Description
In the Linux kernel, the following vulnerability has been resolved: orangefs: fix double-free of trailer_buf on readdir copy failure On a readdir downcall, orangefs_devreq_write_iter() frees op->downcall.trailer_buf with vfree() when copy_from_iter_full() fails, but does not clear the pointer before goto Efault. The waiter in do_readdir() is then woken with a negative status and frees the same pointer again on its r < 0 path, causing a deterministic double-free. A client holding /dev/pvfs2-req triggers it by sending a readdir downcall whose declared trailer_size exceeds the bytes it supplies. Clear the pointer after freeing so the readdir-side vfree() becomes a no-op.
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
382f4581e67f57209c7aa67e39f26ba076306a2e to < 712c4235fcc73c11a2f1d59a499d489e49c374a4affected382f4581e67f57209c7aa67e39f26ba076306a2e to < 433c2e470053cc9c712314d3d8c3dfbc862d68ebaffected382f4581e67f57209c7aa67e39f26ba076306a2e to < 6e5924644ef4bce06a3cbb7cb841a8bbfdfc03adaffected382f4581e67f57209c7aa67e39f26ba076306a2e to < 9c9eacc47c618ed6d7d35fe75a40d294c8cdbffaaffected382f4581e67f57209c7aa67e39f26ba076306a2e to < 2f5454a25127854c232fde5d1d65d16fbcd42d43affected382f4581e67f57209c7aa67e39f26ba076306a2e to < f796f38a324e89547738f4b70cc33be5be2bc6daaffected382f4581e67f57209c7aa67e39f26ba076306a2e to < 519f4146b8b8c5f20c2ad01913acd6df2df8fc8eaffected382f4581e67f57209c7aa67e39f26ba076306a2e to < f574296be7f46eb60beca851240b526df232f480affected
Linux Linux
Default version status: affected
4.12affected0 to < 4.12unaffected5.10.270 to ≤ 5.10.*unaffected5.15.221 to ≤ 5.15.*unaffected6.1.188 to ≤ 6.1.*unaffected6.6.157 to ≤ 6.6.*unaffected6.12.109 to ≤ 6.12.*unaffected6.18.50 to ≤ 6.18.*unaffected7.2.4 to ≤ 7.2.*unaffected7.3 to ≤ *unaffected
References
- https://git.kernel.org/stable/c/712c4235fcc73c11a2f1d59a499d489e49c374a4 ↗
- https://git.kernel.org/stable/c/433c2e470053cc9c712314d3d8c3dfbc862d68eb ↗
- https://git.kernel.org/stable/c/6e5924644ef4bce06a3cbb7cb841a8bbfdfc03ad ↗
- https://git.kernel.org/stable/c/9c9eacc47c618ed6d7d35fe75a40d294c8cdbffa ↗
- https://git.kernel.org/stable/c/2f5454a25127854c232fde5d1d65d16fbcd42d43 ↗
- https://git.kernel.org/stable/c/f796f38a324e89547738f4b70cc33be5be2bc6da ↗
- https://git.kernel.org/stable/c/519f4146b8b8c5f20c2ad01913acd6df2df8fc8e ↗
- https://git.kernel.org/stable/c/f574296be7f46eb60beca851240b526df232f480 ↗