loop0: detected capacity change from 0 to 64 Unable to handle kernel NULL pointer dereference at virtual address 0000000000000040 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 user pgtable: 4k pages, 48-bit VAs, pgdp=000000010cf96000 [0000000000000040] pgd=08000001063e3003, p4d=08000001063e3003, pud=0800000106b86003, pmd=0000000000000000 Internal error: Oops: 0000000096000006 [#1] PREEMPT SMP Modules linked in: CPU: 0 PID: 3072 Comm: syz-executor214 Not tainted 6.1.0-rc8-syzkaller-33330-ga5541c0811a0 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/26/2022 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : hfs_find_init+0x20/0xcc fs/hfs/bfind.c:21 lr : hfs_find_init+0x1c/0xcc fs/hfs/bfind.c:16 sp : ffff80000fba36c0 x29: ffff80000fba36c0 x28: ffff0000c9c90000 x27: 0000000000000004 x26: ffff0000c7b9e000 x25: 0000000000000000 x24: 0000000000000000 x23: 0000000000000004 x22: ffff0000c9c90090 x21: 0000000000000004 x20: ffff80000fba36f0 x19: 0000000000000000 x18: 00000000000000c0 x17: ffff80000dda8198 x16: ffff80000dbe6158 x15: ffff0000c93d0000 x14: 0000000000000018 x13: 0000000000000001 x12: ffff0000c93d0000 x11: ff808000088fbf94 x10: 0000000000000000 x9 : ffff8000088fbf94 x8 : ffff0000c93d0000 x7 : 0000000000000008 x6 : ffff80000801154c x5 : ffff80000e0b3f90 x4 : 0000000000000008 x3 : ffff80000dc2e0c8 x2 : ffff0000c93d0000 x1 : ffff80000fba36f0 x0 : 0000000000000000 Call trace: hfs_find_init+0x20/0xcc fs/hfs/bfind.c:19 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_get_block+0x23c/0x4c4 fs/hfs/extent.c:366 block_read_full_folio+0x188/0x8c0 fs/buffer.c:2271 hfs_read_folio+0x28/0x38 fs/hfs/inode.c:39 filemap_read_folio+0xc4/0x468 mm/filemap.c:2407 do_read_cache_folio+0x1c8/0x588 mm/filemap.c:3534 do_read_cache_page mm/filemap.c:3576 [inline] read_cache_page+0x40/0x174 mm/filemap.c:3585 read_mapping_page include/linux/pagemap.h:756 [inline] hfs_btree_open+0x1c4/0x594 fs/hfs/btree.c:78 hfs_mdb_get+0x5a8/0x7e8 fs/hfs/mdb.c:199 hfs_fill_super+0x59c/0x88c fs/hfs/super.c:406 mount_bdev+0x1b8/0x210 fs/super.c:1401 hfs_mount+0x44/0x58 fs/hfs/super.c:456 legacy_get_tree+0x30/0x74 fs/fs_context.c:610 vfs_get_tree+0x40/0x140 fs/super.c:1531 do_new_mount+0x1dc/0x4e4 fs/namespace.c:3040 path_mount+0x358/0x890 fs/namespace.c:3370 do_mount fs/namespace.c:3383 [inline] __do_sys_mount fs/namespace.c:3591 [inline] __se_sys_mount fs/namespace.c:3568 [inline] __arm64_sys_mount+0x2c4/0x3c4 fs/namespace.c:3568 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall arch/arm64/kernel/syscall.c:52 [inline] el0_svc_common+0x138/0x220 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x48/0x140 arch/arm64/kernel/syscall.c:197 el0_svc+0x58/0x150 arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:584 Code: aa0103f4 aa0003f3 97e6aaa5 a9017e93 (b9404268) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: aa0103f4 mov x20, x1 4: aa0003f3 mov x19, x0 8: 97e6aaa5 bl 0xffffffffff9aaa9c c: a9017e93 stp x19, xzr, [x20, #16] * 10: b9404268 ldr w8, [x19, #64] <-- trapping instruction