xt_CHECKSUM: CHECKSUM should be avoided. If really needed, restrict with "-p udp" and only use in OUTPUT x_tables: ip6_tables: TCPMSS target: only valid for protocol 6 loop0: detected capacity change from 0 to 32768 bcachefs (loop0): starting version 1.7: mi_btree_bitmap opts=metadata_checksum=none,data_checksum=none,compression=lz4,usrquota,nojournal_transaction_names bcachefs (loop0): recovering from clean shutdown, journal seq 10 bcachefs (loop0): Version upgrade required: Version upgrade from 0.19: freespace to 1.7: mi_btree_bitmap incomplete Doing incompatible version upgrade from 0.19: freespace to 1.12: rebalance_work_acct_fix running recovery passes: check_allocations,check_alloc_info,check_lrus,check_btree_backpointers,check_backpointers_to_extents,check_extents_to_backpointers,check_alloc_to_lru_refs,bucket_gens_init,check_snapshot_trees,check_snapshots,check_subvols,check_subvol_children,delete_dead_snapshots,check_inodes,check_extents,check_indirect_extents,check_dirents,check_xattrs,check_root,check_subvolume_structure,check_directory_structure,check_nlinks,delete_dead_inodes,set_fs_needs_rebalance bcachefs (loop0): accounting_read... done bcachefs (loop0): alloc_read... Oops: general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 0 UID: 0 PID: 5126 Comm: syz.0.0 Not tainted 6.11.0-syzkaller-08481-g88264981f208 #0 Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 RIP: 0010:bch2_alloc_read+0x17d9/0x24f0 fs/bcachefs/alloc_background.c:625 Code: 0f b6 04 10 84 c0 4c 8d a4 24 b0 02 00 00 49 89 d7 0f 85 78 04 00 00 48 8b 33 48 8b 3c 24 e8 5e 14 00 00 48 89 c3 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 74 04 00 00 0f b6 44 24 30 88 03 48 8b RSP: 0018:ffffc90002caf0e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8901365a083c RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000008100000014 RBP: ffffc90002caf4c8 R08: ffffffff8409ef0e R09: 0000000000000000 R10: ffffc90002caf450 R11: fffff52000595e8c R12: ffffc90002caf390 R13: 000000000000001c R14: ffffc90002caf200 R15: dffffc0000000000 FS: 00007faa7360f6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fea88ed5130 CR3: 000000001cd2e000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_run_recovery_pass+0xf0/0x1e0 fs/bcachefs/recovery_passes.c:183 bch2_run_recovery_passes+0x19e/0x820 fs/bcachefs/recovery_passes.c:230 bch2_fs_recovery+0x24f9/0x38b0 fs/bcachefs/recovery.c:859 bch2_fs_start+0x356/0x5b0 fs/bcachefs/super.c:1036 bch2_fs_get_tree+0xd61/0x1700 fs/bcachefs/fs.c:1956 vfs_get_tree+0x90/0x2b0 fs/super.c:1800 do_new_mount+0x2be/0xb40 fs/namespace.c:3507 do_mount fs/namespace.c:3847 [inline] __do_sys_mount fs/namespace.c:4055 [inline] __se_sys_mount+0x2d6/0x3c0 fs/namespace.c:4032 do_syscall_x64 arch/x86/entry/common.c:52 [inline] do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7faa7277f69a Code: d8 64 89 02 48 c7 c0 ff ff ff ff eb a6 e8 de 1a 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007faa7360ee68 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 00007faa7360eef0 RCX: 00007faa7277f69a RDX: 00000000200058c0 RSI: 0000000020005900 RDI: 00007faa7360eeb0 RBP: 00000000200058c0 R08: 00007faa7360eef0 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000020005900 R13: 00007faa7360eeb0 R14: 00000000000058cd R15: 0000000020000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_alloc_read+0x17d9/0x24f0 fs/bcachefs/alloc_background.c:625 Code: 0f b6 04 10 84 c0 4c 8d a4 24 b0 02 00 00 49 89 d7 0f 85 78 04 00 00 48 8b 33 48 8b 3c 24 e8 5e 14 00 00 48 89 c3 48 c1 e8 03 <42> 0f b6 04 38 84 c0 0f 85 74 04 00 00 0f b6 44 24 30 88 03 48 8b RSP: 0018:ffffc90002caf0e0 EFLAGS: 00010246 RAX: 0000000000000000 RBX: 0000000000000000 RCX: ffff8901365a083c RDX: 0000000000000000 RSI: 0000000000000080 RDI: 0000008100000014 RBP: ffffc90002caf4c8 R08: ffffffff8409ef0e R09: 0000000000000000 R10: ffffc90002caf450 R11: fffff52000595e8c R12: ffffc90002caf390 R13: 000000000000001c R14: ffffc90002caf200 R15: dffffc0000000000 FS: 00007faa7360f6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005614673990c8 CR3: 000000001cd2e000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f b6 04 10 movzbl (%rax,%rdx,1),%eax 4: 84 c0 test %al,%al 6: 4c 8d a4 24 b0 02 00 lea 0x2b0(%rsp),%r12 d: 00 e: 49 89 d7 mov %rdx,%r15 11: 0f 85 78 04 00 00 jne 0x48f 17: 48 8b 33 mov (%rbx),%rsi 1a: 48 8b 3c 24 mov (%rsp),%rdi 1e: e8 5e 14 00 00 call 0x1481 23: 48 89 c3 mov %rax,%rbx 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 38 movzbl (%rax,%r15,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 0f 85 74 04 00 00 jne 0x4ab 37: 0f b6 44 24 30 movzbl 0x30(%rsp),%eax 3c: 88 03 mov %al,(%rbx) 3e: 48 rex.W 3f: 8b .byte 0x8b