]> git.proxmox.com Git - mirror_ubuntu-kernels.git/commit
efi/cper: Use scnprintf() for avoiding potential buffer overflow
authorTakashi Iwai <tiwai@suse.de>
Thu, 9 Apr 2020 13:04:26 +0000 (15:04 +0200)
committerIngo Molnar <mingo@kernel.org>
Tue, 14 Apr 2020 06:32:11 +0000 (08:32 +0200)
commitb450b30b97010e5c68ab522c6f6c54ef76bd0683
treef8d6491f8bf1f1e867d50537b6606064419e2f33
parent8f3d9f354286745c751374f5f1fcafee6b3f3136
efi/cper: Use scnprintf() for avoiding potential buffer overflow

Since snprintf() returns the would-be-output size instead of the
actual output size, the succeeding calls may go beyond the given
buffer limit.  Fix it by replacing with scnprintf().

Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20200311072145.5001-1-tiwai@suse.de
Link: https://lore.kernel.org/r/20200409130434.6736-2-ardb@kernel.org
drivers/firmware/efi/cper.c