Re: [PATCH] bpf: Fix backport of "bpf: restrict unknown scalars of mixed signed bounds for unprivileged"
From: Yonghong Song <hidden>
Date: 2021-04-20 00:37:34
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bpf, lkml
On 4/19/21 4:56 PM, Samuel Mendoza-Jonas wrote:
The 4.14 backport of 9d7eceede ("bpf: restrict unknown scalars of mixed
signed bounds for unprivileged") adds the PTR_TO_MAP_VALUE check to the
wrong location in adjust_ptr_min_max_vals(), most likely because 4.14
doesn't include the commit that updates the if-statement to a
switch-statement (aad2eeaf4 "bpf: Simplify ptr_min_max_vals adjustment").
Move the check to the proper location in adjust_ptr_min_max_vals().
Fixes: 17efa65350c5a ("bpf: restrict unknown scalars of mixed signed bounds for unprivileged")
Signed-off-by: Samuel Mendoza-Jonas <redacted>
Reviewed-by: Frank van der Linden <redacted>
Reviewed-by: Ethan Chen <redacted>Just to be clear, the patch is for 4.14 stable branch. Acked-by: Yonghong Song <redacted>