peterz@infradead.org 78af4dc949 perf: Break deadlock involving exec_update_mutex ... Syzbot reported a lock inversion involving perf. The sore point being perf holding exec_update_mutex() for a very long time, specifically across a whole bunch of filesystem ops in pmu::event_init() (uprobes) and anon_inode_getfile(). This then inverts against procfs code trying to take exec_update_mutex. Move the permission checks later, such that we need to hold the mutex over less code. Reported-by: syzbot+db9cdf3dd1f64252c6ef@syzkaller.appspotmail.com Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>		2020-12-09 17:08:57 +01:00
..
callchain.c	uaccess: add force_uaccess_{begin,end} helpers	2020-08-12 10:57:59 -07:00
core.c	perf: Break deadlock involving exec_update_mutex	2020-12-09 17:08:57 +01:00
hw_breakpoint.c	powerpc/watchpoint: Don't allow concurrent perf and ptrace events	2020-05-19 00:14:45 +10:00
internal.h	perf: Optimize get_recursion_context()	2020-11-09 18:12:34 +01:00
Makefile	License cleanup: add SPDX GPL-2.0 license identifier to files with no license	2017-11-02 11:10:55 +01:00
ring_buffer.c	perf: Reduce stack usage of perf_output_begin()	2020-11-09 18:12:33 +01:00
uprobes.c	task_work: cleanup notification modes	2020-10-17 15:05:30 -06:00