loop0: detected capacity change from 0 to 32768 ======================================================= WARNING: The mand mount option has been deprecated and and is ignored by this kernel. Remove the mand option from the mount to silence this warning. ======================================================= BTRFS: device fsid c9fe44da-de57-406a-8241-57ec7d4412cf devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5106) BTRFS info (device loop0): first mount of filesystem c9fe44da-de57-406a-8241-57ec7d4412cf BTRFS info (device loop0): using crc32c (crc32c-intel) checksum algorithm BTRFS info (device loop0): using free-space-tree BTRFS: error (device loop0) in btrfs_fill_super:974: errno=-5 IO failure loop0: detected capacity change from 0 to 32768 BTRFS: device fsid a6a605fc-d5f1-4e66-8595-3726e2b761d6 devid 1 transid 8 /dev/loop0 (7:0) scanned by syz.0.0 (5106) BTRFS info (device loop0 state S): first mount of filesystem a6a605fc-d5f1-4e66-8595-3726e2b761d6 BTRFS info (device loop0 state S): using blake2b (blake2b-256-generic) checksum algorithm BTRFS info (device loop0 state S): using free-space-tree workqueue: max_active 32767 requested for btrfs-worker is out of range, clamping between 1 and 512 workqueue: max_active 32767 requested for btrfs-delalloc is out of range, clamping between 1 and 512 workqueue: max_active 32767 requested for btrfs-endio is out of range, clamping between 1 and 512 workqueue: max_active 32767 requested for btrfs-endio-meta is out of range, clamping between 1 and 512 workqueue: max_active 32767 requested for btrfs-rmw is out of range, clamping between 1 and 512 workqueue: max_active 32767 requested for btrfs-endio-write is out of range, clamping between 1 and 512 workqueue: max_active 32767 requested for btrfs-compressed-write is out of range, clamping between 1 and 512 BTRFS info (device loop0 state MCS): resize thread pool 32767 -> 3 capability: warning: `syz.0.0' uses 32-bit capabilities (legacy support in use) Oops: general protection fault, probably for non-canonical address 0xdffffc0000000041: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000208-0x000000000000020f] CPU: 0 UID: 0 PID: 5106 Comm: syz.0.0 Not tainted 6.12.0-rc3-syzkaller-00087-gc964ced77262 #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:btrfs_lookup_csums_list+0xb4/0x1670 fs/btrfs/file-item.c:470 Code: 29 48 89 4c 24 70 42 c7 44 29 08 f3 f3 f3 f3 e8 02 a3 e1 fd 48 89 9c 24 d0 00 00 00 48 81 c3 08 02 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1d 56 4b fe 48 8b 03 48 89 44 24 RSP: 0018:ffffc90002dced00 EFLAGS: 00010206 RAX: 0000000000000041 RBX: 0000000000000208 RCX: 0000000000040000 RDX: ffffc9000b4d9000 RSI: 00000000000003c6 RDI: 00000000000003c7 RBP: ffffc90002dceea8 R08: 0000000000000000 R09: 1ffff1100262380d R10: dffffc0000000000 R11: ffffed100262380e R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880121e8208 FS: 00007fd76b1ff6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000056475f153328 CR3: 00000000122dc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: can_nocow_file_extent+0x808/0xa40 fs/btrfs/inode.c:1989 can_nocow_extent+0x5a0/0x940 fs/btrfs/inode.c:7096 btrfs_get_blocks_direct_write+0x370/0xfa0 fs/btrfs/direct-io.c:251 btrfs_dio_iomap_begin+0xbb7/0x1180 fs/btrfs/direct-io.c:525 iomap_iter+0x691/0xf60 fs/iomap/iter.c:91 __iomap_dio_rw+0xdea/0x2370 fs/iomap/direct-io.c:677 btrfs_dio_write fs/btrfs/direct-io.c:775 [inline] btrfs_direct_write+0x61b/0xa70 fs/btrfs/direct-io.c:880 btrfs_do_write_iter+0x2a0/0x760 fs/btrfs/file.c:1505 do_iter_readv_writev+0x600/0x880 vfs_writev+0x376/0xba0 fs/read_write.c:1064 do_pwritev fs/read_write.c:1165 [inline] __do_sys_pwritev2 fs/read_write.c:1224 [inline] __se_sys_pwritev2+0x1ca/0x2d0 fs/read_write.c:1215 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: 0033:0x7fd76b37dff9 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:00007fd76b1ff038 EFLAGS: 00000246 ORIG_RAX: 0000000000000148 RAX: ffffffffffffffda RBX: 00007fd76b535f80 RCX: 00007fd76b37dff9 RDX: 0000000000000001 RSI: 0000000020000240 RDI: 0000000000000008 RBP: 00007fd76b3f0296 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000100000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007fd76b535f80 R15: 00007ffddb7973f8 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:btrfs_lookup_csums_list+0xb4/0x1670 fs/btrfs/file-item.c:470 Code: 29 48 89 4c 24 70 42 c7 44 29 08 f3 f3 f3 f3 e8 02 a3 e1 fd 48 89 9c 24 d0 00 00 00 48 81 c3 08 02 00 00 48 89 d8 48 c1 e8 03 <42> 80 3c 28 00 74 08 48 89 df e8 1d 56 4b fe 48 8b 03 48 89 44 24 RSP: 0018:ffffc90002dced00 EFLAGS: 00010206 RAX: 0000000000000041 RBX: 0000000000000208 RCX: 0000000000040000 RDX: ffffc9000b4d9000 RSI: 00000000000003c6 RDI: 00000000000003c7 RBP: ffffc90002dceea8 R08: 0000000000000000 R09: 1ffff1100262380d R10: dffffc0000000000 R11: ffffed100262380e R12: 0000000000000000 R13: dffffc0000000000 R14: 0000000000000000 R15: ffff8880121e8208 FS: 00007fd76b1ff6c0(0000) GS:ffff88801fc00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005623bd59ada8 CR3: 00000000122dc000 CR4: 0000000000352ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 29 48 89 sub %ecx,-0x77(%rax) 3: 4c 24 70 rex.WR and $0x70,%al 6: 42 c7 44 29 08 f3 f3 movl $0xf3f3f3f3,0x8(%rcx,%r13,1) d: f3 f3 f: e8 02 a3 e1 fd call 0xfde1a316 14: 48 89 9c 24 d0 00 00 mov %rbx,0xd0(%rsp) 1b: 00 1c: 48 81 c3 08 02 00 00 add $0x208,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 28 00 cmpb $0x0,(%rax,%r13,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 1d 56 4b fe call 0xfe4b5656 39: 48 8b 03 mov (%rbx),%rax 3c: 48 rex.W 3d: 89 .byte 0x89 3e: 44 rex.R 3f: 24 .byte 0x24