syzbot

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BUG: KASAN: slab-use-after-free in __bpf_trace_run kernel/trace/bpf_trace.c:2304 [inline]
BUG: KASAN: slab-use-after-free in bpf_trace_run2+0xfa/0x540 kernel/trace/bpf_trace.c:2359
Read of size 8 at addr ffff888012711318 by task syz-execprog/5239

CPU: 1 UID: 0 PID: 5239 Comm: syz-execprog Not tainted 6.12.0-rc3-next-20241016-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 09/13/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:94 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:120
 print_address_description mm/kasan/report.c:377 [inline]
 print_report+0x169/0x550 mm/kasan/report.c:488
 kasan_report+0x143/0x180 mm/kasan/report.c:601
 __bpf_trace_run kernel/trace/bpf_trace.c:2304 [inline]
 bpf_trace_run2+0xfa/0x540 kernel/trace/bpf_trace.c:2359
 __bpf_trace_sys_enter+0x38/0x60 include/trace/events/syscalls.h:18
 trace_sys_enter+0xd9/0x150 include/trace/events/syscalls.h:18
 syscall_trace_enter+0xf8/0x150 kernel/entry/common.c:61
 syscall_enter_from_user_mode_work include/linux/entry-common.h:168 [inline]
 syscall_enter_from_user_mode include/linux/entry-common.h:198 [inline]
 do_syscall_64+0xcc/0x230 arch/x86/entry/common.c:79
 entry_SYSCALL_64_after_hwframe+0x77/0x7f
RIP: 0033:0x4761a9
Code: 0d 0c b2 ba 03 4c 8d 05 95 63 c3 03 4c 8d 0d 0e fa ff ff 48 8b 05 af d1 ba 03 ff e0 cc cc cc cc cc 48 c7 c0 0f 00 00 00 0f 05 <cd> 03 cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc cc
RSP: 002b:000000c001e4fac0 EFLAGS: 00000206 ORIG_RAX: 000000000000000f
RAX: ffffffffffffffda RBX: 0000000000000000 RCX: 00000000004761a9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 00000000040abfdc
RBP: 000000c001e43d40 R08: 000000000213b6e0 R09: 000000000213eb78
R10: 0000000000000000 R11: 0000000000000206 R12: 000000c001e43d98
R13: 0000000000000001 R14: 000000c001c95c00 R15: 0000000000000001
 </TASK>

Allocated by task 5444:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 poison_kmalloc_redzone mm/kasan/common.c:377 [inline]
 __kasan_kmalloc+0x98/0xb0 mm/kasan/common.c:394
 kasan_kmalloc include/linux/kasan.h:260 [inline]
 __kmalloc_cache_noprof+0x243/0x390 mm/slub.c:4304
 kmalloc_noprof include/linux/slab.h:901 [inline]
 kzalloc_noprof include/linux/slab.h:1037 [inline]
 bpf_raw_tp_link_attach+0x2a0/0x6e0 kernel/bpf/syscall.c:3829
 bpf_raw_tracepoint_open+0x177/0x1f0 kernel/bpf/syscall.c:3876
 __sys_bpf+0x3c0/0x810 kernel/bpf/syscall.c:5691
 __do_sys_bpf kernel/bpf/syscall.c:5756 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5754 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5754
 do_syscall_x64 arch/x86/entry/common.c:52 [inline]
 do_syscall_64+0xf3/0x230 arch/x86/entry/common.c:83
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

Freed by task 24:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 kasan_save_free_info+0x40/0x50 mm/kasan/generic.c:582
 poison_slab_object mm/kasan/common.c:247 [inline]
 __kasan_slab_free+0x59/0x70 mm/kasan/common.c:264
 kasan_slab_free include/linux/kasan.h:233 [inline]
 slab_free_hook mm/slub.c:2329 [inline]
 slab_free mm/slub.c:4588 [inline]
 kfree+0x1a0/0x460 mm/slub.c:4736
 rcu_do_batch kernel/rcu/tree.c:2567 [inline]
 rcu_core+0xaaa/0x17a0 kernel/rcu/tree.c:2823
 handle_softirqs+0x2c5/0x980 kernel/softirq.c:554
 run_ksoftirqd+0xca/0x130 kernel/softirq.c:921
 smpboot_thread_fn+0x544/0xa30 kernel/smpboot.c:164
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Last potentially related work creation:
 kasan_save_stack+0x3f/0x60 mm/kasan/common.c:47
 __kasan_record_aux_stack+0xac/0xc0 mm/kasan/generic.c:544
 __call_rcu_common kernel/rcu/tree.c:3086 [inline]
 call_rcu+0x167/0xa70 kernel/rcu/tree.c:3190
 bpf_link_put_direct kernel/bpf/syscall.c:3045 [inline]
 bpf_link_release+0x78/0x90 kernel/bpf/syscall.c:3052
 __fput+0x23c/0xa50 fs/file_table.c:434
 task_work_run+0x24f/0x310 kernel/task_work.c:239
 get_signal+0x15e8/0x1740 kernel/signal.c:2690
 arch_do_signal_or_restart+0x96/0x860 arch/x86/kernel/signal.c:337
 exit_to_user_mode_loop kernel/entry/common.c:111 [inline]
 exit_to_user_mode_prepare include/linux/entry-common.h:328 [inline]
 __syscall_exit_to_user_mode_work kernel/entry/common.c:207 [inline]
 syscall_exit_to_user_mode+0xc9/0x370 kernel/entry/common.c:218
 do_syscall_64+0x100/0x230 arch/x86/entry/common.c:89
 entry_SYSCALL_64_after_hwframe+0x77/0x7f

The buggy address belongs to the object at ffff888012711300
 which belongs to the cache kmalloc-128 of size 128
The buggy address is located 24 bytes inside of
 freed 128-byte region [ffff888012711300, ffff888012711380)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x12711
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: f5(slab)
raw: 00fff00000000000 ffff88801ac41a00 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000100010 00000001f5000000 0000000000000000
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x252800(GFP_NOWAIT|__GFP_NORETRY|__GFP_COMP|__GFP_THISNODE), pid 5444, tgid 5442 (syz.3.18), ts 72330766499, free_ts 69203992630
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1537
 prep_new_page mm/page_alloc.c:1545 [inline]
 get_page_from_freelist+0x3123/0x3270 mm/page_alloc.c:3493
 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4769
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_slab_page+0x59/0x120 mm/slub.c:2401
 allocate_slab+0x5a/0x2f0 mm/slub.c:2565
 new_slab mm/slub.c:2618 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3805
 __slab_alloc+0x58/0xa0 mm/slub.c:3895
 __slab_alloc_node mm/slub.c:3970 [inline]
 slab_alloc_node mm/slub.c:4131 [inline]
 __do_kmalloc_node mm/slub.c:4272 [inline]
 __kmalloc_node_noprof+0x2ee/0x4d0 mm/slub.c:4279
 kmalloc_array_node_noprof include/linux/slab.h:1018 [inline]
 alloc_slab_obj_exts+0x3a/0xa0 mm/slub.c:1955
 __memcg_slab_post_alloc_hook+0x319/0x7e0 mm/memcontrol.c:2993
 memcg_slab_post_alloc_hook mm/slub.c:2143 [inline]
 slab_post_alloc_hook mm/slub.c:4104 [inline]
 slab_alloc_node mm/slub.c:4143 [inline]
 __do_kmalloc_node mm/slub.c:4272 [inline]
 __kmalloc_node_noprof+0x30d/0x4d0 mm/slub.c:4279
 kmalloc_node_noprof include/linux/slab.h:928 [inline]
 __bpf_map_area_alloc kernel/bpf/syscall.c:301 [inline]
 bpf_map_area_alloc+0x64/0x120 kernel/bpf/syscall.c:314
 ringbuf_map_alloc+0x188/0x2f0 kernel/bpf/ringbuf.c:201
 map_create+0x946/0x11c0 kernel/bpf/syscall.c:1341
 __sys_bpf+0x6d1/0x810 kernel/bpf/syscall.c:5631
 __do_sys_bpf kernel/bpf/syscall.c:5756 [inline]
 __se_sys_bpf kernel/bpf/syscall.c:5754 [inline]
 __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5754
page last free pid 67 tgid 67 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1108 [inline]
 free_unref_page+0xcfb/0xf20 mm/page_alloc.c:2674
 __slab_free+0x31b/0x3d0 mm/slub.c:4499
 qlink_free mm/kasan/quarantine.c:163 [inline]
 qlist_free_all+0x9a/0x140 mm/kasan/quarantine.c:179
 kasan_quarantine_reduce+0x14f/0x170 mm/kasan/quarantine.c:286
 __kasan_slab_alloc+0x23/0x80 mm/kasan/common.c:329
 kasan_slab_alloc include/linux/kasan.h:250 [inline]
 slab_post_alloc_hook mm/slub.c:4094 [inline]
 slab_alloc_node mm/slub.c:4143 [inline]
 kmem_cache_alloc_node_noprof+0x1d9/0x380 mm/slub.c:4195
 __alloc_skb+0x1c3/0x440 net/core/skbuff.c:668
 alloc_skb include/linux/skbuff.h:1322 [inline]
 nlmsg_new include/net/netlink.h:1015 [inline]
 rtmsg_ifa+0x1f0/0x3b0 net/ipv4/devinet.c:1944
 __inet_del_ifa+0x870/0x1040 net/ipv4/devinet.c:458
 inet_del_ifa net/ipv4/devinet.c:496 [inline]
 inetdev_destroy net/ipv4/devinet.c:336 [inline]
 inetdev_event+0x6a5/0x1550 net/ipv4/devinet.c:1640
 notifier_call_chain+0x19f/0x3e0 kernel/notifier.c:85
 call_netdevice_notifiers_extack net/core/dev.c:2034 [inline]
 call_netdevice_notifiers net/core/dev.c:2048 [inline]
 unregister_netdevice_many_notify+0xedd/0x1da0 net/core/dev.c:11477
 unregister_netdevice_many net/core/dev.c:11541 [inline]
 default_device_exit_batch+0xa1c/0xaa0 net/core/dev.c:12024
 ops_exit_list net/core/net_namespace.c:178 [inline]
 cleanup_net+0x89d/0xcc0 net/core/net_namespace.c:633
 process_one_work kernel/workqueue.c:3229 [inline]
 process_scheduled_works+0xa63/0x1850 kernel/workqueue.c:3310
 worker_thread+0x870/0xd30 kernel/workqueue.c:3391

Memory state around the buggy address:
 ffff888012711200: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
 ffff888012711280: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
>ffff888012711300: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb
                            ^
 ffff888012711380: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc
 ffff888012711400: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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