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In r340044 an attempt to quiet coverity warning cid 1357336

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was incorrectly implemented leading to a possible double free.

It is possible for both the conditional free,
and the unconditional free added in r340044 to be done,
fix that by initializing uopt to NULL,
removing the conditional free,
and only using the unconditional free at the end.

Reported by:	Patrick Mooney (patrick.mooney@joyent.com)
Reviewed by:	jhb (maintainer), Patrick Mooney (joyent/illumos)
Approved by:	bde (mentor)
CID:		1357336
MFC after:	3 days
MFC with:	340044
Differential Revision:	https://reviews.freebsd.org/D19202
This commit is contained in:
Rodney W. Grimes 2019-02-15 16:48:15 +00:00
parent 85cf19adc5
commit 11e67b92b5
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=344160
1 changed files with 1 additions and 2 deletions
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3
usr.sbin/bhyve/pci_xhci.c
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@ -2626,6 +2626,7 @@ pci_xhci_parse_opts(struct pci_xhci_softc *sc, char *opts)
char *uopt, *xopts, *config;
int usb3_port, usb2_port, i;
uopt = NULL;
usb3_port = sc->usb3_port_start - 1;
usb2_port = sc->usb2_port_start - 1;
devices = NULL;
@ -2700,8 +2701,6 @@ pci_xhci_parse_opts(struct pci_xhci_softc *sc, char *opts)
sc->ndevices++;
}
if (uopt != NULL)
free(uopt);
portsfinal:
sc->portregs = calloc(XHCI_MAX_DEVS, sizeof(struct pci_xhci_portregs));