sch_tbf: burst 18 is lower than device lo mtu (65550) ! loop0: detected capacity change from 32768 to 32704 ------------[ cut here ]------------ kernel BUG at fs/ocfs2/suballoc.c:900! Oops: invalid opcode: 0000 [#1] SMP KASAN NOPTI CPU: 0 UID: 0 PID: 5334 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:ocfs2_reserve_suballoc_bits+0x40b5/0x4840 fs/ocfs2/suballoc.c:900 Code: 24 78 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 9d da ff ff 48 89 df e8 f6 99 64 fe e9 90 da ff ff e8 1c b5 f7 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 3a dc ff ff 4c 89 f7 RSP: 0018:ffffc9000c316160 EFLAGS: 00010283 RAX: ffffffff83ce1224 RBX: 00000000ffffffff RCX: 0000000000100000 RDX: ffffc90020001000 RSI: 00000000000cf1cd RDI: 00000000000cf1ce RBP: ffffc9000c316630 R08: ffffffff903045f7 R09: 1ffffffff20608be R10: dffffc0000000000 R11: fffffbfff20608bf R12: ffff888046f95c60 R13: ffff888055c82e00 R14: dffffc0000000000 R15: fffff52001862c58 FS: 00007fb27b8996c0(0000) GS:ffff88808c893000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb26efff000 CR3: 00000000441ff000 CR4: 0000000000352ef0 Call Trace: ocfs2_reserve_cluster_bitmap_bits+0xc4/0x1d0 fs/ocfs2/suballoc.c:1228 ocfs2_local_alloc_reserve_for_window fs/ocfs2/localalloc.c:1106 [inline] ocfs2_local_alloc_slide_window fs/ocfs2/localalloc.c:1242 [inline] ocfs2_reserve_local_alloc_bits+0x8c1/0x2660 fs/ocfs2/localalloc.c:669 ocfs2_reserve_clusters_with_limit+0x1b9/0xc20 fs/ocfs2/suballoc.c:1262 ocfs2_reserve_clusters fs/ocfs2/suballoc.c:1323 [inline] ocfs2_lock_allocators+0x2d8/0x600 fs/ocfs2/suballoc.c:3098 ocfs2_write_begin_nolock+0x1b2a/0x41a0 fs/ocfs2/aops.c:1720 ocfs2_write_begin+0x1c5/0x320 fs/ocfs2/aops.c:1885 generic_perform_write+0x2e2/0x8f0 mm/filemap.c:4325 ocfs2_file_write_iter+0x1663/0x1e70 fs/ocfs2/file.c:2476 iter_file_splice_write+0x9a1/0x10f0 fs/splice.c:736 do_splice_from fs/splice.c:936 [inline] direct_splice_actor+0x101/0x160 fs/splice.c:1159 splice_direct_to_actor+0x53a/0xc70 fs/splice.c:1103 do_splice_direct_actor fs/splice.c:1202 [inline] do_splice_direct+0x195/0x290 fs/splice.c:1228 do_sendfile+0x535/0x7d0 fs/read_write.c:1372 __do_sys_sendfile64 fs/read_write.c:1433 [inline] __se_sys_sendfile64+0x144/0x1a0 fs/read_write.c:1419 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0x174/0x580 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7fb27a99ce59 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:00007fb27b898fe8 EFLAGS: 00000246 ORIG_RAX: 0000000000000028 RAX: ffffffffffffffda RBX: 00007fb27ac16090 RCX: 00007fb27a99ce59 RDX: 0000000000000000 RSI: 0000000000000006 RDI: 0000000000000006 RBP: 00007fb27aa32d6f R08: 0000000000000000 R09: 0000000000000000 R10: 0001000000201005 R11: 0000000000000246 R12: 0000000000000000 R13: 00007fb27ac16128 R14: 00007fb27ac16090 R15: 00007fff152581e8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:ocfs2_reserve_suballoc_bits+0x40b5/0x4840 fs/ocfs2/suballoc.c:900 Code: 24 78 e9 23 f1 ff ff 89 d9 80 e1 07 80 c1 03 38 c1 0f 8c 9d da ff ff 48 89 df e8 f6 99 64 fe e9 90 da ff ff e8 1c b5 f7 fd 90 <0f> 0b 44 89 f1 80 e1 07 80 c1 03 38 c1 0f 8c 3a dc ff ff 4c 89 f7 RSP: 0018:ffffc9000c316160 EFLAGS: 00010283 RAX: ffffffff83ce1224 RBX: 00000000ffffffff RCX: 0000000000100000 RDX: ffffc90020001000 RSI: 00000000000cf1cd RDI: 00000000000cf1ce RBP: ffffc9000c316630 R08: ffffffff903045f7 R09: 1ffffffff20608be R10: dffffc0000000000 R11: fffffbfff20608bf R12: ffff888046f95c60 R13: ffff888055c82e00 R14: dffffc0000000000 R15: fffff52001862c58 FS: 00007fb27b8996c0(0000) GS:ffff88808c893000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007fb26efff000 CR3: 00000000441ff000 CR4: 0000000000352ef0