diff options
| author | Michał Kępień <kernel@kempniu.pl> | 2022-06-29 15:57:35 +0300 |
|---|---|---|
| committer | Miquel Raynal <miquel.raynal@bootlin.com> | 2022-09-21 11:38:07 +0300 |
| commit | 745df17906029cc683b8b5ac8bcb08f82860baff (patch) | |
| tree | 7880199cc6c84d6715d0b6979fe7bdf5cc8cc576 /drivers/mtd/mtdswap.c | |
| parent | 65394169bdae073bfb2c6816f5bf095bd7d53e61 (diff) | |
| download | linux-745df17906029cc683b8b5ac8bcb08f82860baff.tar.xz | |
mtd: always initialize 'stats' in struct mtd_oob_ops
As the 'stats' field in struct mtd_oob_ops is used in conditional
expressions, ensure it is always zero-initialized in all such structures
to prevent random stack garbage from being interpreted as a pointer.
Strictly speaking, this problem currently only needs to be fixed for
struct mtd_oob_ops structures subsequently passed to mtd_read_oob().
However, this commit goes a step further and makes all instances of
struct mtd_oob_ops in the tree zero-initialized, in hope of preventing
future problems, e.g. if struct mtd_req_stats gets extended with write
statistics at some point.
Signed-off-by: Michał Kępień <kernel@kempniu.pl>
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://lore.kernel.org/linux-mtd/20220629125737.14418-3-kernel@kempniu.pl
Diffstat (limited to 'drivers/mtd/mtdswap.c')
| -rw-r--r-- | drivers/mtd/mtdswap.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/mtdswap.c b/drivers/mtd/mtdswap.c index dc7f1532a37f..680366616da2 100644 --- a/drivers/mtd/mtdswap.c +++ b/drivers/mtd/mtdswap.c @@ -323,7 +323,7 @@ static int mtdswap_read_markers(struct mtdswap_dev *d, struct swap_eb *eb) struct mtdswap_oobdata *data, *data2; int ret; loff_t offset; - struct mtd_oob_ops ops; + struct mtd_oob_ops ops = { }; offset = mtdswap_eb_offset(d, eb); @@ -370,7 +370,7 @@ static int mtdswap_write_marker(struct mtdswap_dev *d, struct swap_eb *eb, struct mtdswap_oobdata n; int ret; loff_t offset; - struct mtd_oob_ops ops; + struct mtd_oob_ops ops = { }; ops.ooboffs = 0; ops.oobbuf = (uint8_t *)&n; @@ -878,7 +878,7 @@ static unsigned int mtdswap_eblk_passes(struct mtdswap_dev *d, loff_t base, pos; unsigned int *p1 = (unsigned int *)d->page_buf; unsigned char *p2 = (unsigned char *)d->oob_buf; - struct mtd_oob_ops ops; + struct mtd_oob_ops ops = { }; int ret; ops.mode = MTD_OPS_AUTO_OOB; |