Unable to handle kernel paging request at virtual address dfff800000000007 KASAN: null-ptr-deref in range [0x0000000000000038-0x000000000000003f] 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 [dfff800000000007] address between user and kernel address ranges Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 4494 Comm: syz.2.24 Not tainted syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 824000c5 (Nzcv daIF +PAN -UAO +TCO -DIT -SSBS BTYPE=--) pc : __lock_acquire+0xf4/0x6800 kernel/locking/lockdep.c:4919 lr : lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 sp : ffff800020c577c0 x29: ffff800020c579c0 x28: 0000000000000000 x27: 0000000000000001 x26: 0000000000000038 x25: 1ffff00002a42070 x24: 0000000000000000 x23: dfff800000000000 x22: 0000000000000000 x21: 0000000000000000 x20: ffff80000a1cf1f8 x19: 0000000000000000 x18: 0000000000000000 x17: ffff800018349000 x16: ffff80000804309c x15: ffff800017e2a000 x14: 0000000000000001 x13: 1fffe00019caa54c x12: 0000000000080000 x11: 0000000000001393 x10: ffff70000418af18 x9 : ffff0000d28bb780 x8 : 0000000000000007 x7 : ffff80000a1cf1f8 x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000001 x3 : 0000000000000000 x2 : 0000000000000000 x1 : 0000000000000000 x0 : 0000000000000038 Call trace: __lock_acquire+0xf4/0x6800 kernel/locking/lockdep.c:4919 lock_acquire+0x20c/0x63c kernel/locking/lockdep.c:5662 __raw_spin_lock include/linux/spinlock_api_smp.h:133 [inline] _raw_spin_lock+0x54/0x6c kernel/locking/spinlock.c:154 spin_lock include/linux/spinlock.h:351 [inline] gfs2_glock_dq+0x48/0x194 fs/gfs2/glock.c:1709 gfs2_glock_dq_uninit+0x30/0xe8 fs/gfs2/glock.c:1738 gfs2_seek_data+0x18c/0x260 fs/gfs2/inode.c:2109 gfs2_llseek+0x1cc/0x27c fs/gfs2/file.c:74 vfs_llseek fs/read_write.c:289 [inline] ksys_lseek fs/read_write.c:302 [inline] __do_sys_lseek fs/read_write.c:313 [inline] __se_sys_lseek fs/read_write.c:311 [inline] __arm64_sys_lseek+0x13c/0x1c0 fs/read_write.c:311 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2b4 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:140 do_el0_svc+0x58/0x130 arch/arm64/kernel/syscall.c:204 el0_svc+0x58/0x128 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x18c/0x190 arch/arm64/kernel/entry.S:585 Code: d0067ec8 b94bc108 340001c8 d343ff48 (38776908) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: d0067ec8 adrp x8, 0xcfda000 4: b94bc108 ldr w8, [x8, #3008] 8: 340001c8 cbz w8, 0x40 c: d343ff48 lsr x8, x26, #3 * 10: 38776908 ldrb w8, [x8, x23] <-- trapping instruction