================================================================== BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x341/0x3d0 mm/vmalloc.c:4095 Write of size 2097120 at addr ffffc9001e000020 by task syz.4.322/7349 CPU: 0 UID: 0 PID: 7349 Comm: syz.4.322 Not tainted 6.13.0-rc2-syzkaller-00044-gf4f25b689b0d #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 11/25/2024 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:378 [inline] print_report+0x169/0x550 mm/kasan/report.c:489 kasan_report+0x143/0x180 mm/kasan/report.c:602 kasan_check_range+0x282/0x290 mm/kasan/generic.c:189 __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 vrealloc_noprof+0x341/0x3d0 mm/vmalloc.c:4095 push_insn_history+0x16f/0x6b0 kernel/bpf/verifier.c:3749 check_stack_read_fixed_off kernel/bpf/verifier.c:5293 [inline] check_stack_read+0x1db2/0x2ac0 kernel/bpf/verifier.c:5391 check_mem_access+0xbcd/0x2240 kernel/bpf/verifier.c:7443 do_check+0x9a87/0xfa40 kernel/bpf/verifier.c:18971 do_check_common+0x1b4a/0x2030 kernel/bpf/verifier.c:22152 do_check_main kernel/bpf/verifier.c:22243 [inline] bpf_check+0x19380/0x1f1b0 kernel/bpf/verifier.c:22960 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2947 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895 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: 0033:0x7f9846985d19 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:00007f9847749038 EFLAGS: 00000246 ORIG_RAX: 0000000000000141 RAX: ffffffffffffffda RBX: 00007f9846b76240 RCX: 00007f9846985d19 RDX: 0000000000000048 RSI: 0000000020000200 RDI: 0000000000000005 RBP: 00007f9846a01a20 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 0000000000000000 R14: 00007f9846b76240 R15: 00007ffe91abc968 The buggy address belongs to the virtual mapping at [ffffc9001dc00000, ffffc9001e201000) created by: kvrealloc_noprof+0xc7/0x120 mm/util.c:747 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x4c200 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 7349, tgid 7340 (syz.4.322), ts 163684955262, free_ts 14688117218 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x1f3/0x230 mm/page_alloc.c:1556 prep_new_page mm/page_alloc.c:1564 [inline] get_page_from_freelist+0x365c/0x37a0 mm/page_alloc.c:3474 __alloc_pages_noprof+0x292/0x710 mm/page_alloc.c:4751 alloc_pages_mpol_noprof+0x3e8/0x680 mm/mempolicy.c:2269 vm_area_alloc_pages mm/vmalloc.c:3589 [inline] __vmalloc_area_node mm/vmalloc.c:3667 [inline] __vmalloc_node_range_noprof+0x9c9/0x1380 mm/vmalloc.c:3844 __kvmalloc_node_noprof+0x142/0x190 mm/util.c:672 kvrealloc_noprof+0xc7/0x120 mm/util.c:747 push_insn_history+0x16f/0x6b0 kernel/bpf/verifier.c:3749 is_state_visited kernel/bpf/verifier.c:18630 [inline] do_check+0x6857/0xfa40 kernel/bpf/verifier.c:18879 do_check_common+0x1b4a/0x2030 kernel/bpf/verifier.c:22152 do_check_main kernel/bpf/verifier.c:22243 [inline] bpf_check+0x19380/0x1f1b0 kernel/bpf/verifier.c:22960 bpf_prog_load+0x1667/0x20f0 kernel/bpf/syscall.c:2947 __sys_bpf+0x4ee/0x810 kernel/bpf/syscall.c:5790 __do_sys_bpf kernel/bpf/syscall.c:5897 [inline] __se_sys_bpf kernel/bpf/syscall.c:5895 [inline] __x64_sys_bpf+0x7c/0x90 kernel/bpf/syscall.c:5895 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 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:1127 [inline] free_unref_page+0xd3f/0x1010 mm/page_alloc.c:2657 free_contig_range+0x14c/0x430 mm/page_alloc.c:6630 destroy_args+0x92/0x910 mm/debug_vm_pgtable.c:1017 debug_vm_pgtable+0x4be/0x550 mm/debug_vm_pgtable.c:1397 do_one_initcall+0x248/0x870 init/main.c:1266 do_initcall_level+0x157/0x210 init/main.c:1328 do_initcalls+0x3f/0x80 init/main.c:1344 kernel_init_freeable+0x435/0x5d0 init/main.c:1577 kernel_init+0x1d/0x2b0 init/main.c:1466 ret_from_fork+0x4b/0x80 arch/x86/kernel/process.c:147 ret_from_fork_asm+0x1a/0x30 arch/x86/entry/entry_64.S:244 Memory state around the buggy address: ffffc9001dffff00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc9001dffff80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc9001e000000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc9001e000080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc9001e000100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ==================================================================