Ravi Bangoria 1aed58e67a Uprobes: Fix kernel oops with delayed_uprobe_remove() ... There could be a race between task exit and probe unregister: exit_mm() mmput() __mmput() uprobe_unregister() uprobe_clear_state() put_uprobe() delayed_uprobe_remove() delayed_uprobe_remove() put_uprobe() is calling delayed_uprobe_remove() without taking delayed_uprobe_lock and thus the race sometimes results in a kernel crash. Fix this by taking delayed_uprobe_lock before calling delayed_uprobe_remove() from put_uprobe(). Detailed crash log can be found at: Link: http://lkml.kernel.org/r/000000000000140c370577db5ece@google.com Link: http://lkml.kernel.org/r/20181205033423.26242-1-ravi.bangoria@linux.ibm.com Acked-by: Oleg Nesterov <oleg@redhat.com> Reviewed-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com> Reported-by: syzbot+cb1fb754b771caca0a88@syzkaller.appspotmail.com Fixes: 1cc33161a8 ("uprobes: Support SDT markers having reference count (semaphore)") Signed-off-by: Ravi Bangoria <ravi.bangoria@linux.ibm.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2018-12-05 23:05:13 -05:00
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callchain.c	treewide: convert ISO_8859-1 text comments to utf-8	2018-08-23 18:48:43 -07:00
core.c	Merge branch 'perf-urgent-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2018-11-03 18:13:43 -07:00
hw_breakpoint.c	perf/hw_breakpoint: Enable breakpoint in modify_user_hw_breakpoint	2018-08-30 14:49:23 -03:00
internal.h	perf: Make perf_callchain function static	2018-01-08 12:33:01 -03:00
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: Suppress AUX/OVERWRITE records	2018-09-18 17:21:13 -03:00
uprobes.c	Uprobes: Fix kernel oops with delayed_uprobe_remove()	2018-12-05 23:05:13 -05:00