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Message-ID: <00000000000005859b0574ab47e5@google.com> Date: Thu, 30 Aug 2018 11:31:03 -0700 From: syzbot <syzbot+0049bebbf3042dbd2e8f@...kaller.appspotmail.com> To: davem@...emloft.net, linux-kernel@...r.kernel.org, linux-rdma@...r.kernel.org, netdev@...r.kernel.org, rds-devel@....oracle.com, santosh.shilimkar@...cle.com, syzkaller-bugs@...glegroups.com Subject: KMSAN: uninit-value in rds_connect Hello, syzbot found the following crash on: HEAD commit: 2dca2cbde67a kmsan: fix build warnings with CONFIG_KMSAN=n git tree: https://github.com/google/kmsan.git/master console output: https://syzkaller.appspot.com/x/log.txt?x=1519734a400000 kernel config: https://syzkaller.appspot.com/x/.config?x=820d6393634b55e3 dashboard link: https://syzkaller.appspot.com/bug?extid=0049bebbf3042dbd2e8f compiler: clang version 8.0.0 (trunk 339414) Unfortunately, I don't have any reproducer for this crash yet. IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+0049bebbf3042dbd2e8f@...kaller.appspotmail.com RDX: 0000000000000000 RSI: 0000000020000380 RDI: 00000000000001ff RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000003 R13: 00000000004cd2e8 R14: 00000000004c3d93 R15: 0000000000000003 ================================================================== BUG: KMSAN: uninit-value in rds_connect+0x213/0x950 net/rds/af_rds.c:511 CPU: 0 PID: 8117 Comm: syz-executor6 Not tainted 4.19.0-rc1+ #36 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+0x14b/0x190 lib/dump_stack.c:113 kmsan_report+0x183/0x2b0 mm/kmsan/kmsan.c:956 __msan_warning+0x70/0xc0 mm/kmsan/kmsan_instr.c:645 rds_connect+0x213/0x950 net/rds/af_rds.c:511 __sys_connect+0x64e/0x750 net/socket.c:1662 __do_sys_connect net/socket.c:1673 [inline] __se_sys_connect net/socket.c:1670 [inline] __x64_sys_connect+0xd8/0x120 net/socket.c:1670 do_syscall_64+0x15b/0x220 arch/x86/entry/common.c:290 entry_SYSCALL_64_after_hwframe+0x63/0xe7 RIP: 0033:0x457089 Code: fd b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 00 66 90 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 0f 83 cb b4 fb ff c3 66 2e 0f 1f 84 00 00 00 00 RSP: 002b:00007f7090fc1c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a RAX: ffffffffffffffda RBX: 00007f7090fc26d4 RCX: 0000000000457089 RDX: 0000000000000000 RSI: 0000000020000000 RDI: 0000000000000003 RBP: 00000000009300a0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000ffffffff R13: 00000000004cb710 R14: 00000000004c320b R15: 0000000000000000 Local variable description: ----address@...ys_connect Variable was created at: __sys_connect+0x6a/0x750 net/socket.c:1645 __do_sys_connect net/socket.c:1673 [inline] __se_sys_connect net/socket.c:1670 [inline] __x64_sys_connect+0xd8/0x120 net/socket.c:1670 ================================================================== --- This bug 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@...glegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#bug-status-tracking for how to communicate with syzbot.
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