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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff88803a92382a by task syz.2.8106/24085

CPU: 0 UID: 0 PID: 24085 Comm: syz.2.8106 Not tainted 6.16.0-syzkaller-12063-g37816488247d-dirty #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:
 <IRQ>
 dump_stack_lvl+0x189/0x250
 print_report+0xca/0x240
 kasan_report+0x118/0x150
 rose_timer_expiry+0x471/0x4b0
 call_timer_fn+0x17e/0x5f0
 __run_timer_base+0x61a/0x860
 run_timer_softirq+0xb7/0x180
 handle_softirqs+0x286/0x870
 __irq_exit_rcu+0xca/0x1f0
 irq_exit_rcu+0x9/0x30
 sysvec_apic_timer_interrupt+0xa6/0xc0
 </IRQ>
 <TASK>
 asm_sysvec_apic_timer_interrupt+0x1a/0x20
RIP: 0010:_raw_write_unlock_irq+0x29/0x50
Code: 90 f3 0f 1e fa 53 48 89 fb 48 83 c7 18 48 8b 74 24 08 e8 3a 11 22 f6 48 89 df e8 72 b1 22 f6 e8 7d fa 4b f6 fb bf 01 00 00 00 <e8> e2 a1 14 f6 65 8b 05 5b 95 24 07 85 c0 74 07 5b e9 01 41 00 00
RSP: 0018:ffffc90007007910 EFLAGS: 00000282
RAX: 99db2d42f75d6300 RBX: ffffffff8de0c040 RCX: 99db2d42f75d6300
RDX: 0000000000000000 RSI: ffffffff8d9b494b RDI: 0000000000000001
RBP: ffffc90007007ad0 R08: ffffffff8fa34737 R09: 1ffffffff1f468e6
R10: dffffc0000000000 R11: fffffbfff1f468e7 R12: 0000000000000000
R13: ffffc90007007a40 R14: 1ffff110211807df R15: ffff8881088e5640
 release_task+0x12f9/0x17f0
 do_exit+0x15f2/0x2300
 do_group_exit+0x21c/0x2d0
 get_signal+0x1286/0x1340
 arch_do_signal_or_restart+0x9a/0x750
 exit_to_user_mode_loop+0x75/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fc18b98ebe9
Code: Unable to access opcode bytes at 0x7fc18b98ebbf.
RSP: 002b:00007fc18c8980e8 EFLAGS: 00000246 ORIG_RAX: 00000000000000ca
RAX: fffffffffffffe00 RBX: 00007fc18bbb5fa8 RCX: 00007fc18b98ebe9
RDX: 0000000000000000 RSI: 0000000000000080 RDI: 00007fc18bbb5fa8
RBP: 00007fc18bbb5fa0 R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 00007fc18bbb6038 R14: 00007ffdfea4fc80 R15: 00007ffdfea4fd68
 </TASK>

Allocated by task 23729:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 __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_sendmsg+0x52d/0x830
 ___sys_sendmsg+0x21f/0x2a0
 __sys_sendmmsg+0x227/0x430
 __x64_sys_sendmmsg+0xa0/0xc0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 23728:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 genradix_free_recurse+0x5d/0xa0
 genradix_free_recurse+0x5d/0xa0
 sctp_stream_free+0xd5/0x110
 sctp_association_free+0x26d/0x7f0
 sctp_do_sm+0x3eba/0x5a20
 sctp_primitive_SHUTDOWN+0x98/0xc0
 sctp_close+0x409/0x900
 inet_release+0x144/0x190
 sock_close+0xc3/0x240
 __fput+0x44c/0xa70
 task_work_run+0x1d4/0x260
 exit_to_user_mode_loop+0xec/0x110
 do_syscall_64+0x2bd/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88803a923800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff88803a923800, ffff88803a923a00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88803a921400 pfn:0x3a920
head: order:2 mapcount:0 entire_mapcount:0 nr_pages_mapped:0 pincount:0
flags: 0xfff00000000240(workingset|head|node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000240 ffff88801a441c80 ffffea00008cf610 ffffea00009df110
raw: ffff88803a921400 000000000010000a 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a441c80 ffffea00008cf610 ffffea00009df110
head: ffff88803a921400 000000000010000a 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000ea4801 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 5846, tgid 5846 (syz-executor), ts 56054491780, free_ts 0
 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
 __ipv6_dev_mc_inc+0x44f/0xa50
 ipv6_add_dev+0xe54/0x1370
 addrconf_notify+0x794/0x1010
 notifier_call_chain+0x1b6/0x3e0
 register_netdevice+0x1608/0x1ae0
 cfg80211_register_netdevice+0x150/0x2f0
 ieee80211_if_add+0xe60/0x1390
 ieee80211_register_hw+0x3551/0x4080
 mac80211_hwsim_new_radio+0x2f0e/0x5340
page_owner free stack trace missing

Memory state around the buggy address:
 ffff88803a923700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88803a923780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88803a923800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88803a923880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88803a923900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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