tree 13e249da75a0667e2c9d195e9c125fb14d721e71
parent 5528f9132cf65d4d892bcbc5684c61e7822b21e9
author Linus Torvalds <torvalds@linux-foundation.org> 1281718160 -0700
committer Linus Torvalds <torvalds@linux-foundation.org> 1281718160 -0700

x86: don't send SIGBUS for kernel page faults

It's wrong for several reasons, but the most direct one is that the
fault may be for the stack accesses to set up a previous SIGBUS.  When
we have a kernel exception, the kernel exception handler does all the
fixups, not some user-level signal handler.

Even apart from the nested SIGBUS issue, it's also wrong to give out
kernel fault addresses in the signal handler info block, or to send a
SIGBUS when a system call already returns EFAULT.

Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>