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| author | Gaosheng Cui <cuigaosheng1@huawei.com> | 2022-08-22 04:29:05 +0200 |
|---|---|---|
| committer | Paul Moore <paul@paul-moore.com> | 2022-08-23 00:50:06 +0200 |
| commit | ad982c3be4e60c7d39c03f782733503cbd88fd2a (patch) | |
| tree | 8aef373f519457b05afa7f6cf105ac2646a84324 /kernel | |
| parent | Linux 6.0-rc2 (diff) | |
| download | linux-ad982c3be4e60c7d39c03f782733503cbd88fd2a.tar.xz linux-ad982c3be4e60c7d39c03f782733503cbd88fd2a.zip | |
audit: fix potential double free on error path from fsnotify_add_inode_mark
Audit_alloc_mark() assign pathname to audit_mark->path, on error path
from fsnotify_add_inode_mark(), fsnotify_put_mark will free memory
of audit_mark->path, but the caller of audit_alloc_mark will free
the pathname again, so there will be double free problem.
Fix this by resetting audit_mark->path to NULL pointer on error path
from fsnotify_add_inode_mark().
Cc: stable@vger.kernel.org
Fixes: 7b1293234084d ("fsnotify: Add group pointer in fsnotify_init_mark()")
Signed-off-by: Gaosheng Cui <cuigaosheng1@huawei.com>
Reviewed-by: Jan Kara <jack@suse.cz>
Signed-off-by: Paul Moore <paul@paul-moore.com>
Diffstat (limited to 'kernel')
| -rw-r--r-- | kernel/audit_fsnotify.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/kernel/audit_fsnotify.c b/kernel/audit_fsnotify.c index 6432a37ac1c9..c565fbf66ac8 100644 --- a/kernel/audit_fsnotify.c +++ b/kernel/audit_fsnotify.c @@ -102,6 +102,7 @@ struct audit_fsnotify_mark *audit_alloc_mark(struct audit_krule *krule, char *pa ret = fsnotify_add_inode_mark(&audit_mark->mark, inode, 0); if (ret < 0) { + audit_mark->path = NULL; fsnotify_put_mark(&audit_mark->mark); audit_mark = ERR_PTR(ret); } |