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| author | Don Lewis <truckman@FreeBSD.org> | 2002-10-03 02:13:00 +0000 |
|---|---|---|
| committer | Don Lewis <truckman@FreeBSD.org> | 2002-10-03 02:13:00 +0000 |
| commit | 91e97a8266d38eb58a566fef3ea7c2353b20fd37 (patch) | |
| tree | a99f59036961904f8470031c60cd1319fed1c7b9 /sys/kern/sys_socket.c | |
| parent | 5da2b58aeb4d5bc16b135ed4bea93e94dd900422 (diff) | |
| download | src-91e97a8266d38eb58a566fef3ea7c2353b20fd37.tar.gz src-91e97a8266d38eb58a566fef3ea7c2353b20fd37.zip | |
In an SMP environment post-Giant it is no longer safe to blindly
dereference the struct sigio pointer without any locking. Change
fgetown() to take a reference to the pointer instead of a copy of the
pointer and call SIGIO_LOCK() before copying the pointer and
dereferencing it.
Reviewed by: rwatson
Notes
Notes:
svn path=/head/; revision=104393
Diffstat (limited to 'sys/kern/sys_socket.c')
| -rw-r--r-- | sys/kern/sys_socket.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/sys/kern/sys_socket.c b/sys/kern/sys_socket.c index b4a9442c697b..46e8384fe2cf 100644 --- a/sys/kern/sys_socket.c +++ b/sys/kern/sys_socket.c @@ -131,14 +131,14 @@ soo_ioctl(fp, cmd, data, active_cred, td) return (fsetown(*(int *)data, &so->so_sigio)); case FIOGETOWN: - *(int *)data = fgetown(so->so_sigio); + *(int *)data = fgetown(&so->so_sigio); return (0); case SIOCSPGRP: return (fsetown(-(*(int *)data), &so->so_sigio)); case SIOCGPGRP: - *(int *)data = -fgetown(so->so_sigio); + *(int *)data = -fgetown(&so->so_sigio); return (0); case SIOCATMARK: |