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

Status: upstream: reported C repro on 2022/12/28 07:15
Labels: ntfs (incorrect?)
Reported-by: syzbot+d36761079ac1b585a6df@syzkaller.appspotmail.com
First crash: 160d, last: 10d

Cause bisection: failed (error log, bisect log)

Fix bisection: failed (error log, bisect log)
▶ ▼ Discussions (3)
Title Replies (including bot) Last reply
[syzbot] Monthly ntfs report (Jun 2023) 0 (1) 2023/06/02 08:40
[syzbot] Monthly ntfs report (May 2023) 0 (1) 2023/05/02 07:18
[syzbot] [ntfs?] KASAN: slab-out-of-bounds Read in ntfs_readdir 0 (1) 2022/12/28 07:15
▶ ▼ Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-5.15 KASAN: slab-out-of-bounds Read in ntfs_readdir 1 36d 36d 0/3 upstream: reported on 2023/04/27 08:51
linux-4.19 KASAN: slab-out-of-bounds Read in ntfs_readdir ntfs C error 1 149d 149d 0/1 upstream: reported C repro on 2023/01/04 05:55
linux-4.14 KASAN: slab-out-of-bounds Read in ntfs_readdir ntfs C 1 89d 152d 0/1 upstream: reported C repro on 2022/12/31 19:18

Sample crash report:
ntfs: (device loop0): map_mft_record_page(): Attempt to read mft record 0x10000, which is beyond the end of the mft.  This is probably a bug in the ntfs driver.
ntfs: (device loop0): map_mft_record(): Failed with error code 2.
==================================================================
BUG: KASAN: slab-out-of-bounds in ntfs_filldir fs/ntfs/dir.c:1021 [inline]
BUG: KASAN: slab-out-of-bounds in ntfs_readdir+0xebc/0x2bf0 fs/ntfs/dir.c:1200
Read of size 1 at addr ffff8880246e58f1 by task syz-executor221/5075

CPU: 1 PID: 5075 Comm: syz-executor221 Not tainted 6.1.0-syzkaller-14587-g51094a24b85e #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1b1/0x290 lib/dump_stack.c:106
 print_address_description+0x74/0x340 mm/kasan/report.c:306
 print_report+0x107/0x1f0 mm/kasan/report.c:417
 kasan_report+0xcd/0x100 mm/kasan/report.c:517
 ntfs_filldir fs/ntfs/dir.c:1021 [inline]
 ntfs_readdir+0xebc/0x2bf0 fs/ntfs/dir.c:1200
 iterate_dir+0x257/0x5f0
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x1db/0x4c0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f883ddee779
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 51 14 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 c0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffc802e3ce8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f883ddee779
RDX: 0000000000000098 RSI: 0000000020000080 RDI: 0000000000000004
RBP: 00007f883ddae010 R08: 0000000000000000 R09: 0000000000000000
R10: 000000000001e706 R11: 0000000000000246 R12: 00007f883ddae0a0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
 </TASK>

Allocated by task 5075:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x3d/0x60 mm/kasan/common.c:52
 ____kasan_kmalloc mm/kasan/common.c:371 [inline]
 __kasan_kmalloc+0x97/0xb0 mm/kasan/common.c:380
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slab_common.c:968 [inline]
 __kmalloc+0xaf/0x190 mm/slab_common.c:981
 kmalloc include/linux/slab.h:584 [inline]
 ntfs_readdir+0x830/0x2bf0 fs/ntfs/dir.c:1162
 iterate_dir+0x257/0x5f0
 __do_sys_getdents64 fs/readdir.c:369 [inline]
 __se_sys_getdents64+0x1db/0x4c0 fs/readdir.c:354
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

The buggy address belongs to the object at ffff8880246e5880
 which belongs to the cache kmalloc-64 of size 64
The buggy address is located 49 bytes to the right of
 64-byte region [ffff8880246e5880, ffff8880246e58c0)

The buggy address belongs to the physical page:
page:ffffea000091b940 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x246e5
flags: 0xfff00000000200(slab|node=0|zone=1|lastcpupid=0x7ff)
raw: 00fff00000000200 ffff888012841640 ffffea0000b00a80 dead000000000006
raw: 0000000000000000 0000000080200020 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, tgid 1 (swapper/0), ts 8652158942, free_ts 0
 prep_new_page mm/page_alloc.c:2531 [inline]
 get_page_from_freelist+0x742/0x7c0 mm/page_alloc.c:4283
 __alloc_pages+0x259/0x560 mm/page_alloc.c:5549
 alloc_page_interleave+0x22/0x1c0 mm/mempolicy.c:2119
 alloc_slab_page+0xbd/0x190 mm/slub.c:1851
 allocate_slab+0x5e/0x3c0 mm/slub.c:1998
 new_slab mm/slub.c:2051 [inline]
 ___slab_alloc+0x782/0xe20 mm/slub.c:3193
 __slab_alloc mm/slub.c:3292 [inline]
 __slab_alloc_node mm/slub.c:3345 [inline]
 slab_alloc_node mm/slub.c:3442 [inline]
 __kmem_cache_alloc_node+0x25b/0x340 mm/slub.c:3491
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc+0x9e/0x190 mm/slab_common.c:981
 kmalloc_array include/linux/slab.h:636 [inline]
 kobj_map+0x72/0x670 drivers/base/map.c:44
 cdev_add fs/char_dev.c:491 [inline]
 cdev_device_add+0x141/0x390 fs/char_dev.c:551
 cec_devnode_register drivers/media/cec/core/cec-core.c:144 [inline]
 cec_register_adapter+0x2e4/0x670 drivers/media/cec/core/cec-core.c:364
 vivid_create_devnodes+0x55c/0x2f90 drivers/media/test-drivers/vivid/vivid-core.c:1448
 vivid_create_instance drivers/media/test-drivers/vivid/vivid-core.c:1988 [inline]
 vivid_probe+0x550c/0x6e10 drivers/media/test-drivers/vivid/vivid-core.c:2041
 platform_probe+0x130/0x1b0 drivers/base/platform.c:1400
 call_driver_probe+0x96/0x250
 really_probe+0x24c/0x9f0 drivers/base/dd.c:639
page_owner free stack trace missing

Memory state around the buggy address:
 ffff8880246e5780: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff8880246e5800: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
>ffff8880246e5880: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
                                                             ^
 ffff8880246e5900: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc
 ffff8880246e5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc
==================================================================

Crashes (30):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2022/12/24 07:06 upstream 51094a24b85e 9da18ae8 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/05/22 16:54 upstream 44c026a73be8 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/05/07 17:49 upstream fc4354c6e5c2 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/05/07 17:14 upstream fc4354c6e5c2 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/05/06 23:22 upstream 2e1e1337881b 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/05/05 00:12 upstream 1a5304fecee5 518a39a6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/05/02 19:22 upstream 865fdb08197e 52d40fd2 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/29 16:23 upstream 89d77f71f493 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/26 08:56 upstream 0cfd8703e7da 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/26 00:49 upstream 173ea743bf7a 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/25 07:17 upstream 1a0beef98b58 65320f8e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/24 22:28 upstream 1a0beef98b58 fdc18293 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/24 04:17 upstream 457391b03803 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/24 03:10 upstream 457391b03803 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/24 00:37 upstream 457391b03803 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/22 10:36 upstream 8e41e0a57566 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/21 19:29 upstream 2af3e53a4dc0 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/21 18:47 upstream 2af3e53a4dc0 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/21 15:32 upstream 2af3e53a4dc0 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/20 05:50 upstream 789b4a41c247 a219f34e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/20 03:13 upstream 789b4a41c247 a219f34e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/16 23:54 upstream 3e7bb4f24617 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/16 20:59 upstream 3e7bb4f24617 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/16 08:04 upstream a7a55e27ad72 ec410564 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/10 17:18 upstream 09a9639e56c0 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/04/08 14:07 upstream aa318c48808c 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/02/10 16:45 upstream 38c1e0c65865 e29a17f5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/02/04 11:46 upstream 0136d86b7852 1b2f701a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/02/03 10:53 upstream e7368fd30165 33fc5c09 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
2023/01/29 14:05 upstream c96618275234 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: slab-out-of-bounds Read in ntfs_readdir
* Struck through repros no longer work on HEAD.