general protection fault in scatterwalk

general protection fault in scatterwalk_copychunks (4)
Status: upstream: reported C repro on 2021/03/16 06:48
Reported-by: syzbot+66e3ea42c4b176748b9c@syzkaller.appspotmail.com
First crash: 260d, last: 13d

Cause bisection: introduced by (bisect log) :
commit 635d9398178659d8ddba79dd061f9451cec0b4d1
Author: Vadim Fedorenko <vfedorenko@novek.ru>
Date: Wed May 20 08:41:44 2020 +0000

net/tls: free record only on encryption error

Crash: general protection fault in gcmaes_crypt_by_sg (log)
Repro: C syz .config

similar bugs (8):
Kernel	Title	Repro	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in scatterwalk_copychunks (3)	C		95	1131d	1257d	0/22	closed as invalid on 2019/06/10 23:08
upstream	general protection fault in scatterwalk_copychunks (2)	C		141	1422d	1449d	3/22	fixed on 2018/01/11 01:23
linux-4.14	general protection fault in scatterwalk_copychunks	C		182	14d	951d	0/1	upstream: reported C repro on 2019/04/21 07:15
linux-4.19	general protection fault in scatterwalk_copychunks	C		103	12d	891d	0/1	upstream: reported C repro on 2019/06/20 18:59
upstream	general protection fault in scatterwalk_copychunks	C		414	1450d	1460d	3/22	fixed on 2017/12/08 02:32
linux-4.14	KASAN: use-after-free Read in scatterwalk_copychunks	C	inconclusive	4	297d	951d	0/1	upstream: reported C repro on 2019/04/21 07:18
linux-4.19	KASAN: use-after-free Read in scatterwalk_copychunks	C	error	9	51d	786d	0/1	upstream: reported C repro on 2019/10/03 04:34
linux-4.14	KASAN: slab-out-of-bounds Read in scatterwalk_copychunks	C	inconclusive	6	304d	808d	0/1	upstream: reported C repro on 2019/09/11 08:57

Sample crash report:

general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN
KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f]
CPU: 0 PID: 148 Comm: kworker/u4:2 Not tainted 5.14.0-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Workqueue: pencrypt_parallel padata_parallel_worker
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:68 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:77 [inline]
RIP: 0010:scatterwalk_copychunks+0x4db/0x6a0 crypto/scatterwalk.c:50
Code: ff df 80 3c 02 00 0f 85 b4 01 00 00 49 8d 44 24 08 4d 89 26 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 77 01 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc900010af620 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff83d6d873 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88801e002a1b
R10: ffffffff83d6d823 R11: 0000000000086089 R12: 0000000000000000
R13: 0000000000000001 R14: ffffc900010af880 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd858b2f28 CR3: 000000001ac1b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 skcipher_next_slow crypto/skcipher.c:278 [inline]
 skcipher_walk_next+0x7af/0x1680 crypto/skcipher.c:363
 skcipher_walk_first+0xf8/0x3c0 crypto/skcipher.c:446
 skcipher_walk_aead_common+0x7a5/0xbc0 crypto/skcipher.c:539
 gcmaes_crypt_by_sg+0x31d/0x890 arch/x86/crypto/aesni-intel_glue.c:658
 gcmaes_encrypt+0xe2/0x230 arch/x86/crypto/aesni-intel_glue.c:722
 generic_gcmaes_encrypt+0x12e/0x190 arch/x86/crypto/aesni-intel_glue.c:1076
 crypto_aead_encrypt+0xaa/0xf0 crypto/aead.c:94
 crypto_aead_encrypt+0xaa/0xf0 crypto/aead.c:94
 pcrypt_aead_enc+0x13/0x70 crypto/pcrypt.c:82
 padata_parallel_worker+0x60/0xb0 kernel/padata.c:144
 process_one_work+0x9bf/0x16b0 kernel/workqueue.c:2297
 worker_thread+0x658/0x11f0 kernel/workqueue.c:2444
 kthread+0x3e5/0x4d0 kernel/kthread.c:319
 ret_from_fork+0x1f/0x30 arch/x86/entry/entry_64.S:295
Modules linked in:
---[ end trace bf024fb2779d2d23 ]---
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:68 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:77 [inline]
RIP: 0010:scatterwalk_copychunks+0x4db/0x6a0 crypto/scatterwalk.c:50
Code: ff df 80 3c 02 00 0f 85 b4 01 00 00 49 8d 44 24 08 4d 89 26 48 89 c2 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <0f> b6 04 02 84 c0 74 08 3c 03 0f 8e 77 01 00 00 48 b8 00 00 00 00
RSP: 0018:ffffc900010af620 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff83d6d873 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88801e002a1b
R10: ffffffff83d6d823 R11: 0000000000086089 R12: 0000000000000000
R13: 0000000000000001 R14: ffffc900010af880 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd858b2f28 CR3: 000000001ac1b000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
----------------
Code disassembly (best guess), 1 bytes skipped:
   0:	df 80 3c 02 00 0f    	filds  0xf00023c(%rax)
   6:	85 b4 01 00 00 49 8d 	test   %esi,-0x72b70000(%rcx,%rax,1)
   d:	44 24 08             	rex.R and $0x8,%al
  10:	4d 89 26             	mov    %r12,(%r14)
  13:	48 89 c2             	mov    %rax,%rdx
  16:	48 89 44 24 18       	mov    %rax,0x18(%rsp)
  1b:	48 b8 00 00 00 00 00 	movabs $0xdffffc0000000000,%rax
  22:	fc ff df
  25:	48 c1 ea 03          	shr    $0x3,%rdx
* 29:	0f b6 04 02          	movzbl (%rdx,%rax,1),%eax <-- trapping instruction
  2d:	84 c0                	test   %al,%al
  2f:	74 08                	je     0x39
  31:	3c 03                	cmp    $0x3,%al
  33:	0f 8e 77 01 00 00    	jle    0x1b0
  39:	48                   	rex.W
  3a:	b8 00 00 00 00       	mov    $0x0,%eax

Fix bisection attempts:
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce	2021/10/12 18:24	upstream	fa5878760579	5ae8508a	.config	log	report	syz	C

Crashes (63):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info	Title
ci-upstream-kasan-gce	2021/09/12 04:35	upstream	c605c39677b9	5ae8508a	.config	log	report	syz	C		general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/13 10:03	upstream	f8fbb47c6e86	3fd2ea69	.config	log	report	syz	C		general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/08/13 10:35	net	700fa08da43e	3fd2ea69	.config	log	report	syz	C		general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/08/13 10:38	net-next	bed5a942e27e	3fd2ea69	.config	log	report	syz	C		general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/09/11 22:22	upstream	c605c39677b9	5ae8508a	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-smack-root	2021/09/10 07:47	upstream	bf9f243f23e6	e2776ee4	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-smack-root	2021/08/29 22:28	upstream	3f5ad13cb012	be2c130d	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/27 22:05	upstream	1a6436f37512	d5a29e53	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/22 04:23	upstream	fa54d366a6e4	b599f2fc	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/14 03:26	upstream	dfa377c35d70	2489ab88	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/12 22:22	upstream	f8fbb47c6e86	3fd2ea69	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-smack-root	2021/08/12 21:14	upstream	f8fbb47c6e86	3fd2ea69	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/04 21:36	upstream	251a1524293d	b97d64c9	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/02 10:44	upstream	c500bee1c5b2	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce	2021/08/01 22:28	upstream	d4affd6b6e81	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce	2021/08/01 22:09	upstream	d4affd6b6e81	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/01 21:11	upstream	d4affd6b6e81	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/01 01:06	upstream	f3438b4c4e69	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/01 00:33	upstream	f3438b4c4e69	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-smack-root	2021/08/01 00:21	upstream	f3438b4c4e69	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/07/31 23:29	upstream	f3438b4c4e69	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/05/03 17:15	upstream	d2b6f8a17919	ad61f371	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/03/23 18:24	upstream	84196390620a	e613994b	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/03/23 00:59	upstream	84196390620a	8092f30d	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-smack-root	2021/03/22 23:23	upstream	84196390620a	8092f30d	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-386	2021/09/01 22:29	upstream	835d31d319d9	7eb7e152	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-386	2021/08/05 06:25	upstream	251a1524293d	7f7bb950	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-386	2021/03/22 23:25	upstream	84196390620a	8092f30d	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/11/14 11:35	net	70701b83e208	83f5c9b5	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/08/28 20:30	net	0d55649d2ad7	be2c130d	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/07/31 23:22	net	c7d102232649	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/07/06 12:29	net	c6c205ed442e	6c4484eb	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/07/04 20:22	net	dbe69e433722	55aa55c2	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/06/19 01:16	net	35036d69b9bd	aba2b2fb	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/06/14 21:01	net	49a10c7b1762	1ba81399	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/06/12 01:32	net	f4cdcae03f9c	1ba81399	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/06/12 00:43	net	f4cdcae03f9c	1ba81399	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/06/11 11:41	net	232e3683b4ee	1ba81399	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/06/10 04:20	net	13c62f5371e3	1ba81399	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/03/11 22:47	net	47142ed6c34d	429d8a6b	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/11/04 03:49	net-next	cc0356d6a02e	4c1be0be	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/09/10 10:40	net-next	626bf91a292e	5ae8508a	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/09/09 14:25	net-next	626bf91a292e	e2776ee4	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/08/29 02:08	net-next	c77225119daa	be2c130d	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/08/17 22:33	net-next	752be2976405	a2fe1cb5	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/08/13 12:23	net-next	b769cf44ed55	3fd2ea69	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/07/31 17:36	net-next	3e12361b6d23	6c236867	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/06/26 17:19	net-next	ff8744b5eb11	9d2ab5df	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/06/12 11:05	net-next	1f1aa3fe0214	1ba81399	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/05/02 02:29	net-next	95aafe911db6	77e2b668	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-net-kasan-gce	2021/04/28 04:18	net-next	95aafe911db6	805b5003	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-linux-next-kasan-gce-root	2021/09/10 12:27	linux-next	aa14a3016182	5ae8508a	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-linux-next-kasan-gce-root	2021/09/10 06:35	linux-next	aa14a3016182	e2776ee4	.config	log	report			info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/10 04:03	upstream	9a73fa375d58	6972b106	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/08 23:35	upstream	36a21d51725a	6972b106	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-qemu-upstream	2021/08/04 16:06	upstream	d5ad8ec3cfb5	b97d64c9	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/01 20:56	upstream	d4affd6b6e81	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/08/01 00:16	upstream	f3438b4c4e69	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/08/01 00:08	upstream	f3438b4c4e69	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/07/31 23:58	upstream	f3438b4c4e69	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/07/31 23:57	upstream	f3438b4c4e69	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/07/31 23:51	upstream	f3438b4c4e69	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks
ci-upstream-kasan-gce-root	2021/07/31 15:37	upstream	c7d102232649	6c236867	.config	log	report			info	KASAN: use-after-free Read in scatterwalk_copychunks