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authorAndy Lutomirski <luto@kernel.org>2021-03-04 11:05:54 -0800
committerBorislav Petkov <bp@suse.de>2021-03-06 13:10:06 +0100
commit5d5675df792ff67e74a500c4c94db0f99e6a10ef (patch)
treee9b463d979b295c7f5f05efe5723937ad73aef65 /fs/io-wq.h
parentb59cc97674c947861783ca92b9a6e7d043adba96 (diff)
x86/entry: Fix entry/exit mismatch on failed fast 32-bit syscalls
On a 32-bit fast syscall that fails to read its arguments from user memory, the kernel currently does syscall exit work but not syscall entry work. This confuses audit and ptrace. For example: $ ./tools/testing/selftests/x86/syscall_arg_fault_32 ... strace: pid 264258: entering, ptrace_syscall_info.op == 2 ... This is a minimal fix intended for ease of backporting. A more complete cleanup is coming. Fixes: 0b085e68f407 ("x86/entry: Consolidate 32/64 bit syscall entry") Signed-off-by: Andy Lutomirski <luto@kernel.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: stable@vger.kernel.org Link: https://lore.kernel.org/r/8c82296ddf803b91f8d1e5eac89e5803ba54ab0e.1614884673.git.luto@kernel.org
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