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author | Hengqi Chen <hengqi.chen@gmail.com> | 2023-12-09 10:49:15 +0300 |
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committer | Huacai Chen <chenhuacai@loongson.cn> | 2023-12-09 10:49:15 +0300 |
commit | d6c5f06e46a836e6a70c7cfd95bb38a67d9252ec (patch) | |
tree | 4c0f0e9285c938ebb4ed74d3366e62be36107996 /lib/zlib_inflate | |
parent | 97ceddbc9404a7d1e2c4049435bff29427d762cc (diff) | |
download | linux-d6c5f06e46a836e6a70c7cfd95bb38a67d9252ec.tar.xz |
LoongArch: Preserve syscall nr across execve()
Currently, we store syscall nr in pt_regs::regs[11] and syscall execve()
accidentally overrides it during its execution:
sys_execve()
-> do_execve()
-> do_execveat_common()
-> bprm_execve()
-> exec_binprm()
-> search_binary_handler()
-> load_elf_binary()
-> ELF_PLAT_INIT()
ELF_PLAT_INIT() reset regs[11] to 0, so in syscall_exit_to_user_mode()
we later get a wrong syscall nr. This breaks tools like execsnoop since
it relies on execve() tracepoints.
Skip pt_regs::regs[11] reset in ELF_PLAT_INIT() to fix the issue.
Signed-off-by: Hengqi Chen <hengqi.chen@gmail.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
Diffstat (limited to 'lib/zlib_inflate')
0 files changed, 0 insertions, 0 deletions