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| author | Christophe Leroy <christophe.leroy@csgroup.eu> | 2021-11-18 12:39:53 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-12-01 11:19:01 +0300 |
| commit | dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7 (patch) | |
| tree | 30858608582ac1372516c99982cc35daef029f65 /mm | |
| parent | bf00edd9e6c9d6f19bb3f7501de97e94e9a74b32 (diff) | |
| download | linux-dfe906da9a1abebdebe8b15bb3e66a2578f6c4c7.tar.xz | |
powerpc/32: Fix hardlockup on vmap stack overflow
commit 5bb60ea611db1e04814426ed4bd1c95d1487678e upstream.
Since the commit c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not
activate MMU before reading task struct") a vmap stack overflow
results in a hard lockup. This is because emergency_ctx is still
addressed with its virtual address allthough data MMU is not active
anymore at that time.
Fix it by using a physical address instead.
Fixes: c118c7303ad5 ("powerpc/32: Fix vmap stack - Do not activate MMU before reading task struct")
Cc: stable@vger.kernel.org # v5.10+
Signed-off-by: Christophe Leroy <christophe.leroy@csgroup.eu>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/ce30364fb7ccda489272af4a1612b6aa147e1d23.1637227521.git.christophe.leroy@csgroup.eu
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions