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| author | gonzo <gonzo@FreeBSD.org> | 2008-06-19 18:08:42 +0000 |
|---|---|---|
| committer | gonzo <gonzo@FreeBSD.org> | 2008-06-19 18:08:42 +0000 |
| commit | c5bc6314e26838a645dc67654364dc47d5e3bb98 (patch) | |
| tree | eec439d6c836832fe1d99038cca03ced7da00ae7 /sys/kern/sysv_sem.c | |
| parent | 6f4770a5ef495081f958a973e64b7d55e56aa894 (diff) | |
| download | FreeBSD-src-c5bc6314e26838a645dc67654364dc47d5e3bb98.zip FreeBSD-src-c5bc6314e26838a645dc67654364dc47d5e3bb98.tar.gz | |
Renew semaphore's pointer after wakeup since during msleep
sem_base may have been modified by destroying one of semaphores
and semptr would not be valid in this case.
PR: kern/123731
Diffstat (limited to 'sys/kern/sysv_sem.c')
| -rw-r--r-- | sys/kern/sysv_sem.c | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/sys/kern/sysv_sem.c b/sys/kern/sysv_sem.c index bea7832..80d07ba 100644 --- a/sys/kern/sysv_sem.c +++ b/sys/kern/sysv_sem.c @@ -1167,6 +1167,13 @@ semop(td, uap) } /* + * Renew the semaphore's pointer after wakeup since + * during msleep sem_base may have been modified and semptr + * is not valid any more + */ + semptr = &semakptr->u.sem_base[sopptr->sem_num]; + + /* * The semaphore is still alive. Readjust the count of * waiting processes. */ |
