diff options
| author | Joakim Tjernlund <joakim.tjernlund@infinera.com> | 2018-06-06 12:13:28 +0200 |
|---|---|---|
| committer | Boris Brezillon <boris.brezillon@bootlin.com> | 2018-06-22 00:35:31 +0200 |
| commit | 5fdfc3dbad099281bf027a353d5786c09408a8e5 (patch) | |
| tree | 32530a1430fc449d292f8e3f91350286a9469a71 /drivers/mtd/chips | |
| parent | f93aa8c4de307069c270b2d81741961162bead6c (diff) | |
| download | linux-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.c | 6 |
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); } |