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Message-ID: <CA+55aFxyp5gpUZEYHXLwyhbK6DMWf4RoVykGxq9FPtO=j4yJsw@mail.gmail.com> Date: Wed, 3 May 2017 19:28:29 -0700 From: Linus Torvalds <torvalds@...ux-foundation.org> To: David Miller <davem@...emloft.net>, Johannes Berg <johannes@...solutions.net> Cc: Linux Wireless List <linux-wireless@...r.kernel.org>, Network Development <netdev@...r.kernel.org>, Linux Kernel Mailing List <linux-kernel@...r.kernel.org> Subject: new warning at net/wireless/util.c:1236 So my Dell XPS 13 seems to have grown a new warning as of the networking merge yesterday. Things still work, but when it starts warning, it generates a *lot* of noise (I got 36 of these within about ten minutes). I have no idea what triggered it, because when I rebooted (not because of this issue, but just to reboot into a newer kernel) I don't see it again. This is all pretty regular wireless - it's intel 8260 wireless in a fairly normal laptop. Things still seem to *work* ok, so the only problem here is the overly verbose and useless WARN_ON. It doesn't even print out *which* rate it is warning about, it just does that stupid unconditional WARN_ON() without ever shutting up about it.. The WARN_ON() seems to be old, but my logs don't seem to have any mention of this until today, so there's something that has changed that now triggers it. Ideas? Linus --- WARNING: CPU: 3 PID: 1138 at net/wireless/util.c:1236 cfg80211_calculate_bitrate+0x139/0x170 [cfg80211] Modules linked in: rfcomm fuse ccm ip6t_rpfilter ip6t_REJECT nf_reject_ipv6 xt_conntrack ip_set nfnetlink ebtable_broute bridge stp llc ebtable_nat ip6table_security ip6table_mangle ip6table_nat nf_con snd_hda_codec iwlmvm irqbypass snd_hwdep snd_hda_core intel_cstate mac80211 snd_seq intel_rapl_perf snd_seq_device snd_pcm iwlwifi rtsx_pci_ms snd_timer cfg80211 memstick snd soundcore i2c_i801 shpchp i2c_algo_bit drm_kms_helper syscopyarea sysfillrect sysimgblt fb_sys_fops drm i2c_hid video CPU: 3 PID: 1138 Comm: NetworkManager Tainted: G W 4.11.0-06543-g2f34c1231bfc #60 Hardware name: Dell Inc. XPS 13 9350/09JHRY, BIOS 1.4.13 12/28/2016 task: ffff9c1d1bfcbb80 task.stack: ffffbb95c337c000 RIP: 0010:cfg80211_calculate_bitrate+0x139/0x170 [cfg80211] RSP: 0018:ffffbb95c337f5b8 EFLAGS: 00010293 RAX: 0000000000000000 RBX: ffff9c1cb080cc00 RCX: 0000000000000000 RDX: 0000000000000005 RSI: 0000000000000002 RDI: ffffbb95c337f76e RBP: ffffbb95c337f5b8 R08: 0000000000000004 R09: ffff9c1cc36fe0c4 R10: 00000000f7c00472 R11: ffffffffc0682000 R12: ffff9c1cc36fe0c0 R13: ffffbb95c337f76e R14: 0000000000000000 R15: ffff9c1cc36fe030 FS: 00007f000015f980(0000) GS:ffff9c1d3ed80000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007ffd1ae62748 CR3: 0000000469f4f000 CR4: 00000000003406e0 Call Trace: nl80211_put_sta_rate+0x56/0x210 [cfg80211] nl80211_send_station.isra.63+0x639/0xd60 [cfg80211] nl80211_get_station+0x1e4/0x250 [cfg80211] genl_family_rcv_msg+0x1fa/0x3e0 genl_rcv_msg+0x4c/0x90 netlink_rcv_skb+0xde/0x110 genl_rcv+0x28/0x40 netlink_unicast+0x189/0x220 netlink_sendmsg+0x2ba/0x3b0 sock_sendmsg+0x38/0x50 ___sys_sendmsg+0x2b6/0x2d0 __sys_sendmsg+0x54/0x90 SyS_sendmsg+0x12/0x20 entry_SYSCALL_64_fastpath+0x13/0x94 RIP: 0033:0x7efffebf82fd RSP: 002b:00007fff97d4af30 EFLAGS: 00000293 ORIG_RAX: 000000000000002e RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007efffebf82fd RDX: 0000000000000000 RSI: 00007fff97d4afc0 RDI: 0000000000000010 RBP: 00007fff97d4b070 R08: 0000000000000000 R09: 00007efffcc7b168 R10: 000055eb69e6d110 R11: 0000000000000293 R12: 00007fff97d4b0e0 R13: 0000000000000001 R14: 0000000000000000 R15: 000055eb68a32760 Code: 89 d0 f7 e1 d1 ea 8d 14 92 01 d2 81 c2 50 c3 00 00 b9 c5 5a 7c 0a c1 ea 05 89 d0 f7 e1 5d 89 d0 c1 e8 07 c3 31 c0 80 f9 02 74 b7 <0f> ff 31 c0 eb b1 0f ff 31 c0 5d c3 0f ff 31 c0 5d c3 8d 04 40
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