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From 522ad3a0e73148dadd2480cd9cec84d9112b2e57 Mon Sep 17 00:00:00 2001
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From: Eugene Syromyatnikov <evgsyr@gmail.com>
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Date: Tue, 4 Sep 2018 14:48:13 +0200
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Subject: [PATCH] syscall.c: avoid infinite loop in subcalls parsing
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clang complains about it, so it might be a good reason to refactor it
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into something more linear.
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* syscall.c (syscall_entering_decode): Put syscall subcall decoding
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before ipc/socket subcall decoding, remove the loop.
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---
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syscall.c | 19 ++++++-------------
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1 file changed, 6 insertions(+), 13 deletions(-)
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diff --git a/syscall.c b/syscall.c
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index bae7343..a67d744 100644
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--- a/syscall.c
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+++ b/syscall.c
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@@ -579,11 +579,13 @@ syscall_entering_decode(struct tcb *tcp)
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return res;
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}
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+# ifdef SYS_syscall_subcall
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+ if (tcp_sysent(tcp)->sen == SEN_syscall)
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+ decode_syscall_subcall(tcp);
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+# endif
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#if defined SYS_ipc_subcall \
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- || defined SYS_socket_subcall \
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- || defined SYS_syscall_subcall
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- for (;;) {
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- switch (tcp_sysent(tcp)->sen) {
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+ || defined SYS_socket_subcall
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+ switch (tcp_sysent(tcp)->sen) {
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# ifdef SYS_ipc_subcall
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case SEN_ipc:
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decode_ipc_subcall(tcp);
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@@ -594,15 +596,6 @@ syscall_entering_decode(struct tcb *tcp)
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decode_socket_subcall(tcp);
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break;
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# endif
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-# ifdef SYS_syscall_subcall
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- case SEN_syscall:
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- decode_syscall_subcall(tcp);
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- if (tcp_sysent(tcp)->sen != SEN_syscall)
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- continue;
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- break;
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-# endif
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- }
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- break;
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}
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#endif
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--
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2.1.4
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