[LTP] SIGSEGV in faccessat01 and fchmodat01

[Jan Stancek]

----- Original Message -----
> (gdb) r
> Starting program: /opt/ltp/testcases/bin/fchmodat01
> 
> Program received signal SIGSEGV, Segmentation fault.
> strlen () at ../sysdeps/arm/strlen.S:33
> 33              sfi_breg r1, \
> (gdb) bt
> #0  strlen () at ../sysdeps/arm/strlen.S:33
> #1  0x44583cfc in _IO_vfprintf_internal (s=s@entry=0x34030,
> format=format@entry=0x1c320 "%s/fchmodattest%d.txt", ap=..., ap@entry=...)
>     at /usr/src/debug/glibc/2.25-r0/git/stdio-common/vfprintf.c:1637
> #2  0x44624e64 in ___vfprintf_chk (fp=fp@entry=0x34030, flag=flag@entry=1,
> format=0x1c320 "%s/fchmodattest%d.txt",
>     format@entry=0x33b64 <testfile2> "/tmp/fchBEt8Uu/fchmodattest816.txt",
>     ap=..., ap@entry=...)
>     at /usr/src/debug/glibc/2.25-r0/git/debug/vfprintf_chk.c:33
> #3  0x0001383c in vfprintf (__ap=..., __fmt=0x33b64 <testfile2>
> "/tmp/fchBEt8Uu/fchmodattest816.txt", __stream=0x34030)
>     at /usr/include/bits/stdio2.h:127
> #4  safe_file_printf (file=file@entry=0x1c2b0 "fchmodat01.c",
> lineno=lineno@entry=131, cleanup_fn=cleanup_fn@entry=0x121a4 <cleanup>,
>     path=path@entry=0x33b64 <testfile2> "/tmp/fchBEt8Uu/fchmodattest816.txt",
>     fmt=fmt@entry=0x1c320 "%s/fchmodattest%d.txt")
>     at /usr/src/debug/ltp/20170116-r0/git/lib/safe_file_ops.c:280
> #5  0x00012384 in setup () at
> /usr/src/debug/ltp/20170116-r0/git/testcases/kernel/syscalls/fchmodat/fchmodat01.c:131
> #6  0x00011f18 in main (ac=1, av=0xbefffdd4) at
> /usr/src/debug/ltp/20170116-r0/git/testcases/kernel/syscalls/fchmodat/fchmodat01.c:84
> (gdb)
> 
> Kernel: 4.0.0-ADI-1.2.0-yocto-standard
> LTP Version: 20170116

Format string for SAFE_FILE_PRINTF was missing in these two tests,
which might explain the crashes.

Can you retry with patch below or LTP version that has it?
  4141bdb441f7 ("faccessat and fchmodat: Fix build warnings")

$ git tag --contains 4141bdb441f7
20170929
20180118

Regards,
Jan

> Distro : Poky (Yocto Project Reference Distro)
> DIstro Version: pyro
> 
> The kernel was from Analog Device Inc, it is built for the board named
> ADSP-SC589
> Sorry for the lack of information, please tell me if others needed.
> 
> Thanks
> Shawnx.
> 
> 
> ________________________________
> From: Jan Stancek <jstancek@redhat.com>
> Sent: Thursday, March 15, 2018 6:14:49 AM
> To: Xiuzhe Xiao
> Cc: Cyril Hrubis; ltp@lists.linux.it
> Subject: Re: [LTP] SIGSEGV in faccessat01 and fchmodat01
> 
> 
> ----- Original Message -----
> >
> >
> > Hi
> 
> > Here is the result from gdb
> > seems like it is getting really deep
> >
> >
> >
> > (gdb) r
> > Starting program: /opt/ltp/testcases/bin/fchmodat01
> >
> > Program received signal SIGSEGV, Segmentation fault.
> > strlen () at ../sysdeps/arm/strlen.S:33
> > 33 sfi_breg r1, \
> > (gdb)
> 
> Please send the backtrace as well. Type "bt" and hit enter in gdb
> after it crashes.
> 
> What distro/kernel/LTP version are you using?
> 
> Regards,
> Jan
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