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-rw-r--r--archival/rpm.c8
1 files changed, 5 insertions, 3 deletions
diff --git a/archival/rpm.c b/archival/rpm.c
index b506f1779..86ba4dca4 100644
--- a/archival/rpm.c
+++ b/archival/rpm.c
@@ -305,16 +305,17 @@ int rpm_main(int argc, char **argv)
while (*argv) {
int rpm_fd;
- unsigned offset;
+ unsigned mapsize;
const char *source_rpm;
rpm_fd = xopen(*argv++, O_RDONLY);
G.mytags = rpm_gettags(rpm_fd, &G.tagcount);
if (!G.mytags)
bb_error_msg_and_die("error reading rpm header");
- offset = xlseek(rpm_fd, 0, SEEK_CUR);
+ mapsize = xlseek(rpm_fd, 0, SEEK_CUR);
+ mapsize = (mapsize + pagesize) & -(int)pagesize;
/* Some NOMMU systems prefer MAP_PRIVATE over MAP_SHARED */
- G.map = mmap(0, (offset + pagesize) & (-(int)pagesize), PROT_READ, MAP_PRIVATE, rpm_fd, 0);
+ G.map = mmap(0, mapsize, PROT_READ, MAP_PRIVATE, rpm_fd, 0);
//FIXME: error check?
source_rpm = rpm_getstr(TAG_SOURCERPM, 0);
@@ -386,6 +387,7 @@ int rpm_main(int argc, char **argv)
}
}
}
+ munmap(G.map, mapsize);
free(G.mytags);
close(rpm_fd);
}