From: syzbot <syzbot+6856926fbb5e9b794e5c@syzkaller.appspotmail.com>
To: linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com,
wojciech.gladysz@infogain.com
Subject: Re: [syzbot] [bpf?] [net?] KMSAN: uninit-value in bpf_prog_test_run_xdp
Date: Mon, 01 Jul 2024 05:40:02 -0700 [thread overview]
Message-ID: <000000000000576bfa061c2ee53e@google.com> (raw)
In-Reply-To: <20240701101742.15473-1-wojciech.gladysz@infogain.com>
Hello,
syzbot has tested the proposed patch but the reproducer is still triggering an issue:
KMSAN: uninit-value in bpf_prog_test_run_xdp
=====================================================
BUG: KMSAN: uninit-value in bpf_prog_test_run_xdp+0x175d/0x1a40 net/bpf/test_run.c:1287
bpf_prog_test_run_xdp+0x175d/0x1a40 net/bpf/test_run.c:1287
bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
__sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
do_syscall_64+0xd5/0x1f0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Uninit was stored to memory at:
bpf_test_run+0x52e/0xc30
bpf_prog_test_run_xdp+0xeaa/0x1a40 net/bpf/test_run.c:1277
bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
__sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
do_syscall_64+0xd5/0x1f0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Uninit was stored to memory at:
___bpf_prog_run+0x58c4/0xe0f0
__bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2252
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:667 [inline]
bpf_prog_run_xdp include/net/xdp.h:514 [inline]
bpf_test_run+0x43e/0xc30 net/bpf/test_run.c:423
bpf_prog_test_run_xdp+0xeaa/0x1a40 net/bpf/test_run.c:1277
bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
__sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
do_syscall_64+0xd5/0x1f0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Uninit was stored to memory at:
___bpf_prog_run+0x9098/0xe0f0
__bpf_prog_run512+0xb5/0xe0 kernel/bpf/core.c:2252
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:667 [inline]
bpf_prog_run_xdp include/net/xdp.h:514 [inline]
bpf_test_run+0x43e/0xc30 net/bpf/test_run.c:423
bpf_prog_test_run_xdp+0xeaa/0x1a40 net/bpf/test_run.c:1277
bpf_prog_test_run+0x6b7/0xad0 kernel/bpf/syscall.c:4240
__sys_bpf+0x6aa/0xd90 kernel/bpf/syscall.c:5649
__do_sys_bpf kernel/bpf/syscall.c:5738 [inline]
__se_sys_bpf kernel/bpf/syscall.c:5736 [inline]
__x64_sys_bpf+0xa0/0xe0 kernel/bpf/syscall.c:5736
do_syscall_64+0xd5/0x1f0
entry_SYSCALL_64_after_hwframe+0x6d/0x75
Local variable stack created at:
__bpf_prog_run512+0x45/0xe0 kernel/bpf/core.c:2252
bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
__bpf_prog_run include/linux/filter.h:667 [inline]
bpf_prog_run_xdp include/net/xdp.h:514 [inline]
bpf_test_run+0x43e/0xc30 net/bpf/test_run.c:423
CPU: 0 PID: 5442 Comm: syz-executor.0 Not tainted 6.9.0-rc1-syzkaller-00257-ge478cf26c556-dirty #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 06/07/2024
=====================================================
Tested on:
commit: e478cf26 Merge branch 'bpf-fix-a-couple-of-test-failur..
git tree: https://linux.googlesource.com/linux/kernel/git/torvalds/linux
console output: https://syzkaller.appspot.com/x/log.txt?x=14d7871e980000
kernel config: https://syzkaller.appspot.com/x/.config?x=e2599baf258ef795
dashboard link: https://syzkaller.appspot.com/bug?extid=6856926fbb5e9b794e5c
compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
patch: https://syzkaller.appspot.com/x/patch.diff?x=162e5ed1980000
next parent reply other threads:[~2024-07-01 12:40 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20240701101742.15473-1-wojciech.gladysz@infogain.com>
2024-07-01 12:40 ` syzbot [this message]
2024-03-10 9:16 [syzbot] [bpf?] [net?] KMSAN: uninit-value in bpf_prog_test_run_xdp syzbot
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