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pstore: do not use message compression without lock
author
Konstantin Khlebnikov
<khlebnikov@yandex-team.ru>
Thu, 21 May 2015 16:26:19 +0000
(09:26 -0700)
committer
Tony Luck
<tony.luck@intel.com>
Thu, 21 May 2015 16:26:19 +0000
(09:26 -0700)
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 <khlebnikov@yandex-team.ru>
Signed-off-by: Tony Luck <tony.luck@intel.com>
fs/pstore/platform.c
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diff --git
a/fs/pstore/platform.c
b/fs/pstore/platform.c
index
c4c9a10
..
de525ec
100644
(file)
--- 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);