Hello, syzbot found the following issue on: HEAD commit: bbed346d5a96 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=106158fe880000 kernel config: https://syzkaller.appspot.com/x/.config?x=3a4a45d2d827c1e dashboard link: https://syzkaller.appspot.com/bug?extid=b107db66f49c5e2a911f compiler: Debian clang version 13.0.1-++20220126092033+75e33f71c2da-1~exp1~20220126212112.63, GNU ld (GNU Binutils for Debian) 2.35.2 userspace arch: arm64 Unfortunately, I don't have any reproducer for this issue yet. Downloadable assets: disk image: https://storage.googleapis.com/syzbot-assets/e8e91bc79312/disk-bbed346d.raw.xz vmlinux: https://storage.googleapis.com/syzbot-assets/c1cb3fb3b77e/vmlinux-bbed346d.xz IMPORTANT: if you fix the issue, please add the following tag to the commit: Reported-by: syzbot+b107db66f49c5e2a911f@xxxxxxxxxxxxxxxxxxxxxxxxx Unable to handle kernel paging request at virtual address fffffffffffffeb8 Mem abort info: ESR = 0x0000000096000004 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x04: level 0 translation fault Data abort info: ISV = 0, ISS = 0x00000004 CM = 0, WnR = 0 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000001c566b000 [fffffffffffffeb8] pgd=0000000000000000, p4d=0000000000000000 Internal error: Oops: 0000000096000004 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 7614 Comm: segctord Not tainted 6.0.0-rc7-syzkaller-18095-gbbed346d5a96 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/30/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : nilfs_mdt_fetch_dirty+0x1c/0x94 fs/nilfs2/mdt.c:394 lr : nilfs_mdt_fetch_dirty+0x18/0x94 fs/nilfs2/mdt.c:391 sp : ffff80001f553cc0 x29: ffff80001f553cc0 x28: 0000000000000000 x27: 0000000000000000 x26: 0000000000000001 x25: ffff00011b0cc800 x24: ffff00011b0cc800 x23: 0000000000000001 x22: 0000000000000001 x21: ffff00011b0cc800 x20: ffff00011b198900 x19: 0000000000000000 x18: 0000000000000107 x17: ffff80000bffd6bc x16: ffff80000db49158 x15: ffff00012640cf80 x14: 0000000000000008 x13: 00000000ffffffff x12: ffff00012640cf80 x11: ff80800008f55b48 x10: 0000000000000000 x9 : ffff800008f55b48 x8 : fffffffffffffeb8 x7 : ffff8000082160c0 x6 : 0000000000000000 x5 : 0000000000000080 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000006 x1 : ffff00011b198900 x0 : 0000000000000000 Call trace: nilfs_mdt_fetch_dirty+0x1c/0x94 fs/nilfs2/mdt.c:394 nilfs_test_metadata_dirty+0x2c/0x148 fs/nilfs2/segment.c:813 nilfs_segctor_confirm+0x30/0x1a8 fs/nilfs2/segment.c:837 nilfs_segctor_construct+0x78/0x380 fs/nilfs2/segment.c:2374 nilfs_segctor_thread_construct fs/nilfs2/segment.c:2483 [inline] nilfs_segctor_thread+0x180/0x660 fs/nilfs2/segment.c:2566 kthread+0x12c/0x158 kernel/kthread.c:376 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Code: 910003fd aa0003f3 97cd2834 d1052268 (f9400100) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 910003fd mov x29, sp 4: aa0003f3 mov x19, x0 8: 97cd2834 bl 0xffffffffff34a0d8 c: d1052268 sub x8, x19, #0x148 * 10: f9400100 ldr x0, [x8] <-- 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.
