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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2005-06-04 15:43:30 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-06-04 17:13:00 -0700 |
| commit | 778959db97c7ed8eed4025916916b17a4629ce3d (patch) | |
| tree | a1e901eac1c3d567df29cd87e76ff804b4753d83 /include/asm-s390 | |
| parent | 854715be73b221596c7127d4042e1120d4539e19 (diff) | |
| download | linux-778959db97c7ed8eed4025916916b17a4629ce3d.tar.bz2 | |
[PATCH] s390: ptrace peek and poke
The special cases of peek and poke on acrs[15] and the fpc register are not
handled correctly. A poke on acrs[15] will clobber the 4 bytes after the
access registers in the thread_info structure. That happens to be the kernel
stack pointer. A poke on the fpc with an invalid value is not caught by the
validity check. On the next context switch the broken fpc value will cause a
program check in the kernel. Improving the checks in peek and poke fixes
this.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-s390')
0 files changed, 0 insertions, 0 deletions