 74 02 5b c3 e8 a0 8a 67
RSP: 0018:ffffc9000c63f378 EFLAGS: 00000286
RAX: 88dd0a853cc1db00 RBX: ffff888054729148 RCX: 88dd0a853cc1db00
RDX: dffffc0000000000 RSI: ffffffff8acacbe0 RDI: 0000000000000001
RBP: ffffc9000c63f630 R08: ffffffff911ee517 R09: 1ffffffff223dca2
R10: dffffc0000000000 R11: fffffbfff223dca3 R12: dffffc0000000000
R13: 1ffff1100a8e5228 R14: ffff888054729140 R15: ffff888054729148
spin_unlock_irq include/linux/spinlock.h:401 [inline]
filemap_remove_folio+0xf9/0x2c0 mm/filemap.c:258
truncate_inode_folio+0x5d/0x70 mm/truncate.c:195
shmem_undo_range+0x3f0/0x1a80 mm/shmem.c:1022
shmem_truncate_range mm/shmem.c:1135 [inline]
shmem_evict_inode+0x285/0xa70 mm/shmem.c:1264
evict+0x4b7/0x8a0 fs/inode.c:705
__dentry_kill+0x412/0x630 fs/dcache.c:611
dentry_kill+0xb8/0x290 fs/dcache.c:-1
dput+0xfe/0x1e0 fs/dcache.c:918
__fput+0x5b2/0x940 fs/file_table.c:426
task_work_run+0x1d4/0x260 kernel/task_work.c:245
exit_task_work include/linux/task_work.h:43 [inline]
do_exit+0x986/0x2530 kernel/exit.c:890
do_group_exit+0x22d/0x2f0 kernel/exit.c:1032
get_signal+0x12a6/0x1390 kernel/signal.c:2911
arch_do_signal_or_restart+0xc2/0x7b0 arch/x86/kernel/signal.c:310
exit_to_user_mode_loop+0x70/0x110 kernel/entry/common.c:174
exit_to_user_mode_prepare+0xee/0x180 kernel/entry/common.c:210
__syscall_exit_to_user_mode_work kernel/entry/common.c:291 [inline]
syscall_exit_to_user_mode+0x1a/0x50 kernel/entry/common.c:302
do_syscall_64+0x61/0xb0 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x68/0xd2
RIP: 0033:0x7f10bb19e0d9
Code: Unable to access opcode bytes at 0x7f10bb19e0af.
RSP: 002b:00007f10bc046028 EFLAGS: 00000246 ORIG_RAX: 000000000000012b
RAX: 0000000000010106 RBX: 00007f10bb426090 RCX: 00007f10bb19e0d9
RDX: 0000000000010106 RSI: 00002000000000c0 RDI: 0000000000000004
RBP: 00007f10bb235024 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000002 R11: 0000000000000246 R12: 0000000000000000
R13: 00007f10bb426128 R14: 00007f10bb426090 R15: 00007ffc637bc518
----------------
Code disassembly (best guess):
0: 00 f3 add %dh,%bl
2: 0f 1e fa nop %edx
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 da f5 cf f6 call 0xf6cff5f1
17: 48 89 df mov %rbx,%rdi
1a: e8 82 c9 d0 f6 call 0xf6d0c9a1
1f: e8 1d d1 f4 f6 call 0xf6f4d141
24: fb sti
25: bf 01 00 00 00 mov $0x1,%edi
* 2a: e8 92 d7 c3 f6 call 0xf6c3d7c1 <-- trapping instruction
2f: 65 8b 05 f3 a5 6a 75 mov %gs:0x756aa5f3(%rip),%eax # 0x756aa629
36: 85 c0 test %eax,%eax
38: 74 02 je 0x3c
3a: 5b pop %rbx
3b: c3 ret
3c: e8 .byte 0xe8
3d: a0 .byte 0xa0
3e: 8a .byte 0x8a
3f: 67 addr32