Package: broadcom-sta-dkms Version: 6.30.223.248-2 Severity: critical this bug report is about a kernel panic that happens pretty reproducibly on two systems with different broadcom card models and kernel builds. in both cases, it does not happen during "normal" network traffic, but only when the instant messenger gajim is started. i'll call the affected systems by their hostnames.
hephaistos has a BCM43142 wifi card and uses the 3.16-1~exp1 kernel. here's a transcript a screenshot's relevant parts (can provide full screenshot if it helps): > BUG: unable to handle kernel NULL pointer dereference at 0000000000000360 > IP: [<ffffffffa062e963>] wlc_ioctl+0x21/0x168 [wl] > [...] > CPU: 1 PID: 21221 Comm: gajim Tainted: P O 3.16-trunk-amd64 #1 Debian > 3.16-1~exp1 > [...] > Call Trace: > wl_proc_read+0x40/0xa0 [wl] > proc_read_reg+0x34/0x70 > vfs_read+0x8e/0x170 > SyS_read+0x3d/0xa0 > system_call_fast_compare_end+0x10/0x15 hephaistos has been on sid plus some experimental since long, and the behavior first appeared around 2014-10-29. i blamed it on failing hardware (graphics card behaved oddly at the same time) and replaced the device. artemis has a BCM4313, and was recently (around 2014-11-20) upgraded from wheezy to jessie. it has a 3.16.0-4-amd64 kernel. its backtrace only differs in gajim PID, kernel taint (there's an additional W), kernel version (3.16.0-4-amd64 #1 Debian 3.16.7-2) and the details of the call trace (the +0x00 part is larger by 5 for all but system_call_fast_compare_end). i'll try to further narrow down which kernel versions are affected, and what kind of traffic causes the issue (my first wild guess would be multicasting, which gajim probably does for lan-local autodiscovery). is there any further information i can provide to find a solution for this? -- System Information: Debian Release: jessie/sid APT prefers unstable APT policy: (500, 'unstable'), (1, 'experimental') Architecture: amd64 (x86_64) Foreign Architectures: i386 Kernel: Linux 3.16-trunk-amd64 (SMP w/4 CPU cores) Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8) Shell: /bin/sh linked to /bin/dash Versions of packages broadcom-sta-dkms depends on: ii dkms 2.2.0.3-2 Versions of packages broadcom-sta-dkms recommends: ii wireless-tools 30~pre9-8 broadcom-sta-dkms suggests no packages. -- To use raw power is to make yourself infinitely vulnerable to greater powers. -- Bene Gesserit axiom
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