On 2021-11-12 2:18 a.m., Sven Schnelle wrote:
Sven Schnelle <svens@xxxxxxxxxxxxxx> writes:commit 8779e05ba8aa ("parisc: Fix ptrace check on syscall return") fixed testing of TI_FLAGS. This uncovered a bug in the test mask. syscall_restore_rfi is only used when the kernel needs to exit to usespace with single stepping via recovery counter enabled. The test however used _TIF_SYSCALL_TRACE_MASK, which includes a lot of bits that shouldn't be tested here. Fix this by using TIF_SINGLESTEP and TIF_BLOCKSTEP directly and remove those bits from TIF_SYSCALL_TRACE_MASK.I think we need to have TIF_SINGLESTEP and TIF_BLOCKSTEP in TIF_SYSCALL_TRACE_MASK otherwise do_syscall_trace_exit() isn't called when leaving to userspace. I'll read the code a bit more during the weekend and prepare a v2.
Signal delivery is broken in 5.16.x. This causes a number of glibc and ada test regressions. -- John David Anglin dave.anglin@xxxxxxxx
