syzbot


KASAN: stack-out-of-bounds Read in rb_erase (2)

Status: closed as invalid on 2018/07/07 07:02
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+8613d1d74f171d99324f@syzkaller.appspotmail.com
First crash: 2091d, last: 2091d
Similar bugs (3)
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream KASAN: stack-out-of-bounds Read in rb_erase (4) kernel 1 1900d 1900d 11/26 fixed on 2019/02/17 14:17
upstream KASAN: stack-out-of-bounds Read in rb_erase kernel 1 2092d 2092d 0/26 closed as invalid on 2018/07/06 08:08
upstream KASAN: stack-out-of-bounds Read in rb_erase (3) kernel C 2 2087d 2091d 0/26 closed as dup on 2018/07/07 16:47

Sample crash report:
==================================================================
BUG: KASAN: stack-out-of-bounds in __rb_change_child include/linux/rbtree_augmented.h:139 [inline]
BUG: KASAN: stack-out-of-bounds in __rb_erase_augmented include/linux/rbtree_augmented.h:186 [inline]
BUG: KASAN: stack-out-of-bounds in rb_erase+0x34bf/0x3550 lib/rbtree.c:459
Read of size 8 at addr ffff88019cf37728 by task syz-executor5/21751
PANIC: double fault, error_code: 0x0

CPU: 1 PID: 21807 Comm: syz-executor3 Not tainted 4.18.0-rc3+ #47
CPU: 0 PID: 21751 Comm: syz-executor5 Not tainted 4.18.0-rc3+ #47
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:__lock_acquire+0x2e/0x5020 kernel/locking/lockdep.c:3294
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Code: 
Call Trace:
41 
 <IRQ>
57 41 
 __dump_stack lib/dump_stack.c:77 [inline]
 dump_stack+0x1c9/0x2b4 lib/dump_stack.c:113
89 cf 
41 56 
41 
55 
49 89 
 print_address_description+0x6c/0x20b mm/kasan/report.c:256
fd 41 
54 45 
 kasan_report_error mm/kasan/report.c:354 [inline]
 kasan_report.cold.7+0x242/0x2fe mm/kasan/report.c:412
89 cc 
 __asan_report_load8_noabort+0x14/0x20 mm/kasan/report.c:433
53 
 __rb_change_child include/linux/rbtree_augmented.h:139 [inline]
 __rb_erase_augmented include/linux/rbtree_augmented.h:186 [inline]
 rb_erase+0x34bf/0x3550 lib/rbtree.c:459
65 4c 
8b 34 
25 40 
ee 01 
00 48 
83 e4 f0 
48 81 
ec 60 
03 00 
00 48 
8b 45 
10 <89> 
94 
24 80 
00 00 
00 48 
ba 00 
00 
00 00 
00 fc ff df 
48 89 
84 24 
98 
RSP: 0018:ffff88019ba80f70 EFLAGS: 00010082
RAX: 0000000000000000 RBX: 1ffff1003375026b RCX: 0000000000000002
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffffffff88f92620
RBP: ffff88019ba81300 R08: 0000000000000000 R09: 0000000000000000
R10: ffff88019d1771b8 R11: ffff8801daf236b3 R12: 0000000000000000
R13: ffffffff88f92620 R14: ffff8801a8d90300 R15: 0000000000000002
FS:  00007f7898f9f700(0000) GS:ffff8801daf00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffff88019ba80f68 CR3: 00000001b9825000 CR4: 00000000001406e0
DR0: 0000000020000000 DR1: 0000000020000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000600
Call Trace:

Crashes (1):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2018/07/06 20:25 bpf-next 6fcf9b1d4d6c 9636bc93 .config console log report ci-upstream-bpf-next-kasan-gce
* Struck through repros no longer work on HEAD.