Actually lets close libqb with the sync then (when the Delta is
dropped).
** Changed in: libqb (Ubuntu)
Status: Fix Released => Triaged
--
You received this bug notification because you are a member of Kernel
Packages, which is subscribed to linux in Ubuntu.
https://bugs.launchpad.net/bugs/1239109
Title:
aarch64 clock_gettime with CLOCK_REALTIME_COARSE or
CLOCK_MONOTONIC_COARSE fails with SIGBUS or SIGSEGV
Status in libqb package in Ubuntu:
Triaged
Status in linux package in Ubuntu:
Fix Released
Bug description:
The aarch64 vDSO __kernel_clock_gettime implementation crashes when
clock_gettime is called with CLOCK_MONOTONIC_COARSE or
CLOCK_REALTIME_COARSE, with a SIGSEGV or SIGBUS respectively.
In the implementation
(http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/tree/arch/arm64/kernel/vdso/gettimeofday.S#n89)
a value other than CLOCK_REALTIME or CLOCK_MONOTONIC branches past the
usual "mov x2, x30" which preserves lr for return later. Anything
other than CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE then
branches directly to the svc call, which correctly returns to the
caller. But CLOCK_REALTIME_COARSE and CLOCK_MONOTONIC_COARSE execute
the special coarse path then fall through to the normal
CLOCK_REALTIME/CLOCK_MONOTONIC path, which does a 'ret x2' at the end,
despite not having saved x30 to x2 in the _COARSE case. So it ends up
setting pc to clk_id, which is either 4 or 5, giving a translation or
alignment fault.
To manage notifications about this bug go to:
https://bugs.launchpad.net/ubuntu/+source/libqb/+bug/1239109/+subscriptions
--
Mailing list: https://launchpad.net/~kernel-packages
Post to : [email protected]
Unsubscribe : https://launchpad.net/~kernel-packages
More help : https://help.launchpad.net/ListHelp
