jffs2: warning: (10801) jffs2_sum_write_sumnode: Empty summary info!!! ------------[ cut here ]------------ ------------[ cut here ]------------ kernel BUG at fs/jffs2/summary.c:868! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 10801 Comm: syz.9.661 Tainted: G L syzkaller #0 PREEMPT(full) Tainted: [L]=SOFTLOCKUP Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/05/2026 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 00 76 33 8c 48 c7 c7 00 72 33 8c e8 cd 73 f8 ff 90 <0f> 0b e8 45 f9 e1 00 65 4c 8b 3d 65 1a 62 13 b8 ff ff 37 00 48 c1 RSP: 0018:ffffc90003a56d90 EFLAGS: 00010282 RAX: 0000000000000046 RBX: ffff8880375f8000 RCX: 0000000000000000 RDX: 0000000000000046 RSI: ffffffff81e9c5d9 RDI: fffff5200074ada3 RBP: ffffc90003a56f10 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: ffff88807e062a00 R13: 0000000000000000 R14: 0000000000000f40 R15: 0000000000000000 FS: 00007f34bbf8d6c0(0000) GS:ffff888123b61000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557616249078 CR3: 0000000074bae000 CR4: 0000000000350ef0 Call Trace: 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_reserve_space+0x489/0xbb0 fs/jffs2/nodemgmt.c:171 jffs2_write_inode_range+0x275/0xb80 fs/jffs2/write.c:362 jffs2_write_end+0x72c/0xea0 fs/jffs2/file.c:299 generic_perform_write+0x513/0xa40 mm/filemap.c:4395 __generic_file_write_iter+0x1f7/0x240 mm/filemap.c:4491 generic_file_write_iter+0xe1/0x390 mm/filemap.c:4517 iter_file_splice_write+0x830/0x10b0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x192/0x690 fs/splice.c:1159 splice_direct_to_actor+0x345/0xa30 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x174/0x240 fs/splice.c:1228 do_sendfile+0xadc/0xe20 fs/read_write.c:1371 __do_sys_sendfile64 fs/read_write.c:1432 [inline] __se_sys_sendfile64 fs/read_write.c:1418 [inline] __x64_sys_sendfile64+0x1d8/0x220 fs/read_write.c:1418 do_syscall_x64 arch/x86/entry/syscall_64.c:61 [inline] do_syscall_64+0x123/0x790 arch/x86/entry/syscall_64.c:84 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f34bb19e159 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f34bbf8d028 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007f34bb426090 RCX: 00007f34bb19e159 RDX: 0000000000000000 RSI: 0000000000000008 RDI: 0000000000000009 RBP: 00007f34bb235024 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000020000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f34bb426128 R14: 00007f34bb426090 R15: 00007ffc4299d258 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 00 76 33 8c 48 c7 c7 00 72 33 8c e8 cd 73 f8 ff 90 <0f> 0b e8 45 f9 e1 00 65 4c 8b 3d 65 1a 62 13 b8 ff ff 37 00 48 c1 RSP: 0018:ffffc90003a56d90 EFLAGS: 00010282 RAX: 0000000000000046 RBX: ffff8880375f8000 RCX: 0000000000000000 RDX: 0000000000000046 RSI: ffffffff81e9c5d9 RDI: fffff5200074ada3 RBP: ffffc90003a56f10 R08: 0000000000000007 R09: 0000000000000000 R10: 8000000000000000 R11: 0000000000000001 R12: ffff88807e062a00 R13: 0000000000000000 R14: 0000000000000f40 R15: 0000000000000000 FS: 00007f34bbf8d6c0(0000) GS:ffff888123c61000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe398fd0000 CR3: 0000000074bae000 CR4: 0000000000350ef0