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Message-ID: <000000000000ea6cba0615a3f177@google.com> Date: Mon, 08 Apr 2024 23:22:22 -0700 From: syzbot <syzbot+bba84aef3a26fb93deb9@...kaller.appspotmail.com> To: jfs-discussion@...ts.sourceforge.net, linux-fsdevel@...r.kernel.org, linux-kernel@...r.kernel.org, shaggy@...nel.org, syzkaller-bugs@...glegroups.com Subject: [syzbot] [jfs?] general protection fault in dtInsertEntry Hello, syzbot found the following issue on: HEAD commit: fe46a7dd189e Merge tag 'sound-6.9-rc1' of git://git.kernel.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=10056223180000 kernel config: https://syzkaller.appspot.com/x/.config?x=4d90a36f0cab495a dashboard link: https://syzkaller.appspot.com/bug?extid=bba84aef3a26fb93deb9 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=10548115180000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=136ecbb5180000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/72ab73815344/disk-fe46a7dd.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/2d6d6b0d7071/vmlinux-fe46a7dd.xz kernel image: https://storage.googleapis.com/syzbot-assets/48e275e5478b/bzImage-fe46a7dd.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/06e004bee618/mount_0.gz Bisection is inconclusive: the issue happens on the oldest tested release. bisection log: https://syzkaller.appspot.com/x/bisect.txt?x=1401ee15180000 final oops: https://syzkaller.appspot.com/x/report.txt?x=1601ee15180000 console output: https://syzkaller.appspot.com/x/log.txt?x=1201ee15180000 IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+bba84aef3a26fb93deb9@...kaller.appspotmail.com loop0: detected capacity change from 0 to 32768 general protection fault, probably for non-canonical address 0xdffffc0000000001: 0000 [#1] PREEMPT SMP KASAN PTI KASAN: null-ptr-deref in range [0x0000000000000008-0x000000000000000f] CPU: 0 PID: 5061 Comm: syz-executor404 Not tainted 6.8.0-syzkaller-08951-gfe46a7dd189e #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024 RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 Code: 83 e6 02 31 ff e8 a4 3f 75 fe 83 e3 02 75 3a e8 9a 3c 75 fe 48 8b 9c 24 a8 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 4c 89 f2 <42> 0f b6 04 30 84 c0 74 3e 89 d9 80 e1 07 38 c1 7c 35 48 89 df e8 RSP: 0018:ffffc9000381f060 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88801a715a00 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000381f210 R08: ffffffff831fb7ac R09: ffffffff832296af R10: 0000000000000004 R11: ffff88801a715a00 R12: ffff88807adfb130 R13: ffffffffffffffff R14: dffffc0000000000 R15: 000000000000000d FS: 000055558fe16380(0000) GS:ffff8880b9400000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 000000000066c7e0 CR3: 000000002ca48000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 Call Trace: <TASK> dtInsert+0xbf1/0x6b00 fs/jfs/jfs_dtree.c:891 jfs_create+0x7ba/0xb90 fs/jfs/namei.c:137 lookup_open fs/namei.c:3497 [inline] open_last_lookups fs/namei.c:3566 [inline] path_openat+0x1425/0x3240 fs/namei.c:3796 do_filp_open+0x235/0x490 fs/namei.c:3826 do_sys_openat2+0x13e/0x1d0 fs/open.c:1406 do_sys_open fs/open.c:1421 [inline] __do_sys_openat fs/open.c:1437 [inline] __se_sys_openat fs/open.c:1432 [inline] __x64_sys_openat+0x247/0x2a0 fs/open.c:1432 do_syscall_64+0xfb/0x240 entry_SYSCALL_64_after_hwframe+0x6d/0x75 RIP: 0033:0x7f30b7a475f9 Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 61 17 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:00007fffd9c3bfb8 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 00007fffd9c3c198 RCX: 00007f30b7a475f9 RDX: 000000000000275a RSI: 0000000020000080 RDI: 00000000ffffff9c RBP: 00007f30b7ac0610 R08: 0000000000005e33 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000001 R13: 00007fffd9c3c188 R14: 0000000000000001 R15: 0000000000000001 </TASK> Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dtInsertEntry+0xd0c/0x1780 fs/jfs/jfs_dtree.c:3713 Code: 83 e6 02 31 ff e8 a4 3f 75 fe 83 e3 02 75 3a e8 9a 3c 75 fe 48 8b 9c 24 a8 00 00 00 48 83 c3 08 48 89 d8 48 c1 e8 03 4c 89 f2 <42> 0f b6 04 30 84 c0 74 3e 89 d9 80 e1 07 38 c1 7c 35 48 89 df e8 RSP: 0018:ffffc9000381f060 EFLAGS: 00010202 RAX: 0000000000000001 RBX: 0000000000000008 RCX: ffff88801a715a00 RDX: dffffc0000000000 RSI: 0000000000000000 RDI: 0000000000000000 RBP: ffffc9000381f210 R08: ffffffff831fb7ac R09: ffffffff832296af R10: 0000000000000004 R11: ffff88801a715a00 R12: ffff88807adfb130 R13: ffffffffffffffff R14: dffffc0000000000 R15: 000000000000000d FS: 000055558fe16380(0000) GS:ffff8880b9500000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000557bf42357e0 CR3: 000000002ca48000 CR4: 00000000003506f0 DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000fffe0ff0 DR7: 0000000000000400 ---------------- Code disassembly (best guess): 0: 83 e6 02 and $0x2,%esi 3: 31 ff xor %edi,%edi 5: e8 a4 3f 75 fe call 0xfe753fae a: 83 e3 02 and $0x2,%ebx d: 75 3a jne 0x49 f: e8 9a 3c 75 fe call 0xfe753cae 14: 48 8b 9c 24 a8 00 00 mov 0xa8(%rsp),%rbx 1b: 00 1c: 48 83 c3 08 add $0x8,%rbx 20: 48 89 d8 mov %rbx,%rax 23: 48 c1 e8 03 shr $0x3,%rax 27: 4c 89 f2 mov %r14,%rdx * 2a: 42 0f b6 04 30 movzbl (%rax,%r14,1),%eax <-- trapping instruction 2f: 84 c0 test %al,%al 31: 74 3e je 0x71 33: 89 d9 mov %ebx,%ecx 35: 80 e1 07 and $0x7,%cl 38: 38 c1 cmp %al,%cl 3a: 7c 35 jl 0x71 3c: 48 89 df mov %rbx,%rdi 3f: e8 .byte 0xe8 --- 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@...glegroups.com. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. For information about bisection process see: https://goo.gl/tpsmEJ#bisection 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
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