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| author | Gabor Juhos <juhosg@freemail.hu> | 2017-12-13 20:31:50 +0100 |
|---|---|---|
| committer | John Crispin <john@phrozen.org> | 2017-12-15 23:57:41 +0100 |
| commit | 2ecc4131077b26ed8b95b88dea870b1f3a9444c2 (patch) | |
| tree | c1470be1b05f52ae559b159f9908ff551dbd0dc8 /target | |
| parent | c13b4ef2c8a796fb1d1fb95e2ab5185a69479b22 (diff) | |
| download | upstream-2ecc4131077b26ed8b95b88dea870b1f3a9444c2.tar.gz upstream-2ecc4131077b26ed8b95b88dea870b1f3a9444c2.tar.bz2 upstream-2ecc4131077b26ed8b95b88dea870b1f3a9444c2.zip | |
ar71xx: fix invalid pointer dereference in c60_nand_scan_fixup()
Since Linux 4.6, mtd->priv no longer points to the NAND specific
structure. Under 4.9 it contains NULL, thus using it to access
the fields of the nand_chip structure causes an invalid pointer
dereference.
Update the code to use the mtd_to_nand() helper under 4.9 to obtain
the address of the chip specific data.
Compile tested only.
Fixes: 7bbf4117c6fe ("ar71xx: Add kernel 4.9 support")
Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
Tested-by: Christian Lamparter <chunkeey@gmail.com>
Diffstat (limited to 'target')
| -rw-r--r-- | target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c b/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c index 7b01af515b..144f5db740 100644 --- a/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c +++ b/target/linux/ar71xx/files/arch/mips/ath79/mach-c60.c @@ -180,7 +180,11 @@ static const struct mtd_ooblayout_ops c60_nand_ecclayout_ops = { static int c60_nand_scan_fixup(struct mtd_info *mtd) { +#if LINUX_VERSION_CODE < KERNEL_VERSION(4,6,0) struct nand_chip *chip = mtd->priv; +#else + struct nand_chip *chip = mtd_to_nand(mtd); +#endif chip->ecc.size = 512; chip->ecc.strength = 4; |