BTRFS info (device loop0): balance: start -d -m BTRFS info (device loop0): relocating block group 6881280 flags data|metadata BTRFS info (device loop0): relocating block group 5242880 flags data|metadata BTRFS info (device loop0): found 14 extents, stage: move data extents Oops: general protection fault, probably for non-canonical address 0xdffffc000000002a: 0000 [#1] SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000150-0x0000000000000157] CPU: 0 UID: 0 PID: 5321 Comm: syz.0.0 Not tainted syzkaller #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2 04/01/2014 RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 c3 cc cc cc cc cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000db5ebc8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffff8bb45e1e RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8bb45e1e RDI: 000000000000002a RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100235ed2f R12: 0000000000000000 R13: 0000000000000150 R14: 0000000000000150 R15: 0000000000000001 FS: 00007f50d7df56c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564e8ad7a168 CR3: 000000001cda7000 CR4: 0000000000352ef0 Call Trace: __kasan_check_byte+0x12/0x40 mm/kasan/common.c:573 kasan_check_byte include/linux/kasan.h:402 [inline] lock_acquire+0x79/0x2e0 kernel/locking/lockdep.c:5842 __raw_spin_lock include/linux/spinlock_api_smp.h:158 [inline] _raw_spin_lock+0x2e/0x40 kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:341 [inline] detach_extent_buffer_folio+0xda/0x910 fs/btrfs/extent_io.c:2940 btrfs_release_extent_buffer_folios+0x68/0x440 fs/btrfs/extent_io.c:3000 release_extent_buffer+0x16b/0x240 fs/btrfs/extent_io.c:3649 free_extent_buffer+0x399/0x3f0 fs/btrfs/extent_io.c:3695 btrfs_del_items+0xb0c/0xd50 fs/btrfs/ctree.c:-1 __btrfs_free_extent+0x1275/0x4570 fs/btrfs/extent-tree.c:3546 run_delayed_tree_ref fs/btrfs/extent-tree.c:1824 [inline] run_one_delayed_ref fs/btrfs/extent-tree.c:1851 [inline] btrfs_run_delayed_refs_for_head fs/btrfs/extent-tree.c:2058 [inline] __btrfs_run_delayed_refs+0x1881/0x4780 fs/btrfs/extent-tree.c:2133 btrfs_run_delayed_refs+0xe6/0x3b0 fs/btrfs/extent-tree.c:2245 btrfs_commit_transaction+0x29a/0x31a0 fs/btrfs/transaction.c:2254 relocate_block_group+0xcf9/0xe90 fs/btrfs/relocation.c:3653 do_nonremap_reloc+0xa8/0x5b0 fs/btrfs/relocation.c:5258 btrfs_relocate_block_group+0x75e/0xbc0 fs/btrfs/relocation.c:5424 btrfs_relocate_chunk+0x115/0x820 fs/btrfs/volumes.c:3590 __btrfs_balance+0x1db0/0x2ae0 fs/btrfs/volumes.c:4501 btrfs_balance+0xafa/0x11f0 fs/btrfs/volumes.c:4888 btrfs_ioctl_balance+0x3d3/0x610 fs/btrfs/ioctl.c:3452 vfs_ioctl fs/ioctl.c:51 [inline] __do_sys_ioctl fs/ioctl.c:597 [inline] __se_sys_ioctl+0xfc/0x170 fs/ioctl.c:583 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x14d/0xf80 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f50db99c819 Code: ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 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 e8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f50d7df4fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000010 RAX: ffffffffffffffda RBX: 00007f50dbc16090 RCX: 00007f50db99c819 RDX: 0000200000000180 RSI: 00000000c4009420 RDI: 0000000000000007 RBP: 00007f50dba32c91 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007f50dbc16128 R14: 00007f50dbc16090 R15: 00007fff6c889198 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:kasan_byte_accessible+0x12/0x30 mm/kasan/generic.c:210 Code: 79 ff ff ff 0f 1f 40 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 0f 1f 40 d6 48 c1 ef 03 48 b8 00 00 00 00 00 fc ff df <0f> b6 04 07 3c 08 0f 92 c0 c3 cc cc cc cc cc 66 66 66 66 66 66 2e RSP: 0018:ffffc9000db5ebc8 EFLAGS: 00010202 RAX: dffffc0000000000 RBX: ffffffff8bb45e1e RCX: 0000000080000002 RDX: 0000000000000000 RSI: ffffffff8bb45e1e RDI: 000000000000002a RBP: 0000000000000000 R08: 0000000000000001 R09: 0000000000000000 R10: dffffc0000000000 R11: ffffed100235ed2f R12: 0000000000000000 R13: 0000000000000150 R14: 0000000000000150 R15: 0000000000000001 FS: 00007f50d7df56c0(0000) GS:ffff88808ca49000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000564e8ad7a168 CR3: 000000001cda7000 CR4: 0000000000352ef0 ---------------- Code disassembly (best guess), 4 bytes skipped: 0: 0f 1f 40 00 nopl 0x0(%rax) 4: 90 nop 5: 90 nop 6: 90 nop 7: 90 nop 8: 90 nop 9: 90 nop a: 90 nop b: 90 nop c: 90 nop d: 90 nop e: 90 nop f: 90 nop 10: 90 nop 11: 90 nop 12: 90 nop 13: 90 nop 14: 0f 1f 40 d6 nopl -0x2a(%rax) 18: 48 c1 ef 03 shr $0x3,%rdi 1c: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 23: fc ff df * 26: 0f b6 04 07 movzbl (%rdi,%rax,1),%eax <-- trapping instruction 2a: 3c 08 cmp $0x8,%al 2c: 0f 92 c0 setb %al 2f: c3 ret 30: cc int3 31: cc int3 32: cc int3 33: cc int3 34: cc int3 35: 66 data16 36: 66 data16 37: 66 data16 38: 66 data16 39: 66 data16 3a: 66 data16 3b: 2e cs