KMSAN: uninit-value in lec_atm

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
e7cbc62d	assessment-security	DenialOfService: ❌ Exploitable: ❌ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ❌ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	KMSAN: uninit-value in lec_atm_send	2026/05/26 16:20	2026/05/26 16:20	2026/05/26 17:09	76d4b4b1

Title	Replies (including bot)	Last reply
[PATCH net v3] net: atm: implement pre_send to check input before sending	6 (6)	2025/12/11 10:30
[PATCH v3] net: atm: lec: add pre_send validation to avoid uninitialized	2 (2)	2025/12/10 10:28
[PATCH] net: atm: lec: add pre_send validation to avoid uninitialized	5 (5)	2025/12/08 19:11
[syzbot] [net?] KMSAN: uninit-value in lec_atm_send	0 (2)	2025/12/07 03:29
[PATCH] net: atm: targetless need more input msg	6 (6)	2025/12/04 10:35

Title

Replies (including bot)

Last reply

[PATCH net v3] net: atm: implement pre_send to check input before sending

6 (6)

2025/12/11 10:30

[PATCH v3] net: atm: lec: add pre_send validation to avoid uninitialized

2 (2)

2025/12/10 10:28

[PATCH] net: atm: lec: add pre_send validation to avoid uninitialized

5 (5)

2025/12/08 19:11

[syzbot] [net?] KMSAN: uninit-value in lec_atm_send

0 (2)

2025/12/07 03:29

[PATCH] net: atm: targetless need more input msg

6 (6)

2025/12/04 10:35

Created	Duration	User	Patch	Repo	Result
2026/05/10 21:19	35m	retest repro		upstream	OK log
2026/03/01 20:10	20m	retest repro		upstream	report log
2026/03/01 19:52	19m	retest repro		upstream	report log
2025/12/11 10:50	23m	retest repro		upstream	report log
2025/12/07 03:29	32m	dharanitharan725@gmail.com	patch	upstream	OK log

Created

Duration

User

Patch

Repo

Result

2026/05/10 21:19

35m

retest repro

upstream

OK log

2026/03/01 20:10

20m

retest repro

upstream

report log

2026/03/01 19:52

19m

retest repro

upstream

report log

2025/12/11 10:50

23m

retest repro

upstream

report log

2025/12/07 03:29

32m

dharanitharan725@gmail.com

patch

upstream

OK log

===================================================== BUG: KMSAN: uninit-value in lec_atm_send+0x28bf/0x55a0 net/atm/lec.c:417 lec_atm_send+0x28bf/0x55a0 net/atm/lec.c:417 vcc_sendmsg+0x104e/0x11b0 net/atm/common.c:650 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xf37/0xfd0 net/socket.c:2592 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2681 x64_sys_call+0x1e20/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was stored to memory at: lec_atm_send+0x28b8/0x55a0 net/atm/lec.c:417 vcc_sendmsg+0x104e/0x11b0 net/atm/common.c:650 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xf37/0xfd0 net/socket.c:2592 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2681 x64_sys_call+0x1e20/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Uninit was created at: slab_post_alloc_hook mm/slub.c:4545 [inline] slab_alloc_node mm/slub.c:4866 [inline] kmem_cache_alloc_node_noprof+0x3cd/0x12d0 mm/slub.c:4918 kmalloc_reserve net/core/skbuff.c:613 [inline] __alloc_skb+0x855/0x1190 net/core/skbuff.c:713 alloc_skb include/linux/skbuff.h:1383 [inline] vcc_sendmsg+0x601/0x11b0 net/atm/common.c:628 sock_sendmsg_nosec net/socket.c:727 [inline] __sock_sendmsg net/socket.c:742 [inline] ____sys_sendmsg+0xf37/0xfd0 net/socket.c:2592 ___sys_sendmsg+0x271/0x3b0 net/socket.c:2646 __sys_sendmsg net/socket.c:2678 [inline] __do_sys_sendmsg net/socket.c:2683 [inline] __se_sys_sendmsg net/socket.c:2681 [inline] __x64_sys_sendmsg+0x211/0x3e0 net/socket.c:2681 x64_sys_call+0x1e20/0x3ea0 arch/x86/include/generated/asm/syscalls_64.h:47 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x134/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f CPU: 0 UID: 0 PID: 18186 Comm: syz.9.2051 Tainted: G W syzkaller #0 PREEMPT(full) Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 =====================================================

Crashes (11):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/16 04:24	upstream	f338e7738378	ee8d34d6	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2026/02/15 18:42	upstream	ca4ee40bf13d	1e62d198	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2026/02/14 16:04	upstream	770aaedb461a	1e62d198	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2026/02/14 16:04	upstream	770aaedb461a	1e62d198	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2025/11/25 21:35	upstream	8a2bcda5e139	64219f15	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2025/11/24 21:05	upstream	ac3fd01e4c1e	bf6fe8fe	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2025/11/24 11:55	upstream	ac3fd01e4c1e	4fb8ef37	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in lec_atm_send
2026/04/14 09:40	upstream	0f0013213293	1a086e7c	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-386-root	KMSAN: uninit-value in lec_atm_send
2025/11/27 09:27	upstream	4941a17751c9	d6526ea3	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-386-root	KMSAN: uninit-value in lec_atm_send
2025/11/27 09:19	upstream	4941a17751c9	d6526ea3	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-386-root	KMSAN: uninit-value in lec_atm_send
2025/11/27 09:16	upstream	4941a17751c9	d6526ea3	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-386-root	KMSAN: uninit-value in lec_atm_send

Crashes (11):

Assets (help?)