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Message-Id: <1451414709-8581-1-git-send-email-wuninsu@gmail.com> Date: Tue, 29 Dec 2015 13:45:09 -0500 From: Insu Yun <wuninsu@...il.com> To: dwmw2@...radead.org, computersforpeace@...il.com, linux-mtd@...ts.infradead.org, linux-kernel@...r.kernel.org Cc: taesoo@...ech.edu, yeongjin.jang@...ech.edu, insu@...ech.edu, changwoo@...ech.edu, Insu Yun <wuninsu@...il.com> Subject: [PATCH] mtd: fixing memory leak and handling failed kmalloc kmalloc needs to be handled when failing in memory pressure. Also, it has memory leak in error routine. Signed-off-by: Insu Yun <wuninsu@...il.com> --- drivers/mtd/chips/cfi_cmdset_0001.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) diff --git a/drivers/mtd/chips/cfi_cmdset_0001.c b/drivers/mtd/chips/cfi_cmdset_0001.c index 286b97a..5e1b68c 100644 --- a/drivers/mtd/chips/cfi_cmdset_0001.c +++ b/drivers/mtd/chips/cfi_cmdset_0001.c @@ -596,7 +596,7 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) mtd->size = devsize * cfi->numchips; mtd->numeraseregions = cfi->cfiq->NumEraseRegions * cfi->numchips; - mtd->eraseregions = kmalloc(sizeof(struct mtd_erase_region_info) + mtd->eraseregions = kzalloc(sizeof(struct mtd_erase_region_info) * mtd->numeraseregions, GFP_KERNEL); if (!mtd->eraseregions) goto setup_err; @@ -614,6 +614,8 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].erasesize = ersize; mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].numblocks = ernum; mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap = kmalloc(ernum / 8 + 1, GFP_KERNEL); + if (!mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap) + goto setup_err; } offset += (ersize * ernum); } @@ -650,6 +652,10 @@ static struct mtd_info *cfi_intelext_setup(struct mtd_info *mtd) return mtd; setup_err: + if (mtd->eraseregions) + for (i=0; i<cfi->cfiq->NumEraseRegions; i++) + for (j=0; j<cfi->numchips; j++) + kfree(mtd->eraseregions[(j*cfi->cfiq->NumEraseRegions)+i].lockmap); kfree(mtd->eraseregions); kfree(mtd); kfree(cfi->cmdset_priv); -- 1.9.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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