fs: dlm: fix potential buffer overflow
authorAlexander Aring <aahringo@redhat.com>
Fri, 12 Nov 2021 15:08:01 +0000 (10:08 -0500)
committerDavid Teigland <teigland@redhat.com>
Fri, 12 Nov 2021 15:38:19 +0000 (09:38 -0600)
commit6a628fa43810f861da50c593c69f2ead1c829231
tree719245d47ef94ec6a23f635c948cf4992eb10f86
parentc8b9f34e223fcad1e9980f343587f38624331bbc
fs: dlm: fix potential buffer overflow

This patch fixes an potential overflow in sscanf and the maximum
declared string parsing length which seems to be excluding the null
termination symbol. This patch will just add one byte to be prepared on
a string with length of DLM_RESNAME_MAXLEN including the null
termination symbol.

Fixes: 5054e79de999 ("fs: dlm: add lkb debugfs functionality")
Reported-by: kernel test robot <lkp@intel.com>
Signed-off-by: Alexander Aring <aahringo@redhat.com>
Signed-off-by: David Teigland <teigland@redhat.com>
fs/dlm/debug_fs.c