On Sun, Sep 22, 2019 at 10:25:44PM +0200, Greg KH wrote:
On Sun, Sep 22, 2019 at 02:43:15PM -0400, Sasha Levin wrote:
From: Austin Kim austindh.kim@gmail.com
[ Upstream commit 864b23f0169d5bff677e8443a7a90dfd6b090afc ]
The result of kmalloc() should have been checked ahead of below statement:
pqp = (struct bau_pq_entry *)vp;
Move BUG_ON(!vp) before above statement.
Signed-off-by: Austin Kim austindh.kim@gmail.com Cc: Dimitri Sivanich dimitri.sivanich@hpe.com Cc: Hedi Berriche hedi.berriche@hpe.com Cc: Linus Torvalds torvalds@linux-foundation.org Cc: Mike Travis mike.travis@hpe.com Cc: Peter Zijlstra peterz@infradead.org Cc: Russ Anderson russ.anderson@hpe.com Cc: Steve Wahl steve.wahl@hpe.com Cc: Thomas Gleixner tglx@linutronix.de Cc: allison@lohutok.net Cc: andy@infradead.org Cc: armijn@tjaldur.nl Cc: bp@alien8.de Cc: dvhart@infradead.org Cc: gregkh@linuxfoundation.org Cc: hpa@zytor.com Cc: kjlu@umn.edu Cc: platform-driver-x86@vger.kernel.org Link: https://lkml.kernel.org/r/20190905232951.GA28779@LGEARND20B15 Signed-off-by: Ingo Molnar mingo@kernel.org Signed-off-by: Sasha Levin sashal@kernel.org
arch/x86/platform/uv/tlb_uv.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/arch/x86/platform/uv/tlb_uv.c b/arch/x86/platform/uv/tlb_uv.c index 20c389a91b803..5f0a96bf27a1f 100644 --- a/arch/x86/platform/uv/tlb_uv.c +++ b/arch/x86/platform/uv/tlb_uv.c @@ -1804,9 +1804,9 @@ static void pq_init(int node, int pnode)
plsize = (DEST_Q_SIZE + 1) * sizeof(struct bau_pq_entry); vp = kmalloc_node(plsize, GFP_KERNEL, node);
- pqp = (struct bau_pq_entry *)vp;
- BUG_ON(!pqp);
BUG_ON(!vp);
pqp = (struct bau_pq_entry *)vp; cp = (char *)pqp + 31; pqp = (struct bau_pq_entry *)(((unsigned long)cp >> 5) << 5);
How did this even get merged in the first place? I thought a number of us complained about it.
This isn't any change in code, and the original is just fine, the author didn't realize how C works :(
Please drop this.
Heh, I've dropped it.
-- Thanks, Sasha