================================================================== BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x354/0x3e0 mm/vmalloc.c:4093 Write of size 2097120 at addr ffffc9001be00020 by task syz.4.116/6348 CPU: 0 UID: 0 PID: 6348 Comm: syz.4.116 Not tainted 6.14.0-syzkaller-g8582d9ab3efd #0 PREEMPT(full) Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 02/12/2025 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 check_stack_read_fixed_off kernel/bpf/verifier.c:5424 [inline] check_stack_read+0x1e18/0x2b40 kernel/bpf/verifier.c:5522 check_mem_access+0xc1a/0x2310 kernel/bpf/verifier.c:7569 check_load_mem+0x509/0xc10 kernel/bpf/verifier.c:7685 do_check+0x6e50/0xef50 kernel/bpf/verifier.c:19504 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: 0033:0x7f4792b8e169 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:00007f47909f6038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f4792db6160 RCX: 00007f4792b8e169 RDX: 0000000000000048 RSI: 0000200000000200 RDI: 0000000000000005 RBP: 00007f4792c10a68 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f4792db6160 R15: 00007ffdb7795ff8 The buggy address belongs to the virtual mapping at [ffffc9001ba00000, ffffc9001c001000) created by: kvrealloc_noprof+0x87/0xe0 mm/slub.c:5113 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4a200 flags: 0xfff00000000000(node=0|zone=1|lastcpupid=0x7ff) raw: 00fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000000 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 6348, tgid 6341 (syz.4.116), ts 202421893074, free_ts 25276911147 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f4/0x240 mm/page_alloc.c:1717 prep_new_page mm/page_alloc.c:1725 [inline] get_page_from_freelist+0x352b/0x36c0 mm/page_alloc.c:3652 __alloc_frozen_pages_noprof+0x211/0x5b0 mm/page_alloc.c:4934 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:5038 kvrealloc_noprof+0x87/0xe0 mm/slub.c:5113 push_insn_history+0x16f/0x6b0 kernel/bpf/verifier.c:3874 is_state_visited kernel/bpf/verifier.c:19199 [inline] do_check+0xac36/0xef50 kernel/bpf/verifier.c:19431 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 page last free pid 1 tgid 1 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0xde8/0x10a0 mm/page_alloc.c:2680 __free_pages mm/page_alloc.c:5044 [inline] free_contig_range+0x154/0x430 mm/page_alloc.c:6900 destroy_args+0x94/0x4b0 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x555/0x590 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x24a/0x940 init/main.c:1257 do_initcall_level+0x157/0x210 init/main.c:1319 do_initcalls+0x71/0xd0 init/main.c:1335 kernel_init_freeable+0x432/0x5d0 init/main.c:1567 kernel_init+0x1d/0x2b0 init/main.c:1457 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:153 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:245 Memory state around the buggy address: ffffc9001bdfff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9001bdfff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9001be00000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9001be00080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9001be00100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================