diff options
| author | Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com> | 2017-07-07 22:37:26 +0530 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2017-07-08 11:05:35 +0200 |
| commit | dbf580623d5fee785218d1a47a2bcdf36d85c0e9 (patch) | |
| tree | 9aab0861ecd7bcb74af595243f19b27057866123 | |
| parent | 0f73ff80b751b39ff539a550e65c5bd131ff0316 (diff) | |
| download | linux-dbf580623d5fee785218d1a47a2bcdf36d85c0e9.tar.bz2 | |
kprobes: Ensure that jprobe probepoints are at function entry
Similar to commit 90ec5e89e393c ("kretprobes: Ensure probe location is
at function entry"), ensure that the jprobe probepoint is at function
entry.
Signed-off-by: Naveen N. Rao <naveen.n.rao@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Masami Hiramatsu <mhiramat@kernel.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/a4525af6c5a42df385efa31251246cf7cca73598.1499443367.git.naveen.n.rao@linux.vnet.ibm.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
| -rw-r--r-- | kernel/kprobes.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/kernel/kprobes.c b/kernel/kprobes.c index db3cd3e60bdd..a1606a4224e1 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -1795,10 +1795,14 @@ int register_jprobe(struct jprobe *jp) unsigned long addr, offset; struct kprobe *kp = &jp->kp; - /* Verify probepoint is a function entry point */ + /* + * Verify probepoint as well as the jprobe handler are + * valid function entry points. + */ addr = arch_deref_entry_point(jp->entry); - if (kallsyms_lookup_size_offset(addr, NULL, &offset) && offset == 0) { + if (kallsyms_lookup_size_offset(addr, NULL, &offset) && offset == 0 && + kprobe_on_func_entry(kp->addr, kp->symbol_name, kp->offset)) { kp->pre_handler = setjmp_pre_handler; kp->break_handler = longjmp_break_handler; return register_kprobe(kp); |