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linux: Check for copyout errors in linux_fixup()

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This is in preparation for annotating copyin() and related functions
with __result_use_check.

Reviewed by:	olce, dchagin
MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D43104
This commit is contained in:
Mark Johnston 2023-12-25 20:40:05 -05:00
parent 7b68fb5ab2
commit 3fde275167
1 changed files with 6 additions and 3 deletions
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9
sys/i386/linux/linux_sysvec.c
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@ -126,11 +126,14 @@ linux_fixup(uintptr_t *stack_base, struct image_params *imgp)
argv = base;
envp = base + (imgp->args->argc + 1);
base--;
suword(base, (intptr_t)envp);
if (suword(base, (intptr_t)envp) != 0)
return (EFAULT);
base--;
suword(base, (intptr_t)argv);
if (suword(base, (intptr_t)argv) != 0)
return (EFAULT);
base--;
suword(base, imgp->args->argc);
if (suword(base, imgp->args->argc) != 0)
return (EFAULT);
*stack_base = (uintptr_t)base;
return (0);
}