From: Petr Vandrovec Date: Fri, 13 Oct 2006 02:13:16 +0000 (+0200) Subject: [PATCH] Get core dump code to work... X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=7f14daa19ea36b200d237ad3ac5826ae25360461;p=GitHub%2FLineageOS%2Fandroid_kernel_motorola_exynos9610.git [PATCH] Get core dump code to work... The file based core dump code was broken by pipe changes - a relative llseek returns the absolute file position on success, not the relative one, so dump_seek() always failed when invoked with non-zero current position. Only success/failure can be tested with relative lseek, we have to trust kernel that on success we've got right file offset. With this fix in place I have finally real core files instead of 1KB fragments... Signed-off-by: Petr Vandrovec [ Cleaned it up a bit while here - use SEEK_CUR instead of hardcoding 1 ] Signed-off-by: Linus Torvalds --- diff --git a/fs/binfmt_elf.c b/fs/binfmt_elf.c index 06435f3665f4..561006127902 100644 --- a/fs/binfmt_elf.c +++ b/fs/binfmt_elf.c @@ -1152,7 +1152,7 @@ static int dump_write(struct file *file, const void *addr, int nr) static int dump_seek(struct file *file, loff_t off) { if (file->f_op->llseek && file->f_op->llseek != no_llseek) { - if (file->f_op->llseek(file, off, 1) != off) + if (file->f_op->llseek(file, off, SEEK_CUR) < 0) return 0; } else { char *buf = (char *)get_zeroed_page(GFP_KERNEL);