[ 23.645514] BUG: Bad rss-counter state mm:000000004d8518ac type:MM_FILEPAGES val:33 [ 23.646542] BUG: Bad rss-counter state mm:000000004d8518ac type:MM_ANONPAGES val:22 [ 23.811321] ================================================================== [ 23.812405] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.813639] Read of size 8 at addr ffff88800eb6ea50 by task sshd/219 [ 23.814501] [ 23.814719] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.815599] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.816586] Call Trace: [ 23.816913] <TASK> [ 23.817202] dump_stack_lvl+0x91/0xf0 [ 23.817711] print_report+0xcc/0x620 [ 23.818202] ? __virt_addr_valid+0x102/0x340 [ 23.818759] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.819386] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.820024] kasan_report+0xbe/0xf0 [ 23.820504] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.821138] vma_interval_tree_remove+0xc75/0xec0 [ 23.821764] vma_prepare+0xc54/0x11a0 [ 23.822254] __split_vma+0x5af/0x950 [ 23.822731] ? __pfx___split_vma+0x10/0x10 [ 23.823278] ? find_held_lock+0x2c/0x110 [ 23.823812] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.824385] ? lock_is_held_type+0x9f/0x120 [ 23.824928] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.825556] ? mtree_range_walk+0x632/0x900 [ 23.826115] ? mas_walk+0x5c7/0x7c0 [ 23.826598] do_vmi_munmap+0x1f1/0x2b0 [ 23.827092] mmap_region+0x1f9/0x2660 [ 23.827578] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.828094] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.828820] ? __pfx_lock_acquire+0x10/0x10 [ 23.829358] ? __pfx_mmap_region+0x10/0x10 [ 23.829885] ? security_mmap_addr+0x7d/0xa0 [ 23.830426] ? get_unmapped_area+0x1f5/0x3f0 [ 23.830979] do_mmap+0x854/0xf00 [ 23.831426] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.831926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.832493] ksys_mmap_pgoff+0x3af/0x500 [ 23.832998] do_syscall_64+0x3f/0x90 [ 23.833493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.834142] RIP: 0033:0x7fe4915b8d82 [ 23.834604] 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 [ 23.836763] RSP: 002b:00007ffeab705978 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.837682] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe4915b8d82 [ 23.838556] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe4909f2000 [ 23.839414] RBP: 00007fe4909f2000 R08: 0000000000000009 R09: 0000000000001000 [ 23.840272] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559a7bee2ec0 [ 23.841124] R13: 00007ffeab705990 R14: 00007ffeab7059c0 R15: 00007ffeab705d20 [ 23.841987] </TASK> [ 23.842286] [ 23.842506] Allocated by task 212: [ 23.842940] kasan_save_stack+0x22/0x50 [ 23.843444] kasan_set_track+0x25/0x30 [ 23.843940] __kasan_slab_alloc+0x59/0x70 [ 23.844464] kmem_cache_alloc+0x16b/0x370 [ 23.844984] vm_area_dup+0x20/0x160 [ 23.845454] __split_vma+0x170/0x950 [ 23.845925] split_vma+0xc6/0x110 [ 23.846364] mprotect_fixup+0x8d2/0xb30 [ 23.846863] do_mprotect_pkey+0x87e/0xd40 [ 23.847386] __x64_sys_mprotect+0x78/0xc0 [ 23.847905] do_syscall_64+0x3f/0x90 [ 23.848380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.849028] [ 23.849247] Freed by task 19: [ 23.849633] kasan_save_stack+0x22/0x50 [ 23.850149] kasan_set_track+0x25/0x30 [ 23.850645] kasan_save_free_info+0x2b/0x50 [ 23.851174] __kasan_slab_free+0x10a/0x190 [ 23.851719] kmem_cache_free+0x10d/0x4d0 [ 23.852228] rcu_core+0x8c8/0x2860 [ 23.852677] __do_softirq+0x1b7/0x7d4 [ 23.853157] [ 23.853392] Last potentially related work creation: [ 23.853980] kasan_save_stack+0x22/0x50 [ 23.854487] __kasan_record_aux_stack+0x8e/0xa0 [ 23.855063] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.855708] remove_vma+0x139/0x170 [ 23.856164] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.856726] do_vmi_munmap+0x1f1/0x2b0 [ 23.857220] __vm_munmap+0x138/0x3a0 [ 23.857693] __x64_sys_munmap+0x59/0x80 [ 23.858196] do_syscall_64+0x3f/0x90 [ 23.858683] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.859335] [ 23.859554] The buggy address belongs to the object at ffff88800eb6e9f8 [ 23.859554] which belongs to the cache vm_area_struct of size 168 [ 23.861033] The buggy address is located 88 bytes inside of [ 23.861033] freed 168-byte region [ffff88800eb6e9f8, ffff88800eb6eaa0) [ 23.862461] [ 23.862683] The buggy address belongs to the physical page: [ 23.863346] page:000000007a81db1f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb6e [ 23.864437] memcg:ffff88800fd4de01 [ 23.864873] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.865542] page_type: 0xffffffff() [ 23.866003] raw: 0100000000000200 ffff8880087a0c80 ffffea000039adc0 dead000000000002 [ 23.866934] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fd4de01 [ 23.867856] page dumped because: kasan: bad access detected [ 23.868521] [ 23.868743] Memory state around the buggy address: [ 23.869340] ffff88800eb6e900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.870205] ffff88800eb6e980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 23.871075] >ffff88800eb6ea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.871945] ^ [ 23.872655] ffff88800eb6ea80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 23.873520] ffff88800eb6eb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.874386] ================================================================== [ 23.875500] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.447241] BUG: Bad rss-counter state mm:00000000e9a450de type:MM_FILEPAGES val:33 [ 26.448414] BUG: Bad rss-counter state mm:00000000e9a450de type:MM_ANONPAGES val:22 [ 26.850683] BUG: Bad rss-counter state mm:000000007a39c6e1 type:MM_FILEPAGES val:33 [ 26.851858] BUG: Bad rss-counter state mm:000000007a39c6e1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36687' (ECDSA) to the list of known hosts. 2023/06/20 20:22:27 fuzzer started 2023/06/20 20:22:27 dialing manager at localhost:36067 2023/06/20 20:22:27 checking machine... 2023/06/20 20:22:27 checking revisions... [ 27.549108] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:22:27 testing simple program... [ 27.622673] cgroup: Unknown subsys name 'net' [ 27.711156] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:22:27 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888014757928 RCX=0000000000000000 RDX=ffff888015f9d1c0 RSI=ffffffff81f39c1e RDI=00000000fffffffe RBP=ffff888014757918 RSP=ffff888014757830 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0030733a745f6c65 R12=ffff888014757928 R13=ffff888008dfc0d8 R14=ffff888008dfc000 R15=ffff88800b804808 RIP=ffffffff81f54a38 RFL=00000282 [--S----] 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 00007f882f195900 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=00007f882e6b3020 CR3=000000000d4b4000 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=67b28ddd5e4e13b9384bdc85ec54572c XMM02=eff9b2d0a8fce9cb000000000011dcb8 XMM03=2c67c8bc2e329bc3000000000011dde0 XMM04=a73debc61462dc5000000000000ae988 XMM05=68e55b0827080fd60000000000132da8 XMM06=dfcdbad4f1609c3700000000001318d0 XMM07=fb795ef6d65770560000000000121a50 XMM08=2c67c8bc2e329bc3000000000011dde0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8180803a RDX=0000000000000002 RSI=ffffffff861386ee RDI=ffffffff85dfdb08 RBP=ffffffff85dfdb08 RSP=ffff88801467eee0 R8 =ffffffff861386ee R9 =ffff88801467efd8 R10=0000000000038001 R11=0000000000020c51 R12=ffffffff85dfdb10 R13=ffffffff85dfdb08 R14=ffffffff85dfdb08 R15=dffffc0000000000 RIP=ffffffff8112fc6e RFL=00000212 [----A--] 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 00007fe6791b2900 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=00007fe679191020 CR3=000000000e03a000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000