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
Affected products
Version statuses are supplied by the assigning organization. Consult the original record for detailed ranges and platform conditions.
Linux Linux
Default version status: unaffected
2be8e3ee8efd6f99ce454115c29d09750915021a to < 1371ef6b1ecf3676b8942f5dfb3634fb0648128eaffected2be8e3ee8efd6f99ce454115c29d09750915021a to < 362e45fd9069ffa1523f9f1633b606ebf72060d7affected2be8e3ee8efd6f99ce454115c29d09750915021a to < 6eb2919474ca105c5b13d19574e25f0ddcf19ca2affected2be8e3ee8efd6f99ce454115c29d09750915021a to < a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0daffected2be8e3ee8efd6f99ce454115c29d09750915021a to < 9c80d688f402539dfc8f336de1380d6b4ee14316affected2be8e3ee8efd6f99ce454115c29d09750915021a to < 205955f29c26330b1dc7fdeadd5bb97c38e26f56affected2be8e3ee8efd6f99ce454115c29d09750915021a to < 52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34baffected2be8e3ee8efd6f99ce454115c29d09750915021a to < 5551b02fdbfd85a325bb857f3a8f9c9f33397ed2affected
Linux Linux
Default version status: affected
2.6.24affected0 to < 2.6.24unaffected5.10.252 to ≤ 5.10.*unaffected5.15.202 to ≤ 5.15.*unaffected6.1.165 to ≤ 6.1.*unaffected6.6.128 to ≤ 6.6.*unaffected6.12.75 to ≤ 6.12.*unaffected6.18.14 to ≤ 6.18.*unaffected6.19.4 to ≤ 6.19.*unaffected7.0 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/1371ef6b1ecf3676b8942f5dfb3634fb0648128e ↗
- https://git.kernel.org/stable/c/362e45fd9069ffa1523f9f1633b606ebf72060d7 ↗
- https://git.kernel.org/stable/c/6eb2919474ca105c5b13d19574e25f0ddcf19ca2 ↗
- https://git.kernel.org/stable/c/a6a3e4af10993cb9e4b8f0548680aba0ab5f3b0d ↗
- https://git.kernel.org/stable/c/9c80d688f402539dfc8f336de1380d6b4ee14316 ↗
- https://git.kernel.org/stable/c/205955f29c26330b1dc7fdeadd5bb97c38e26f56 ↗
- https://git.kernel.org/stable/c/52ab82cc5cf8ada5c3fb6ffe8f32fdb2fc27a34b ↗
- https://git.kernel.org/stable/c/5551b02fdbfd85a325bb857f3a8f9c9f33397ed2 ↗
- https://cert-portal.siemens.com/productcert/html/ssa-082556.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-019113.html ↗
- https://cert-portal.siemens.com/productcert/html/ssa-457936.html ↗