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BUG: KASAN: slab-out-of-bounds in copy_page_from_iter_atomic+0x9ec/0x112c lib/iov_iter.c:815
Read of size 2048 at addr ffff0000e951b000 by task kworker/u4:2/39

CPU: 0 PID: 39 Comm: kworker/u4:2 Not tainted 6.3.0-rc7-syzkaller-00084-g14f8db1c0f9a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/30/2023
Workqueue: loop0 loop_workfn
Call trace:
 dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233
 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240
 __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:319 [inline]
 print_report+0x174/0x514 mm/kasan/report.c:430
 kasan_report+0xd4/0x130 mm/kasan/report.c:536
 kasan_check_range+0x264/0x2a4 mm/kasan/generic.c:187
 __asan_memcpy+0x3c/0x84 mm/kasan/shadow.c:105
 copy_page_from_iter_atomic+0x9ec/0x112c lib/iov_iter.c:815
 generic_perform_write+0x2fc/0x55c mm/filemap.c:3934
 __generic_file_write_iter+0x168/0x388 mm/filemap.c:4054
 generic_file_write_iter+0xb8/0x2b4 mm/filemap.c:4086
 do_iter_write+0x534/0x964 fs/read_write.c:861
 vfs_iter_write+0x88/0xac fs/read_write.c:902
 lo_write_bvec drivers/block/loop.c:249 [inline]
 lo_write_simple drivers/block/loop.c:271 [inline]
 do_req_filebacked drivers/block/loop.c:495 [inline]
 loop_handle_cmd drivers/block/loop.c:1888 [inline]
 loop_process_work+0x15e0/0x2534 drivers/block/loop.c:1923
 loop_workfn+0x54/0x68 drivers/block/loop.c:1947
 process_one_work+0x788/0x12d4 kernel/workqueue.c:2390
 worker_thread+0x8e0/0xfe8 kernel/workqueue.c:2537
 kthread+0x24c/0x2d4 kernel/kthread.c:376
 ret_from_fork+0x10/0x20 arch/arm64/kernel/entry.S:870

Allocated by task 6714:
 kasan_save_stack mm/kasan/common.c:45 [inline]
 kasan_set_track+0x4c/0x7c mm/kasan/common.c:52
 kasan_save_alloc_info+0x24/0x30 mm/kasan/generic.c:510
 ____kasan_kmalloc mm/kasan/common.c:374 [inline]
 __kasan_kmalloc+0xac/0xc4 mm/kasan/common.c:383
 kasan_kmalloc include/linux/kasan.h:196 [inline]
 __do_kmalloc_node mm/slab_common.c:967 [inline]
 __kmalloc+0xcc/0x1b8 mm/slab_common.c:980
 kmalloc include/linux/slab.h:584 [inline]
 hfsplus_read_wrapper+0x3ac/0xfcc fs/hfsplus/wrapper.c:178
 hfsplus_fill_super+0x2f0/0x166c fs/hfsplus/super.c:413
 mount_bdev+0x26c/0x368 fs/super.c:1380
 hfsplus_mount+0x44/0x58 fs/hfsplus/super.c:641
 legacy_get_tree+0xd4/0x16c fs/fs_context.c:610
 vfs_get_tree+0x90/0x274 fs/super.c:1510
 do_new_mount+0x25c/0x8c8 fs/namespace.c:3042
 path_mount+0x590/0xe04 fs/namespace.c:3372
 do_mount fs/namespace.c:3385 [inline]
 __do_sys_mount fs/namespace.c:3594 [inline]
 __se_sys_mount fs/namespace.c:3571 [inline]
 __arm64_sys_mount+0x45c/0x594 fs/namespace.c:3571
 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline]
 invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52
 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142
 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193
 el0_svc+0x4c/0x15c 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:591

The buggy address belongs to the object at ffff0000e951b000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 0 bytes inside of
 allocated 512-byte region [ffff0000e951b000, ffff0000e951b200)

The buggy address belongs to the physical page:
page:00000000f0d5fb60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x129518
head:00000000f0d5fb60 order:2 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x5ffc00000010200(slab|head|node=0|zone=2|lastcpupid=0x7ff)
raw: 05ffc00000010200 ffff0000c0002600 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff0000e951b100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff0000e951b180: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff0000e951b200: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
                   ^
 ffff0000e951b280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff0000e951b300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
==================================================================
wlan1: Created IBSS using preconfigured BSSID 50:50:50:50:50:50
wlan1: Creating new IBSS network, BSSID 50:50:50:50:50:50