[ 31.384765] BUG: Bad rss-counter state mm:000000007478efcc type:MM_FILEPAGES val:33 [ 31.384797] BUG: Bad rss-counter state mm:000000007478efcc type:MM_ANONPAGES val:22 [ 31.550698] ================================================================== [ 31.551611] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.552568] Read of size 8 at addr ffff8880168afed8 by task sshd/219 [ 31.553344] [ 31.553660] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.554539] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.555530] Call Trace: [ 31.555850] [ 31.556135] dump_stack_lvl+0x91/0xf0 [ 31.556633] print_report+0xcc/0x620 [ 31.557121] ? __virt_addr_valid+0x102/0x340 [ 31.557706] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.558336] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.558967] kasan_report+0xbe/0xf0 [ 31.559450] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.560073] vma_interval_tree_remove+0xc75/0xec0 [ 31.560687] vma_prepare+0xc54/0x11a0 [ 31.561177] __split_vma+0x5af/0x950 [ 31.561668] ? __pfx___split_vma+0x10/0x10 [ 31.562215] ? find_held_lock+0x2c/0x110 [ 31.562747] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.563327] ? lock_is_held_type+0x9f/0x120 [ 31.563884] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.564506] ? mtree_range_walk+0x632/0x900 [ 31.565069] ? mas_walk+0x5c7/0x7c0 [ 31.565570] do_vmi_munmap+0x1f1/0x2b0 [ 31.566079] mmap_region+0x1f9/0x2660 [ 31.566579] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.567105] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.567836] ? __pfx_lock_acquire+0x10/0x10 [ 31.568385] ? __pfx_mmap_region+0x10/0x10 [ 31.568931] ? security_mmap_addr+0x7d/0xa0 [ 31.569483] ? get_unmapped_area+0x1f5/0x3f0 [ 31.570043] do_mmap+0x854/0xf00 [ 31.570490] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.570993] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.571565] ksys_mmap_pgoff+0x3af/0x500 [ 31.572077] do_syscall_64+0x3f/0x90 [ 31.572569] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.573236] RIP: 0033:0x7f60f51add82 [ 31.573717] Code: eb aa 66 0f 1f 44 00 00 41 f7 c1 ff 0f 00 00 75 27 55 48 89 fd 53 89 cb 48 85 ff 74 33 41 89 da 48 89 ef b8 09 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 56 5b 5d c3 0f 1f 00 c7 05 ae 03 01 00 16 00 [ 31.575887] RSP: 002b:00007ffc7a7680d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.576808] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f60f51add82 [ 31.577696] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f60f45e7000 [ 31.578565] RBP: 00007f60f45e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.579426] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e6811e0ec0 [ 31.580291] R13: 00007ffc7a7680f0 R14: 00007ffc7a768120 R15: 00007ffc7a768480 [ 31.581171] [ 31.581476] [ 31.581696] Allocated by task 207: [ 31.582127] kasan_save_stack+0x22/0x50 [ 31.582639] kasan_set_track+0x25/0x30 [ 31.583137] __kasan_slab_alloc+0x59/0x70 [ 31.583673] kmem_cache_alloc+0x16b/0x370 [ 31.584197] vm_area_dup+0x20/0x160 [ 31.584649] __split_vma+0x170/0x950 [ 31.585130] split_vma+0xc6/0x110 [ 31.585612] mprotect_fixup+0x8d2/0xb30 [ 31.586127] do_mprotect_pkey+0x87e/0xd40 [ 31.586656] __x64_sys_mprotect+0x78/0xc0 [ 31.587183] do_syscall_64+0x3f/0x90 [ 31.587664] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.588321] [ 31.588542] Freed by task 207: [ 31.588949] kasan_save_stack+0x22/0x50 [ 31.589467] kasan_set_track+0x25/0x30 [ 31.589970] kasan_save_free_info+0x2b/0x50 [ 31.590513] __kasan_slab_free+0x10a/0x190 [ 31.591061] kmem_cache_free+0x10d/0x4d0 [ 31.591580] rcu_core+0x8c8/0x2860 [ 31.592034] __do_softirq+0x1b7/0x7d4 [ 31.592522] [ 31.592741] Last potentially related work creation: [ 31.593349] kasan_save_stack+0x22/0x50 [ 31.593852] __kasan_record_aux_stack+0x8e/0xa0 [ 31.594432] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.595080] remove_vma+0x139/0x170 [ 31.595532] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.596085] do_vmi_munmap+0x1f1/0x2b0 [ 31.596575] __vm_munmap+0x138/0x3a0 [ 31.597037] __x64_sys_munmap+0x59/0x80 [ 31.597537] do_syscall_64+0x3f/0x90 [ 31.598008] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.598643] [ 31.598857] The buggy address belongs to the object at ffff8880168afe80 [ 31.598857] which belongs to the cache vm_area_struct of size 168 [ 31.600301] The buggy address is located 88 bytes inside of [ 31.600301] freed 168-byte region [ffff8880168afe80, ffff8880168aff28) [ 31.601707] [ 31.601923] The buggy address belongs to the physical page: [ 31.602576] page:0000000043ae698d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168af [ 31.603661] memcg:ffff88800c4d8801 [ 31.604082] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.604732] page_type: 0xffffffff() [ 31.605181] raw: 0100000000000200 ffff8880087a0c80 ffffea00003c8340 dead000000000006 [ 31.606104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4d8801 [ 31.606995] page dumped because: kasan: bad access detected [ 31.607644] [ 31.607857] Memory state around the buggy address: [ 31.608425] ffff8880168afd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.609274] ffff8880168afe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.610152] >ffff8880168afe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.610997] ^ [ 31.611724] ffff8880168aff00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.612585] ffff8880168aff80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.613456] ================================================================== [ 31.614716] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.108056] BUG: Bad rss-counter state mm:0000000084732b15 type:MM_FILEPAGES val:33 [ 33.109242] BUG: Bad rss-counter state mm:0000000084732b15 type:MM_ANONPAGES val:22 [ 33.536169] BUG: Bad rss-counter state mm:00000000807b5b99 type:MM_FILEPAGES val:33 [ 33.537361] BUG: Bad rss-counter state mm:00000000807b5b99 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13150' (ECDSA) to the list of known hosts. 2023/06/20 17:32:55 fuzzer started 2023/06/20 17:32:55 dialing manager at localhost:36067 2023/06/20 17:32:55 checking machine... 2023/06/20 17:32:55 checking revisions... [ 34.288245] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:32:55 testing simple program... [ 34.341484] cgroup: Unknown subsys name 'net' [ 34.382444] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:32:55 Registers: info registers vcpu 0 RAX=ffffffff81370a8a RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015ef7c01 RSI=ffff888015ef7c98 RDI=ffff888015ef7c98 RBP=ffff888015ef7988 RSP=ffff888015ef78c0 R8 =ffffffff86139622 R9 =ffff888015ef7970 R10=0000000000038001 R11=0000000000020ed2 R12=ffff888015ef7990 R13=ffff888015ef7978 R14=ffff888015ef7ca0 R15=ffff888015ef7930 RIP=ffffffff81131041 RFL=00000202 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe37f946900 00000000 00000000 GS =0000 ffff88806ce00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe0000003000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000001000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007fe1ef612dc0 CR3=00000000101fe000 CR4=00350ef0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 ES =0000 0000000000000000 00000000 00000000 CS =0010 0000000000000000 ffffffff 00a09b00 DPL=0 CS64 [-RA] SS =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 0000000000000000 00000000 00000000 GS =0000 ffff88806cf00000 00000000 00000000 LDT=0000 fffffe0000000000 00000000 00000000 TR =0040 fffffe000004a000 00004087 00008b00 DPL=0 TSS64-busy GDT= fffffe0000048000 0000007f IDT= fffffe0000000000 00000fff CR0=80050033 CR2=00007ffddb614998 CR3=0000000005482000 CR4=00350ee0 DR0=0000000000000000 DR1=0000000000000000 DR2=0000000000000000 DR3=0000000000000000 DR6=00000000ffff0ff0 DR7=0000000000000400 EFER=0000000000000d01 FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80 FPR0=0000000000000000 0000 FPR1=0000000000000000 0000 FPR2=0000000000000000 0000 FPR3=0000000000000000 0000 FPR4=0000000000000000 0000 FPR5=0000000000000000 0000 FPR6=0000000000000000 0000 FPR7=0000000000000000 0000 XMM00=00000000000000000000000000000000 XMM01=00007f63e33015100000556e1fa09790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000