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BUG: KASAN: slab-use-after-free in rose_timer_expiry+0x471/0x4b0
Read of size 2 at addr ffff888021dde42a by task modprobe/19743

CPU: 1 UID: 0 PID: 19743 Comm: modprobe 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:__sanitizer_cov_trace_const_cmp8+0x0/0x90
Code: 7c 11 10 48 89 74 11 18 48 89 44 11 20 c3 cc cc cc cc cc 0f 1f 80 00 00 00 00 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 <f3> 0f 1e fa 48 8b 04 24 65 48 8b 0c 25 08 f0 9f 92 65 8b 15 88 3f
RSP: 0000:ffffc9000a9879b0 EFLAGS: 00000246
RAX: ffffea0004d9de40 RBX: 00000000000000e8 RCX: ffff888105ac9cc0
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000000000000
RBP: 1ffffd40009b3bc9 R08: ffffea0004d9de47 R09: 1ffffd40009b3bc8
R10: dffffc0000000000 R11: fffff940009b3bc9 R12: ffffea0004d9de40
R13: ffffea0004d9de08 R14: ffffea0004d9de48 R15: ffffc9000a987b40
 next_uptodate_folio+0x193/0x5d0
 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: 0033:0x7f75658f4fe4
Code: 13 80 e6 02 48 8d 05 5b 37 fa ff 48 8d 15 94 36 fa ff eb a8 80 e1 02 48 8d 05 88 86 04 00 48 8d 15 71 b0 04 00 48 0f 45 c2 c3 <48> 8b 35 d5 3e 0c 00 48 8d 05 ce 36 fa ff 8b 8e a4 01 00 00 f6 c5
RSP: 002b:00007ffc4fbac048 EFLAGS: 00010202
RAX: 0000000000000015 RBX: 00007f756578ce58 RCX: 0000000000000000
RDX: 000000000000000d RSI: 00007f756578c8ad RDI: 00007f7565835400
RBP: 00007ffc4fbac150 R08: 00007ffc4fbabfc8 R09: 00007f7565a8b500
R10: 00007f756578b850 R11: 0000000000000007 R12: 00007f7565a8c4b0
R13: 00007f75658f4fe4 R14: 00007f75657def38 R15: 00007f7565789710
 </TASK>

Allocated by task 19140:
 kasan_save_track+0x3e/0x80
 __kasan_kmalloc+0x93/0xb0
 __kmalloc_cache_noprof+0x230/0x3d0
 __genradix_ptr_alloc+0x199/0x4a0
 __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 19140:
 kasan_save_track+0x3e/0x80
 kasan_save_free_info+0x46/0x50
 __kasan_slab_free+0x5b/0x80
 kfree+0x18e/0x440
 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 ffff888021dde400
 which belongs to the cache kmalloc-512 of size 512
The buggy address is located 42 bytes inside of
 freed 512-byte region [ffff888021dde400, ffff888021dde600)

The buggy address belongs to the physical page:
page: refcount:0 mapcount:0 mapping:0000000000000000 index:0xffff888021ddc400 pfn:0x21ddc
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 ffffea0000e4c010 ffffea0000ea7810
raw: ffff888021ddc400 0000000000100004 00000000f5000000 0000000000000000
head: 00fff00000000240 ffff88801a441c80 ffffea0000e4c010 ffffea0000ea7810
head: ffff888021ddc400 0000000000100004 00000000f5000000 0000000000000000
head: 00fff00000000002 ffffea0000877701 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 7096, tgid 7095 (syz.0.324), ts 78205207609, free_ts 76352331169
 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
 __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
page last free pid 6955 tgid 6955 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
 getname_flags+0xb8/0x540
 vfs_fstatat+0x43/0x170
 __x64_sys_newfstatat+0x116/0x190
 do_syscall_64+0xfa/0x3b0
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Memory state around the buggy address:
 ffff888021dde300: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888021dde380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888021dde400: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                                  ^
 ffff888021dde480: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888021dde500: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
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