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BUG: KASAN: slab-use-after-free in ptep_get include/linux/pgtable.h:317 [inline]
BUG: KASAN: slab-use-after-free in ptep_get_lockless include/linux/pgtable.h:581 [inline]
BUG: KASAN: slab-use-after-free in pte_range_none mm/memory.c:4409 [inline]
BUG: KASAN: slab-use-after-free in finish_fault+0xf87/0x1460 mm/memory.c:4905
Read of size 8 at addr ffff88802c50d000 by task syz-executor.4/13848

CPU: 0 PID: 13848 Comm: syz-executor.4 Not tainted 6.10.0-rc2-next-20240607-syzkaller #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/02/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:91 [inline]
 dump_stack_lvl+0x241/0x360 lib/dump_stack.c:117
 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
 ptep_get include/linux/pgtable.h:317 [inline]
 ptep_get_lockless include/linux/pgtable.h:581 [inline]
 pte_range_none mm/memory.c:4409 [inline]
 finish_fault+0xf87/0x1460 mm/memory.c:4905
 do_read_fault mm/memory.c:5052 [inline]
 do_fault mm/memory.c:5178 [inline]
 do_pte_missing mm/memory.c:3948 [inline]
 handle_pte_fault+0x3db5/0x7130 mm/memory.c:5502
 __handle_mm_fault mm/memory.c:5645 [inline]
 handle_mm_fault+0x10df/0x1ba0 mm/memory.c:5810
 faultin_page mm/gup.c:1339 [inline]
 __get_user_pages+0x6ef/0x1590 mm/gup.c:1638
 populate_vma_page_range+0x264/0x330 mm/gup.c:2078
 __mm_populate+0x27a/0x460 mm/gup.c:2181
 mm_populate include/linux/mm.h:3442 [inline]
 __do_sys_remap_file_pages mm/mmap.c:3177 [inline]
 __se_sys_remap_file_pages+0x7a1/0x9a0 mm/mmap.c:3103
 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
RIP: 0033:0x7f3ddf27cf69
Code: 28 00 00 00 75 05 48 83 c4 28 c3 e8 e1 20 00 00 90 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 b0 ff ff ff f7 d8 64 89 01 48
RSP: 002b:00007f3de00090c8 EFLAGS: 00000246 ORIG_RAX: 00000000000000d8
RAX: ffffffffffffffda RBX: 00007f3ddf3b4120 RCX: 00007f3ddf27cf69
RDX: 0000000000000000 RSI: 0000000000200000 RDI: 00000000202ec000
RBP: 00007f3ddf2da6fe R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000006e R14: 00007f3ddf3b4120 R15: 00007ffc2110ea38
 </TASK>

Allocated by task 13632:
 kasan_save_stack mm/kasan/common.c:47 [inline]
 kasan_save_track+0x3f/0x80 mm/kasan/common.c:68
 unpoison_slab_object mm/kasan/common.c:312 [inline]
 __kasan_slab_alloc+0x66/0x80 mm/kasan/common.c:338
 kasan_slab_alloc include/linux/kasan.h:201 [inline]
 slab_post_alloc_hook mm/slub.c:3941 [inline]
 slab_alloc_node mm/slub.c:4001 [inline]
 kmem_cache_alloc_noprof+0x135/0x2a0 mm/slub.c:4008
 __sigqueue_alloc+0x42e/0x540 kernel/signal.c:428
 __send_signal_locked+0x22f/0xdc0 kernel/signal.c:1119
 do_send_sig_info kernel/signal.c:1301 [inline]
 group_send_sig_info+0x292/0x310 kernel/signal.c:1451
 bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881
 ____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
 bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884
 0xffffffffa0001fb2
 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
 __bpf_prog_run include/linux/filter.h:691 [inline]
 bpf_prog_run include/linux/filter.h:698 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline]
 bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2444
 trace_kfree include/trace/events/kmem.h:94 [inline]
 kfree+0x2bb/0x360 mm/slub.c:4545
 ___sys_recvmsg net/socket.c:2847 [inline]
 do_recvmmsg+0x498/0xae0 net/socket.c:2940
 __sys_recvmmsg net/socket.c:3019 [inline]
 __do_sys_recvmmsg net/socket.c:3042 [inline]
 __se_sys_recvmmsg net/socket.c:3035 [inline]
 __x64_sys_recvmmsg+0x199/0x250 net/socket.c:3035
 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 13631:
 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:579
 poison_slab_object+0xe0/0x150 mm/kasan/common.c:240
 __kasan_slab_free+0x37/0x60 mm/kasan/common.c:256
 kasan_slab_free include/linux/kasan.h:184 [inline]
 slab_free_hook mm/slub.c:2196 [inline]
 slab_free mm/slub.c:4437 [inline]
 kmem_cache_free+0x145/0x350 mm/slub.c:4512
 __sigqueue_free kernel/signal.c:451 [inline]
 collect_signal kernel/signal.c:594 [inline]
 __dequeue_signal+0x4ac/0x5c0 kernel/signal.c:616
 dequeue_signal+0x169/0x5a0 kernel/signal.c:639
 get_signal+0x602/0x1740 kernel/signal.c:2788
 arch_do_signal_or_restart+0x96/0x830 arch/x86/kernel/signal.c:310
 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 ffff88802c50d000
 which belongs to the cache sigqueue of size 80
The buggy address is located 0 bytes inside of
 freed 80-byte region [ffff88802c50d000, ffff88802c50d050)

The buggy address belongs to the physical page:
page: refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88802c50df50 pfn:0x2c50d
memcg:ffff888064413001
flags: 0xfff00000000200(workingset|node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xfdffffff(slab)
raw: 00fff00000000200 ffff888016ad73c0 ffff888015eefb88 ffffea0000b14390
raw: ffff88802c50df50 000000000024000c 00000001fdffffff ffff888064413001
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x152820(GFP_ATOMIC|__GFP_NOWARN|__GFP_NORETRY|__GFP_COMP|__GFP_HARDWALL), pid 13632, tgid 13631 (syz-executor.1), ts 699248633687, free_ts 681838118961
 set_page_owner include/linux/page_owner.h:32 [inline]
 post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1470
 prep_new_page mm/page_alloc.c:1478 [inline]
 get_page_from_freelist+0x2cbd/0x2d70 mm/page_alloc.c:3457
 __alloc_pages_noprof+0x256/0x6c0 mm/page_alloc.c:4715
 __alloc_pages_node_noprof include/linux/gfp.h:269 [inline]
 alloc_pages_node_noprof include/linux/gfp.h:296 [inline]
 alloc_slab_page+0x5f/0x120 mm/slub.c:2265
 allocate_slab+0x5a/0x2f0 mm/slub.c:2428
 new_slab mm/slub.c:2481 [inline]
 ___slab_alloc+0xcd1/0x14b0 mm/slub.c:3667
 __slab_alloc+0x58/0xa0 mm/slub.c:3757
 __slab_alloc_node mm/slub.c:3810 [inline]
 slab_alloc_node mm/slub.c:3989 [inline]
 kmem_cache_alloc_noprof+0x1c1/0x2a0 mm/slub.c:4008
 __sigqueue_alloc+0x42e/0x540 kernel/signal.c:428
 __send_signal_locked+0x22f/0xdc0 kernel/signal.c:1119
 do_send_sig_info kernel/signal.c:1301 [inline]
 group_send_sig_info+0x292/0x310 kernel/signal.c:1451
 bpf_send_signal_common+0x2dd/0x430 kernel/trace/bpf_trace.c:881
 ____bpf_send_signal kernel/trace/bpf_trace.c:886 [inline]
 bpf_send_signal+0x19/0x30 kernel/trace/bpf_trace.c:884
 0xffffffffa0001fb2
 bpf_dispatcher_nop_func include/linux/bpf.h:1243 [inline]
 __bpf_prog_run include/linux/filter.h:691 [inline]
 bpf_prog_run include/linux/filter.h:698 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2403 [inline]
 bpf_trace_run2+0x2ec/0x540 kernel/trace/bpf_trace.c:2444
 trace_kfree include/trace/events/kmem.h:94 [inline]
 kfree+0x2bb/0x360 mm/slub.c:4545
page last free pid 10783 tgid 10783 stack trace:
 reset_page_owner include/linux/page_owner.h:25 [inline]
 free_pages_prepare mm/page_alloc.c:1089 [inline]
 free_unref_page+0xd22/0xea0 mm/page_alloc.c:2621
 kasan_depopulate_vmalloc_pte+0x74/0x90 mm/kasan/shadow.c:408
 apply_to_pte_range mm/memory.c:2798 [inline]
 apply_to_pmd_range mm/memory.c:2842 [inline]
 apply_to_pud_range mm/memory.c:2878 [inline]
 apply_to_p4d_range mm/memory.c:2914 [inline]
 __apply_to_page_range+0x8a8/0xe50 mm/memory.c:2948
 kasan_release_vmalloc+0x9a/0xb0 mm/kasan/shadow.c:525
 purge_vmap_node+0x3e3/0x770 mm/vmalloc.c:2208
 __purge_vmap_area_lazy+0x708/0xae0 mm/vmalloc.c:2290
 drain_vmap_area_work+0x27/0x40 mm/vmalloc.c:2324
 process_one_work kernel/workqueue.c:3248 [inline]
 process_scheduled_works+0xa2c/0x1830 kernel/workqueue.c:3329
 worker_thread+0x86d/0xd50 kernel/workqueue.c:3409
 kthread+0x2f0/0x390 kernel/kthread.c:389
 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:144
 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244

Memory state around the buggy address:
 ffff88802c50cf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffff88802c50cf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffff88802c50d000: fa fb fb fb fb fb fb fb fb fb fc fc fc fc fa fb
                   ^
 ffff88802c50d080: fb fb fb fb fb fb fb fb fc fc fc fc fa fb fb fb
 ffff88802c50d100: fb fb fb fb fb fb fc fc fc fc fa fb fb fb fb fb
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