ARM: 9430/1: entry: Do a dummy read from VMAP shadow

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commit 44e9a3bb76 upstream.

When switching task, in addition to a dummy read from the new
VMAP stack, also do a dummy read from the VMAP stack's
corresponding KASAN shadow memory to sync things up in
the new MM context.

Cc: stable@vger.kernel.org
Fixes: a1c510d0ad ("ARM: implement support for vmap'ed stacks")
Link: https://lore.kernel.org/linux-arm-kernel/a1a1d062-f3a2-4d05-9836-3b098de9db6d@foss.st.com/
Reported-by: Clement LE GOFFIC <clement.legoffic@foss.st.com>
Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

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Linus Walleij 2024-10-23 13:04:44 +01:00 • committed by Greg Kroah-Hartman

parent 5bb7a2c3af

commit 8fe148d39c

1 changed files with 8 additions and 0 deletions

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arch/arm/kernel/entry-armv.S

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