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From: Keith Packard <keithp@keithp.com>
To: Johannes Berg <johannes@sipsolutions.net>,
	Kees Cook <keescook@chromium.org>
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Subject: Re: [PATCH 02/32] Introduce flexible array struct memcpy() helpers
Date: Thu, 05 May 2022 08:16:11 -0700	[thread overview]
Message-ID: <871qx8qabo.fsf@keithp.com> (raw)
In-Reply-To: <970a674df04271b5fd1971b495c6b11a996c20c2.camel@sipsolutions.net>

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Johannes Berg <johannes@sipsolutions.net> writes:

> Yeah, dunno, I guess I'm slightly more on the side of not requiring it,
> since we don't do the same for kmalloc() etc. and probably really
> wouldn't want to add kmalloc_s() that does it ;-)

I suspect the number of bugs this catches will be small, but they'll be
in places where the flow of control is complicated. What we want is to
know that there's no "real" value already present. I'd love it if we
could make the macro declare a new name (yeah, I know, mixing
declarations and code).

Of course, we could also end up with people writing a wrapping macro
that sets the variable to NULL before invoking the underlying macro...

-- 
-keith

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  reply	other threads:[~2022-05-05 15:26 UTC|newest]

Thread overview: 71+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-05-04  1:44 [PATCH 00/32] " Kees Cook
2022-05-04  1:44 ` [PATCH 01/32] netlink: Avoid memcpy() across flexible array boundary Kees Cook
2022-05-04  3:12   ` Introduce flexible array struct memcpy() helpers bluez.test.bot
2022-05-04  3:31   ` [PATCH 01/32] netlink: Avoid memcpy() across flexible array boundary Gustavo A. R. Silva
2022-05-04  3:37     ` Kees Cook
2022-05-04  1:44 ` [PATCH 02/32] Introduce flexible array struct memcpy() helpers Kees Cook
2022-05-04  7:25   ` Johannes Berg
2022-05-04 15:38     ` Kees Cook
2022-05-04 16:08       ` David Laight
2022-05-05 13:16       ` Johannes Berg
2022-05-05 15:16         ` Keith Packard [this message]
2022-05-05 19:32           ` Kees Cook
2022-05-05 20:08             ` Keith Packard
2022-05-05 20:12               ` Johannes Berg
2022-05-06 11:15                 ` David Laight
2022-05-06 11:15                   ` David Laight
2022-05-05 19:27         ` Kees Cook
2022-05-04  1:44 ` [PATCH 03/32] flex_array: Add Kunit tests Kees Cook
2022-05-04  3:00   ` David Gow
2022-05-04 19:43     ` Kees Cook
2022-05-04 19:58   ` Daniel Latypov
2022-05-04  1:44 ` [PATCH 04/32] fortify: Add run-time WARN for cross-field memcpy() Kees Cook
2022-05-04  1:44 ` [PATCH 05/32] brcmfmac: Use mem_to_flex_dup() with struct brcmf_fweh_queue_item Kees Cook
2022-05-16 12:49   ` Arend van Spriel
2022-05-17  3:57     ` Kees Cook
2022-05-04  1:44 ` [PATCH 06/32] iwlwifi: calib: Prepare to use mem_to_flex_dup() Kees Cook
2022-05-04  1:44 ` [PATCH 07/32] iwlwifi: calib: Use mem_to_flex_dup() with struct iwl_calib_result Kees Cook
2022-05-04  1:44 ` [PATCH 08/32] iwlwifi: mvm: Use mem_to_flex_dup() with struct ieee80211_key_conf Kees Cook
2022-05-04  1:44 ` [PATCH 09/32] p54: Use mem_to_flex_dup() with struct p54_cal_database Kees Cook
2022-05-04  1:44 ` [PATCH 10/32] wcn36xx: Use mem_to_flex_dup() with struct wcn36xx_hal_ind_msg Kees Cook
2022-05-04  5:42   ` Kalle Valo
2022-05-04 15:08     ` Kees Cook
2022-05-04  1:44 ` [PATCH 11/32] nl80211: Use mem_to_flex_dup() with struct cfg80211_cqm_config Kees Cook
2022-05-04  1:44 ` [PATCH 12/32] cfg80211: Use mem_to_flex_dup() with struct cfg80211_bss_ies Kees Cook
2022-05-04  7:28   ` Johannes Berg
2022-05-04 15:13     ` Kees Cook
2022-05-04  1:44 ` [PATCH 13/32] mac80211: Use mem_to_flex_dup() with several structs Kees Cook
2022-05-04  1:44 ` [PATCH 14/32] af_unix: Use mem_to_flex_dup() with struct unix_address Kees Cook
2022-05-04  1:44 ` [PATCH 15/32] 802/garp: Use mem_to_flex_dup() with struct garp_attr Kees Cook
2022-05-04  1:44 ` [PATCH 16/32] 802/mrp: Use mem_to_flex_dup() with struct mrp_attr Kees Cook
2022-05-04  1:44 ` [PATCH 17/32] net/flow_offload: Use mem_to_flex_dup() with struct flow_action_cookie Kees Cook
2022-05-04  1:44 ` [PATCH 18/32] firewire: Use __mem_to_flex_dup() with struct iso_interrupt_event Kees Cook
2022-05-04  1:44 ` [PATCH 19/32] afs: Use mem_to_flex_dup() with struct afs_acl Kees Cook
2022-05-04  1:44 ` [PATCH 20/32] ASoC: sigmadsp: Use mem_to_flex_dup() with struct sigmadsp_data Kees Cook
2022-05-04 15:17   ` Mark Brown
2022-05-04  1:44 ` [PATCH 21/32] soc: qcom: apr: Use mem_to_flex_dup() with struct apr_rx_buf Kees Cook
2022-05-04  1:44 ` [PATCH 22/32] atags_proc: Use mem_to_flex_dup() with struct buffer Kees Cook
2022-05-04  1:44 ` [PATCH 23/32] Bluetooth: Use mem_to_flex_dup() with struct hci_op_configure_data_path Kees Cook
2022-05-04  1:44 ` [PATCH 24/32] IB/hfi1: Use mem_to_flex_dup() for struct tid_rb_node Kees Cook
2022-05-04  1:44 ` [PATCH 25/32] Drivers: hv: utils: Use mem_to_flex_dup() with struct cn_msg Kees Cook
2022-05-04  1:44 ` [PATCH 26/32] ima: Use mem_to_flex_dup() with struct modsig Kees Cook
2022-05-04  1:44 ` [PATCH 27/32] KEYS: Use mem_to_flex_dup() with struct user_key_payload Kees Cook
2022-05-04  1:44 ` [PATCH 28/32] selinux: Use mem_to_flex_dup() with xfrm and sidtab Kees Cook
2022-05-04 22:57   ` Paul Moore
2022-05-04 23:43     ` Gustavo A. R. Silva
2022-05-05  3:14       ` Paul Moore
2022-05-05 18:39         ` Kees Cook
2022-05-05 23:16           ` Paul Moore
2022-05-06  1:08             ` Gustavo A. R. Silva
2022-05-04  1:44 ` [PATCH 29/32] xtensa: Use mem_to_flex_dup() with struct property Kees Cook
2022-05-04 18:09   ` Rob Herring
2022-05-04 18:09     ` Rob Herring
2022-05-04  1:44 ` [PATCH 30/32] usb: gadget: f_fs: Use mem_to_flex_dup() with struct ffs_buffer Kees Cook
2022-05-04  1:44 ` [PATCH 31/32] xenbus: Use mem_to_flex_dup() with struct read_buffer Kees Cook
2022-05-04  1:44 ` [PATCH 32/32] esas2r: Use __mem_to_flex() with struct atto_ioctl Kees Cook
2022-05-12 21:41 ` [PATCH 19/32] afs: Use mem_to_flex_dup() with struct afs_acl David Howells
2022-05-12 21:41   ` David Howells
2022-05-13 15:44   ` Kees Cook
2022-05-13 15:44     ` Kees Cook
2022-05-12 21:47 ` [PATCH 00/32] Introduce flexible array struct memcpy() helpers David Howells
2022-05-12 21:47   ` David Howells

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