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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff888028f3182a by task syz-executor/3511

CPU: 0 UID: 0 PID: 3511 Comm: syz-executor Not tainted 6.16.0-syzkaller-12063-g37816488247d #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:debug_lockdep_rcu_enabled+0x2a/0x40
Code: f3 0f 1e fa 31 c0 83 3d 57 89 2a 04 00 74 1e 83 3d 7a b9 2a 04 00 74 15 65 48 8b 0c 25 08 f0 9f 92 31 c0 83 b9 ec 0a 00 00 00 <0f> 94 c0 e9 ce dc 02 00 cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 0000:ffffc90002eef978 EFLAGS: 00000246
RAX: 0000000000000000 RBX: ffffea0000afb0c0 RCX: ffff888021a21cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000040
RBP: dffffc0000000000 R08: ffffea0000afb0c7 R09: 1ffffd400015f618
R10: dffffc0000000000 R11: fffff9400015f619 R12: ffff8881036eedf0
R13: 1ffff920005ddf68 R14: ffffc90002eefb40 R15: ffff888022cf8dc0
 xas_reload+0xd8/0x470
 next_uptodate_folio+0x15f/0x5d0
 filemap_map_pages+0x102b/0x1740
 __handle_mm_fault+0x34ac/0x5440
 handle_mm_fault+0x40a/0x8e0
 do_user_addr_fault+0xa81/0x1390
 exc_page_fault+0x76/0xf0
 asm_exc_page_fault+0x26/0x30
RIP: 0033:0x7ff1387a98f0
Code: Unable to access opcode bytes at 0x7ff1387a98c6.
RSP: 002b:00007ffd189e7028 EFLAGS: 00010216
RAX: 0000000000000020 RBX: 00007ffd189e7590 RCX: 0000000000000000
RDX: 000000000000000a RSI: 00007ffd189e7538 RDI: 0000000000000000
RBP: 0000000000000016 R08: 0000000000000000 R09: 0000000000000000
R10: 00000000ffffffff R11: 0000000000000001 R12: 0000000000000075
R13: 00007ffd189e7710 R14: 00007ffd189e7538 R15: 0000000000000000
 </TASK>

Allocated by task 3034:
 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_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 3034:
 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
 get_signal+0x11ed/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

The buggy address belongs to the object at ffff888028f31800
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff888028f31800, ffff888028f31a00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888028f31400 pfn:0x28f30
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 ffffea0000ebb710 ffffea000084b110
raw: ffff888028f31400 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a441c80 ffffea0000ebb710 ffffea000084b110
head: ffff888028f31400 000000000010000d 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000a3cc01 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 0x52820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP), pid 5848, tgid 5848 (syz-executor), ts 66207915782, free_ts 66205974897
 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_noprof+0x305/0x4f0
 fib6_info_alloc+0x30/0xf0
 ip6_route_info_create+0x142/0x860
 ip6_route_add+0x49/0x1b0
 addrconf_permanent_addr+0x67f/0x9d0
 addrconf_notify+0x887/0x1010
 notifier_call_chain+0x1b6/0x3e0
 __dev_notify_flags+0x18d/0x2e0
 netif_change_flags+0xe8/0x1a0
 do_setlink+0xc55/0x41c0
page last free pid 5848 tgid 5848 stack trace:
 __free_frozen_pages+0xbc4/0xd30
 __slab_free+0x303/0x3c0
 qlist_free_all+0x97/0x140
 kasan_quarantine_reduce+0x148/0x160
 __kasan_slab_alloc+0x22/0x80
 kmem_cache_alloc_node_noprof+0x1bb/0x3c0
 __alloc_skb+0x112/0x2d0
 netlink_sendmsg+0x5c6/0xb30
 __sock_sendmsg+0x21c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888028f31700: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888028f31780: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888028f31800: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888028f31880: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888028f31900: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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