Lorenzo Bianconi <lorenzo.bianconi@xxxxxxxxxx> writes:
> Fix following crash due to a leftover uninitialized mutex access
> in mt76x2_set_rts_threshold routine.
>
> [ 31.018059] Call Trace:
> [ 31.018341] register_lock_class+0x51f/0x530
> [ 31.018828] __lock_acquire+0x6c/0x1580
> [ 31.019247] lock_acquire+0x88/0x120
> [ 31.021089] __mutex_lock+0x4a/0x4f0
> [ 31.023343] mt76x2_set_rts_threshold+0x28/0x50
> [ 31.023831] ieee80211_set_wiphy_params+0x16d/0x4e0
> [ 31.024344] nl80211_set_wiphy+0x72b/0xbc0
> [ 31.024781] genl_family_rcv_msg+0x192/0x3a0
> [ 31.025233] genl_rcv_msg+0x42/0x89
> [ 31.026079] netlink_rcv_skb+0x38/0x100
> [ 31.026475] genl_rcv+0x1f/0x30
> [ 31.026804] netlink_unicast+0x19c/0x250
> [ 31.027212] netlink_sendmsg+0x1ed/0x390
> [ 31.027615] sock_sendmsg+0x31/0x40
> [ 31.027973] ___sys_sendmsg+0x23c/0x280
> [ 31.030414] __sys_sendmsg+0x42/0x80
> [ 31.030783] do_syscall_64+0x4a/0x170
> [ 31.031160] entry_SYSCALL_64_after_hwframe+0x49/0xbe
> [ 31.031677] RIP: 0033:0x7f3498b39ba7
> [ 31.033953] RSP: 002b:00007fffe19675b8 EFLAGS: 00000246 ORIG_RAX: 000000000000002e
> [ 31.034883] RAX: ffffffffffffffda RBX: 00000000012d5350 RCX: 00007f3498b39ba7
> [ 31.035756] RDX: 0000000000000000 RSI: 00007fffe19675f0 RDI: 0000000000000003
> [ 31.036587] RBP: 00000000012da740 R08: 0000000000000002 R09: 0000000000000000
> [ 31.037422] R10: 0000000000000006 R11: 0000000000000246 R12: 00000000012da880
> [ 31.038252] R13: 00007fffe19675f0 R14: 00007fffe19678c0 R15: 00000000012da880
>
> Fixes: 108a4861ef19 ("mt76: create new mt76x02-lib module for common
> mt76x{0,2} code")
> Reported-by: lorenzo.trisolini@xxxxxxxxxxxxx
> Reported-by: luca.bisti@xxxxxxxxxxxxx
> Signed-off-by: Lorenzo Bianconi <lorenzo.bianconi@xxxxxxxxxx>
This should be v2, but no need to resend.
> This patch is for 4.20
Ok, I'll queue this for that release.
--
Kalle Valo
