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author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-04-30 00:52:51 -0700 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-04-30 08:29:35 -0700 |
commit | 08d2c30ce98d274137f12b0a9b9c74137455922c (patch) | |
tree | cc649fd249aef0c4d227406b17a1a75c9d327e50 /kernel/fork.c | |
parent | 3547ff3aefbe092ca35506c60c02e2d17a4f2199 (diff) | |
download | linux-08d2c30ce98d274137f12b0a9b9c74137455922c.tar.gz linux-08d2c30ce98d274137f12b0a9b9c74137455922c.tar.bz2 linux-08d2c30ce98d274137f12b0a9b9c74137455922c.zip |
signals: send_sig_info: don't take tasklist_lock
The comment in send_sig_info() is wrong, tasklist_lock can't help.
The caller must ensure the task can't go away, otherwise ->sighand can be NULL
even before we take the lock.
p->sighand could be changed by exec(), but I can't imagine how it is possible
to prevent exit(), but not exec().
Since the things seem to work, I assume all callers are correct. However,
drm_vbl_send_signals() looks broken. block_all_signals() which is solely used
by drm is definitely broken.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Roland McGrath <roland@redhat.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/fork.c')
0 files changed, 0 insertions, 0 deletions