Hi, The regression I reported a few weeks ago for 4.15, exists also in 4.16. That is, with a bcm4331/ht-phy b43 can be loaded and used without problems, but the driver crashes when it gets unloaded (making a hard reset of the machine necessary). This problem has been introduced between 4.14 and 4.15. Does anyone have an idea about that? Is there any information I can provide to trace this down? cheers, lukas On 04/05/18 22:55, Wirz wrote: > Hi, > > I'm using b43 to operate a BCM4331 (on a MacBookPro 9,2). At the moment > I'm using the kernels that are shipped with debian testing. > > On all three versions of 4.15 (what debian called 4.15.4, 4.15.11, and > 4.15.17) that were available as well as the current 4.16.5 I can load > b43 and successfully use it, but the kernel crashes when unloading the > driver, see the trace below. > I had no such problems under 4.14.17. > > Is that a known problem? Can I provide any more information to trace > this down? > > cheers, lukas > > > > [27541.758851] wlan0: deauthenticating from f4:6b:ef:5f:1b:e5 by local > choice (Reason: 3=DEAUTH_LEAVING) > [27542.009123] general protection fault: 0000 [#1] SMP PTI > [27542.009129] Modules linked in: ctr ccm cpufreq_conservative bnep > cpufreq_userspace cpufreq_powersave binfmt_misc dm_crypt algif_skcipher > af_alg btusb btrtl btbcm btintel hid_appleir hid_apple bluetooth > jitterentropy_rng drbg ansi_cprng ecdh_generic hid_generic usbhid > bcm5974 hid arc4 b43(-) joydev uvcvideo videobuf2_vmalloc > videobuf2_memops videobuf2_v4l2 mac80211 videobuf2_common videodev media > cfg80211 intel_rapl x86_pkg_temp_thermal intel_powerclamp efi_pstore ssb > rfkill pcmcia pcmcia_core coretemp rng_core nls_ascii kvm_intel kvm > irqbypass nls_cp437 iTCO_wdt iTCO_vendor_support vfat fat > crct10dif_pclmul crc32_pclmul snd_hda_codec_hdmi evdev > snd_hda_codec_cirrus dm_mod snd_hda_codec_generic applesmc input_polldev > ghash_clmulni_intel intel_cstate intel_uncore intel_rapl_perf pcspkr > efivars snd_hda_intel > [27542.009199] snd_hda_codec snd_hda_core snd_hwdep bcma snd_pcm_oss > i915 snd_mixer_oss snd_pcm drm_kms_helper snd_timer mei_me snd drm sg > soundcore mei i2c_algo_bit shpchp lpc_ich sbs apple_gmux sbshc acpi_als > kfifo_buf industrialio video apple_bl ac button loop firewire_sbp2 > parport_pc ppdev lp parport efivarfs ip_tables x_tables autofs4 ext4 > crc16 mbcache jbd2 fscrypto ecb btrfs zstd_decompress zstd_compress > xxhash raid10 raid456 async_raid6_recov async_memcpy async_pq async_xor > async_tx xor raid6_pq libcrc32c crc32c_generic raid1 raid0 multipath > linear md_mod sr_mod cdrom sd_mod crc32c_intel ahci libahci sdhci_pci > cqhci sdhci firewire_ohci libata tg3 aesni_intel libphy xhci_pci > aes_x86_64 ehci_pci firewire_core crypto_simd crc_itu_t xhci_hcd > ehci_hcd cryptd glue_helper mmc_core i2c_i801 scsi_mod > [27542.009284] usbcore usb_common thunderbolt > [27542.009293] CPU: 1 PID: 30802 Comm: rmmod Not tainted 4.16.0-1-amd64 > #1 Debian 4.16.5-1 > [27542.009295] Hardware name: Apple Inc. > MacBookPro9,2/Mac-6F01561E16C75D06, BIOS MBP91.88Z.00D3.B0C.1509111653 > 09/11/2015 > [27542.009304] RIP: 0010:kfree+0x4f/0x180 > [27542.009307] RSP: 0018:ffffa8638448fe50 EFLAGS: 00010207 > [27542.009311] RAX: ffff96325b9a4a01 RBX: b842b70420b5828a RCX: > 00000001820001cc > [27542.009314] RDX: 00000001820001cd RSI: ffffe590d16e6900 RDI: > 000069d180000000 > [27542.009316] RBP: ffff96325cadd0a0 R08: ffff96325b9a4bf8 R09: > 00000001820001cc > [27542.009320] R10: 02e0f2141882d600 R11: ffff9631d987d100 R12: > ffffffffc080a122 > [27542.009323] R13: ffffffffc10850f8 R14: ffff96325cadd100 R15: > 0000000000000000 > [27542.009327] FS: 00007f82c0a95b80(0000) GS:ffff96326f280000(0000) > knlGS:0000000000000000 > [27542.009330] CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 > [27542.009333] CR2: 0000559625d724a8 CR3: 00000003d9990001 CR4: > 00000000001606e0 > [27542.009336] Call Trace: > [27542.009349] bcma_device_remove+0x22/0x30 [bcma] > [27542.009357] device_release_driver_internal+0x15a/0x220 > [27542.009364] driver_detach+0x39/0x70 > [27542.009369] bus_remove_driver+0x51/0xd0 > [27542.009385] b43_exit+0x18/0xcaf [b43] > [27542.009392] SyS_delete_module+0x18f/0x290 > [27542.009398] ? task_work_run+0x38/0xb0 > [27542.009404] do_syscall_64+0x6c/0x130 > [27542.009411] entry_SYSCALL_64_after_hwframe+0x3d/0xa2 > [27542.009415] RIP: 0033:0x7f82c03bb5e7 > [27542.009418] RSP: 002b:00007ffc133187c8 EFLAGS: 00000206 ORIG_RAX: > 00000000000000b0 > [27542.009422] RAX: ffffffffffffffda RBX: 00007ffc13318828 RCX: > 00007f82c03bb5e7 > [27542.009426] RDX: 000000000000000a RSI: 0000000000000800 RDI: > 000056430c000808 > [27542.009428] RBP: 000056430c0007a0 R08: 00007ffc13317741 R09: > 0000000000000000 > [27542.009431] R10: 00007f82c042b960 R11: 0000000000000206 R12: > 00007ffc133189f0 > [27542.009434] R13: 00007ffc13318edd R14: 000056430c000260 R15: > 000056430c0007a0 > [27542.009437] Code: 00 80 49 01 da 0f 82 39 01 00 00 48 c7 c7 00 00 00 > 80 48 2b 3d 7b 5c e2 00 49 01 fa 49 c1 ea 0c 49 c1 e2 06 4c 03 15 59 5c > e2 00 <49> 8b 42 20 48 8d 50 ff a8 01 4c 0f 45 d2 49 8b 52 20 48 8d 42 > [27542.009505] RIP: kfree+0x4f/0x180 RSP: ffffa8638448fe50 > [27542.009508] ---[ end trace 564977d3706dc719 ]--- > > -- Do not believe the naysayers who say it cannot be done.
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