Linux RDMA/siw Patch: Add sendpage_ok() check to disable MSG_SPLICE_PAGES

From this webpage screenshot, we can extract the following key information about the vulnerability: 1. Vulnerability Description: - RDMA/siw: Add sendpage_ok() check to disable MSG_SPLICE_PAGES - When running ISER (InfiniBand Simple Interface for RDMA), an initiator encounters a warning indicating that a slab page is being used in send_page from skb_splice_from_iter(). - To resolve this issue, it is recommended to add a sendpage_ok() check in the driver; if it returns 0, disable the MSG_SPLICE_PAGES flag before entering the network stack. 2. Warning Message: - WARNING: CPU: 0 PID: 5342 at net/core/skbuff.c:7140 skb_splice_from_iter+0x173/0x320 - Call Trace: - tcp_sendmsg_locked+0x368/0xe40 - siw_tx_hdt+0x695/0xa40 [siw] - siw_qp_sq_process+0x102/0xb00 [siw] - siw_sq_resume+0x39/0x110 [siw] - siw_run_sq+0x74/0x160 [siw] - kthread+0xd2/0x100 - ret_from_fork+0x34/0x40 - ret_from_fork_asm+0x1a/0x30 3. Patch Link: - https://patch.msgid.link/r/20241007125835.89942-1-showrya@chelsio.com 4. Sign-offs: - Signed-off-by: Showrya M N - Signed-off-by: Potnuri Bharat Teja - Signed-off-by: Jason Gunthorpe 5. Diffstat: - 1 file changed, 2 insertions, 0 deletions - The diff is located in drivers/infiniband/sw/siw/siw_qp_tx.c 6. Patch Content: - Adds a sendpage_ok() check; if it returns 0, disables the MSG_SPLICE_PAGES flag. This information indicates that this is a vulnerability related to RDMA/siw, involving improper use of slab pages during page sending, and provides a patch to fix the issue.

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Linux RDMA/siw Patch: Add sendpage_ok() check to disable MSG_SPLICE_PAGES