[S390] ptrace: fix return value of do_syscall_trace_enter()

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strace may change the system call number, so regs->gprs[2] must not
be read before tracehook_report_syscall_entry(). This fixes a bug
where "strace -f" will hang after a vfork().

Cc: <stable@kernel.org>
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Gerald Schaefer 2010-05-12 09:32:12 +02:00 • committed by Martin Schwidefsky

parent 1c1e093cbf

commit 545c174d1f

1 changed files with 2 additions and 3 deletions

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arch/s390/kernel/ptrace.c

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