bcachefs (loop0): done starting filesystem Oops: general protection fault, probably for non-canonical address 0xdffffc0000000013: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000098-0x000000000000009f] CPU: 1 UID: 0 PID: 6254 Comm: syz.0.49 Not tainted 6.13.0-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 12/27/2024 RIP: 0010:btree_path_lock_root fs/bcachefs/btree_iter.c:732 [inline] RIP: 0010:bch2_btree_path_traverse_one+0x94a/0x2940 fs/bcachefs/btree_iter.c:1183 Code: 89 44 24 60 42 80 3c 20 00 74 08 4c 89 ef e8 2d 40 e8 fd 49 8b 45 00 48 89 44 24 48 48 8d 90 98 00 00 00 48 89 d0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 48 89 94 24 80 00 00 00 0f 85 ee 10 00 00 4c RSP: 0018:ffffc900031f4fe0 EFLAGS: 00010202 RAX: 0000000000000013 RBX: 0000000000000000 RCX: 0000000000080000 RDX: 0000000000000098 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900031f52d0 R08: ffffffff841b0610 R09: ffffffff841ae689 R10: 0000000000000002 R11: ffff8880302a8000 R12: dffffc0000000000 R13: ffff888065a814d8 R14: ffff888060df8490 R15: 000000000000110b FS: 00007f201f5876c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005566bec32668 CR3: 0000000031378000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: bch2_btree_path_traverse fs/bcachefs/btree_iter.h:247 [inline] __bch2_btree_iter_peek fs/bcachefs/btree_iter.c:2210 [inline] bch2_btree_iter_peek_upto+0xb58/0x70e0 fs/bcachefs/btree_iter.c:2310 bch2_btree_iter_peek_upto_type fs/bcachefs/btree_iter.h:685 [inline] bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:495 [inline] bch2_bucket_alloc_trans+0x1122/0x3a50 fs/bcachefs/alloc_foreground.c:648 bch2_bucket_alloc_set_trans+0x517/0xd30 fs/bcachefs/alloc_foreground.c:808 __open_bucket_add_buckets+0x13d0/0x1ec0 fs/bcachefs/alloc_foreground.c:1057 open_bucket_add_buckets+0x33a/0x410 fs/bcachefs/alloc_foreground.c:1101 bch2_alloc_sectors_start_trans+0xce9/0x2030 __bch2_btree_node_alloc fs/bcachefs/btree_update_interior.c:339 [inline] bch2_btree_reserve_get+0x612/0x1890 fs/bcachefs/btree_update_interior.c:549 bch2_btree_update_start+0xe56/0x14e0 fs/bcachefs/btree_update_interior.c:1247 bch2_btree_split_leaf+0x123/0x840 fs/bcachefs/btree_update_interior.c:1856 bch2_trans_commit_error+0x212/0x1380 fs/bcachefs/btree_trans_commit.c:942 __bch2_trans_commit+0x7ead/0x93c0 fs/bcachefs/btree_trans_commit.c:1140 bch2_trans_commit fs/bcachefs/btree_update.h:184 [inline] bch2_logged_op_start+0x1c8/0x310 fs/bcachefs/logged_ops.c:92 bch2_truncate+0x19e/0x2d0 fs/bcachefs/io_misc.c:294 bchfs_truncate+0x85f/0xc90 fs/bcachefs/fs-io.c:464 notify_change+0xbca/0xe90 fs/attr.c:552 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3449 [inline] do_open fs/namei.c:3832 [inline] path_openat+0x2e1e/0x3590 fs/namei.c:3987 do_filp_open+0x27f/0x4e0 fs/namei.c:4014 do_sys_openat2+0x13e/0x1d0 fs/open.c:1402 do_sys_open fs/open.c:1417 [inline] __do_sys_openat fs/open.c:1433 [inline] __se_sys_openat fs/open.c:1428 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1428 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: 0033:0x7f201e785d29 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 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 a8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f201f587038 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007f201e975fa0 RCX: 00007f201e785d29 RDX: 000000000014b201 RSI: 0000000020000040 RDI: ffffffffffffff9c RBP: 00007f201e801b08 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000098 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f201e975fa0 R15: 00007ffebb19ed78 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btree_path_lock_root fs/bcachefs/btree_iter.c:732 [inline] RIP: 0010:bch2_btree_path_traverse_one+0x94a/0x2940 fs/bcachefs/btree_iter.c:1183 Code: 89 44 24 60 42 80 3c 20 00 74 08 4c 89 ef e8 2d 40 e8 fd 49 8b 45 00 48 89 44 24 48 48 8d 90 98 00 00 00 48 89 d0 48 c1 e8 03 <42> 0f b6 04 20 84 c0 48 89 94 24 80 00 00 00 0f 85 ee 10 00 00 4c RSP: 0018:ffffc900031f4fe0 EFLAGS: 00010202 RAX: 0000000000000013 RBX: 0000000000000000 RCX: 0000000000080000 RDX: 0000000000000098 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc900031f52d0 R08: ffffffff841b0610 R09: ffffffff841ae689 R10: 0000000000000002 R11: ffff8880302a8000 R12: dffffc0000000000 R13: ffff888065a814d8 R14: ffff888060df8490 R15: 000000000000110b FS: 00007f201f5876c0(0000) GS:ffff8880b8700000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000055f4e0aa70e0 CR3: 0000000031378000 CR4: 00000000003526f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 89 44 24 60 mov %eax,0x60(%rsp) 4: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) 9: 74 08 je 0x13 b: 4c 89 ef mov %r13,%rdi e: e8 2d 40 e8 fd call 0xfde84040 13: 49 8b 45 00 mov 0x0(%r13),%rax 17: 48 89 44 24 48 mov %rax,0x48(%rsp) 1c: 48 8d 90 98 00 00 00 lea 0x98(%rax),%rdx 23: 48 89 d0 mov %rdx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 0f b6 04 20 movzbl (%rax,%r12,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 48 89 94 24 80 00 00 mov %rdx,0x80(%rsp) 38: 00 39: 0f 85 ee 10 00 00 jne 0x112d 3f: 4c rex.WR