loop0: detected capacity change from 0 to 1024 ------------[ cut here ]------------ WARNING: CPU: 0 PID: 6825 at ./include/linux/mm.h:2325 rcu_read_unlock_sched include/linux/rcupdate.h:981 [inline] WARNING: CPU: 0 PID: 6825 at ./include/linux/mm.h:2325 pfn_valid include/linux/mmzone.h:2189 [inline] WARNING: CPU: 0 PID: 6825 at ./include/linux/mm.h:2325 lowmem_page_address include/linux/mm.h:2325 [inline] WARNING: CPU: 0 PID: 6825 at ./include/linux/mm.h:2325 kmap_local_page+0x370/0x4ec include/linux/highmem-internal.h:188 Modules linked in: CPU: 0 UID: 0 PID: 6825 Comm: syz-executor.0 Not tainted syzkaller #0 PREEMPT Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 83400005 (Nzcv daif +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : lowmem_page_address include/linux/rcupdate.h:981 [inline] pc : kmap_local_page+0x370/0x4ec include/linux/highmem-internal.h:188 lr : rcu_read_unlock_sched include/linux/rcupdate.h:981 [inline] lr : pfn_valid include/linux/mmzone.h:2189 [inline] lr : lowmem_page_address include/linux/mm.h:2325 [inline] lr : kmap_local_page+0x370/0x4ec include/linux/highmem-internal.h:188 sp : ffff80009c786b50 x29: ffff80009c786b50 x28: ffff0000e2fb3040 x27: 1fffe00019ef7411 x26: ffff80008eec1000 x25: 1ffff00011dd8321 x24: dfff800000000000 x23: 0000020041000001 x22: 0000000000200000 x21: 0000000000000001 x20: 0000000000000000 x19: 0000000100000000 x18: 1fffe000337d4a90 x17: ffff80008f5ae000 x16: ffff800082defcc0 x15: 0000000000000001 x14: 1fffe00019cea251 x13: 0000000000000000 x12: 0000000000000000 x11: 000000004853a90d x10: 0000000000ff0100 x9 : 0000000000000000 x8 : ffff0000c1d10000 x7 : ffff80008130e73c x6 : 0000000000000000 x5 : 0000000000000000 x4 : 0000000000000000 x3 : 0000000000000002 x2 : 0000000000000008 x1 : 0000000100000000 x0 : 0000000000000000 Call trace: rcu_read_unlock_sched include/linux/rcupdate.h:981 [inline] (P) pfn_valid include/linux/mmzone.h:2189 [inline] (P) lowmem_page_address include/linux/mm.h:2325 [inline] (P) kmap_local_page+0x370/0x4ec include/linux/highmem-internal.h:188 (P) hfsplus_bnode_move+0x4a8/0xaf0 fs/hfsplus/bnode.c:274 hfsplus_brec_insert+0x528/0xaf4 fs/hfsplus/brec.c:128 hfsplus_create_attr+0x2f4/0x400 fs/hfsplus/attributes.c:252 __hfsplus_setxattr+0x920/0x1fb0 fs/hfsplus/xattr.c:358 hfsplus_initxattrs+0x18c/0x244 fs/hfsplus/xattr_security.c:59 security_inode_init_security+0x6dc/0x7f4 security/security.c:1891 hfsplus_init_security+0x40/0x54 fs/hfsplus/xattr_security.c:71 hfsplus_fill_super+0x1080/0x16fc fs/hfsplus/super.c:587 get_tree_bdev_flags+0x360/0x414 fs/super.c:1698 get_tree_bdev+0x2c/0x3c fs/super.c:1721 hfsplus_get_tree+0x28/0x38 fs/hfsplus/super.c:659 vfs_get_tree+0x90/0x28c fs/super.c:1758 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3642 [inline] do_new_mount+0x284/0x944 fs/namespace.c:3718 path_mount+0x5b4/0xdfc fs/namespace.c:4028 do_mount fs/namespace.c:4041 [inline] __do_sys_mount fs/namespace.c:4229 [inline] __se_sys_mount fs/namespace.c:4206 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4206 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 irq event stamp: 2576 hardirqs last enabled at (2575): [] __raw_spin_unlock_irqrestore include/linux/spinlock_api_smp.h:151 [inline] hardirqs last enabled at (2575): [] _raw_spin_unlock_irqrestore+0x38/0x98 kernel/locking/spinlock.c:194 hardirqs last disabled at (2576): [] el1_brk64+0x20/0x54 arch/arm64/kernel/entry-common.c:412 softirqs last enabled at (1896): [] local_bh_enable+0x10/0x34 include/linux/bottom_half.h:32 softirqs last disabled at (1894): [] local_bh_disable+0x10/0x34 include/linux/bottom_half.h:19 ---[ end trace 0000000000000000 ]--- ================================================================== BUG: KASAN: out-of-bounds in hfsplus_bnode_move+0x4e8/0xaf0 fs/hfsplus/bnode.c:285 Read of size 18446744073709551602 at addr ffff80100000104e by task syz-executor.0/6825 CPU: 0 UID: 0 PID: 6825 Comm: syz-executor.0 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 Call trace: show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:499 (C) __dump_stack+0x30/0x40 lib/dump_stack.c:94 dump_stack_lvl+0xd8/0x12c lib/dump_stack.c:120 print_address_description+0xa8/0x238 mm/kasan/report.c:378 print_report+0x68/0x84 mm/kasan/report.c:482 kasan_report+0xb0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:200 __asan_memmove+0x3c/0x84 mm/kasan/shadow.c:94 hfsplus_bnode_move+0x4e8/0xaf0 fs/hfsplus/bnode.c:285 hfsplus_brec_insert+0x528/0xaf4 fs/hfsplus/brec.c:128 hfsplus_create_attr+0x2f4/0x400 fs/hfsplus/attributes.c:252 __hfsplus_setxattr+0x920/0x1fb0 fs/hfsplus/xattr.c:358 hfsplus_initxattrs+0x18c/0x244 fs/hfsplus/xattr_security.c:59 security_inode_init_security+0x6dc/0x7f4 security/security.c:1891 hfsplus_init_security+0x40/0x54 fs/hfsplus/xattr_security.c:71 hfsplus_fill_super+0x1080/0x16fc fs/hfsplus/super.c:587 get_tree_bdev_flags+0x360/0x414 fs/super.c:1698 get_tree_bdev+0x2c/0x3c fs/super.c:1721 hfsplus_get_tree+0x28/0x38 fs/hfsplus/super.c:659 vfs_get_tree+0x90/0x28c fs/super.c:1758 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3642 [inline] do_new_mount+0x284/0x944 fs/namespace.c:3718 path_mount+0x5b4/0xdfc fs/namespace.c:4028 do_mount fs/namespace.c:4041 [inline] __do_sys_mount fs/namespace.c:4229 [inline] __se_sys_mount fs/namespace.c:4206 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4206 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 The buggy address belongs to a vmalloc virtual mapping Memory state around the buggy address: Unable to handle kernel paging request at virtual address ffff7002000001e0 KASAN: probably wild-memory-access in range [0xffff801000000f00-0xffff801000000f07] 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 swapper pgtable: 4k pages, 48-bit VAs, pgdp=00000002070a1000 [ffff7002000001e0] pgd=0000000000000000, p4d=000000023ea66003, pud=0000000000000000 Internal error: Oops: 0000000096000005 [#1] SMP Modules linked in: CPU: 0 UID: 0 PID: 6825 Comm: syz-executor.0 Tainted: G W syzkaller #0 PREEMPT Tainted: [W]=WARN Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 10/03/2025 pstate: 634000c5 (nZCv daIF +PAN -UAO +TCO +DIT -SSBS BTYPE=--) pc : __pi_memcpy_generic+0x24/0x22c arch/arm64/lib/memcpy.S:71 lr : kasan_metadata_fetch_row+0x20/0x2c mm/kasan/report_generic.c:186 sp : ffff80009c786a20 x29: ffff80009c786a20 x28: ffff0000e2fb3040 x27: 1fffe00019ef7411 x26: fffffffffffffff8 x25: ffff801000001040 x24: 00000000fffffff2 x23: 0000000000000000 x22: ffff801000000f00 x21: ffff000000000000 x20: ffff801000001000 x19: ffff80100000104e x18: 1fffe000337d4a90 x17: 6e69676e45206574 x16: ffff80008ad6b188 x15: 0000000000000001 x14: 0000000000000001 x13: 0000000000000000 x12: 0000000000000000 x11: ffff7000138f0d4c x10: 0000000000ff0100 x9 : 0b852eb559fae600 x8 : dfff800000000000 x7 : 0000000000000000 x6 : 000000000000003a x5 : ffff80009c786a48 x4 : ffff7002000001f0 x3 : ffff80008add506c x2 : 0000000000000010 x1 : ffff7002000001e0 x0 : ffff80009c786a38 Call trace: __pi_memcpy_generic+0x24/0x22c arch/arm64/lib/memcpy.S:70 (P) print_memory_metadata+0x60/0x310 mm/kasan/report.c:458 print_report+0x70/0x84 mm/kasan/report.c:483 kasan_report+0xb0/0x110 mm/kasan/report.c:595 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:200 __asan_memmove+0x3c/0x84 mm/kasan/shadow.c:94 hfsplus_bnode_move+0x4e8/0xaf0 fs/hfsplus/bnode.c:285 hfsplus_brec_insert+0x528/0xaf4 fs/hfsplus/brec.c:128 hfsplus_create_attr+0x2f4/0x400 fs/hfsplus/attributes.c:252 __hfsplus_setxattr+0x920/0x1fb0 fs/hfsplus/xattr.c:358 hfsplus_initxattrs+0x18c/0x244 fs/hfsplus/xattr_security.c:59 security_inode_init_security+0x6dc/0x7f4 security/security.c:1891 hfsplus_init_security+0x40/0x54 fs/hfsplus/xattr_security.c:71 hfsplus_fill_super+0x1080/0x16fc fs/hfsplus/super.c:587 get_tree_bdev_flags+0x360/0x414 fs/super.c:1698 get_tree_bdev+0x2c/0x3c fs/super.c:1721 hfsplus_get_tree+0x28/0x38 fs/hfsplus/super.c:659 vfs_get_tree+0x90/0x28c fs/super.c:1758 fc_mount fs/namespace.c:1199 [inline] do_new_mount_fc fs/namespace.c:3642 [inline] do_new_mount+0x284/0x944 fs/namespace.c:3718 path_mount+0x5b4/0xdfc fs/namespace.c:4028 do_mount fs/namespace.c:4041 [inline] __do_sys_mount fs/namespace.c:4229 [inline] __se_sys_mount fs/namespace.c:4206 [inline] __arm64_sys_mount+0x3e8/0x468 fs/namespace.c:4206 __invoke_syscall arch/arm64/kernel/syscall.c:35 [inline] invoke_syscall+0x98/0x254 arch/arm64/kernel/syscall.c:49 el0_svc_common+0xe8/0x23c arch/arm64/kernel/syscall.c:132 do_el0_svc+0x48/0x58 arch/arm64/kernel/syscall.c:151 el0_svc+0x5c/0x254 arch/arm64/kernel/entry-common.c:724 el0t_64_sync_handler+0x84/0x12c arch/arm64/kernel/entry-common.c:743 el0t_64_sync+0x198/0x19c arch/arm64/kernel/entry.S:596 Code: f100805f 540003c8 f100405f 540000c3 (a9401c26) ---[ end trace 0000000000000000 ]--- ---------------- Code disassembly (best guess): 0: f100805f cmp x2, #0x20 4: 540003c8 b.hi 0x7c // b.pmore 8: f100405f cmp x2, #0x10 c: 540000c3 b.cc 0x24 // b.lo, b.ul, b.last * 10: a9401c26 ldp x6, x7, [x1] <-- trapping instruction