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authorKees Cook <[email protected]>2021-08-09 11:29:33 -0700
committerKees Cook <[email protected]>2021-10-18 12:28:53 -0700
commitfa7845cfd53f3b1d3f60efa55db89805595bc045 (patch)
treed33f2a99d7e8e1c549732857d483ee08d87e9183 /include/linux/compiler-gcc.h
parent3080ea5553cc909b000d1f1d964a9041962f2c5b (diff)
treewide: Replace open-coded flex arrays in unions
In support of enabling -Warray-bounds and -Wzero-length-bounds and correctly handling run-time memcpy() bounds checking, replace all open-coded flexible arrays (i.e. 0-element arrays) in unions with the DECLARE_FLEX_ARRAY() helper macro. This fixes warnings such as: fs/hpfs/anode.c: In function 'hpfs_add_sector_to_btree': fs/hpfs/anode.c:209:27: warning: array subscript 0 is outside the bounds of an interior zero-length array 'struct bplus_internal_node[0]' [-Wzero-length-bounds] 209 | anode->btree.u.internal[0].down = cpu_to_le32(a); | ~~~~~~~~~~~~~~~~~~~~~~~^~~ In file included from fs/hpfs/hpfs_fn.h:26, from fs/hpfs/anode.c:10: fs/hpfs/hpfs.h:412:32: note: while referencing 'internal' 412 | struct bplus_internal_node internal[0]; /* (internal) 2-word entries giving | ^~~~~~~~ drivers/net/can/usb/etas_es58x/es58x_fd.c: In function 'es58x_fd_tx_can_msg': drivers/net/can/usb/etas_es58x/es58x_fd.c:360:35: warning: array subscript 65535 is outside the bounds of an interior zero-length array 'u8[0]' {aka 'unsigned char[]'} [-Wzero-length-bounds] 360 | tx_can_msg = (typeof(tx_can_msg))&es58x_fd_urb_cmd->raw_msg[msg_len]; | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ In file included from drivers/net/can/usb/etas_es58x/es58x_core.h:22, from drivers/net/can/usb/etas_es58x/es58x_fd.c:17: drivers/net/can/usb/etas_es58x/es58x_fd.h:231:6: note: while referencing 'raw_msg' 231 | u8 raw_msg[0]; | ^~~~~~~ Cc: "Gustavo A. R. Silva" <[email protected]> Cc: Arnd Bergmann <[email protected]> Cc: Ayush Sawal <[email protected]> Cc: Vinay Kumar Yadav <[email protected]> Cc: Rohit Maheshwari <[email protected]> Cc: Herbert Xu <[email protected]> Cc: "David S. Miller" <[email protected]> Cc: Kalle Valo <[email protected]> Cc: Jakub Kicinski <[email protected]> Cc: Stanislaw Gruszka <[email protected]> Cc: Luca Coelho <[email protected]> Cc: "James E.J. Bottomley" <[email protected]> Cc: "Martin K. Petersen" <[email protected]> Cc: Alexei Starovoitov <[email protected]> Cc: Daniel Borkmann <[email protected]> Cc: Andrii Nakryiko <[email protected]> Cc: Martin KaFai Lau <[email protected]> Cc: Song Liu <[email protected]> Cc: Yonghong Song <[email protected]> Cc: John Fastabend <[email protected]> Cc: KP Singh <[email protected]> Cc: Johannes Berg <[email protected]> Cc: Mordechay Goodstein <[email protected]> Cc: Lee Jones <[email protected]> Cc: Wolfgang Grandegger <[email protected]> Cc: Marc Kleine-Budde <[email protected]> Cc: Arunachalam Santhanam <[email protected]> Cc: Vincent Mailhol <[email protected]> Cc: Mikulas Patocka <[email protected]> Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Cc: [email protected] Acked-by: Marc Kleine-Budde <[email protected]> # drivers/net/can/usb/etas_es58x/* Signed-off-by: Kees Cook <[email protected]>
Diffstat (limited to 'include/linux/compiler-gcc.h')
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