| Message ID | 20240702231303.3077584-1-zheyuma97@gmail.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | hw/nvme: Fix memory leak in nvme_dsm | expand |
> -----Original Message----- > From: qemu-devel-bounces+yaoxt.fnst=fujitsu.com@nongnu.org > <qemu-devel-bounces+yaoxt.fnst=fujitsu.com@nongnu.org> On Behalf Of Zheyu > Ma > Sent: Wednesday, July 3, 2024 7:13 AM > To: Keith Busch <kbusch@kernel.org>; Klaus Jensen <its@irrelevant.dk>; Jesper > Devantier <foss@defmacro.it> > Cc: Zheyu Ma <zheyuma97@gmail.com>; qemu-block@nongnu.org; > qemu-devel@nongnu.org > Subject: [PATCH] hw/nvme: Fix memory leak in nvme_dsm > > The allocated memory to hold LBA ranges leaks in the nvme_dsm function. This > happens because the allocated memory for iocb->range is not freed in all > error handling paths. > > Fix this by adding a free to ensure that the allocated memory is properly freed. > > ASAN log: > ==3075137==ERROR: LeakSanitizer: detected memory leaks > > Direct leak of 480 byte(s) in 6 object(s) allocated from: > #0 0x55f1f8a0eddd in malloc > llvm/compiler-rt/lib/asan/asan_malloc_linux.cpp:129:3 > #1 0x7f531e0f6738 in g_malloc > (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x5e738) > #2 0x55f1faf1f091 in blk_aio_get block/block-backend.c:2583:12 > #3 0x55f1f945c74b in nvme_dsm hw/nvme/ctrl.c:2609:30 > #4 0x55f1f945831b in nvme_io_cmd hw/nvme/ctrl.c:4470:16 > #5 0x55f1f94561b7 in nvme_process_sq hw/nvme/ctrl.c:7039:29 > > Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> > --- > hw/nvme/ctrl.c | 1 + > 1 file changed, 1 insertion(+) > > diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c > index 127c3d2383..cf610eab21 100644 > --- a/hw/nvme/ctrl.c > +++ b/hw/nvme/ctrl.c > @@ -2592,6 +2592,7 @@ next: > done: > iocb->aiocb = NULL; > iocb->common.cb(iocb->common.opaque, iocb->ret); > + g_free(iocb->range); > qemu_aio_unref(iocb); > } > > -- > 2.34.1 > Reviewed-by: Xingtao Yao <yaoxt.fnst@fujitsu.com>
diff --git a/hw/nvme/ctrl.c b/hw/nvme/ctrl.c index 127c3d2383..cf610eab21 100644 --- a/hw/nvme/ctrl.c +++ b/hw/nvme/ctrl.c @@ -2592,6 +2592,7 @@ next: done: iocb->aiocb = NULL; iocb->common.cb(iocb->common.opaque, iocb->ret); + g_free(iocb->range); qemu_aio_unref(iocb); }
The allocated memory to hold LBA ranges leaks in the nvme_dsm function. This happens because the allocated memory for iocb->range is not freed in all error handling paths. Fix this by adding a free to ensure that the allocated memory is properly freed. ASAN log: ==3075137==ERROR: LeakSanitizer: detected memory leaks Direct leak of 480 byte(s) in 6 object(s) allocated from: #0 0x55f1f8a0eddd in malloc llvm/compiler-rt/lib/asan/asan_malloc_linux.cpp:129:3 #1 0x7f531e0f6738 in g_malloc (/lib/x86_64-linux-gnu/libglib-2.0.so.0+0x5e738) #2 0x55f1faf1f091 in blk_aio_get block/block-backend.c:2583:12 #3 0x55f1f945c74b in nvme_dsm hw/nvme/ctrl.c:2609:30 #4 0x55f1f945831b in nvme_io_cmd hw/nvme/ctrl.c:4470:16 #5 0x55f1f94561b7 in nvme_process_sq hw/nvme/ctrl.c:7039:29 Signed-off-by: Zheyu Ma <zheyuma97@gmail.com> --- hw/nvme/ctrl.c | 1 + 1 file changed, 1 insertion(+)