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author | Roland McGrath <roland@redhat.com> | 2005-10-30 23:02:50 (GMT) |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-31 01:37:24 (GMT) |
commit | 7f2a52555998c699a7e89f24636c909d6fc08a60 (patch) | |
tree | 98ef1254ab3e727ba3470d4eeaf064d5dcb48614 /fs/fuse | |
parent | 396dc44bcac58f464b7b23c345052e37881cccea (diff) | |
download | linux-fsl-qoriq-7f2a52555998c699a7e89f24636c909d6fc08a60.tar.xz |
[PATCH] wait4 PTRACE_ATTACH race fix
Back about a year ago when I last fiddled heavily with the do_wait code, I
was thinking too hard about the wrong thing and I now think I introduced a
bug whose inverse thought I was fixing.
Apparently noone was looking too hard over much shoulder, so as to cite my
bogus reasoning at the time. In the race condition when PTRACE_ATTACH is
about to steal a child and then the child hits a tracing event (what
my_ptrace_child checks for), the real parent does need to set its flag
noting it has some eligible live children. Otherwise a spurious ECHILD
error is possible, since the child in question is not yet on the
ptrace_children list.
Signed-off-by: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'fs/fuse')
0 files changed, 0 insertions, 0 deletions