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sh: fix debug trap failure to process signals before return to user

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[ Upstream commit 96a598996f ]

When responding to a debug trap (breakpoint) in userspace, the
kernel's trap handler raised SIGTRAP but returned from the trap via a
code path that ignored pending signals, resulting in an infinite loop
re-executing the trapping instruction.

Signed-off-by: Rich Felker <dalias@libc.org>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Rich Felker 2018-03-15 20:01:36 -04:00 committed by Greg Kroah-Hartman
parent 2b1c1ad878
commit bec95d211f
1 changed files with 1 additions and 1 deletions
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arch/sh/kernel/entry-common.S
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@ -255,7 +255,7 @@ debug_trap:
mov.l @r8, r8
jsr @r8
nop
bra __restore_all
bra ret_from_exception
nop
CFI_ENDPROC