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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff88802110602a by task syz.0.6444/20317

CPU: 0 UID: 0 PID: 20317 Comm: syz.0.6444 Not tainted 6.16.0-syzkaller-06600-g1dbf1d590d10 #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:__rmqueue_pcplist+0x198d/0x1df0
Code: 0f 8c a5 eb ff ff 48 8b bc 24 90 00 00 00 45 89 c6 e8 d7 1d 0d 00 45 89 f0 e9 8d eb ff ff 41 88 df 48 8b 44 24 10 48 8b 40 f8 <48> b9 ff ff ff 00 80 0f 00 00 48 21 c8 49 09 c5 4d 09 fd 0f 85 d5
RSP: 0018:ffffc900084d6f00 EFLAGS: 00000246
RAX: 00fff00000000000 RBX: 1ffffd40001a6700 RCX: dffffc0000000000
RDX: 0000000000000000 RSI: 0000000000000004 RDI: ffffea0000d33a80
RBP: ffffc900084d70f0 R08: ffffea0000d33ab7 R09: 1ffffd40001a6756
R10: dffffc0000000000 R11: fffff940001a6757 R12: 0000000000000000
R13: 0000000000000000 R14: ffffea0000d33a88 R15: 0000000000000000
 get_page_from_freelist+0x86a/0x22c0
 __alloc_frozen_pages_noprof+0x181/0x370
 alloc_pages_bulk_noprof+0x560/0x710
 kasan_populate_vmalloc+0xba/0x1a0
 alloc_vmap_area+0xd51/0x1490
 __get_vm_area_node+0x1f8/0x300
 __vmalloc_node_range_noprof+0x301/0x12f0
 __vmalloc_node_noprof+0xc2/0x110
 dup_task_struct+0x3e7/0x860
 copy_process+0x54b/0x3c00
 kernel_clone+0x21e/0x840
 __se_sys_clone3+0x256/0x2d0
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x7fbe847c3449
Code: d7 08 00 48 8d 3d 5c d7 08 00 e8 02 29 f6 ff 66 90 b8 ea ff ff ff 48 85 ff 74 2c 48 85 d2 74 27 49 89 c8 b8 b3 01 00 00 0f 05 <48> 85 c0 7c 18 74 01 c3 31 ed 48 83 e4 f0 4c 89 c7 ff d2 48 89 c7
RSP: 002b:00007ffc541e62f8 EFLAGS: 00000206 ORIG_RAX: 00000000000001b3
RAX: ffffffffffffffda RBX: 00007fbe84745850 RCX: 00007fbe847c3449
RDX: 00007fbe84745850 RSI: 0000000000000058 RDI: 00007ffc541e6340
RBP: 00007fbe829f66c0 R08: 00007fbe829f66c0 R09: 00007ffc541e6427
R10: 0000000000000008 R11: 0000000000000206 R12: ffffffffffffffa8
R13: 000000000000000b R14: 00007ffc541e6340 R15: 00007ffc541e6428
 </TASK>

Allocated by task 19646:
 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 19646:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x62/0x70
 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 ffff888021106000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff888021106000, ffff888021106200)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888021106000 pfn:0x21104
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 ffffea0000ba0010 ffffea0000fe1f10
raw: ffff888021106000 000000000010000e 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a441c80 ffffea0000ba0010 ffffea0000fe1f10
head: ffff888021106000 000000000010000e 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000844101 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 5669, tgid 5669 (kworker/u8:2), ts 90401682821, free_ts 73468858807
 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/0x3b0
 ___slab_alloc+0xbfc/0x1480
 __kmalloc_cache_noprof+0x296/0x3d0
 batadv_forw_packet_alloc+0x1e9/0x390
 batadv_iv_ogm_queue_add+0x85f/0xd30
 batadv_iv_ogm_schedule+0xb48/0xf00
 batadv_iv_send_outstanding_bat_ogm_packet+0x6c6/0x7e0
 process_scheduled_works+0xae1/0x17b0
 worker_thread+0x8a0/0xda0
 kthread+0x711/0x8a0
 ret_from_fork+0x3fc/0x770
 ret_from_fork_asm+0x1a/0x30
page last free pid 6339 tgid 6337 stack trace:
 __free_frozen_pages+0xc71/0xe70
 pagetable_dtor_free+0x2d2/0x3b0
 __mmdrop+0xb5/0x460
 exit_mm+0x1da/0x2c0
 do_exit+0x648/0x22e0
 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

Memory state around the buggy address:
 ffff888021105f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888021105f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888021106000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888021106080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888021106100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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