From: syzbot <syzbot+d29e58bb557324e55e5e@syzkaller.appspotmail.com>
To: akpm@linux-foundation.org, 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@chromium.org, kuba@kernel.org,
linux-kernel@vger.kernel.org, mingo@elte.hu, mingo@redhat.com,
mmullins@fb.com, netdev@vger.kernel.org, peterz@infradead.org,
rostedt@goodmis.org, songliubraving@fb.com,
syzkaller-bugs@googlegroups.com, yhs@fb.com
Subject: KASAN: vmalloc-out-of-bounds Read in bpf_trace_run3
Date: Mon, 02 Nov 2020 03:54:19 -0800 [thread overview]
Message-ID: <00000000000004500b05b31e68ce@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 080b6f40 bpf: Don't rely on GCC __attribute__((optimize)) ..
git tree: bpf
console output: https://syzkaller.appspot.com/x/log.txt?x=1089d37c500000
kernel config: https://syzkaller.appspot.com/x/.config?x=58a4ca757d776bfe
dashboard link: https://syzkaller.appspot.com/bug?extid=d29e58bb557324e55e5e
compiler: gcc (GCC) 10.1.0-syz 20200507
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=10f4b032500000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1371a47c500000
The issue was bisected to:
commit 9df1c28bb75217b244257152ab7d788bb2a386d0
Author: Matt Mullins <mmullins@fb.com>
Date: Fri Apr 26 18:49:47 2019 +0000
bpf: add writable context for raw tracepoints
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=12b6c4da500000
final oops: https://syzkaller.appspot.com/x/report.txt?x=11b6c4da500000
console output: https://syzkaller.appspot.com/x/log.txt?x=16b6c4da500000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+d29e58bb557324e55e5e@syzkaller.appspotmail.com
Fixes: 9df1c28bb752 ("bpf: add writable context for raw tracepoints")
==================================================================
BUG: KASAN: vmalloc-out-of-bounds in __bpf_trace_run kernel/trace/bpf_trace.c:2045 [inline]
BUG: KASAN: vmalloc-out-of-bounds in bpf_trace_run3+0x3e0/0x3f0 kernel/trace/bpf_trace.c:2083
Read of size 8 at addr ffffc90000e6c030 by task kworker/0:3/3754
CPU: 0 PID: 3754 Comm: kworker/0:3 Not tainted 5.9.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: 0x0 (events)
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x107/0x163 lib/dump_stack.c:118
print_address_description.constprop.0.cold+0x5/0x4c8 mm/kasan/report.c:385
__kasan_report mm/kasan/report.c:545 [inline]
kasan_report.cold+0x1f/0x37 mm/kasan/report.c:562
__bpf_trace_run kernel/trace/bpf_trace.c:2045 [inline]
bpf_trace_run3+0x3e0/0x3f0 kernel/trace/bpf_trace.c:2083
__bpf_trace_sched_switch+0xdc/0x120 include/trace/events/sched.h:138
__traceiter_sched_switch+0x64/0xb0 include/trace/events/sched.h:138
trace_sched_switch include/trace/events/sched.h:138 [inline]
__schedule+0xeb8/0x2130 kernel/sched/core.c:4520
schedule+0xcf/0x270 kernel/sched/core.c:4601
worker_thread+0x14c/0x1120 kernel/workqueue.c:2439
kthread+0x3af/0x4a0 kernel/kthread.c:292
ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:296
Memory state around the buggy address:
ffffc90000e6bf00: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90000e6bf80: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
>ffffc90000e6c000: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
^
ffffc90000e6c080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8
ffffc90000e6c100: 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.
For information about bisection process see: https://goo.gl/tpsmEJ#bisection
syzbot can test patches for this issue, for details see:
https://goo.gl/tpsmEJ#testing-patches
next reply other threads:[~2020-11-02 11:54 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-11-02 11:54 syzbot [this message]
2020-11-11 14:57 ` KASAN: vmalloc-out-of-bounds Read in bpf_trace_run3 Dmitry Vyukov
2020-11-13 5:37 ` Matt Mullins
2020-11-13 16:08 ` Yonghong Song
2021-02-10 18:23 ` Eric Dumazet
2021-02-10 19:52 ` Steven Rostedt
2020-11-15 5:52 ` [PATCH] bpf: don't fail kmalloc while releasing raw_tp Matt Mullins
2020-11-16 17:19 ` Steven Rostedt
2020-11-16 20:37 ` Mathieu Desnoyers
2020-11-16 20:44 ` Steven Rostedt
2020-11-16 21:02 ` Steven Rostedt
2020-11-16 21:06 ` Steven Rostedt
2020-11-16 21:34 ` Mathieu Desnoyers
2020-11-16 22:10 ` Steven Rostedt
2020-11-17 23:05 ` Mathieu Desnoyers
2020-11-18 0:42 ` Matt Mullins
2020-11-18 1:09 ` Steven Rostedt
2020-11-18 4:57 ` Paul E. McKenney
2020-11-16 21:21 ` Mathieu Desnoyers
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