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由 Miklos Szeredi 提交于
When truncating a file we should check write access on the underlying inode. And we should do so on the lower file as well (before copy-up) for consistency. Original patch and test case by Aihua Zhang. - - >o >o - - test.c - - >o >o - - #include <stdio.h> #include <errno.h> #include <unistd.h> int main(int argc, char *argv[]) { int ret; ret = truncate(argv[0], 4096); if (ret != -1) { fprintf(stderr, "truncate(argv[0]) should have failed\n"); return 1; } if (errno != ETXTBSY) { perror("truncate(argv[0])"); return 1; } return 0; } - - >o >o - - >o >o - - >o >o - - Reported-by: NAihua Zhang <zhangaihua1@huawei.com> Signed-off-by: NMiklos Szeredi <mszeredi@redhat.com> Cc: <stable@vger.kernel.org>
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