general protection fault in scatterwalk

general protection fault in scatterwalk_copychunks (4)
Status: upstream: reported on 2021/03/16 06:48
Reported-by: syzbot+66e3ea42c4b176748b9c@syzkaller.appspotmail.com
First crash: 42d, last: 30d

similar bugs (8):
Kernel	Title	Repro	Fix bisect	Count	Last	Reported	Patched	Status
upstream	general protection fault in scatterwalk_copychunks (3)	C		95	913d	1039d	0/22	closed as invalid on 2019/06/10 23:08
upstream	general protection fault in scatterwalk_copychunks (2)	C		141	1204d	1231d	3/22	fixed on 2018/01/11 01:23
linux-4.14	general protection fault in scatterwalk_copychunks	C		176	1d01h	733d	0/1	upstream: reported C repro on 2019/04/21 07:15
linux-4.19	general protection fault in scatterwalk_copychunks	C		83	2d12h	672d	0/1	upstream: reported C repro on 2019/06/20 18:59
upstream	general protection fault in scatterwalk_copychunks	C		414	1232d	1241d	3/22	fixed on 2017/12/08 02:32
linux-4.14	KASAN: use-after-free Read in scatterwalk_copychunks	C	inconclusive	4	78d	733d	0/1	upstream: reported C repro on 2019/04/21 07:18
linux-4.19	KASAN: use-after-free Read in scatterwalk_copychunks	C		7	8d18h	568d	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	86d	590d	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: 9 Comm: kworker/u4:0 Not tainted 5.12.0-rc4-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:93 [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:ffffc90000cff620 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff83c5e993 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88802f5eae9b
R10: ffffffff83c5e943 R11: 0000000000084087 R12: 0000000000000000
R13: 0000000000000001 R14: ffffc90000cff880 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000006edeb000 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+0x323/0x8a0 arch/x86/crypto/aesni-intel_glue.c:658
Modules linked in:
---[ end trace 8936f572e55c95ba ]---
RIP: 0010:scatterwalk_start include/crypto/scatterwalk.h:68 [inline]
RIP: 0010:scatterwalk_pagedone include/crypto/scatterwalk.h:93 [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:ffffc90000cff620 EFLAGS: 00010202
RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000
RDX: 0000000000000001 RSI: ffffffff83c5e993 RDI: 0000000000000003
RBP: 0000000000000000 R08: 0000000000000000 R09: ffff88802f5eae9b
R10: ffffffff83c5e943 R11: 0000000000084087 R12: 0000000000000000
R13: 0000000000000001 R14: ffffc90000cff880 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000000020000080 CR3: 000000006edeb000 CR4: 00000000001506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400

Crashes (5):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	VM info	Title
ci-upstream-kasan-gce-selinux-root	2021/03/23 18:24	upstream	84196390	e613994b	.config	log	report	info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-selinux-root	2021/03/23 00:59	upstream	84196390	8092f30d	.config	log	report	info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-smack-root	2021/03/22 23:23	upstream	84196390	8092f30d	.config	log	report	info	general protection fault in scatterwalk_copychunks
ci-upstream-kasan-gce-386	2021/03/22 23:25	upstream	84196390	8092f30d	.config	log	report	info	general protection fault in scatterwalk_copychunks
ci-upstream-net-this-kasan-gce	2021/03/11 22:47	net	47142ed6	429d8a6b	.config	log	report	info	general protection fault in scatterwalk_copychunks