From: syzbot <syzbot+e2c932aec5c8a6e1d31c@syzkaller.appspotmail.com>
To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org,
daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com,
haoluo@google.com, hawk@kernel.org, john.fastabend@gmail.com,
jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org,
linux-kernel@vger.kernel.org,
linux-trace-kernel@vger.kernel.org, martin.lau@kernel.org,
martin.lau@linux.dev, mhiramat@kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com, rostedt@goodmis.org,
sdf@google.com, song@kernel.org,
syzkaller-bugs@googlegroups.com, yhs@fb.com,
yonghong.song@linux.dev
Subject: [syzbot] [bpf?] [trace?] WARNING in format_decode (3)
Date: Tue, 21 Nov 2023 14:43:19 -0800 [thread overview]
Message-ID: <0000000000004b6de5060ab1545b@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 76df934c6d5f MAINTAINERS: Add netdev subsystem profile link
git tree: net
console+strace: https://syzkaller.appspot.com/x/log.txt?x=10c2b667680000
kernel config: https://syzkaller.appspot.com/x/.config?x=84217b7fc4acdc59
dashboard link: https://syzkaller.appspot.com/bug?extid=e2c932aec5c8a6e1d31c
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b2f668e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=171ea200e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e271179068c6/disk-76df934c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b9523b3749bb/vmlinux-76df934c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6c1a888bade0/bzImage-76df934c.xz
The issue was bisected to:
commit 114039b342014680911c35bd6b72624180fd669a
Author: Stanislav Fomichev <sdf@google.com>
Date: Mon Nov 21 18:03:39 2022 +0000
bpf: Move skb->len == 0 checks into __bpf_redirect
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13d237b7680000
final oops: https://syzkaller.appspot.com/x/report.txt?x=103237b7680000
console output: https://syzkaller.appspot.com/x/log.txt?x=17d237b7680000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2c932aec5c8a6e1d31c@syzkaller.appspotmail.com
Fixes: 114039b34201 ("bpf: Move skb->len == 0 checks into __bpf_redirect")
------------[ cut here ]------------
Please remove unsupported %\0 in format string
WARNING: CPU: 0 PID: 5068 at lib/vsprintf.c:2675 format_decode+0xa03/0xba0 lib/vsprintf.c:2675
Modules linked in:
CPU: 0 PID: 5068 Comm: syz-executor288 Not tainted 6.7.0-rc1-syzkaller-00134-g76df934c6d5f #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023
RIP: 0010:format_decode+0xa03/0xba0 lib/vsprintf.c:2675
Code: f7 41 c6 44 24 05 08 e9 c4 fa ff ff e8 c6 f7 15 f7 c6 05 0b bd 91 04 01 90 48 c7 c7 60 5f 19 8c 40 0f b6 f5 e8 2e 17 dc f6 90 <0f> 0b 90 90 e9 17 fc ff ff 48 8b 3c 24 e8 4b 87 6c f7 e9 13 f7 ff
RSP: 0018:ffffc90003b6f798 EFLAGS: 00010286
RAX: 0000000000000000 RBX: ffffc90003b6fa0c RCX: ffffffff814db209
RDX: ffff8880214b9dc0 RSI: ffffffff814db216 RDI: 0000000000000001
RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000001 R12: ffffc90003b6f898
R13: 0000000000000000 R14: 0000000000000000 R15: 00000000ffffffd0
FS: 000055555567c380(0000) GS:ffff8880b9800000(0000) knlGS:0000000000000000
CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000000f6f398 CR3: 00000000251e7000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
<TASK>
bstr_printf+0x13b/0x1050 lib/vsprintf.c:3248
____bpf_trace_printk kernel/trace/bpf_trace.c:386 [inline]
bpf_trace_printk+0x10b/0x180 kernel/trace/bpf_trace.c:371
bpf_prog_12183cdb1cd51dab+0x36/0x3a
bpf_dispatcher_nop_func include/linux/bpf.h:1196 [inline]
__bpf_prog_run include/linux/filter.h:651 [inline]
bpf_prog_run include/linux/filter.h:658 [inline]
bpf_test_run+0x3e1/0x9e0 net/bpf/test_run.c:423
bpf_prog_test_run_skb+0xb75/0x1dd0 net/bpf/test_run.c:1045
bpf_prog_test_run kernel/bpf/syscall.c:4040 [inline]
__sys_bpf+0x11bf/0x4920 kernel/bpf/syscall.c:5401
__do_sys_bpf kernel/bpf/syscall.c:5487 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5485 [inline]
__x64_sys_bpf+0x78/0xc0 kernel/bpf/syscall.c:5485
do_syscall_x64 arch/x86/entry/common.c:51 [inline]
do_syscall_64+0x40/0x110 arch/x86/entry/common.c:82
entry_SYSCALL_64_after_hwframe+0x63/0x6b
RIP: 0033:0x7fefcec014e9
Code: 48 83 c4 28 c3 e8 37 17 00 00 0f 1f 80 00 00 00 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:00007ffca6179888 EFLAGS: 00000246 ORIG_RAX: 0000000000000141
RAX: ffffffffffffffda RBX: 00007ffca6179a58 RCX: 00007fefcec014e9
RDX: 0000000000000028 RSI: 0000000020000080 RDI: 000000000000000a
RBP: 00007fefcec74610 R08: 0000000000000000 R09: 00007ffca6179a58
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffca6179a48 R14: 0000000000000001 R15: 0000000000000001
</TASK>
---
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:
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For information about bisection process see: https://goo.gl/tpsmEJ#bisection
If the report is already addressed, let syzbot know by replying with:
#syz fix: exact-commit-title
If you want syzbot to run the reproducer, reply with:
#syz test: git://repo/address.git branch-or-commit-hash
If you attach or paste a git patch, syzbot will apply it before testing.
If you want to overwrite report's subsystems, reply with:
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If the report is a duplicate of another one, reply with:
#syz dup: exact-subject-of-another-report
If you want to undo deduplication, reply with:
#syz undup
WARNING: multiple messages have this Message-ID (diff)
From: syzbot <syzbot+e2c932aec5c8a6e1d31c@syzkaller.appspotmail.com>
To: andrii@kernel.org, ast@kernel.org, bpf@vger.kernel.org,
daniel@iogearbox.net, davem@davemloft.net, edumazet@google.com,
haoluo@google.com, hawk@kernel.org, john.fastabend@gmail.com,
jolsa@kernel.org, kpsingh@kernel.org, kuba@kernel.org,
linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org,
martin.lau@kernel.org, martin.lau@linux.dev, mhiramat@kernel.org,
netdev@vger.kernel.org, pabeni@redhat.com, rostedt@goodmis.org,
sdf@google.com, song@kernel.org, syzkaller-bugs@googlegroups.com,
yhs@fb.com, yonghong.song@linux.dev
Subject: [syzbot] [bpf?] [trace?] WARNING in format_decode (3)
Date: Tue, 21 Nov 2023 14:43:19 -0800 [thread overview]
Message-ID: <0000000000004b6de5060ab1545b@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 76df934c6d5f MAINTAINERS: Add netdev subsystem profile link
git tree: net
console+strace: https://syzkaller.appspot.com/x/log.txt?x=10c2b667680000
kernel config: https://syzkaller.appspot.com/x/.config?x=84217b7fc4acdc59
dashboard link: https://syzkaller.appspot.com/bug?extid=e2c932aec5c8a6e1d31c
compiler: gcc (Debian 12.2.0-14) 12.2.0, GNU ld (GNU Binutils for Debian) 2.40
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=12b2f668e80000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=171ea200e80000
Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e271179068c6/disk-76df934c.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/b9523b3749bb/vmlinux-76df934c.xz
kernel image: https://storage.googleapis.com/syzbot-assets/6c1a888bade0/bzImage-76df934c.xz
The issue was bisected to:
commit 114039b342014680911c35bd6b72624180fd669a
Author: Stanislav Fomichev <sdf@google.com>
Date: Mon Nov 21 18:03:39 2022 +0000
bpf: Move skb->len == 0 checks into __bpf_redirect
bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=13d237b7680000
final oops: https://syzkaller.appspot.com/x/report.txt?x=103237b7680000
console output: https://syzkaller.appspot.com/x/log.txt?x=17d237b7680000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+e2c932aec5c8a6e1d31c@syzkaller.appspotmail.com
Fixes: 114039b34201 ("bpf: Move skb->len == 0 checks into __bpf_redirect")
------------[ cut here ]------------
Please remove unsupported 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next reply other threads:[~2023-11-21 22:43 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-21 22:43 syzbot [this message]
2023-11-21 22:43 ` [syzbot] [bpf?] [trace?] WARNING in format_decode (3) syzbot
2023-11-22 0:19 ` [syzbot] " syzbot
2023-11-22 0:50 ` [PATCH net] bpf: test_run: fix WARNING in format_decode Edward Adam Davis
2023-11-22 5:28 ` Yonghong Song
2023-11-27 14:10 ` Daniel Borkmann
[not found] <tencent_8D86D7136FA361C960A3B7E4471779F77E05@qq.com>
2023-11-22 0:43 ` [syzbot] [bpf?] [trace?] WARNING in format_decode (3) syzbot
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