Messages in this thread Patch in this message | | | Date | Thu, 28 Jun 2012 17:45:46 +0300 | From | Shmulik Ladkani <> | Subject | [PATCH] ubi: fastmap: Do not free 'ai' in 'scan_all()' |
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From: Shmulik Ladkani <shmulik.ladkani@gmail.com>
Do not call 'destroy_ai(ai)' at error handling of 'scan_all', since: - 'ai' is allocated in 'ubi_attach' (the caller of scan_all) and provided as an argument. It's not scan_all's responsibility to free it - It is not consistent with scan_all's sister function 'ubi_attach_fastmap()' which does not free the given 'ai' - It will cause a double free as 'ubi_attach' (the caller of scan_all) already destroys 'ai' in case of an error
Signed-off-by: Shmulik Ladkani <shmulik.ladkani@gmail.com> --- - compile tested
diff --git a/drivers/mtd/ubi/attach.c b/drivers/mtd/ubi/attach.c index 019fbd3..8a339e4 100644 --- a/drivers/mtd/ubi/attach.c +++ b/drivers/mtd/ubi/attach.c @@ -1152,11 +1152,11 @@ static int scan_all(struct ubi_device *ubi, struct ubi_attach_info *ai) sizeof(struct ubi_ainf_peb), 0, 0, NULL); if (!ai->aeb_slab_cache) - goto out_ai; + return -ENOMEM; ech = kzalloc(ubi->ec_hdr_alsize, GFP_KERNEL); if (!ech) - goto out_ai; + return -ENOMEM; vidh = ubi_zalloc_vid_hdr(ubi, GFP_KERNEL); if (!vidh) @@ -1218,8 +1218,6 @@ out_vidh: ubi_free_vid_hdr(ubi, vidh); out_ech: kfree(ech); -out_ai: - destroy_ai(ai); return err; }
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