KASAN: global-out-of-bounds Read in ip6gre

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
28d74b69-59e1-43e5-be2c-bfdb8ec47bb6	assessment-security		💥	KASAN: global-out-of-bounds Read in ip6gre_header	2026/05/15 07:06	2026/05/15 07:06	2026/05/15 07:07	6ccb967e465e832a7bfd7a116ad00d52a0923a5d	failed to run ["git" "pull" "origin" "HEAD" "--depth=1" "--allow-unrelated-histories"]: exit status 128 From /app/workdir/repo/linux * branch HEAD -> FETCH_HEAD Updating files: ... truncated to first 200 bytes; open job for full error

Title	Replies (including bot)	Last reply
[PATCH AUTOSEL 6.18] net: lapbether: handle NETDEV_PRE_TYPE_CHANGE	1 (1)	2026/04/20 13:22
[PATCH v2 net] net: lapbether: handle NETDEV_PRE_TYPE_CHANGE	3 (3)	2026/04/03 22:00
[PATCH net] net: lapbether: handle NETDEV_PRE_TYPE_CHANGE	2 (2)	2026/04/02 01:11
[syzbot] [net?] KASAN: global-out-of-bounds Read in ip6gre_header	0 (1)	2026/04/01 13:50

Title

Replies (including bot)

Last reply

[PATCH AUTOSEL 6.18] net: lapbether: handle NETDEV_PRE_TYPE_CHANGE

1 (1)

2026/04/20 13:22

[PATCH v2 net] net: lapbether: handle NETDEV_PRE_TYPE_CHANGE

3 (3)

2026/04/03 22:00

[PATCH net] net: lapbether: handle NETDEV_PRE_TYPE_CHANGE

2 (2)

2026/04/02 01:11

[syzbot] [net?] KASAN: global-out-of-bounds Read in ip6gre_header

0 (1)

2026/04/01 13:50

Created	Duration	User	Patch	Repo	Result
2026/04/01 12:32	24m	edumazet@google.com	patch	net-next	OK log
2026/04/01 11:59	0m	edumazet@google.com	patch	net-next	error
2026/03/30 17:42	48m	kuniyu@google.com	patch	net-next	report log

Created

Duration

User

Patch

Repo

Result

2026/04/01 12:32

24m

edumazet@google.com

OK log

edumazet@google.com

error

48m

kuniyu@google.com

patch

net-next

report log

================================================================== BUG: KASAN: global-out-of-bounds in ip6gre_header+0x5bf/0x860 net/ipv6/ip6_gre.c:1400 Read of size 16 at addr ffffffff8c6c4380 by task dhcpcd/5489 CPU: 0 UID: 0 PID: 5489 Comm: dhcpcd Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2026 Call Trace: <TASK> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xba/0x230 mm/kasan/report.c:482 kasan_report+0x117/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ip6gre_header+0x5bf/0x860 net/ipv6/ip6_gre.c:1400 bond_header_create+0x1ce/0x300 drivers/net/bonding/bond_main.c:1524 dev_hard_header include/linux/netdevice.h:3449 [inline] lapbeth_data_transmit+0x218/0x2e0 drivers/net/wan/lapbether.c:258 lapb_data_transmit+0x90/0xb0 net/lapb/lapb_iface.c:447 lapb_transmit_buffer+0x163/0x200 net/lapb/lapb_out.c:149 lapb_establish_data_link+0x89/0xe0 net/lapb/lapb_out.c:-1 lapb_device_event+0x4e1/0x670 net/lapb/lapb_iface.c:-1 notifier_call_chain+0x1be/0x400 kernel/notifier.c:85 call_netdevice_notifiers_extack net/core/dev.c:2285 [inline] call_netdevice_notifiers net/core/dev.c:2299 [inline] __dev_notify_flags+0x1a9/0x310 net/core/dev.c:9830 netif_change_flags+0xe8/0x1a0 net/core/dev.c:9859 dev_change_flags+0x130/0x260 net/core/dev_api.c:68 devinet_ioctl+0x9f2/0x1b30 net/ipv4/devinet.c:1199 inet_ioctl+0x42a/0x560 net/ipv4/af_inet.c:1011 sock_do_ioctl+0x101/0x320 net/socket.c:1247 sock_ioctl+0x5c6/0x7f0 net/socket.c:1368 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb458496378 Code: 00 00 48 8d 44 24 08 48 89 54 24 e0 48 89 44 24 c0 48 8d 44 24 d0 48 89 44 24 c8 b8 10 00 00 00 c7 44 24 b8 10 00 00 00 0f 05 <89> c2 3d 00 f0 ff ff 77 07 89 d0 c3 0f 1f 40 00 48 8b 15 49 3a 0d RSP: 002b:00007ffdede01158 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 0000000000000012 RCX: 00007fb458496378 RDX: 00007ffdede11350 RSI: 0000000000008914 RDI: 0000000000000012 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00007ffdede214f0 R13: 00007fb458396708 R14: 0000000000000028 R15: 0000000000008914 </TASK> The buggy address belongs to the variable: bcast_addr+0x0/0x20 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6c4 flags: 0xfff00000002000(reserved|node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000002000 ffffea000031b108 ffffea000031b108 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner info is not present (never set?) Memory state around the buggy address: ffffffff8c6c4280: 00 00 f9 f9 f9 f9 f9 f9 00 00 00 00 06 f9 f9 f9 ffffffff8c6c4300: f9 f9 f9 f9 00 00 00 00 00 02 f9 f9 f9 f9 f9 f9 >ffffffff8c6c4380: 06 f9 f9 f9 00 00 00 00 00 06 f9 f9 f9 f9 f9 f9 ^ ffffffff8c6c4400: 00 00 00 00 00 f9 f9 f9 f9 f9 f9 f9 00 00 00 00 ffffffff8c6c4480: 00 05 f9 f9 f9 f9 f9 f9 00 00 00 00 00 06 f9 f9 ==================================================================

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/03/30 12:16	net-next	cf0d9080c6f7	356bdfc9	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-net-kasan-gce	KASAN: global-out-of-bounds Read in ip6gre_header
2026/04/04 23:30	net-next	3741f8fa004b	4440e7c2	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-net-kasan-gce	KASAN: global-out-of-bounds Read in ip6gre_header
2026/03/30 07:16	net-next	02d0e59e36e0	356bdfc9	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-net-kasan-gce	KASAN: global-out-of-bounds Read in ip6gre_header

Crashes (3):

Assets (help?)