[syzbot] [bcachefs?] kernel BUG in bch2_bkey_cmp_packed

[syzbot <syzbot+8a0109511de9d4b61217@syzkaller.appspotmail.com>]

Hello,

syzbot found the following issue on:

HEAD commit:    c2ee9f594da8 KVM: selftests: Fix build on on non-x86 archi..
git tree:       upstream
console output: https://syzkaller.appspot.com/x/log.txt?x=12cb50a7980000
kernel config:  https://syzkaller.appspot.com/x/.config?x=fc6f8ce8c5369043
dashboard link: https://syzkaller.appspot.com/bug?extid=8a0109511de9d4b61217
compiler:       Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40
syz repro:      https://syzkaller.appspot.com/x/repro.syz?x=14b54a5f980000
C reproducer:   https://syzkaller.appspot.com/x/repro.c?x=148c0c30580000

Downloadable assets:
disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7feb34a89c2a/non_bootable_disk-c2ee9f59.raw.xz
vmlinux: https://storage.googleapis.com/syzbot-assets/8a3541902b13/vmlinux-c2ee9f59.xz
kernel image: https://storage.googleapis.com/syzbot-assets/a00efacc2604/bzImage-c2ee9f59.xz
mounted in repro: https://storage.googleapis.com/syzbot-assets/daabab57e77d/mount_0.gz

IMPORTANT: if you fix the issue, please add the following tag to the commit:
Reported-by: syzbot+8a0109511de9d4b61217@syzkaller.appspotmail.com

bcachefs (loop0): going read-write
bcachefs (loop0): Fixed errors, running fsck a second time to verify fs is clean
bcachefs (loop0): done starting filesystem
------------[ cut here ]------------
kernel BUG at fs/bcachefs/bkey_cmp.h:104!
Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI
CPU: 0 UID: 0 PID: 5098 Comm: syz-executor272 Not tainted 6.12.0-rc4-syzkaller-00047-gc2ee9f594da8 #0
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014
RIP: 0010:__bch2_bkey_cmp_packed_format_checked_inlined fs/bcachefs/bkey_cmp.h:103 [inline]
RIP: 0010:bch2_bkey_cmp_packed_inlined fs/bcachefs/bkey_cmp.h:116 [inline]
RIP: 0010:bch2_bkey_cmp_packed+0xc9c/0xcb0 fs/bcachefs/bkey.c:1037
Code: 8a 0c b5 07 e8 85 7d 83 fd 90 0f 0b e8 7d 7d 83 fd 90 0f 0b e8 75 7d 83 fd 90 0f 0b e8 6d 7d 83 fd 90 0f 0b e8 65 7d 83 fd 90 <0f> 0b e8 5d 7d 83 fd 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000af44f00 EFLAGS: 00010293
RAX: ffffffff84115a7b RBX: 1ffff920015e89e8 RCX: ffff88801f132440
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000001
RBP: ffffc9000af45090 R08: ffffffff8411531e R09: 0000000000000000
R10: ffffc9000af44fa0 R11: fffff520015e89f6 R12: 0000000000000001
R13: ffffffffffffffff R14: 0000000000000000 R15: ffffc9000af44fa0
FS:  00005555623d6380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 000055c295070510 CR3: 000000003d786000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400
Call Trace:
 <TASK>
 bkey_packed_successor fs/bcachefs/bkey.c:428 [inline]
 bch2_bkey_pack_pos_lossy+0xc94/0x1990 fs/bcachefs/bkey.c:537
 bch2_btree_node_iter_init+0x894/0x4280 fs/bcachefs/bset.c:1313
 __btree_path_level_init fs/bcachefs/btree_iter.c:615 [inline]
 bch2_btree_path_level_init+0x4d2/0x9f0 fs/bcachefs/btree_iter.c:635
 btree_path_lock_root fs/bcachefs/btree_iter.c:769 [inline]
 bch2_btree_path_traverse_one+0x10de/0x2940 fs/bcachefs/btree_iter.c:1170
 bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline]
 bch2_btree_iter_peek_slot+0x84f/0x2550 fs/bcachefs/btree_iter.c:2616
 bchfs_read+0x988/0x2be0 fs/bcachefs/fs-io-buffered.c:182
 bch2_readahead+0x1154/0x1930 fs/bcachefs/fs-io-buffered.c:277
 read_pages+0x17e/0x840 mm/readahead.c:160
 page_cache_ra_order+0xb00/0xdb0 mm/readahead.c:508
 page_cache_sync_readahead include/linux/pagemap.h:1394 [inline]
 filemap_get_pages+0x621/0x2540 mm/filemap.c:2547
 filemap_read+0x454/0xf90 mm/filemap.c:2645
 bch2_read_iter+0x1122/0x1470 fs/bcachefs/fs-io-direct.c:208
 __kernel_read+0x513/0x9d0 fs/read_write.c:527
 integrity_kernel_read+0xb0/0x100 security/integrity/iint.c:28
 ima_calc_file_hash_tfm security/integrity/ima/ima_crypto.c:480 [inline]
 ima_calc_file_shash security/integrity/ima/ima_crypto.c:511 [inline]
 ima_calc_file_hash+0xae6/0x1b30 security/integrity/ima/ima_crypto.c:568
 ima_collect_measurement+0x520/0xb10 security/integrity/ima/ima_api.c:293
 process_measurement+0x1351/0x1fb0 security/integrity/ima/ima_main.c:372
 ima_file_check+0xf2/0x170 security/integrity/ima/ima_main.c:572
 security_file_post_open+0xb9/0x280 security/security.c:3129
 do_open fs/namei.c:3776 [inline]
 path_openat+0x2ccd/0x3590 fs/namei.c:3933
 do_filp_open+0x235/0x490 fs/namei.c:3960
 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415
 do_sys_open fs/open.c:1430 [inline]
 __do_sys_openat fs/open.c:1446 [inline]
 __se_sys_openat fs/open.c:1441 [inline]
 __x64_sys_openat+0x247/0x2a0 fs/open.c:1441
 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: 0033:0x7f103ee0b9b9
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffee6340028 EFLAGS: 00000246 ORIG_RAX: 0000000000000101
RAX: ffffffffffffffda RBX: 00007ffee6340208 RCX: 00007f103ee0b9b9
RDX: 0000000000000042 RSI: 0000000020000100 RDI: 00000000ffffff9c
RBP: 00007f103ee84610 R08: 0000000000005959 R09: 0000000000000000
R10: 00000000000001ff R11: 0000000000000246 R12: 0000000000000001
R13: 00007ffee63401f8 R14: 0000000000000001 R15: 0000000000000001
 </TASK>
Modules linked in:
---[ end trace 0000000000000000 ]---
RIP: 0010:__bch2_bkey_cmp_packed_format_checked_inlined fs/bcachefs/bkey_cmp.h:103 [inline]
RIP: 0010:bch2_bkey_cmp_packed_inlined fs/bcachefs/bkey_cmp.h:116 [inline]
RIP: 0010:bch2_bkey_cmp_packed+0xc9c/0xcb0 fs/bcachefs/bkey.c:1037
Code: 8a 0c b5 07 e8 85 7d 83 fd 90 0f 0b e8 7d 7d 83 fd 90 0f 0b e8 75 7d 83 fd 90 0f 0b e8 6d 7d 83 fd 90 0f 0b e8 65 7d 83 fd 90 <0f> 0b e8 5d 7d 83 fd 90 0f 0b 66 2e 0f 1f 84 00 00 00 00 00 90 90
RSP: 0018:ffffc9000af44f00 EFLAGS: 00010293
RAX: ffffffff84115a7b RBX: 1ffff920015e89e8 RCX: ffff88801f132440
RDX: 0000000000000000 RSI: 00000000ffffffff RDI: 0000000000000001
RBP: ffffc9000af45090 R08: ffffffff8411531e R09: 0000000000000000
R10: ffffc9000af44fa0 R11: fffff520015e89f6 R12: 0000000000000001
R13: ffffffffffffffff R14: 0000000000000000 R15: ffffc9000af44fa0
FS:  00005555623d6380(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000
CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
CR2: 00007ffd9c51ad88 CR3: 000000003d786000 CR4: 0000000000352ef0
DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400


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