shaba/lvm2
1
0
Fork 0
mirror of git://sourceware.org/git/lvm2.git synced 2025-08-04 12:22:00 +03:00
Code Releases Activity

dev-cache: fix mem corruption on refresh context

Browse Source 
When lvm2 command works with clvmd and uses locking in wrong way,
it may 'leak' certain file descriptors in opened (incorrect) state.

dev_cache_exit then destroys memory pool of cached devices, while
_open_devices list in dev-io.c was still referencing them if they
were still opened.

Patch properly calls _close() function to 'self-heal' from this
invalid state, but it will report internal error (so execution
with abort_on_internal_error causes immediate death). On the
normal 'execution', error is only reported, but memory state is
corrected, and linked list is not referencing devices from
released mempool.

For crash see: https://bugzilla.redhat.com/show_bug.cgi?id=1073886
This commit is contained in:
Zdenek Kabelac
2014-03-25 10:53:42 +01:00
parent d29fe919e6
commit 68d13b2517
4 changed files with 31 additions and 9 deletions
Download Patch File Download Diff File Expand all files Collapse all files

3
lib/device/dev-cache.h
View File

@ -36,7 +36,8 @@ struct dev_filter {
*/
struct cmd_context;
int dev_cache_init(struct cmd_context *cmd);
void dev_cache_exit(void);
int dev_cache_check_for_open_devices(void);
int dev_cache_exit(void);
/* Trigger(1) or avoid(0) a scan */
void dev_cache_scan(int do_scan);