Bug#1121448: /usr/lib/linux-kbuild-6.18/tools/objtool/objtool: objtool crashes with coredump
Package: linux-kbuild-6.18
Version: 6.18~rc7-1~exp1
Severity: normal
File: /usr/lib/linux-kbuild-6.18/tools/objtool/objtool
Dear Maintainer,
I'm trying to install the package *nvidia-kernel-dkms* (550.163.01-4) on my
system which triggers dkms. This fails, because objtool crashes. Here is the
core dump:
PID: 219805 (objtool.real-x8)
UID: 1000 (joerg)
GID: 1000 (joerg)
Signal: 11 (SEGV)
Timestamp: Wed 2025-11-26 14:11:01 CET (3min 37s ago)
Command Line: /usr/src/linux-headers-6.18-amd64/tools/objtool/objtool --hacks=jump_label --hacks=noinstr --hacks=skylake --ibt --orc --retpoline --rethunk --sls --static-call --uaccess --prefix=16 --link --module nvidia.o
Executable: /usr/lib/linux-kbuild-6.18/tools/objtool/objtool.real-x86
Control Group: /user.slice/user-1000.slice/user@1000.service/app.slice/app-gnome-xterm-31934.scope
Unit: user@1000.service
User Unit: app-gnome-xterm-31934.scope
Slice: user-1000.slice
Owner UID: 1000 (joerg)
Boot ID: 31de29b563df4019b7e2ab8c62b9f795
Machine ID: 523cb54753234ed08c13ec497d0d3b64
Hostname: zenbook
Storage: /var/lib/systemd/coredump/core.objtool\x2ereal-x8.1000.31de29b563df4019b7e2ab8c62b9f795.219805.1764162661000000.zst (present)
Size on Disk: 110M
Message: Process 219805 (objtool.real-x8) of user 1000 dumped core.
[New LWP 219805]
[Thread debugging using libthread_db enabled]
Using host libthread_db library "/lib/x86_64-linux-gnu/libthread_db.so.1".
Core was generated by `/usr/src/linux-headers-6.18-amd64/tools/objtool/objtool --hacks=jump_label --ha'.
Program terminated with signal SIGSEGV, Segmentation fault.
Download failed: Invalid argument. Continuing without source file ./tools/objtool/./tools/objtool/elf.c.
#0 find_reloc_by_dest_range (elf=0x5b04b9247c70, sec=sec@entry=0x5b04b924b820, offset=24, len=<optimized out>) at ./tools/objtool/elf.c:285
warning: 285 ./tools/objtool/elf.c: No such file or directory
Thread 1 (Thread 0x7941780f8f00 (LWP 219805)):
#0 find_reloc_by_dest_range (elf=0x5b04b9247c70, sec=sec@entry=0x5b04b924b820, offset=24, len=<optimized out>) at ./tools/objtool/elf.c:285
reloc = 0xaaaaaaaaaaaaaaaa
r = 0x7941727b3010
rsec = 0x5b04b924b8e0
o = 16
#1 0x00005b04b2253187 in insn_reloc (file=<optimized out>, insn=0x5b04b92bac40) at ./tools/objtool/check.c:1268
reloc = <optimized out>
#2 add_jump_destinations (file=<optimized out>) at ./tools/objtool/check.c:1503
func = 0x79417366fcd0
__sec = 0x5b04b924b820
__fake = <optimized out>
insn = 0x5b04b92bac40
jump_dest = <optimized out>
reloc = <optimized out>
dest_sec = <optimized out>
dest_off = <optimized out>
ret = <optimized out>
#3 decode_sections (file=file@entry=0x5b04b2279e80 <file>) at ./tools/objtool/check.c:2573
ret = <optimized out>
#4 0x00005b04b2254c70 in check (file=file@entry=0x5b04b2279e80 <file>) at ./tools/objtool/check.c:4773
ret = 0
warnings = 0
#5 0x00005b04b225891a in objtool_run (argc=<optimized out>, argv=0x7fff8147cc08) at ./tools/objtool/builtin-check.c:328
file = 0x5b04b2279e80 <file>
ret = 0
#6 0x000079417820dca8 in __libc_start_call_main (main=main@entry=0x5b04b22456f0 <main>, argc=argc@entry=15, argv=argv@entry=0x7fff8147cc08) at ../sysdeps/nptl/libc_start_call_main.h:58
self = <optimized out>
result = <optimized out>
unwind_buf = {cancel_jmp_buf = {{jmp_buf = {140735362354184, 2401228595235890281, 0, 140735362354312, 133322097692672, 100075726927544, -2401014395131550615, -3184026318482856855}, mask_was_saved = 0}}, priv = {pad = {0x0, 0x0, 0x7fff8147cc08, 0xf}, data = {prev = 0x0, cleanup = 0x0, canceltype = -2126001144}}}
not_first_call = <optimized out>
#7 0x000079417820dd65 in __libc_start_main_impl (main=0x5b04b22456f0 <main>, argc=15, argv=0x7fff8147cc08, init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized out>, stack_end=0x7fff8147cbf8) at ../csu/libc-start.c:360
No locals.
#8 0x00005b04b2245761 in _start ()
No symbol table info available.
--- END ---
Best regards
Jörg
-- System Information:
Debian Release: forky/sid
APT prefers unstable-debug
APT policy: (500, 'unstable-debug'), (500, 'unstable'), (1, 'experimental-debug'), (1, 'experimental')
Architecture: amd64 (x86_64)
Foreign Architectures: i386
Kernel: Linux 6.18-amd64 (SMP w/8 CPU threads; PREEMPT)
Kernel taint flags: TAINT_UNSIGNED_MODULE
Locale: LANG=de_DE.UTF-8, LC_CTYPE=de_DE.UTF-8 (charmap=UTF-8), LANGUAGE not set
Shell: /bin/sh linked to /usr/bin/dash
Init: systemd (via /run/systemd/system)
LSM: AppArmor: enabled
Versions of packages linux-kbuild-6.18 depends on:
ii libc6 2.41-12
ii libelf1t64 0.194-1
ii libssl3t64 3.5.4-1
ii pahole 1.31-1
ii python3 3.13.7-1
ii zlib1g 1:1.3.dfsg+really1.3.1-1+b1
linux-kbuild-6.18 recommends no packages.
linux-kbuild-6.18 suggests no packages.
-- no debconf information
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