syzbot

device syz_tun entered promiscuous mode
bridge0: port 3(syz_tun) entered blocking state
bridge0: port 3(syz_tun) entered forwarding state
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WARNING: CPU: 1 PID: 4040 at net/bridge/br_netfilter_hooks.c:634 br_nf_local_in+0x410/0x488 net/bridge/br_netfilter_hooks.c:634
Modules linked in:
CPU: 1 PID: 4040 Comm: syz-executor218 Not tainted 5.15.184-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/07/2025
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : br_nf_local_in+0x410/0x488 net/bridge/br_netfilter_hooks.c:634
lr : br_nf_local_in+0x410/0x488 net/bridge/br_netfilter_hooks.c:634
sp : ffff80001f216ad0
x29: ffff80001f216af0 x28: ffff0000c803f310 x27: 1fffe00019007e60
x26: 0000000000000000 x25: 1fffe000181f9138 x24: dfff800000000000
x23: ffff800012d29740 x22: ffff0000c0fc89c0 x21: ffff0000c87e6c80
x20: 0000000000000000 x19: 0000000000000000 x18: 0000000000000402
x17: ffff800016cdf000 x16: ffff8000082bf2b8 x15: ffff8000167bf4c0
x14: ffff0000dac74080 x13: ffff0000dac740f8 x12: 0000000000ff0100
x11: 0000000000000200 x10: 0000000000000000 x9 : ffff8000103954a8
x8 : ffff0000dac73680 x7 : 0000000000000000 x6 : 0000000000000000
x5 : 0000000000000000 x4 : 0000000000000000 x3 : ffff800008044e7c
x2 : 0000000000000001 x1 : 0000000000000000 x0 : 0000000000000000
Call trace:
 br_nf_local_in+0x410/0x488 net/bridge/br_netfilter_hooks.c:634
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_slow+0xb4/0x1f4 net/netfilter/core.c:584
 nf_hook include/linux/netfilter.h:257 [inline]
 NF_HOOK+0x224/0x358 include/linux/netfilter.h:300
 br_pass_frame_up+0x28c/0x3e8 net/bridge/br_input.c:70
 br_handle_frame_finish+0xca4/0xf30 net/bridge/br_input.c:-1
 br_nf_hook_thresh net/bridge/br_netfilter_hooks.c:-1 [inline]
 br_nf_pre_routing_finish+0xfb8/0x1920 net/bridge/br_netfilter_hooks.c:429
 NF_HOOK+0x55c/0x5ec include/linux/netfilter.h:302
 br_nf_pre_routing+0xaf0/0x1018 net/bridge/br_netfilter_hooks.c:538
 nf_hook_entry_hookfn include/linux/netfilter.h:142 [inline]
 nf_hook_bridge_pre net/bridge/br_input.c:242 [inline]
 br_handle_frame+0x70c/0xe70 net/bridge/br_input.c:384
 __netif_receive_skb_core+0xce8/0x2e90 net/core/dev.c:5419
 __netif_receive_skb_one_core net/core/dev.c:5523 [inline]
 __netif_receive_skb+0x78/0x2ac net/core/dev.c:5639
 netif_receive_skb_internal net/core/dev.c:5725 [inline]
 netif_receive_skb+0x1cc/0x7e0 net/core/dev.c:5784
 tun_rx_batched+0x478/0x5b4 drivers/net/tun.c:-1
 tun_get_user+0x1f48/0x31c4 drivers/net/tun.c:1989
 tun_chr_write_iter+0xfc/0x20c drivers/net/tun.c:2019
 call_write_iter include/linux/fs.h:2172 [inline]
 new_sync_write fs/read_write.c:507 [inline]
 vfs_write+0x7c8/0xa2c fs/read_write.c:594
 ksys_write+0x120/0x210 fs/read_write.c:647
 __do_sys_write fs/read_write.c:659 [inline]
 __se_sys_write fs/read_write.c:656 [inline]
 __arm64_sys_write+0x7c/0x90 fs/read_write.c:656
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x78/0x1e0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0xcc/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584
irq event stamp: 1449
hardirqs last  enabled at (1448): [<ffff80000819c354>] __local_bh_enable_ip+0x1f8/0x380 kernel/softirq.c:388
hardirqs last disabled at (1449): [<ffff8000111a0f18>] el1_dbg+0x24/0x80 arch/arm64/kernel/entry-common.c:396
softirqs last  enabled at (1348): [<ffff80000c4f5278>] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:31
softirqs last disabled at (1350): [<ffff80000c4f5244>] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:18
---[ end trace 15cc0a7a853547b2 ]---