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| author | Peiyang He <peiyang_he@smail.nju.edu.cn> | 2026-07-27 13:06:59 +0800 |
|---|---|---|
| committer | Leon Romanovsky <leon@kernel.org> | 2026-07-28 08:03:10 -0400 |
| commit | 51f2c8d2c99fc1f452f7113c08a35edcc4bf8732 (patch) | |
| tree | ceeaca5bc1750959373f037dd84ff97350ac1619 /tools/perf/scripts/python/bin/task-analyzer-record | |
| parent | a1c0d4719b089e34c1c90c0404f414f9345997ad (diff) | |
RDMA/rxe: Fix UAF in ODP init error-handling path
rxe_odp_mr_init_user() stores &umem_odp->umem in mr->umem before
calling rxe_odp_init_pages(). If rxe_odp_init_pages() fails,
rxe_odp_mr_init_user() releases umem_odp and returns an error.
rxe_reg_user_mr() then unwinds the error through rxe_cleanup(),
rxe_mr_cleanup(), ib_umem_release(mr->umem). There is an
IS_ERR_OR_NULL(umem) check at the start of ib_umem_release().
But since mr->umem is NOT reset to NULL in the error handling
path of rxe_odp_mr_init_user(), the check passes and it reads
already-freed fields like umem->is_dmabuf, causing UAF.
Fix the UAF by clearing mr->umem after releasing the failed
ODP umem so the MR cleanup path does not release it again.
Fixes: d03fb5c6599e ("RDMA/rxe: Allow registering MRs for On-Demand Paging")
Assisted-by: Codex:gpt-5.6-sol
Signed-off-by: Peiyang He <peiyang_he@smail.nju.edu.cn>
Link: https://patch.msgid.link/70CB6DBCB19624C7+20260727050659.1543627-1-peiyang_he@smail.nju.edu.cn
Signed-off-by: Leon Romanovsky <leon@kernel.org>
Diffstat (limited to 'tools/perf/scripts/python/bin/task-analyzer-record')
0 files changed, 0 insertions, 0 deletions