WARNING in packet_sendmsg (2)

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
263a7f89-925e-428e-b8a9-e9e7cf80cf51	repro		❓	WARNING in packet_sendmsg (2)	2026/03/06 00:31	2026/03/06 00:31	2026/03/06 00:41	31e9c887f7dc24e04b3ca70d0d54fc34141844b0

Kernel	Title	Rank 🛈	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
upstream	WARNING in packet_sendmsg net	-1				1	287d	287d	0/29	closed as invalid on 2025/08/19 11:22

Kernel

Title

Rank 🛈

upstream

WARNING in packet_sendmsg net

-1

287d

0/29

closed as invalid on 2025/08/19 11:22

------------[ cut here ]------------ WARNING: ./include/linux/skbuff.h:3122 at skb_reset_network_header include/linux/skbuff.h:3122 [inline], CPU#3: syz.1.2496/14488 WARNING: ./include/linux/skbuff.h:3122 at packet_snd net/packet/af_packet.c:3035 [inline], CPU#3: syz.1.2496/14488 WARNING: ./include/linux/skbuff.h:3122 at packet_sendmsg+0x49eb/0x54a0 net/packet/af_packet.c:3108, CPU#3: syz.1.2496/14488 Modules linked in: CPU: 3 UID: 0 PID: 14488 Comm: syz.1.2496 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:skb_reset_network_header include/linux/skbuff.h:3122 [inline] RIP: 0010:packet_snd net/packet/af_packet.c:3035 [inline] RIP: 0010:packet_sendmsg+0x49eb/0x54a0 net/packet/af_packet.c:3108 Code: 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 59 08 00 00 41 8b 9e cc 00 00 00 48 01 eb e9 88 c5 ff ff e8 56 64 7d f7 90 <0f> 0b 90 e9 a3 df ff ff e8 48 64 7d f7 48 8b 54 24 18 48 b8 00 00 RSP: 0018:ffffc90006e9fae0 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffffc90006e9fd58 RCX: ffffffff8a416439 RDX: ffff88802f7bc980 RSI: ffffffff8a41849a RDI: 0000000000000007 RBP: ffffffffffffff84 R08: 0000000000000007 R09: 000000000000ffff R10: ffffffffffffff84 R11: 0000000000000000 R12: ffff888053ce0a00 R13: 000000000000002c R14: ffff888022c8c000 R15: 000000000000000e FS: 00007fcfe64ac6c0(0000) GS:ffff8880d6bf5000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fcfe64abf98 CR3: 000000004eb64000 CR4: 0000000000352ef0 Call Trace: <TASK> sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] __sys_sendto+0x4a3/0x520 net/socket.c:2206 __do_sys_sendto net/socket.c:2213 [inline] __se_sys_sendto net/socket.c:2209 [inline] __x64_sys_sendto+0xe0/0x1c0 net/socket.c:2209 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xcd/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fcfe558f7c9 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fcfe64ac038 EFLAGS: 00000246 ORIG_RAX: 000000000000002c RAX: ffffffffffffffda RBX: 00007fcfe57e6090 RCX: 00007fcfe558f7c9 RDX: 000000000000000e RSI: 0000200000000180 RDI: 0000000000000004 RBP: 00007fcfe5613f91 R08: 0000200000000140 R09: 0000000000000014 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fcfe57e6128 R14: 00007fcfe57e6090 R15: 00007ffdd27ec0e8 </TASK>

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/01/10 06:27	upstream	372800cb95a3	d1b870e1	.config	console log	report			info	[disk image (non-bootable)] [vmlinux] [kernel image]	ci-qemu-upstream	WARNING in packet_sendmsg

Crashes (1):

Assets (help?)