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Howard Chu c7b87ce0dd perf trace: Fix runtime error of index out of bounds 
libtraceevent parses and returns an array of argument fields, sometimes
larger than RAW_SYSCALL_ARGS_NUM (6) because it includes "__syscall_nr",
idx will traverse to index 6 (7th element) whereas sc->fmt->arg holds 6
elements max, creating an out-of-bounds access. This runtime error is
found by UBsan. The error message:

  $ sudo UBSAN_OPTIONS=print_stacktrace=1 ./perf trace -a --max-events=1
  builtin-trace.c:1966:35: runtime error: index 6 out of bounds for type 'syscall_arg_fmt [6]'
    #0 0x5c04956be5fe in syscall__alloc_arg_fmts /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:1966
    #1 0x5c04956c0510 in trace__read_syscall_info /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:2110
    #2 0x5c04956c372b in trace__syscall_info /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:2436
    #3 0x5c04956d2f39 in trace__init_syscalls_bpf_prog_array_maps /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:3897
    #4 0x5c04956d6d25 in trace__run /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:4335
    #5 0x5c04956e112e in cmd_trace /home/howard/hw/linux-perf/tools/perf/builtin-trace.c:5502
    #6 0x5c04956eda7d in run_builtin /home/howard/hw/linux-perf/tools/perf/perf.c:351
    #7 0x5c04956ee0a8 in handle_internal_command /home/howard/hw/linux-perf/tools/perf/perf.c:404
    #8 0x5c04956ee37f in run_argv /home/howard/hw/linux-perf/tools/perf/perf.c:448
    #9 0x5c04956ee8e9 in main /home/howard/hw/linux-perf/tools/perf/perf.c:556
    #10 0x79eb3622a3b7 in __libc_start_call_main ../sysdeps/nptl/libc_start_call_main.h:58
    #11 0x79eb3622a47a in __libc_start_main_impl ../csu/libc-start.c:360
    #12 0x5c04955422d4 in _start (/home/howard/hw/linux-perf/tools/perf/perf+0x4e02d4) (BuildId: 5b6cab2d59e96a4341741765ad6914a4d784dbc6)

     0.000 ( 0.014 ms): Chrome_ChildIO/117244 write(fd: 238, buf: !, count: 1)                                      = 1

Fixes: 5e58fcfaf4 ("perf trace: Allow allocating sc->arg_fmt even without the syscall tracepoint")
Signed-off-by: Howard Chu <howardchu95@gmail.com>
Link: https://lore.kernel.org/r/20250122025519.361873-1-howardchu95@gmail.com
Signed-off-by: Namhyung Kim <namhyung@kernel.org>
2025-01-28 09:27:27 -08:00
..
accounting
arch tools headers: Sync arm64 kvm header with the kernel sources 2024-12-04 14:34:49 -08:00
bootconfig
bpf bpftool: Link zstd lib required by libelf 2024-12-18 16:24:32 -03:00
build perf tools: Expose quiet/verbose variables in Makefile.perf 2025-01-16 10:59:20 -08:00
certs
cgroup
counter
crypto crypto: tools/ccp - Remove unused variable 2024-08-30 18:22:30 +08:00
debugging
firewire tools/firewire: Fix several incorrect format specifiers 2024-11-14 09:12:04 +09:00
firmware
gpio tools: gpio: Fix several incorrect format specifiers 2024-11-13 16:30:05 +01:00
hv hyperv-next for v6.12 2024-09-19 08:15:30 +02:00
iio iio: Add channel type for attention 2024-11-03 20:33:43 +00:00
include tools headers: Sync uapi/asm-generic/mman.h with the kernel sources 2024-12-04 14:34:50 -08:00
kvm/kvm_stat
laptop
leds
lib Merge remote-tracking branch 'torvalds/master' into perf-tools-next 2024-12-13 11:53:27 -03:00
memory-model tools/memory-model: simple.txt: Fix stale reference to recipes-pairs.txt 2024-09-13 23:56:44 -07:00
mm - The series "zram: optimal post-processing target selection" from 2024-11-23 09:58:07 -08:00
net NFSD 6.13 Release Notes 2024-11-26 12:59:30 -08:00
objtool Kbuild updates for v6.13 2024-11-30 13:41:50 -08:00
pci tools: PCI: Fix incorrect printf format specifiers 2024-11-20 14:20:51 -06:00
pcmcia
perf perf trace: Fix runtime error of index out of bounds 2025-01-28 09:27:27 -08:00
power turbostat version 2024.11.30 2024-11-30 18:30:22 -08:00
rcu
sched_ext sched_ext: Rename scx_bpf_dispatch[_vtime]_from_dsq*() -> scx_bpf_dsq_move[_vtime]*() 2024-11-11 07:06:16 -10:00
scripts perf tools: Create generic syscall table support 2025-01-09 12:49:49 -03:00
sound ASoC: dapm-graph: show path name for non-static routes 2024-08-23 11:03:00 +01:00
spi spi: spidev_test: add support for word delay 2024-11-07 15:25:50 +00:00
testing Including fixes from bluetooth, netfilter and wireless. 2024-12-12 11:28:05 -08:00
thermal tools/thermal: Fix common realloc mistake 2024-11-15 14:29:03 +01:00
time
tracing tracing/tools: Updates for 6.13 2024-11-22 13:24:22 -08:00
usb usbip: tools: Fix detach_port() invalid port error path 2024-10-29 04:23:23 +01:00
verification verification/dot2: Improve dot parser robustness 2024-11-19 08:57:13 -05:00
virtio Fix typo in vringh_test.c 2024-11-06 04:40:07 -05:00
wmi
workqueue
writeback
Makefile