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BUG: KASAN: slab-use-after-free in rose_transmit_link+0x5c3/0x740
Read of size 1 at addr ffff88811050e432 by task syz.2.508/7870

CPU: 1 UID: 0 PID: 7870 Comm: syz.2.508 Not tainted syzkaller #0 PREEMPT(full) 
Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.2-debian-1.16.2-1 04/01/2014
Call Trace:
 <TASK>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 rose_transmit_link+0x5c3/0x740
 rose_write_internal+0x11dc/0x1ac0
 rose_release+0x24e/0x520
 sock_close+0xc3/0x240
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 do_exit+0x6b5/0x2300
 do_group_exit+0x21c/0x2d0
 __x64_sys_exit_group+0x3f/0x40
 x64_sys_call+0x21f7/0x2200
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7f2000b8ebe9
Code: Unable to access opcode bytes at 0x7f2000b8ebbf.
RSP: 002b:00007ffd2ebd9578 EFLAGS: 00000246 ORIG_RAX: 00000000000000e7
RAX: ffffffffffffffda RBX: 000000000000000b RCX: 00007f2000b8ebe9
RDX: 00007f2000b461f7 RSI: 0000000000000000 RDI: 000000000000000b
RBP: 0000000000000003 R08: 00007ffd2ebd98a7 R09: 000000000000000b
R10: 00007f2000db5fa0 R11: 0000000000000246 R12: 00007f2000db627c
R13: 00007f2000db6270 R14: 00000000000015bf R15: 0000000000000003
 </TASK>

Allocated by task 7819:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 rose_add_node+0x23a/0xde0
 rose_rt_ioctl+0xa48/0xfb0
 rose_ioctl+0x3ce/0x8b0
 sock_do_ioctl+0xdc/0x300
 sock_ioctl+0x576/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 7868:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 rose_rt_device_down+0x473/0x4c0
 rose_device_event+0x603/0x6a0
 notifier_call_chain+0x1b6/0x3e0
 netif_close_many+0x29c/0x410
 netif_close+0x158/0x210
 dev_close+0x10a/0x220
 bpq_device_event+0x377/0x6a0
 notifier_call_chain+0x1b6/0x3e0
 netif_close_many+0x29c/0x410
 netif_close+0x158/0x210
 dev_close+0x10a/0x220
 bond_setup_by_slave+0x5f/0x3f0
 bond_enslave+0x7a0/0x3a20
 bond_do_ioctl+0x635/0x9b0
 bond_siocdevprivate+0x17e/0x350
 dev_ifsioc+0xb57/0xf00
 dev_ioctl+0x84c/0x1150
 sock_ioctl+0x719/0x790
 __se_sys_ioctl+0xfc/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88811050e400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 50 bytes inside of
 freed 512-byte region [ffff88811050e400, ffff88811050e600)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88811050d400 pfn:0x11050c
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0x57ff00000000240(workingset|head|node=1|zone=2|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 057ff00000000240 ffff88801a441c80 ffffea00043a5b10 ffffea000449a110
raw: ffff88811050d400 000000000010000a 00000000f5000000 0000000000000000
head: 057ff00000000240 ffff88801a441c80 ffffea00043a5b10 ffffea000449a110
head: ffff88811050d400 000000000010000a 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea0004414301 00000000ffffffff 00000000ffffffff
head: ffffffffffffffff 0000000000000000 00000000ffffffff 0000000000000004
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 2, migratetype Unmovable, gfp_mask 0xd20c0(__GFP_IO|__GFP_FS|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_NOMEMALLOC), pid 7190, tgid 7189 (syz.0.327), ts 78692007187, free_ts 57302544198
 post_alloc_hook+0x240/0x2a0
 get_page_from_freelist+0x21e4/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_mpol+0x232/0x4a0
 allocate_slab+0x8a/0x370
 ___slab_alloc+0xbeb/0x1410
 __kmalloc_cache_noprof+0x296/0x3d0
 __genradix_ptr_alloc+0x352/0x4a0
 __genradix_prealloc+0x44/0x90
 sctp_stream_init+0x14b/0x440
 sctp_association_new+0x10dd/0x25f0
 sctp_connect_new_asoc+0x2c5/0x690
 sctp_sendmsg+0x155c/0x2810
 __sock_sendmsg+0x19c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
page last free pid 5892 tgid 5892 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __put_partials+0x156/0x1a0
 put_cpu_partial+0x17c/0x250
 __slab_free+0x2d5/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_noprof+0x1c1/0x3c0
 vm_area_dup+0x2b/0x680
 __split_vma+0x1a9/0xa00
 vma_modify+0x12c3/0x1970
 vma_modify_flags+0x1e8/0x230
 mprotect_fixup+0x407/0x9c0
 do_mprotect_pkey+0x8cd/0xce0
 __x64_sys_mprotect+0x80/0x90
 do_syscall_64+0xfa/0x3b0

Memory state around the buggy address:
 ffff88811050e300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811050e380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811050e400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                     ^
 ffff88811050e480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811050e500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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