================================================================== BUG: KASAN: vmalloc-out-of-bounds in vrealloc_noprof+0x132/0x320 mm/vmalloc.c:4093 Write of size 4064 at addr ffffc90002dfe020 by task syz.5.3197/16547 CPU: 0 UID: 0 PID: 16547 Comm: syz.5.3197 Not tainted 6.15.0-rc3-syzkaller-00032-ga79be02bba5c #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+0x116/0x1f0 lib/dump_stack.c:120 print_address_description mm/kasan/report.c:408 [inline] print_report+0xc3/0x670 mm/kasan/report.c:521 kasan_report+0xe0/0x110 mm/kasan/report.c:634 check_region_inline mm/kasan/generic.c:183 [inline] kasan_check_range+0xef/0x1a0 mm/kasan/generic.c:189 __asan_memset+0x23/0x50 mm/kasan/shadow.c:84 vrealloc_noprof+0x132/0x320 mm/vmalloc.c:4093 push_insn_history+0x2ae/0x6c0 kernel/bpf/verifier.c:3874 do_check kernel/bpf/verifier.c:19450 [inline] do_check_common+0xbd3/0xc2a0 kernel/bpf/verifier.c:22776 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x7f51/0xb460 kernel/bpf/verifier.c:24033 bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2971 __sys_bpf+0x433c/0x4d80 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5939 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e RIP: 0023:0xf70de579 Code: b8 01 10 06 03 74 b4 01 10 07 03 74 b0 01 10 08 03 74 d8 01 00 00 00 00 00 00 00 00 00 00 00 00 00 51 52 55 89 e5 0f 34 cd 80 <5d> 5a 59 c3 90 90 90 90 8d b4 26 00 00 00 00 8d b4 26 00 00 00 00 RSP: 002b:00000000f50ce55c EFLAGS: 00000296 ORIG_RAX: 0000000000000165 RAX: ffffffffffffffda RBX: 0000000000000005 RCX: 00000000800017c0 RDX: 0000000000000048 RSI: 0000000000000000 RDI: 0000000000000000 RBP: 0000000000000000 R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000296 R12: 0000000000000000 R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000 The buggy address belongs to the virtual mapping at [ffffc90002dde000, ffffc90002e00000) created by: kvrealloc_noprof+0x7d/0xd0 mm/slub.c:5123 The buggy address belongs to the physical page: page: refcount:1 mapcount:0 mapping:0000000000000000 index:0x106 pfn:0x6b497 flags: 0x4fff00000000000(node=1|zone=1|lastcpupid=0x7ff) raw: 04fff00000000000 0000000000000000 dead000000000122 0000000000000000 raw: 0000000000000106 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 16547, tgid 16546 (syz.5.3197), ts 392388203176, free_ts 389759046784 set_page_owner include/linux/page_owner.h:32 [inline] post_alloc_hook+0x181/0x1b0 mm/page_alloc.c:1718 prep_new_page mm/page_alloc.c:1726 [inline] get_page_from_freelist+0x135c/0x3920 mm/page_alloc.c:3688 __alloc_pages_slowpath mm/page_alloc.c:4509 [inline] __alloc_frozen_pages_noprof+0x5a8/0x23a0 mm/page_alloc.c:4983 alloc_pages_mpol+0x1fb/0x550 mm/mempolicy.c:2301 alloc_frozen_pages_noprof mm/mempolicy.c:2372 [inline] alloc_pages_noprof+0x131/0x390 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+0x732/0x1540 mm/vmalloc.c:3844 __kvmalloc_node_noprof+0x2ff/0x600 mm/slub.c:5048 kvrealloc_noprof+0x7d/0xd0 mm/slub.c:5123 push_insn_history+0x2ae/0x6c0 kernel/bpf/verifier.c:3874 do_check kernel/bpf/verifier.c:19450 [inline] do_check_common+0xbd3/0xc2a0 kernel/bpf/verifier.c:22776 do_check_main kernel/bpf/verifier.c:22867 [inline] bpf_check+0x7f51/0xb460 kernel/bpf/verifier.c:24033 bpf_prog_load+0xe41/0x2490 kernel/bpf/syscall.c:2971 __sys_bpf+0x433c/0x4d80 kernel/bpf/syscall.c:5834 __do_sys_bpf kernel/bpf/syscall.c:5941 [inline] __se_sys_bpf kernel/bpf/syscall.c:5939 [inline] __ia32_sys_bpf+0x76/0xe0 kernel/bpf/syscall.c:5939 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 page last free pid 16506 tgid 16502 stack trace: reset_page_owner include/linux/page_owner.h:25 [inline] free_pages_prepare mm/page_alloc.c:1262 [inline] __free_frozen_pages+0x69d/0xff0 mm/page_alloc.c:2725 relay_destroy_buf+0x11f/0x3e0 kernel/relay.c:201 relay_remove_buf kernel/relay.c:221 [inline] kref_put include/linux/kref.h:65 [inline] relay_close_buf+0x144/0x1a0 kernel/relay.c:429 relay_close kernel/relay.c:765 [inline] relay_close+0x391/0x5d0 kernel/relay.c:751 blk_trace_free+0x37/0x170 kernel/trace/blktrace.c:316 blk_trace_cleanup kernel/trace/blktrace.c:384 [inline] __blk_trace_remove+0x7f/0x140 kernel/trace/blktrace.c:397 blk_trace_remove+0x27/0x40 kernel/trace/blktrace.c:407 sg_ioctl_common drivers/scsi/sg.c:1122 [inline] sg_ioctl+0x9c9/0x27f0 drivers/scsi/sg.c:1156 compat_ptr_ioctl+0x6b/0xa0 fs/ioctl.c:943 __do_compat_sys_ioctl fs/ioctl.c:1004 [inline] __se_compat_sys_ioctl fs/ioctl.c:947 [inline] __ia32_compat_sys_ioctl+0x24c/0x360 fs/ioctl.c:947 do_syscall_32_irqs_on arch/x86/entry/syscall_32.c:83 [inline] __do_fast_syscall_32+0x73/0x120 arch/x86/entry/syscall_32.c:306 do_fast_syscall_32+0x32/0x80 arch/x86/entry/syscall_32.c:331 entry_SYSENTER_compat_after_hwframe+0x84/0x8e Memory state around the buggy address: ffffc90002dfdf00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 ffffc90002dfdf80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 >ffffc90002dfe000: 00 00 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ^ ffffc90002dfe080: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ffffc90002dfe100: f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 f8 ================================================================== ---------------- Code disassembly (best guess), 2 bytes skipped: 0: 10 06 adc %al,(%rsi) 2: 03 74 b4 01 add 0x1(%rsp,%rsi,4),%esi 6: 10 07 adc %al,(%rdi) 8: 03 74 b0 01 add 0x1(%rax,%rsi,4),%esi c: 10 08 adc %cl,(%rax) e: 03 74 d8 01 add 0x1(%rax,%rbx,8),%esi 1e: 00 51 52 add %dl,0x52(%rcx) 21: 55 push %rbp 22: 89 e5 mov %esp,%ebp 24: 0f 34 sysenter 26: cd 80 int $0x80 * 28: 5d pop %rbp <-- trapping instruction 29: 5a pop %rdx 2a: 59 pop %rcx 2b: c3 ret 2c: 90 nop 2d: 90 nop 2e: 90 nop 2f: 90 nop 30: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi 37: 8d b4 26 00 00 00 00 lea 0x0(%rsi,%riz,1),%esi