From: syzbot <syzbot+7446526858b83c8828b2@syzkaller.appspotmail.com>
To: dledford@redhat.com, glider@google.com, jgg@ziepe.ca,
leon@kernel.org, linux-kernel@vger.kernel.org,
linux-rdma@vger.kernel.org, syzkaller-bugs@googlegroups.com
Subject: KMSAN: uninit-value in ucma_connect
Date: Tue, 21 Jul 2020 22:53:20 -0700 [thread overview]
Message-ID: <000000000000648aca05ab015bd3@google.com> (raw)
Hello,
syzbot found the following issue on:
HEAD commit: 14525656 compiler.h: reinstate missing KMSAN_INIT
git tree: https://github.com/google/kmsan.git master
console output: https://syzkaller.appspot.com/x/log.txt?x=124a0817100000
kernel config: https://syzkaller.appspot.com/x/.config?x=c534a9fad6323722
dashboard link: https://syzkaller.appspot.com/bug?extid=7446526858b83c8828b2
compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81)
syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13db936f100000
C reproducer: https://syzkaller.appspot.com/x/repro.c?x=16c18d7d100000
IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+7446526858b83c8828b2@syzkaller.appspotmail.com
=====================================================
BUG: KMSAN: uninit-value in ucma_connect+0x2aa/0xab0 drivers/infiniband/core/ucma.c:1091
CPU: 0 PID: 8457 Comm: syz-executor069 Not tainted 5.8.0-rc5-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
__dump_stack lib/dump_stack.c:77 [inline]
dump_stack+0x1df/0x240 lib/dump_stack.c:118
kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:121
__msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215
ucma_connect+0x2aa/0xab0 drivers/infiniband/core/ucma.c:1091
ucma_write+0x5c5/0x630 drivers/infiniband/core/ucma.c:1764
do_loop_readv_writev fs/read_write.c:737 [inline]
do_iter_write+0x710/0xdc0 fs/read_write.c:1020
vfs_writev fs/read_write.c:1091 [inline]
do_writev+0x42d/0x8f0 fs/read_write.c:1134
__do_sys_writev fs/read_write.c:1207 [inline]
__se_sys_writev+0x9b/0xb0 fs/read_write.c:1204
__x64_sys_writev+0x4a/0x70 fs/read_write.c:1204
do_syscall_64+0xb0/0x150 arch/x86/entry/common.c:386
entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x4402a9
Code: Bad RIP value.
RSP: 002b:00007ffd6e4541e8 EFLAGS: 00000246 ORIG_RAX: 0000000000000014
RAX: ffffffffffffffda RBX: 00000000004002c8 RCX: 00000000004402a9
RDX: 0000000000000001 RSI: 00000000200000c0 RDI: 0000000000000005
RBP: 00000000006ca018 R08: 00000000004002c8 R09: 00000000004002c8
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000401ab0
R13: 0000000000401b40 R14: 0000000000000000 R15: 0000000000000000
Local variable ----cmd@ucma_connect created at:
ucma_connect+0xe1/0xab0 drivers/infiniband/core/ucma.c:1082
ucma_connect+0xe1/0xab0 drivers/infiniband/core/ucma.c:1082
=====================================================
---
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.
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syzbot can test patches for this issue, for details see:
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reply other threads:[~2020-07-22 5:53 UTC|newest]
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