================================================================== BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x354/0x3e0 mm/vmalloc.c:4093 Write of size 4064 at addr ffffc9000d6e9020 by task syz.0.0/5325 CPU: 0 UID: 0 PID: 5325 Comm: syz.0.0 Not tainted 6.15.0-rc2-syzkaller-00404-g8560697b23dc #0 PREEMPT(full) Hardware name: QEMU Standard PC (Q35 + ICH9, 2009), BIOS 1.16.3-debian-1.16.3-2~bpo12+1 04/01/2014 Call Trace: __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:408 [inline] print_report+0x16e/0x5b0 mm/kasan/report.c:521 kasan_report+0x143/0x180 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:-1 [inline] kasan_check_range+0x28f/0x2a0 mm/kasan/generic.c:189 __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 vrealloc_noprof+0x354/0x3e0 mm/vmalloc.c:4093 push_insn_history+0x16f/0x6b0 kernel/bpf/verifier.c:3874 do_check+0x609c/0xef50 kernel/bpf/verifier.c:19450 do_check_common+0x16e4/0x20f0 kernel/bpf/verifier.c:22776 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x16ad9/0x1d1c0 kernel/bpf/verifier.c:24033 bpf_prog_load+0x17ee/0x2250 kernel/bpf/syscall.c:2971 __sys_bpf+0x5dd/0x8b0 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f RIP: 0033:0x7f6d44b8e169 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:00007f6d45a65038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f6d44db5fa0 RCX: 00007f6d44b8e169 RDX: 0000000000000048 RSI: 00002000000017c0 RDI: 0000000000000005 RBP: 00007f6d44c10a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000001 R14: 00007f6d44db5fa0 R15: 00007fff3b5e5008 The buggy address belongs to the virtual mapping at [ffffc9000d6d9000, ffffc9000d6eb000) created by: kvrealloc_noprof+0x87/0xe0 mm/slub.c:5123 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x2d pfn:0xa7f flags: 0x7ff00000000000(node=0|zone=0|lastcpupid=0x7ff) raw: 007ff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 000000000000002d 0000000000000000 00000001ffffffff 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 0x102cc2(GFP_HIGHUSER|__GFP_NOWARN), pid 5325, tgid 5324 (syz.0.0), ts 69142753669, free_ts 39892582355 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x360a/0x37a0 mm/page_alloc.c:3700 __alloc_pages_slowpath+0x436/0x1080 mm/page_alloc.c:4521 __alloc_frozen_pages_noprof+0x40d/0x5b0 mm/page_alloc.c:4995 alloc_pages_mpol+0x339/0x690 mm/mempolicy.c:2301 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline] alloc_pages_noprof+0x121/0x190 mm/mempolicy.c:2392 vm_area_alloc_pages mm/vmalloc.c:3591 [inline] __vmalloc_area_node mm/vmalloc.c:3669 [inline] __vmalloc_node_range_noprof+0x9cb/0x1390 mm/vmalloc.c:3844 __kvmalloc_node_noprof+0x3b2/0x5a0 mm/slub.c:5048 kvrealloc_noprof+0x87/0xe0 mm/slub.c:5123 push_insn_history+0x16f/0x6b0 kernel/bpf/verifier.c:3874 do_check+0x609c/0xef50 kernel/bpf/verifier.c:19450 do_check_common+0x16e4/0x20f0 kernel/bpf/verifier.c:22776 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x16ad9/0x1d1c0 kernel/bpf/verifier.c:24033 bpf_prog_load+0x17ee/0x2250 kernel/bpf/syscall.c:2971 __sys_bpf+0x5dd/0x8b0 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5939 page last free pid 5073 tgid 5073 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] free_unref_folios+0xe0e/0x17f0 mm/page_alloc.c:2782 folios_put_refs+0x70a/0x800 mm/swap.c:992 free_pages_and_swap_cache+0x5cb/0x6a0 mm/swap_state.c:270 __tlb_batch_free_encoded_pages mm/mmu_gather.c:136 [inline] tlb_batch_pages_flush mm/mmu_gather.c:149 [inline] tlb_flush_mmu_free mm/mmu_gather.c:397 [inline] tlb_flush_mmu+0x3a9/0x690 mm/mmu_gather.c:404 tlb_finish_mmu+0xd4/0x200 mm/mmu_gather.c:496 exit_mmap+0x5b1/0xde0 mm/mmap.c:1297 __mmput+0x115/0x420 kernel/fork.c:1379 exit_mm+0x221/0x310 kernel/exit.c:589 do_exit+0x994/0x27f0 kernel/exit.c:940 do_group_exit+0x207/0x2c0 kernel/exit.c:1102 __do_sys_exit_group kernel/exit.c:1113 [inline] __se_sys_exit_group kernel/exit.c:1111 [inline] __x64_sys_exit_group+0x3f/0x40 kernel/exit.c:1111 x64_sys_call+0x26c3/0x26d0 arch/x86/include/generated/asm/syscalls_64.h:232 do_syscall_x64 arch/x86/entry/syscall_64.c:63 [inline] do_syscall_64+0xf3/0x210 arch/x86/entry/syscall_64.c:94 entry_SYSCALL_64_after_hwframe+0x77/0x7f Memory state around the buggy address: ffffc9000d6e8f00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9000d6e8f80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9000d6e9000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9000d6e9080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9000d6e9100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================