hw pointer of ath_hw is not assigned to proper value in function ath9k_hw_reset what finally causes kernel panic. This can be solved by proper initialization of ath_hw in ath9k_init_priv. Signed-off-by: Marek Puzyniak <marek.puzyniak@xxxxxxxxx> --- [432866.234088] BUG: unable to handle kernel NULL pointer dereference at 0000000000000030 [432866.234139] IP: [<ffffffffa09cd915>] ath9k_hw_reset+0xe05/0x13e0 [ath9k_hw] [432866.234183] PGD 220dc9067 PUD 220dca067 PMD 0 [432866.234213] Oops: 0000 [#1] SMP [432866.234234] Modules linked in: ath9k_htc ath9k_common ath9k_hw ath btrfs xor raid6_pq ufs qnx4 hfsplus hfs minix ntfs msdos jfs xfs libcrc32c reiserfs ext2 ppdev lp rfcomm bnep binfmt_misc nfsd auth_rpcgss nfs_acl nfs lockd fscache sunrpc snd_hda_codec_hdmi snd_hda_codec_idt snd_hda_codec_generic arc4 joydev uvcvideo videobuf2_vmalloc videobuf2_memops videobuf2_core v4l2_common iwlmvm videodev iwldvm btusb mac80211 bluetooth snd_hda_intel i915 snd_hda_controller snd_hda_codec snd_hwdep snd_pcm snd_seq iTCO_wdt snd_seq_device iwlwifi parport_pc tpm_tis dell_laptop snd_timer cfg80211 drm_kms_helper snd drm psmouse parport soundcore video iTCO_vendor_support dcdbas i2c_algo_bit i2c_i801 lpc_ich dell_wmi pcspkr sparse_keymap serio_raw wmi evbug mac_hid ahci sdhci_pci libahci sdhci e1000e ptp pps_core [432866.234749] CPU: 0 PID: 3131 Comm: NetworkManager Tainted: G W 3.17.0-rc6-wl+ #63 [432866.234790] Hardware name: Dell Inc. Latitude E6420/0K0DNP, BIOS A08 10/18/2011 [432866.234826] task: ffff88021f1221c0 ti: ffff88021e920000 task.ti: ffff88021e920000 [432866.234862] RIP: 0010:[<ffffffffa09cd915>] [<ffffffffa09cd915>] ath9k_hw_reset+0xe05/0x13e0 [ath9k_hw] [432866.234913] RSP: 0018:ffff88021e923568 EFLAGS: 00010283 [432866.234940] RAX: 0000000000000000 RBX: ffff8801c2904330 RCX: 0000000000000006 [432866.234975] RDX: 0000000000000006 RSI: ffff88021f122a18 RDI: ffff88021f1221c0 [432866.235010] RBP: ffff88021e9235d8 R08: 0000000000000000 R09: 0000000000000000 [432866.235044] R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 [432866.235079] R13: 0000000000000000 R14: 0000000000000000 R15: ffff8801c2904000 [432866.235114] FS: 00007f8f64f64800(0000) GS:ffff88022dc00000(0000) knlGS:0000000000000000 [432866.235153] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 [432866.235182] CR2: 0000000000000030 CR3: 0000000220c56000 CR4: 00000000000407f0 [432866.235216] Stack: [432866.235228] ffff88021e9235d8 ffffffff81800964 0000000000000000 00ff880120000000 [432866.235272] 00000000000183f5 ffff8801c2904040 ffff8801c2904040 ffff88021f7fb818 [432866.235315] ffff88021e9235d8 ffff8801c2a2a620 ffff8801c2904000 ffff8801c2a289a0 [432866.235359] Call Trace: [432866.235378] [<ffffffffa0a41423>] ath9k_htc_start+0xa3/0x280 [ath9k_htc] [432866.235414] [<ffffffff810a1b7a>] ? mark_held_locks+0x6a/0x90 [432866.235458] [<ffffffffa04815a1>] ieee80211_do_open+0x331/0xdd0 [mac80211] [432866.235495] [<ffffffff81749b8e>] ? mutex_unlock+0xe/0x10 [432866.235532] [<ffffffffa04820a1>] ieee80211_open+0x61/0x70 [mac80211] [432866.235566] [<ffffffff816384d6>] __dev_open+0xb6/0x130 [432866.235594] [<ffffffff816387ec>] __dev_change_flags+0xac/0x180 [432866.235625] [<ffffffff81638910>] dev_change_flags+0x30/0x70 [432866.235657] [<ffffffff811556e2>] ? get_page_from_freelist+0x822/0x980 [432866.235692] [<ffffffff81646409>] do_setlink+0x349/0x9e0 [432866.235721] [<ffffffff810a1cad>] ? trace_hardirqs_on_caller+0x10d/0x1d0 [432866.235755] [<ffffffff810a1d7d>] ? trace_hardirqs_on+0xd/0x10 [432866.235786] [<ffffffff8164926b>] rtnl_newlink+0x4cb/0x730 [432866.235816] [<ffffffff81648ea3>] ? rtnl_newlink+0x103/0x730 [432866.235848] [<ffffffff81648c00>] rtnetlink_rcv_msg+0xa0/0x240 [432866.235879] [<ffffffff810a1d7d>] ? trace_hardirqs_on+0xd/0x10 [432866.235910] [<ffffffff81644e47>] ? rtnl_lock+0x17/0x20 [432866.235939] [<ffffffff81648b60>] ? __rtnl_unlock+0x20/0x20 [432866.235970] [<ffffffff81664ff1>] netlink_rcv_skb+0xb1/0xc0 [432866.236000] [<ffffffff81644ec5>] rtnetlink_rcv+0x25/0x40 [432866.236029] [<ffffffff816648ad>] netlink_unicast+0x18d/0x200 [432866.236060] [<ffffffff81664c3d>] netlink_sendmsg+0x31d/0x430 [432866.236091] [<ffffffff8161ab3c>] sock_sendmsg+0x9c/0xd0 [432866.236121] [<ffffffff81176aac>] ? might_fault+0x8c/0xa0 [432866.236149] [<ffffffff81176a63>] ? might_fault+0x43/0xa0 [432866.236179] [<ffffffff81629366>] ? verify_iovec+0x56/0xe0 [432866.236208] [<ffffffff8161b5f9>] ___sys_sendmsg+0x389/0x3a0 [432866.236239] [<ffffffff811ddc65>] ? __fget+0x5/0xe0 [432866.236266] [<ffffffff811dddc3>] ? __fdget+0x13/0x20 [432866.237561] [<ffffffff811ddd0a>] ? __fget+0xaa/0xe0 [432866.238837] [<ffffffff811ddc65>] ? __fget+0x5/0xe0 [432866.240098] [<ffffffff811ddd65>] ? __fget_light+0x25/0x70 [432866.241357] [<ffffffff8161c069>] __sys_sendmsg+0x49/0x90 [432866.242489] [<ffffffff8161c0c2>] SyS_sendmsg+0x12/0x20 [432866.243308] [<ffffffff8174c496>] system_call_fastpath+0x1a/0x1f [432866.244029] Code: 00 41 ff 57 10 bf de 46 03 00 e8 07 91 9c e0 e9 6d f4 ff ff 66 90 41 81 bf c8 02 00 00 c0 02 00 00 0f 84 df 03 00 00 49 8b 47 38 <80> 78 30 00 0f 84 7e fb ff ff f6 43 0a 30 49 8b 87 e0 16 00 00 [432866.245634] RIP [<ffffffffa09cd915>] ath9k_hw_reset+0xe05/0x13e0 [ath9k_hw] [432866.246399] RSP <ffff88021e923568> [432866.247145] CR2: 0000000000000030 [432866.252454] ---[ end trace 85181a8c528713c8 ]--- drivers/net/wireless/ath/ath9k/htc_drv_init.c | 1 + 1 file changed, 1 insertion(+) diff --git a/drivers/net/wireless/ath/ath9k/htc_drv_init.c b/drivers/net/wireless/ath/ath9k/htc_drv_init.c index d779f4f..4014c4b 100644 --- a/drivers/net/wireless/ath/ath9k/htc_drv_init.c +++ b/drivers/net/wireless/ath/ath9k/htc_drv_init.c @@ -464,6 +464,7 @@ static int ath9k_init_priv(struct ath9k_htc_priv *priv, return -ENOMEM; ah->dev = priv->dev; + ah->hw = priv->hw; ah->hw_version.devid = devid; ah->hw_version.usbdev = drv_info; ah->ah_flags |= AH_USE_EEPROM; -- 2.1.1 -- To unsubscribe from this list: send the line "unsubscribe linux-wireless" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
