BUG: unable to handle kernel paging request in diFree

BUG: unable to handle kernel paging request in diFree
Status: upstream: reported C repro on 2020/09/23 16:53
Reported-by: syzbot+d17404b64177c0bd1ab7@syzkaller.appspotmail.com
First crash: 156d, last: 6d23h

similar bugs (2):
Kernel	Title	Repro	Cause bisect	Fix bisect	Count	Last	Reported	Patched	Status
linux-4.19	BUG: unable to handle kernel paging request in diFree	C			7	1d19h	150d	0/1	upstream: reported C repro on 2020/09/29 04:03
upstream	BUG: unable to handle kernel paging request in diFree	C	done		8	55d	151d	0/21	upstream: reported C repro on 2020/09/28 07:48

Sample crash report:

audit: type=1400 audit(1601677740.552:8): avc:  denied  { execmem } for  pid=6359 comm="syz-executor159" scontext=system_u:system_r:kernel_t:s0 tcontext=system_u:system_r:kernel_t:s0 tclass=process permissive=1
ERROR: (device loop0): xtSearch: XT_GETPAGE: xtree page corrupt
BUG: unable to handle kernel paging request at ffffffffffffff80
IP: diFree+0x12e/0x2830 fs/jfs/jfs_imap.c:872
PGD 7c6d067 P4D 7c6d067 PUD 7c6f067 PMD 0 
Oops: 0000 [#1] PREEMPT SMP KASAN
Modules linked in:
CPU: 1 PID: 6359 Comm: syz-executor159 Not tainted 4.14.198-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
task: ffff8880971e8600 task.stack: ffff888097758000
RIP: 0010:diFree+0x12e/0x2830 fs/jfs/jfs_imap.c:872
RSP: 0018:ffff88809775f9a8 EFLAGS: 00010246
RAX: 0000000000000000 RBX: ffff8880905a2ac0 RCX: ffff88808269e474
RDX: 1ffffffffffffff0 RSI: 0000000000000000 RDI: ffffffffffffff80
RBP: ffff88808269e468 R08: ffffffff8a09ad30 R09: 0000000000000001
R10: 0000000000000000 R11: ffff8880971e8600 R12: ffff88808269e468
R13: ffff88808269e490 R14: ffffffff86d12980 R15: ffff88808269e620
FS:  00000000012ab880(0000) GS:ffff8880aeb00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: ffffffffffffff80 CR3: 0000000088dfb000 CR4: 00000000001406e0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 jfs_evict_inode+0xee/0x130 fs/jfs/inode.c:164
 evict+0x2c8/0x700 fs/inode.c:555
 iput_final fs/inode.c:1524 [inline]
 iput+0x458/0x7e0 fs/inode.c:1551
 diFreeSpecial fs/jfs/jfs_imap.c:569 [inline]
 diFreeSpecial+0x63/0x80 fs/jfs/jfs_imap.c:561
 jfs_mount+0x20a/0x380 fs/jfs/jfs_mount.c:222
 jfs_fill_super+0x52a/0xab0 fs/jfs/super.c:589
 mount_bdev+0x2b3/0x360 fs/super.c:1134
 mount_fs+0x92/0x2a0 fs/super.c:1237
 vfs_kern_mount.part.0+0x5b/0x470 fs/namespace.c:1046
 vfs_kern_mount fs/namespace.c:1036 [inline]
 do_new_mount fs/namespace.c:2549 [inline]
 do_mount+0xe53/0x2a00 fs/namespace.c:2879
 SYSC_mount fs/namespace.c:3095 [inline]
 SyS_mount+0xa8/0x120 fs/namespace.c:3072
 do_syscall_64+0x1d5/0x640 arch/x86/entry/common.c:292
 entry_SYSCALL_64_after_hwframe+0x46/0xbb
RIP: 0033:0x446dea
RSP: 002b:00007ffc369d8a88 EFLAGS: 00000283 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007ffc369d8ad0 RCX: 0000000000446dea
RDX: 0000000020000000 RSI: 0000000020000100 RDI: 00007ffc369d8a90
RBP: 00007ffc369d8a90 R08: 00007ffc369d8ad0 R09: 6f6f6c2f7665642f
R10: 0000000000008001 R11: 0000000000000283 R12: 0000000000000004
R13: 0000000000000003 R14: 0000000000000003 R15: 0000000000000006
Code: 43 28 48 8d 78 80 48 89 44 24 18 48 b8 00 00 00 00 00 fc ff df 48 89 fa 48 c1 ea 03 80 3c 02 00 0f 85 5b 20 00 00 48 8b 44 24 18 <48> 8b 68 80 48 8b 44 24 20 4c 8d 6d 04 48 c1 e8 0c 4c 89 ea 48 
RIP: diFree+0x12e/0x2830 fs/jfs/jfs_imap.c:872 RSP: ffff88809775f9a8
CR2: ffffffffffffff80
---[ end trace 985aa5335c4034fb ]---

Fix bisection attempts:
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro
ci2-linux-4-14	2021/02/19 19:44	linux-4.14.y	29c52025	062c9832	.config	log	report	syz	C
ci2-linux-4-14	2020/12/31 23:42	linux-4.14.y	17529385	062c9832	.config	log	report	syz	C
ci2-linux-4-14	2020/12/01 23:19	linux-4.14.y	87335852	062c9832	.config	log	report	syz	C
ci2-linux-4-14	2020/11/01 22:54	linux-4.14.y	2b791501	062c9832	.config	log	report	syz	C

Crashes (4):
Manager	Time	Kernel	Commit	Syzkaller	Config	Log	Report	Syz repro	C repro	VM info
ci2-linux-4-14	2020/10/02 22:30	linux-4.14.y	cbfa1702	062c9832	.config	log	report	syz	C
ci2-linux-4-14	2020/10/01 23:47	linux-4.14.y	cbfa1702	9602ddf4	.config	log	report	syz	C
ci2-linux-4-14	2020/09/23 17:06	linux-4.14.y	cbfa1702	287cd75a	.config	log	report	syz	C
ci2-linux-4-14	2020/09/23 16:52	linux-4.14.y	cbfa1702	287cd75a	.config	log	report			info