lists  /  announce  owl-users  owl-dev  john-users  john-dev  passwdqc-users  yescrypt  popa3d-users  /  oss-security  kernel-hardening  musl  sabotage  tlsify  passwords  /  crypt-dev  xvendor  /  Bugtraq  Full-Disclosure  linux-kernel  linux-netdev  linux-ext4  linux-hardening  linux-cve-announce  PHC 
Open Source and information security mailing list archives
Hash Suite: Windows password security audit tool. GUI, reports in PDF.
[<prev] [next>] [<thread-prev] [day] [month] [year] [list]
Date:   Mon, 15 Apr 2019 17:36:58 +0000
From:   Paul Burton <>
To:     Aurelien Jarno <>
CC:     Ralf Baechle <>,
        Paul Burton <>,
        James Hogan <>,
        "" <>,
        "" <>,
        Aurelien Jarno <>,
        "" <>,
        "" <>
Subject: Re: [PATCH] MIPS: scall64-o32: Fix indirect syscall number load


Aurelien Jarno wrote:
> Commit 4c21b8fd8f14 (MIPS: seccomp: Handle indirect system calls (o32))
> added indirect syscall detection for O32 processes running on MIPS64,
> but it did not work correctly for big endian kernel/processes. The
> reason is that the syscall number is loaded from ARG1 using the lw
> instruction while this is a 64-bit value, so zero is loaded instead of
> the syscall number.
> Fix the code by using the ld instruction instead. When running a 32-bit
> processes on a 64 bit CPU, the values are properly sign-extended, so it
> ensures the value passed to syscall_trace_enter is correct.
> Recent systemd versions with seccomp enabled whitelist the getpid
> syscall for their internal  processes (e.g. systemd-journald), but call
> it through syscall(SYS_getpid). This fix therefore allows O32 big endian
> systems with a 64-bit kernel to run recent systemd versions.
> Signed-off-by: Aurelien Jarno <>
> Cc: <> # v3.15+
> Reviewed-by: Philippe Mathieu-Daudé <>

Applied to mips-fixes.


[ This message was auto-generated; if you believe anything is incorrect
  then please email to report it. ]

Powered by blists - more mailing lists