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https://github.com/AuxXxilium/linux_dsm_epyc7002.git
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f0a5157803
While the dest comm string size is assured to be at least TASK_COMM_LEN long, doing a memcpy() also adds the assumption that the source is at least that long as well, which isn't assured, and isn't true in cases such as: set_task_comm(worker->task, "kworker/dying"); This leads to accessing invalid memory. Link: http://lkml.kernel.org/r/1440760018-1557-1-git-send-email-sasha.levin@oracle.com Signed-off-by: Sasha Levin <sasha.levin@oracle.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
62 lines
1.5 KiB
C
62 lines
1.5 KiB
C
#undef TRACE_SYSTEM
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#define TRACE_SYSTEM task
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#if !defined(_TRACE_TASK_H) || defined(TRACE_HEADER_MULTI_READ)
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#define _TRACE_TASK_H
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#include <linux/tracepoint.h>
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TRACE_EVENT(task_newtask,
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TP_PROTO(struct task_struct *task, unsigned long clone_flags),
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TP_ARGS(task, clone_flags),
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TP_STRUCT__entry(
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__field( pid_t, pid)
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__array( char, comm, TASK_COMM_LEN)
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__field( unsigned long, clone_flags)
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__field( short, oom_score_adj)
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),
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TP_fast_assign(
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__entry->pid = task->pid;
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memcpy(__entry->comm, task->comm, TASK_COMM_LEN);
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__entry->clone_flags = clone_flags;
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__entry->oom_score_adj = task->signal->oom_score_adj;
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),
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TP_printk("pid=%d comm=%s clone_flags=%lx oom_score_adj=%hd",
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__entry->pid, __entry->comm,
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__entry->clone_flags, __entry->oom_score_adj)
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);
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TRACE_EVENT(task_rename,
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TP_PROTO(struct task_struct *task, const char *comm),
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TP_ARGS(task, comm),
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TP_STRUCT__entry(
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__field( pid_t, pid)
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__array( char, oldcomm, TASK_COMM_LEN)
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__array( char, newcomm, TASK_COMM_LEN)
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__field( short, oom_score_adj)
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),
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TP_fast_assign(
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__entry->pid = task->pid;
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memcpy(entry->oldcomm, task->comm, TASK_COMM_LEN);
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strlcpy(entry->newcomm, comm, TASK_COMM_LEN);
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__entry->oom_score_adj = task->signal->oom_score_adj;
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),
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TP_printk("pid=%d oldcomm=%s newcomm=%s oom_score_adj=%hd",
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__entry->pid, __entry->oldcomm,
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__entry->newcomm, __entry->oom_score_adj)
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);
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#endif
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/* This part must be outside protection */
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#include <trace/define_trace.h>
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