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libalpm: check filecache_find return and log errors

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Some user had erros while updating their system.

:: Proceed with installation? [Y/n]
:: Retrieving packages...
checking keyring...
checking package integrity...
error: failed to commit transaction (invalid or corrupted package)
Errors occurred, no packages were upgraded.

The issue was filecache_find returning null and alpm passing that null
path to check validity. How this happened I have no idea. It may be
something to do with the user's cachedir being a network drive.

Also warn when the file exists but it is not a regular file or can not
be opened.
This commit is contained in:
morganamilo 2021-09-27 18:30:17 +01:00
parent 39c3cbdf56
commit c7c88f880a
No known key found for this signature in database
GPG key ID: E48D0A8326DE47C5
2 changed files with 24 additions and 4 deletions
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13
lib/libalpm/sync.c
View file

@ -991,6 +991,13 @@ static int check_validity(alpm_handle_t *handle,
current_bytes += v.pkg->size;
v.path = _alpm_filecache_find(handle, v.pkg->filename);
if(!v.path) {
_alpm_log(handle, ALPM_LOG_ERROR,
_("%s: could not find package in cache\n"), v.pkg->name);
RET_ERR(handle, ALPM_ERR_PKG_NOT_FOUND, -1);
}
v.siglevel = alpm_db_get_siglevel(alpm_pkg_get_db(v.pkg));
if(_alpm_pkg_validate_internal(handle, v.path, v.pkg,
@ -1082,6 +1089,12 @@ static int load_packages(alpm_handle_t *handle, alpm_list_t **data,
current_bytes += spkg->size;
filepath = _alpm_filecache_find(handle, spkg->filename);
if(!filepath) {
_alpm_log(handle, ALPM_LOG_ERROR,
_("%s: could not find package in cache\n"), spkg->name);
RET_ERR(handle, ALPM_ERR_PKG_NOT_FOUND, -1);
}
/* load the package file and replace pkgcache entry with it in the target list */
/* TODO: alpm_pkg_get_db() will not work on this target anymore */
_alpm_log(handle, ALPM_LOG_DEBUG,

9
lib/libalpm/util.c
View file

@ -831,10 +831,17 @@ char *_alpm_filecache_find(alpm_handle_t *handle, const char *filename)
for(i = handle->cachedirs; i; i = i->next) {
snprintf(path, PATH_MAX, "%s%s", (char *)i->data,
filename);
if(stat(path, &buf) == 0 && S_ISREG(buf.st_mode)) {
if(stat(path, &buf) == 0) {
if(S_ISREG(buf.st_mode)) {
retpath = strdup(path);
_alpm_log(handle, ALPM_LOG_DEBUG, "found cached pkg: %s\n", retpath);
return retpath;
} else {
_alpm_log(handle, ALPM_LOG_WARNING,
"cached pkg '%s' is not a regular file: mode=%i\n", path, buf.st_mode);
}
} else if(errno != ENOENT) {
_alpm_log(handle, ALPM_LOG_WARNING, "could not open '%s'\n: %s", path, strerror(errno));
}
}
/* package wasn't found in any cachedir */