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KASAN: slab-out-of-bounds Write in udf_readdir

Status: upstream: reported C repro on 2024/04/15 06:11
Bug presence: origin:lts-only
[Documentation on labels]
Reported-by: syzbot+136740e3b42e006e87fb@syzkaller.appspotmail.com
First crash: 22d, last: 2d04h
▶ ▼ Bug presence (2)
Date Name Commit Repro Result
2024/05/04 linux-5.15.y (ToT) 284087d4f7d5 C [report] KASAN: slab-out-of-bounds Write in udf_readdir
2024/05/04 upstream (ToT) 7367539ad4b0 C Didn't crash
▶ ▼ Similar bugs (1)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 KASAN: slab-out-of-bounds Write in udf_readdir origin:lts-only C done 7 13d 18d 0/3 upstream: reported C repro on 2024/04/19 05:30

Sample crash report:
loop0: detected capacity change from 0 to 2048
UDF-fs: INFO Mounting volume 'LiuxUDF', timestamp 2022/11/22 14:59 (1000)
==================================================================
BUG: KASAN: slab-out-of-bounds in udf_readdir+0xcaa/0x2170 fs/udf/dir.c:182
Write of size 201 at addr ffff88801e4c3a36 by task syz-executor330/3498

CPU: 1 PID: 3498 Comm: syz-executor330 Not tainted 5.15.155-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2d0 lib/dump_stack.c:106
 print_address_description+0x63/0x3b0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x16b/0x1c0 mm/kasan/report.c:451
 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:189
 memcpy+0x3c/0x60 mm/kasan/shadow.c:66
 udf_readdir+0xcaa/0x2170 fs/udf/dir.c:182
 iterate_dir+0x224/0x570
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0
RIP: 0033:0x7f7d5ffe4b39
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffd13bb6558 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f7d5ffe4b39
RDX: 0000000000001000 RSI: 0000000020000f80 RDI: 0000000000000005
RBP: 00007f7d60058610 R08: 0000000000000000 R09: 00007ffd13bb6728
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffd13bb6718 R14: 0000000000000001 R15: 0000000000000001
 </TASK>

Allocated by task 3498:
 kasan_save_stack mm/kasan/common.c:38 [inline]
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:434 [inline]
 ____kasan_kmalloc+0xba/0xf0 mm/kasan/common.c:513
 kasan_kmalloc include/linux/kasan.h:264 [inline]
 kmem_cache_alloc_trace+0x143/0x290 mm/slub.c:3247
 kmalloc include/linux/slab.h:591 [inline]
 udf_readdir+0xbc6/0x2170 fs/udf/dir.c:172
 iterate_dir+0x224/0x570
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x209/0x4f0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3b/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x66/0xd0

The buggy address belongs to the object at ffff88801e4c3a00
 which belongs to the cache kmalloc-256 of size 256
The buggy address is located 54 bytes inside of
 256-byte region [ffff88801e4c3a00, ffff88801e4c3b00)
The buggy address belongs to the page:
page:ffffea0000793080 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1e4c2
head:ffffea0000793080 order:1 compound_mapcount:0
flags: 0xfff80000010200(slab|head|node=0|zone=1|lastcpupid=0xfff)
raw: 00fff80000010200 ffffea000511ef00 0000000600000006 ffff888011c41b40
raw: 0000000000000000 0000000080100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 1, migratetype Unmovable, gfp_mask 0xd2000(__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 1, ts 11209578772, free_ts 0
 prep_new_page mm/page_alloc.c:2426 [inline]
 get_page_from_freelist+0x322a/0x33c0 mm/page_alloc.c:4159
 __alloc_pages+0x272/0x700 mm/page_alloc.c:5423
 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2031
 alloc_slab_page mm/slub.c:1775 [inline]
 allocate_slab mm/slub.c:1912 [inline]
 new_slab+0xbb/0x4b0 mm/slub.c:1975
 ___slab_alloc+0x6f6/0xe10 mm/slub.c:3008
 __slab_alloc mm/slub.c:3095 [inline]
 slab_alloc_node mm/slub.c:3186 [inline]
 slab_alloc mm/slub.c:3228 [inline]
 kmem_cache_alloc_trace+0x1a0/0x290 mm/slub.c:3245
 kmalloc include/linux/slab.h:591 [inline]
 usb_string+0x10f/0x790 drivers/usb/core/message.c:979
 usb_cache_string+0x79/0xf0 drivers/usb/core/message.c:1029
 usb_enumerate_device drivers/usb/core/hub.c:2438 [inline]
 usb_new_device+0x389/0x18e0 drivers/usb/core/hub.c:2563
 register_root_hub+0x25f/0x540 drivers/usb/core/hcd.c:1021
 usb_add_hcd+0xc4e/0x1250 drivers/usb/core/hcd.c:3001
 vhci_hcd_probe+0x1f0/0x3b0 drivers/usb/usbip/vhci_hcd.c:1376
 platform_probe+0x131/0x1b0 drivers/base/platform.c:1391
 really_probe+0x24e/0xb60 drivers/base/dd.c:595
 __driver_probe_device+0x1a2/0x3d0 drivers/base/dd.c:755
 driver_probe_device+0x50/0x420 drivers/base/dd.c:785
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88801e4c3980: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801e4c3a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88801e4c3a80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 06
                                                                ^
 ffff88801e4c3b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88801e4c3b80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================

Crashes (23):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2024/04/15 07:06 linux-5.15.y fa3df276cd36 c8349e48 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/05/05 13:14 linux-5.15.y 284087d4f7d5 610f2a54 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/26 03:42 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/26 03:42 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/26 03:42 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/26 03:42 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/25 01:37 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/24 00:25 linux-5.15.y c52b9710c83d 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/23 23:08 linux-5.15.y c52b9710c83d 21339d7b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/22 03:56 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/21 10:47 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/21 10:42 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/21 10:30 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/21 10:29 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/21 10:27 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/20 02:04 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/20 02:04 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/20 02:04 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/20 02:04 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/20 02:04 linux-5.15.y c52b9710c83d af24b050 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/15 06:10 linux-5.15.y fa3df276cd36 c8349e48 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/25 06:51 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: slab-out-of-bounds Write in udf_readdir
2024/04/25 06:50 linux-5.15.y c52b9710c83d 8bdc0f22 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: slab-out-of-bounds Write in udf_readdir
* Struck through repros no longer work on HEAD.