diff options
| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-09-01 16:58:29 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-10 11:17:47 +0200 |
| commit | c7f800ec9773d02a5b26faf77f829aa263226dc2 (patch) | |
| tree | 811e01e44a2d714a077e25ff7a24411b85987151 /drivers/staging/rtl8188eu | |
| parent | 1f447e51c0b9e8beeec0917ea5f51930f55e17c9 (diff) | |
staging: rtl8188eu: Fix two sleep-in-atomic-context bugs in rtw_chk_hi_queue_cmd()
usb_write_port_complete() in usb_ops_linux.c is a completion handler
function for the USB driver. So it should not sleep, but it is can sleep
according to the function call paths (from bottom to top) in Linux-4.16:
[FUNC] kzalloc(GFP_KERNEL)
drivers/staging/rtl8188eu/core/rtw_cmd.c, 1081:
kzalloc in rtw_chk_hi_queue_cmd
drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c, 604:
rtw_chk_hi_queue_cmd in usb_write_port_complete
[FUNC] kzalloc(GFP_KERNEL)
drivers/staging/rtl8188eu/core/rtw_cmd.c, 1075:
kzalloc in rtw_chk_hi_queue_cmd
drivers/staging/rtl8188eu/os_dep/usb_ops_linux.c, 604:
rtw_chk_hi_queue_cmd in usb_write_port_complete
To fix these bugs, GFP_KERNEL is replaced with GFP_ATOMIC.
These bugs are found by my static analysis tool DSAC.
Signed-off-by: Jia-Ju Bai <baijiaju1990@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/staging/rtl8188eu')
| -rw-r--r-- | drivers/staging/rtl8188eu/core/rtw_cmd.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/drivers/staging/rtl8188eu/core/rtw_cmd.c b/drivers/staging/rtl8188eu/core/rtw_cmd.c index 59039211dad2..7f9536c55774 100644 --- a/drivers/staging/rtl8188eu/core/rtw_cmd.c +++ b/drivers/staging/rtl8188eu/core/rtw_cmd.c @@ -1064,13 +1064,13 @@ u8 rtw_chk_hi_queue_cmd(struct adapter *padapter) struct cmd_priv *pcmdpriv = &padapter->cmdpriv; u8 res = _SUCCESS; - ph2c = kzalloc(sizeof(struct cmd_obj), GFP_KERNEL); + ph2c = kzalloc(sizeof(struct cmd_obj), GFP_ATOMIC); if (!ph2c) { res = _FAIL; goto exit; } - pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_KERNEL); + pdrvextra_cmd_parm = kzalloc(sizeof(struct drvextra_cmd_parm), GFP_ATOMIC); if (!pdrvextra_cmd_parm) { kfree(ph2c); res = _FAIL; |