syzbot


KASAN: use-after-free Read in search_by_entry_key (2)

Status: upstream: reported C repro on 2022/06/12 10:38
Labels: reiserfs (incorrect?)
Reported-by: syzbot+ffe24b1afbc4cb5ae8fb@syzkaller.appspotmail.com
First crash: 352d, last: 1d17h

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: KASAN: use-after-free Read in search_by_entry_key (log)
Repro: C syz .config

Fix bisection: the fix commit could be any of (bisect log):
  1c27f1fc1549 iov_iter: fix build issue due to possible type mis-match
  3cc40a443a04 Merge tag 'nios2_fixes_v6.0' of git://git.kernel.org/pub/scm/linux/kernel/git/dinguyen/linux
Discussions (3)
Title Replies (including bot) Last reply
[PATCH v2] reiserfs: add check in bin_search_in_dir_item() 1 (1) 2022/08/17 16:10
[PATCH] reiserfs: add check in search_by_entry_key() 1 (1) 2022/08/17 08:55
[syzbot] KASAN: use-after-free Read in search_by_entry_key (2) 0 (1) 2022/06/12 10:38
Similar bugs (8)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-4.14 KASAN: use-after-free Read in search_by_entry_key (2) reiserfs C error 6 154d 774d 0/1 upstream: reported C repro on 2021/04/16 06:17
linux-4.14 KASAN: use-after-free Read in search_by_entry_key C done 3 874d 980d 1/1 fixed on 2021/02/21 17:18
linux-4.19 KASAN: use-after-free Read in search_by_entry_key (3) reiserfs C error 8 153d 347d 0/1 upstream: reported C repro on 2022/06/17 02:59
linux-4.19 KASAN: use-after-free Read in search_by_entry_key C done 1 875d 965d 1/1 fixed on 2021/02/20 09:47
linux-5.15 KASAN: use-after-free Read in search_by_entry_key origin:upstream C 5 15d 51d 0/3 upstream: reported C repro on 2023/04/08 09:36
linux-6.1 KASAN: use-after-free Read in search_by_entry_key origin:upstream C 5 8d00h 36d 0/3 upstream: reported C repro on 2023/04/23 10:15
upstream KASAN: use-after-free Read in search_by_entry_key reiserfs C done 3 960d 963d 21/24 fixed on 2021/03/10 01:49
linux-4.19 KASAN: use-after-free Read in search_by_entry_key (2) C done 2 656d 806d 1/1 fixed on 2021/09/10 21:17
Last patch testing requests (1)
Created Duration User Patch Repo Result
2022/08/17 07:37 15m yin31149@gmail.com patch https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 1c27f1fc1549f0e470429f5497a76ad28a37f21a report log

Sample crash report:
REISERFS warning:  read_super_block: reiserfs filesystem is deprecated and scheduled to be removed from the kernel in 2025
REISERFS (device loop0): found reiserfs format "3.5" with non-standard journal
REISERFS (device loop0): using ordered data mode
reiserfs: using flush barriers
REISERFS (device loop0): journal params: device loop0, size 512, journal first block 18, max trans len 256, max batch 225, max commit age 30, max trans age 30
REISERFS (device loop0): checking transaction log (loop0)
REISERFS (device loop0): Using r5 hash to sort names
==================================================================
BUG: KASAN: use-after-free in bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline]
BUG: KASAN: use-after-free in search_by_entry_key+0x823/0x960 fs/reiserfs/namei.c:165
Read of size 4 at addr ffff888073ef3004 by task syz-executor471/5001

CPU: 0 PID: 5001 Comm: syz-executor471 Not tainted 6.4.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd9/0x150 lib/dump_stack.c:106
 print_address_description.constprop.0+0x2c/0x3c0 mm/kasan/report.c:351
 print_report mm/kasan/report.c:462 [inline]
 kasan_report+0x11c/0x130 mm/kasan/report.c:572
 bin_search_in_dir_item fs/reiserfs/namei.c:40 [inline]
 search_by_entry_key+0x823/0x960 fs/reiserfs/namei.c:165
 reiserfs_find_entry.part.0+0x139/0xdf0 fs/reiserfs/namei.c:322
 reiserfs_find_entry fs/reiserfs/namei.c:368 [inline]
 reiserfs_lookup+0x24e/0x610 fs/reiserfs/namei.c:368
 __lookup_slow+0x24c/0x460 fs/namei.c:1690
 lookup_one_len+0x16e/0x1a0 fs/namei.c:2742
 reiserfs_lookup_privroot+0x96/0x210 fs/reiserfs/xattr.c:976
 reiserfs_fill_super+0x1a8d/0x2eb0 fs/reiserfs/super.c:2192
 mount_bdev+0x357/0x420 fs/super.c:1380
 legacy_get_tree+0x109/0x220 fs/fs_context.c:610
 vfs_get_tree+0x8d/0x350 fs/super.c:1510
 do_new_mount fs/namespace.c:3039 [inline]
 path_mount+0x134b/0x1e40 fs/namespace.c:3369
 do_mount fs/namespace.c:3382 [inline]
 __do_sys_mount fs/namespace.c:3591 [inline]
 __se_sys_mount fs/namespace.c:3568 [inline]
 __x64_sys_mount+0x283/0x300 fs/namespace.c:3568
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7f3c5049ad2a
Code: 48 c7 c2 b8 ff ff ff f7 d8 64 89 02 b8 ff ff ff ff eb d2 e8 f8 03 00 00 0f 1f 84 00 00 00 00 00 49 89 ca b8 a5 00 00 00 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:00007ffde73026a8 EFLAGS: 00000286 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 00007f3c5049ad2a
RDX: 0000000020000140 RSI: 0000000020000340 RDI: 00007ffde73026b0
RBP: 00007ffde73026b0 R08: 00007ffde73026f0 R09: 000000000000111a
R10: 000000000120c083 R11: 0000000000000286 R12: 0000000000000004
R13: 0000555555b802b8 R14: 00007ffde73026f0 R15: 0000000000000000
 </TASK>

The buggy address belongs to the physical page:
page:ffffea0001cfbcc0 refcount:0 mapcount:0 mapping:0000000000000000 index:0x1 pfn:0x73ef3
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 ffffea0001cfbd08 ffff8880b9843660 0000000000000000
raw: 0000000000000001 0000000000000000 00000000ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as freed
page last allocated via order 0, migratetype Movable, gfp_mask 0x140dca(GFP_HIGHUSER_MOVABLE|__GFP_COMP|__GFP_ZERO), pid 4967, tgid 4967 (sshd), ts 37292231688, free_ts 37344330974
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x2db/0x350 mm/page_alloc.c:1731
 prep_new_page mm/page_alloc.c:1738 [inline]
 get_page_from_freelist+0xf41/0x2c00 mm/page_alloc.c:3502
 __alloc_pages+0x1cb/0x4a0 mm/page_alloc.c:4768
 __folio_alloc+0x16/0x40 mm/page_alloc.c:4800
 vma_alloc_folio+0x155/0x890 mm/mempolicy.c:2240
 do_anonymous_page mm/memory.c:4085 [inline]
 do_pte_missing mm/memory.c:3645 [inline]
 handle_pte_fault mm/memory.c:4947 [inline]
 __handle_mm_fault+0x224c/0x41c0 mm/memory.c:5089
 handle_mm_fault+0x2af/0x9f0 mm/memory.c:5243
 do_user_addr_fault+0x2ca/0x1210 arch/x86/mm/fault.c:1349
 handle_page_fault arch/x86/mm/fault.c:1534 [inline]
 exc_page_fault+0x98/0x170 arch/x86/mm/fault.c:1590
 asm_exc_page_fault+0x26/0x30 arch/x86/include/asm/idtentry.h:570
page last free stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1302 [inline]
 free_unref_page_prepare+0x62e/0xcb0 mm/page_alloc.c:2564
 free_unref_page_list+0xe3/0xa70 mm/page_alloc.c:2705
 release_pages+0xcd8/0x1380 mm/swap.c:1042
 tlb_batch_pages_flush+0xa8/0x1a0 mm/mmu_gather.c:97
 tlb_flush_mmu_free mm/mmu_gather.c:292 [inline]
 tlb_flush_mmu mm/mmu_gather.c:299 [inline]
 tlb_finish_mmu+0x14b/0x7e0 mm/mmu_gather.c:391
 unmap_region+0x23d/0x2d0 mm/mmap.c:2222
 do_vmi_align_munmap+0xe26/0x1580 mm/mmap.c:2473
 do_vmi_munmap+0x26e/0x2c0 mm/mmap.c:2530
 __vm_munmap+0x133/0x3b0 mm/mmap.c:2805
 __do_sys_munmap mm/mmap.c:2830 [inline]
 __se_sys_munmap mm/mmap.c:2827 [inline]
 __x64_sys_munmap+0x62/0x80 mm/mmap.c:2827
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x39/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x63/0xcd

Memory state around the buggy address:
 ffff888073ef2f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff888073ef2f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff888073ef3000: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
                   ^
 ffff888073ef3080: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
 ffff888073ef3100: ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff
==================================================================

Crashes (59):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets Manager Title
2023/05/08 20:41 upstream ac9a78681b92 90c93c40 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/01/24 17:33 upstream 7bf70dbb1882 9dfcf09c .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2022/11/07 05:30 upstream 089d1c31224e 6d752409 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2022/10/25 19:58 upstream a970174d7a10 45645420 .config strace log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2022/10/15 06:57 upstream 493ffd6605b2 67cb024c .config console log report syz C [disk image] [vmlinux] [mounted in repro] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/09/21 02:45 upstream 60891ec99e14 c4b8ccfd .config strace log report syz C [disk image] [vmlinux] ci-upstream-kasan-gce-smack-root KASAN: use-after-free Read in search_by_entry_key
2022/06/12 07:40 upstream 1c27f1fc1549 0d5abf15 .config console log report syz C ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2022/09/04 18:35 linux-next e47eb90a0a9a 28811d0a .config strace log report syz C ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/05/08 21:00 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 90c93c40 .config console log report syz C [disk image] [vmlinux] [kernel image] [mounted in repro] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/05/25 13:40 upstream 933174ae28ba 0513b3e6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/05/21 14:23 upstream 0dd2a6fb1e34 4bce1a3e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/05/14 09:15 upstream d4d58949a6ea 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/05/13 21:07 upstream 9a48d6046722 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/05/12 21:16 upstream cc3c44c9fda2 ecca8a24 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/05/08 19:37 upstream ac9a78681b92 90c93c40 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/05/02 04:02 upstream c8c655c34e33 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/05/02 02:35 upstream c8c655c34e33 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/05/01 01:47 upstream 58390c8ce1bd 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/04/28 14:32 upstream 91ec4b0d11fe 70a605de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/04/28 08:50 upstream 91ec4b0d11fe 70a605de .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/04/27 07:43 upstream 5c7ecada25d2 19a3dabe .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/04/24 08:11 upstream 457391b03803 2b32bd34 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/04/11 18:54 upstream 0d3eb744aed4 49faf98d .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/04/10 18:12 upstream 09a9639e56c0 71147e29 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/03/28 23:37 upstream fcd476ea6a88 fc067f05 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/03/22 08:55 upstream 2faac9a98f01 8b4eb097 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/03/19 05:53 upstream 534293368afa 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/03/15 07:32 upstream 4979bf866825 0d5c4377 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/03/05 08:21 upstream b01fe98d34f3 f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/03/04 01:56 upstream 0a3f9a6b0265 f8902b57 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/02/26 21:09 upstream 2fcd07b7ccd5 ee50e71c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/02/07 01:24 upstream d2d11f342b17 0a9c11b6 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/02/01 22:43 upstream c0b67534c95c 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/02/01 16:15 upstream c0b67534c95c 9a6f477c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/01/27 11:46 upstream 7c46948a6e9c 9dfcf09c .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/01/16 08:53 upstream 5dc4c995db9e a63719e7 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-kasan-gce-selinux-root KASAN: use-after-free Read in search_by_entry_key
2023/01/10 17:28 upstream 5a41237ad1d4 48bc529a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/01/08 19:32 upstream 9b43a525db12 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2023/01/05 14:21 upstream 512dee0c00ad 1dac8c7a .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/12/21 03:37 upstream 6feb57c2fd7c d3e76707 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/12/14 07:24 upstream 02bf43c7b7f7 f6511626 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/11/21 21:17 upstream eb7081409f94 1c576c23 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/11/20 12:26 upstream fe24a97cf254 5bb70014 .config console log report info [disk image] [vmlinux] [kernel image] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/10/16 16:25 upstream 493ffd6605b2 67cb024c .config console log report info [disk image] [vmlinux] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/10/08 16:15 upstream 62e6e5940c0c aea5da89 .config console log report info [disk image] [vmlinux] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/10/06 23:53 upstream 833477fce7a1 80b58a42 .config console log report info [disk image] [vmlinux] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/10/02 19:42 upstream b357fd1c2afc feb56351 .config console log report info [disk image] [vmlinux] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/10/02 09:16 upstream b357fd1c2afc feb56351 .config console log report info [disk image] [vmlinux] ci2-upstream-fs KASAN: use-after-free Read in search_by_entry_key
2022/06/12 07:02 upstream 1c27f1fc1549 0d5abf15 .config console log report info ci-upstream-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/04/16 04:42 upstream a7a55e27ad72 ec410564 .config console log report info ci-qemu-upstream-386 KASAN: use-after-free Read in search_by_entry_key
2023/02/12 01:02 linux-next 38d2b86a665b 93e26d60 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2022/12/28 17:35 linux-next c76083fac3ba 44712fbc .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-linux-next-kasan-gce-root KASAN: use-after-free Read in search_by_entry_key
2023/05/28 13:54 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci eb0f1697d729 cf184559 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/05/16 12:49 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1fcbaa18b28 11c89444 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/05/16 02:45 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1fcbaa18b28 71b00cfb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/05/16 00:02 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci f1fcbaa18b28 71b00cfb .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/05/14 20:33 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 2b9ba477 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/05/01 03:18 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci 14f8db1c0f9a 62df2017 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
2023/03/11 14:30 git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci fe15c26ee26e 5205ef30 .config console log report info [disk image] [vmlinux] [kernel image] ci-upstream-gce-arm64 KASAN: use-after-free Read in search_by_entry_key
* Struck through repros no longer work on HEAD.