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stats: Check for errors from copyout()

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

MFC after:	1 week
Differential Revision:	https://reviews.freebsd.org/D43179
This commit is contained in:
Mark Johnston 2024-01-04 08:33:58 -05:00
parent 969fc09134
commit a0993376ec
1 changed files with 14 additions and 4 deletions
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18
sys/kern/subr_stats.c
View file

@ -1107,13 +1107,19 @@ stats_v1_blob_clone(struct statsblobv1 **dst, size_t dstmaxsz,
*/
#ifdef _KERNEL
if (flags & SB_CLONE_USRDSTNOFAULT)
copyout_nofault(src, *dst,
error = copyout_nofault(src, *dst,
offsetof(struct statsblob, maxsz));
else if (flags & SB_CLONE_USRDST)
copyout(src, *dst, offsetof(struct statsblob, maxsz));
error = copyout(src, *dst,
offsetof(struct statsblob, maxsz));
else
#endif
memcpy(*dst, src, offsetof(struct statsblob, maxsz));
#ifdef _KERNEL
if (error != 0)
goto out;
#endif
if (dstmaxsz >= src->cursz) {
postcurszlen = src->cursz -
@ -1125,14 +1131,18 @@ stats_v1_blob_clone(struct statsblobv1 **dst, size_t dstmaxsz,
}
#ifdef _KERNEL
if (flags & SB_CLONE_USRDSTNOFAULT)
copyout_nofault(&(src->cursz), &((*dst)->cursz),
error = copyout_nofault(&(src->cursz), &((*dst)->cursz),
postcurszlen);
else if (flags & SB_CLONE_USRDST)
copyout(&(src->cursz), &((*dst)->cursz), postcurszlen);
error = copyout(&(src->cursz), &((*dst)->cursz),
postcurszlen);
else
#endif
memcpy(&((*dst)->cursz), &(src->cursz), postcurszlen);
}
#ifdef _KERNEL
out:
#endif
return (error);
}