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Only call fdclose() on successfully-opened FDs.

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Since kern_openat() now uses falloc_noinstall() and finstall() separately,
there are cases where we could get to cleanup code without ever creating
a file descriptor. In those cases, we should not call fdclose() on FD -1.

Approved by: re (kib), mentor (rwatson)
Sponsored by: Google Inc
This commit is contained in:
Jonathan Anderson 2011-08-11 13:29:59 +00:00
parent 09abcc01cf
commit d6d2cfa24b
1 changed files with 4 additions and 2 deletions
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6
sys/kern/vfs_syscalls.c
View file

@ -1116,7 +1116,8 @@ kern_openat(struct thread *td, int fd, char *path, enum uio_seg pathseg,
* Clean up the descriptor, but only if another thread hadn't
* replaced or closed it.
*/
fdclose(fdp, fp, indx, td);
if (indx != -1)
fdclose(fdp, fp, indx, td);
fdrop(fp, td);
if (error == ERESTART)
@ -1185,7 +1186,8 @@ success:
bad:
VFS_UNLOCK_GIANT(vfslocked);
bad_unlocked:
fdclose(fdp, fp, indx, td);
if (indx != -1)
fdclose(fdp, fp, indx, td);
fdrop(fp, td);
td->td_retval[0] = -1;
return (error);