diff options
| author |   Lukasz Majewski <lukma@denx.de> | 2023-09-15 20:10:02 +0200 |
|---|---|---|
| committer |   David S. Miller <davem@davemloft.net> | 2023-09-18 08:26:19 +0100 |
| commit | 295de650d3aaf9e50258465c5f1c84b465d836f6 (patch) | |
| tree | 06997d950d6bc55a631df64cdf0069e64febbcc6 /net/hsr | |
| parent | dccp: fix dccp_v4_err()/dccp_v6_err() again (diff) | |
| download | wireguard-linux-295de650d3aaf9e50258465c5f1c84b465d836f6.tar.xz wireguard-linux-295de650d3aaf9e50258465c5f1c84b465d836f6.zip | |
net: hsr: Properly parse HSRv1 supervisor frames.
While adding support for parsing the redbox supervision frames, the
author added `pull_size' and `total_pull_size' to track the amount of
bytes that were pulled from the skb during while parsing the skb so it
can be reverted/ pushed back at the end.
In the process probably copy&paste error occurred and for the HSRv1 case
the ethhdr was used instead of the hsr_tag. Later the hsr_tag was used
instead of hsr_sup_tag. The later error didn't matter because both
structs have the size so HSRv0 was still working. It broke however HSRv1
parsing because struct ethhdr is larger than struct hsr_tag.
Reinstate the old pulling flow and pull first ethhdr, hsr_tag in v1 case
followed by hsr_sup_tag.
[bigeasy: commit message]
Fixes: eafaa88b3eb7 ("net: hsr: Add support for redbox supervision frames")'
Suggested-by: Tristram.Ha@microchip.com
Signed-off-by: Lukasz Majewski <lukma@denx.de>
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Reviewed-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/hsr')
| -rw-r--r-- | net/hsr/hsr_framereg.c | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/net/hsr/hsr_framereg.c b/net/hsr/hsr_framereg.c index b77f1189d19d..6d14d935ee82 100644 --- a/net/hsr/hsr_framereg.c +++ b/net/hsr/hsr_framereg.c @@ -288,13 +288,13 @@ void hsr_handle_sup_frame(struct hsr_frame_info *frame) /* And leave the HSR tag. */ if (ethhdr->h_proto == htons(ETH_P_HSR)) { - pull_size = sizeof(struct ethhdr); + pull_size = sizeof(struct hsr_tag); skb_pull(skb, pull_size); total_pull_size += pull_size; } /* And leave the HSR sup tag. */ - pull_size = sizeof(struct hsr_tag); + pull_size = sizeof(struct hsr_sup_tag); skb_pull(skb, pull_size); total_pull_size += pull_size; |