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Shared memory objects that have size which is not necessarily equal to

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exact multiple of system page size should still be allowed to be mapped
in their entirety to match the regular vnode backed file behavior.

Reported by: ed
Reviewed by: jhb
This commit is contained in:
Alexander Kabaev 2008-12-01 22:33:50 +00:00
parent 24b410f8fe
commit 6ee7dd87ba
1 changed files with 2 additions and 1 deletions
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3
sys/kern/uipc_shm.c
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@ -605,7 +605,8 @@ shm_mmap(struct shmfd *shmfd, vm_size_t objsize, vm_ooffset_t foff,
* XXXRW: This validation is probably insufficient, and subject to
* sign errors. It should be fixed.
*/
if (foff >= shmfd->shm_size || foff + objsize > shmfd->shm_size)
if (foff >= shmfd->shm_size ||
foff + objsize > round_page(shmfd->shm_size))
return (EINVAL);
mtx_lock(&shm_timestamp_lock);