Context |
Check |
Description |
bpf/vmtest-bpf-next-PR |
success
|
PR summary
|
bpf/vmtest-bpf-next-VM_Test-1 |
success
|
Logs for ShellCheck
|
bpf/vmtest-bpf-next-VM_Test-2 |
success
|
Logs for Unittests
|
bpf/vmtest-bpf-next-VM_Test-5 |
success
|
Logs for aarch64-gcc / build-release
|
bpf/vmtest-bpf-next-VM_Test-0 |
success
|
Logs for Lint
|
bpf/vmtest-bpf-next-VM_Test-3 |
success
|
Logs for Validate matrix.py
|
bpf/vmtest-bpf-next-VM_Test-9 |
success
|
Logs for aarch64-gcc / test (test_verifier, false, 360) / test_verifier on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-4 |
success
|
Logs for aarch64-gcc / build / build for aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-10 |
success
|
Logs for aarch64-gcc / veristat
|
bpf/vmtest-bpf-next-VM_Test-11 |
success
|
Logs for s390x-gcc / build / build for s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-12 |
success
|
Logs for s390x-gcc / build-release
|
bpf/vmtest-bpf-next-VM_Test-16 |
success
|
Logs for s390x-gcc / test (test_verifier, false, 360) / test_verifier on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-17 |
success
|
Logs for s390x-gcc / veristat
|
bpf/vmtest-bpf-next-VM_Test-18 |
success
|
Logs for set-matrix
|
bpf/vmtest-bpf-next-VM_Test-19 |
success
|
Logs for x86_64-gcc / build / build for x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-20 |
success
|
Logs for x86_64-gcc / build-release
|
bpf/vmtest-bpf-next-VM_Test-21 |
success
|
Logs for x86_64-gcc / test (test_maps, false, 360) / test_maps on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-26 |
success
|
Logs for x86_64-gcc / test (test_verifier, false, 360) / test_verifier on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-28 |
success
|
Logs for x86_64-llvm-17 / build / build for x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-29 |
success
|
Logs for x86_64-llvm-17 / build-release / build for x86_64 with llvm-17-O2
|
bpf/vmtest-bpf-next-VM_Test-30 |
success
|
Logs for x86_64-llvm-17 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-33 |
success
|
Logs for x86_64-llvm-17 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-34 |
success
|
Logs for x86_64-llvm-17 / veristat
|
bpf/vmtest-bpf-next-VM_Test-35 |
success
|
Logs for x86_64-llvm-18 / build / build for x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-36 |
success
|
Logs for x86_64-llvm-18 / build-release / build for x86_64 with llvm-18-O2
|
bpf/vmtest-bpf-next-VM_Test-37 |
success
|
Logs for x86_64-llvm-18 / test (test_maps, false, 360) / test_maps on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-41 |
success
|
Logs for x86_64-llvm-18 / test (test_verifier, false, 360) / test_verifier on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-42 |
success
|
Logs for x86_64-llvm-18 / veristat
|
bpf/vmtest-bpf-next-VM_Test-7 |
success
|
Logs for aarch64-gcc / test (test_progs, false, 360) / test_progs on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-8 |
success
|
Logs for aarch64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-6 |
success
|
Logs for aarch64-gcc / test (test_maps, false, 360) / test_maps on aarch64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-13 |
success
|
Logs for s390x-gcc / test (test_maps, false, 360) / test_maps on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-14 |
success
|
Logs for s390x-gcc / test (test_progs, false, 360) / test_progs on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-15 |
success
|
Logs for s390x-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on s390x with gcc
|
bpf/vmtest-bpf-next-VM_Test-22 |
success
|
Logs for x86_64-gcc / test (test_progs, false, 360) / test_progs on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-23 |
success
|
Logs for x86_64-gcc / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-24 |
success
|
Logs for x86_64-gcc / test (test_progs_no_alu32_parallel, true, 30) / test_progs_no_alu32_parallel on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-25 |
success
|
Logs for x86_64-gcc / test (test_progs_parallel, true, 30) / test_progs_parallel on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-27 |
success
|
Logs for x86_64-gcc / veristat / veristat on x86_64 with gcc
|
bpf/vmtest-bpf-next-VM_Test-31 |
success
|
Logs for x86_64-llvm-17 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-32 |
success
|
Logs for x86_64-llvm-17 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-17
|
bpf/vmtest-bpf-next-VM_Test-38 |
success
|
Logs for x86_64-llvm-18 / test (test_progs, false, 360) / test_progs on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-39 |
success
|
Logs for x86_64-llvm-18 / test (test_progs_cpuv4, false, 360) / test_progs_cpuv4 on x86_64 with llvm-18
|
bpf/vmtest-bpf-next-VM_Test-40 |
success
|
Logs for x86_64-llvm-18 / test (test_progs_no_alu32, false, 360) / test_progs_no_alu32 on x86_64 with llvm-18
|
netdev/series_format |
success
|
Posting correctly formatted
|
netdev/tree_selection |
success
|
Clearly marked for bpf-next, async
|
netdev/ynl |
success
|
Generated files up to date;
no warnings/errors;
no diff in generated;
|
netdev/fixes_present |
success
|
Fixes tag not required for -next series
|
netdev/header_inline |
success
|
No static functions without inline keyword in header files
|
netdev/build_32bit |
success
|
Errors and warnings before: 42 this patch: 42
|
netdev/build_tools |
success
|
No tools touched, skip
|
netdev/cc_maintainers |
fail
|
3 blamed authors not CCed: ast@kernel.org songliubraving@fb.com jolsa@kernel.org; 3 maintainers not CCed: ast@kernel.org songliubraving@fb.com jolsa@kernel.org
|
netdev/build_clang |
success
|
Errors and warnings before: 43 this patch: 43
|
netdev/verify_signedoff |
success
|
Signed-off-by tag matches author and committer
|
netdev/deprecated_api |
success
|
None detected
|
netdev/check_selftest |
success
|
No net selftest shell script
|
netdev/verify_fixes |
success
|
Fixes tag looks correct
|
netdev/build_allmodconfig_warn |
success
|
Errors and warnings before: 43 this patch: 43
|
netdev/checkpatch |
warning
|
WARNING: const array should probably be static const
WARNING: line length of 81 exceeds 80 columns
WARNING: line length of 83 exceeds 80 columns
WARNING: line length of 98 exceeds 80 columns
|
netdev/build_clang_rust |
success
|
No Rust files in patch. Skipping build
|
netdev/kdoc |
success
|
Errors and warnings before: 0 this patch: 0
|
netdev/source_inline |
success
|
Was 0 now: 0
|
@@ -18,30 +18,34 @@ static int parse_build_id_buf(unsigned char *build_id,
const void *note_start,
Elf32_Word note_size)
{
+ const char note_name[] = "GNU";
+ const size_t note_name_sz = sizeof(note_name);
Elf32_Word note_offs = 0, new_offs;
+ u32 name_sz, desc_sz;
+ const char *data;
- while (note_offs + sizeof(Elf32_Nhdr) < note_size) {
+ while (note_offs + sizeof(Elf32_Nhdr) < note_size &&
+ note_offs + sizeof(Elf32_Nhdr) > note_offs /* overflow */) {
Elf32_Nhdr *nhdr = (Elf32_Nhdr *)(note_start + note_offs);
+ name_sz = READ_ONCE(nhdr->n_namesz);
+ desc_sz = READ_ONCE(nhdr->n_descsz);
+ new_offs = note_offs + sizeof(Elf32_Nhdr) + ALIGN(name_sz, 4) + ALIGN(desc_sz, 4);
+ if (new_offs <= note_offs /* overflow */ || new_offs > note_size)
+ break;
+
if (nhdr->n_type == BUILD_ID &&
- nhdr->n_namesz == sizeof("GNU") &&
- !strcmp((char *)(nhdr + 1), "GNU") &&
- nhdr->n_descsz > 0 &&
- nhdr->n_descsz <= BUILD_ID_SIZE_MAX) {
- memcpy(build_id,
- note_start + note_offs +
- ALIGN(sizeof("GNU"), 4) + sizeof(Elf32_Nhdr),
- nhdr->n_descsz);
- memset(build_id + nhdr->n_descsz, 0,
- BUILD_ID_SIZE_MAX - nhdr->n_descsz);
+ name_sz == note_name_sz &&
+ strcmp((char *)(nhdr + 1), note_name) == 0 &&
+ desc_sz > 0 && desc_sz <= BUILD_ID_SIZE_MAX) {
+ data = note_start + note_offs + ALIGN(note_name_sz, 4);
+ memcpy(build_id, data, desc_sz);
+ memset(build_id + desc_sz, 0, BUILD_ID_SIZE_MAX - desc_sz);
if (size)
- *size = nhdr->n_descsz;
+ *size = desc_sz;
return 0;
}
- new_offs = note_offs + sizeof(Elf32_Nhdr) +
- ALIGN(nhdr->n_namesz, 4) + ALIGN(nhdr->n_descsz, 4);
- if (new_offs <= note_offs) /* overflow */
- break;
+
note_offs = new_offs;
}
@@ -71,7 +75,7 @@ static int get_build_id_32(const void *page_addr, unsigned char *build_id,
{
Elf32_Ehdr *ehdr = (Elf32_Ehdr *)page_addr;
Elf32_Phdr *phdr;
- int i;
+ __u32 i, phnum;
/*
* FIXME
@@ -80,9 +84,10 @@ static int get_build_id_32(const void *page_addr, unsigned char *build_id,
*/
if (ehdr->e_phoff != sizeof(Elf32_Ehdr))
return -EINVAL;
+
+ phnum = READ_ONCE(ehdr->e_phnum);
/* only supports phdr that fits in one page */
- if (ehdr->e_phnum >
- (PAGE_SIZE - sizeof(Elf32_Ehdr)) / sizeof(Elf32_Phdr))
+ if (phnum > (PAGE_SIZE - sizeof(Elf32_Ehdr)) / sizeof(Elf32_Phdr))
return -EINVAL;
phdr = (Elf32_Phdr *)(page_addr + sizeof(Elf32_Ehdr));
@@ -90,8 +95,8 @@ static int get_build_id_32(const void *page_addr, unsigned char *build_id,
for (i = 0; i < ehdr->e_phnum; ++i) {
if (phdr[i].p_type == PT_NOTE &&
!parse_build_id(page_addr, build_id, size,
- page_addr + phdr[i].p_offset,
- phdr[i].p_filesz))
+ page_addr + READ_ONCE(phdr[i].p_offset),
+ READ_ONCE(phdr[i].p_filesz)))
return 0;
}
return -EINVAL;
@@ -103,7 +108,7 @@ static int get_build_id_64(const void *page_addr, unsigned char *build_id,
{
Elf64_Ehdr *ehdr = (Elf64_Ehdr *)page_addr;
Elf64_Phdr *phdr;
- int i;
+ __u32 i, phnum;
/*
* FIXME
@@ -112,18 +117,19 @@ static int get_build_id_64(const void *page_addr, unsigned char *build_id,
*/
if (ehdr->e_phoff != sizeof(Elf64_Ehdr))
return -EINVAL;
+
+ phnum = READ_ONCE(ehdr->e_phnum);
/* only supports phdr that fits in one page */
- if (ehdr->e_phnum >
- (PAGE_SIZE - sizeof(Elf64_Ehdr)) / sizeof(Elf64_Phdr))
+ if (phnum > (PAGE_SIZE - sizeof(Elf64_Ehdr)) / sizeof(Elf64_Phdr))
return -EINVAL;
phdr = (Elf64_Phdr *)(page_addr + sizeof(Elf64_Ehdr));
- for (i = 0; i < ehdr->e_phnum; ++i) {
+ for (i = 0; i < phnum; ++i) {
if (phdr[i].p_type == PT_NOTE &&
!parse_build_id(page_addr, build_id, size,
- page_addr + phdr[i].p_offset,
- phdr[i].p_filesz))
+ page_addr + READ_ONCE(phdr[i].p_offset),
+ READ_ONCE(phdr[i].p_filesz)))
return 0;
}
return -EINVAL;
Harden build ID parsing logic, adding explicit READ_ONCE() where it's important to have a consistent value read and validated just once. Also, as pointed out by Andi Kleen, we need to make sure that entire ELF note is within a page bounds, so move the overflow check up and add an extra note_size boundaries validation. Fixes tag below points to the code that moved this code into lib/buildid.c, and then subsequently was used in perf subsystem, making this code exposed to perf_event_open() users in v5.12+. Cc: stable@vger.kernel.org Cc: Jann Horn <jannh@google.com> Suggested-by: Andi Kleen <ak@linux.intel.com> Fixes: bd7525dacd7e ("bpf: Move stack_map_get_build_id into lib") Signed-off-by: Andrii Nakryiko <andrii@kernel.org> --- lib/buildid.c | 60 ++++++++++++++++++++++++++++----------------------- 1 file changed, 33 insertions(+), 27 deletions(-)