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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:2293 [inline]
BUG: KASAN: slab-out-of-bounds in qrtr_endpoint_post+0x5c0/0x11b0 net/qrtr/qrtr.c:499
Read of size 4294967294 at addr ffff88801cbe2210 by task syz-executor.3/17465

CPU: 1 PID: 17465 Comm: syz-executor.3 Not tainted 5.12.0-rc4-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:232
 __kasan_report mm/kasan/report.c:399 [inline]
 kasan_report.cold+0x7c/0xd8 mm/kasan/report.c:416
 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:2293 [inline]
 qrtr_endpoint_post+0x5c0/0x11b0 net/qrtr/qrtr.c:499
 qrtr_tun_write_iter+0x11f/0x1a0 net/qrtr/tun.c:108
 call_write_iter include/linux/fs.h:1977 [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+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae
RIP: 0033:0x466459
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:00007fa74014d188 EFLAGS: 00000246 ORIG_RAX: 0000000000000001
RAX: ffffffffffffffda RBX: 000000000056bf60 RCX: 0000000000466459
RDX: 0000000000000010 RSI: 00000000200003c0 RDI: 0000000000000004
RBP: 00000000004bf9fb R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 000000000056bf60
R13: 0000000000a9fb1f R14: 00007fa74014d300 R15: 0000000000022000

Allocated by task 17465:
 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:427 [inline]
 ____kasan_kmalloc mm/kasan/common.c:506 [inline]
 ____kasan_kmalloc mm/kasan/common.c:465 [inline]
 __kasan_kmalloc+0x99/0xc0 mm/kasan/common.c:515
 kmalloc include/linux/slab.h:559 [inline]
 kzalloc include/linux/slab.h:684 [inline]
 qrtr_tun_write_iter+0xbd/0x1a0 net/qrtr/tun.c:99
 call_write_iter include/linux/fs.h:1977 [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+0x2d/0x70 arch/x86/entry/common.c:46
 entry_SYSCALL_64_after_hwframe+0x44/0xae

The buggy address belongs to the object at ffff88801cbe2200
 which belongs to the cache kmalloc-16 of size 16
The buggy address is located 0 bytes to the right of
 16-byte region [ffff88801cbe2200, ffff88801cbe2210)
The buggy address belongs to the page:
page:ffffea000072f880 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1cbe2
flags: 0xfff00000000200(slab)
raw: 00fff00000000200 ffffea00004a2040 0000001800000018 ffff8880108413c0
raw: 0000000000000000 0000000080800080 00000001ffffffff 0000000000000000
page dumped because: kasan: bad access detected

Memory state around the buggy address:
 ffff88801cbe2100: 00 00 fc fc fa fb fc fc fb fb fc fc fa fb fc fc
 ffff88801cbe2180: fa fb fc fc fa fb fc fc fa fb fc fc 00 00 fc fc
>ffff88801cbe2200: 00 00 fc fc 00 00 fc fc fa fb fc fc fb fb fc fc
                         ^
 ffff88801cbe2280: fb fb fc fc 00 00 fc fc 00 00 fc fc fa fb fc fc
 ffff88801cbe2300: 00 00 fc fc fa fb fc fc fa fb fc fc fa fb fc fc
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