Hello, syzbot found the following issue on: HEAD commit: 14f8db1c0f9a Merge branch 'for-next/core' into for-kernelci git tree: git://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-kernelci console output: https://syzkaller.appspot.com/x/log.txt?x=13c79eca280000 kernel config: https://syzkaller.appspot.com/x/.config?x=a837a8ba7e88bb45 dashboard link: https://syzkaller.appspot.com/bug?extid=e633c79ceaecbf479854 compiler: Debian clang version 15.0.7, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 syz repro: https://syzkaller.appspot.com/x/repro.syz?x=130464fa280000 C reproducer: https://syzkaller.appspot.com/x/repro.c?x=13134234280000 Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/ad6ce516eed3/disk-14f8db1c.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/1f38c2cc7667/vmlinux-14f8db1c.xz kernel image: https://storage.googleapis.com/syzbot-assets/d795115eee39/Image-14f8db1c.gz.xz mounted in repro: https://storage.googleapis.com/syzbot-assets/aa1d3602f38e/mount_0.gz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+e633c79ceaecbf479854@xxxxxxxxxxxxxxxxxxxxxxxxx Unable to handle kernel paging request at virtual address dfff800000000005 KASAN: null-ptr-deref in range [0x0000000000000028-0x000000000000002f] Mem abort info: ESR = 0x0000000096000006 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x06: level 2 translation fault Data abort info: ISV = 0, ISS = 0x00000006 CM = 0, WnR = 0 [dfff800000000005] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 6080 Comm: syz-executor747 Not tainted 6.3.0-rc7-syzkaller-g14f8db1c0f9a #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/14/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : ext4_acquire_dquot+0x1d4/0x398 fs/ext4/super.c:6766 lr : dquot_to_inode fs/ext4/super.c:6740 [inline] lr : ext4_acquire_dquot+0x1ac/0x398 fs/ext4/super.c:6766 sp : ffff80001eb27280 x29: ffff80001eb27280 x28: 1fffe0001c3c01fc x27: ffff800015d705b0 x26: ffff0000dd93c000 x25: ffff0000dd93e000 x24: 1fffe0001c3c021c x23: dfff800000000000 x22: 0000000000000049 x21: 0000000000000028 x20: 0000000000000000 x19: ffff0000e1e00fc0 x18: ffff0001b426cca8 x17: 0000000000000000 x16: ffff8000089669b0 x15: 0000000000000001 x14: 1ffff00002bae0b0 x13: dfff800000000000 x12: 0000000000000001 x11: 0000000000000000 x10: 0000000000000000 x9 : 0000000000000000 x8 : 0000000000000005 x7 : ffff800008c11f68 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800012441b4c x2 : 0000000000000001 x1 : 0000000000000001 x0 : 0000000000000003 Call trace: ext4_acquire_dquot+0x1d4/0x398 fs/ext4/super.c:6766 dqget+0x844/0xc48 fs/quota/dquot.c:914 __dquot_initialize+0x2cc/0xb54 fs/quota/dquot.c:1492 dquot_initialize fs/quota/dquot.c:1550 [inline] dquot_file_open+0x90/0xc8 fs/quota/dquot.c:2181 ext4_file_open+0x230/0x590 fs/ext4/file.c:903 do_dentry_open+0x724/0xf90 fs/open.c:920 vfs_open+0x7c/0x90 fs/open.c:1051 do_open fs/namei.c:3560 [inline] path_openat+0x1f2c/0x27f8 fs/namei.c:3715 do_filp_open+0x1bc/0x3cc fs/namei.c:3742 do_sys_openat2+0x128/0x3d8 fs/open.c:1348 do_sys_open fs/open.c:1364 [inline] __do_sys_openat fs/open.c:1380 [inline] __se_sys_openat fs/open.c:1375 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1375 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: 97e8a7df f94002a8 9100a115 d343fea8 (38776908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97e8a7df bl 0xffffffffffa29f7c 4: f94002a8 ldr x8, [x21] 8: 9100a115 add x21, x8, #0x28 c: d343fea8 lsr x8, x21, #3 * 10: 38776908 ldrb w8, [x8, x23] <-- trapping instruction --- 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@xxxxxxxxxxxxxxxx. syzbot will keep track of this issue. See: https://goo.gl/tpsmEJ#status for how to communicate with syzbot. If the bug is already fixed, 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 change bug's subsystems, reply with: #syz set subsystems: new-subsystem (See the list of subsystem names on the web dashboard) If the bug is a duplicate of another bug, reply with: #syz dup: exact-subject-of-another-report If you want to undo deduplication, reply with: #syz undup
