diff options
| author | Jacob Garber <jgarber1@ualberta.ca> | 2019-05-13 17:04:00 -0600 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2019-05-15 17:54:02 +0000 |
| commit | 724c66c88fa219087f4d6a0ccce1ba1d6f93c93b (patch) | |
| tree | 1993a61bb1b9e07569aaf1d2007ff6d073e0e60f | |
| parent | 807803afa2d10cfd818d7f1585e0279f09fc1e14 (diff) | |
libpayload: ahci: Prevent memory leaks when failing on init
Free several resources when AHCI initialization fails. Note that it is
only safe to free resources when the command engine has stopped, since
otherwise they may still be used for DMA.
Found-by: Coverity CID 1260719, 1260727, 1261090, 1261098
Signed-off-by: Jacob Garber <jgarber1@ualberta.ca>
Change-Id: I6826d79338b26ff9696ab6ac9eb4c59f734687d8
Reviewed-on: https://review.coreboot.org/c/coreboot/+/32778
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: HAOUAS Elyes <ehaouas@noos.fr>
Reviewed-by: Nico Huber <nico.h@gmx.de>
| -rw-r--r-- | payloads/libpayload/drivers/storage/ahci.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/payloads/libpayload/drivers/storage/ahci.c b/payloads/libpayload/drivers/storage/ahci.c index 40e1008cf4..f74adafd75 100644 --- a/payloads/libpayload/drivers/storage/ahci.c +++ b/payloads/libpayload/drivers/storage/ahci.c @@ -108,6 +108,9 @@ static int ahci_dev_init(hba_ctrl_t *const ctrl, const int ncs = HBA_CAPS_DECODE_NCS(ctrl->caps); + if (ahci_cmdengine_stop(port)) + return 1; + /* Allocate command list, one command table and received FIS. */ cmd_t *const cmdlist = memalign(1024, ncs * sizeof(cmd_t)); cmdtable_t *const cmdtable = memalign(128, sizeof(cmdtable_t)); @@ -121,12 +124,10 @@ static int ahci_dev_init(hba_ctrl_t *const ctrl, memset((void *)rcvd_fis, '\0', sizeof(*rcvd_fis)); /* Set command list base and received FIS base. */ - if (ahci_cmdengine_stop(port)) - return 1; port->cmdlist_base = virt_to_phys(cmdlist); port->frameinfo_base = virt_to_phys(rcvd_fis); if (ahci_cmdengine_start(port)) - return 1; + goto _cleanup_ret; /* Put port into active state. */ port->cmd_stat |= HBA_PxCMD_ICC_ACTIVE; @@ -178,6 +179,8 @@ _cleanup_ret: /* Clean up (not reached for initialized devices). */ if (dev) free(dev); + /* Only free if stopping succeeds, since otherwise the controller may + still use the resources for DMA. */ if (!ahci_cmdengine_stop(port)) { port->cmdlist_base = 0; port->frameinfo_base = 0; |