arch/arm64/kernel/machine_kexec_file.c:152 load_other_segments() warn: missing error code 'ret'

From: Dan Carpenter
Date: Sat Jul 03 2021 - 09:01:57 EST

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head: d6b63b5b7d7f363c6a54421533791e9849adf2e0
commit: ac10be5cdbfa852139658d52c2f1c608782ce992 arm64: Use common of_kexec_alloc_and_setup_fdt()
config: arm64-randconfig-m031-20210702 (attached as .config)
compiler: aarch64-linux-gcc (GCC) 9.3.0

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>
Reported-by: Dan Carpenter <dan.carpenter@xxxxxxxxxx>

smatch warnings:
arch/arm64/kernel/machine_kexec_file.c:152 load_other_segments() warn: missing error code 'ret'

vim +/ret +152 arch/arm64/kernel/machine_kexec_file.c

52b2a8af743604 AKASHI Takahiro 2018-11-15 81 int load_other_segments(struct kimage *image,
52b2a8af743604 AKASHI Takahiro 2018-11-15 82 unsigned long kernel_load_addr,
52b2a8af743604 AKASHI Takahiro 2018-11-15 83 unsigned long kernel_size,
52b2a8af743604 AKASHI Takahiro 2018-11-15 84 char *initrd, unsigned long initrd_len,
52b2a8af743604 AKASHI Takahiro 2018-11-15 85 char *cmdline)
52b2a8af743604 AKASHI Takahiro 2018-11-15 86 {
52b2a8af743604 AKASHI Takahiro 2018-11-15 87 struct kexec_buf kbuf;
3751e728cef290 AKASHI Takahiro 2019-12-16 88 void *headers, *dtb = NULL;
108aa503657ee2 Benjamin Gwin 2020-11-03 89 unsigned long headers_sz, initrd_load_addr = 0, dtb_len,
108aa503657ee2 Benjamin Gwin 2020-11-03 90 orig_segments = image->nr_segments;
52b2a8af743604 AKASHI Takahiro 2018-11-15 91 int ret = 0;
52b2a8af743604 AKASHI Takahiro 2018-11-15 92
52b2a8af743604 AKASHI Takahiro 2018-11-15 93 kbuf.image = image;
52b2a8af743604 AKASHI Takahiro 2018-11-15 94 /* not allocate anything below the kernel */
52b2a8af743604 AKASHI Takahiro 2018-11-15 95 kbuf.buf_min = kernel_load_addr + kernel_size;
52b2a8af743604 AKASHI Takahiro 2018-11-15 96
3751e728cef290 AKASHI Takahiro 2019-12-16 97 /* load elf core header */
3751e728cef290 AKASHI Takahiro 2019-12-16 98 if (image->type == KEXEC_TYPE_CRASH) {
3751e728cef290 AKASHI Takahiro 2019-12-16 99 ret = prepare_elf_headers(&headers, &headers_sz);
3751e728cef290 AKASHI Takahiro 2019-12-16 100 if (ret) {
3751e728cef290 AKASHI Takahiro 2019-12-16 101 pr_err("Preparing elf core header failed\n");
3751e728cef290 AKASHI Takahiro 2019-12-16 102 goto out_err;
3751e728cef290 AKASHI Takahiro 2019-12-16 103 }
3751e728cef290 AKASHI Takahiro 2019-12-16 104
3751e728cef290 AKASHI Takahiro 2019-12-16 105 kbuf.buffer = headers;
3751e728cef290 AKASHI Takahiro 2019-12-16 106 kbuf.bufsz = headers_sz;
3751e728cef290 AKASHI Takahiro 2019-12-16 107 kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
3751e728cef290 AKASHI Takahiro 2019-12-16 108 kbuf.memsz = headers_sz;
3751e728cef290 AKASHI Takahiro 2019-12-16 109 kbuf.buf_align = SZ_64K; /* largest supported page size */
3751e728cef290 AKASHI Takahiro 2019-12-16 110 kbuf.buf_max = ULONG_MAX;
3751e728cef290 AKASHI Takahiro 2019-12-16 111 kbuf.top_down = true;
3751e728cef290 AKASHI Takahiro 2019-12-16 112
3751e728cef290 AKASHI Takahiro 2019-12-16 113 ret = kexec_add_buffer(&kbuf);
3751e728cef290 AKASHI Takahiro 2019-12-16 114 if (ret) {
3751e728cef290 AKASHI Takahiro 2019-12-16 115 vfree(headers);
3751e728cef290 AKASHI Takahiro 2019-12-16 116 goto out_err;
3751e728cef290 AKASHI Takahiro 2019-12-16 117 }
7b558cc3564e6c Lakshmi Ramasubramanian 2021-02-21 118 image->elf_headers = headers;
7b558cc3564e6c Lakshmi Ramasubramanian 2021-02-21 119 image->elf_load_addr = kbuf.mem;
7b558cc3564e6c Lakshmi Ramasubramanian 2021-02-21 120 image->elf_headers_sz = headers_sz;
3751e728cef290 AKASHI Takahiro 2019-12-16 121
3751e728cef290 AKASHI Takahiro 2019-12-16 122 pr_debug("Loaded elf core header at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
7b558cc3564e6c Lakshmi Ramasubramanian 2021-02-21 123 image->elf_load_addr, kbuf.bufsz, kbuf.memsz);
3751e728cef290 AKASHI Takahiro 2019-12-16 124 }
3751e728cef290 AKASHI Takahiro 2019-12-16 125
52b2a8af743604 AKASHI Takahiro 2018-11-15 126 /* load initrd */
52b2a8af743604 AKASHI Takahiro 2018-11-15 127 if (initrd) {
52b2a8af743604 AKASHI Takahiro 2018-11-15 128 kbuf.buffer = initrd;
52b2a8af743604 AKASHI Takahiro 2018-11-15 129 kbuf.bufsz = initrd_len;
c19d050f808812 Bhupesh Sharma 2019-07-11 130 kbuf.mem = KEXEC_BUF_MEM_UNKNOWN;
52b2a8af743604 AKASHI Takahiro 2018-11-15 131 kbuf.memsz = initrd_len;
52b2a8af743604 AKASHI Takahiro 2018-11-15 132 kbuf.buf_align = 0;
52b2a8af743604 AKASHI Takahiro 2018-11-15 133 /* within 1GB-aligned window of up to 32GB in size */
52b2a8af743604 AKASHI Takahiro 2018-11-15 134 kbuf.buf_max = round_down(kernel_load_addr, SZ_1G)
52b2a8af743604 AKASHI Takahiro 2018-11-15 135 + (unsigned long)SZ_1G * 32;
52b2a8af743604 AKASHI Takahiro 2018-11-15 136 kbuf.top_down = false;
52b2a8af743604 AKASHI Takahiro 2018-11-15 137
52b2a8af743604 AKASHI Takahiro 2018-11-15 138 ret = kexec_add_buffer(&kbuf);
52b2a8af743604 AKASHI Takahiro 2018-11-15 139 if (ret)
52b2a8af743604 AKASHI Takahiro 2018-11-15 140 goto out_err;
52b2a8af743604 AKASHI Takahiro 2018-11-15 141 initrd_load_addr = kbuf.mem;
52b2a8af743604 AKASHI Takahiro 2018-11-15 142
52b2a8af743604 AKASHI Takahiro 2018-11-15 143 pr_debug("Loaded initrd at 0x%lx bufsz=0x%lx memsz=0x%lx\n",
51075e0cb759a7 Łukasz Stelmach 2020-04-30 144 initrd_load_addr, kbuf.bufsz, kbuf.memsz);
52b2a8af743604 AKASHI Takahiro 2018-11-15 145 }
52b2a8af743604 AKASHI Takahiro 2018-11-15 146
52b2a8af743604 AKASHI Takahiro 2018-11-15 147 /* load dtb */
ac10be5cdbfa85 Rob Herring 2021-02-21 148 dtb = of_kexec_alloc_and_setup_fdt(image, initrd_load_addr,
ac10be5cdbfa85 Rob Herring 2021-02-21 149 initrd_len, cmdline, 0);
ac10be5cdbfa85 Rob Herring 2021-02-21 150 if (!dtb) {
52b2a8af743604 AKASHI Takahiro 2018-11-15 151 pr_err("Preparing for new dtb failed\n");
52b2a8af743604 AKASHI Takahiro 2018-11-15 @152 goto out_err;
^^^^^^^^^^^^^
Set the error code here? (The kbuild bot chopped of the rest of the
function. :P)




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