diff options
| author | Greg Kroah-Hartman <[email protected]> | 2023-12-11 08:39:35 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <[email protected]> | 2023-12-11 08:39:35 +0100 |
| commit | 0e42b5fee8a8c5bc173f702b0745da6d9329c714 (patch) | |
| tree | a71b0daded5764fcc33b88f9344872c13f4b488e /include/linux/kprobes.h | |
| parent | 386a766c4169006d0e9df44823849930b8995e32 (diff) | |
| parent | a39b6ac3781d46ba18193c9dbb2110f31e9bffe9 (diff) | |
Merge 6.7-rc5 into char-misc-next
We need the char/misc fixes in here as well for testing and to build off
of.
Signed-off-by: Greg Kroah-Hartman <[email protected]>
Diffstat (limited to 'include/linux/kprobes.h')
| -rw-r--r-- | include/linux/kprobes.h | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/include/linux/kprobes.h b/include/linux/kprobes.h index ab1da3142b06..0ff44d6633e3 100644 --- a/include/linux/kprobes.h +++ b/include/linux/kprobes.h @@ -139,7 +139,7 @@ static inline bool kprobe_ftrace(struct kprobe *p) * */ struct kretprobe_holder { - struct kretprobe *rp; + struct kretprobe __rcu *rp; struct objpool_head pool; }; @@ -197,10 +197,8 @@ extern int arch_trampoline_kprobe(struct kprobe *p); #ifdef CONFIG_KRETPROBE_ON_RETHOOK static nokprobe_inline struct kretprobe *get_kretprobe(struct kretprobe_instance *ri) { - RCU_LOCKDEP_WARN(!rcu_read_lock_any_held(), - "Kretprobe is accessed from instance under preemptive context"); - - return (struct kretprobe *)READ_ONCE(ri->node.rethook->data); + /* rethook::data is non-changed field, so that you can access it freely. */ + return (struct kretprobe *)ri->node.rethook->data; } static nokprobe_inline unsigned long get_kretprobe_retaddr(struct kretprobe_instance *ri) { @@ -245,10 +243,7 @@ unsigned long kretprobe_trampoline_handler(struct pt_regs *regs, static nokprobe_inline struct kretprobe *get_kretprobe(struct kretprobe_instance *ri) { - RCU_LOCKDEP_WARN(!rcu_read_lock_any_held(), - "Kretprobe is accessed from instance under preemptive context"); - - return READ_ONCE(ri->rph->rp); + return rcu_dereference_check(ri->rph->rp, rcu_read_lock_any_held()); } static nokprobe_inline unsigned long get_kretprobe_retaddr(struct kretprobe_instance *ri) |