| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-ID: <000000000000385cbf05ea3f1862@google.com>
Date: Tue, 04 Oct 2022 17:59:53 -0700
From: syzbot <syzbot+534ee3d24c37c411f37f@...kaller.appspotmail.com>
To: gregkh@...uxfoundation.org, linux-kernel@...r.kernel.org,
syzkaller-bugs@...glegroups.com, tj@...nel.org
Subject: [syzbot] general protection fault in kernfs_get_inode
Hello,
syzbot found the following issue on:
HEAD commit: 0326074ff465 Merge tag 'net-next-6.1' of git://git.kernel...
git tree: upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=1067555c880000
kernel config: https://syzkaller.appspot.com/x/.config?x=e1de7ca9efcc028c
dashboard link: https://syzkaller.appspot.com/bug?extid=534ee3d24c37c411f37f
compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2
Unfortunately, I don't have any reproducer for this issue yet.
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/43729d6ce2fc/disk-0326074f.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/1f76d6f68eb3/vmlinux-0326074f.xz
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+534ee3d24c37c411f37f@...kaller.appspotmail.com
general protection fault, probably for non-canonical address 0xdffffc0000000012: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000090-0x0000000000000097]
CPU: 1 PID: 29107 Comm: syz-executor.3 Not tainted 6.0.0-syzkaller-02734-g0326074ff465 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022
RIP: 0010:kernfs_ino include/linux/kernfs.h:358 [inline]
RIP: 0010:kernfs_get_inode+0x2e/0x520 fs/kernfs/inode.c:254
Code: 41 56 41 55 41 54 49 89 fc 53 48 89 f3 e8 1a 04 7e ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 3a 04 00 00 48 8b b3 90 00 00 00 4c 89 e7 e8 79
RSP: 0018:ffffc9000323fa30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900069ba000
RDX: 0000000000000012 RSI: ffffffff81fd1156 RDI: 0000000000000090
RBP: ffffc9000323fa50 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000000007c R12: ffff8880205d4000
R13: ffff88802368b000 R14: ffff88801ba6d880 R15: ffff88802378e000
FS: 00007fa73c7aa700(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007fd6239b0000 CR3: 00000000782f6000 CR4: 00000000003526e0
Call Trace:
<TASK>
cgroup_may_write+0x86/0x120 kernel/cgroup/cgroup.c:4937
cgroup_css_set_fork kernel/cgroup/cgroup.c:6237 [inline]
cgroup_can_fork+0x961/0xec0 kernel/cgroup/cgroup.c:6331
copy_process+0x43ed/0x7090 kernel/fork.c:2358
kernel_clone+0xe7/0xab0 kernel/fork.c:2671
__do_sys_clone3+0x1cd/0x2e0 kernel/fork.c:2963
do_syscall_x64 arch/x86/entry/common.c:50 [inline]
do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80
entry_SYSCALL_64_after_hwframe+0x63/0xcd
RIP: 0033:0x7fa73b68a5a9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 73 01 c3 48 c7 c1 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007fa73c7aa038 EFLAGS: 00000246 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fa73b7abf80 RCX: 00007fa73b68a5a9
RDX: 0000000000000000 RSI: 0000000000000058 RDI: 00007fa73c7aa050
RBP: 00007fa73b6e5580 R08: 0000000000000000 R09: 0000000000000058
R10: 00007fa73c7aa050 R11: 0000000000000246 R12: 0000000000000058
R13: 00007fa73bcdfb1f R14: 00007fa73c7aa300 R15: 0000000000022000
</TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:kernfs_ino include/linux/kernfs.h:358 [inline]
RIP: 0010:kernfs_get_inode+0x2e/0x520 fs/kernfs/inode.c:254
Code: 41 56 41 55 41 54 49 89 fc 53 48 89 f3 e8 1a 04 7e ff 48 8d bb 90 00 00 00 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 <80> 3c 02 00 0f 85 3a 04 00 00 48 8b b3 90 00 00 00 4c 89 e7 e8 79
RSP: 0018:ffffc9000323fa30 EFLAGS: 00010206
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: ffffc900069ba000
RDX: 0000000000000012 RSI: ffffffff81fd1156 RDI: 0000000000000090
RBP: ffffc9000323fa50 R08: 0000000000000005 R09: 0000000000000000
R10: 0000000000000001 R11: 000000000000007c R12: ffff8880205d4000
R13: ffff88802368b000 R14: ffff88801ba6d880 R15: ffff88802378e000
FS: 00007fa73c7aa700(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00000000200e6000 CR3: 00000000782f6000 CR4: 00000000003526f0
----------------
Code disassembly (best guess):
0: 41 56 push %r14
2: 41 55 push %r13
4: 41 54 push %r12
6: 49 89 fc mov %rdi,%r12
9: 53 push %rbx
a: 48 89 f3 mov %rsi,%rbx
d: e8 1a 04 7e ff callq 0xff7e042c
12: 48 8d bb 90 00 00 00 lea 0x90(%rbx),%rdi
19: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax
20: fc ff df
23: 48 89 fa mov %rdi,%rdx
26: 48 c1 ea 03 shr $0x3,%rdx
* 2a: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction
2e: 0f 85 3a 04 00 00 jne 0x46e
34: 48 8b b3 90 00 00 00 mov 0x90(%rbx),%rsi
3b: 4c 89 e7 mov %r12,%rdi
3e: e8 .byte 0xe8
3f: 79 .byte 0x79
---
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 syzkaller@...glegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
Powered by blists - more mailing lists