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e887544d76
Prepare for the coming implementation by GCC and Clang of the __counted_by attribute. Flexible array members annotated with __counted_by can have their accesses bounds-checked at run-time checking via CONFIG_UBSAN_BOUNDS (for array indexing) and CONFIG_FORTIFY_SOURCE (for strcpy/memcpy-family functions). As found with Coccinelle[1], add __counted_by for struct linear_conf. Additionally, since the element count member must be set before accessing the annotated flexible array member, move its initialization earlier. [1] https://github.com/kees/kernel-tools/blob/trunk/coccinelle/examples/counted_by.cocci Cc: Song Liu <song@kernel.org> Cc: linux-raid@vger.kernel.org Signed-off-by: Kees Cook <keescook@chromium.org> Reviewed-by: Gustavo A. R. Silva <gustavoars@kernel.org> Signed-off-by: Song Liu <song@kernel.org> Link: https://lore.kernel.org/r/20230915200328.never.064-kees@kernel.org
17 lines
328 B
C
17 lines
328 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINEAR_H
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#define _LINEAR_H
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struct dev_info {
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struct md_rdev *rdev;
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sector_t end_sector;
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};
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struct linear_conf
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{
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struct rcu_head rcu;
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sector_t array_sectors;
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int raid_disks; /* a copy of mddev->raid_disks */
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struct dev_info disks[] __counted_by(raid_disks);
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};
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#endif
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