mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2025-12-27 13:30:45 -05:00
Code Issues Packages Projects Releases Wiki Activity

Merge tag 'perf_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

Browse Source 
Pull perf fix from Borislav Petkov:

 - Fix a #GP in the perf user callchain code caused by a race between
   uprobe freeing the task and the bpf profiler unwinding the task's
   user stack

* tag 'perf_urgent_for_v6.13_rc7' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  uprobes: Fix race in uprobe_free_utask
This commit is contained in:
Linus Torvalds
2025-01-12 11:57:45 -08:00
parent f31acaef55 b583ef82b6
commit a603abe345
1 changed files with 1 additions and 1 deletions
Download Patch File Download Diff File Expand all files Collapse all files

2
kernel/events/uprobes.c
View File

@@ -1915,6 +1915,7 @@ void uprobe_free_utask(struct task_struct *t)
if (!utask)
return;
t->utask = NULL;
WARN_ON_ONCE(utask->active_uprobe || utask->xol_vaddr);
timer_delete_sync(&utask->ri_timer);
@@ -1924,7 +1925,6 @@ void uprobe_free_utask(struct task_struct *t)
ri = free_ret_instance(ri, true /* cleanup_hprobe */);
kfree(utask);
t->utask = NULL;
}
#define RI_TIMER_PERIOD (HZ / 10) /* 100 ms */