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author | Steven Rostedt <rostedt@goodmis.org> | 2007-06-06 23:34:04 -0400 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-06-07 17:05:03 -0700 |
commit | e5e3c84b70e58fc605635fd340fb8dba3cc59058 (patch) | |
tree | 7ebba42dc0a402ef54bcbd4552e1fe47c519de2b /include/net/genetlink.h | |
parent | c52ecdab06ff3b4d0f8914951eb74dc8b049f51c (diff) | |
download | op-kernel-dev-e5e3c84b70e58fc605635fd340fb8dba3cc59058.zip op-kernel-dev-e5e3c84b70e58fc605635fd340fb8dba3cc59058.tar.gz |
enable interrupts in user path of page fault.
This is a minor fix, but what is currently there is essentially wrong.
In do_page_fault, if the faulting address from user code happens to be
in kernel address space (int *p = (int*)-1; p = 0xbed;) then the
do_page_fault handler will jump over the local_irq_enable with the
goto bad_area_nosemaphore;
But the first line there sees this is user code and goes through the
process of sending a signal to send SIGSEGV to the user task. This whole
time interrupts are disabled and the task can not be preempted by a
higher priority task.
This patch always enables interrupts in the user path of the
bad_area_nosemaphore.
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'include/net/genetlink.h')
0 files changed, 0 insertions, 0 deletions