syzbot


BUG: bad usercopy in hidraw_ioctl

Status: closed as dup on 2019/08/21 17:00
Subsystems: hardening mm
[Documentation on labels]
Reported-by: syzbot+3de312463756f656b47d@syzkaller.appspotmail.com
First crash: 1695d, last: 1677d
Duplicate of
Title Repro Cause bisect Fix bisect Count Last Reported
KASAN: slab-out-of-bounds Read in hidraw_ioctl input C 104 1652d 1703d
Duplicate bugs (3)
duplicates (3):
Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
KASAN: out-of-bounds Read in hidraw_ioctl input 3 1648d 1692d 0/26 closed as dup on 2019/08/13 13:44
WARNING: bad usercopy in hidraw_ioctl hardening mm 10 1665d 1680d 0/26 closed as dup on 2019/08/21 23:38
KASAN: user-memory-access Read in hidraw_ioctl input 10 1656d 1703d 0/26 closed as dup on 2019/08/13 13:43
Discussions (1)
Title Replies (including bot) Last reply
BUG: bad usercopy in hidraw_ioctl 5 (6) 2019/08/21 17:00

Sample crash report:
usercopy: Kernel memory exposure attempt detected from wrapped address (offset 0, size 3741)!
------------[ cut here ]------------
kernel BUG at mm/usercopy.c:98!
invalid opcode: 0000 [#1] SMP KASAN
CPU: 1 PID: 2729 Comm: syz-executor.1 Not tainted 5.3.0-rc5+ #28
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:usercopy_abort+0xb9/0xbb mm/usercopy.c:98
Code: e8 42 f4 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 20 f6 cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 86 95 c1 ff <0f> 0b e8 16 f4 d6 ff e8 b1 98 fd ff 8b 54 24 04 49 89 d8 4c 89 e1
RSP: 0018:ffff8881d0747be8 EFLAGS: 00010282
RAX: 000000000000005d RBX: ffffffff85cdf340 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81288cfd RDI: ffffed103a0e8f6f
RBP: ffffffff85cdf500 R08: 000000000000005d R09: ffffed103b665d58
R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffffffff85cdf6a0
R13: ffffffff85cdf340 R14: 0000000000000e9d R15: ffffffff85cdf340
FS:  00007f06f36d1700(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcb3966fec CR3: 00000001c6684000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 check_bogus_address mm/usercopy.c:151 [inline]
 __check_object_size mm/usercopy.c:260 [inline]
 __check_object_size.cold+0xb2/0xbb mm/usercopy.c:250
 check_object_size include/linux/thread_info.h:119 [inline]
 check_copy_size include/linux/thread_info.h:150 [inline]
 copy_to_user include/linux/uaccess.h:151 [inline]
 hidraw_ioctl+0x38c/0xae0 drivers/hid/hidraw.c:392
 vfs_ioctl fs/ioctl.c:46 [inline]
 file_ioctl fs/ioctl.c:509 [inline]
 do_vfs_ioctl+0xd2d/0x1330 fs/ioctl.c:696
 ksys_ioctl+0x9b/0xc0 fs/ioctl.c:713
 __do_sys_ioctl fs/ioctl.c:720 [inline]
 __se_sys_ioctl fs/ioctl.c:718 [inline]
 __x64_sys_ioctl+0x6f/0xb0 fs/ioctl.c:718
 do_syscall_64+0xb7/0x580 arch/x86/entry/common.c:296
 entry_SYSCALL_64_after_hwframe+0x49/0xbe
RIP: 0033:0x459879
Code: fd b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 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 0f 83 cb b7 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f06f36d0c78 EFLAGS: 00000246 ORIG_RAX: 0000000000000010
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000459879
RDX: 0000000020001c00 RSI: 0000000090044802 RDI: 0000000000000004
RBP: 000000000075bf20 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f06f36d16d4
R13: 00000000004c2253 R14: 00000000004d56f8 R15: 00000000ffffffff
Modules linked in:
---[ end trace e4ef8731efe5bb74 ]---
RIP: 0010:usercopy_abort+0xb9/0xbb mm/usercopy.c:98
Code: e8 42 f4 d6 ff 49 89 d9 4d 89 e8 4c 89 e1 41 56 48 89 ee 48 c7 c7 20 f6 cd 85 ff 74 24 08 41 57 48 8b 54 24 20 e8 86 95 c1 ff <0f> 0b e8 16 f4 d6 ff e8 b1 98 fd ff 8b 54 24 04 49 89 d8 4c 89 e1
RSP: 0018:ffff8881d0747be8 EFLAGS: 00010282
RAX: 000000000000005d RBX: ffffffff85cdf340 RCX: 0000000000000000
RDX: 0000000000000000 RSI: ffffffff81288cfd RDI: ffffed103a0e8f6f
RBP: ffffffff85cdf500 R08: 000000000000005d R09: ffffed103b665d58
R10: ffffed103b665d57 R11: ffff8881db32eabf R12: ffffffff85cdf6a0
R13: ffffffff85cdf340 R14: 0000000000000e9d R15: ffffffff85cdf340
FS:  00007f06f36d1700(0000) GS:ffff8881db300000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffcb3966fec CR3: 00000001c6684000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (5):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2019/08/24 22:43 https://github.com/google/kasan.git usb-fuzzer eea39f24f4a5 d21c5d9d .config console log report ci2-upstream-usb
2019/08/14 10:33 https://github.com/google/kasan.git usb-fuzzer d0847550e22d ef801a3e .config console log report ci2-upstream-usb
2019/08/10 09:43 https://github.com/google/kasan.git usb-fuzzer e96407b49762 acb51638 .config console log report ci2-upstream-usb
2019/08/09 01:47 https://github.com/google/kasan.git usb-fuzzer e96407b49762 ede31a9b .config console log report ci2-upstream-usb
2019/08/07 14:02 https://github.com/google/kasan.git usb-fuzzer e96407b49762 cdde7486 .config console log report ci2-upstream-usb
* Struck through repros no longer work on HEAD.