syzkaller login: [ 39.040718] BUG: Bad rss-counter state mm:0000000083a3d52a type:MM_FILEPAGES val:33 [ 39.042194] BUG: Bad rss-counter state mm:0000000083a3d52a type:MM_ANONPAGES val:22 [ 39.188910] ================================================================== [ 39.189831] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.190774] Read of size 8 at addr ffff88800dfe0c20 by task sshd/221 [ 39.191562] [ 39.191911] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.192775] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.193772] Call Trace: [ 39.194116] [ 39.194398] dump_stack_lvl+0x91/0xf0 [ 39.194886] print_report+0xcc/0x620 [ 39.195391] ? __virt_addr_valid+0x102/0x340 [ 39.195943] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.196562] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.197184] kasan_report+0xbe/0xf0 [ 39.197660] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.198284] vma_interval_tree_remove+0xc75/0xec0 [ 39.198887] vma_prepare+0xc54/0x11a0 [ 39.199383] __split_vma+0x5af/0x950 [ 39.199861] ? __pfx___split_vma+0x10/0x10 [ 39.200396] ? find_held_lock+0x2c/0x110 [ 39.200926] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.201504] ? lock_is_held_type+0x9f/0x120 [ 39.202055] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.202655] ? mtree_range_walk+0x632/0x900 [ 39.203213] ? mas_walk+0x5c7/0x7c0 [ 39.203703] do_vmi_munmap+0x1f1/0x2b0 [ 39.204194] mmap_region+0x1f9/0x2660 [ 39.204685] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.205204] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.205931] ? __pfx_lock_acquire+0x10/0x10 [ 39.206471] ? __pfx_mmap_region+0x10/0x10 [ 39.207008] ? security_mmap_addr+0x7d/0xa0 [ 39.207562] ? get_unmapped_area+0x1f5/0x3f0 [ 39.208112] do_mmap+0x854/0xf00 [ 39.208555] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.209051] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.209616] ksys_mmap_pgoff+0x3af/0x500 [ 39.210129] do_syscall_64+0x3f/0x90 [ 39.210608] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.211266] RIP: 0033:0x7f190202fd82 [ 39.211728] 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 [ 39.213873] RSP: 002b:00007ffd3ac3fdb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.214785] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f190202fd82 [ 39.215648] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1901469000 [ 39.216500] RBP: 00007f1901469000 R08: 0000000000000009 R09: 0000000000001000 [ 39.217353] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556710ae0b20 [ 39.218208] R13: 00007ffd3ac3fdd0 R14: 00007ffd3ac3fe00 R15: 00007ffd3ac40160 [ 39.219076] [ 39.219390] [ 39.219603] Allocated by task 214: [ 39.220039] kasan_save_stack+0x22/0x50 [ 39.220545] kasan_set_track+0x25/0x30 [ 39.221040] __kasan_slab_alloc+0x59/0x70 [ 39.221571] kmem_cache_alloc+0x16b/0x370 [ 39.222090] vm_area_dup+0x20/0x160 [ 39.222550] __split_vma+0x170/0x950 [ 39.223018] split_vma+0xc6/0x110 [ 39.223469] mprotect_fixup+0x8d2/0xb30 [ 39.223978] do_mprotect_pkey+0x87e/0xd40 [ 39.224502] __x64_sys_mprotect+0x78/0xc0 [ 39.225029] do_syscall_64+0x3f/0x90 [ 39.225510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.226161] [ 39.226377] Freed by task 214: [ 39.226778] kasan_save_stack+0x22/0x50 [ 39.227298] kasan_set_track+0x25/0x30 [ 39.227797] kasan_save_free_info+0x2b/0x50 [ 39.228332] __kasan_slab_free+0x10a/0x190 [ 39.228870] kmem_cache_free+0x10d/0x4d0 [ 39.229384] rcu_core+0x8c8/0x2860 [ 39.229829] __do_softirq+0x1b7/0x7d4 [ 39.230314] [ 39.230531] Last potentially related work creation: [ 39.231118] kasan_save_stack+0x22/0x50 [ 39.231641] __kasan_record_aux_stack+0x8e/0xa0 [ 39.232225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.232870] remove_vma+0x139/0x170 [ 39.233322] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.233883] do_vmi_munmap+0x1f1/0x2b0 [ 39.234377] __vm_munmap+0x138/0x3a0 [ 39.234852] __x64_sys_munmap+0x59/0x80 [ 39.235363] do_syscall_64+0x3f/0x90 [ 39.235844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.236488] [ 39.236704] The buggy address belongs to the object at ffff88800dfe0bc8 [ 39.236704] which belongs to the cache vm_area_struct of size 168 [ 39.238191] The buggy address is located 88 bytes inside of [ 39.238191] freed 168-byte region [ffff88800dfe0bc8, ffff88800dfe0c70) [ 39.239624] [ 39.239842] The buggy address belongs to the physical page: [ 39.240533] page:00000000f86bbc18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfe0 [ 39.241608] memcg:ffff88800e4e8201 [ 39.242041] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.242748] page_type: 0xffffffff() [ 39.243198] raw: 0100000000000200 ffff8880087a0c80 ffffea000034e700 dead000000000003 [ 39.244133] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e4e8201 [ 39.245048] page dumped because: kasan: bad access detected [ 39.245724] [ 39.245944] Memory state around the buggy address: [ 39.246530] ffff88800dfe0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.247403] ffff88800dfe0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 39.248260] >ffff88800dfe0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.249118] ^ [ 39.249653] ffff88800dfe0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.250515] ffff88800dfe0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.251390] ================================================================== [ 39.252458] Disabling lock debugging due to kernel taint [ 41.246063] BUG: Bad rss-counter state mm:00000000394d13de type:MM_FILEPAGES val:33 [ 41.247307] BUG: Bad rss-counter state mm:00000000394d13de type:MM_ANONPAGES val:22 [ 41.647838] BUG: Bad rss-counter state mm:00000000a6b2f141 type:MM_FILEPAGES val:33 [ 41.648834] BUG: Bad rss-counter state mm:00000000a6b2f141 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36458' (ECDSA) to the list of known hosts. 2023/06/20 15:21:45 fuzzer started 2023/06/20 15:21:45 dialing manager at localhost:36067 2023/06/20 15:21:45 checking machine... 2023/06/20 15:21:45 checking revisions... [ 42.422688] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:21:45 testing simple program... [ 42.470693] cgroup: Unknown subsys name 'net' [ 42.524701] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:21:45 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000001 RCX=0000000080000000 RDX=ffff8880178b0000 RSI=ffffffff811431f6 RDI=0000000000000006 RBP=000000000c5b9b80 RSP=ffff888017b1fda8 R8 =0000000000000006 R9 =0000000000000001 R10=0000000000080000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000800 R14=1ffff11002f63fc5 R15=dffffc0000000000 RIP=ffffffff814c0871 RFL=00000256 [---ZAP-] 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 00007f27a8930900 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=00007ffc4da4a000 CR3=000000000e728000 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=ffff888016bc0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016bbf901 RSI=ffff888016bbf970 RDI=ffff888016bbf6b0 RBP=ffff888016bbf6f8 RSP=ffff888016bbf618 R8 =0000000000000001 R9 =ffff888016bbf6e0 R10=0000000000038001 R11=0000000000020c51 R12=ffff888016bbf700 R13=ffff888016bb8000 R14=ffff888016bbf970 R15=ffff888016bbf6a0 RIP=ffffffff811304d1 RFL=00000296 [--S-AP-] 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 00007f8a7af97900 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=00007f5df369c650 CR3=000000000cb1e000 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=2034343a31323a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a31323a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000