diff options
| author | Stratos Psomadakis <psomas@gentoo.org> | 2011-12-04 02:23:54 +0200 |
|---|---|---|
| committer | Willy Tarreau <w@1wt.eu> | 2012-02-11 15:38:32 +0100 |
| commit | 64494d9f150b905efc2a9112e1cb3777f7fcabba (patch) | |
| tree | a911f3bfbcf6b2205d61693f61188d9de71478fd | |
| parent | e9a7f3230d9ac4824c4692aa0b9b7bd6ad1667c5 (diff) | |
sym53c8xx: Fix NULL pointer dereference in slave_destroy
commit cced5041ed5a2d1352186510944b0ddfbdbe4c0b upstream.
sym53c8xx_slave_destroy unconditionally assumes that sym53c8xx_slave_alloc has
succesesfully allocated a sym_lcb. This can lead to a NULL pointer dereference
(exposed by commit 4e6c82b).
Signed-off-by: Stratos Psomadakis <psomas@gentoo.org>
Signed-off-by: James Bottomley <JBottomley@Parallels.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Signed-off-by: Willy Tarreau <w@1wt.eu>
| -rw-r--r-- | drivers/scsi/sym53c8xx_2/sym_glue.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/scsi/sym53c8xx_2/sym_glue.c b/drivers/scsi/sym53c8xx_2/sym_glue.c index d39107b7669b..8dfc3853fd49 100644 --- a/drivers/scsi/sym53c8xx_2/sym_glue.c +++ b/drivers/scsi/sym53c8xx_2/sym_glue.c @@ -821,6 +821,10 @@ static void sym53c8xx_slave_destroy(struct scsi_device *sdev) struct sym_hcb *np = sym_get_hcb(sdev->host); struct sym_lcb *lp = sym_lp(&np->target[sdev->id], sdev->lun); + /* if slave_alloc returned before allocating a sym_lcb, return */ + if (!lp) + return; + if (lp->itlq_tbl) sym_mfree_dma(lp->itlq_tbl, SYM_CONF_MAX_TASK * 4, "ITLQ_TBL"); kfree(lp->cb_tags); |