loop0: detected capacity change from 0 to 1024 UDF-fs: INFO Mounting volume 'LinuxUDF', timestamp 2022/11/22 14:59 (1000) ./file1: Can't lookup blockdev Oops: general protection fault, probably for non-canonical address 0xdffffc000000000d: 0000 [#1] PREEMPT SMP KASAN NOPTI KASAN: null-ptr-deref in range [0x0000000000000068-0x000000000000006f] CPU: 0 UID: 0 PID: 5113 Comm: syz-executor381 Not tainted 6.11.0-syzkaller-03917-ga940d9a43e62 #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:file_inode include/linux/fs.h:1123 [inline] RIP: 0010:udf_read_folio+0x2b/0xc0 fs/udf/inode.c:223 Code: 0f 1e fa 41 57 41 56 41 54 53 49 89 f6 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 e0 1d 75 fe 48 83 c3 68 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 c6 62 dc fe 49 c7 c7 e8 fe ff ff RSP: 0018:ffffc9000179f9d8 EFLAGS: 00010202 RAX: 000000000000000d RBX: 0000000000000068 RCX: ffff888000eac880 RDX: 0000000000000000 RSI: ffffea000002ecc0 RDI: 0000000000000000 RBP: ffffc9000179fac0 R08: ffffea000002ecc7 R09: 1ffffd4000005d98 R10: dffffc0000000000 R11: ffffffff831f0c40 R12: dffffc0000000000 R13: 1ffffd4000005d99 R14: ffffea000002ecc0 R15: ffffea000002ecc8 FS: 0000555563e91380(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f57a987fe00 CR3: 000000003dd1a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: filemap_read_folio+0x1a0/0x790 mm/filemap.c:2355 do_read_cache_folio+0x134/0x820 mm/filemap.c:3796 read_mapping_folio include/linux/pagemap.h:915 [inline] erofs_bread+0x499/0xd40 fs/erofs/data.c:41 erofs_read_superblock fs/erofs/super.c:277 [inline] erofs_fc_fill_super+0x345/0x1770 fs/erofs/super.c:621 vfs_get_super fs/super.c:1280 [inline] get_tree_nodev+0xb7/0x140 fs/super.c:1299 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: 0033:0x7f57b1c85309 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 b1 1c 00 00 90 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 b8 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007ffe09300b48 EFLAGS: 00000246 ORIG_RAX: 00000000000000a5 RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00007f57b1c85309 RDX: 00000000200005c0 RSI: 0000000020000580 RDI: 0000000020000540 RBP: 00000000ffffffff R08: 0000000000000000 R09: 0000000000004400 R10: 0000000000200000 R11: 0000000000000246 R12: 00007ffe09300b90 R13: 00007ffe09300bd0 R14: 0000000000080000 R15: 0000000000000003 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:file_inode include/linux/fs.h:1123 [inline] RIP: 0010:udf_read_folio+0x2b/0xc0 fs/udf/inode.c:223 Code: 0f 1e fa 41 57 41 56 41 54 53 49 89 f6 48 89 fb 49 bc 00 00 00 00 00 fc ff df e8 e0 1d 75 fe 48 83 c3 68 48 89 d8 48 c1 e8 03 <42> 80 3c 20 00 74 08 48 89 df e8 c6 62 dc fe 49 c7 c7 e8 fe ff ff RSP: 0018:ffffc9000179f9d8 EFLAGS: 00010202 RAX: 000000000000000d RBX: 0000000000000068 RCX: ffff888000eac880 RDX: 0000000000000000 RSI: ffffea000002ecc0 RDI: 0000000000000000 RBP: ffffc9000179fac0 R08: ffffea000002ecc7 R09: 1ffffd4000005d98 R10: dffffc0000000000 R11: ffffffff831f0c40 R12: dffffc0000000000 R13: 1ffffd4000005d99 R14: ffffea000002ecc0 R15: ffffea000002ecc8 FS: 0000555563e91380(0000) GS:ffff88801fe00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00007f57a987fe00 CR3: 000000003dd1a000 CR4: 0000000000350ef0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 0f 1e fa nop %edx 3: 41 57 push %r15 5: 41 56 push %r14 7: 41 54 push %r12 9: 53 push %rbx a: 49 89 f6 mov %rsi,%r14 d: 48 89 fb mov %rdi,%rbx 10: 49 bc 00 00 00 00 00 movabs $0xdffffc0000000000,%r12 17: fc ff df 1a: e8 e0 1d 75 fe call 0xfe751dff 1f: 48 83 c3 68 add $0x68,%rbx 23: 48 89 d8 mov %rbx,%rax 26: 48 c1 e8 03 shr $0x3,%rax * 2a: 42 80 3c 20 00 cmpb $0x0,(%rax,%r12,1) <-- trapping instruction 2f: 74 08 je 0x39 31: 48 89 df mov %rbx,%rdi 34: e8 c6 62 dc fe call 0xfedc62ff 39: 49 c7 c7 e8 fe ff ff mov $0xfffffffffffffee8,%r15