Description
In the Linux kernel, the following vulnerability has been resolved: RDMA/umad: Reject negative data_len in ib_umad_write ib_umad_write computes data_len from user-controlled count and the MAD header sizes. With a mismatched user MAD header size and RMPP header length, data_len can become negative and reach ib_create_send_mad(). This can make the padding calculation exceed the segment size and trigger an out-of-bounds memset in alloc_send_rmpp_list(). Add an explicit check to reject negative data_len before creating the send buffer. KASAN splat: [ 211.363464] BUG: KASAN: slab-out-of-bounds in ib_create_send_mad+0xa01/0x11b0 [ 211.364077] Write of size 220 at addr ffff88800c3fa1f8 by task spray_thread/102 [ 211.365867] ib_create_send_mad+0xa01/0x11b0 [ 211.365887] ib_umad_write+0x853/0x1c80
Product status
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 1371ef6b1ecf3676b8942f5dfb3634fb0648128e
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 362e45fd9069ffa1523f9f1633b606ebf72060d7
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 6eb2919474ca105c5b13d19574e25f0ddcf19ca2
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 9c80d688f402539dfc8f336de1380d6b4ee14316
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 205955f29c26330b1dc7fdeadd5bb97c38e26f56
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b
2be8e3ee8efd6f99ce454115c29d09750915021a (git) before 5551b02fdbfd85a325bb857f3a8f9c9f33397ed2
2.6.24
Any version before 2.6.24
5.10.252 (semver)
5.15.202 (semver)
6.1.165 (semver)
6.6.128 (semver)
6.12.75 (semver)
6.18.14 (semver)
6.19.4 (semver)
7.0 (original_commit_for_fix)
References
git.kernel.org/...c/1371ef6b1ecf3676b8942f5dfb3634fb0648128e
git.kernel.org/...c/362e45fd9069ffa1523f9f1633b606ebf72060d7
git.kernel.org/...c/6eb2919474ca105c5b13d19574e25f0ddcf19ca2
git.kernel.org/...c/a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d
git.kernel.org/...c/9c80d688f402539dfc8f336de1380d6b4ee14316
git.kernel.org/...c/205955f29c26330b1dc7fdeadd5bb97c38e26f56
git.kernel.org/...c/52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b
git.kernel.org/...c/5551b02fdbfd85a325bb857f3a8f9c9f33397ed2