Unable to handle kernel paging request at virtual address dfff800000000006 KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] Mem abort info: ESR = 0x0000000096000005 EC = 0x25: DABT (current EL), IL = 32 bits SET = 0, FnV = 0 EA = 0, S1PTW = 0 FSC = 0x05: level 1 translation fault Data abort info: ISV = 0, ISS = 0x00000005, ISS2 = 0x00000000 CM = 0, WnR = 0, TnD = 0, TagAccess = 0 GCS = 0, Overlay = 0, DirtyBit = 0, Xs = 0 [dfff800000000006] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 5996 Comm: syz-executor184 Not tainted 6.4.0-rc5-syzkaller-gd8b213732169 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 05/25/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] pc : jfs_flush_journal+0x6a4/0xd64 fs/jfs/jfs_logmgr.c:1573 lr : write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] lr : jfs_flush_journal+0x680/0xd64 fs/jfs/jfs_logmgr.c:1573 sp : ffff8000966e7640 x29: ffff8000966e7730 x28: dfff800000000000 x27: ffff0000e0f57330 x26: 1fffe0001b3b0c35 x25: 1fffe0001b3b0c00 x24: ffff0000d9d86000 x23: ffff0000d9d861b8 x22: 0000000000000030 x21: ffff0000c6360c38 x20: ffff0000d9d861a8 x19: ffff0000d9d86000 x18: 1fffe000368447c6 x17: ffff80008debd000 x16: ffff80008a389100 x15: 0000000000000002 x14: 1ffff00011bd80ac x13: dfff800000000000 x12: 0000000000000003 x11: 0000000000000000 x10: 0000000000000000 x9 : 9746a87b1ab4d600 x8 : 0000000000000006 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000001 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] jfs_flush_journal+0x6a4/0xd64 fs/jfs/jfs_logmgr.c:1573 jfs_umount+0x148/0x360 fs/jfs/jfs_umount.c:58 jfs_put_super+0x90/0x188 fs/jfs/super.c:194 generic_shutdown_super+0x130/0x328 fs/super.c:500 kill_block_super+0x70/0xdc fs/super.c:1407 deactivate_locked_super+0xac/0x124 fs/super.c:331 deactivate_super+0xe0/0x100 fs/super.c:362 cleanup_mnt+0x34c/0x3dc fs/namespace.c:1177 __cleanup_mnt+0x20/0x30 fs/namespace.c:1184 task_work_run+0x230/0x2e0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2180/0x3c90 arch/arm64/kernel/signal.c:1305 exit_to_user_mode_prepare arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:144 [inline] el0_svc+0x94/0x160 arch/arm64/kernel/entry-common.c:648 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:665 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 Code: 97be428c f94002c8 9100c116 d343fec8 (387c6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97be428c bl 0xfffffffffef90a30 4: f94002c8 ldr x8, [x22] 8: 9100c116 add x22, x8, #0x30 c: d343fec8 lsr x8, x22, #3 * 10: 387c6908 ldrb w8, [x8, x28] <-- trapping instruction