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Blackfin: don't walk VMAs when oopsing

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If we're double faulting, then we have to assume the VMAs are not safe as
broken pointers here will prevent full trace output for the double fault.
Shouldn't be a big problem though as rarely is a double fault caused by
code in userspace.

Signed-off-by: Robin Getz <robin.getz@analog.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
This commit is contained in:
Robin Getz 2009-11-05 15:44:44 +00:00 • committed by Mike Frysinger
commit dbc5e6989e
1 changed files with 9 additions and 0 deletions
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9
arch/blackfin/kernel/traps.c
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@ -119,6 +119,15 @@ static void decode_address(char *buf, unsigned long address)
return;
}
/*
* Don't walk any of the vmas if we are oopsing, it has been known
* to cause problems - corrupt vmas (kernel crashes) cause double faults
*/
if (oops_in_progress) {
strcat(buf, "/* kernel dynamic memory (maybe user-space) */");
return;
}
/* looks like we're off in user-land, so let's walk all the
* mappings of all our processes and see if we can't be a whee
* bit more specific