Christoph Hellwig 4f010246b4 net/bpfilter: Initialize pos in __bpfilter_process_sockopt ... __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 now verified the position, which can lead to a failure depending on the exact stack initialization pattern. Initialize the variable to zero to make rw_verify_area happy. Fixes: 6955a76fbc ("bpfilter: switch to kernel_write") Reported-by: Christian Brauner <christian.brauner@ubuntu.com> Reported-by: Rodrigo Madera <rodrigo.madera@gmail.com> Signed-off-by: Christoph Hellwig <hch@lst.de> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Tested-by: Rodrigo Madera <rodrigo.madera@gmail.com> Tested-by: Christian Brauner <christian.brauner@ubuntu.com> Reviewed-by: Christian Brauner <christian.brauner@ubuntu.com> Link: https://lore.kernel.org/bpf/20200730160900.187157-1-hch@lst.de		2020-07-31 01:07:32 +02:00
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.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
bpfilter_kern.c	net/bpfilter: Initialize pos in __bpfilter_process_sockopt	2020-07-31 01:07:32 +02:00
bpfilter_umh_blob.S	net: bpfilter: change section name of bpfilter UMH blob.	2019-01-16 15:46:46 -08:00
Kconfig	bpfilter: document build requirements for bpfilter_umh	2020-05-26 00:03:16 +09:00
main.c	net/bpfilter: remove superfluous testing message	2020-03-31 10:07:51 -07:00
Makefile	bpfilter: use 'userprogs' syntax to build bpfilter_umh	2020-05-17 18:52:01 +09:00
msgfmt.h	net: add skeleton of bpfilter kernel module	2018-05-23 13:23:40 -04:00