bcachefs (loop5): accounting_read... done
bcachefs (loop5): alloc_read... done
bcachefs (loop5): stripes_read... done
bcachefs (loop5): snapshots_read... done
bcachefs (loop5): done starting filesystem
=====================================================
BUG: KMSAN: uninit-value in bch2_write_inode+0x9fa/0xf80 fs/bcachefs/fs.c:109
 bch2_write_inode+0x9fa/0xf80 fs/bcachefs/fs.c:109
 bch2_ioc_setflags fs/bcachefs/fs-ioctl.c:104 [inline]
 bch2_fs_file_ioctl+0x25ce/0x49f0 fs/bcachefs/fs-ioctl.c:542
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:906 [inline]
 __se_sys_ioctl+0x246/0x440 fs/ioctl.c:892
 __x64_sys_ioctl+0x96/0xe0 fs/ioctl.c:892
 x64_sys_call+0x19f0/0x3c30 arch/x86/include/generated/asm/syscalls_64.h:17
 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

Local variable io_opts.i117 created at:
 bch2_inode_rebalance_opts_get fs/bcachefs/inode.h:291 [inline]
 bch2_write_inode+0x696/0xf80 fs/bcachefs/fs.c:107
 bch2_ioc_setflags fs/bcachefs/fs-ioctl.c:104 [inline]
 bch2_fs_file_ioctl+0x25ce/0x49f0 fs/bcachefs/fs-ioctl.c:542

CPU: 0 UID: 0 PID: 27078 Comm: syz.5.5398 Tainted: G        W          6.13.0-syzkaller-10003-ga86bf2283d2c #0
Tainted: [W]=WARN
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024
=====================================================