KASAN: slab-out-of-bounds Read in seq

Kernel	Title	Repro	Count	Last	Reported	Patched	Status
upstream	KMSAN: uninit-value in seq_printf (2) fs	C	99	1034d	1301d	0/28	auto-closed as invalid on 2022/09/30 02:43
upstream	KMSAN: kernel-infoleak in __skb_datagram_iter net		68	566d	671d	23/28	fixed on 2023/09/28 17:51
upstream	KMSAN: uninit-value in seq_printf fs		3	1958d	1986d	0/28	auto-closed as invalid on 2020/03/04 05:44

================================================================== BUG: KASAN: slab-out-of-bounds in string_nocheck lib/vsprintf.c:632 [inline] BUG: KASAN: slab-out-of-bounds in string+0x4a6/0x4f0 lib/vsprintf.c:714 Read of size 1 at addr ffff888035075a20 by task syz.1.712/9185 CPU: 1 UID: 0 PID: 9185 Comm: syz.1.712 Not tainted 6.13.0-syzkaller-01005-gb9d8a295ed6b #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 Call Trace: <TASK> __dump_stack lib/dump_stack.c:94 [inline] dump_stack_lvl+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:378 [inline] print_report+0xc3/0x620 mm/kasan/report.c:489 kasan_report+0xd9/0x110 mm/kasan/report.c:602 string_nocheck lib/vsprintf.c:632 [inline] string+0x4a6/0x4f0 lib/vsprintf.c:714 vsnprintf+0x4c8/0x1180 lib/vsprintf.c:2843 seq_vprintf fs/seq_file.c:391 [inline] seq_printf+0x1a6/0x250 fs/seq_file.c:406 input_devices_seq_show+0x20e/0x1130 drivers/input/input.c:1172 traverse.part.0.constprop.0+0x104/0x640 fs/seq_file.c:111 traverse fs/seq_file.c:98 [inline] seq_read_iter+0x934/0x12b0 fs/seq_file.c:195 seq_read+0x39f/0x4e0 fs/seq_file.c:162 pde_read fs/proc/inode.c:308 [inline] proc_reg_read+0x23d/0x330 fs/proc/inode.c:320 do_loop_readv_writev fs/read_write.c:840 [inline] do_loop_readv_writev fs/read_write.c:828 [inline] vfs_readv+0x6bf/0x890 fs/read_write.c:1013 do_preadv+0x1b1/0x270 fs/read_write.c:1125 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f9b13785d29 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:00007f9b145f1038 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f9b13976160 RCX: 00007f9b13785d29 RDX: 0000000000000001 RSI: 0000000020003780 RDI: 0000000000000008 RBP: 00007f9b13801b08 R08: 0000000000000000 R09: 0000000000000000 R10: 000000000000ffff R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9b13976160 R15: 00007ffdfef419a8 </TASK> Allocated by task 8706: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 poison_kmalloc_redzone mm/kasan/common.c:377 [inline] __kasan_kmalloc+0xaa/0xb0 mm/kasan/common.c:394 kasan_kmalloc include/linux/kasan.h:260 [inline] __do_kmalloc_node mm/slub.c:4298 [inline] __kmalloc_noprof+0x21c/0x510 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:822 security_inode_getattr+0x116/0x290 security/security.c:2372 vfs_getattr fs/stat.c:243 [inline] vfs_statx_path+0x2b/0x310 fs/stat.c:283 vfs_statx+0x11f/0x1c0 fs/stat.c:347 vfs_fstatat+0x7b/0xf0 fs/stat.c:366 __do_sys_newfstatat+0x98/0x120 fs/stat.c:530 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Freed by task 8706: kasan_save_stack+0x33/0x60 mm/kasan/common.c:47 kasan_save_track+0x14/0x30 mm/kasan/common.c:68 kasan_save_free_info+0x3b/0x60 mm/kasan/generic.c:582 poison_slab_object mm/kasan/common.c:247 [inline] __kasan_slab_free+0x51/0x70 mm/kasan/common.c:264 kasan_slab_free include/linux/kasan.h:233 [inline] slab_free_hook mm/slub.c:2353 [inline] slab_free mm/slub.c:4613 [inline] kfree+0x14f/0x4b0 mm/slub.c:4761 tomoyo_realpath_from_path+0x1ad/0x720 security/tomoyo/realpath.c:286 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:822 security_inode_getattr+0x116/0x290 security/security.c:2372 vfs_getattr fs/stat.c:243 [inline] vfs_statx_path+0x2b/0x310 fs/stat.c:283 vfs_statx+0x11f/0x1c0 fs/stat.c:347 vfs_fstatat+0x7b/0xf0 fs/stat.c:366 __do_sys_newfstatat+0x98/0x120 fs/stat.c:530 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f The buggy address belongs to the object at ffff888035074000 which belongs to the cache kmalloc-4k of size 4096 The buggy address is located 2592 bytes to the right of allocated 4096-byte region [ffff888035074000, ffff888035075000) The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x35070 head: order:3 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0 flags: 0xfff00000000040(head|node=0|zone=1|lastcpupid=0x7ff) page_type: f5(slab) raw: 00fff00000000040 ffff88801b042140 dead000000000122 0000000000000000 raw: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000040 ffff88801b042140 dead000000000122 0000000000000000 head: 0000000000000000 0000000000040004 00000001f5000000 0000000000000000 head: 00fff00000000003 ffffea0000d41c01 ffffffffffffffff 0000000000000000 head: 0000000000000008 0000000000000000 00000000ffffffff 0000000000000000 page dumped because: kasan: bad access detected page_owner tracks the page as allocated page last allocated via order 3, migratetype Unmovable, gfp_mask 0xd2040(__GFP_IO|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 8706, tgid 8706 (syz-executor), ts 385768035678, free_ts 385705829653 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x2d1/0x350 mm/page_alloc.c:1558 prep_new_page mm/page_alloc.c:1566 [inline] get_page_from_freelist+0xfce/0x2f80 mm/page_alloc.c:3476 __alloc_pages_noprof+0x221/0x2470 mm/page_alloc.c:4753 alloc_pages_mpol_noprof+0x2c8/0x620 mm/mempolicy.c:2269 alloc_slab_page mm/slub.c:2423 [inline] allocate_slab mm/slub.c:2589 [inline] new_slab+0x2c9/0x410 mm/slub.c:2642 ___slab_alloc+0xd75/0x17a0 mm/slub.c:3830 __slab_alloc.constprop.0+0x56/0xb0 mm/slub.c:3920 __slab_alloc_node mm/slub.c:3995 [inline] slab_alloc_node mm/slub.c:4156 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_noprof+0x2ec/0x510 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:822 security_inode_getattr+0x116/0x290 security/security.c:2372 vfs_getattr fs/stat.c:243 [inline] vfs_statx_path+0x2b/0x310 fs/stat.c:283 vfs_statx+0x11f/0x1c0 fs/stat.c:347 vfs_fstatat+0x7b/0xf0 fs/stat.c:366 __do_sys_newfstatat+0x98/0x120 fs/stat.c:530 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 page last free pid 9077 tgid 9077 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1127 [inline] free_unref_page+0x661/0x1080 mm/page_alloc.c:2659 __put_partials+0x14c/0x170 mm/slub.c:3157 qlink_free mm/kasan/quarantine.c:163 [inline] qlist_free_all+0x4e/0x120 mm/kasan/quarantine.c:179 kasan_quarantine_reduce+0x195/0x1e0 mm/kasan/quarantine.c:286 __kasan_slab_alloc+0x69/0x90 mm/kasan/common.c:329 kasan_slab_alloc include/linux/kasan.h:250 [inline] slab_post_alloc_hook mm/slub.c:4119 [inline] slab_alloc_node mm/slub.c:4168 [inline] __do_kmalloc_node mm/slub.c:4297 [inline] __kmalloc_noprof+0x1cd/0x510 mm/slub.c:4310 kmalloc_noprof include/linux/slab.h:905 [inline] tomoyo_realpath_from_path+0xb9/0x720 security/tomoyo/realpath.c:251 tomoyo_get_realpath security/tomoyo/file.c:151 [inline] tomoyo_path_perm+0x276/0x460 security/tomoyo/file.c:822 security_inode_getattr+0x116/0x290 security/security.c:2372 vfs_getattr fs/stat.c:243 [inline] vfs_fstat+0x4b/0xd0 fs/stat.c:265 vfs_fstatat+0xbc/0xf0 fs/stat.c:364 __do_sys_newfstatat+0x98/0x120 fs/stat.c:530 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xcd/0x250 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffff888035075900: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888035075980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc >ffff888035075a00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ^ ffff888035075a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ffff888035075b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc ==================================================================

Crashes (3):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Assets (help?)	Manager	Title
2025/01/22 09:39	upstream	b9d8a295ed6b	da72ac06	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce-selinux-root	KASAN: slab-out-of-bounds Read in seq_printf
2025/03/05 02:54	upstream	48a5eed9ad58	c3901742	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kmsan-gce-root	KMSAN: uninit-value in seq_printf
2025/02/03 21:23	upstream	2014c95afece	a21a8419	.config	console log	report	info	[disk image] [vmlinux] [kernel image]	ci-upstream-kasan-gce	KASAN: slab-use-after-free Read in seq_printf

Crashes (3):

Assets (help?)