mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-17 09:14:19 +08:00
0a06ea8718
On 64-bit systems sizeof(struct ifreq) is 8 bytes larger than sizeof(struct iwreq). For GET calls, the wireless extension code copies back into userspace using sizeof(struct ifreq) but userspace and elsewhere only allocates a "struct iwreq". Thus, this copy writes past the end of the iwreq object and corrupts whatever sits after it in memory. Fix the copy_to_user() length. This particularly hurts the compat case because the wireless compat code uses compat_alloc_userspace() and right after this allocated buffer is the current bottom of the user stack, and that's what gets overwritten by the copy_to_user() call. Signed-off-by: David S. Miller <davem@davemloft.net> |
||
|---|---|---|
| .. | ||
| core.c | ||
| core.h | ||
| Kconfig | ||
| Makefile | ||
| nl80211.c | ||
| nl80211.h | ||
| radiotap.c | ||
| sysfs.c | ||
| sysfs.h | ||
| wext.c | ||