From: syzbot <syzbot+2f649ec6d2eea1495a8f@syzkaller.appspotmail.com>
To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org,
daniel@iogearbox.net, davem@davemloft.net, hawk@kernel.org,
john.fastabend@gmail.com, kafai@fb.com, kpsingh@kernel.org,
kuba@kernel.org, linux-kernel@vger.kernel.org,
netdev@vger.kernel.org, songliubraving@fb.com,
syzkaller-bugs@googlegroups.com, yhs@fb.com
Subject: [syzbot] KASAN: vmalloc-out-of-bounds Read in bpf_jit_free
Date: Mon, 14 Feb 2022 10:45:19 -0800 [thread overview]
Message-ID: <00000000000073b3e805d7fed17e@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: e5313968c41b Merge branch 'Split bpf_sk_lookup remote_port..
git tree: bpf-next
console output: https://syzkaller.appspot.com/x/log.txt?x=10baced8700000
kernel config: https://syzkaller.appspot.com/x/.config?x=c40b67275bfe2a58
dashboard link: https://syzkaller.appspot.com/bug?extid=2f649ec6d2eea1495a8f
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.
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+2f649ec6d2eea1495a8f@syzkaller.appspotmail.com
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in bpf_jit_binary_pack_free kernel/bpf/core.c:1120 [inline]
BUG: KASAN: vmalloc-out-of-bounds in bpf_jit_free+0x2b5/0x2e0 kernel/bpf/core.c:1151
Read of size 4 at addr ffffffffa0001a80 by task kworker/0:18/13642
CPU: 0 PID: 13642 Comm: kworker/0:18 Not tainted 5.16.0-syzkaller-11655-ge5313968c41b #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: events bpf_prog_free_deferred
Call Trace:
<TASK>
__dump_stack lib/dump_stack.c:88 [inline]
dump_stack_lvl+0xcd/0x134 lib/dump_stack.c:106
print_address_description.constprop.0.cold+0xf/0x336 mm/kasan/report.c:255
__kasan_report mm/kasan/report.c:442 [inline]
kasan_report.cold+0x83/0xdf mm/kasan/report.c:459
bpf_jit_binary_pack_free kernel/bpf/core.c:1120 [inline]
bpf_jit_free+0x2b5/0x2e0 kernel/bpf/core.c:1151
bpf_prog_free_deferred+0x5c1/0x790 kernel/bpf/core.c:2524
process_one_work+0x9ac/0x1650 kernel/workqueue.c:2307
worker_thread+0x657/0x1110 kernel/workqueue.c:2454
kthread+0x2e9/0x3a0 kernel/kthread.c:377
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
</TASK>
Memory state around the buggy address:
ffffffffa0001980: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffffffa0001a00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffffffa0001a80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffffffa0001b00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffffffa0001b80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
==================================================================
---
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@googlegroups.com.
syzbot will keep track of this issue. See:
https://goo.gl/tpsmEJ#status for how to communicate with syzbot.
next reply other threads:[~2022-02-14 18:46 UTC|newest]
Thread overview: 11+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 18:45 syzbot [this message]
2022-02-14 23:52 ` [syzbot] KASAN: vmalloc-out-of-bounds Read in bpf_jit_free Daniel Borkmann
2022-02-15 6:41 ` Song Liu
2022-02-16 1:37 ` Song Liu
2022-02-16 9:38 ` Aleksandr Nogikh
2022-02-16 16:27 ` Song Liu
2022-02-17 18:32 ` Aleksandr Nogikh
2022-02-17 20:05 ` Song Liu
2022-02-18 20:12 ` Aleksandr Nogikh
2022-07-03 7:57 ` syzbot
2022-07-04 9:04 ` Daniel Borkmann
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