On 7/30/20 6:13 PM, Christian Brauner wrote:
On Thu, Jul 30, 2020 at 06:09:00PM +0200, Christoph Hellwig wrote:
__bpfilter_process_sockopt never initialized the pos variable passed to
the pipe write. This has been mostly harmless in the past as pipes
ignore the offset, but the switch to kernel_write no verified the
s/no/now/
position, which can lead to a failure depending on the exact stack
initialization patter. Initialize the variable to zero to make
s/patter/pattern/
rw_verify_area happy.
Fixes: 6955a76fbcd5 ("bpfilter: switch to kernel_write")
Reported-by: Christian Brauner <[email protected]>
Reported-by: Rodrigo Madera <[email protected]>
Signed-off-by: Christoph Hellwig <[email protected]>
Tested-by: Rodrigo Madera <[email protected]>
---
Thanks for tracking this down, Christoph! This fixes the logging issue
for me.
Tested-by: Christian Brauner <[email protected]>
Reviewed-by: Christian Brauner <[email protected]>
Applied to bpf & fixed up the typos in the commit msg, thanks everyone!
