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BUG: unable to handle kernel paging request in scatterwalk_copychunks

Status: auto-obsoleted due to no activity on 2023/08/23 09:08
Reported-by: syzbot+734a8ea53c5741ddfb42@syzkaller.appspotmail.com
First crash: 842d, last: 805d
▶ ▼ Similar bugs (12)
Kernel Title Rank 🛈 Repro Cause bisect Fix bisect Count Last Reported Patched Status
linux-6.1 BUG: unable to handle kernel paging request in scatterwalk_copychunks 8 1 753d 753d 0/3 auto-obsoleted due to no activity on 2023/09/25 13:18
upstream general protection fault in scatterwalk_copychunks (4) net crypto 19 C done done 1341 565d 1576d 25/29 fixed on 2023/12/22 15:08
linux-4.14 KASAN: use-after-free Read in scatterwalk_copychunks 19 C inconclusive 4 1617d 2271d 0/1 upstream: reported C repro on 2019/04/21 07:18
linux-4.19 KASAN: use-after-free Read in scatterwalk_copychunks 19 C error 17 891d 2106d 0/1 upstream: reported C repro on 2019/10/03 04:34
linux-4.14 KASAN: slab-out-of-bounds Read in scatterwalk_copychunks 17 C inconclusive 6 1624d 2128d 0/1 upstream: reported C repro on 2019/09/11 08:57
linux-4.14 general protection fault in scatterwalk_copychunks 2 C error 204 879d 2271d 0/1 upstream: reported C repro on 2019/04/21 07:15
upstream KASAN: use-after-free Read in scatterwalk_copychunks bcachefs 19 C done done 67 102d 431d 0/29 auto-obsoleted due to no activity on 2025/06/22 13:02
linux-4.19 general protection fault in scatterwalk_copychunks 2 C error 152 880d 2211d 0/1 upstream: reported C repro on 2019/06/20 18:59
upstream general protection fault in scatterwalk_copychunks (5) crypto 2 C done 2920 554d 561d 25/29 fixed on 2024/01/30 15:47
upstream general protection fault in scatterwalk_copychunks (3) crypto 2 C 95 2451d 2577d 0/29 closed as invalid on 2019/06/10 23:08
upstream general protection fault in scatterwalk_copychunks (2) crypto 2 C 141 2743d 2769d 3/29 fixed on 2018/01/11 01:23
upstream general protection fault in scatterwalk_copychunks crypto 2 C 414 2771d 2780d 3/29 fixed on 2017/12/08 02:32

Sample crash report:
Unable to handle kernel paging request at virtual address dfff800000000001
Mem abort info:
  ESR = 0x0000000096000006
  EC = 0x25: DABT (current EL), IL = 32 bits
  SET = 0, FnV = 0
  EA = 0, S1PTW = 0
  FSC = 0x06: level 2 translation fault
Data abort info:
  ISV = 0, ISS = 0x00000006
  CM = 0, WnR = 0
[dfff800000000001] address between user and kernel address ranges
Internal error: Oops: 96000006 [#1] PREEMPT SMP
Modules linked in:
CPU: 0 PID: 1600 Comm: kworker/u4:5 Not tainted 5.15.109-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: pencrypt_parallel padata_parallel_worker
pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--)
pc : scatterwalk_start include/crypto/scatterwalk.h:68 [inline]
pc : scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline]
pc : scatterwalk_copychunks+0x3a8/0x558 crypto/scatterwalk.c:50
lr : scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline]
lr : scatterwalk_copychunks+0x384/0x558 crypto/scatterwalk.c:50
sp : ffff800020d57560
x29: ffff800020d575a0 x28: 0000000000000000 x27: 0000000000000000
x26: 1ffff000041aaf28 x25: 0000000000000000 x24: 0000000000000008
x23: ffff800020d57948 x22: 1ffff000041aaf29 x21: ffff800020d57940
x20: 0000000000000010 x19: dfff800000000000 x18: 1fffe000368ffd8e
x17: ffff80000816e1c4 x16: ffff80000824cb18 x15: ffff80000a68395c
x14: ffff80000a681f94 x13: ffffffffffffffff x12: 0000000000000000
x11: ff8080000a936774 x10: 0000000000000000 x9 : ffff80000a936774
x8 : 0000000000000001 x7 : 0000000000000000 x6 : ffff8000088c22e0
x5 : ffff0000d78a1500 x4 : ffff000000000000 x3 : ffff80000a67e274
x2 : 0000000000000000 x1 : 0000000000000002 x0 : 0000000000000000
Call trace:
 scatterwalk_start include/crypto/scatterwalk.h:68 [inline]
 scatterwalk_pagedone include/crypto/scatterwalk.h:88 [inline]
 scatterwalk_copychunks+0x3a8/0x558 crypto/scatterwalk.c:50
 skcipher_next_slow+0x2e8/0x3c4 crypto/skcipher.c:278
 skcipher_walk_next+0x544/0x9d8 crypto/skcipher.c:363
 skcipher_walk_first crypto/skcipher.c:446 [inline]
 skcipher_walk_aead_common+0x6f8/0xd08 crypto/skcipher.c:539
 skcipher_walk_aead_encrypt+0x78/0xbc crypto/skcipher.c:552
 ccm_encrypt+0x334/0xab8 arch/arm64/crypto/aes-ce-ccm-glue.c:242
 crypto_aead_encrypt+0xb4/0xe0 crypto/aead.c:94
 pcrypt_aead_enc+0x20/0x90 crypto/pcrypt.c:83
 padata_parallel_worker+0x68/0x1bc kernel/padata.c:144
 process_one_work+0x790/0x11b8 kernel/workqueue.c:2306
 worker_thread+0x910/0x1034 kernel/workqueue.c:2453
 kthread+0x37c/0x45c kernel/kthread.c:319
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870
Code: 97891a33 91002338 f90002b9 d343ff08 (38f36908) 
---[ end trace 1fd873f913a78ad3 ]---
----------------
Code disassembly (best guess):
   0:	97891a33 	bl	0xfffffffffe2468cc
   4:	91002338 	add	x24, x25, #0x8
   8:	f90002b9 	str	x25, [x21]
   c:	d343ff08 	lsr	x8, x24, #3
* 10:	38f36908 	ldrsb	w8, [x8, x19] <-- trapping instruction

Crashes (3):
Time Kernel Commit Syzkaller Config Log Report Syz repro C repro VM info Assets (help?) Manager Title
2023/04/26 13:39 linux-5.15.y f48aeeaaa64c 8d843721 .config console log report info ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in scatterwalk_copychunks
2023/03/20 18:36 linux-5.15.y 8020ae3c051d 7939252e .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan-arm64 BUG: unable to handle kernel paging request in scatterwalk_copychunks
2023/04/13 23:30 linux-5.15.y 4fdad925aa1a 3cfcaa1b .config console log report info [disk image] [vmlinux] [kernel image] ci2-linux-5-15-kasan general protection fault in scatterwalk_copychunks
* Struck through repros no longer work on HEAD.