]> git.karo-electronics.de Git - karo-tx-linux.git/commit
arm64: Clear out any singlestep state on a ptrace detach operation
authorJohn Blackwood <john.blackwood@ccur.com>
Mon, 7 Dec 2015 11:50:34 +0000 (11:50 +0000)
committerWill Deacon <will.deacon@arm.com>
Mon, 7 Dec 2015 17:48:21 +0000 (17:48 +0000)
commit5db4fd8c52810bd9740c1240ebf89223b171aa70
tree213deabc4c5440083bbcd761bf6ac91c098b1f6d
parentdb3899a6477a4dccd26cbfb7f408b6be2cc068e0
arm64: Clear out any singlestep state on a ptrace detach operation

Make sure to clear out any ptrace singlestep state when a ptrace(2)
PTRACE_DETACH call is made on arm64 systems.

Otherwise, the previously ptraced task will die off with a SIGTRAP
signal if the debugger just previously singlestepped the ptraced task.

Cc: <stable@vger.kernel.org>
Signed-off-by: John Blackwood <john.blackwood@ccur.com>
[will: added comment to justify why this is in the arch code]
Signed-off-by: Will Deacon <will.deacon@arm.com>
arch/arm64/kernel/ptrace.c