syzkaller login: [ 30.024054] BUG: Bad rss-counter state mm:000000007e0941f8 type:MM_FILEPAGES val:33 [ 30.025733] BUG: Bad rss-counter state mm:000000007e0941f8 type:MM_ANONPAGES val:22 [ 30.195071] ================================================================== [ 30.195978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.196923] Read of size 8 at addr ffff88800e8bbed8 by task sshd/221 [ 30.197689] [ 30.197910] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.198889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.199867] Call Trace: [ 30.200185] [ 30.200471] dump_stack_lvl+0x91/0xf0 [ 30.200981] print_report+0xcc/0x620 [ 30.201475] ? __virt_addr_valid+0x102/0x340 [ 30.202035] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.202663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.203294] kasan_report+0xbe/0xf0 [ 30.203768] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.204380] vma_interval_tree_remove+0xc75/0xec0 [ 30.204982] vma_prepare+0xc54/0x11a0 [ 30.205459] __split_vma+0x5af/0x950 [ 30.205939] ? __pfx___split_vma+0x10/0x10 [ 30.206463] ? find_held_lock+0x2c/0x110 [ 30.207001] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.207561] ? lock_is_held_type+0x9f/0x120 [ 30.208098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.208704] ? mtree_range_walk+0x632/0x900 [ 30.209254] ? mas_walk+0x5c7/0x7c0 [ 30.209733] do_vmi_munmap+0x1f1/0x2b0 [ 30.210230] mmap_region+0x1f9/0x2660 [ 30.210708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.211240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.211946] ? __pfx_lock_acquire+0x10/0x10 [ 30.212471] ? __pfx_mmap_region+0x10/0x10 [ 30.213002] ? security_mmap_addr+0x7d/0xa0 [ 30.213532] ? get_unmapped_area+0x1f5/0x3f0 [ 30.214078] do_mmap+0x854/0xf00 [ 30.214515] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.215019] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.215582] ksys_mmap_pgoff+0x3af/0x500 [ 30.216097] do_syscall_64+0x3f/0x90 [ 30.216574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.217235] RIP: 0033:0x7ff57dfbdd82 [ 30.217689] 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 [ 30.219830] RSP: 002b:00007ffc6ff2e958 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.220728] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff57dfbdd82 [ 30.221577] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff57d3f7000 [ 30.222420] RBP: 00007ff57d3f7000 R08: 0000000000000009 R09: 0000000000001000 [ 30.223272] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f765baec0 [ 30.224112] R13: 00007ffc6ff2e970 R14: 00007ffc6ff2e9a0 R15: 00007ffc6ff2ed00 [ 30.224967] [ 30.225257] [ 30.225471] Allocated by task 214: [ 30.225896] kasan_save_stack+0x22/0x50 [ 30.226403] kasan_set_track+0x25/0x30 [ 30.226914] __kasan_slab_alloc+0x59/0x70 [ 30.227440] kmem_cache_alloc+0x16b/0x370 [ 30.227951] vm_area_dup+0x20/0x160 [ 30.228402] __split_vma+0x170/0x950 [ 30.228869] split_vma+0xc6/0x110 [ 30.229306] mprotect_fixup+0x8d2/0xb30 [ 30.229806] do_mprotect_pkey+0x87e/0xd40 [ 30.230322] __x64_sys_mprotect+0x78/0xc0 [ 30.230859] do_syscall_64+0x3f/0x90 [ 30.231339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.231977] [ 30.232190] Freed by task 214: [ 30.232580] kasan_save_stack+0x22/0x50 [ 30.233078] kasan_set_track+0x25/0x30 [ 30.233571] kasan_save_free_info+0x2b/0x50 [ 30.234104] __kasan_slab_free+0x10a/0x190 [ 30.234632] kmem_cache_free+0x10d/0x4d0 [ 30.235159] rcu_core+0x8c8/0x2860 [ 30.235603] __do_softirq+0x1b7/0x7d4 [ 30.236081] [ 30.236298] Last potentially related work creation: [ 30.236876] kasan_save_stack+0x22/0x50 [ 30.237381] __kasan_record_aux_stack+0x8e/0xa0 [ 30.237953] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.238596] remove_vma+0x139/0x170 [ 30.239063] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.239623] do_vmi_munmap+0x1f1/0x2b0 [ 30.240145] __vm_munmap+0x138/0x3a0 [ 30.240607] __x64_sys_munmap+0x59/0x80 [ 30.241110] do_syscall_64+0x3f/0x90 [ 30.241586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.242229] [ 30.242442] Second to last potentially related work creation: [ 30.243134] kasan_save_stack+0x22/0x50 [ 30.243633] __kasan_record_aux_stack+0x8e/0xa0 [ 30.244204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.244840] remove_vma+0x139/0x170 [ 30.245298] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.245852] do_vmi_munmap+0x1f1/0x2b0 [ 30.246335] mmap_region+0x1f9/0x2660 [ 30.246821] do_mmap+0x854/0xf00 [ 30.247252] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.247736] ksys_mmap_pgoff+0x3af/0x500 [ 30.248232] do_syscall_64+0x3f/0x90 [ 30.248705] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.249343] [ 30.249565] The buggy address belongs to the object at ffff88800e8bbe80 [ 30.249565] which belongs to the cache vm_area_struct of size 168 [ 30.251056] The buggy address is located 88 bytes inside of [ 30.251056] freed 168-byte region [ffff88800e8bbe80, ffff88800e8bbf28) [ 30.252448] [ 30.252670] The buggy address belongs to the physical page: [ 30.253324] page:000000000216f6f3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8bb [ 30.254411] memcg:ffff88800dfabd01 [ 30.254851] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.255553] page_type: 0xffffffff() [ 30.256020] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a02c0 dead000000000005 [ 30.256949] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dfabd01 [ 30.257863] page dumped because: kasan: bad access detected [ 30.258524] [ 30.258740] Memory state around the buggy address: [ 30.259338] ffff88800e8bbd80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.260189] ffff88800e8bbe00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.261045] >ffff88800e8bbe80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.261892] ^ [ 30.262619] ffff88800e8bbf00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.263474] ffff88800e8bbf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.264318] ================================================================== [ 30.265284] Disabling lock debugging due to kernel taint [ 32.180298] BUG: Bad rss-counter state mm:00000000f1fa8116 type:MM_FILEPAGES val:33 [ 32.181590] BUG: Bad rss-counter state mm:00000000f1fa8116 type:MM_ANONPAGES val:22 [ 32.652407] BUG: Bad rss-counter state mm:0000000021448f76 type:MM_FILEPAGES val:33 [ 32.653437] BUG: Bad rss-counter state mm:0000000021448f76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62862' (ECDSA) to the list of known hosts. 2023/06/20 21:59:29 fuzzer started 2023/06/20 21:59:29 dialing manager at localhost:36067 2023/06/20 21:59:29 checking machine... 2023/06/20 21:59:29 checking revisions... [ 33.403155] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:59:30 testing simple program... [ 33.452076] cgroup: Unknown subsys name 'net' [ 33.507844] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:59:29 Registers: info registers vcpu 0 RAX=00000000fffffffe RBX=00007ffd14b1ee50 RCX=0000564ad5b4a010 RDX=000000000000001d RSI=0000000000000002 RDI=0000000000000000 RBP=00007ffd14b1e2c0 RSP=00007ffd14b1e220 R8 =0000564ad55ea345 R9 =0000564ad5b4a010 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007ffd14b1e220 R14=0000000000000000 R15=00007ffd14b1ef58 RIP=0000564ad55ea3d3 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007feafda38900 00000000 00000000 GS =0000 0000000000000000 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=00007feafce3f110 CR3=000000000f60a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6d8b8fe46f678ece00000000000ae988 XMM05=1b6de6c6097bdb0b0000000000133c68 XMM06=e4cb8bb95a7664b60000000000132b20 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20202020002020202020000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138976 RDX=1ffff11002daeee5 RSI=0000000000000001 RDI=ffff888016d77728 RBP=ffff888016d77730 RSP=ffff888016d77668 R8 =ffffffff8613897a R9 =ffff888016d77718 R10=0000000000038001 R11=0000000000020cbd R12=ffff888016d77738 R13=ffff888016d77720 R14=0000000000000004 R15=ffff888016d776d8 RIP=ffffffff81131720 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efdd7013900 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=00007efdd6fdd008 CR3=0000000019c7a000 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