Hello,
syzbot found the following issue on:
HEAD commit: bbf9f29bac04 Linux 5.15.101
git tree: linux-5.15.y
console output:
https://syzkaller.appspot.com/x/log.txt?x=1698f12ac80000
kernel config:
https://syzkaller.appspot.com/x/.config?x=353a11a1dbfe7820
dashboard link:
https://syzkaller.appspot.com/bug?extid=137c25e094e0ed6a2ce6
compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2
userspace arch: arm64
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image:
https://storage.googleapis.com/syzbot-assets/741458b6f24d/disk-bbf9f29b.raw.xz
vmlinux:
https://storage.googleapis.com/syzbot-assets/46cdc0f15ae5/vmlinux-bbf9f29b.xz
kernel image:
https://storage.googleapis.com/syzbot-assets/15bf795c52fa/Image-bbf9f29b.gz.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by:
syzbot+137c25...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: out-of-bounds in leaf_paste_entries+0x504/0x944 fs/reiserfs/lbalance.c:1377
Read of size 18446744073709551584 at addr ffff0001021effa4 by task syz-executor.2/2220
CPU: 0 PID: 2220 Comm: syz-executor.2 Not tainted 5.15.101-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023
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
leaf_paste_entries+0x504/0x944 fs/reiserfs/lbalance.c:1377
balance_leaf_finish_node_paste_dirent fs/reiserfs/do_balan.c:1295 [inline]
balance_leaf_finish_node_paste fs/reiserfs/do_balan.c:1321 [inline]
balance_leaf_finish_node fs/reiserfs/do_balan.c:1364 [inline]
balance_leaf+0xa0d4/0xe860 fs/reiserfs/do_balan.c:1452
do_balance+0x27c/0x790 fs/reiserfs/do_balan.c:1888
reiserfs_paste_into_item+0x630/0x744 fs/reiserfs/stree.c:2159
reiserfs_add_entry+0x8c0/0xc8c fs/reiserfs/namei.c:567
reiserfs_mkdir+0x588/0x77c fs/reiserfs/namei.c:862
xattr_mkdir fs/reiserfs/xattr.c:76 [inline]
create_privroot fs/reiserfs/xattr.c:889 [inline]
reiserfs_xattr_init+0x2b0/0x6dc fs/reiserfs/xattr.c:1012
reiserfs_fill_super+0x1b28/0x1e8c fs/reiserfs/super.c:2179
mount_bdev+0x26c/0x368 fs/super.c:1369
get_super_block+0x44/0x58 fs/reiserfs/super.c:2608
legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
vfs_get_tree+0x90/0x274 fs/super.c:1499
do_new_mount+0x25c/0x8c8 fs/namespace.c:2994
path_mount+0x590/0x104c fs/namespace.c:3324
do_mount fs/namespace.c:3337 [inline]
__do_sys_mount fs/namespace.c:3545 [inline]
__se_sys_mount fs/namespace.c:3522 [inline]
__arm64_sys_mount+0x510/0x5e0 fs/namespace.c:3522
__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:596
el0t_64_sync_handler+0x84/0xe4 arch/arm64/kernel/entry-common.c:614
el0t_64_sync+0x1a0/0x1a4 <unknown>:584
The buggy address belongs to the page:
page:00000000dbab7870 refcount:2 mapcount:0 mapping:00000000173f1cd1 index:0x213 pfn:0x1421ef
memcg:ffff0000db1e8000
aops:def_blk_aops ino:700002
flags: 0x5ffc00000002032(referenced|lru|active|private|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000002032 fffffc0004087b88 ffff0000d835e030 ffff0000c50766c8
raw: 0000000000000213 ffff0000d441e488 00000002ffffffff ffff0000db1e8000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff0001021efe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff0001021eff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0001021eff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
^
ffff0001021f0000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff0001021f0080: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
==================================================================
REISERFS warning: reiserfs-5094 has_valid_deh_location: directory entry location seems wrong *3.5*[1768256046 1718773107 0x72705f73 UNKNOWN], item_len 16872, item_location 2, free_space(entry_count) 21376
REISERFS error (device loop2): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS (device loop2): Remounting filesystem read-only
REISERFS error (device loop2): vs-13050 reiserfs_update_sd_size: i/o failure occurred trying to update [1 2 0x0 SD] stat data
REISERFS warning (device loop2): jdm-20006 create_privroot: xattrs/ACLs enabled and couldn't find/create .reiserfs_priv. Failing mount.
REISERFS warning: reiserfs-5094 has_valid_deh_location: directory entry location seems wrong *3.5*[1768256046 1718773107 0x72705f73 UNKNOWN], item_len 16872, item_location 2, free_space(entry_count) 21376
REISERFS error (device loop2): vs-5150 search_by_key: invalid format found in block 531. Fsck?
REISERFS error (device loop2): zam-7001 reiserfs_find_entry: io error
---
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