------------[ cut here ]------------ kernel BUG at fs/bcachefs/alloc_foreground.c:493! Oops: invalid opcode: 0000 [#1] PREEMPT SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5335 Comm: syz.0.0 Not tainted 6.12.0-rc7-syzkaller #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_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:493 [inline] RIP: 0010:bch2_bucket_alloc_trans+0x39ec/0x3a50 fs/bcachefs/alloc_foreground.c:648 Code: e8 f9 38 f0 fd e9 f0 c7 ff ff 89 d9 80 e1 07 38 c1 0f 8c f3 fd ff ff 48 89 df e8 8f 37 f0 fd e9 e6 fd ff ff e8 a5 6d 86 fd 90 <0f> 0b e8 9d 6d 86 fd 90 0f 0b e8 85 0a b9 07 f3 0f 1e fa e8 8c 6d RSP: 0018:ffffc9000d125760 EFLAGS: 00010283 RAX: ffffffff840e6c6b RBX: 0000000000000019 RCX: 0000000000040000 RDX: ffffc9000db63000 RSI: 0000000000006f31 RDI: 0000000000006f32 RBP: ffffc9000d125e88 R08: ffffffff840e3f39 R09: 0000000000000000 R10: ffffc9000d125d48 R11: fffff52001a24bae R12: dffffc0000000000 R13: ffff88804e890000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe5419df6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fe5419def98 CR3: 0000000036c6e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: 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+0x212/0x1390 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:503 do_truncate+0x220/0x310 fs/open.c:65 handle_truncate fs/namei.c:3395 [inline] do_open fs/namei.c:3778 [inline] path_openat+0x2e1e/0x3590 fs/namei.c:3933 do_filp_open+0x235/0x490 fs/namei.c:3960 do_sys_openat2+0x13e/0x1d0 fs/open.c:1415 do_sys_open fs/open.c:1430 [inline] __do_sys_creat fs/open.c:1508 [inline] __se_sys_creat fs/open.c:1502 [inline] __x64_sys_creat+0x123/0x170 fs/open.c:1502 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: 0033:0x7fe540b7e719 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:00007fe5419df038 EFLAGS: 00000246 ORIG_RAX: 0000000000000055 RAX: ffffffffffffffda RBX: 00007fe540d36058 RCX: 00007fe540b7e719 RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000080 RBP: 00007fe540bf139e R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fe540d36058 R15: 00007ffd84305ef8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:bch2_bucket_alloc_freelist fs/bcachefs/alloc_foreground.c:493 [inline] RIP: 0010:bch2_bucket_alloc_trans+0x39ec/0x3a50 fs/bcachefs/alloc_foreground.c:648 Code: e8 f9 38 f0 fd e9 f0 c7 ff ff 89 d9 80 e1 07 38 c1 0f 8c f3 fd ff ff 48 89 df e8 8f 37 f0 fd e9 e6 fd ff ff e8 a5 6d 86 fd 90 <0f> 0b e8 9d 6d 86 fd 90 0f 0b e8 85 0a b9 07 f3 0f 1e fa e8 8c 6d RSP: 0018:ffffc9000d125760 EFLAGS: 00010283 RAX: ffffffff840e6c6b RBX: 0000000000000019 RCX: 0000000000040000 RDX: ffffc9000db63000 RSI: 0000000000006f31 RDI: 0000000000006f32 RBP: ffffc9000d125e88 R08: ffffffff840e3f39 R09: 0000000000000000 R10: ffffc9000d125d48 R11: fffff52001a24bae R12: dffffc0000000000 R13: ffff88804e890000 R14: 0000000000000000 R15: 0000000000000000 FS: 00007fe5419df6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005601209ce038 CR3: 0000000036c6e000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400