=====================================================
BUG: KMSAN: uninit-value in bch2_backpointer_validate+0x291/0x490 fs/bcachefs/backpointers.c:23
 bch2_backpointer_validate+0x291/0x490 fs/bcachefs/backpointers.c:23
 bch2_bkey_val_validate+0x357/0x530 fs/bcachefs/bkey_methods.c:143
 btree_node_bkey_val_validate fs/bcachefs/btree_io.c:838 [inline]
 bset_key_validate fs/bcachefs/btree_io.c:859 [inline]
 validate_bset_keys+0x20e3/0x2350 fs/bcachefs/btree_io.c:942
 validate_bset_for_write+0x2b3/0x410 fs/bcachefs/btree_io.c:1987
 __bch2_btree_node_write+0x4827/0x6870 fs/bcachefs/btree_io.c:2180
 bch2_btree_node_write_trans+0xd7/0x890 fs/bcachefs/btree_io.c:2357
 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline]
 __btree_node_flush+0x5e6/0x660 fs/bcachefs/btree_trans_commit.c:252
 bch2_btree_node_flush1+0x38/0x60 fs/bcachefs/btree_trans_commit.c:266
 journal_flush_pins+0x1335/0x1f90 fs/bcachefs/journal_reclaim.c:589
 __bch2_journal_reclaim+0xda8/0x1670 fs/bcachefs/journal_reclaim.c:722
 bch2_journal_reclaim_thread+0x17f/0x750 fs/bcachefs/journal_reclaim.c:764
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was stored to memory at:
 memcpy_u64s_small fs/bcachefs/util.h:416 [inline]
 bkey_p_copy fs/bcachefs/bkey.h:40 [inline]
 bch2_sort_keys_keep_unwritten_whiteouts+0x10e3/0x1840 fs/bcachefs/bkey_sort.c:187
 __bch2_btree_node_write+0x3b3f/0x6870 fs/bcachefs/btree_io.c:2140
 bch2_btree_node_write_trans+0xd7/0x890 fs/bcachefs/btree_io.c:2357
 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline]
 __btree_node_flush+0x5e6/0x660 fs/bcachefs/btree_trans_commit.c:252
 bch2_btree_node_flush1+0x38/0x60 fs/bcachefs/btree_trans_commit.c:266
 journal_flush_pins+0x1335/0x1f90 fs/bcachefs/journal_reclaim.c:589
 __bch2_journal_reclaim+0xda8/0x1670 fs/bcachefs/journal_reclaim.c:722
 bch2_journal_reclaim_thread+0x17f/0x750 fs/bcachefs/journal_reclaim.c:764
 kthread+0x6b9/0xef0 kernel/kthread.c:464
 ret_from_fork+0x6d/0x90 arch/x86/kernel/process.c:148
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Uninit was created at:
 ___kmalloc_large_node+0x22c/0x370 mm/slub.c:4249
 __kmalloc_large_node_noprof+0x3f/0x1e0 mm/slub.c:4266
 __do_kmalloc_node mm/slub.c:4282 [inline]
 __kmalloc_node_noprof+0xc96/0x1250 mm/slub.c:4300
 __kvmalloc_node_noprof+0xc0/0x2d0 mm/util.c:662
 btree_bounce_alloc fs/bcachefs/btree_io.c:123 [inline]
 btree_node_sort+0x78a/0x1d30 fs/bcachefs/btree_io.c:322
 bch2_btree_post_write_cleanup+0x1b0/0xf80 fs/bcachefs/btree_io.c:2293
 bch2_btree_node_write_trans+0x27f/0x890 fs/bcachefs/btree_io.c:2362
 btree_node_write_if_need fs/bcachefs/btree_io.h:153 [inline]
 __btree_node_flush+0x5e6/0x660 fs/bcachefs/btree_trans_commit.c:252
 bch2_btree_node_flush0+0x35/0x60 fs/bcachefs/btree_trans_commit.c:261
 journal_flush_pins+0x1335/0x1f90 fs/bcachefs/journal_reclaim.c:589
 journal_flush_pins_or_still_flushing fs/bcachefs/journal_reclaim.c:861 [inline]
 journal_flush_done+0x157/0xe40 fs/bcachefs/journal_reclaim.c:879
 bch2_journal_flush_pins+0x2a9/0x3b0 fs/bcachefs/journal_reclaim.c:911
 bch2_journal_flush_all_pins fs/bcachefs/journal_reclaim.h:76 [inline]
 bch2_journal_replay+0x4a22/0x4e20 fs/bcachefs/recovery.c:442
 bch2_run_recovery_pass fs/bcachefs/recovery_passes.c:226 [inline]
 bch2_run_recovery_passes+0x5a2/0x1160 fs/bcachefs/recovery_passes.c:291
 bch2_fs_recovery+0x489c/0x6230 fs/bcachefs/recovery.c:936
 bch2_fs_start+0x7ca/0xc20 fs/bcachefs/super.c:1041
 bch2_fs_get_tree+0x1564/0x24e0 fs/bcachefs/fs.c:2203
 vfs_get_tree+0xb1/0x5a0 fs/super.c:1814
 do_new_mount+0x71f/0x15e0 fs/namespace.c:3560
 path_mount+0x742/0x1f10 fs/namespace.c:3887
 do_mount fs/namespace.c:3900 [inline]
 __do_sys_mount fs/namespace.c:4111 [inline]
 __se_sys_mount+0x71f/0x800 fs/namespace.c:4088
 __x64_sys_mount+0xe4/0x150 fs/namespace.c:4088
 x64_sys_call+0x39bf/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:166
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xcd/0x1e0 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

CPU: 1 UID: 0 PID: 12524 Comm: bch-reclaim/loo Tainted: G        W          6.14.0-rc3-syzkaller-00137-g27eddbf34490 #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
=====================================================