Messages in this thread | | | Date | Sun, 28 Jul 2019 15:12:51 +0200 | From | Thomas Gleixner <> | Subject | [patch 0/5] lib/vdso, x86/vdso: Fix fallout from generic VDSO conversion |
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Several reporters noticed a regression with the new VDSO. 32bit user space applications are tripping over seccomp filters with 5.3-rc. The reason is that the 32bit VDSO syscall fallback uses clock_gettime64()/getres64() for simplicity reasons. Existing seccomp filters do not enable the new 64bit syscalls and prevent the applications from working correctly.
The following series addresses this by using the legacy 32bit syscall as fallback in 32bit VDSOs.
Note, using the legacy syscall fallback is opt-in for now because otherwise architectures which have their conversion queued in -next would break.
Once all are converted over, the conditional and the 64bit fallback implementation can be removed.
Thanks,
tglx
8<-------------- arch/arm64/include/asm/vdso/compat_gettimeofday.h | 40 +++++++ arch/x86/include/asm/vdso/gettimeofday.h | 36 +++++++ lib/vdso/gettimeofday.c | 111 +++++++++++++++------- 3 files changed, 156 insertions(+), 31 deletions(-)
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