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06:49:43 -0700 (PDT) Date: Sat, 01 Oct 2022 06:49:43 -0700 X-Google-Appengine-App-Id: s~syzkaller X-Google-Appengine-App-Id-Alias: syzkaller Message-ID: <000000000000ff4a1505e9f961a2@google.com> Subject: [syzbot] general protection fault in dtSplitUp From: syzbot To: jfs-discussion@lists.sourceforge.net, linux-kernel@vger.kernel.org, shaggy@kernel.org, syzkaller-bugs@googlegroups.com Content-Type: text/plain; charset="UTF-8" Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello, syzbot found the following issue on: HEAD commit: 5a77386984b5 Merge tag 'drm-fixes-2022-09-30-1' of git://a.. git tree: upstream console+strace: https://syzkaller.appspot.com/x/log.txt?x=15c1e370880000 kernel config: https://syzkaller.appspot.com/x/.config?x=755695d26ad09807 dashboard link: https://syzkaller.appspot.com/bug?extid=172bdd582e5d63486948 compiler: gcc (Debian 10.2.1-6) 10.2.1 20210110, GNU ld (GNU Binutils for Debian) 2.35.2 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=13f2dc48880000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=1027d814880000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/87931d29c9af/disk-5a773869.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/afb91893f060/vmlinux-5a773869.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+172bdd582e5d63486948@syzkaller.appspotmail.com loop0: detected capacity change from 0 to 32768 general protection fault, probably for non-canonical address 0xdffffc0000000000: 0000 [#1] PREEMPT SMP KASAN KASAN: null-ptr-deref in range [0x0000000000000000-0x0000000000000007] CPU: 1 PID: 3612 Comm: syz-executor263 Not tainted 6.0.0-rc7-syzkaller-00162-g5a77386984b5 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/22/2022 RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline] RIP: 0010:dtSplitUp+0x1528/0x5120 fs/jfs/jfs_dtree.c:1034 Code: c6 74 11 e8 3a 46 a1 fe 48 8b 44 24 20 49 8d 5e e8 48 89 18 e8 29 46 a1 fe 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 90 35 00 00 4c 8b 33 31 ff 4c 89 f6 e8 e1 42 a1 RSP: 0018:ffffc9000395f2c8 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff82dac1f7 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888073ee333a R14: ffffc9000395f7f0 R15: ffff888073ee3270 FS: 00005555556d7300(0000) GS:ffff8880b9b00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005599fad45028 CR3: 000000001d4a7000 CR4: 0000000000350ee0 Call Trace: dtInsert+0x82b/0xa10 fs/jfs/jfs_dtree.c:863 jfs_create+0x5b7/0xac0 fs/jfs/namei.c:137 lookup_open.isra.0+0xf05/0x12a0 fs/namei.c:3413 open_last_lookups fs/namei.c:3481 [inline] path_openat+0x996/0x28f0 fs/namei.c:3688 do_filp_open+0x1b6/0x400 fs/namei.c:3718 do_sys_openat2+0x16d/0x4c0 fs/open.c:1313 do_sys_open fs/open.c:1329 [inline] __do_sys_openat fs/open.c:1345 [inline] __se_sys_openat fs/open.c:1340 [inline] __x64_sys_openat+0x13f/0x1f0 fs/open.c:1340 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x63/0xcd RIP: 0033:0x7f1da668d019 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 c0 ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007fff79c19d48 EFLAGS: 00000246 ORIG_RAX: 0000000000000101 RAX: ffffffffffffffda RBX: 0030656c69662f2e RCX: 00007f1da668d019 RDX: 0000000000161842 RSI: 000000002000c380 RDI: 00000000ffffff9c RBP: 00007f1da664c7e0 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 00000000f8008000 R13: 0000000000000000 R14: 0000000a00030083 R15: 0000000000000000 Modules linked in: ---[ end trace 0000000000000000 ]--- RIP: 0010:dtExtendPage fs/jfs/jfs_dtree.c:1661 [inline] RIP: 0010:dtSplitUp+0x1528/0x5120 fs/jfs/jfs_dtree.c:1034 Code: c6 74 11 e8 3a 46 a1 fe 48 8b 44 24 20 49 8d 5e e8 48 89 18 e8 29 46 a1 fe 48 89 da 48 b8 00 00 00 00 00 fc ff df 48 c1 ea 03 <80> 3c 02 00 0f 85 90 35 00 00 4c 8b 33 31 ff 4c 89 f6 e8 e1 42 a1 RSP: 0018:ffffc9000395f2c8 EFLAGS: 00010256 RAX: dffffc0000000000 RBX: 0000000000000000 RCX: 0000000000000000 RDX: 0000000000000000 RSI: ffffffff82dac1f7 RDI: 0000000000000003 RBP: 0000000000000000 R08: 0000000000000003 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000000 R12: 0000000000000000 R13: ffff888073ee333a R14: ffffc9000395f7f0 R15: ffff888073ee3270 FS: 00005555556d7300(0000) GS:ffff8880b9a00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 00005584d071b470 CR3: 000000001d4a7000 CR4: 0000000000350ef0 ---------------- Code disassembly (best guess), 1 bytes skipped: 0: 74 11 je 0x13 2: e8 3a 46 a1 fe callq 0xfea14641 7: 48 8b 44 24 20 mov 0x20(%rsp),%rax c: 49 8d 5e e8 lea -0x18(%r14),%rbx 10: 48 89 18 mov %rbx,(%rax) 13: e8 29 46 a1 fe callq 0xfea14641 18: 48 89 da mov %rbx,%rdx 1b: 48 b8 00 00 00 00 00 movabs $0xdffffc0000000000,%rax 22: fc ff df 25: 48 c1 ea 03 shr $0x3,%rdx * 29: 80 3c 02 00 cmpb $0x0,(%rdx,%rax,1) <-- trapping instruction 2d: 0f 85 90 35 00 00 jne 0x35c3 33: 4c 8b 33 mov (%rbx),%r14 36: 31 ff xor %edi,%edi 38: 4c 89 f6 mov %r14,%rsi 3b: e8 .byte 0xe8 3c: e1 42 loope 0x80 3e: a1 .byte 0xa1 --- 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. syzbot can test patches for this issue, for details see: https://goo.gl/tpsmEJ#testing-patches