[ 24.061851] BUG: Bad rss-counter state mm:000000002a36e839 type:MM_FILEPAGES val:33 [ 24.063063] BUG: Bad rss-counter state mm:000000002a36e839 type:MM_ANONPAGES val:22 [ 24.227742] ================================================================== [ 24.228723] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.229816] Read of size 8 at addr ffff88801b888a50 by task sshd/218 [ 24.230586] [ 24.230800] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.231685] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.232696] Call Trace: [ 24.233017] [ 24.233299] dump_stack_lvl+0x91/0xf0 [ 24.233784] print_report+0xcc/0x620 [ 24.234265] ? __virt_addr_valid+0x102/0x340 [ 24.234806] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.235448] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.236067] kasan_report+0xbe/0xf0 [ 24.236540] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.237165] vma_interval_tree_remove+0xc75/0xec0 [ 24.237768] vma_prepare+0xc54/0x11a0 [ 24.238258] __split_vma+0x5af/0x950 [ 24.238742] ? __pfx___split_vma+0x10/0x10 [ 24.239274] ? find_held_lock+0x2c/0x110 [ 24.239833] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.240404] ? lock_is_held_type+0x9f/0x120 [ 24.240943] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.241552] ? mtree_range_walk+0x632/0x900 [ 24.242108] ? mas_walk+0x5c7/0x7c0 [ 24.242593] do_vmi_munmap+0x1f1/0x2b0 [ 24.243096] mmap_region+0x1f9/0x2660 [ 24.243592] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.244110] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.244821] ? __pfx_lock_acquire+0x10/0x10 [ 24.245353] ? __pfx_mmap_region+0x10/0x10 [ 24.245886] ? security_mmap_addr+0x7d/0xa0 [ 24.246417] ? get_unmapped_area+0x1f5/0x3f0 [ 24.246963] do_mmap+0x854/0xf00 [ 24.247414] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.247918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.248476] ksys_mmap_pgoff+0x3af/0x500 [ 24.248985] do_syscall_64+0x3f/0x90 [ 24.249474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.250129] RIP: 0033:0x7f17ddd98d82 [ 24.250581] 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 [ 24.252998] RSP: 002b:00007ffd8efe6998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.253948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f17ddd98d82 [ 24.254825] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f17dd1d2000 [ 24.255731] RBP: 00007f17dd1d2000 R08: 0000000000000009 R09: 0000000000001000 [ 24.256595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000565243c0bb20 [ 24.257452] R13: 00007ffd8efe69b0 R14: 00007ffd8efe69e0 R15: 00007ffd8efe6d40 [ 24.258340] [ 24.258632] [ 24.258846] Allocated by task 209: [ 24.259293] kasan_save_stack+0x22/0x50 [ 24.259836] kasan_set_track+0x25/0x30 [ 24.260339] __kasan_slab_alloc+0x59/0x70 [ 24.260861] kmem_cache_alloc+0x16b/0x370 [ 24.261375] vm_area_dup+0x20/0x160 [ 24.261825] __split_vma+0x170/0x950 [ 24.262291] split_vma+0xc6/0x110 [ 24.262736] mprotect_fixup+0x8d2/0xb30 [ 24.263232] do_mprotect_pkey+0x87e/0xd40 [ 24.263769] __x64_sys_mprotect+0x78/0xc0 [ 24.264322] do_syscall_64+0x3f/0x90 [ 24.264803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.265448] [ 24.265661] Freed by task 209: [ 24.266069] kasan_save_stack+0x22/0x50 [ 24.266582] kasan_set_track+0x25/0x30 [ 24.267079] kasan_save_free_info+0x2b/0x50 [ 24.267618] __kasan_slab_free+0x10a/0x190 [ 24.268150] kmem_cache_free+0x10d/0x4d0 [ 24.268661] rcu_core+0x8c8/0x2860 [ 24.269108] __do_softirq+0x1b7/0x7d4 [ 24.269587] [ 24.269871] Last potentially related work creation: [ 24.270455] kasan_save_stack+0x22/0x50 [ 24.270953] __kasan_record_aux_stack+0x8e/0xa0 [ 24.271544] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.272186] remove_vma+0x139/0x170 [ 24.272633] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.273220] do_vmi_munmap+0x1f1/0x2b0 [ 24.273735] __vm_munmap+0x138/0x3a0 [ 24.274217] __x64_sys_munmap+0x59/0x80 [ 24.274729] do_syscall_64+0x3f/0x90 [ 24.275213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.275867] [ 24.276111] The buggy address belongs to the object at ffff88801b8889f8 [ 24.276111] which belongs to the cache vm_area_struct of size 168 [ 24.277612] The buggy address is located 88 bytes inside of [ 24.277612] freed 168-byte region [ffff88801b8889f8, ffff88801b888aa0) [ 24.279082] [ 24.279313] The buggy address belongs to the physical page: [ 24.280022] page:00000000cf6ac5b5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b888 [ 24.281154] memcg:ffff88801b864801 [ 24.281604] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.282280] page_type: 0xffffffff() [ 24.282761] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.283724] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801b864801 [ 24.284655] page dumped because: kasan: bad access detected [ 24.285334] [ 24.285560] Memory state around the buggy address: [ 24.286134] ffff88801b888900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.286983] ffff88801b888980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.287857] >ffff88801b888a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.288733] ^ [ 24.289489] ffff88801b888a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 24.290394] ffff88801b888b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.291301] ================================================================== [ 24.292334] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.931335] BUG: Bad rss-counter state mm:0000000078195cab type:MM_FILEPAGES val:33 [ 26.932053] BUG: Bad rss-counter state mm:0000000078195cab type:MM_ANONPAGES val:22 [ 27.421472] BUG: Bad rss-counter state mm:00000000d35f569a type:MM_FILEPAGES val:33 [ 27.422804] BUG: Bad rss-counter state mm:00000000d35f569a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14189' (ECDSA) to the list of known hosts. 2023/06/21 01:23:22 fuzzer started 2023/06/21 01:23:22 dialing manager at localhost:36067 2023/06/21 01:23:22 checking machine... 2023/06/21 01:23:22 checking revisions... [ 28.191920] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:23:23 testing simple program... [ 28.233660] cgroup: Unknown subsys name 'net' [ 28.293264] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:23:22 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=ffff88806ce09f01 RSI=ffff88806ce09fb8 RDI=ffff88806ce09aa8 RBP=ffff88806ce09fb8 RSP=ffff88806ce099f0 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09fb8 R15=ffff88806ce09a98 RIP=ffffffff811304c9 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 0000000000000000 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=00007f98fc9caa20 CR3=0000000008ed8000 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=2032323a33323a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a33323a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff85492ba0 RBX=ffffffff85d3e490 RCX=0000000000000000 RDX=0000000000000002 RSI=ffffffff849053a0 RDI=ffffffff87f346c0 RBP=ffff888018abc188 RSP=ffff888015a57ce0 R8 =0000000000000000 R9 =0000000000000000 R10=0000000000000007 R11=00000000000b6a61 R12=ffffffff87f346c0 R13=0000000000000000 R14=ffffffff87b6a200 R15=ffff888018abc1e8 RIP=ffffffff812c19c7 RFL=00000286 [--S--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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4def3f8900 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=00007ffd3fba3000 CR3=000000000e0c8000 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