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Fix NULL pointer dereference in zio_ready() 

Clang's static analyzer correctly identified a NULL pointer dereference
in zio_ready() when ZIO_FLAG_NODATA has been set on a zio that is
missing a block pointer. The NULL pointer dereference occurs because we
have logic intended to disable ZIO_FLAG_NODATA when it has been set on a
gang block.

Reviewed-by: Brian Behlendorf <behlendorf1@llnl.gov>
Reviewed-by: Brian Atkinson <batkinson@lanl.gov>
Signed-off-by: Richard Yao <richard.yao@alumni.stonybrook.edu>
Closes #14469
This commit is contained in:
Richard Yao 2023-02-23 13:19:08 -05:00 committed by GitHub
parent c9e39da9a4
commit 7cb67d627c
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1 changed files with 1 additions and 1 deletions
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module/zfs/zio.c
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@ -4431,7 +4431,7 @@ zio_ready(zio_t *zio)
}
if (zio->io_flags & ZIO_FLAG_NODATA) {
if (BP_IS_GANG(bp)) {
if (bp != NULL && BP_IS_GANG(bp)) {
zio->io_flags &= ~ZIO_FLAG_NODATA;
} else {
ASSERT((uintptr_t)zio->io_abd < SPA_MAXBLOCKSIZE);