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libceph: check pointer before assigned to "c->rules[]"

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It should be better to check pointer firstly, then assign it
to c->rules[]. Refine code a little bit.

Signed-off-by: Li Qiong <liqiong@nfschina.com>
Reviewed-by: Ilya Dryomov <idryomov@gmail.com>
Signed-off-by: Ilya Dryomov <idryomov@gmail.com>
This commit is contained in:
Li Qiong 2022-06-14 15:10:59 +08:00 committed by Ilya Dryomov
parent 4849077604
commit fc54cb8d87
1 changed files with 1 additions and 1 deletions
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2
net/ceph/osdmap.c
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@ -571,10 +571,10 @@ static struct crush_map *crush_decode(void *pbyval, void *end)
goto bad;
#endif
r = kmalloc(struct_size(r, steps, yes), GFP_NOFS);
c->rules[i] = r;
if (r == NULL)
goto badmem;
dout(" rule %d is at %p\n", i, r);
c->rules[i] = r;
r->len = yes;
ceph_decode_copy_safe(p, end, &r->mask, 4, bad); /* 4 u8's */
ceph_decode_need(p, end, r->len*3*sizeof(u32), bad);