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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff88802a50202a by task syz.2.8970/26587

CPU: 0 UID: 0 PID: 26587 Comm: syz.2.8970 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:packet_release+0x2d8/0xce0
Code: f8 48 c1 e8 03 42 80 3c 20 00 74 08 4c 89 ff e8 8e 09 d8 f7 4d 8b 3f 49 81 c6 d8 00 00 00 4c 89 f0 48 c1 e8 03 42 0f b6 04 20 <84> c0 0f 85 8b 09 00 00 41 8b 1e bf 41 00 00 00 89 de e8 01 a3 74
RSP: 0018:ffffc90006467c20 EFLAGS: 00000a06
RAX: 0000000000000000 RBX: ffff88811ed94028 RCX: 1ffff92000c8cf68
RDX: 0000000000000001 RSI: 0000000000000008 RDI: ffffc90006467ba0
RBP: ffffc90006467d18 R08: ffffc90006467ba7 R09: 1ffff92000c8cf74
R10: dffffc0000000000 R11: fffff52000c8cf75 R12: dffffc0000000000
R13: ffff88811ed94000 R14: ffffffff8f660078 R15: 0000607e5c003458
 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
RIP: 0033:0x7fa95798ebe9
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 a8 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007ffedb0a1748 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 00007fa957bb7da0 RCX: 00007fa95798ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007fa957bb7da0 R08: 0000000000000040 R09: 00000004db0a1a3f
R10: 00000000003ffd9c R11: 0000000000000246 R12: 0000000000062d3f
R13: 00007ffedb0a1840 R14: ffffffffffffffff R15: 00007ffedb0a1860
 </TASK>

Allocated by task 26303:
 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 26303:
 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 ffff88802a502000
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff88802a502000, ffff88802a502200)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88802a500400 pfn:0x2a500
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 ffffea000086f710 ffffea00009ed310
raw: ffff88802a500400 000000000010000b 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a441c80 ffffea000086f710 ffffea00009ed310
head: ffff88802a500400 000000000010000b 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000a94001 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 5853, tgid 5853 (syz-executor), ts 58521486233, free_ts 58513195194
 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
 shmem_fill_super+0xc8/0x1190
 get_tree_nodev+0xbb/0x150
 vfs_get_tree+0x92/0x2b0
 do_new_mount+0x2a2/0x9e0
 __se_sys_mount+0x317/0x410
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
page last free pid 5853 tgid 5853 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_ack+0x146/0xa50
 netlink_rcv_skb+0x28c/0x470
 genl_rcv+0x28/0x40
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
 __sys_sendto+0x3bd/0x520
 __x64_sys_sendto+0xde/0x100
 do_syscall_64+0xfa/0x3b0

Memory state around the buggy address:
 ffff88802a501f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88802a501f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88802a502000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88802a502080: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88802a502100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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