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| author | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-02 16:02:06 +0300 |
|---|---|---|
| committer | Michael Ellerman <mpe@ellerman.id.au> | 2021-02-08 17:10:16 +0300 |
| commit | 0ecf6a9e47d825b7dddfebca738386b809e59a94 (patch) | |
| tree | e3074c3b0caa3e00e4f053caf4879296702319ca /scripts/gdb/linux/utils.py | |
| parent | 73287caa9210ded6066833195f4335f7f688a46b (diff) | |
| download | linux-0ecf6a9e47d825b7dddfebca738386b809e59a94.tar.xz | |
powerpc/64: Make stack tracing work during very early boot
If we try to stack trace very early during boot, either due to a
WARN/BUG or manual dump_stack(), we will oops in
valid_emergency_stack() when we try to dereference the paca_ptrs
array.
The fix is simple, we just return false if paca_ptrs isn't allocated
yet. The stack pointer definitely isn't part of any emergency stack
because we haven't allocated any yet.
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/20210202130207.1303975-1-mpe@ellerman.id.au
Diffstat (limited to 'scripts/gdb/linux/utils.py')
0 files changed, 0 insertions, 0 deletions