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| author | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-24 09:32:35 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2021-04-24 09:32:35 -0700 |
| commit | 799bac5512188522213e2d7eb78ca7094dfdf30c (patch) | |
| tree | c9a95a46f3edbb8a415f4301b3ff65c823b5d41a | |
| parent | 8db5efb83fa99e81c3f8dee92a6589b251f117f3 (diff) | |
| download | linux-799bac5512188522213e2d7eb78ca7094dfdf30c.tar.gz linux-799bac5512188522213e2d7eb78ca7094dfdf30c.tar.bz2 linux-799bac5512188522213e2d7eb78ca7094dfdf30c.zip | |
Revert "net/rds: Avoid potential use after free in rds_send_remove_from_sock"
This reverts commit 0c85a7e87465f2d4cbc768e245f4f45b2f299b05.
The games with 'rm' are on (two separate instances) of a local variable,
and make no difference.
Quoting Aditya Pakki:
"I was the author of the patch and it was the cause of the giant UMN
revert.
The patch is garbage and I was unaware of the steps involved in
retracting it. I *believed* the maintainers would pull it, given it
was already under Greg's list. The patch does not introduce any bugs
but is pointless and is stupid. I accept my incompetence and for not
requesting a revert earlier."
Link: https://lwn.net/Articles/854319/
Requested-by: Aditya Pakki <pakki001@umn.edu>
Cc: Santosh Shilimkar <santosh.shilimkar@oracle.com>
Cc: David S. Miller <davem@davemloft.net>
Cc: Al Viro <viro@zeniv.linux.org.uk>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | net/rds/message.c | 1 | ||||
| -rw-r--r-- | net/rds/send.c | 2 |
2 files changed, 1 insertions, 2 deletions
diff --git a/net/rds/message.c b/net/rds/message.c index 4fc66ff0f1ec..799034e0f513 100644 --- a/net/rds/message.c +++ b/net/rds/message.c @@ -180,7 +180,6 @@ void rds_message_put(struct rds_message *rm) rds_message_purge(rm); kfree(rm); - rm = NULL; } } EXPORT_SYMBOL_GPL(rds_message_put); diff --git a/net/rds/send.c b/net/rds/send.c index fe5264b9d4b3..985d0b7713ac 100644 --- a/net/rds/send.c +++ b/net/rds/send.c @@ -665,7 +665,7 @@ static void rds_send_remove_from_sock(struct list_head *messages, int status) unlock_and_drop: spin_unlock_irqrestore(&rm->m_rs_lock, flags); rds_message_put(rm); - if (was_on_sock && rm) + if (was_on_sock) rds_message_put(rm); } |