jffs2: warning: (7955) jffs2_sum_write_sumnode: Empty summary info!!!
------------[ cut here ]------------
kernel BUG at fs/jffs2/summary.c:868!
Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI
CPU: 3 UID: 0 PID: 7955 Comm: jffs2_gcd_mtd0 Tainted: G             L      syzkaller #0 PREEMPT(full) 
Tainted: [L]=SOFTLOCKUP
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014
RIP: 0010:jffs2_sum_write_sumnode.cold+0x4e/0x174 fs/jffs2/summary.c:868
Code: 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 2c 01 00 00 8b b3 40 06 00 00 48 c7 c2 c0 92 33 8c 48 c7 c7 c0 8e 33 8c e8 cd 6d f8 ff 90 <0f> 0b e8 05 44 e2 00 65 4c 8b 3d 65 c4 62 13 b8 ff ff 37 00 48 c1
RSP: 0018:ffffc9000d0d76e0 EFLAGS: 00010286
RAX: 0000000000000045 RBX: ffff888030d32580 RCX: 0000000000000000
RDX: 0000000000000045 RSI: ffffffff81ea1339 RDI: fffff52001a1aecd
RBP: ffffc9000d0d7860 R08: 0000000000000007 R09: 0000000000000000
R10: 8000000000000000 R11: 0000000000000001 R12: ffff888037636080
R13: 0000000000000000 R14: 0000000000000f40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880d5e56000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f942061c73c CR3: 000000003c6d1000 CR4: 0000000000352ef0
Call Trace:
 <TASK>
 jffs2_do_reserve_space+0xb94/0xf70 fs/jffs2/nodemgmt.c:392
 jffs2_reserve_space_gc+0x6b/0xf0 fs/jffs2/nodemgmt.c:226
 jffs2_garbage_collect_pristine+0x103/0x870 fs/jffs2/gc.c:613
 jffs2_garbage_collect_live+0x1471/0x36b0 fs/jffs2/gc.c:546
 jffs2_garbage_collect_pass+0xb28/0x1b40 fs/jffs2/gc.c:464
 jffs2_garbage_collect_thread+0x28d/0x690 fs/jffs2/background.c:155
 kthread+0x373/0x450 kernel/kthread.c:436
 ret_from_fork+0x730/0xd60 arch/x86/kernel/process.c:158
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:jffs2_sum_write_sumnode.cold+0x4e/0x174 fs/jffs2/summary.c:868
Code: 0f b6 04 02 84 c0 74 08 3c 03 0f 8e 2c 01 00 00 8b b3 40 06 00 00 48 c7 c2 c0 92 33 8c 48 c7 c7 c0 8e 33 8c e8 cd 6d f8 ff 90 <0f> 0b e8 05 44 e2 00 65 4c 8b 3d 65 c4 62 13 b8 ff ff 37 00 48 c1
RSP: 0018:ffffc9000d0d76e0 EFLAGS: 00010286
RAX: 0000000000000045 RBX: ffff888030d32580 RCX: 0000000000000000
RDX: 0000000000000045 RSI: ffffffff81ea1339 RDI: fffff52001a1aecd
RBP: ffffc9000d0d7860 R08: 0000000000000007 R09: 0000000000000000
R10: 8000000000000000 R11: 0000000000000001 R12: ffff888037636080
R13: 0000000000000000 R14: 0000000000000f40 R15: 0000000000000000
FS:  0000000000000000(0000) GS:ffff8880d5e56000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007f942061c73c CR3: 000000003764c000 CR4: 0000000000352ef0