From: Julia Lawall <julia@xxxxxxx> In fs/cifs/cifssmb.c, pLockData is tested for being NULL at the beginning of the function, and not reassigned subsequently. In fs/xfs/xfs_trans_buf.c, bp is tested for being NULL just a few lines above. A simplified version of the semantic patch that makes this change is as follows: (http://www.emn.fr/x-info/coccinelle/) // <smpl> @r exists@ local idexpression x; expression E; position p1,p2; @@ if (x@p1 == NULL || ...) { ... when forall return ...; } ... when != \(x=E\|x--\|x++\|--x\|++x\|x-=E\|x+=E\|x|=E\|x&=E\|&x\) ( x@p2 == NULL | x@p2 != NULL ) // another path to the test that is not through p1? @s exists@ local idexpression r.x; position r.p1,r.p2; @@ ... when != x@p1 ( x@p2 == NULL | x@p2 != NULL ) @fix depends on !s@ position r.p1,r.p2; expression x,E; statement S1,S2; @@ ( - if ((x@p2 != NULL) || ...) S1 | - if ((x@p2 == NULL) && ...) S1 | - BUG_ON(x@p2 == NULL); ) // </smpl> Signed-off-by: Julia Lawall <julia@xxxxxxx> --- fs/cifs/cifssmb.c | 4 ---- 1 files changed, 0 insertions(+), 4 deletions(-) diff --git a/fs/cifs/cifssmb.c b/fs/cifs/cifssmb.c index 824df14..552642a 100644 --- a/fs/cifs/cifssmb.c +++ b/fs/cifs/cifssmb.c @@ -1871,10 +1871,6 @@ CIFSSMBPosixLock(const int xid, struct cifsTconInfo *tcon, rc = -EIO; /* bad smb */ goto plk_err_exit; } - if (pLockData == NULL) { - rc = -EINVAL; - goto plk_err_exit; - } data_offset = le16_to_cpu(pSMBr->t2.DataOffset); data_count = le16_to_cpu(pSMBr->t2.DataCount); if (data_count < sizeof(struct cifs_posix_lock)) { -- To unsubscribe from this list: send the line "unsubscribe kernel-janitors" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
