[lkml]   [2004]   [Jun]   [27]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: 2.6.x signal handler bug
On Sat, Jun 26, 2004 at 09:05:34AM -0700, Davide Libenzi wrote:

> You're receiving a SIGSEGV while SIGSEGV is blocked (force_sig_info). The
> force_sig_info call wants to send a signal that the task can't refuse
> (kinda The GodFather offers ;). The kernel will noticed this and will
> restore the handler to SIG_DFL.


So checking whether this is POSIX conforming:

- Blocking a signal in its signal handler is explicitly allowed.
- It is unspecified what longjmp() does with the signal mask.
- The SIGSEGV that occurs during a stack overflow is of the GodFather kind.
- If SIGSEGV is generated while blocked, the result is undefined

So, maybe the restoring to SIG_DFL was not required, but it doesnt seem
incorrect either. It may be a bit surprising.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

 \ /
  Last update: 2005-03-22 14:04    [W:0.052 / U:11.316 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site