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Fix pathtrace for old_mmap/old_mmap_pgoff

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As these system calls have only one argument that points to the
location in memory containing actual arguments, current path tracing
implementation is incorrect.  In order to fix this, let's use recently
introduced fetch_old_mmap_args in order to get actual arguments suitable
for path matching.

* pathtrace.c [HAVE_ARCH_OLD_MMAP] <case SEN_old_mmap,
case SEN_old_mmap_pgoff>: Retrieve actual old_mmap arguments with
fetch_old_mmap_args, pass the value from the retrieved args if it's
available.
This commit is contained in:
Eugene Syromyatnikov 2018-01-17 02:38:55 +01:00 committed by Dmitry V. Levin
parent 4c34c65d97
commit d3890c53c8
1 changed files with 10 additions and 2 deletions
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12
pathtrace.c
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@ -214,10 +214,18 @@ pathtrace_match_set(struct tcb *tcp, struct path_set *set)
upathmatch(tcp, tcp->u_arg[1], set) ||
upathmatch(tcp, tcp->u_arg[3], set);
#ifdef HAVE_ARCH_OLD_MMAP
case SEN_old_mmap:
#if defined(S390)
# if defined(S390)
case SEN_old_mmap_pgoff:
#endif
# endif
{
kernel_ulong_t *args = fetch_old_mmap_args(tcp);
return args && fdmatch(tcp, args[4], set);
}
#endif /* HAVE_ARCH_OLD_MMAP */
case SEN_mmap:
case SEN_mmap_4koff:
case SEN_mmap_pgoff: