On Thu, Oct 15, 2026 at 12:43 AM <[email protected]> wrote:
>
> Hi!
>
> This is an automated message. This series looks like a fix, but its
> commit messages seem to be missing some information:
>
> - How the issue was discovered, e.g. hit in production, hit during
> development, syzbot report, manual code inspection, LLM or static
> analysis tool scan.
>
The issue was discovered in production, here is an example warning:
------------[ cut here ]------------
WARNING: CPU: 1 PID: 939331 at include/linux/thread_info.h:249
tcp_sendmsg+0x10c1/0x1530
Modules linked in: kvm_amd hdi2_standard_ftl hdi2_megablocks hdi2
xenolith stg elephant_dev_num nv_p2p_glue vfat fat livepatch_v1(OEK)
k10temp i2c_piix4 i2c_via_ipmi i2c_mux_ltc4306 google_bmc_usb gq
cdc_acm xhci_pciJun 18 01:48:26.051200 rdht15 kernel: [66690.105140]
CPU: 1 UID: 368767421 PID: 939331 Comm: DefaultEventMan Kdump: loaded
Tainted: P S W OE K 6.12.63-smp-1400.86.0.0 #1
Tainted: [P]=PROPRIETARY_MODULE, [S]=CPU_OUT_OF_SPEC, [W]=WARN,
[O]=OOT_MODULE, [E]=UNSIGNED_MODULE, [K]=LIVEPATCH
Hardware name: Google, Inc.
Arcadia_IT_80/Arcadia_IT_80, BIOS 34.86.0-0 01/25/2026
RIP: 0010:tcp_sendmsg+0x10c1/0x1530
Code: ee 44 8b 64 24 3c 0f 84 ae f5 ff ff 48 8b 7c 24 48 e8 f3 a7 23
00 41 be f2 ff ff ff 4c 8b 6c 24 10 44 8b 24 24 e9 4a 03 00 00 <0f> 0b
31 c0 e9 7e f5 ff ff 41 80 8f 84 00 00 00 01 e9 00 f6 ff ff
RSP: 0018:ffffbaff64a6fc38 EFLAGS: 00010282
RAX: 0000000000000062 RBX: ffff9c45670d3c00 RCX: 25c2e5210d8ebf01
RDX: 0000000000600000 RSI: 00000000fff8427f RDI: ffff9c43f2fc0062
RBP: ffffffffffe4b17f R08: 0000000000000000 R09: 0000000000000002
R10: ffff9c4c187b6200 R11: 00000000000001b6 R12: 0000000000000000
R13: ffff9c4383ffc1e8 R14: 00000000ffe4b17f R15: ffff9c40fe838600
FS: 00007fe39fbaf700(0000) GS:ffff9c874ce40000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000010986487a238 CR3: 0000000973fb8006 CR4: 0000000000f70ef0
PKRU: 55555554
Call Trace:
<TASK>
[<ffffffffa5c218a2>] __sys_sendmsg+0x292/0x490
[<ffffffffa5c6281f>] ? restore_sigcontext+0x15f/0x1c0
[<ffffffffa5c6e1d0>] ? __pfx_flush_tlb_func+0x10/0x10
[<ffffffffa5c6e965>] ? flush_tlb_local+0x285/0x2a0
[<ffffffffa5ba1b29>] ? sched_clock+0x9/0x10
[<ffffffffa5bd7900>] ? sched_clock_cpu+0x10/0x180
[<ffffffffa5be362a>] ? generic_smp_call_function_single_interrupt+0x19a/0x430
[<ffffffffa5f51848>] do_syscall_64+0x88/0x340
[<ffffffffa6000136>] entry_SYSCALL_64_after_hwframe+0x76/0x7e
RIP: 0033:0x5580e3f28a3d.
