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

Status: closed as dup on 2019/08/12 12:23
Subsystems: usb
[Documentation on labels]
Reported-by: syzbot+ba00d6a2a24df57a94ca@syzkaller.appspotmail.com
First crash: 1718d, last: 1694d
▶ ▼ Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: use-after-free Read in ld_usb_release usb C 14 1710d 1719d
▶ ▼ Discussions (1)
Title Replies (including bot) Last reply
KASAN: slab-out-of-bounds Read in ld_usb_read 2 (3) 2019/10/18 14:41
▶ ▼ Similar bugs (2)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: slab-out-of-bounds Read in ld_usb_read (2) usb 58 1652d 1681d 0/26 closed as dup on 2019/09/17 12:20
upstream KASAN: slab-out-of-bounds Read in ld_usb_read (3) usb C 74 1640d 1650d 13/26 fixed on 2019/11/06 12:39

Sample crash report:
ldusb 1-1:0.28: Read buffer overflow, -131386046930688 bytes dropped
==================================================================
BUG: KASAN: slab-out-of-bounds in _copy_to_user+0x124/0x150 lib/usercopy.c:27
Read of size 2147479552 at addr ffff8881cd580008 by task syz-executor268/1890

CPU: 0 PID: 1890 Comm: syz-executor268 Not tainted 5.3.0-rc2+ #25
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0xca/0x13e lib/dump_stack.c:113
 print_address_description+0x6a/0x32c mm/kasan/report.c:351
 __kasan_report.cold+0x1a/0x33 mm/kasan/report.c:482
 kasan_report+0xe/0x12 mm/kasan/common.c:612
 check_memory_region_inline mm/kasan/generic.c:185 [inline]
 check_memory_region+0x128/0x190 mm/kasan/generic.c:192
 _copy_to_user+0x124/0x150 lib/usercopy.c:27
 copy_to_user include/linux/uaccess.h:152 [inline]
 ld_usb_read+0x31a/0x780 drivers/usb/misc/ldusb.c:495
 __vfs_read+0x76/0x100 fs/read_write.c:425
 vfs_read+0x1ea/0x430 fs/read_write.c:461
 ksys_read+0x1e8/0x250 fs/read_write.c:587
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x441c49
Code: e8 8c e8 ff ff 48 83 c4 18 c3 0f 1f 80 00 00 00 00 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 0f 83 cb 08 fc ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007ffd920003d8 EFLAGS: 00000246 ORIG_RAX: 0000000000000000
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 0000000000441c49
RDX: 00000000fffffd68 RSI: 0000000020000100 RDI: 0000000000000004
RBP: 00000000000305b5 R08: 000000000000000f R09: 0000000000402a30
R10: 0000000000000000 R11: 0000000000000246 R12: 00000000004029a0
R13: 0000000000402a30 R14: 0000000000000000 R15: 0000000000000000

The buggy address belongs to the page:
page:ffffea0007356000 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 compound_mapcount: 0
flags: 0x200000000010000(head)
raw: 0200000000010000 dead000000000100 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff8881cd595500: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff8881cd595580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff8881cd595600: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
                   ^
 ffff8881cd595680: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
 ffff8881cd595700: fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe fe
==================================================================

Crashes (57):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/10 20:38 https://github.com/google/kasan.git usb-fuzzer e96407b49762 acb51638 .config console log report syz C ci2-upstream-usb
2019/09/03 01:45 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 14544a56 .config console log report ci2-upstream-usb
2019/09/02 20:48 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 14544a56 .config console log report ci2-upstream-usb
2019/09/01 16:43 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/09/01 00:09 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/08/31 15:41 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bad3cce2 .config console log report ci2-upstream-usb
2019/08/31 09:25 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bcd7bcc2 .config console log report ci2-upstream-usb
2019/08/31 04:34 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 bcd7bcc2 .config console log report ci2-upstream-usb
2019/08/30 14:58 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 9adfa876 .config console log report ci2-upstream-usb
2019/08/30 06:48 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/30 03:16 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/29 17:34 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 cd626f3b .config console log report ci2-upstream-usb
2019/08/29 04:52 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 40203c15 .config console log report ci2-upstream-usb
2019/08/28 12:11 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 1eb076e9 .config console log report ci2-upstream-usb
2019/08/28 11:41 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 1eb076e9 .config console log report ci2-upstream-usb
2019/08/28 11:07 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 1eb076e9 .config console log report ci2-upstream-usb
2019/08/28 08:48 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 fd37b39e .config console log report ci2-upstream-usb
2019/08/27 18:36 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/26 18:00 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/26 15:30 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/26 12:26 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/25 00:14 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/24 22:30 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/24 11:06 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report ci2-upstream-usb
2019/08/24 09:45 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report ci2-upstream-usb
2019/08/24 06:25 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 78ded196 .config console log report ci2-upstream-usb
2019/08/23 08:47 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 ca6f3cfa .config console log report ci2-upstream-usb
2019/08/23 04:15 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 ca6f3cfa .config console log report ci2-upstream-usb
2019/08/22 08:44 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 4ea67ff8 .config console log report ci2-upstream-usb
2019/08/22 04:47 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 4ea67ff8 .config console log report ci2-upstream-usb
2019/08/21 15:38 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 4ea67ff8 .config console log report ci2-upstream-usb
2019/08/20 07:10 https://github.com/google/kasan.git usb-fuzzer e06ce4da6fa7 cfc9868f .config console log report ci2-upstream-usb
2019/08/20 06:59 https://github.com/google/kasan.git usb-fuzzer e06ce4da6fa7 cfc9868f .config console log report ci2-upstream-usb
2019/08/20 05:50 https://github.com/google/kasan.git usb-fuzzer e06ce4da6fa7 cfc9868f .config console log report ci2-upstream-usb
2019/08/20 05:08 https://github.com/google/kasan.git usb-fuzzer e06ce4da6fa7 cfc9868f .config console log report ci2-upstream-usb
2019/08/20 04:18 https://github.com/google/kasan.git usb-fuzzer e06ce4da6fa7 ae348fb7 .config console log report ci2-upstream-usb
2019/08/19 18:16 https://github.com/google/kasan.git usb-fuzzer e06ce4da6fa7 ae348fb7 .config console log report ci2-upstream-usb
2019/08/19 02:22 https://github.com/google/kasan.git usb-fuzzer d0847550e22d b8ceabfc .config console log report ci2-upstream-usb
2019/08/18 16:27 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report ci2-upstream-usb
2019/08/17 23:31 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 55bf8926 .config console log report ci2-upstream-usb
2019/08/16 04:19 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8fd428a1 .config console log report ci2-upstream-usb
2019/08/15 22:29 https://github.com/google/kasan.git usb-fuzzer d0847550e22d faeffb00 .config console log report ci2-upstream-usb
2019/08/15 21:01 https://github.com/google/kasan.git usb-fuzzer d0847550e22d faeffb00 .config console log report ci2-upstream-usb
2019/08/15 05:53 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 0d298d6b .config console log report ci2-upstream-usb
2019/08/14 17:16 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 5576551b .config console log report ci2-upstream-usb
2019/08/14 10:07 https://github.com/google/kasan.git usb-fuzzer d0847550e22d ef801a3e .config console log report ci2-upstream-usb
2019/08/14 01:05 https://github.com/google/kasan.git usb-fuzzer d0847550e22d ef801a3e .config console log report ci2-upstream-usb
2019/08/13 09:43 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8620c2c2 .config console log report ci2-upstream-usb
2019/08/13 08:43 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8620c2c2 .config console log report ci2-upstream-usb
2019/08/13 02:18 https://github.com/google/kasan.git usb-fuzzer d0847550e22d 8620c2c2 .config console log report ci2-upstream-usb
2019/08/11 03:52 https://github.com/google/kasan.git usb-fuzzer e96407b49762 acb51638 .config console log report ci2-upstream-usb
2019/08/10 20:00 https://github.com/google/kasan.git usb-fuzzer e96407b49762 acb51638 .config console log report ci2-upstream-usb
2019/08/10 17:55 https://github.com/google/kasan.git usb-fuzzer e96407b49762 acb51638 .config console log report ci2-upstream-usb
* Struck through repros no longer work on HEAD.