Re: [PATCH] ARM: ptrace: fix scno of -1 cause SIGILL
From: Lecopzer Chen <hidden>
Date: 2023-08-07 07:54:24
Also in:
lkml
In commit [1], the -1 scno is used as a special scno when the task's syscall is traced.
After commit [2], PTRACE_SET_SYSCALL will always mask syscall with __NR_SYSCALL_MASK, this makes the condition `cmp scno, #-1` broken, and some test like Android VTS[3] is also failed because SIGILL interrupt the test program.
Let's test with `and` logic with #0x0ff000. Instead of #__NR_SYSCALL_MASK because of the constraint of ARM Operand2 rules and avoid conflicting with ARM private syscall.
... Please follow the commit from Kees below and ignore this patch, thanks. https://lore.kernel.org/all/20230804071045.never.134-kees@kernel.org/ (local) _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel