Hello,
syzbot found the following crash on:
HEAD commit: 3b955a40 usb-fuzzer: main usb gadget fuzzer driver
git tree: kmsan
console output: https://syzkaller.appspot.com/x/log.txt?x=15014d44a00000
kernel config: https://syzkaller.appspot.com/x/.config?x=602468164ccdc30a
dashboard link: https://syzkaller.appspot.com/bug?extid=e9687dbb0b6b2057d0ed
compiler: clang version 9.0.0 (/home/glider/llvm/clang
06d00afa61eef8f7f501ebdb4e8612ea43ec2d78)
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+e9687dbb0b6b2057d...@syzkaller.appspotmail.com
==================================================================
BUG: KMSAN: uninit-value in tomoyo_check_unix_address+0x36a/0xa30
security/tomoyo/network.c:597
CPU: 1 PID: 30810 Comm: syz-executor.4 Not tainted 5.1.0+ #3
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+0x191/0x1f0 lib/dump_stack.c:113
kmsan_report+0x130/0x2a0 mm/kmsan/kmsan.c:619
__msan_warning+0x75/0xe0 mm/kmsan/kmsan_instr.c:310
tomoyo_check_unix_address+0x36a/0xa30 security/tomoyo/network.c:597
tomoyo_socket_connect_permission+0x315/0x400 security/tomoyo/network.c:705
tomoyo_socket_connect+0x8b/0xa0 security/tomoyo/tomoyo.c:456
security_socket_connect+0x127/0x200 security/security.c:1948
__sys_connect+0x536/0x820 net/socket.c:1804
__do_sys_connect net/socket.c:1819 [inline]
__se_sys_connect+0x8d/0xb0 net/socket.c:1816
__x64_sys_connect+0x4a/0x70 net/socket.c:1816
do_syscall_64+0xbc/0xf0 arch/x86/entry/common.c:291
entry_SYSCALL_64_after_hwframe+0x63/0xe7
RIP: 0033:0x458da9
Code: ad b8 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 7b b8 fb ff c3 66 2e 0f 1f 84 00 00 00 00
RSP: 002b:00007f825eeb8c78 EFLAGS: 00000246 ORIG_RAX: 000000000000002a
RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000000458da9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000003
RBP: 000000000073bf00 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 00007f825eeb96d4
R13: 00000000004bf2cf R14: 00000000004d0660 R15: 00000000ffffffff
Local variable description: ----address@__sys_connect
Variable was created at:
sockfd_lookup_light net/socket.c:488 [inline]
__sys_connect+0x8c/0x820 net/socket.c:1796
__do_sys_connect net/socket.c:1819 [inline]
__se_sys_connect+0x8d/0xb0 net/socket.c:1816
==================================================================
---
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