BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE (0x1)
BTRFS info (device loop0): clearing compat-ro feature flag for FREE_SPACE_TREE_VALID (0x2)
==================================================================
BUG: KASAN: slab-out-of-bounds in strlen+0x54/0x70 lib/string.c:403
Read of size 1 at addr ffff0000cd064a28 by task syz-executor.0/6627

CPU: 0 PID: 6627 Comm: syz-executor.0 Not tainted 6.8.0-rc2-syzkaller-g41bccc98fb79 #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/17/2023
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:291
 show_stack+0x2c/0x3c arch/arm64/kernel/stacktrace.c:298
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:488
 kasan_report+0xd8/0x138 mm/kasan/report.c:601
 __asan_report_load1_noabort+0x20/0x2c mm/kasan/report_generic.c:378
 strlen+0x54/0x70 lib/string.c:403
 getname_kernel+0x2c/0x2d8 fs/namei.c:226
 kern_path+0x2c/0x6c fs/namei.c:2618
 lookup_bdev block/bdev.c:1014 [inline]
 bdev_open_by_path+0xcc/0x394 block/bdev.c:939
 btrfs_init_dev_replace_tgtdev fs/btrfs/dev-replace.c:260 [inline]
 btrfs_dev_replace_start fs/btrfs/dev-replace.c:636 [inline]
 btrfs_dev_replace_by_ioctl+0x2e4/0x19b0 fs/btrfs/dev-replace.c:745
 btrfs_ioctl_dev_replace+0x348/0x408 fs/btrfs/ioctl.c:3315
 btrfs_ioctl+0xa28/0xb08 fs/btrfs/ioctl.c:4699
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
 __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:598

Allocated by task 6627:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x40/0x78 mm/kasan/common.c:68
 kasan_save_alloc_info+0x70/0x84 mm/kasan/generic.c:626
 poison_kmalloc_redzone mm/kasan/common.c:372 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:389
 kasan_kmalloc include/linux/kasan.h:211 [inline]
 __do_kmalloc_node mm/slub.c:3981 [inline]
 __kmalloc_node_track_caller+0x2f8/0x620 mm/slub.c:4001
 memdup_user+0x4c/0x1f8 mm/util.c:197
 btrfs_ioctl_dev_replace+0xa4/0x408 fs/btrfs/ioctl.c:3302
 btrfs_ioctl+0xa28/0xb08 fs/btrfs/ioctl.c:4699
 vfs_ioctl fs/ioctl.c:51 [inline]
 __do_sys_ioctl fs/ioctl.c:871 [inline]
 __se_sys_ioctl fs/ioctl.c:857 [inline]
 __arm64_sys_ioctl+0x14c/0x1c8 fs/ioctl.c:857
 __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:598

The buggy address belongs to the object at ffff0000cd064000
 which belongs to the cache kmalloc-4k of size 4096
The buggy address is located 0 bytes to the right of
 allocated 2600-byte region [ffff0000cd064000, ffff0000cd064a28)

The buggy address belongs to the physical page:
page:00000000998480bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10d060
head:00000000998480bc order:3 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x5ffc00000000840(slab|head|node=0|zone=2|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 05ffc00000000840 ffff0000c0002140 dead000000000122 0000000000000000
raw: 0000000000000000 0000000080040004 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000cd064900: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000cd064980: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000cd064a00: 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc fc
                                  ^
 ffff0000cd064a80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000cd064b00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
BTRFS error (device loop0): target device test     : passed
internal     : no
type         : skcipher
async        : no
blocksize    : 16
min keysize  : 32
max keysize  : 64
ivsize       : 16
chunksize    : 16
walksize     : 128
statesize    : 0

name         : ctr(aes)
driver       : ctr-aes-neonbs
module       : kernel
priority     : 250
refcnt       : 1
selftest     : passed
internal     : no
type         : skcipher
async        : no
blocksize    : 1
min keysize  : 16
max keysize  : 32
ivsize       : 16
chunksize    : 16
walksize     : 128
statesize    : 0

name         : cbc(aes)
driver       : cbc-aes-neonbs
module       : kernel
priority     : 250
refcnt       : 1
selftest     : passed
internal     : no
type         : skcipher
async        : no
blocksize    : 16
min keysize  : 16
max keysize  : 32
ivsize       : 16
chunksize    : 16
walksize     : 128
statesize    : 0

name         : ecb(aes)
driver       : ecb-aes-neonbs