loop0: detected capacity change from 0 to 64 Unable to handle kernel paging request at virtual address dfff800000000008 KASAN: null-ptr-deref in range [0x0000000000000040-0x0000000000000047] 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 [dfff800000000008] address between user and kernel address ranges Internal error: Oops: 0000000096000005 [#1] PREEMPT SMP Modules linked in: CPU: 1 PID: 6095 Comm: syz-executor180 Not tainted 6.7.0-rc4-syzkaller-gd46efae31672 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/10/2023 pstate: 80400005 (Nzcv daif +PAN -UAO -TCO -DIT -SSBS BTYPE=--) pc : hfs_find_init+0x6c/0x1c8 fs/hfs/bfind.c:21 lr : hfs_find_init+0x30/0x1c8 fs/hfs/bfind.c:16 sp : ffff800096d36f70 x29: ffff800096d36f70 x28: ffff700012da6e04 x27: 0000000000000004 x26: ffff0000d8938180 x25: 0000000000000008 x24: dfff800000000000 x23: ffff0000d893814c x22: ffff800096d37058 x21: 0000000000000040 x20: ffff800096d37040 x19: 0000000000000000 x18: ffff800096d36aa0 x17: 000000000000c54a x16: ffff80008a776a00 x15: 0000000000000007 x14: 1ffff00012da6e08 x13: 0000000000000000 x12: 0000000000000000 x11: ffff700012da6e0f x10: 0000000000ff0100 x9 : 0000000000000000 x8 : 0000000000000000 x7 : 0000000000000000 x6 : 0000000000000000 x5 : ffff800091bd0848 x4 : 0000000000000000 x3 : 0000000000000030 x2 : 0000000000000008 x1 : ffff800096d37040 x0 : ffff800096d37050 Call trace: hfs_find_init+0x6c/0x1c8 fs/hfs/bfind.c:21 hfs_ext_read_extent fs/hfs/extent.c:200 [inline] hfs_get_block+0x29c/0x9e0 fs/hfs/extent.c:366 block_read_full_folio+0x430/0xcdc fs/buffer.c:2399 hfs_read_folio+0x28/0x38 fs/hfs/inode.c:39 filemap_read_folio+0x14c/0x39c mm/filemap.c:2323 do_read_cache_folio+0x114/0x548 mm/filemap.c:3691 do_read_cache_page mm/filemap.c:3757 [inline] read_cache_page+0x6c/0x15c mm/filemap.c:3766 read_mapping_page include/linux/pagemap.h:871 [inline] hfs_btree_open+0x440/0x1010 fs/hfs/btree.c:78 hfs_mdb_get+0x10cc/0x1c2c fs/hfs/mdb.c:199 hfs_fill_super+0xd64/0x13b4 fs/hfs/super.c:406 mount_bdev+0x1e8/0x2b4 fs/super.c:1650 hfs_mount+0x44/0x58 fs/hfs/super.c:456 legacy_get_tree+0xd4/0x16c fs/fs_context.c:662 vfs_get_tree+0x90/0x288 fs/super.c:1771 do_new_mount+0x25c/0x8c8 fs/namespace.c:3337 path_mount+0x590/0xe04 fs/namespace.c:3664 do_mount fs/namespace.c:3677 [inline] __do_sys_mount fs/namespace.c:3886 [inline] __se_sys_mount fs/namespace.c:3863 [inline] __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3863 __invoke_syscall arch/arm64/kernel/syscall.c:37 [inline] invoke_syscall+0x98/0x2b8 arch/arm64/kernel/syscall.c:51 el0_svc_common+0x130/0x23c arch/arm64/kernel/syscall.c:136 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:155 el0_svc+0x54/0x158 arch/arm64/kernel/entry-common.c:678 el0t_64_sync_handler+0x84/0xfc arch/arm64/kernel/entry-common.c:696 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:595 Code: 97e2f38b 91010275 f90002df d343feb9 (38f86b28) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: 97e2f38b bl 0xffffffffff8bce2c 4: 91010275 add x21, x19, #0x40 8: f90002df str xzr, [x22] c: d343feb9 lsr x25, x21, #3 * 10: 38f86b28 ldrsb w8, [x25, x24] <-- trapping instruction