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author | Pavel Begunkov <asml.silence@gmail.com> | 2022-04-14 08:50:50 +0100 |
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committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2022-04-15 14:18:41 +0200 |
commit | 1a623d361ffe5cecd4244a02f449528416360038 (patch) | |
tree | b99709904f01723c8475b87507637b4427b9c94c /kernel | |
parent | 33fcb359a64213bea0510770abc761de9780ca89 (diff) |
io_uring: fix fs->users overflow
There is a bunch of cases where we can grab req->fs but not put it, this
can be used to cause a controllable overflow with further implications.
Release req->fs in the request free path and make sure we zero the field
to be sure we don't do it twice.
Fixes: cac68d12c531 ("io_uring: grab ->fs as part of async offload")
Reported-by: Bing-Jhong Billy Jheng <billy@starlabs.sg>
Signed-off-by: Pavel Begunkov <asml.silence@gmail.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'kernel')
0 files changed, 0 insertions, 0 deletions