diff options
| author | Jia-Ju Bai <baijiaju1990@gmail.com> | 2018-09-15 10:49:28 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2018-09-18 13:29:11 +0200 |
| commit | 1c8cb89ee9f8c0785bc1437f14ad01304acd91aa (patch) | |
| tree | d273721ac17f0a6a568fabe31f0c8d7afc70f3fd /drivers/staging/rtl8723bs | |
| parent | 47bde229703f243dd33ae9d6a6daa2b43b9a9514 (diff) | |
staging: rtl8723bs: Fix a sleep-in-atomic-context bug in issue_deauth_ex()
The driver may sleep with holding a spinlock.
The function call paths (from bottom to top) in Linux-4.17 are:
[FUNC] msleep
drivers/staging/rtl8723bs/core/rtw_mlme_ext.c, 3805:
msleep in issue_deauth_ex
drivers/staging/rtl8723bs/core/rtw_mlme_ext.c, 6336:
issue_deauth_ex in disconnect_hdl
drivers/staging/rtl8723bs/core/rtw_cmd.c, 963:
disconnect_hdl in rtw_disassoc_cmd
drivers/staging/rtl8723bs/core/rtw_ioctl_set.c, 506:
rtw_disassoc_cmd in rtw_set_802_11_disassociate
drivers/staging/rtl8723bs/core/rtw_ioctl_set.c, 501:
spin_lock_bh in rtw_set_802_11_disassociate
[FUNC] msleep
drivers/staging/rtl8723bs/core/rtw_mlme_ext.c, 3805:
msleep in issue_deauth_ex
drivers/staging/rtl8723bs/core/rtw_mlme_ext.c, 6336:
issue_deauth_ex in disconnect_hdl
drivers/staging/rtl8723bs/core/rtw_cmd.c, 963:
disconnect_hdl in rtw_disassoc_cmd
drivers/staging/rtl8723bs/core/rtw_mlme.c, 2256:
rtw_disassoc_cmd in rtw_select_and_join_from_scanned_queue
drivers/staging/rtl8723bs/core/rtw_mlme.c, 2204:
spin_lock_bh in rtw_select_and_join_from_scanned_queue
To fix this bug, msleep() is replaced with mdelay().
This bug is 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/rtl8723bs')
| -rw-r--r-- | drivers/staging/rtl8723bs/core/rtw_mlme_ext.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c index 0952d15f6d40..bf055935ef65 100644 --- a/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c +++ b/drivers/staging/rtl8723bs/core/rtw_mlme_ext.c @@ -3796,7 +3796,7 @@ int issue_deauth_ex(struct adapter *padapter, u8 *da, unsigned short reason, int break; if (i < try_cnt && wait_ms > 0 && ret == _FAIL) - msleep(wait_ms); + mdelay(wait_ms); } while ((i < try_cnt) && ((ret == _FAIL) || (wait_ms == 0))); |