4.17-stable review patch. If anyone has any objections, please let me know.
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From: Joakim Tjernlund joakim.tjernlund@infinera.com
commit 0cd8116f172eed018907303dbff5c112690eeb91 upstream.
The "sector is in requested range" test used to determine whether sectors should be re-locked or not is done on a variable that is reset everytime we cross a chip boundary, which can lead to some blocks being re-locked while the caller expect them to be unlocked. Fix the check to make sure this cannot happen.
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 Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org
--- drivers/mtd/chips/cfi_cmdset_0002.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/drivers/mtd/chips/cfi_cmdset_0002.c +++ b/drivers/mtd/chips/cfi_cmdset_0002.c @@ -2649,7 +2649,7 @@ static int __maybe_unused cfi_ppb_unlock * sectors shall be unlocked, so lets keep their locking * status at "unlocked" (locked=0) for the final re-locking. */ - if ((adr < ofs) || (adr >= (ofs + len))) { + if ((offset < ofs) || (offset >= (ofs + len))) { sect[sectors].chip = &cfi->chips[chipnum]; sect[sectors].adr = adr; sect[sectors].locked = do_ppb_xxlock(