Unable to handle kernel paging request at virtual address dfff800000000003 KASAN: null-ptr-deref in range [0x0000000000000018-0x000000000000001f] 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 [dfff800000000003] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 UID: 0 PID: 2144 Comm: kworker/u8:9 Not tainted 6.11.0-rc7-syzkaller-g5f5673607153 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 08/06/2024 Workqueue: events_unbound btrfs_async_reclaim_metadata_space pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : backup_super_roots fs/btrfs/disk-io.c:1691 [inline] pc : write_all_supers+0x9a0/0x38d0 fs/btrfs/disk-io.c:4041 lr : lowmem_page_address include/linux/mm.h:2262 [inline] lr : folio_address include/linux/mm.h:2273 [inline] lr : btrfs_header_level fs/btrfs/accessors.h:688 [inline] lr : backup_super_roots fs/btrfs/disk-io.c:1689 [inline] lr : write_all_supers+0x8e0/0x38d0 fs/btrfs/disk-io.c:4041 sp : ffff80009fd471c0 x29: ffff80009fd47560 x28: ffff0000d0d8ab2b x27: dfff800000000000 x26: 0000000000000003 x25: ffff0000d0d8abc5 x24: ffff0000db6606a8 x23: 0000000000000000 x22: 0000000000000009 x21: dfff800000000000 x20: dfff800000000000 x19: 0000000000000018 x18: ffff80009fd46da0 x17: 000000000003eb40 x16: ffff80008029c560 x15: 0000000000000001 x14: 1fffe0001b6cc00d x13: 0000000000000000 x12: 0000000000000000 x11: 0000000000000001 x10: 1fffe0001a78930c x9 : 0000000000000000 x8 : 0000000000000000 x7 : ffff80008223e800 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : ffff800080361120 x2 : 0000000000000001 x1 : 0000000000000000 x0 : ffff0000d3c49980 Call trace: backup_super_roots fs/btrfs/disk-io.c:1691 [inline] write_all_supers+0x9a0/0x38d0 fs/btrfs/disk-io.c:4041 btrfs_commit_transaction+0x1af0/0x2ba4 fs/btrfs/transaction.c:2530 btrfs_commit_current_transaction+0xac/0xdc fs/btrfs/transaction.c:2008 flush_space+0x3ac/0xc50 fs/btrfs/space-info.c:835 btrfs_async_reclaim_metadata_space+0x5d4/0x71c fs/btrfs/space-info.c:1106 process_one_work+0x79c/0x15b8 kernel/workqueue.c:3231 process_scheduled_works kernel/workqueue.c:3312 [inline] worker_thread+0x978/0xec4 kernel/workqueue.c:3389 kthread+0x288/0x310 kernel/kthread.c:389 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:860 Code: d2d00014 f2fbfff4 91006113 d343fe7a (38756b48) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d2d00014 mov x20, #0x800000000000 // #140737488355328 4: f2fbfff4 movk x20, #0xdfff, lsl #48 8: 91006113 add x19, x8, #0x18 c: d343fe7a lsr x26, x19, #3 * 10: 38756b48 ldrb w8, [x26, x21] <-- trapping instruction