Casey Chen 4c17736689 perf tool: fix dereferencing NULL al->maps ... With 0dd5041c9a ("perf addr_location: Add init/exit/copy functions"), when cpumode is 3 (macro PERF_RECORD_MISC_HYPERVISOR), thread__find_map() could return with al->maps being NULL. The path below could add a callchain_cursor_node with NULL ms.maps. add_callchain_ip() thread__find_symbol(.., &al) thread__find_map(.., &al) // al->maps becomes NULL ms.maps = maps__get(al.maps) callchain_cursor_append(..., &ms, ...) node->ms.maps = maps__get(ms->maps) Then the path below would dereference NULL maps and get segfault. fill_callchain_info() maps__machine(node->ms.maps); Fix it by checking if maps is NULL in fill_callchain_info(). Fixes: 0dd5041c9a ("perf addr_location: Add init/exit/copy functions") Signed-off-by: Casey Chen <cachen@purestorage.com> Reviewed-by: Ian Rogers <irogers@google.com> Reviewed-by: Arnaldo Carvalho de Melo <acme@redhat.com> Acked-by: Namhyung Kim <namhyung@kernel.org> Cc: yzhong@purestorage.com Link: https://lore.kernel.org/r/20240722211548.61455-1-cachen@purestorage.com Signed-off-by: Namhyung Kim <namhyung@kernel.org>		2024-07-26 11:12:16 -07:00
..
accounting
arch	tools headers arm64: Sync arm64's cputype.h with the kernel sources	2024-06-04 16:46:40 -03:00
bootconfig
bpf	bpf: Fix potential integer overflow in resolve_btfids	2024-05-24 17:12:12 +02:00
build	tools: Make pkg-config dependency checks usable by other tools	2024-07-17 13:14:35 -07:00
certs
cgroup
counter
crypto
debugging
firewire
firmware
gpio
hv
iio
include	perf tools fixes for v6.10: 2nd batch	2024-06-09 09:04:51 -07:00
kvm/kvm_stat
laptop
leds
lib	Merge remote-tracking branch 'perf-tools' into perf-tools-next	2024-07-02 11:51:32 -07:00
memory-model
mm
net/ynl	ynl: ensure exact-len value is resolved	2024-05-13 14:59:24 -07:00
objtool
pci
pcmcia
perf	perf tool: fix dereferencing NULL al->maps	2024-07-26 11:12:16 -07:00
power	tools/power/cpupower: Fix Pstate frequency reporting on AMD Family 1Ah CPUs	2024-05-28 09:22:57 -06:00
rcu
scripts
sound
spi
testing	s390 updates for 6.10-rc3	2024-06-07 14:44:53 -07:00
thermal
time
tracing	tools/latency: Use pkg-config in lib_setup of Makefile.config	2024-07-17 13:15:18 -07:00
usb
verification	tools/verification: Use pkg-config in lib_setup of Makefile.config	2024-07-17 13:14:51 -07:00
virtio
wmi
workqueue
writeback	writeback: add wb_monitor.py script to monitor writeback info on bdi	2024-05-05 17:53:51 -07:00
Makefile