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BUG: KASAN: stack-out-of-bounds in jhash2 include/linux/jhash.h:127 [inline]
BUG: KASAN: stack-out-of-bounds in hash+0x19b/0x410 kernel/bpf/bloom_filter.c:29
Read of size 4 at addr ffffc900046dfc40 by task syz-executor.3/8780

CPU: 1 PID: 8780 Comm: syz-executor.3 Not tainted 6.8.0-syzkaller-05243-g14bb1e8c8d4a #0
Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 03/27/2024
Call Trace:
 <TASK>
 __dump_stack lib/dump_stack.c:88 [inline]
 dump_stack_lvl+0x1e7/0x2e0 lib/dump_stack.c:106
 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
 jhash2 include/linux/jhash.h:127 [inline]
 hash+0x19b/0x410 kernel/bpf/bloom_filter.c:29
 bloom_map_peek_elem+0xb2/0x1b0 kernel/bpf/bloom_filter.c:43
 bpf_prog_00798911c748094f+0x42/0x46
 bpf_dispatcher_nop_func include/linux/bpf.h:1233 [inline]
 __bpf_prog_run include/linux/filter.h:667 [inline]
 bpf_prog_run include/linux/filter.h:674 [inline]
 __bpf_trace_run kernel/trace/bpf_trace.c:2396 [inline]
 bpf_trace_run2+0x2ec/0x530 kernel/trace/bpf_trace.c:2437
 trace_ext4_drop_inode include/trace/events/ext4.h:265 [inline]
 ext4_drop_inode+0x20a/0x270 fs/ext4/super.c:1450
 iput_final fs/inode.c:1711 [inline]
 iput+0x45e/0x900 fs/inode.c:1767
 do_unlinkat+0x512/0x830 fs/namei.c:4407
 __do_sys_unlink fs/namei.c:4448 [inline]
 __se_sys_unlink fs/namei.c:4446 [inline]
 __x64_sys_unlink+0x49/0x60 fs/namei.c:4446
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
RIP: 0033:0x7fb64987dda9
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:00007fb64a6a10c8 EFLAGS: 00000246
 ORIG_RAX: 0000000000000057
RAX: ffffffffffffffda RBX: 00007fb6499abf80 RCX: 00007fb64987dda9
RDX: 0000000000000000 RSI: 0000000000000000 RDI: 0000000020000140
RBP: 00007fb6498ca47a R08: 0000000000000000 R09: 0000000000000000
R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000
R13: 000000000000004d R14: 00007fb6499abf80 R15: 00007ffcd2b9ee78
 </TASK>

The buggy address belongs to stack of task syz-executor.3/8780
 and is located at offset 0 in frame:
 bpf_trace_run2+0x0/0x530

This frame has 2 objects:
 [32, 48) 'run_ctx.i'
 [64, 80) 'args'

The buggy address belongs to the virtual mapping at
 [ffffc900046d8000, ffffc900046e1000) created by:
 copy_process+0x5d1/0x3df0 kernel/fork.c:2219

The buggy address belongs to the physical page:
page:ffffea0001b688c0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x6da23
memcg:ffff888024c2b282
flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff)
page_type: 0xffffffff()
raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000
raw: 0000000000000000 0000000000000000 00000001ffffffff ffff888024c2b282
page dumped because: kasan: bad access detected
page_owner tracks the page as allocated
page last allocated via order 0, migratetype Unmovable, gfp_mask 0x102dc2(GFP_HIGHUSER|__GFP_NOWARN|__GFP_ZERO), pid 8775, tgid 8775 (syz-executor.4), ts 171175374756, free_ts 171035461988
 set_page_owner include/linux/page_owner.h:31 [inline]
 post_alloc_hook+0x1ea/0x210 mm/page_alloc.c:1533
 prep_new_page mm/page_alloc.c:1540 [inline]
 get_page_from_freelist+0x33ea/0x3580 mm/page_alloc.c:3311
 __alloc_pages+0x256/0x680 mm/page_alloc.c:4569
 alloc_pages_mpol+0x3de/0x650 mm/mempolicy.c:2133
 vm_area_alloc_pages mm/vmalloc.c:3135 [inline]
 __vmalloc_area_node mm/vmalloc.c:3211 [inline]
 __vmalloc_node_range+0x9a4/0x14a0 mm/vmalloc.c:3392
 alloc_thread_stack_node kernel/fork.c:309 [inline]
 dup_task_struct+0x3e9/0x7d0 kernel/fork.c:1114
 copy_process+0x5d1/0x3df0 kernel/fork.c:2219
 kernel_clone+0x21e/0x8d0 kernel/fork.c:2796
 __do_sys_clone3 kernel/fork.c:3097 [inline]
 __se_sys_clone3+0x2cb/0x350 kernel/fork.c:3081
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75
page last free pid 8768 tgid 8768 stack trace:
 reset_page_owner include/linux/page_owner.h:24 [inline]
 free_pages_prepare mm/page_alloc.c:1140 [inline]
 free_unref_page_prepare+0x968/0xa90 mm/page_alloc.c:2346
 free_unref_page_list+0x5a3/0x850 mm/page_alloc.c:2532
 release_pages+0x2744/0x2a80 mm/swap.c:1042
 tlb_batch_pages_flush mm/mmu_gather.c:98 [inline]
 tlb_flush_mmu_free mm/mmu_gather.c:293 [inline]
 tlb_flush_mmu+0x34d/0x4e0 mm/mmu_gather.c:300
 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:392
 exit_mmap+0x4b6/0xd40 mm/mmap.c:3300
 __mmput+0x115/0x3c0 kernel/fork.c:1345
 exit_mm+0x220/0x310 kernel/exit.c:569
 do_exit+0x99e/0x27e0 kernel/exit.c:865
 do_group_exit+0x207/0x2c0 kernel/exit.c:1027
 __do_sys_exit_group kernel/exit.c:1038 [inline]
 __se_sys_exit_group kernel/exit.c:1036 [inline]
 __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1036
 do_syscall_64+0xfb/0x240
 entry_SYSCALL_64_after_hwframe+0x6d/0x75

Memory state around the buggy address:
 ffffc900046dfb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900046dfb80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
>ffffc900046dfc00: 00 00 00 00 00 00 00 00 f1 f1 f1 f1 00 00 f2 f2
                                           ^
 ffffc900046dfc80: 00 00 f3 f3 00 00 00 00 00 00 00 00 00 00 00 00
 ffffc900046dfd00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00
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