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| author | Christophe Leroy <[email protected]> | 2021-11-18 09:39:53 +0000 |
|---|---|---|
| committer | Michael Ellerman <[email protected]> | 2021-11-24 10:00:51 +0000 |
| commit | 5bb60ea611db1e04814426ed4bd1c95d1487678e (patch) | |
| tree | 8a1bc89c719e21697f25570aae04bf9fc98c98c2 /tools/perf/scripts/python/libxed.py | |
| parent | KVM: PPC: Book3S HV: Prevent POWER7/8 TLB flush flushing SLB (diff) | |
| download | kernel-5bb60ea611db1e04814426ed4bd1c95d1487678e.tar.gz kernel-5bb60ea611db1e04814426ed4bd1c95d1487678e.zip | |
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: [email protected] # v5.10+
Signed-off-by: Christophe Leroy <[email protected]>
Signed-off-by: Michael Ellerman <[email protected]>
Link: https://lore.kernel.org/r/ce30364fb7ccda489272af4a1612b6aa147e1d23.1637227521.git.christophe.leroy@csgroup.eu
Diffstat (limited to 'tools/perf/scripts/python/libxed.py')
0 files changed, 0 insertions, 0 deletions