syzbot


general protection fault in corrupted (2)

Status: fixed on 2019/03/06 07:43
Reported-by: syzbot+@syzkaller.appspotmail.com
Fix commit: 44039e00171b fou6: Prevent unbounded recursion in GUE error handler
First crash: 1275d, last: 1273d
similar bugs (4):
Kernel Title Repro Cause bisect Fix bisect Count Last Reported Patched Status
upstream general protection fault in corrupted syz 1 1436d 1436d 0/22 closed as invalid on 2018/07/29 11:55
android-54 general protection fault in corrupted C 1 846d 846d 0/2 closed as invalid on 2021/10/13 11:17
upstream BUG: unable to handle kernel paging request in corrupted (3) C done 45 244d 412d 22/22 fixed on 2021/11/10 00:50
upstream KASAN: use-after-free Read in corrupted (4) C done error 8 11h24m 691d 0/22 upstream: reported C repro on 2020/08/11 12:47

Sample crash report:
audit: type=1400 audit(1546886506.356:37): avc:  denied  { associate } for  pid=8487 comm="syz-executor457" name="syz0" scontext=unconfined_u:object_r:unlabeled_t:s0 tcontext=system_u:object_r:unlabeled_t:s0 tclass=filesystem permissive=1
------------[ cut here ]------------
DEBUG_LOCKS_WARN_ON(chain_key != 0)
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#1] PREEMPT SMP KASAN
CPU: 0 PID: 9 Comm:  Not tainted 5.0.0-rc1+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#2] PREEMPT SMP KASAN
CPU: 0 PID: 9 Comm:  Not tainted 5.0.0-rc1+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
------------[ cut here ]------------
Bad or missing usercopy whitelist? Kernel memory overwrite attempt detected to SLAB object 'sighand_cache' (offset 2176, size 8)!
kasan: CONFIG_KASAN_INLINE enabled
kasan: GPF could be caused by NULL-ptr deref or user memory access
general protection fault: 0000 [#3] PREEMPT SMP KASAN
CPU: 0 PID: 9 Comm:  Not tainted 5.0.0-rc1+ #14
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:uprobe_get_trap_addr+0x9a/0xf0 kernel/events/uprobes.c:1660
Code: 00 00 e8 a9 b8 e3 ff 4c 89 e0 5b 41 5c 5d c3 e8 9c b8 e3 ff 49 8d 7c 24 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 41 49 83 7c 24 20 00 74 a0 e8 73 b8 e3 ff 49 8d 7c
RSP: 0018:ffff8880a94798f8 EFLAGS: 00010003
RAX: dffffc0000000000 RBX: ffff8880a9479938 RCX: ffffffff880009e7
RDX: 0000000000000008 RSI: ffffffff819e3e94 RDI: 0000000000000044
RBP: ffff8880a9479908 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000024
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000130 CR3: 0000000009871000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
Modules linked in:
==================================================================
---[ end trace d0d4250f91f480df ]---
RIP: 0010:uprobe_get_trap_addr+0x9a/0xf0 kernel/events/uprobes.c:1660
Code: 00 00 e8 a9 b8 e3 ff 4c 89 e0 5b 41 5c 5d c3 e8 9c b8 e3 ff 49 8d 7c 24 20 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 75 41 49 83 7c 24 20 00 74 a0 e8 73 b8 e3 ff 49 8d 7c
RSP: 0018:ffff8880a947a568 EFLAGS: 00010003
RAX: dffffc0000000000 RBX: ffff8880a947a5a8 RCX: ffffffff880009e7
RDX: 0000000000000008 RSI: ffffffff819e3e94 RDI: 0000000000000044
RBP: ffff8880a947a578 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000024
R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880ae600000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000000130 CR3: 0000000009871000 CR4: 00000000001406f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (2):
Manager Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Title
ci-upstream-kasan-gce-selinux-root 2019/01/07 18:45 upstream 3bd6e94bec12 69d69aa9 .config log report syz C
ci-upstream-kasan-gce-selinux-root 2019/01/04 23:34 upstream 96d4f267e40f 0127e3ba .config log report syz C