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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff88811b5fac2a by task syz.2.5216/25183

CPU: 0 UID: 0 PID: 25183 Comm: syz.2.5216 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:
 <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:__text_poke+0x7ac/0xa10
Code: 00 4d 85 f6 75 16 e8 23 56 58 00 eb 15 e8 1c 56 58 00 e8 07 02 12 0a 4d 85 f6 74 ea e8 0d 56 58 00 fb 48 8b bc 24 e0 00 00 00 <e8> 7f 97 14 0a e8 aa 08 12 0a 89 c3 31 ff 89 c6 e8 2f 5a 58 00 85
RSP: 0018:ffffc90007ee7a80 EFLAGS: 00000293
RAX: ffffffff81675623 RBX: 0000000000000000 RCX: ffff888022ae1cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: ffff88801a475060
RBP: ffffc90007ee7bd0 R08: ffffffff8fa37e37 R09: 1ffffffff1f46fc6
R10: dffffc0000000000 R11: fffffbfff1f46fc7 R12: dffffc0000000000
R13: ffff88801a476558 R14: 0000000000000200 R15: ffffffff898a5989
 smp_text_poke_batch_finish+0x394/0x1130
 arch_jump_label_transform_apply+0x1c/0x30
 __static_key_slow_dec_cpuslocked+0xbe/0x140
 static_key_slow_dec+0x45/0x90
 bpf_stats_release+0x23/0x40
 __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: 0033:0x7f75fc98ebe9
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:00007ffc1e38fb78 EFLAGS: 00000246 ORIG_RAX: 00000000000001b4
RAX: 0000000000000000 RBX: 0000000000072dc0 RCX: 00007f75fc98ebe9
RDX: 0000000000000000 RSI: 000000000000001e RDI: 0000000000000003
RBP: 00007f75fcbb7da0 R08: 0000000000000001 R09: 0000001b1e38fe6f
R10: 0000001b31420000 R11: 0000000000000246 R12: 00007f75fcbb5fac
R13: 00007f75fcbb5fa0 R14: ffffffffffffffff R15: 00007ffc1e38fc90
 </TASK>

Allocated by task 24364:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 kernfs_fop_open+0x397/0xca0
 do_dentry_open+0x953/0x13f0
 vfs_open+0x3b/0x340
 path_openat+0x2ee5/0x3830
 do_filp_open+0x1fa/0x410
 do_sys_openat2+0x121/0x1c0
 __x64_sys_openat+0x138/0x170
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 24364:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 kernfs_fop_release+0x160/0x190
 __fput+0x44c/0xa70
 fput_close_sync+0x119/0x200
 __x64_sys_close+0x7f/0x110
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff88811b5fac00
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff88811b5fac00, ffff88811b5fae00)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff88811b5f8000 pfn:0x11b5f8
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 ffffea0004474910 ffffea0004437f10
raw: ffff88811b5f8000 000000000010000a 00000000f5000000 0000000000000000
head: 057ff00000000240 ffff88801a441c80 ffffea0004474910 ffffea0004437f10
head: ffff88811b5f8000 000000000010000a 00000000f5000000 0000000000000000
head: 057ff00000000002 ffffea00046d7e01 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 8383, tgid 8382 (syz.2.675), ts 128612352920, free_ts 93385944977
 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
 hash_ip4_resize+0xa88/0x1990
 call_ad+0x44e/0xb00
 ip_set_ad+0x791/0x930
 nfnetlink_rcv_msg+0xb4d/0x1130
 netlink_rcv_skb+0x208/0x470
 nfnetlink_rcv+0x26a/0x2520
 netlink_unicast+0x82f/0x9e0
 netlink_sendmsg+0x805/0xb30
 __sock_sendmsg+0x21c/0x270
page last free pid 7672 tgid 7672 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+0x13b3/0x1970
 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:
 ffff88811b5fab00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff88811b5fab80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff88811b5fac00: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff88811b5fac80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff88811b5fad00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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