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733 Commits

Author SHA1 Message Date
John Reiser
e85e8bec5d New option --catch-sigsegv on amd64, arm64, arm.v4a 
Catch SIGSEGV during de-compression, and print state info
("auto debug") using /proc/self/maps and gdb.
This was motivated by suspicion of unreliable hardware
which triggered "Heisenbugs": a crash which cannot be reproduced.
If SIGSGV occurs without the "auto debug" info, then that
implies an error user code after de-compression, often when
user code accesses /proc/self/exe, which is not the un-compressed file.
	modified:   misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   src/help.cpp
	modified:   src/main.cpp
	modified:   src/options.h
	modified:   src/p_lx_elf.cpp
	modified:   src/stub/Makefile
	modified:   src/stub/src/amd64-linux.elf-entry.S
	modified:   src/stub/src/amd64-linux.elf-fold.S
	modified:   src/stub/src/arm.v4a-linux.elf-entry.S
	modified:   src/stub/src/arm.v4a-linux.elf-fold.S
	modified:   src/stub/src/arm64-linux.elf-entry.S
	modified:   src/stub/src/arm64-linux.elf-fold.S
           plus generated .h .dump .map
 2025-08-19 12:25:33 -07:00
John Reiser
bbb886ae4d gcc 14.2.1-3 lax on signed-vs-unsigned compare 
modified:   p_lx_elf.cpp
 2025-07-25 07:14:33 -07:00
John Reiser
b52d3e0772 Detect DT_HASH chain out-of-bounds 
https://issues.oss-fuzz.com/u/1/issues/430110068
	modified:   p_lx_elf.cpp
 2025-07-24 11:09:58 -07:00
John Reiser
b728b0e021 buildLinuxLoader needs more space 
for shlib + lzma + Android
https://github.com/upx/upx/issues/913
	modified:   p_lx_elf.cpp
 2025-05-07 13:52:58 -07:00
John Reiser
a1ef410509 ELF DT_DYNSYM: fix checking of symbol table 
Particularly JNI_OnLoad
https://github.com/upx/upx/issues/914
	modified:   p_lx_elf.cpp
 2025-05-07 17:02:56 -07:00
John Reiser
a25c20ee0b M_LZMA with hi parameter bytes confused --ultra-brute 
https://github.com/upx/upx/issues/900
	modified:   packhead.cpp
	modified:   p_lx_elf.cpp
 2025-03-20 09:48:00 -07:00
John Reiser
ff75a462a4 Fighting over .e_shentsize 
modified:   ../misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   p_lx_elf.cpp
 2025-03-18 13:48:19 -07:00
John Reiser
e0b6ff1924 More checking in unpack() 
https://github.com/upx/upx/issues/898
	modified:   p_lx_elf.cpp
 2025-03-18 08:40:08 -07:00
John Reiser
dbde75028c Avoid corrupted P_hdr 
https://issues.oss-fuzz.com/u/1/issues/398127991
	modified:   p_lx_elf.cpp
 2025-03-02 11:12:08 -08:00
John Reiser
64891286ba Unpack: better checking of bounds for DT_HASH 
https://issues.oss-fuzz.com/u/1/issues/398075916
	modified:   p_lx_elf.cpp
 2025-02-22 07:55:14 -08:00
John Reiser
e52a3ceb48 Unpack: Entire ElfXX_Ehdr must be present in de-compressed Ehdr+Phdrs 
https://issues.oss-fuzz.com/u/1/issues/397728078
(previous commit: https://issues.oss-fuzz.com/u/1/issues/397500915)
	modified:   p_lx_elf.cpp
 2025-02-22 07:55:14 -08:00
John Reiser
8cce9cf641 Detect bad b_info.method 
https://issues.oss-fuzz.com/u/1/issues?q=upx
	modified:   p_lx_elf.cpp
	modified:   p_unix.cpp
	modified:   packhead.cpp
	modified:   packhead.h
 2025-02-22 07:55:14 -08:00
John Reiser
83e5f74b3d Compiler different type checking 
modified:   p_lx_elf.cpp
 2025-02-17 09:39:55 -08:00
John Reiser
3d402134f5 Better checking of DT_GNU_HASH during de-compression 
https://issues.oss-fuzz.com/u/1/issues/396167884
	modified:   p_lx_elf.cpp
 2025-02-17 09:14:19 -08:00
John Reiser
b8b64a3e0f Fuzz nuisance: wild p_info for de-compression 
https://issues.oss-fuzz.com/u/1/issues/383200048
	modified:   p_lx_elf.cpp
 2025-02-17 08:26:17 -08:00
John Reiser
78f4959521 Fix de-compression of ELF shared libraries 
Reset ph.method on each b_info.b_method.
Use file_image[] as ReadOnly, subsuming fi->seek()+read().
Use lowmem[0, +xct_off) for changing values.
Work on un_DT_INIT().
https://github.com/upx/upx/issues/882

	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   p_unix.cpp
 2025-02-15 19:35:21 -08:00
John Reiser
eff1ef2d70 Fix amd64 shared libraries 
Inspired by https://github.com/upx/upx/issues/880
(https://github.com/microsoft/mimalloc.git on Linux)
but still need test case.
	modified:   p_lx_elf.cpp
	modified:   stub/amd64-linux.elf-so_entry.h
	modified:   stub/src/amd64-linux.elf-so_entry.S
 2025-02-13 17:22:37 -08:00
John Reiser
782b07c752 PPC64 check ehdri.e_ident[EI_DATA], not elfout 
modified:   p_lx_elf.cpp
 2025-02-12 08:56:18 -08:00
John Reiser
8c9e04daaf Propagate .e_ident[EI_ABIVERSION] 
Linux on bare metal (and explicit qemu) seems not to care,
but qemu-user-binfmt gives ENOEXEC (Exec format error)
        https://github.com/upx/upx/issues/876
 2025-02-07 19:24:46 -08:00
John Reiser
bddc05e787 Fix elf_lookup() defenses against fuzzed DT_HASH 
modified:   p_lx_elf.cpp
 2025-02-01 13:22:26 -08:00
John Reiser
7b06ba0b78 Detect empty DT_STRTAB 
https://github.com/upx/upx/issues/872
fuzzing from leon.weiss AT @ruhr-uni-bochum.de
	modified:   p_lx_elf.cpp
 2025-01-31 11:32:48 -08:00
John Reiser
344b73dab0 invert_pt_dynamic defends against missing DT_STRTAB or DT_STRSIZ 
https://github.com/upx/upx/issues/872
fuzzing from leon.weiss AT @ruhr-uni-bochum.de
	modified:   p_lx_elf.cpp
 2025-01-30 11:42:09 -08:00
John Reiser
0870514194 elf_lookup must defend against bad chain in hash table 
https://github.com/upx/upx/issues/871
fuzzing from leon.weiss AT @ruhr-uni-bochum.de
 2025-01-30 10:56:45 -08:00
Markus F.X.J. Oberhumer
3fd68d3ec6 CI updates 2025-01-27 18:11:44 +01:00
Markus F.X.J. Oberhumer
996ca8d17d all: welcome 2025 2025-01-17 21:18:55 +01:00
John Reiser
e3e5d8a3a5 Try again for Android Elfxx_Shdr 
modified:   ../misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   p_unix.cpp
 2024-12-23 11:20:26 -08:00
John Reiser
7d907d9d65 is_asl handles per-file opt->o_unix.android_shlib 
Also slide_sh_offset() handles so_slide.
TODO: if asl_delta, then relocate sh_offset that is above xct_off.
PT_DYNAMIC.p_offset and {.dynamic}.sh_offset must match; etc.

	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   p_unix.cpp
 2024-12-17 17:17:24 -08:00
John Reiser
330ac2443c help_umf.S for MIPS and PPC 
modified:   p_lx_elf.cpp
	modified:   stub/Makefile
	modified:   stub/src/mips.r3000-linux.elf-help_umf.S
	modified:   stub/src/mipsel.r3000-linux.elf-entry.S
	modified:   stub/src/mipsel.r3000-linux.elf-help_umf.S
	new file:   stub/src/powerpc-linux.elf-help_umf.S
 2024-12-05 11:06:09 -08:00
John Reiser
982e732b74 Allow re-ordering of functions in upxfd_android.c and upxfd_linux.c 
Compiler has a mind of its own.
	modified:   p_lx_elf.cpp
	modified:   stub/Makefile
	new file:   stub/src/amd64-linux.elf-help_umf.S
	modified:   stub/src/arm.v4a-expand.S
	new file:   stub/src/arm.v4a-linux.elf-help_umf.S
	modified:   stub/src/arm.v4a-linux.elf-so_entry.S
	modified:   stub/src/arm.v4a-linux.elf-so_fold.S
	new file:   stub/src/arm.v5a-linux.elf-help_umf.S
	new file:   stub/src/arm64-linux.elf-help_umf.S
	modified:   stub/src/arm64-linux.elf-so_entry.S
	new file:   stub/src/armeb.v4a-linux.elf-help_umf.S
	new file:   stub/src/i386-linux.elf-help_umf.S
	modified:   stub/src/i386-linux.elf-so_main.c
	new file:   stub/src/mips.r3000-linux.elf-help_umf.S
	new file:   stub/src/mipsel.r3000-linux.elf-help_umf.S
	modified:   stub/src/upxfd_android.c
 2024-12-04 17:00:37 -08:00
John Reiser
37dff58289 powerpc-linux.elf-entry.S does not need UMF_LINUX 
... because it calls memfd_create directly, not via upx_mmap_and_fd.
Perhaps MIPS, foo?
	modified:   p_lx_elf.cpp
 2024-12-03 11:50:21 -08:00
John Reiser
68b31d31c3 msync() and UMF_LINUX fiddling 
modified:   p_lx_elf.cpp
	modified:   stub/src/amd64-linux.elf-entry.S
	modified:   stub/src/amd64-linux.elf-so_fold.S
	modified:   stub/src/arm.v4a-linux.elf-entry.S
	modified:   stub/src/arm.v4a-linux.elf-entry.lds
	modified:   stub/src/arm.v4a-linux.elf-fold.S
	modified:   stub/src/arm.v4a-linux.elf-so_entry.S
	modified:   stub/src/arm64-linux.elf-so_fold.S
	modified:   stub/src/mips.r3000-linux.elf-entry.lds
	modified:   stub/src/mipsel.r3000-linux.elf-entry.S
	modified:   stub/src/mipsel.r3000-linux.elf-entry.lds
	modified:   stub/src/mipsel.r3000-linux.elf-fold.S
	modified:   stub/src/upxfd_linux.c
 2024-12-03 10:36:14 -08:00
John Reiser
d04209d30f Unify 32-bit and 64-bit ::buildLinuxLoader 
modified:   p_lx_elf.cpp
 2024-11-28 19:09:46 -08:00
John Reiser
8782778eb3 stub *-linux.elf-entry.S often must define label upx_mmap_and_fd 
modified:   p_lx_elf.cpp
	modified:   stub/src/arm.v4a-linux.elf-entry.S
	modified:   stub/src/arm.v4a-linux.elf-so_entry.S
	modified:   stub/src/i386-linux.elf-entry.S
 2024-11-26 19:43:14 -08:00
John Reiser
c8515ae862 Unify PackLinuxElf64::pack2_shlib* with 32-bit 
modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
 2024-11-26 16:44:35 -08:00
John Reiser
76b0b4ce9c Fix mips stub for ELF2 main program 
modified:   p_lx_elf.cpp
	modified:   stub/Makefile
	modified:   stub/src/mips.r3000-expand.S
	modified:   stub/src/upxfd_linux.c
 2024-11-20 15:02:32 -08:00
John Reiser
83166e21a5 PackLinuxElf64::unpack forgot some get_te* 
Also use is_LOAD where ever possible.
	modified:   p_lx_elf.cpp

	modified:   ../NEWS
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
 2024-11-20 07:46:24 -08:00
John Reiser
b4ea89f9d6 check-whitespace, clang-format 
modified:   p_elf_enum.h
	modified:   p_lx_elf.cpp
	modified:   stub/src/i386-linux.elf-so_entry.S
 2024-11-19 09:13:44 -08:00
John Reiser
7ef018fed0 Option --android-oid for Android < 10 
modified:   main.cpp
	modified:   options.h
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   p_unix.h
 2024-11-18 16:06:45 -08:00
John Reiser
886e325cbf EXP_TAIL goes after de-compressors, and before UMF_LINUX 
modified:   p_lx_elf.cpp
	modified:   stub/src/i386-expand.S
 2024-11-14 19:22:28 -08:00
John Reiser
a9dc43f7fb PackLinuxElf32::generateElfHdr, PackLinuxElf64::buildLinuxLoader 
modified:   p_elf_enum.h
	modified:   p_lx_elf.cpp
 2024-10-26 10:53:28 -07:00
John Reiser
0cc0e51d5d PackLinuxElf64::canPack_Shdr 
modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
 2024-10-26 10:02:14 -07:00
John Reiser
3403b87cb7 More Control Flow Integrity (Intel) 
More ENDBRxx for CALL *%RDX for 'getbit'.
amd64: LEA xxx(%rip),%reg and STRCON section,
    instead of CALL; .asciz "..."; POP %reg
(Not for PE due to WINDOWS_BACK binary compatibility.)
i386 string constants still use call-.asciz-pop because no (%rip)
	modified:   ../misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   p_lx_elf.cpp
	modified:   stub/src/amd64-linux.elf-entry.S
	modified:   stub/src/amd64-linux.elf-main2.c
	modified:   stub/src/amd64-linux.elf-so_entry.S
	modified:   stub/src/amd64-linux.shlib-init.S
	modified:   stub/src/amd64-win64.pe.S
	modified:   stub/src/i386-linux.elf-entry.S
	modified:   stub/src/i386-linux.elf-so_entry.S
	modified:   stub/src/upxfd_android.c
           plus generated *.h *.map *.dump
 2024-09-20 14:48:30 -07:00
John Reiser
d55fdf2205 ZIG_DIST_VERSION of 2024-09-17 
also https://github.com/upx/upx/issues/847

	modified:   ../.github/workflows/ci.yml
	modified:   ../misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   p_lx_elf.cpp
	modified:   stub/src/amd64-linux.elf-entry.S
	modified:   stub/src/amd64-linux.elf-main2.c
	modified:   stub/src/i386-darwin.macho-entry.S
           plus generated *.h *.map *.dump
 2024-09-17 01:55:08 -07:00
John Reiser
7cb3f40dab WIP: variable page size for xfind_pages(); debug arm32 Android shlib 
modified:   p_lx_elf.cpp
	modified:   stub/src/amd64-linux.elf-entry.S
	modified:   stub/src/amd64-linux.elf-fold.S
	modified:   stub/src/amd64-linux.elf-main2.c
	modified:   stub/src/arm.v4a-linux.elf-so_entry.S
	modified:   stub/src/i386-linux.elf-main2.c
           plus generated *.h *.dump *.map
 2024-08-29 16:55:18 -07:00
John Reiser
65c362efce MSVC lacks stpcpy() 
modified:   p_lx_elf.cpp
 2024-08-26 18:59:55 -07:00
John Reiser
8065eebca3 --android-shlib for arm32 and i386 
... including work-around if no memfd_create() on early Android 32-bit
	modified:   ../misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   p_elf_enum.h
	modified:   p_lx_elf.cpp
	modified:   stub/src/arm.v4a-linux.elf-so_entry.S
	modified:   stub/src/arm.v4a-linux.elf-so_fold.S
	modified:   stub/src/i386-linux.elf-so_main.c
	modified:   stub/src/upxfd_android.c
           plus generated *.h *.dump *.map
 2024-08-25 15:16:29 -07:00
John Reiser
94eebc3ee5 ELF2: arm32 shared libraries; runs on Android 14 under TermUX 
NYI: complex DT_INIT (R_RELR, etc.)
	modified:   p_lx_elf.cpp
	modified:   p_lx_elf.h
	modified:   stub/src/arm.v4a-expand.S
	modified:   stub/src/arm.v4a-linux.elf-entry.S
	modified:   stub/src/arm.v4a-linux.elf-so_entry.S
	modified:   stub/src/arm.v4a-linux.elf-so_fold.S
	modified:   stub/src/i386-linux.elf-main2.c
	modified:   stub/src/i386-linux.elf-so_main.c
	modified:   stub/src/upxfd_android.c
           plus generated *.h *.map *.dump
 2024-08-25 15:16:29 -07:00
John Reiser
bff5049a98 developer documentation 
modified:   p_lx_elf.cpp
 2024-08-25 15:16:29 -07:00
John Reiser
3d58035b41 i386 stub filters 0x49 and 0x46 really are different (but similar!) 
modified:   filter/filter_impl.cpp
	modified:   p_lx_elf.cpp
	modified:   stub/src/arch/i386/bxx.S
 2024-08-25 15:16:29 -07:00
John Reiser
ea2a190bd1 ELF2 main programs pass src/testsuite and upx-testsuite-v2 
Decompressing lzma required many adjustments.
Backwards compatibility probably is broken for
    stub/amd64-win64.pe.h
    stub/arm64-win64.pe.h
Also: shared libraries need memfd_create.
	modified:   ../misc/testsuite/upx_testsuite_1-expected_sha256sums.sh
	modified:   p_lx_elf.cpp
	modified:   stub/Makefile
	modified:   stub/scripts/xstrip.py
	modified:   stub/src/amd64-expand.S
	modified:   stub/src/arch/amd64/lzma_d.S
	modified:   stub/src/arch/arm/v4a/lzma_d.S
	modified:   stub/src/arch/arm/v4t/macros.S
	modified:   stub/src/arch/arm64/v8/lzma_d.S
	modified:   stub/src/arch/powerpc/32/lzma_d.S
	modified:   stub/src/arch/powerpc/64le/lzma_d-common.S
	modified:   stub/src/arm.v4a-expand.S
	modified:   stub/src/arm.v4t-linux.shlib-init.S
	modified:   stub/src/arm64-expand.S
	modified:   stub/src/i386-expand.S
	modified:   stub/src/mips.r3000-expand.S
	modified:   stub/src/powerpc-expand.S
	modified:   stub/src/powerpc-linux.elf-entry.S
	modified:   stub/src/powerpc-linux.elf-fold.S
	modified:   stub/src/powerpc64-expand.S
	modified:   stub/src/powerpc64-linux.elf-entry.S
	modified:   stub/src/powerpc64-linux.elf-fold.S
           plus generated *.h *.map *.dump
 2024-08-25 15:16:29 -07:00