diff options
author | Eric Biggers <[email protected]> | 2018-02-06 15:40:24 -0800 |
---|---|---|
committer | Linus Torvalds <[email protected]> | 2018-02-06 18:32:46 -0800 |
commit | a1be1f3931bfe0a42b46fef77a04593c2b136e7f (patch) | |
tree | baff9a1d4276404cd0ce63aff26846d328f4f8c1 | |
parent | 28f3a488ed83ac4a01406490941a6486806d1333 (diff) |
kernel/relay.c: revert "kernel/relay.c: fix potential memory leak"
This reverts commit ba62bafe942b ("kernel/relay.c: fix potential memory leak").
This commit introduced a double free bug, because 'chan' is already
freed by the line:
kref_put(&chan->kref, relay_destroy_channel);
This bug was found by syzkaller, using the BLKTRACESETUP ioctl.
Link: http://lkml.kernel.org/r/[email protected]
Fixes: ba62bafe942b ("kernel/relay.c: fix potential memory leak")
Signed-off-by: Eric Biggers <[email protected]>
Reported-by: syzbot <[email protected]>
Reviewed-by: Andrew Morton <[email protected]>
Cc: Zhouyi Zhou <[email protected]>
Cc: Jens Axboe <[email protected]>
Cc: <[email protected]> [4.7+]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
-rw-r--r-- | kernel/relay.c | 1 |
1 files changed, 0 insertions, 1 deletions
diff --git a/kernel/relay.c b/kernel/relay.c index 41280033a4c5..f7f40a6e6352 100644 --- a/kernel/relay.c +++ b/kernel/relay.c @@ -611,7 +611,6 @@ free_bufs: kref_put(&chan->kref, relay_destroy_channel); mutex_unlock(&relay_channels_mutex); - kfree(chan); return NULL; } EXPORT_SYMBOL_GPL(relay_open); |