syzbot

 sign-in | mailing list | source | docs
🐞 Open [693]
🐞 Fixed [72]
🐞 Invalid [863]
⬇ Missing Backports [109]
≡ Crashes
Kernel Health Bugs/Month Bug Lifetimes Fuzzing
💬 Send us feedback

KASAN: use-after-free Read in reiserfs_release_objectid

Status: upstream: reported C repro on 2024/07/24 14:44
Bug presence: origin:upstream
Labels: missing-backport
[Documentation on labels]
Reported-by: syzbot+171dce919ec4f9ebe19c@syzkaller.appspotmail.com
First crash: 293d, last: 2d08h
Fix bisection: failed (error log, bisect log)
  
▶ ▼ Bug presence (3)
Date Name Commit Repro Result
2025/01/06 linux-5.15.y (ToT) 91786f140358 C [report] KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 upstream (ToT) d7a5aa4b3c00 C [report] KASAN: slab-use-after-free Read in reiserfs_release_objectid
2025/01/06 upstream (ToT) 9d89551994a4 C Didn't crash
▶ ▼ Similar bugs (5)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 KASAN: use-after-free Read in reiserfs_release_objectid C 1 803d 890d 0/1 upstream: reported C repro on 2022/12/04 21:28
linux-6.1 KASAN: use-after-free Read in reiserfs_release_objectid 1 765d 765d 0/3 auto-obsoleted due to no activity on 2023/08/07 07:31
linux-6.1 KASAN: use-after-free Read in reiserfs_release_objectid (2) origin:lts-only C error 50 8d23h 125d 0/3 upstream: reported C repro on 2025/01/08 08:59
upstream KASAN: use-after-free Read in reiserfs_release_objectid reiserfs C error done 6 494d 896d 0/28 auto-obsoleted due to no activity on 2024/05/25 08:15
linux-4.19 KASAN: use-after-free Read in reiserfs_release_objectid reiserfs C error 2 820d 896d 0/1 upstream: reported C repro on 2022/11/28 17:34
▶ ▼ Last patch testing requests (8)
Created Duration User Patch Repo Result
2025/05/01 00:24 15m retest repro linux-5.15.y report log
2025/05/01 00:24 16m retest repro linux-5.15.y report log
2025/05/01 00:24 16m retest repro linux-5.15.y report log
2025/05/01 00:24 15m retest repro linux-5.15.y report log
2025/05/01 00:24 12m retest repro linux-5.15.y report log
2024/12/30 17:26 14m retest repro linux-5.15.y report log
2024/12/30 17:26 12m retest repro linux-5.15.y report log
2024/12/30 17:26 29m retest repro linux-5.15.y report log

Sample crash report:
REISERFS warning (device loop0): vs-13060 reiserfs_update_sd_size: stat data of object [1 2 0x0 UNKNOWN] (nlink == 1) not found (pos 2)
REISERFS warning: green-16003 errcatch_is_left_mergeable: Invalid item type observed, run fsck ASAP
==================================================================
BUG: KASAN: use-after-free in reiserfs_release_objectid+0x454/0x63c fs/reiserfs/objectid.c:165
Read of size 8188 at addr ffff0000e1042050 by task syz-executor745/4040

CPU: 1 PID: 4040 Comm: syz-executor745 Not tainted 5.15.179-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025
Call trace:
 dump_backtrace+0x0/0x530 arch/arm64/kernel/stacktrace.c:152
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:216
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x108/0x170 lib/dump_stack.c:106
 print_address_description+0x7c/0x3f0 mm/kasan/report.c:248
 __kasan_report mm/kasan/report.c:434 [inline]
 kasan_report+0x174/0x1e4 mm/kasan/report.c:451
 kasan_check_range+0x274/0x2b4 mm/kasan/generic.c:189
 memmove+0x90/0xe8 mm/kasan/shadow.c:54
 reiserfs_release_objectid+0x454/0x63c fs/reiserfs/objectid.c:165
 remove_save_link+0x2a0/0x460 fs/reiserfs/super.c:542
 reiserfs_evict_inode+0x304/0x3f0 fs/reiserfs/inode.c:91
 evict+0x418/0x894 fs/inode.c:647
 iput_final fs/inode.c:1769 [inline]
 iput+0x744/0x824 fs/inode.c:1795
 d_delete_notify include/linux/fsnotify.h:267 [inline]
 vfs_rmdir+0x2f8/0x3f0 fs/namei.c:4162
 do_rmdir+0x2e8/0x84c fs/namei.c:4210
 __do_sys_unlinkat fs/namei.c:4390 [inline]
 __se_sys_unlinkat fs/namei.c:4384 [inline]
 __arm64_sys_unlinkat+0xe0/0xfc fs/namei.c:4384
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x58/0x14c arch/arm64/kernel/syscall.c:181
 el0_svc+0x7c/0x1f0 arch/arm64/kernel/entry-common.c:608
 el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:626
 el0t_64_sync+0x1a0/0x1a4 arch/arm64/kernel/entry.S:584

The buggy address belongs to the page:
page:00000000ae16e1bf refcount:3 mapcount:0 mapping:0000000064874798 index:0x10 pfn:0x121042
memcg:ffff0000c08a4000
aops:def_blk_aops ino:700000
flags: 0x5ffc00000022026(referenced|uptodate|active|private|mappedtodisk|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000022026 0000000000000000 dead000000000122 ffff0000c5324f48
raw: 0000000000000010 ffff0000de756740 00000003ffffffff ffff0000c08a4000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e1042f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e1042f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e1043000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff0000e1043080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff0000e1043100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================

Crashes (79):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2025/03/21 16:11 linux-5.15.y 0c935c049b5c 62330552 .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro (corrupt fs)] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 06:12 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report syz / log C [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 15:37 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 07:31 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 04:18 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 03:00 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 01:05 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report syz / log [disk image] [vmlinux] [kernel image] [mounted in repro] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/05/11 07:18 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/03 14:37 linux-5.15.y 0c935c049b5c 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in reiserfs_release_objectid
2025/03/04 05:12 linux-5.15.y c16c81c81336 c3901742 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan KASAN: use-after-free Read in reiserfs_release_objectid
2025/05/10 21:33 linux-5.15.y 3b8db0e4f263 77908e5f .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/05/04 16:07 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/05/04 05:36 linux-5.15.y 16fdf2c7111b b0714e37 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/16 18:10 linux-5.15.y f7347f400572 a95239b1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/09 03:01 linux-5.15.y 0c935c049b5c a775275d .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/05 22:00 linux-5.15.y 0c935c049b5c 1c65791e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/05 06:48 linux-5.15.y 0c935c049b5c c53ea9c9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/03 20:21 linux-5.15.y 0c935c049b5c d7ae3a11 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/03 07:49 linux-5.15.y 0c935c049b5c 996a9618 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/02 20:44 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/04/02 20:29 linux-5.15.y 0c935c049b5c c799dfdd .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/03/21 15:36 linux-5.15.y 0c935c049b5c 62330552 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/03/15 13:54 linux-5.15.y 0c935c049b5c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/03/15 13:51 linux-5.15.y 0c935c049b5c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/02/28 09:13 linux-5.15.y c16c81c81336 6a8fcbc4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/02/15 21:02 linux-5.15.y c16c81c81336 40a34ec9 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/02/12 04:16 linux-5.15.y c16c81c81336 f2baddf5 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/01/28 05:38 linux-5.15.y 003148680b79 18070896 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/01/28 05:36 linux-5.15.y 003148680b79 18070896 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/01/09 02:52 linux-5.15.y 91786f140358 f3558dbf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/16 14:28 linux-5.15.y 963e654022cc eec85da6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/15 00:05 linux-5.15.y 963e654022cc 7cbfbb3a .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/12 20:18 linux-5.15.y 0a51d2d4527b 530e80f8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/12 05:58 linux-5.15.y 0a51d2d4527b 6f1b0fa8 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/10 05:11 linux-5.15.y 0a51d2d4527b cfc402b4 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 15:27 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 15:26 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 15:23 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 15:21 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 15:18 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:58 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:47 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:39 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:36 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:28 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:24 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:22 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/12/08 14:19 linux-5.15.y 0a51d2d4527b 9ac0fdc6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 03:30 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 03:27 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 02:55 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/16 01:47 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/08/15 23:44 linux-5.15.y 7e89efd3ae1c e4bacdaf .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2024/07/24 14:43 linux-5.15.y 7c6d66f0266f 57b2edb1 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: use-after-free Read in reiserfs_release_objectid
2025/03/15 13:54 linux-5.15.y 0c935c049b5c e2826670 .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 KASAN: slab-out-of-bounds Read in reiserfs_release_objectid
* Struck through repros no longer work on HEAD.