general protection fault in wait_consider

general protection fault in wait_consider_task
Status: upstream: reported on 2020/04/21 19:37
Reported-by: syzbot+c3b604da907fb0eb2466@syzkaller.appspotmail.com
First crash: 186d, last: 21d

similar bugs (3):
Kernel	Title	Repro	Bisected	Count	Last	Reported	Patched	Status
linux-4.14	general protection fault in wait_consider_task			2	167d	193d	0/1	auto-closed as invalid on 2020/09/02 23:50
linux-4.19	general protection fault in wait_consider_task	C	fix	5	388d	393d	1/1	fixed on 2019/12/10 03:52
linux-4.19	general protection fault in wait_consider_task (2)	C		1	15d	45d	0/1	upstream: reported C repro on 2020/09/04 22:53

Sample crash report:

general protection fault, probably for non-canonical address 0xe0eeeaee00eeeedb: 0000 [#1] PREEMPT SMP KASAN
KASAN: maybe wild-memory-access in range [0x07777770077776d8-0x07777770077776df]
CPU: 0 PID: 6936 Comm: syz-executor.1 Not tainted 5.9.0-rc7-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
RIP: 0010:wait_consider_task+0x95/0x3b70 kernel/exit.c:1269
Code: 48 8b 04 25 28 00 00 00 48 89 84 24 f0 00 00 00 31 c0 e8 de e9 2e 00 49 8d 8f 74 04 00 00 48 89 c8 48 89 4c 24 10 48 c1 e8 03 <0f> b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4b
RSP: 0018:ffffc90005707b20 EFLAGS: 00010207
RAX: 00eeeeee00eeeedb RBX: 0000000000000000 RCX: 07777770077776dc
RDX: ffff88809dbec100 RSI: ffffffff814754b2 RDI: ffffc90005707d20
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff89e09083
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90005707d20
R13: ffff88809dbec100 R14: 0000000000000000 R15: 0777777007777268
FS:  0000000002dd7940(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75d3fe3db8 CR3: 000000008e669000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 do_wait_thread kernel/exit.c:1378 [inline]
 do_wait+0x376/0xa00 kernel/exit.c:1449
 kernel_wait4+0x14c/0x260 kernel/exit.c:1621
 __do_sys_wait4+0x13f/0x150 kernel/exit.c:1649
 do_syscall_64+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xa9
RIP: 0033:0x41798b
Code: 54 55 41 89 d4 53 48 89 f5 89 fb 48 83 ec 10 e8 7b f9 ff ff 45 31 d2 41 89 c0 49 63 d4 48 89 ee 48 63 fb b8 3d 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 19 44 89 c7 89 44 24 0c e8 b1 f9 ff ff 8b 44
RSP: 002b:000000000169fd80 EFLAGS: 00000246 ORIG_RAX: 000000000000003d
RAX: ffffffffffffffda RBX: 00000000ffffffff RCX: 000000000041798b
RDX: 0000000040000001 RSI: 000000000169fde0 RDI: ffffffffffffffff
RBP: 000000000169fde0 R08: 0000000000000000 R09: 0000000002dd7940
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000040000001
R13: 000000000169fde0 R14: 00000000001c8cc4 R15: 000000000169fdf0
Modules linked in:
---[ end trace 5da899dc91de6805 ]---
RIP: 0010:wait_consider_task+0x95/0x3b70 kernel/exit.c:1269
Code: 48 8b 04 25 28 00 00 00 48 89 84 24 f0 00 00 00 31 c0 e8 de e9 2e 00 49 8d 8f 74 04 00 00 48 89 c8 48 89 4c 24 10 48 c1 e8 03 <0f> b6 14 28 48 89 c8 83 e0 07 83 c0 03 38 d0 7c 08 84 d2 0f 85 4b
RSP: 0018:ffffc90005707b20 EFLAGS: 00010207
RAX: 00eeeeee00eeeedb RBX: 0000000000000000 RCX: 07777770077776dc
RDX: ffff88809dbec100 RSI: ffffffff814754b2 RDI: ffffc90005707d20
RBP: dffffc0000000000 R08: 0000000000000001 R09: ffffffff89e09083
R10: 0000000000000000 R11: 0000000000000000 R12: ffffc90005707d20
R13: ffff88809dbec100 R14: 0000000000000000 R15: 0777777007777268
FS:  0000000002dd7940(0000) GS:ffff8880ae400000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f75d3fe3db8 CR3: 000000008e669000 CR4: 00000000001526f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (3):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Maintainers
ci-upstream-kasan-gce	2020/09/29 15:55	upstream	fb0155a0	1b88c6d5	.config	log	report	info	akpm@linux-foundation.org, christian@brauner.io, ebiederm@xmission.com, jannh@google.com, linux-kernel@vger.kernel.org, mingo@kernel.org, peterz@infradead.org, tglx@linutronix.de
ci-upstream-kasan-gce	2020/07/06 15:43	upstream	7cc2a8ea	51095195	.config	log	report		christian@brauner.io, ebiederm@xmission.com, jannh@google.com, linux-kernel@vger.kernel.org, mingo@kernel.org, oleg@redhat.com, peterz@infradead.org, tglx@linutronix.de
ci-upstream-kasan-gce-smack-root	2020/04/17 18:54	upstream	7a56db02	18397578	.config	log	report		christian@brauner.io, ebiederm@xmission.com, linux-kernel@vger.kernel.org, mingo@kernel.org, oleg@redhat.com, peterz@infradead.org, tglx@linutronix.de