[ 24.112138] BUG: Bad rss-counter state mm:000000002e9d2fa2 type:MM_FILEPAGES val:33 [ 24.113312] BUG: Bad rss-counter state mm:000000002e9d2fa2 type:MM_ANONPAGES val:22 [ 24.146540] ================================================================== [ 24.147465] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.148412] Read of size 8 at addr ffff88801bc7b058 by task sshd/219 [ 24.149182] [ 24.149403] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.150502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.151498] Call Trace: [ 24.151822] [ 24.152134] dump_stack_lvl+0x91/0xf0 [ 24.152632] print_report+0xcc/0x620 [ 24.153122] ? __virt_addr_valid+0x102/0x340 [ 24.153681] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.154305] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.154935] kasan_report+0xbe/0xf0 [ 24.155411] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.156041] vma_interval_tree_remove+0xc75/0xec0 [ 24.156653] vma_prepare+0xc54/0x11a0 [ 24.157141] __split_vma+0x5af/0x950 [ 24.157616] ? __pfx___split_vma+0x10/0x10 [ 24.158144] ? find_held_lock+0x2c/0x110 [ 24.158671] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.159255] ? lock_is_held_type+0x9f/0x120 [ 24.159797] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.160406] ? mtree_range_walk+0x632/0x900 [ 24.160970] ? mas_walk+0x5c7/0x7c0 [ 24.161449] do_vmi_munmap+0x1f1/0x2b0 [ 24.161955] mmap_region+0x1f9/0x2660 [ 24.162441] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.162971] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.163683] ? __pfx_lock_acquire+0x10/0x10 [ 24.164220] ? __pfx_mmap_region+0x10/0x10 [ 24.164759] ? security_mmap_addr+0x7d/0xa0 [ 24.165296] ? get_unmapped_area+0x1f5/0x3f0 [ 24.165855] do_mmap+0x854/0xf00 [ 24.166302] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.166798] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.167379] ksys_mmap_pgoff+0x3af/0x500 [ 24.167886] do_syscall_64+0x3f/0x90 [ 24.168368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.169020] RIP: 0033:0x7efe3b667d82 [ 24.169483] 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 [ 24.171632] RSP: 002b:00007ffdd7d4b508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.172554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe3b667d82 [ 24.173403] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe3aaa1000 [ 24.174242] RBP: 00007efe3aaa1000 R08: 0000000000000009 R09: 0000000000001000 [ 24.175101] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ab42527ec0 [ 24.175956] R13: 00007ffdd7d4b520 R14: 00007ffdd7d4b550 R15: 00007ffdd7d4b8b0 [ 24.176825] [ 24.177125] [ 24.177345] Allocated by task 209: [ 24.177781] kasan_save_stack+0x22/0x50 [ 24.178283] kasan_set_track+0x25/0x30 [ 24.178783] __kasan_slab_alloc+0x59/0x70 [ 24.179333] kmem_cache_alloc+0x16b/0x370 [ 24.179850] vm_area_dup+0x20/0x160 [ 24.180316] __split_vma+0x170/0x950 [ 24.180786] split_vma+0xc6/0x110 [ 24.181230] mprotect_fixup+0x8d2/0xb30 [ 24.181732] do_mprotect_pkey+0x87e/0xd40 [ 24.182256] __x64_sys_mprotect+0x78/0xc0 [ 24.182784] do_syscall_64+0x3f/0x90 [ 24.183274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.183940] [ 24.184152] Freed by task 32: [ 24.184538] kasan_save_stack+0x22/0x50 [ 24.185048] kasan_set_track+0x25/0x30 [ 24.185544] kasan_save_free_info+0x2b/0x50 [ 24.186121] __kasan_slab_free+0x10a/0x190 [ 24.186677] kmem_cache_free+0x10d/0x4d0 [ 24.187200] rcu_core+0x8c8/0x2860 [ 24.187650] __do_softirq+0x1b7/0x7d4 [ 24.188146] [ 24.188365] Last potentially related work creation: [ 24.188957] kasan_save_stack+0x22/0x50 [ 24.189478] __kasan_record_aux_stack+0x8e/0xa0 [ 24.190074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.190725] remove_vma+0x139/0x170 [ 24.191195] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.191764] do_vmi_munmap+0x1f1/0x2b0 [ 24.192261] __vm_munmap+0x138/0x3a0 [ 24.192735] __x64_sys_munmap+0x59/0x80 [ 24.193230] do_syscall_64+0x3f/0x90 [ 24.193714] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.194372] [ 24.194592] The buggy address belongs to the object at ffff88801bc7b000 [ 24.194592] which belongs to the cache vm_area_struct of size 168 [ 24.196066] The buggy address is located 88 bytes inside of [ 24.196066] freed 168-byte region [ffff88801bc7b000, ffff88801bc7b0a8) [ 24.197471] [ 24.197686] The buggy address belongs to the physical page: [ 24.198353] page:000000004ae48801 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc7b [ 24.199465] memcg:ffff88801bc72201 [ 24.199900] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.200557] page_type: 0xffffffff() [ 24.201018] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.201958] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801bc72201 [ 24.202894] page dumped because: kasan: bad access detected [ 24.203561] [ 24.203779] Memory state around the buggy address: [ 24.204360] ffff88801bc7af00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 24.205237] ffff88801bc7af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 24.206093] >ffff88801bc7b000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.206949] ^ [ 24.207682] ffff88801bc7b080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 24.208541] ffff88801bc7b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.209393] ================================================================== [ 24.210548] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.589482] BUG: Bad rss-counter state mm:000000002038cf81 type:MM_FILEPAGES val:33 [ 26.590646] BUG: Bad rss-counter state mm:000000002038cf81 type:MM_ANONPAGES val:22 [ 27.022159] BUG: Bad rss-counter state mm:0000000064e89da1 type:MM_FILEPAGES val:33 [ 27.023341] BUG: Bad rss-counter state mm:0000000064e89da1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44532' (ECDSA) to the list of known hosts. 2023/06/21 01:08:47 fuzzer started 2023/06/21 01:08:47 dialing manager at localhost:36067 2023/06/21 01:08:47 checking machine... 2023/06/21 01:08:47 checking revisions... [ 27.633955] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:08:47 testing simple program... [ 27.684379] cgroup: Unknown subsys name 'net' [ 27.738489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:08:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001fcdeea RSI=ffffffff83867afd RDI=ffff88800fe6f7c0 RBP=ffff88800fe6f790 RSP=ffff88800fe6f6e8 R8 =0000000000000001 R9 =ffff88800fe6f738 R10=0000000000038001 R11=000000000008b92e R12=ffff88800fe6f7c0 R13=0000000000000000 R14=ffff888016441b40 R15=0000000000000024 RIP=ffffffff813ad47f 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 00007f86e7ec2900 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=00007ffda4461000 CR3=000000000e5ac000 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=6720646572637465733a4d41503d706f 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 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=0000000000000001 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=00007f36eca14cd0 CR3=000000000ecdc000 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=2036343a38303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a38303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000