[ 30.924095] BUG: Bad rss-counter state mm:0000000045e946d3 type:MM_FILEPAGES val:33 [ 30.925890] BUG: Bad rss-counter state mm:0000000045e946d3 type:MM_ANONPAGES val:22 [ 31.098555] ================================================================== [ 31.099484] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.100429] Read of size 8 at addr ffff88800f1e9880 by task sshd/219 [ 31.101209] [ 31.101628] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.102484] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.103472] Call Trace: [ 31.103811] [ 31.104104] dump_stack_lvl+0x91/0xf0 [ 31.104608] print_report+0xcc/0x620 [ 31.105099] ? __virt_addr_valid+0x102/0x340 [ 31.105646] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106275] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.106894] kasan_report+0xbe/0xf0 [ 31.107370] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.107999] vma_interval_tree_remove+0xc75/0xec0 [ 31.108597] vma_prepare+0xc54/0x11a0 [ 31.109083] __split_vma+0x5af/0x950 [ 31.109551] ? __pfx___split_vma+0x10/0x10 [ 31.110078] ? find_held_lock+0x2c/0x110 [ 31.110606] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.111163] ? lock_is_held_type+0x9f/0x120 [ 31.111700] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.112333] ? mtree_range_walk+0x632/0x900 [ 31.112882] ? mas_walk+0x5c7/0x7c0 [ 31.113354] do_vmi_munmap+0x1f1/0x2b0 [ 31.113845] mmap_region+0x1f9/0x2660 [ 31.114325] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.114844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.115576] ? __pfx_lock_acquire+0x10/0x10 [ 31.116112] ? __pfx_mmap_region+0x10/0x10 [ 31.116645] ? security_mmap_addr+0x7d/0xa0 [ 31.117184] ? get_unmapped_area+0x1f5/0x3f0 [ 31.117736] do_mmap+0x854/0xf00 [ 31.118185] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.118673] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.119235] ksys_mmap_pgoff+0x3af/0x500 [ 31.119753] do_syscall_64+0x3f/0x90 [ 31.120240] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.120895] RIP: 0033:0x7f0f4e519d82 [ 31.121364] 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 [ 31.123543] RSP: 002b:00007ffdb553f528 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.124486] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0f4e519d82 [ 31.125342] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0f4d953000 [ 31.126194] RBP: 00007f0f4d953000 R08: 0000000000000009 R09: 0000000000001000 [ 31.127045] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a35f36ec0 [ 31.127885] R13: 00007ffdb553f540 R14: 00007ffdb553f570 R15: 00007ffdb553f8d0 [ 31.128748] [ 31.129038] [ 31.129251] Allocated by task 211: [ 31.129678] kasan_save_stack+0x22/0x50 [ 31.130179] kasan_set_track+0x25/0x30 [ 31.130667] __kasan_slab_alloc+0x59/0x70 [ 31.131184] kmem_cache_alloc+0x16b/0x370 [ 31.131697] vm_area_dup+0x20/0x160 [ 31.132191] __split_vma+0x170/0x950 [ 31.132654] split_vma+0xc6/0x110 [ 31.133091] mprotect_fixup+0x8d2/0xb30 [ 31.133594] do_mprotect_pkey+0x87e/0xd40 [ 31.134119] __x64_sys_mprotect+0x78/0xc0 [ 31.134631] do_syscall_64+0x3f/0x90 [ 31.135100] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.135738] [ 31.135968] Freed by task 203: [ 31.136362] kasan_save_stack+0x22/0x50 [ 31.136863] kasan_set_track+0x25/0x30 [ 31.137355] kasan_save_free_info+0x2b/0x50 [ 31.137886] __kasan_slab_free+0x10a/0x190 [ 31.138414] kmem_cache_free+0x10d/0x4d0 [ 31.138914] rcu_core+0x8c8/0x2860 [ 31.139360] __do_softirq+0x1b7/0x7d4 [ 31.139841] [ 31.140067] Last potentially related work creation: [ 31.140651] kasan_save_stack+0x22/0x50 [ 31.141154] __kasan_record_aux_stack+0x8e/0xa0 [ 31.141723] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.142355] remove_vma+0x139/0x170 [ 31.142916] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.143474] do_vmi_munmap+0x1f1/0x2b0 [ 31.143978] __vm_munmap+0x138/0x3a0 [ 31.144451] __x64_sys_munmap+0x59/0x80 [ 31.144952] do_syscall_64+0x3f/0x90 [ 31.145433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.146079] [ 31.146300] The buggy address belongs to the object at ffff88800f1e9828 [ 31.146300] which belongs to the cache vm_area_struct of size 168 [ 31.147777] The buggy address is located 88 bytes inside of [ 31.147777] freed 168-byte region [ffff88800f1e9828, ffff88800f1e98d0) [ 31.149182] [ 31.149398] The buggy address belongs to the physical page: [ 31.150063] page:00000000acf67898 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf1e9 [ 31.151132] memcg:ffff888016aedd01 [ 31.151554] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.152211] page_type: 0xffffffff() [ 31.152657] raw: 0100000000000200 ffff8880087a0c80 ffffea000067e700 dead000000000002 [ 31.153577] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016aedd01 [ 31.154475] page dumped because: kasan: bad access detected [ 31.155138] [ 31.155350] Memory state around the buggy address: [ 31.155948] ffff88800f1e9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.156803] ffff88800f1e9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.157662] >ffff88800f1e9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.158500] ^ [ 31.158913] ffff88800f1e9900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.159767] ffff88800f1e9980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.160619] ================================================================== [ 31.161576] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.052911] BUG: Bad rss-counter state mm:000000001f69008f type:MM_FILEPAGES val:33 [ 33.053805] BUG: Bad rss-counter state mm:000000001f69008f type:MM_ANONPAGES val:22 [ 33.540234] BUG: Bad rss-counter state mm:000000000911640d type:MM_FILEPAGES val:33 [ 33.541505] BUG: Bad rss-counter state mm:000000000911640d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59812' (ECDSA) to the list of known hosts. 2023/06/20 16:58:46 fuzzer started 2023/06/20 16:58:46 dialing manager at localhost:36067 2023/06/20 16:58:46 checking machine... 2023/06/20 16:58:46 checking revisions... [ 34.250376] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:58:46 testing simple program... [ 34.315888] cgroup: Unknown subsys name 'net' [ 34.389549] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff86138e01 RDX=0000000000000001 RSI=ffffffff8180ce89 RDI=ffff888014347468 RBP=ffff8880143474c0 RSP=ffff8880143473f8 R8 =ffffffff86138eb4 R9 =ffff8880143474a8 R10=0000000000038001 R11=0000000000020d9c R12=ffff8880143474c8 R13=ffff8880143474b0 R14=ffff8880143474a9 R15=ffff888014347468 RIP=ffffffff811306ec RFL=00000246 [---Z-P-] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f722b181900 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=00007f722a5c8e30 CR3=000000001415e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=94b90a9d6fb0e39100000000000ae988 XMM05=f65554318eea9dac0000000000132920 XMM06=806171799158d96700000000001313a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=1ffff11002d2afa2 RCX=0000000000000000 RDX=ffff888016957d50 RSI=ffff888016957d40 RDI=0000000000000009 RBP=0000000000000000 RSP=ffff888016957cf8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000000c R13=00007ffe8d2b9364 R14=0000000000000009 R15=0000000000000000 RIP=ffffffff83633192 RFL=00000293 [--S-A-C] 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 00007f105748c900 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=00007ffe8d2b6000 CR3=000000000eaf6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000