[syzbot] [bcachefs?] kernel BUG in bch2_lru_change

[syzbot]

Hello,

syzbot found the following issue on:

HEAD commit:    83814698cf48 Merge tag 'powerpc-6.10-2' of git://git.kerne..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=15376aba980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=47d282ddffae809f
dashboard link: https://syzkaller.appspot.com/bug?extid=df3bf3f088dcaa728857
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40

Unfortunately, I don't have any reproducer for this issue yet.

Downloadable assets:
disk image: https://storage.googleapis.com/syzbot-assets/e7b928e00d7b/disk-83814698.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/318e218a0bda/vmlinux-83814698.xz
kernel image: https://storage.googleapis.com/syzbot-assets/b5b5d49c35f6/bzImage-83814698.xz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+df3bf3f088dcaa728857@xxxxxxxxxxxxxxxxxxxxxxxxx

------------[ cut here ]------------
kernel BUG at fs/bcachefs/lru.h:22!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN PTI
CPU: 1 PID: 7494 Comm: syz-executor.4 Not tainted 6.10.0-rc1-syzkaller-00304-g83814698cf48 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
RIP: 0010:lru_pos fs/bcachefs/lru.h:22 [inline]
RIP: 0010:__bch2_lru_set fs/bcachefs/lru.c:48 [inline]
RIP: 0010:bch2_lru_del fs/bcachefs/lru.c:54 [inline]
RIP: 0010:bch2_lru_change+0x65c/0x680 fs/bcachefs/lru.c:69
Code: 80 e1 07 38 c1 0f 8c 47 fd ff ff be 14 00 00 00 48 8b 7c 24 10 e8 74 f5 c4 fd e9 33 fd ff ff e8 9a ee 49 07 e8 85 7d 62 fd 90 <0f> 0b e8 7d 7d 62 fd 90 0f 0b e8 75 7d 62 fd 90 0f 0b e8 6d 7d 62
RSP: 0018:ffffc90004c5ec20 EFLAGS: 00010293
RAX: ffffffff8433980b RBX: 1ffff9200098bd9a RCX: ffff88801a7e1e00
RDX: 0000000000000000 RSI: 6985a28b8c752100 RDI: 0000ffffffffffff
RBP: ffffc90004c5ed50 R08: ffffffff84339353 R09: ffffffff84011614
R10: 0000000000000003 R11: ffff88801a7e1e00 R12: 0000ffffffffffff
R13: 1ffff9200098bd8c R14: 6985a28b8c752100 R15: ffffa28b8c752100
FS:  0000555590ab6480(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 0000555590acf9b8 CR3: 000000006a46c000 CR4: 00000000003506f0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bch2_trigger_alloc+0x2695/0x3b90 fs/bcachefs/alloc_background.c:797
 bch2_key_trigger fs/bcachefs/bkey_methods.h:88 [inline]
 run_one_trans_trigger fs/bcachefs/btree_trans_commit.c:509 [inline]
 run_btree_triggers+0xbff/0x11d0 fs/bcachefs/btree_trans_commit.c:544
 bch2_trans_commit_run_triggers fs/bcachefs/btree_trans_commit.c:587 [inline]
 __bch2_trans_commit+0x574/0x88e0 fs/bcachefs/btree_trans_commit.c:1022
 bch2_trans_commit fs/bcachefs/btree_update.h:170 [inline]
 bch2_inode_delete_keys+0xae8/0x1440 fs/bcachefs/inode.c:845
 bch2_inode_rm+0x165/0xd40 fs/bcachefs/inode.c:874
 bch2_evict_inode+0x21c/0x3c0 fs/bcachefs/fs.c:1579
 evict+0x2a8/0x630 fs/inode.c:667
 do_unlinkat+0x512/0x830 fs/namei.c:4414
 __do_sys_unlink fs/namei.c:4455 [inline]
 __se_sys_unlink fs/namei.c:4453 [inline]
 __x64_sys_unlink+0x49/0x60 fs/namei.c:4453
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f64ece7c697
Code: 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 b8 57 00 00 00 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffe5f1d8f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f64ece7c697
RDX: 00007ffe5f1d8f60 RSI: 00007ffe5f1d8ff0 RDI: 00007ffe5f1d8ff0
RBP: 00007ffe5f1d8ff0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000100 R11: 0000000000000206 R12: 00007ffe5f1da0e0
R13: 00007f64ecec8336 R14: 000000000003e964 R15: 0000000000000018
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:lru_pos fs/bcachefs/lru.h:22 [inline]
RIP: 0010:__bch2_lru_set fs/bcachefs/lru.c:48 [inline]
RIP: 0010:bch2_lru_del fs/bcachefs/lru.c:54 [inline]
RIP: 0010:bch2_lru_change+0x65c/0x680 fs/bcachefs/lru.c:69
Code: 80 e1 07 38 c1 0f 8c 47 fd ff ff be 14 00 00 00 48 8b 7c 24 10 e8 74 f5 c4 fd e9 33 fd ff ff e8 9a ee 49 07 e8 85 7d 62 fd 90 <0f> 0b e8 7d 7d 62 fd 90 0f 0b e8 75 7d 62 fd 90 0f 0b e8 6d 7d 62
RSP: 0018:ffffc90004c5ec20 EFLAGS: 00010293
RAX: ffffffff8433980b RBX: 1ffff9200098bd9a RCX: ffff88801a7e1e00
RDX: 0000000000000000 RSI: 6985a28b8c752100 RDI: 0000ffffffffffff
RBP: ffffc90004c5ed50 R08: ffffffff84339353 R09: ffffffff84011614
R10: 0000000000000003 R11: ffff88801a7e1e00 R12: 0000ffffffffffff
R13: 1ffff9200098bd8c R14: 6985a28b8c752100 R15: ffffa28b8c752100
FS:  0000555590ab6480(0000) GS:ffff8880b


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