Hello, syzbot found the following issue on:
HEAD commit: 08b06c30a445 Merge tag 'v6.17-rc4-ksmbd-fix' of git://git... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=12e3087c580000 kernel config: https://syzkaller.appspot.com/x/.config?x=b7511150b112b9c3 dashboard link: https://syzkaller.appspot.com/bug?extid=aa8e2b2bfec0dd8e7e81 compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/d900f083ada3/non_bootable_disk-08b06c30.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/0e152fe53de2/vmlinux-08b06c30.xz kernel image: https://storage.googleapis.com/syzbot-assets/5a1bd9f48488/bzImage-08b06c30.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+aa8e2b2bfec0dd8e7...@syzkaller.appspotmail.com ------------[ cut here ]------------ WARNING: CPU: 3 PID: 8841 at net/bridge/br_netfilter_hooks.c:630 br_nf_local_in+0x714/0x7f0 net/bridge/br_netfilter_hooks.c:630 Modules linked in: CPU: 3 UID: 0 PID: 8841 Comm: syz.0.801 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:br_nf_local_in+0x714/0x7f0 net/bridge/br_netfilter_hooks.c:630 Code: 12 f7 4b f7 90 0f 0b 90 e9 e1 fb ff ff e8 04 f7 4b f7 be 03 00 00 00 48 89 ef e8 87 e8 73 fa e9 39 fa ff ff e8 ed f6 4b f7 90 <0f> 0b 90 e9 dc fd ff ff 4c 89 f7 e8 2c 56 b2 f7 e9 48 f9 ff ff 4c RSP: 0018:ffffc9000500efc0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffffffff8a6f9520 RDX: ffff8880255b4880 RSI: ffffffff8a6f9743 RDI: 0000000000000001 RBP: ffff88803a6b2900 R08: 0000000000000001 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000008 R13: ffff88803a6b29c0 R14: 0000000000000000 R15: ffff88803608d874 FS: 00007faf552176c0(0000) GS:ffff8880d69b8000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007faf55216f98 CR3: 000000001fa82000 CR4: 0000000000352ef0 Call Trace: <TASK> nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_slow+0xbe/0x200 net/netfilter/core.c:623 nf_hook.constprop.0+0x3e7/0x6b0 include/linux/netfilter.h:273 NF_HOOK include/linux/netfilter.h:316 [inline] br_pass_frame_up+0x307/0x490 net/bridge/br_input.c:70 br_handle_frame_finish+0xf5a/0x1ca0 net/bridge/br_input.c:227 br_nf_hook_thresh+0x307/0x410 net/bridge/br_netfilter_hooks.c:1170 br_nf_pre_routing_finish+0x8a1/0x1810 net/bridge/br_netfilter_hooks.c:425 NF_HOOK include/linux/netfilter.h:318 [inline] NF_HOOK include/linux/netfilter.h:312 [inline] br_nf_pre_routing+0xf7b/0x15b0 net/bridge/br_netfilter_hooks.c:534 nf_hook_entry_hookfn include/linux/netfilter.h:158 [inline] nf_hook_bridge_pre net/bridge/br_input.c:283 [inline] br_handle_frame+0xad5/0x14b0 net/bridge/br_input.c:434 __netif_receive_skb_core.constprop.0+0xa22/0x48c0 net/core/dev.c:5878 __netif_receive_skb_one_core+0xb0/0x1e0 net/core/dev.c:5989 __netif_receive_skb+0x1d/0x160 net/core/dev.c:6104 netif_receive_skb_internal net/core/dev.c:6190 [inline] netif_receive_skb+0x137/0x7b0 net/core/dev.c:6249 tun_rx_batched.isra.0+0x3ee/0x740 drivers/net/tun.c:1509 tun_get_user+0x28e4/0x3ce0 drivers/net/tun.c:1950 tun_chr_write_iter+0xdc/0x210 drivers/net/tun.c:1996 new_sync_write fs/read_write.c:593 [inline] vfs_write+0x7d3/0x11d0 fs/read_write.c:686 ksys_write+0x12a/0x250 fs/read_write.c:738 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0x4c0 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faf5438d69f Code: 89 54 24 18 48 89 74 24 10 89 7c 24 08 e8 f9 92 02 00 48 8b 54 24 18 48 8b 74 24 10 41 89 c0 8b 7c 24 08 b8 01 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 31 44 89 c7 48 89 44 24 08 e8 4c 93 02 00 48 RSP: 002b:00007faf55217000 EFLAGS: 00000293 ORIG_RAX: 0000000000000001 RAX: ffffffffffffffda RBX: 00007faf545c5fa0 RCX: 00007faf5438d69f RDX: 000000000000002a RSI: 0000200000000000 RDI: 00000000000000c8 RBP: 00007faf54411e19 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000002a R11: 0000000000000293 R12: 0000000000000000 R13: 00007faf545c6038 R14: 00007faf545c5fa0 R15: 00007fffb9e76588 </TASK> --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkal...@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
