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Fix zdb -E segfault

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SPA_MAXBLOCKSIZE is too large for stack.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: loli10K <ezomori.nozomu@gmail.com>
Signed-off-by: Chunwei Chen <david.chen@nutanix.com>
Closes #7099
This commit is contained in:
Chunwei Chen 2018-02-01 16:28:11 -08:00 committed by Brian Behlendorf
parent 950e17c215
commit 5e3bd0e684
1 changed files with 4 additions and 1 deletions
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5
cmd/zdb/zdb.c
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@ -4235,9 +4235,11 @@ zdb_embedded_block(char *thing)
{
blkptr_t bp;
unsigned long long *words = (void *)&bp;
char buf[SPA_MAXBLOCKSIZE];
char *buf;
int err;
buf = umem_alloc(SPA_MAXBLOCKSIZE, UMEM_NOFAIL);
bzero(&bp, sizeof (bp));
err = sscanf(thing, "%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx:"
"%llx:%llx:%llx:%llx:%llx:%llx:%llx:%llx",
@ -4256,6 +4258,7 @@ zdb_embedded_block(char *thing)
exit(1);
}
zdb_dump_block_raw(buf, BPE_GET_LSIZE(&bp), 0);
umem_free(buf, SPA_MAXBLOCKSIZE);
}
int