Unable to handle kernel paging request at virtual address dfff800000000006 KASAN: null-ptr-deref in range [0x0000000000000030-0x0000000000000037] 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 [dfff800000000006] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4312 Comm: syz-executor286 Not tainted 6.1.21-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/02/2023 pstate: 60400005 (nZCv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] pc : lmLogSync+0x210/0x978 fs/jfs/jfs_logmgr.c:937 lr : write_special_inodes fs/jfs/jfs_logmgr.c:207 [inline] lr : lmLogSync+0x1ec/0x978 fs/jfs/jfs_logmgr.c:937 sp : ffff80001d9c7700 x29: ffff80001d9c77d0 x28: 1ffff00002aafaa9 x27: dfff800000000000 x26: 0000000000000002 x25: ffff80001d9c7720 x24: 1fffe0001b02e406 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000030 x20: ffff0000c08bf838 x19: ffff0000dcf9c800 x18: 1fffe000368bab76 x17: ffff80001557d000 x16: ffff800012023c80 x15: 0000000000000000 x14: 1ffff00002ab00b0 x13: dfff800000000000 x12: 0000000000000003 x11: ff8080000873b104 x10: 0000000000000000 x9 : 72011f6c8a253100 x8 : 0000000000000006 x7 : 0000000000000000 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000010 x2 : 0000000000000008 x1 : 0000000000000000 x0 : 0000000000000000 Call trace: write_special_inodes fs/jfs/jfs_logmgr.c:208 [inline] lmLogSync+0x210/0x978 fs/jfs/jfs_logmgr.c:937 jfs_syncpt+0x74/0x98 fs/jfs/jfs_logmgr.c:1041 jfs_sync_fs+0x8c/0xac fs/jfs/super.c:685 sync_filesystem+0xe8/0x218 fs/sync.c:56 generic_shutdown_super+0x70/0x328 fs/super.c:474 kill_block_super+0x70/0xdc fs/super.c:1441 deactivate_locked_super+0xac/0x124 fs/super.c:332 deactivate_super+0xf0/0x110 fs/super.c:363 cleanup_mnt+0x394/0x41c fs/namespace.c:1186 __cleanup_mnt+0x20/0x30 fs/namespace.c:1193 task_work_run+0x240/0x2f0 kernel/task_work.c:179 resume_user_mode_work include/linux/resume_user_mode.h:49 [inline] do_notify_resume+0x2144/0x3470 arch/arm64/kernel/signal.c:1132 prepare_exit_to_user_mode arch/arm64/kernel/entry-common.c:137 [inline] exit_to_user_mode arch/arm64/kernel/entry-common.c:142 [inline] el0_svc+0x9c/0x168 arch/arm64/kernel/entry-common.c:638 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:581 Code: 97bef81a f94002a8 9100c115 d343fea8 (387b6908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97bef81a bl 0xfffffffffefbe068 4: f94002a8 ldr x8, [x21] 8: 9100c115 add x21, x8, #0x30 c: d343fea8 lsr x8, x21, #3 * 10: 387b6908 ldrb w8, [x8, x27] <-- trapping instruction