kernel panic: stack is corrupted in get_kernel_gp

kernel panic: stack is corrupted in get_kernel_gp_address

Status: fixed on 2020/11/16 12:12
Subsystems: kernel
[Documentation on labels]
Reported-by: syzbot+d6459d8f8984c0929e54@syzkaller.appspotmail.com
Fix commit: a49145acfb97 fbmem: add margin check to fb_check_caps()
First crash: 1325d, last: 1289d

Cause bisection: the issue happens on the oldest tested release (bisect log)
Crash: WARNING in sysfs_warn_dup (log)
Repro: syz .config

Fix bisection: fixed by (bisect log) :
commit a49145acfb975d921464b84fe00279f99827d816
Author: George Kennedy <george.kennedy@oracle.com>
Date: Tue Jul 7 19:26:03 2020 +0000

fbmem: add margin check to fb_check_caps()

▶ ▼ Discussions (1)

Title	Replies (including bot)	Last reply
kernel panic: stack is corrupted in get_kernel_gp_address	1 (3)	2020/11/13 09:38

▶ ▼ Fix bisection attempts (2)


Created	Duration	User	Patch	Repo	Result
2020/11/13 05:47	2h39m	bisect fix		upstream	job log (1)
2020/10/14 02:35	16m	bisect fix		upstream	job log (0) log

Sample crash report:

³ŠµACode: Bad RIP value.
Kernel panic - not syncing: stack-protector: Kernel stack is corrupted in: get_kernel_gp_address+0x1a0/0x1c0 arch/x86/kernel/traps.c:520
Kernel Offset: disabled

Crashes (1):
Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Assets (help?)	Manager	Title
2020/09/08 00:39	upstream	f4d51dffc6c0	abf9ba4f	.config	console log	report	syz				ci-upstream-kasan-gce-386

* ~~Struck through~~ repros no longer work on HEAD.