diff options
Diffstat (limited to 'package/kernel/mac80211/patches/322-brcmfmac-only-call-brcmf_cfg80211_detach-when-attach.patch')
| -rw-r--r-- | package/kernel/mac80211/patches/322-brcmfmac-only-call-brcmf_cfg80211_detach-when-attach.patch | 92 |
1 files changed, 92 insertions, 0 deletions
diff --git a/package/kernel/mac80211/patches/322-brcmfmac-only-call-brcmf_cfg80211_detach-when-attach.patch b/package/kernel/mac80211/patches/322-brcmfmac-only-call-brcmf_cfg80211_detach-when-attach.patch new file mode 100644 index 0000000000..2b61f4eda5 --- /dev/null +++ b/package/kernel/mac80211/patches/322-brcmfmac-only-call-brcmf_cfg80211_detach-when-attach.patch @@ -0,0 +1,92 @@ +From: Arend van Spriel <arend@broadcom.com> +Date: Wed, 26 Aug 2015 22:14:56 +0200 +Subject: [PATCH] brcmfmac: only call brcmf_cfg80211_detach() when attach + was successful + +In brcmf_bus_start() the function brcmf_cfg80211_attach() is called which +may fail. If this happens we should not call brcmf_cfg80211_detach() in +the failure path as it will result in NULL pointer dereference: + + brcmf_fweh_activate_events: Set event_msgs error (-5) + brcmf_bus_start: failed: -5 + brcmf_sdio_firmware_callback: dongle is not responding + BUG: unable to handle kernel NULL pointer dereference at 0000000000000068 + IP: [<ffffffff811e8f08>] kernfs_find_ns+0x18/0xd0 + PGD 0 + Oops: 0000 [#1] SMP + Modules linked in: brcmfmac(O) brcmutil(O) cfg80211 auth_rpcgss + CPU: 1 PID: 45 Comm: kworker/1:1 Tainted: G O + Hardware name: Dell Inc. Latitude E6410/07XJP9, BIOS A07 02/15/2011 + Workqueue: events request_firmware_work_func + task: ffff880036c09ac0 ti: ffff880036dd4000 task.ti: ffff880036dd4000 + RIP: 0010:[<ffffffff811e8f08>] [<ffffffff811e8f08>] kernfs_find_ns+0x18/0xd0 + RSP: 0018:ffff880036dd7a28 EFLAGS: 00010246 + RAX: ffff880036c09ac0 RBX: 0000000000000000 RCX: 000000007fffffff + RDX: 0000000000000000 RSI: ffffffff816578b9 RDI: 0000000000000000 + RBP: ffff880036dd7a48 R08: 0000000000000000 R09: ffff880036c0b340 + R10: 00000000000002ec R11: ffff880036dd7b08 R12: ffffffff816578b9 + R13: 0000000000000000 R14: ffffffff816578b9 R15: ffff8800c6c87000 + FS: 0000000000000000(0000) GS:ffff88012bc40000(0000) knlGS:0000000000000000 + CS: 0010 DS: 0000 ES: 0000 CR0: 000000008005003b + CR2: 0000000000000068 CR3: 0000000001a0b000 CR4: 00000000000006e0 + Stack: + 0000000000000000 ffffffff816578b9 0000000000000000 ffff8800c0d003c8 + ffff880036dd7a78 ffffffff811e8ff5 0000000ffffffff1 ffffffff81a9b060 + ffff8800c789f880 ffff8800c0d00000 ffff880036dd7a98 ffffffff811ebe0d + Call Trace: + [<ffffffff811e8ff5>] kernfs_find_and_get_ns+0x35/0x60 + [<ffffffff811ebe0d>] sysfs_unmerge_group+0x1d/0x60 + [<ffffffff81404ef2>] dpm_sysfs_remove+0x22/0x60 + [<ffffffff813f9db9>] device_del+0x49/0x240 + [<ffffffff815da768>] rfkill_unregister+0x58/0xc0 + [<ffffffffa06bd91b>] wiphy_unregister+0xab/0x2f0 [cfg80211] + [<ffffffffa0742fe3>] brcmf_cfg80211_detach+0x23/0x50 [brcmfmac] + [<ffffffffa074d986>] brcmf_detach+0x86/0xe0 [brcmfmac] + [<ffffffffa0757de8>] brcmf_sdio_remove+0x48/0x120 [brcmfmac] + [<ffffffffa0758ed9>] brcmf_sdiod_remove+0x29/0xd0 [brcmfmac] + [<ffffffffa0759031>] brcmf_ops_sdio_remove+0xb1/0x110 [brcmfmac] + [<ffffffffa001c267>] sdio_bus_remove+0x37/0x100 [mmc_core] + [<ffffffff813fe026>] __device_release_driver+0x96/0x130 + [<ffffffff813fe0e3>] device_release_driver+0x23/0x30 + [<ffffffffa0754bc8>] brcmf_sdio_firmware_callback+0x2a8/0x5d0 [brcmfmac] + [<ffffffffa074deaf>] brcmf_fw_request_nvram_done+0x15f/0x5e0 [brcmfmac] + [<ffffffff8140142f>] ? devres_add+0x3f/0x50 + [<ffffffff810642b5>] ? usermodehelper_read_unlock+0x15/0x20 + [<ffffffff81400000>] ? platform_match+0x70/0xa0 + [<ffffffff8140f400>] request_firmware_work_func+0x30/0x60 + [<ffffffff8106828c>] process_one_work+0x14c/0x3d0 + [<ffffffff8106862a>] worker_thread+0x11a/0x450 + [<ffffffff81068510>] ? process_one_work+0x3d0/0x3d0 + [<ffffffff8106d692>] kthread+0xd2/0xf0 + [<ffffffff8106d5c0>] ? kthread_create_on_node+0x180/0x180 + [<ffffffff815ed35f>] ret_from_fork+0x3f/0x70 + [<ffffffff8106d5c0>] ? kthread_create_on_node+0x180/0x180 + Code: e9 40 fe ff ff 48 89 d8 eb 87 66 0f 1f 84 00 00 00 00 00 66 66 66 66 + 90 55 48 89 e5 41 56 49 89 f6 41 55 49 89 d5 31 d2 41 54 53 <0f> b7 + 47 68 48 8b 5f 48 66 c1 e8 05 83 e0 01 4d 85 ed 0f b6 c8 + RIP [<ffffffff811e8f08>] kernfs_find_ns+0x18/0xd0 + RSP <ffff880036dd7a28> + CR2: 0000000000000068 + ---[ end trace 87d6ec0d3fe46740 ]--- + +Reported-by: Daniel (Deognyoun) Kim <dekim@broadcom.com> +Reviewed-by: Hante Meuleman <meuleman@broadcom.com> +Reviewed-by: Franky (Zhenhui) Lin <frankyl@broadcom.com> +Reviewed-by: Pieter-Paul Giesberts <pieterpg@broadcom.com> +Signed-off-by: Arend van Spriel <arend@broadcom.com> +--- + +--- a/drivers/net/wireless/brcm80211/brcmfmac/core.c ++++ b/drivers/net/wireless/brcm80211/brcmfmac/core.c +@@ -1049,7 +1049,10 @@ int brcmf_bus_start(struct device *dev) + fail: + if (ret < 0) { + brcmf_err("failed: %d\n", ret); +- brcmf_cfg80211_detach(drvr->config); ++ if (drvr->config) { ++ brcmf_cfg80211_detach(drvr->config); ++ drvr->config = NULL; ++ } + if (drvr->fws) { + brcmf_fws_del_interface(ifp); + brcmf_fws_deinit(drvr); |