KASAN: slab-out-of-bounds Read in hfsplus_uni2asc
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syzbot
Nov 27, 2022, 3:50:39 AM11/27/22
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1087a58d880000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=87b25e2d5dfd40d5fada
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167f0dc3880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118b5d3d880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0fab32eae5df/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+87b25e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x910/0xa00 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff8880b0f1cccc by task syz-executor367/8101
CPU: 1 PID: 8101 Comm: syz-executor367 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load2_noabort+0x88/0x90 mm/kasan/report.c:431
hfsplus_uni2asc+0x910/0xa00 fs/hfsplus/unicode.c:179
hfsplus_readdir+0x82c/0xf20 fs/hfsplus/dir.c:207
iterate_dir+0x473/0x5c0 fs/readdir.c:51
ksys_getdents64+0x175/0x2b0 fs/readdir.c:357
__do_sys_getdents64 fs/readdir.c:376 [inline]
__se_sys_getdents64 fs/readdir.c:373 [inline]
__x64_sys_getdents64+0x6f/0xb0 fs/readdir.c:373
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fa922d4c879
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:00007ffce2835048 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000000000000003f RCX: 00007fa922d4c879
RDX: 0000000000000061 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 00007fa922d0c110 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa922d0c1a0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 8101:
__do_kmalloc mm/slab.c:3727 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
hfsplus_find_init+0x91/0x220 fs/hfsplus/bfind.c:21
hfsplus_readdir+0x21b/0xf20 fs/hfsplus/dir.c:144
iterate_dir+0x473/0x5c0 fs/readdir.c:51
ksys_getdents64+0x175/0x2b0 fs/readdir.c:357
__do_sys_getdents64 fs/readdir.c:376 [inline]
__se_sys_getdents64 fs/readdir.c:373 [inline]
__x64_sys_getdents64+0x6f/0xb0 fs/readdir.c:373
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 0:
(stack is not available)
The buggy address belongs to the object at ffff8880b0f1c8c0
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1036 bytes inside of
2048-byte region [ffff8880b0f1c8c0, ffff8880b0f1d0c0)
The buggy address belongs to the page:
page:ffffea0002c3c700 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002c1ba08 ffff88813bff1948 ffff88813bff0c40
raw: 0000000000000000 ffff8880b0f1c040 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880b0f1cb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8880b0f1cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880b0f1cc80: 00 00 00 00 00 00 00 00 00 04 fc fc fc fc fc fc
^
ffff8880b0f1cd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880b0f1cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot found the following issue on:
HEAD commit: 3f8a27f9e27b Linux 4.19.211
git tree: linux-4.19.y
console output: https://syzkaller.appspot.com/x/log.txt?x=1087a58d880000
kernel config: https://syzkaller.appspot.com/x/.config?x=9b9277b418617afe
dashboard link: https://syzkaller.appspot.com/bug?extid=87b25e2d5dfd40d5fada
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=167f0dc3880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=118b5d3d880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/98c0bdb4abb3/disk-3f8a27f9.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/ea228ff02669/vmlinux-3f8a27f9.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/0fab32eae5df/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+87b25e...@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x910/0xa00 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff8880b0f1cccc by task syz-executor367/8101
CPU: 1 PID: 8101 Comm: syz-executor367 Not tainted 4.19.211-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1fc/0x2ef lib/dump_stack.c:118
print_address_description.cold+0x54/0x219 mm/kasan/report.c:256
kasan_report_error.cold+0x8a/0x1b9 mm/kasan/report.c:354
kasan_report mm/kasan/report.c:412 [inline]
__asan_report_load2_noabort+0x88/0x90 mm/kasan/report.c:431
hfsplus_uni2asc+0x910/0xa00 fs/hfsplus/unicode.c:179
hfsplus_readdir+0x82c/0xf20 fs/hfsplus/dir.c:207
iterate_dir+0x473/0x5c0 fs/readdir.c:51
ksys_getdents64+0x175/0x2b0 fs/readdir.c:357
__do_sys_getdents64 fs/readdir.c:376 [inline]
__se_sys_getdents64 fs/readdir.c:373 [inline]
__x64_sys_getdents64+0x6f/0xb0 fs/readdir.c:373
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x7fa922d4c879
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:00007ffce2835048 EFLAGS: 00000246 ORIG_RAX: 00000000000000d9
RAX: ffffffffffffffda RBX: 000000000000003f RCX: 00007fa922d4c879
RDX: 0000000000000061 RSI: 0000000020000340 RDI: 0000000000000004
RBP: 00007fa922d0c110 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007fa922d0c1a0
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
Allocated by task 8101:
__do_kmalloc mm/slab.c:3727 [inline]
__kmalloc+0x15a/0x3c0 mm/slab.c:3736
kmalloc include/linux/slab.h:520 [inline]
hfsplus_find_init+0x91/0x220 fs/hfsplus/bfind.c:21
hfsplus_readdir+0x21b/0xf20 fs/hfsplus/dir.c:144
iterate_dir+0x473/0x5c0 fs/readdir.c:51
ksys_getdents64+0x175/0x2b0 fs/readdir.c:357
__do_sys_getdents64 fs/readdir.c:376 [inline]
__se_sys_getdents64 fs/readdir.c:373 [inline]
__x64_sys_getdents64+0x6f/0xb0 fs/readdir.c:373
do_syscall_64+0xf9/0x620 arch/x86/entry/common.c:293
entry_SYSCALL_64_after_hwframe+0x49/0xbe
Freed by task 0:
(stack is not available)
The buggy address belongs to the object at ffff8880b0f1c8c0
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1036 bytes inside of
2048-byte region [ffff8880b0f1c8c0, ffff8880b0f1d0c0)
The buggy address belongs to the page:
page:ffffea0002c3c700 count:1 mapcount:0 mapping:ffff88813bff0c40 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffffea0002c1ba08 ffff88813bff1948 ffff88813bff0c40
raw: 0000000000000000 ffff8880b0f1c040 0000000100000003 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880b0f1cb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
ffff8880b0f1cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880b0f1cc80: 00 00 00 00 00 00 00 00 00 04 fc fc fc fc fc fc
^
ffff8880b0f1cd00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880b0f1cd80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
---
This report is generated by a bot. It may contain errors.
See https://goo.gl/tpsmEJ for more information about syzbot.
syzbot engineers can be reached at syzk...@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
syzbot
Dec 3, 2022, 10:32:36 PM12/3/22
to syzkaller...@googlegroups.com
Hello,
syzbot found the following issue on:
HEAD commit: 179ef7fe8677 Linux 4.14.300
syzbot found the following issue on:
git tree: linux-4.14.y
console output: https://syzkaller.appspot.com/x/log.txt?x=122527bd880000
kernel config: https://syzkaller.appspot.com/x/.config?x=aa85f51ec321d5a9
dashboard link: https://syzkaller.appspot.com/bug?extid=46f069303109f2aac73b
compiler: gcc version 10.2.1 20210110 (Debian 10.2.1-6)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12579e1d880000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=17611af3880000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/d311ef57b59a/disk-179ef7fe.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/25bf5d729f69/vmlinux-179ef7fe.xz
kernel image: https://storage.googleapis.com/syzbot-assets/db9b96571e69/bzImage-179ef7fe.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/f626a2dfe88d/mount_0.gz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
==================================================================
BUG: KASAN: slab-out-of-bounds in hfsplus_uni2asc+0x82a/0x910 fs/hfsplus/unicode.c:179
Read of size 2 at addr ffff8880b323b9cc by task syz-executor841/7983
CPU: 1 PID: 7983 Comm: syz-executor841 Not tainted 4.14.300-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022
Call Trace:
__dump_stack lib/dump_stack.c:17 [inline]
Call Trace:
dump_stack+0x1b2/0x281 lib/dump_stack.c:58
print_address_description.cold+0x54/0x1d3 mm/kasan/report.c:252
kasan_report_error.cold+0x8a/0x191 mm/kasan/report.c:351
kasan_report mm/kasan/report.c:409 [inline]
__asan_report_load2_noabort+0x68/0x70 mm/kasan/report.c:428
hfsplus_uni2asc+0x82a/0x910 fs/hfsplus/unicode.c:179
hfsplus_readdir+0x6e4/0xd70 fs/hfsplus/dir.c:209
iterate_dir+0x1a0/0x5e0 fs/readdir.c:52
SYSC_getdents64 fs/readdir.c:358 [inline]
SyS_getdents64+0x125/0x230 fs/readdir.c:339
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
Allocated by task 7983:
save_stack mm/kasan/kasan.c:447 [inline]
set_track mm/kasan/kasan.c:459 [inline]
kasan_kmalloc+0xeb/0x160 mm/kasan/kasan.c:551
__do_kmalloc mm/slab.c:3720 [inline]
__kmalloc+0x15a/0x400 mm/slab.c:3729
kmalloc include/linux/slab.h:493 [inline]
hfsplus_find_init+0x91/0x220 fs/hfsplus/bfind.c:21
hfsplus_readdir+0x1dc/0xd70 fs/hfsplus/dir.c:146
iterate_dir+0x1a0/0x5e0 fs/readdir.c:52
SYSC_getdents64 fs/readdir.c:358 [inline]
SyS_getdents64+0x125/0x230 fs/readdir.c:339
do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
entry_SYSCALL_64_after_hwframe+0x5e/0xd3
Freed by task 0:
(stack is not available)
which belongs to the cache kmalloc-2048 of size 2048
The buggy address is located 1036 bytes inside of
2048-byte region [ffff8880b323b5c0, ffff8880b323bdc0)
The buggy address is located 1036 bytes inside of
The buggy address belongs to the page:
page:ffffea0002cc8e80 count:1 mapcount:0 mapping:ffff8880b323a4c0 index:0x0 compound_mapcount: 0
flags: 0xfff00000008100(slab|head)
raw: 00fff00000008100 ffff8880b323a4c0 0000000000000000 0000000100000003
raw: ffffea0002cd9420 ffff88813fe64948 ffff88813fe74c40 0000000000000000
page dumped because: kasan: bad access detected
Memory state around the buggy address:
ffff8880b323b880: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
Memory state around the buggy address:
ffff8880b323b900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8880b323b980: 00 00 00 00 00 00 00 00 00 04 fc fc fc fc fc fc
^
ffff8880b323ba00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
ffff8880b323ba80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
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