KASAN: stack-out-of-bounds Read in ft260_smbus

ID	Workflow	Result	Correct	Bug	Created	Started	Finished	Revision	Error
262d420e	assessment-security	DenialOfService: ✅ Exploitable: ✅ FilesystemTrigger: ❌ NetworkTrigger: ❌ PeripheralTrigger: ✅ RemoteTrigger: ❌ Unprivileged: ❌ UserNamespace: ❌ VMGuestTrigger: ❌ VMHostTrigger: ❌	❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/05/30 14:21	2026/05/30 14:21	2026/05/30 15:20	6b4a8443
ba481e10	assessment-security		💥	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/05/14 10:37	2026/05/14 10:37	2026/05/14 10:38	6ccb967e	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
48473ed4	patching		❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/01/31 21:11	2026/01/31 21:41	2026/01/31 21:58	2186dcab
bf67ab1e	patching		❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/01/30 13:36	2026/01/30 14:35	2026/01/30 14:54	22003bbf
b5308027	patching-summary		❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/01/30 08:58	2026/01/30 09:06	2026/01/30 09:33	dbc14c8a
f98dc19b	patching		❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/01/29 18:54	2026/01/29 18:54	2026/01/29 19:45	9f91b6e4
0be06909	patching-patching-nogikh		❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/01/29 14:28	2026/01/29 14:28	2026/01/29 15:32	63a5f77f
e71cd1f8	patching		❓	KASAN: stack-out-of-bounds Read in ft260_smbus_write	2026/01/28 22:43	2026/01/29 00:23	2026/01/29 00:49	8b9a9d26

Title	Replies (including bot)	Last reply
[PATCH] i2c: add sanity check for input SMBus data length	2 (2)	2026/05/19 09:43
[syzbot] Monthly input report (Apr 2026)	0 (1)	2026/04/21 06:08
[PATCH] i2c: core-smbus: validate block size in __i2c_smbus_xfer() for native SMBus path	1 (1)	2026/02/16 08:54
[PATCH] HID: ft260: fix block size validation in SMBus transfers	2 (2)	2026/02/06 22:22
[syzbot] [input?] KASAN: stack-out-of-bounds Read in ft260_smbus_write	2 (4)	2026/01/20 13:30

Title

Replies (including bot)

Last reply

[PATCH] i2c: add sanity check for input SMBus data length

2 (2)

2026/05/19 09:43

[syzbot] Monthly input report (Apr 2026)

0 (1)

2026/04/21 06:08

[PATCH] i2c: core-smbus: validate block size in __i2c_smbus_xfer() for native SMBus path

1 (1)

2026/02/16 08:54

[PATCH] HID: ft260: fix block size validation in SMBus transfers

2 (2)

2026/02/06 22:22

[syzbot] [input?] KASAN: stack-out-of-bounds Read in ft260_smbus_write

2 (4)

2026/01/20 13:30

Created	Duration	User	Patch	Repo	Result
2026/06/21 10:42	11m	retest repro		linux-next	error
2026/05/11 06:02	1h37m	retest repro		upstream	OK log
2026/04/10 18:58	59m	retest repro		linux-next	report log
2026/01/30 16:55	1h35m	retest repro		linux-next	report log
2026/01/30 16:44	1h31m	retest repro		upstream	report log
2026/01/20 13:30	0m	eadavis@qq.com	patch	upstream	error
2026/01/20 05:42	55m	aha310510@gmail.com	patch	upstream	OK log

Created

Duration

User

Patch

Repo

Result

2026/06/21 10:42

11m

retest repro

linux-next

error

2026/05/11 06:02

1h37m

retest repro

upstream

OK log

2026/04/10 18:58

59m

retest repro

linux-next

report log

2026/01/30 16:55

1h35m

retest repro

linux-next

report log

2026/01/30 16:44

1h31m

retest repro

upstream

report log

2026/01/20 13:30

eadavis@qq.com

patch

upstream

error

2026/01/20 05:42

55m

aha310510@gmail.com

patch

upstream

OK log

================================================================== BUG: KASAN: stack-out-of-bounds in ft260_smbus_write+0x156/0x2f0 drivers/hid/hid-ft260.c:486 Read of size 42 at addr ffffc9000ce27d21 by task syz.0.163/6206 CPU: 0 UID: 0 PID: 6206 Comm: syz.0.163 Not tainted syzkaller #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/25/2025 Call Trace: <TASK> dump_stack_lvl+0xe8/0x150 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xca/0x240 mm/kasan/report.c:482 kasan_report+0x118/0x150 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x2b0/0x2c0 mm/kasan/generic.c:200 __asan_memcpy+0x29/0x70 mm/kasan/shadow.c:105 ft260_smbus_write+0x156/0x2f0 drivers/hid/hid-ft260.c:486 ft260_smbus_xfer+0x8bc/0xdd0 drivers/hid/hid-ft260.c:-1 __i2c_smbus_xfer+0x557/0x1e20 drivers/i2c/i2c-core-smbus.c:591 i2c_smbus_xfer+0x1f4/0x310 drivers/i2c/i2c-core-smbus.c:546 i2cdev_ioctl_smbus+0x3db/0x750 drivers/i2c/i2c-dev.c:389 i2cdev_ioctl+0x5d3/0x820 drivers/i2c/i2c-dev.c:478 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+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f97ac58f749 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:00007ffcc9dab998 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f97ac7e5fa0 RCX: 00007f97ac58f749 RDX: 0000200000000200 RSI: 0000000000000720 RDI: 0000000000000004 RBP: 00007f97ac613f91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f97ac7e5fa0 R14: 00007f97ac7e5fa0 R15: 0000000000000003 </TASK> The buggy address belongs to stack of task syz.0.163/6206 and is located at offset 33 in frame: i2cdev_ioctl_smbus+0x0/0x750 drivers/i2c/i2c-dev.c:317 This frame has 1 object: [32, 66) 'temp' The buggy address belongs to a 8-page vmalloc region starting at 0xffffc9000ce20000 allocated at copy_process+0x4e8/0x3ba0 kernel/fork.c:2049 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x27477 memcg:ffff888031c54a82 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 ffffea00009d1dc8 0000000000000000 raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888031c54a82 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 0, migratetype Unmovable, gfp_mask 0x29c2(GFP_NOWAIT|__GFP_HIGHMEM|__GFP_IO|__GFP_FS|__GFP_ZERO), pid 5945, tgid 5945 (syz-executor), ts 175695068797, free_ts 175571170414 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x23d/0x2a0 mm/page_alloc.c:1887 prep_new_page mm/page_alloc.c:1895 [inline] get_page_from_freelist+0x23a5/0x2440 mm/page_alloc.c:3948 __alloc_frozen_pages_noprof+0x181/0x370 mm/page_alloc.c:5236 alloc_pages_mpol+0x232/0x4a0 mm/mempolicy.c:2486 alloc_frozen_pages_noprof mm/mempolicy.c:2557 [inline] alloc_pages_noprof+0xa9/0x190 mm/mempolicy.c:2577 vm_area_alloc_pages mm/vmalloc.c:3662 [inline] __vmalloc_area_node mm/vmalloc.c:3876 [inline] __vmalloc_node_range_noprof+0x795/0x16a0 mm/vmalloc.c:4064 __vmalloc_node_noprof+0xc2/0x110 mm/vmalloc.c:4124 alloc_thread_stack_node kernel/fork.c:354 [inline] dup_task_struct+0x228/0x9a0 kernel/fork.c:923 copy_process+0x4e8/0x3ba0 kernel/fork.c:2049 kernel_clone+0x21e/0x820 kernel/fork.c:2648 __do_sys_clone kernel/fork.c:2789 [inline] __se_sys_clone kernel/fork.c:2773 [inline] __x64_sys_clone+0x18b/0x1e0 kernel/fork.c:2773 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f page last free pid 6195 tgid 6195 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1436 [inline] __free_frozen_pages+0xb99/0xd10 mm/page_alloc.c:2976 discard_slab mm/slub.c:3580 [inline] __put_partials+0x146/0x170 mm/slub.c:4120 __slab_free+0x294/0x320 mm/slub.c:6193 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x97/0x100 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x148/0x160 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x22/0x80 mm/kasan/common.c:350 kasan_slab_alloc include/linux/kasan.h:253 [inline] slab_post_alloc_hook mm/slub.c:5187 [inline] slab_alloc_node mm/slub.c:5500 [inline] __do_kmalloc_node mm/slub.c:5893 [inline] __kmalloc_noprof+0x3cf/0x800 mm/slub.c:5906 kmalloc_noprof include/linux/slab.h:972 [inline] tomoyo_realpath_from_path+0xe3/0x5d0 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_number_perm+0x1e8/0x5a0 security/tomoyo/file.c:728 security_file_ioctl+0xcb/0x2d0 security/security.c:2435 __do_sys_ioctl fs/ioctl.c:591 [inline] __se_sys_ioctl+0x47/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xec/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc9000ce27c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000ce27c80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000ce27d00: f1 f1 f1 f1 00 00 00 00 02 f3 f3 f3 f3 f3 f3 f3 ^ ffffc9000ce27d80: 00 00 00 00 00 00 00 00 00 00 00 00 f1 f1 f1 f1 ffffc9000ce27e00: 04 f2 00 00 f2 f2 00 00 f3 f3 f3 f3 00 00 00 00 ==================================================================

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2026/01/16 14:22	linux-next	9b7977f9e39b	d6526ea3	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-rust-kasan-gce	KASAN: stack-out-of-bounds Read in ft260_smbus_write
2026/01/16 07:56	upstream	603c05a1639f	d6526ea3	.config	console log	report	syz / log	C		[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	KASAN: stack-out-of-bounds Read in ft260_smbus_write
2026/01/16 02:43	upstream	603c05a1639f	d6526ea3	.config	console log	report			info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	KASAN: stack-out-of-bounds Read in ft260_smbus_write

Crashes (3):

Assets (help?)