#syz dup kernel warning in statcheck On 2018-08-01 at 7:14 syzbot wrote: > Hello, > > syzbot found the following crash on: > > HEAD commit: 8b21413cae5f parlib: Basic implementation of sigaltstack > git tree: https://github.com/akaros/akaros.git/master > console output: https://syzkaller.appspot.com/x/log.txt?x=152ed254400000 > kernel config: https://syzkaller.appspot.com/x/.config?x=efef8cf2939304d3 > dashboard link: https://syzkaller.appspot.com/bug?extid=48c0606f3b8f0af4bfd2 > compiler: > > 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: [email protected] > > kernel warning at kern/src/ns/convM2D.c:52, from core 1: nbuf 123, > STAT_FIX_LEN_9P 49 BIT16SZ 2, GBIT16(buf) 0 > Stack Backtrace on Core 1: > #01 [<0xffffffffc200a30c>] in backtrace at src/kdebug.c:220 > #02 [<0xffffffffc2009ba4>] in _warn at src/init.c:323 > g#03 [< 0xf�ff�fG ��ȥ�ffffc2�034cdd>] in statcheck1 > ;#04 [<0��Q�9�xf�� f�fffff! ���¿ fT�c2 SZ��|�03df88>] in validstat > #05 [<0xffffffffc203efee>] in sysfwstat at src/ns/sysfile.c:421 > #06 [<0xffffffffc2055d10>] in sys_fwstat at src/syscall.c:2271 > #07 [<0xffffffffc20594d9>] in syscall at src/syscall.c:2462 > #08 [<0xffffffffc20596a4>] in run_local_syscall at src/syscall.c:2497 > #09 [<0xffffffffc2059bd9>] in prep_syscalls at src/syscall.c:2517 > #10 [<0xffffffffc20ab56a>] in sysenter_callwrapper at arch/x86/trap.c:854 > kernel warning at kern/src/ns/convM2D.c:52, from core 2: nbuf 174, > STAT_FIX_LEN_9P 49 BIT16SZ 2, GBIT16(buf) 0 > Stack Backtrace on Core 2: > #01 [<0xffffffffc200a30c>] in backtrace at src/kdebug.c:220 > #02 [<0xffffffffc2009ba4>] in _warn at src/init.c:323 > #03 [<0xffffffffc2034cdd>] in statcheck at src/ns/convM2D.c:51 > #04 [<0xffffffffc203df88>] in validstat at src/ns/sysfile.c:961 > #05 [<0xffffffffc203e146>] in syswstat at src/ns/sysfile.c:1159 > #06 [<0xffffffffc2055ccf>] in sys_wstat at src/syscall.c:2263 > #07 [<0xffffffffc20594d9>] in syscall at src/syscall.c:2462 > #08 [<0xffffffffc20596a4>] in run_local_syscall at src/syscall.c:2497 > #09 [<0xffffffffc2059bd9>] in prep_syscalls at src/syscall.c:2517 > #10 [<0xffffffffc20ab56a>] in sysenter_callwrapper at arch/x86/trap.c:854 > > > --- > 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 [email protected]. > > 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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