Hello, syzbot found the following crash on:
HEAD commit: 8bbbc5cf kmsan: don't compile memmove git tree: https://github.com/google/kmsan.git master console output: https://syzkaller.appspot.com/x/log.txt?x=14c92275e00000 kernel config: https://syzkaller.appspot.com/x/.config?x=cd0e9a6b0e555cc3 dashboard link: https://syzkaller.appspot.com/bug?extid=c82752228ed975b0a623 compiler: clang version 10.0.0 (https://github.com/llvm/llvm-project/ c2443155a0fb245c8f17f2c1c72b6ea391e86e81) userspace arch: i386 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=11d74a75e00000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=14694b45e00000 IMPORTANT: if you fix the bug, please add the following tag to the commit: Reported-by: syzbot+c82752228ed975b0a...@syzkaller.appspotmail.com ===================================================== BUG: KMSAN: uninit-value in ax25_connect+0x92d/0x1e00 net/ax25/af_ax25.c:1203 CPU: 1 PID: 11844 Comm: syz-executor808 Not tainted 5.6.0-rc2-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+0x1c9/0x220 lib/dump_stack.c:118 kmsan_report+0xf7/0x1e0 mm/kmsan/kmsan_report.c:118 __msan_warning+0x58/0xa0 mm/kmsan/kmsan_instr.c:215 ax25_connect+0x92d/0x1e00 net/ax25/af_ax25.c:1203 __sys_connect_file net/socket.c:1857 [inline] __sys_connect+0x6f7/0x770 net/socket.c:1874 __do_sys_connect net/socket.c:1885 [inline] __se_sys_connect net/socket.c:1882 [inline] __ia32_sys_connect+0xdb/0x130 net/socket.c:1882 do_syscall_32_irqs_on arch/x86/entry/common.c:339 [inline] do_fast_syscall_32+0x3c7/0x6e0 arch/x86/entry/common.c:410 entry_SYSENTER_compat+0x68/0x77 arch/x86/entry/entry_64_compat.S:139 RIP: 0023:0xf7ff7d99 Code: 90 e8 0b 00 00 00 f3 90 0f ae e8 eb f9 8d 74 26 00 89 3c 24 c3 90 90 90 90 90 90 90 90 90 90 90 90 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 eb 0d 90 90 90 90 90 90 90 90 90 90 90 90 RSP: 002b:00000000ff80833c EFLAGS: 00000246 ORIG_RAX: 000000000000016a RAX: ffffffffffffffda RBX: 0000000000000003 RCX: 0000000020000000 RDX: 000000000000003c RSI: 00000000080ea078 RDI: 00000000ff808390 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 Local variable ----address@__sys_connect created at: __sys_connect+0xf7/0x770 net/socket.c:1870 __sys_connect+0xf7/0x770 net/socket.c:1870 ===================================================== --- 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 syzkal...@googlegroups.com. syzbot will keep track of this bug report. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. syzbot can test patches for this bug, for details see: https://goo.gl/tpsmEJ#testing-patches
