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BUG: KASAN: slab-out-of-bounds in memcpy include/linux/fortify-string.h:191 [inline]
BUG: KASAN: slab-out-of-bounds in skb_put_data include/linux/skbuff.h:2297 [inline]
BUG: KASAN: slab-out-of-bounds in qrtr_endpoint_post+0x5c0/0x11b0 net/qrtr/qrtr.c:503
Read of size 4294967295 at addr ffff888145c3e520 by task syz-executor.0/13379

CPU: 1 PID: 13379 Comm: syz-executor.0 Not tainted 5.13.0-rc1-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011
Call Trace:
 __dump_stack lib/dump_stack.c:79 [inline]
 dump_stack+0x141/0x1d7 lib/dump_stack.c:120
 print_address_description.constprop.0.cold+0x5b/0x2f8 mm/kasan/report.c:233
 __kasan_report mm/kasan/report.c:419 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:436
 check_region_inline mm/kasan/generic.c:180 [inline]
 kasan_check_range+0x13d/0x180 mm/kasan/generic.c:186
 memcpy+0x20/0x60 mm/kasan/shadow.c:65
 memcpy include/linux/fortify-string.h:191 [inline]
 skb_put_data include/linux/skbuff.h:2297 [inline]
 qrtr_endpoint_post+0x5c0/0x11b0 net/qrtr/qrtr.c:503
 qrtr_tun_write_iter+0x11f/0x1a0 net/qrtr/tun.c:108
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write+0x426/0x650 fs/read_write.c:518
 vfs_write+0x796/0xa30 fs/read_write.c:605
 ksys_write+0x12d/0x250 fs/read_write.c:658
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x4665f9
Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ff46c148188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 00000000004665f9
RDX: 0000000000000020 RSI: 0000000020000080 RDI: 0000000000000006
RBP: 00000000004bfce1 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 00007fff1c926f2f R14: 00007ff46c148300 R15: 0000000000022000

Allocated by task 13379:
 kasan_save_stack+0x1b/0x40 mm/kasan/common.c:38
 kasan_set_track mm/kasan/common.c:46 [inline]
 set_alloc_info mm/kasan/common.c:428 [inline]
 ____kasan_kmalloc mm/kasan/common.c:507 [inline]
 ____kasan_kmalloc mm/kasan/common.c:466 [inline]
 __kasan_kmalloc+0x9b/0xd0 mm/kasan/common.c:516
 kmalloc include/linux/slab.h:561 [inline]
 kzalloc include/linux/slab.h:686 [inline]
 qrtr_tun_write_iter+0xbd/0x1a0 net/qrtr/tun.c:99
 call_write_iter include/linux/fs.h:2114 [inline]
 new_sync_write+0x426/0x650 fs/read_write.c:518
 vfs_write+0x796/0xa30 fs/read_write.c:605
 ksys_write+0x12d/0x250 fs/read_write.c:658
 do_syscall_64+0x3a/0xb0 arch/x86/entry/common.c:47
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff888145c3e500
 which belongs to the cache kmalloc-32 of size 32
The buggy address is located 0 bytes to the right of
 32-byte region [ffff888145c3e500, ffff888145c3e520)
The buggy address belongs to the page:
page:ffffea0005170f80 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145c3e
flags: 0x57ff00000000200(slab|node=1|zone=2|lastcpupid=0x7ff)
raw: 057ff00000000200 ffffea000060a080 0000001600000016 ffff888011041500
raw: 0000000000000000 0000000080400040 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x12cc0(GFP_KERNEL|__GFP_NOWARN|__GFP_NORETRY), pid 1, ts 7176553045, free_ts 0
 prep_new_page mm/page_alloc.c:2358 [inline]
 get_page_from_freelist+0x1033/0x2b60 mm/page_alloc.c:3994
 __alloc_pages+0x1b2/0x500 mm/page_alloc.c:5200
 alloc_page_interleave+0x1e/0x1d0 mm/mempolicy.c:2147
 alloc_pages+0x238/0x2a0 mm/mempolicy.c:2270
 alloc_slab_page mm/slub.c:1644 [inline]
 allocate_slab+0x2c5/0x4c0 mm/slub.c:1784
 new_slab mm/slub.c:1847 [inline]
 new_slab_objects mm/slub.c:2593 [inline]
 ___slab_alloc+0x44c/0x7a0 mm/slub.c:2756
 __slab_alloc.constprop.0+0xa7/0xf0 mm/slub.c:2796
 slab_alloc_node mm/slub.c:2878 [inline]
 slab_alloc mm/slub.c:2920 [inline]
 __kmalloc+0x315/0x330 mm/slub.c:4063
 kmalloc include/linux/slab.h:561 [inline]
 kzalloc include/linux/slab.h:686 [inline]
 kobject_get_path+0xbe/0x230 lib/kobject.c:179
 kobject_uevent_env+0x265/0x1650 lib/kobject_uevent.c:529
 device_add+0xb71/0x2100 drivers/base/core.c:3300
 device_create_groups_vargs+0x203/0x280 drivers/base/core.c:3978
 device_create+0xdf/0x120 drivers/base/core.c:4020
 bdi_register_va.part.0+0x9c/0x800 mm/backing-dev.c:809
 bdi_register_va mm/backing-dev.c:844 [inline]
 bdi_register+0x12a/0x140 mm/backing-dev.c:841
 __device_add_disk+0xe62/0x1230 block/genhd.c:550
page_owner free stack trace missing

Memory state around the buggy address:
 ffff888145c3e400: 00 00 00 01 fc fc fc fc fa fb fb fb fc fc fc fc
 ffff888145c3e480: 00 00 00 07 fc fc fc fc fa fb fb fb fc fc fc fc
>ffff888145c3e500: 00 00 00 00 fc fc fc fc 00 00 00 07 fc fc fc fc
                               ^
 ffff888145c3e580: fa fb fb fb fc fc fc fc 00 00 00 07 fc fc fc fc
 ffff888145c3e600: fa fb fb fb fc fc fc fc fa fb fb fb fc fc fc fc
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