done bcachefs (loop0): accounting_read... done bcachefs (loop0): alloc_read... done bcachefs (loop0): snapshots_read... done bcachefs (loop0): check_allocations... Oops: general protection fault, probably for non-canonical address 0xdffffc0000000004: 0000 [#1] SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000020-0x0000000000000027] CPU: 0 UID: 0 PID: 5833 Comm: syz-executor194 Not tainted 6.14.0-syzkaller-12966-ga2cc6ff5ec8f #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 RIP: 0010:bch2_snapshot_tree_oldest_subvol+0x1d3/0x6a0 fs/bcachefs/snapshot.c:400 Code: e6 e8 f1 71 39 fd 4c 39 e5 0f 86 c9 03 00 00 e8 83 6f 39 fd 49 6b c4 38 49 01 c6 49 83 c6 18 49 83 c6 20 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c6 03 00 00 41 8b 2e 31 ff 89 ee e8 94 RSP: 0018:ffffc90003dc6020 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffff88802412bc00 RDX: 0000000000000000 RSI: 00000000ffeb487f RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8489d72f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffeb487f R13: dffffc0000000000 R14: 0000000000000020 R15: 000000000014b780 FS: 000055556e8aa380(0000) GS:ffff888124fcc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005648fe403f80 CR3: 0000000034f66000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_inum_snap_offset_err_msg_trans+0x374/0x680 fs/bcachefs/error.c:691 bch2_indirect_extent_missing_error+0x411/0x1290 fs/bcachefs/reflink.c:192 gc_trigger_reflink_p_segment fs/bcachefs/reflink.c:392 [inline] __trigger_reflink_p+0x196c/0x1cc0 fs/bcachefs/reflink.c:432 bch2_trigger_reflink_p+0x299/0x380 fs/bcachefs/reflink.c:451 bch2_key_trigger fs/bcachefs/bkey_methods.h:88 [inline] bch2_gc_mark_key+0x6bd/0x1180 fs/bcachefs/btree_gc.c:639 bch2_gc_btree fs/bcachefs/btree_gc.c:677 [inline] bch2_gc_btrees fs/bcachefs/btree_gc.c:740 [inline] bch2_check_allocations+0x1488/0x6ab0 fs/bcachefs/btree_gc.c:1042 bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:226 bch2_run_recovery_passes+0x2ad/0xa90 fs/bcachefs/recovery_passes.c:285 bch2_fs_recovery+0x292a/0x3e20 fs/bcachefs/recovery.c:936 bch2_fs_start+0x2fb/0x610 fs/bcachefs/super.c:1060 bch2_fs_get_tree+0x113e/0x18f0 fs/bcachefs/fs.c:2253 vfs_get_tree+0x90/0x2b0 fs/super.c:1759 do_new_mount+0x2cf/0xb70 fs/namespace.c:3878 do_mount fs/namespace.c:4218 [inline] __do_sys_mount fs/namespace.c:4429 [inline] __se_sys_mount+0x38c/0x400 fs/namespace.c:4406 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6635236e2a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 5e 04 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffcc0dd06d8 EFLAGS: 00000282 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007ffcc0dd06f0 RCX: 00007f6635236e2a RDX: 0000200000000040 RSI: 0000200000000000 RDI: 00007ffcc0dd06f0 RBP: 0000200000000000 R08: 00007ffcc0dd0730 R09: 0000000000005995 R10: 0000000000800001 R11: 0000000000000282 R12: 0000200000000040 R13: 0000000000000004 R14: 0000000000000003 R15: 00007ffcc0dd0730 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_snapshot_tree_oldest_subvol+0x1d3/0x6a0 fs/bcachefs/snapshot.c:400 Code: e6 e8 f1 71 39 fd 4c 39 e5 0f 86 c9 03 00 00 e8 83 6f 39 fd 49 6b c4 38 49 01 c6 49 83 c6 18 49 83 c6 20 4c 89 f0 48 c1 e8 03 <42> 0f b6 04 28 84 c0 0f 85 c6 03 00 00 41 8b 2e 31 ff 89 ee e8 94 RSP: 0018:ffffc90003dc6020 EFLAGS: 00010202 RAX: 0000000000000004 RBX: 0000000000000001 RCX: ffff88802412bc00 RDX: 0000000000000000 RSI: 00000000ffeb487f RDI: 0000000000000001 RBP: 0000000000000001 R08: ffffffff8489d72f R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 00000000ffeb487f R13: dffffc0000000000 R14: 0000000000000020 R15: 000000000014b780 FS: 000055556e8aa380(0000) GS:ffff888124fcc000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005648fe403f80 CR3: 0000000034f66000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: e6 e8 out %al,$0xe8 2: f1 int1 3: 71 39 jno 0x3e 5: fd std 6: 4c 39 e5 cmp %r12,%rbp 9: 0f 86 c9 03 00 00 jbe 0x3d8 f: e8 83 6f 39 fd call 0xfd396f97 14: 49 6b c4 38 imul $0x38,%r12,%rax 18: 49 01 c6 add %rax,%r14 1b: 49 83 c6 18 add $0x18,%r14 1f: 49 83 c6 20 add $0x20,%r14 23: 4c 89 f0 mov %r14,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 28 movzbl (%rax,%r13,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 c6 03 00 00 jne 0x3fd 37: 41 8b 2e mov (%r14),%ebp 3a: 31 ff xor %edi,%edi 3c: 89 ee mov %ebp,%esi 3e: e8 .byte 0xe8 3f: 94 xchg %eax,%esp