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Christophe Leroy 5bb60ea611 powerpc/32: Fix hardlockup on vmap stack overflow 
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
2021-11-24 21:00:51 +11:00
..
alpha
Merge branch 'akpm' (patches from Andrew)
2021-11-09 10:11:53 -08:00
arc
Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-10 16:15:54 -08:00
arm
kmap_local: don't assume kmap PTEs are linear arrays in memory
2021-11-20 10:35:54 -08:00
arm64
Selftest changes:
2021-11-18 12:05:22 -08:00
csky
asm-generic: asm/syscall.h cleanup
2021-11-10 11:22:03 -08:00
h8300
Kbuild updates for v5.16
2021-11-08 09:15:45 -08:00
hexagon
hexagon: ignore vmlinux.lds
2021-11-20 10:35:54 -08:00
ia64
asm-generic: asm/syscall.h cleanup
2021-11-10 11:22:03 -08:00
m68k
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-19 09:15:58 -06:00
microblaze
asm-generic: asm/syscall.h cleanup
2021-11-10 11:22:03 -08:00
mips
Selftest changes:
2021-11-18 12:05:22 -08:00
nds32
Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-10 16:15:54 -08:00
nios2
asm-generic: asm/syscall.h cleanup
2021-11-10 11:22:03 -08:00
openrisc
Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-10 16:15:54 -08:00
parisc
parisc: Enable CONFIG_PRINTK_TIME=y in 32bit defconfig
2021-11-18 09:02:32 +01:00
powerpc
powerpc/32: Fix hardlockup on vmap stack overflow
2021-11-24 21:00:51 +11:00
riscv
RISC-V Fixes for 5.16-rc2
2021-11-19 11:40:14 -08:00
s390
s390 updates for 5.16-rc2
2021-11-20 10:55:50 -08:00
sh
arch/sh updates for 5.16
2021-11-14 11:37:49 -08:00
sparc
signal: Replace force_fatal_sig with force_exit_sig when in doubt
2021-11-19 09:15:58 -06:00
um
Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-10 16:15:54 -08:00
x86
Two X86 fixes:
2021-11-21 11:25:19 -08:00
xtensa
Merge branch 'exit-cleanups-for-v5.16' of git://git.kernel.org/pub/scm/linux/kernel/git/ebiederm/user-namespace
2021-11-10 16:15:54 -08:00
.gitignore
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Kconfig
Tracing updates for 5.16:
2021-11-01 20:05:19 -07:00