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authorBenjamin Block <[email protected]>2019-07-02 23:02:01 +0200
committerMartin K. Petersen <[email protected]>2019-07-11 21:04:22 -0400
commit106d45f350c7cac876844dc685845cba4ffdb70b (patch)
tree6f68cf4e5780c123d2b51f3513fb822e21045886 /net/lapb/lapb_timer.c
parentb76becde2b84137faa29bbc9a3b20953b5980e48 (diff)
scsi: zfcp: fix request object use-after-free in send path causing wrong traces
When tracing instances where we open and close WKA ports, we also pass the request-ID of the respective FSF command. But after successfully sending the FSF command we must not use the request-object anymore, as this might result in an use-after-free (see "zfcp: fix request object use-after-free in send path causing seqno errors" ). To fix this add a new variable that caches the request-ID before sending the request. This won't change during the hand-off to the FCP channel, and so it's safe to trace this cached request-ID later, instead of using the request object. Signed-off-by: Benjamin Block <[email protected]> Fixes: d27a7cb91960 ("zfcp: trace on request for open and close of WKA port") Cc: <[email protected]> #2.6.38+ Reviewed-by: Steffen Maier <[email protected]> Reviewed-by: Jens Remus <[email protected]> Signed-off-by: Martin K. Petersen <[email protected]>
Diffstat (limited to 'net/lapb/lapb_timer.c')
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