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a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1731336738; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding; bh=wPf3EusIvQUP5CbuI5hx2eO4SVkYd5Ku04n6CjnmX4Y=; b=0AnMPpbx1PbGP4Xvn/ffH0if/fMz3rBJaf4hdZX2+cDIQe5F0AoGAoZBSFxhVnhrLJD/L1 SQRA87weQR50giBQ== From: Fabiano Rosas To: qemu-devel@nongnu.org Cc: qemu-block@nongnu.org, Kevin Wolf , Hanna Reitz Subject: [PATCH] block: Fix leak in send_qmp_error_event Date: Mon, 11 Nov 2024 11:52:14 -0300 Message-Id: <20241111145214.8261-1-farosas@suse.de> X-Mailer: git-send-email 2.35.3 MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Rspamd-Queue-Id: 9DD991F38E X-Spamd-Result: default: False [-3.01 / 50.00]; BAYES_HAM(-3.00)[99.99%]; NEURAL_HAM_LONG(-1.00)[-1.000]; MID_CONTAINS_FROM(1.00)[]; R_MISSING_CHARSET(0.50)[]; R_DKIM_ALLOW(-0.20)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; NEURAL_HAM_SHORT(-0.20)[-1.000]; 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charset="utf-8" ASAN detected a leak when running the ahci-test /ahci/io/dma/lba28/retry: Direct leak of 35 byte(s) in 1 object(s) allocated from: #0 in malloc #1 in __vasprintf_internal #2 in vasprintf #3 in g_vasprintf #4 in g_strdup_vprintf #5 in g_strdup_printf #6 in object_get_canonical_path ../qom/object.c:2096:19 #7 in blk_get_attached_dev_id_or_path ../block/block-backend.c:1033:12 #8 in blk_get_attached_dev_path ../block/block-backend.c:1047:12 #9 in send_qmp_error_event ../block/block-backend.c:2140:36 #10 in blk_error_action ../block/block-backend.c:2172:9 #11 in ide_handle_rw_error ../hw/ide/core.c:875:5 #12 in ide_dma_cb ../hw/ide/core.c:894:13 #13 in dma_complete ../system/dma-helpers.c:107:9 #14 in dma_blk_cb ../system/dma-helpers.c:129:9 #15 in blk_aio_complete ../block/block-backend.c:1552:9 #16 in blk_aio_write_entry ../block/block-backend.c:1619:5 #17 in coroutine_trampoline ../util/coroutine-ucontext.c:175:9 Plug the leak by freeing the device path string. Signed-off-by: Fabiano Rosas Reviewed-by: Philippe Mathieu-Daud=C3=A9 --- block/block-backend.c | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/block/block-backend.c b/block/block-backend.c index 85bcdedcef..a3b7f00188 100644 --- a/block/block-backend.c +++ b/block/block-backend.c @@ -2134,13 +2134,14 @@ static void send_qmp_error_event(BlockBackend *blk, { IoOperationType optype; BlockDriverState *bs =3D blk_bs(blk); + char *path =3D blk_get_attached_dev_path(blk); =20 optype =3D is_read ? IO_OPERATION_TYPE_READ : IO_OPERATION_TYPE_WRITE; - qapi_event_send_block_io_error(blk_name(blk), - blk_get_attached_dev_path(blk), + qapi_event_send_block_io_error(blk_name(blk), path, bs ? bdrv_get_node_name(bs) : NULL, opt= ype, action, blk_iostatus_is_enabled(blk), error =3D=3D ENOSPC, strerror(error)); + g_free(path); } =20 /* This is done by device models because, while the block layer knows --=20 2.35.3