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pathtrace: fix fanotify_mark path tracing on 32-bit architectures

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The fanotify_mark syscall takes a 64-bit mask, and on 32-bit
architectures it is split up into two syscall arguments.

* pathtrace.c (pathtrace_match_set): Use getllval to properly decode
arguments after mask.
This commit is contained in:
Nikolay Marchuk 2017-07-23 11:44:36 +07:00 committed by Dmitry V. Levin
parent 725e0fdd1d
commit f996207331
1 changed files with 7 additions and 4 deletions

11
pathtrace.c

@ -241,10 +241,13 @@ pathtrace_match_set(struct tcb *tcp, struct path_set *set)
case SEN_fanotify_mark: case SEN_fanotify_mark:
/* x, x, x, fd, path */ {
return fdmatch(tcp, tcp->u_arg[3], set) || /* x, x, mask (64 bit), fd, path */
upathmatch(tcp, tcp->u_arg[4], set); unsigned long long mask = 0;
int argn = getllval(tcp, &mask, 2);
return fdmatch(tcp, tcp->u_arg[argn], set) ||
upathmatch(tcp, tcp->u_arg[argn + 1], set);
}
case SEN_oldselect: case SEN_oldselect:
case SEN_pselect6: case SEN_pselect6:
case SEN_select: case SEN_select: