Sven Eckelmann <sven@xxxxxxxxxxxxx> wrote:
> The relayfs was changed to use per CPU constructs to handle the rchan
> buffers. But the users of the rchan buffers in other parts of the kernel
> were not modified. This caused crashes like
>
> BUG: unable to handle kernel paging request at 00003a5198a0b910
> IP: [<ffffffffa973cb3a>] ath_cmn_process_fft+0xea/0x610
> PGD 0 [ 179.522449]
> Oops: 0000 [#1] SMP
> Modules linked in:
> CPU: 0 PID: 0 Comm: swapper/0 Not tainted 4.9.0-rc5 #1
> [...]
> Call Trace:
> <IRQ> [ 179.656426] [<ffffffffa9704373>] ? ath_rx_tasklet+0x2f3/0xd10
> [<ffffffffa9702106>] ? ath9k_tasklet+0x1b6/0x230
> [<ffffffffa90dcbd1>] ? tasklet_action+0xf1/0x100
> [<ffffffffa9a3cb3f>] ? __do_softirq+0xef/0x284
> [<ffffffffa90dd22e>] ? irq_exit+0xae/0xb0
> [<ffffffffa9a3c89f>] ? do_IRQ+0x4f/0xd0
> [<ffffffffa9a3aa42>] ? common_interrupt+0x82/0x82
> <EOI> [ 179.703152] [<ffffffffa9a39c1d>] ? poll_idle+0x2d/0x57
> [<ffffffffa908c845>] ? sched_clock+0x5/0x10
> [<ffffffffa97bc8d6>] ? cpuidle_enter_state+0xf6/0x2d0
> [<ffffffffa911988e>] ? cpu_startup_entry+0x14e/0x230
> [<ffffffffaa3cdf70>] ? start_kernel+0x461/0x481
> [<ffffffffaa3cd120>] ? early_idt_handler_array+0x120/0x120
> [<ffffffffaa3cd413>] ? x86_64_start_kernel+0x14c/0x170
> Code: 31 db 41 be ff ff ff ff 4c 8b 26 48 8b 6e 08 49 8b 84 24 60 05 00
> 00 48 8b 00 0f b7 40 04 66 89 44 24 48 eb 11 48 8b 55 40 48 98 <48>
> 8b 3c c2 e8 ad a0 a4 ff 01 c3 41 8d 56 01 be 00 02 00 00 48
> RIP [<ffffffffa973cb3a>] ath_cmn_process_fft+0xea/0x610
> RSP <ffff9b43e7003d20>
> CR2: 00003a5198a0b910
>
> Fixes: 017c59c042d0 ("relay: Use per CPU constructs for the relay channel buffer pointers")
> Cc: Akash Goel <akash.goel@xxxxxxxxx>
> Cc: Nick Kossifidis <mickflemm@xxxxxxxxx>
> Reported-by: Mathias Kretschmer <mathias.kretschmer@xxxxxxxxxxxxxxxxx>
> Signed-off-by: Sven Eckelmann <sven@xxxxxxxxxxxxx>
Patch applied to ath-next branch of ath.git, thanks.
07460b92db7c ath9k: Access rchan::buf only with per_cpu helper
--
https://patchwork.kernel.org/patch/9570191/
Documentation about submitting wireless patches and checking status
from patchwork:
https://wireless.wiki.kernel.org/en/developers/documentation/submittingpatches
