pstore: do not use message compression without lock

pstore_compress() uses static stream buffer for zlib-deflate which easily crashes when several concurrent threads use one shared state. Signed-off-by: Konstantin Khlebnikov <[email protected]> Signed-off-by: Tony Luck <[email protected]>
zuai · May 21, 2015 · f0e2efc · f0e2efc
1 parent e260818
commit f0e2efc
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/fs/pstore/platform.c b/fs/pstore/platform.c
@@ -299,7 +299,7 @@ static void pstore_dump(struct kmsg_dumper *dumper,
 		bool compressed;
 		size_t total_len;
 
-		if (big_oops_buf) {
+		if (big_oops_buf && is_locked) {
 			dst = big_oops_buf;
 			hsize = sprintf(dst, "%s#%d Part%u\n", why,
 							oopscount, part);