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Commit 85cc91e2 authored by Elvira Khabirova's avatar Elvira Khabirova Committed by Thomas Bogendoerfer
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mips: fix syscall_get_nr

The implementation of syscall_get_nr on mips used to ignore the task
argument and return the syscall number of the calling thread instead of
the target thread.

The bug was exposed to user space by commit 201766a2 ("ptrace: add
PTRACE_GET_SYSCALL_INFO request") and detected by strace test suite.

Link: https://github.com/strace/strace/issues/235


Fixes: c2d9f177 ("MIPS: Fix syscall_get_nr for the syscall exit tracing.")
Cc: <stable@vger.kernel.org> # v3.19+
Co-developed-by: default avatarDmitry V. Levin <ldv@strace.io>
Signed-off-by: default avatarDmitry V. Levin <ldv@strace.io>
Signed-off-by: default avatarElvira Khabirova <lineprinter0@gmail.com>
Signed-off-by: default avatarThomas Bogendoerfer <tsbogend@alpha.franken.de>
parent 6f02e39f
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