9e81eccf19
This patch fixes a double free corruption in __cfg80211_scan_done: ================================================ BUG kmalloc-512: Object already free ------------------------------------------------ INFO: Allocated in load_elf_binary+0x18b/0x19af age=6 INFO: Freed in load_elf_binary+0x104e/0x19af age=5 INFO: Slab 0xffffea0001bae4c0 objects=14 used=7 INFO: Object 0xffff88007e8a9918 @offset=6424 fp=0xffff88007e8a9488 Bytes b4 0xffff88007e8a9908: 00 00 00 00 00 00 00 00 5a 5a [...] Pid: 28705, comm: rmmod Tainted: P C 2.6.31-rc2-wl #1 Call Trace: [<ffffffff810da9f4>] print_trailer+0x14e/0x16e [<ffffffff810daa56>] object_err+0x42/0x61 [<ffffffff810dbcd9>] __slab_free+0x2af/0x396 [<ffffffffa0ec9694>] ? wiphy_unregister+0x92/0x142 [cfg80211] [<ffffffff810dd5e3>] kfree+0x13c/0x17a [<ffffffffa0ec9694>] ? wiphy_unregister+0x92/0x142 [cfg80211] [<ffffffffa0ec9694>] wiphy_unregister+0x92/0x142 [cfg80211] [<ffffffffa0eed163>] ieee80211_unregister_hw+0xc8/0xff [mac80211] [<ffffffffa0f3fbc8>] p54_unregister_common+0x31/0x66 [p54common] [...] FIX kmalloc-512: Object at 0xffff88007e8a9918 not freed The code path which leads to the *funny* double free: request = rdev->scan_req; dev = dev_get_by_index(&init_net, request->ifidx); /* * the driver was unloaded recently and * therefore dev_get_by_index will return NULL! */ if (!dev) goto out; [...] rdev->scan_req = NULL; /* not executed... */ [...] out: kfree(request); Signed-off-by: Christian Lamparter <chunkeey@web.de> Signed-off-by: John W. Linville <linville@tuxdriver.com> |
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| .. | ||
| core.c | ||
| core.h | ||
| debugfs.c | ||
| debugfs.h | ||
| ibss.c | ||
| Kconfig | ||
| lib80211_crypt_ccmp.c | ||
| lib80211_crypt_tkip.c | ||
| lib80211_crypt_wep.c | ||
| lib80211.c | ||
| Makefile | ||
| mlme.c | ||
| nl80211.c | ||
| nl80211.h | ||
| radiotap.c | ||
| reg.c | ||
| reg.h | ||
| scan.c | ||
| sysfs.c | ||
| sysfs.h | ||
| util.c | ||
| wext-compat.c | ||
| wext.c | ||