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Check (locked) before performing an advisory unlock following a failure

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of vn_start_write().  Otherwise, we may inconsistently attempt to release
the advisory lock.

Pointed out by:	teggej
This commit is contained in:
Robert Watson 2003-10-25 16:43:50 +00:00
parent c447f5b2f4
commit 36bbf86ba6
1 changed files with 2 additions and 1 deletions
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3
sys/kern/kern_sig.c
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@ -2579,7 +2579,8 @@ restart:
if (vn_start_write(vp, &mp, V_NOWAIT) != 0) {
lf.l_type = F_UNLCK;
VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK);
if (locked)
VOP_ADVLOCK(vp, (caddr_t)p, F_UNLCK, &lf, F_FLOCK);
if ((error = vn_close(vp, FWRITE, cred, td)) != 0)
return (error);
if ((error = vn_start_write(NULL, &mp, V_XSLEEP | PCATCH)) != 0)