| From | Greg Kroah-Hartman <> | Subject | [PATCH 066/190] Revert "bpf: Remove unnecessary assertion on fp_old" | Date | Wed, 21 Apr 2021 14:59:01 +0200 |
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This reverts commit 5bf2fc1f9c88397b125d5ec5f65b1ed9300ba59d.
Commits from @umn.edu addresses have been found to be submitted in "bad faith" to try to test the kernel community's ability to review "known malicious" changes. The result of these submissions can be found in a paper published at the 42nd IEEE Symposium on Security and Privacy entitled, "Open Source Insecurity: Stealthily Introducing Vulnerabilities via Hypocrite Commits" written by Qiushi Wu (University of Minnesota) and Kangjie Lu (University of Minnesota).
Because of this, all submissions from this group must be reverted from the kernel tree and will need to be re-reviewed again to determine if they actually are a valid fix. Until that work is complete, remove this change to ensure that no problems are being introduced into the codebase.
Cc: Aditya Pakki <pakki001@umn.edu> Cc: Daniel Borkmann <daniel@iogearbox.net> Cc: https Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> --- kernel/bpf/core.c | 2 ++ 1 file changed, 2 insertions(+)
diff --git a/kernel/bpf/core.c b/kernel/bpf/core.c index 75244ecb2389..da29211ea5d8 100644 --- a/kernel/bpf/core.c +++ b/kernel/bpf/core.c @@ -230,6 +230,8 @@ struct bpf_prog *bpf_prog_realloc(struct bpf_prog *fp_old, unsigned int size, struct bpf_prog *fp; u32 pages; + BUG_ON(fp_old == NULL); + size = round_up(size, PAGE_SIZE); pages = size / PAGE_SIZE; if (pages <= fp_old->pages) -- 2.31.1
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