BTRFS info (device loop4): enabling ssd optimizations
BTRFS info (device loop4): clearing free space tree
BTRFS info (device loop4): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop4): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
==================================================================
BUG: KASAN: null-ptr-deref in instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
BUG: KASAN: null-ptr-deref in atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:577 [inline]
BUG: KASAN: null-ptr-deref in btrfs_root_node+0x103/0x370 fs/btrfs/ctree.c:138
Write of size 4 at addr 0000000000000060 by task syz-executor.4/7068

CPU: 0 PID: 7068 Comm: syz-executor.4 Not tainted 5.15.146-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e3/0x2cb lib/dump_stack.c:106
 __kasan_report mm/kasan/report.c:438 [inline]
 kasan_report+0x161/0x1c0 mm/kasan/report.c:451
 kasan_check_range+0x27e/0x290 mm/kasan/generic.c:189
 instrument_atomic_read_write include/linux/instrumented.h:101 [inline]
 atomic_inc_not_zero include/linux/atomic/atomic-instrumented.h:577 [inline]
 btrfs_root_node+0x103/0x370 fs/btrfs/ctree.c:138
 btrfs_read_lock_root_node+0x7b/0x3b0 fs/btrfs/locking.c:276
 btrfs_search_slot_get_root fs/btrfs/ctree.c:1647 [inline]
 btrfs_search_slot+0x4b2/0x28b0 fs/btrfs/ctree.c:1805
 btrfs_orphan_cleanup+0x211/0xcf0 fs/btrfs/inode.c:3541
 btrfs_cleanup_fs_roots+0x7a7/0xaf0 fs/btrfs/disk-io.c:4293
 btrfs_start_pre_rw_mount+0x1b5/0x680 fs/btrfs/disk-io.c:3090
 open_ctree+0x2d9c/0x34bf fs/btrfs/disk-io.c:3622
 btrfs_fill_super+0x1c7/0x2d0 fs/btrfs/super.c:1387
 btrfs_mount_root+0x803/0x930 fs/btrfs/super.c:1752
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1517
 fc_mount fs/namespace.c:1000 [inline]
 vfs_kern_mount+0xb8/0x150 fs/namespace.c:1030
 btrfs_mount+0x395/0xb40 fs/btrfs/super.c:1812
 legacy_get_tree+0xeb/0x180 fs/fs_context.c:611
 vfs_get_tree+0x88/0x270 fs/super.c:1517
 do_new_mount+0x28b/0xae0 fs/namespace.c:2994
 do_mount fs/namespace.c:3337 [inline]
 __do_sys_mount fs/namespace.c:3545 [inline]
 __se_sys_mount+0x2d5/0x3c0 fs/namespace.c:3522
 do_syscall_x64 arch/x86/entry/common.c:50 [inline]
 do_syscall_64+0x3d/0xb0 arch/x86/entry/common.c:80
 entry_SYSCALL_64_after_hwframe+0x61/0xcb
RIP: 0033:0x7f765e74542a
Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 09 00 00 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 49 89 ca b8 a5 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:00007f765ccc4ee8 EFLAGS: 00000202 ORIG_RAX: 00000000000000a5
RAX: ffffffffffffffda RBX: 00007f765ccc4f80 RCX: 00007f765e74542a
RDX: 00000000200055c0 RSI: 0000000020000080 RDI: 00007f765ccc4f40
RBP: 00000000200055c0 R08: 00007f765ccc4f80 R09: 0000000000000008
R10: 0000000000000008 R11: 0000000000000202 R12: 0000000020000080
R13: 00007f765ccc4f40 R14: 00000000000055ab R15: 0000000020000000
 </TASK>
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