Daniel T. Lee 96b2eb6e77 tools, bpftool: Fix struct_ops command invalid pointer free ... In commit 65c9362859 ("bpftool: Add struct_ops support") a new type of command named struct_ops has been added. This command requires a kernel with CONFIG_DEBUG_INFO_BTF=y set and for retrieving BTF info in bpftool, the helper get_btf_vmlinux() is used. When running this command on kernel without BTF debug info, this will lead to 'btf_vmlinux' variable being an invalid(error) pointer. And by this, btf_free() causes a segfault when executing 'bpftool struct_ops'. This commit adds pointer validation with IS_ERR not to free invalid pointer, and this will fix the segfault issue. Fixes: 65c9362859 ("bpftool: Add struct_ops support") Signed-off-by: Daniel T. Lee <danieltimlee@gmail.com> Signed-off-by: Daniel Borkmann <daniel@iogearbox.net> Acked-by: Martin KaFai Lau <kafai@fb.com> Link: https://lore.kernel.org/bpf/20200410020612.2930667-1-danieltimlee@gmail.com		2020-04-14 21:33:53 +02:00
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bpftool	tools, bpftool: Fix struct_ops command invalid pointer free	2020-04-14 21:33:53 +02:00
runqslower	SPDX patches for 5.7-rc1.	2020-04-03 13:12:26 -07:00
.gitignore	.gitignore: add SPDX License Identifier	2020-03-25 11:50:48 +01:00
bpf_asm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232	2019-06-19 17:09:06 +02:00
bpf_dbg.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232	2019-06-19 17:09:06 +02:00
bpf_exp.l	bpf: fix cbpf parser bug for octal numbers	2018-06-03 07:46:55 -07:00
bpf_exp.y	tools, bpf_asm: Warn when jumps are out of range	2019-11-07 16:01:34 +01:00
bpf_jit_disasm.c	treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 232	2019-06-19 17:09:06 +02:00
Makefile	tools/bpf: Add runqslower tool to tools/bpf	2020-01-13 17:48:13 -08:00
Makefile.helpers	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00