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List-Unsubscribe: MIME-Version: 1.0 X-Received: by 2002:a92:c544:0:b0:3a0:91e7:67cc with SMTP id e9e14a558f8ab-3a0c8ceecd2mr63888635ab.13.1726938380225; Sat, 21 Sep 2024 10:06:20 -0700 (PDT) Date: Sat, 21 Sep 2024 10:06:20 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <66eefd0c.050a0220.3195df.0061.GAE@google.com> Subject: [syzbot] [udf?] general protection fault in udf_read_folio From: syzbot To: jack@suse.com, linux-kernel@vger.kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Hello, syzbot found the following issue on: HEAD commit: a940d9a43e62 Merge tag 'soc-arm-6.12' of git://git.kernel... git tree: upstream console output: https://syzkaller.appspot.com/x/log.txt?x=1099869f980000 kernel config: https://syzkaller.appspot.com/x/.config?x=1653f803fffa3848 dashboard link: https://syzkaller.appspot.com/bug?extid=ddf8715339c89280b6fc compiler: Debian clang version 15.0.6, GNU ld (GNU Binutils for Debian) 2.40 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=14d53500580000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=134c3fc7980000 Downloadable assets: disk image (non-bootable): https://storage.googleapis.com/syzbot-assets/7bc7510fe41f/non_bootable_disk-a940d9a4.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/371e11b6a9e5/vmlinux-a940d9a4.xz kernel image: https://storage.googleapis.com/syzbot-assets/920eb0c53785/bzImage-a940d9a4.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/2a8d27ffca62/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+ddf8715339c89280b6fc@syzkaller.appspotmail.com 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 --- This report is generated by a bot. It may contain errors. See https://goo.gl/tpsmEJ for more information about syzbot. syzbot engineers can be reached at syzkaller@googlegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the report is already addressed, let syzbot know by replying with: #syz fix: exact-commit-title If you want syzbot to run the reproducer, reply with: #syz test: git://repo/address.git branch-or-commit-hash If you attach or paste a git patch, syzbot will apply it before testing. If you want to overwrite report's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the report is a duplicate of another one, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup