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authorJoakim Tjernlund <joakim.tjernlund@infinera.com>2018-06-06 12:13:28 +0200
committerBoris Brezillon <boris.brezillon@bootlin.com>2018-06-22 00:35:31 +0200
commit5fdfc3dbad099281bf027a353d5786c09408a8e5 (patch)
tree32530a1430fc449d292f8e3f91350286a9469a71 /drivers/mtd/chips
parentf93aa8c4de307069c270b2d81741961162bead6c (diff)
downloadlinux-5fdfc3dbad099281bf027a353d5786c09408a8e5.tar.bz2
mtd: cfi_cmdset_0002: fix SEGV unlocking multiple chips
cfi_ppb_unlock() tries to relock all sectors that were locked before unlocking the whole chip. This locking used the chip start address + the FULL offset from the first flash chip, thereby forming an illegal address. Fix that by using the chip offset(adr). Fixes: 1648eaaa1575 ("mtd: cfi_cmdset_0002: Support Persistent Protection Bits (PPB) locking") Cc: stable@vger.kernel.org Signed-off-by: Joakim Tjernlund <joakim.tjernlund@infinera.com> Signed-off-by: Boris Brezillon <boris.brezillon@bootlin.com>
Diffstat (limited to 'drivers/mtd/chips')
-rw-r--r--drivers/mtd/chips/cfi_cmdset_0002.c6
1 files changed, 3 insertions, 3 deletions
diff --git a/drivers/mtd/chips/cfi_cmdset_0002.c b/drivers/mtd/chips/cfi_cmdset_0002.c
index aa09d5155429..87f9925d25f9 100644
--- a/drivers/mtd/chips/cfi_cmdset_0002.c
+++ b/drivers/mtd/chips/cfi_cmdset_0002.c
@@ -2526,7 +2526,7 @@ static int cfi_atmel_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
struct ppb_lock {
struct flchip *chip;
- loff_t offset;
+ unsigned long adr;
int locked;
};
@@ -2662,7 +2662,7 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
*/
if ((adr < ofs) || (adr >= (ofs + len))) {
sect[sectors].chip = &cfi->chips[chipnum];
- sect[sectors].offset = offset;
+ sect[sectors].adr = adr;
sect[sectors].locked = do_ppb_xxlock(
map, &cfi->chips[chipnum], adr, 0,
DO_XXLOCK_ONEBLOCK_GETLOCK);
@@ -2706,7 +2706,7 @@ static int __maybe_unused cfi_ppb_unlock(struct mtd_info *mtd, loff_t ofs,
*/
for (i = 0; i < sectors; i++) {
if (sect[i].locked)
- do_ppb_xxlock(map, sect[i].chip, sect[i].offset, 0,
+ do_ppb_xxlock(map, sect[i].chip, sect[i].adr, 0,
DO_XXLOCK_ONEBLOCK_LOCK);
}