syzkaller login: [ 23.736251] BUG: Bad rss-counter state mm:00000000bed34aac type:MM_FILEPAGES val:33 [ 23.737491] BUG: Bad rss-counter state mm:00000000bed34aac type:MM_ANONPAGES val:22 [ 23.883490] ================================================================== [ 23.884378] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.885263] Read of size 8 at addr ffff88800d8c53f8 by task sshd/218 [ 23.885982] [ 23.886187] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.887155] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.888071] Call Trace: [ 23.888373] [ 23.888641] dump_stack_lvl+0x91/0xf0 [ 23.889105] print_report+0xcc/0x620 [ 23.889584] ? __virt_addr_valid+0x102/0x340 [ 23.890108] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.890702] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.891280] kasan_report+0xbe/0xf0 [ 23.891733] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.892322] vma_interval_tree_remove+0xc75/0xec0 [ 23.892892] vma_prepare+0xc54/0x11a0 [ 23.893345] __split_vma+0x5af/0x950 [ 23.893792] ? __pfx___split_vma+0x10/0x10 [ 23.894290] ? find_held_lock+0x2c/0x110 [ 23.894804] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.895338] ? lock_is_held_type+0x9f/0x120 [ 23.895868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.896478] ? mtree_range_walk+0x632/0x900 [ 23.897033] ? mas_walk+0x5c7/0x7c0 [ 23.897510] do_vmi_munmap+0x1f1/0x2b0 [ 23.898010] mmap_region+0x1f9/0x2660 [ 23.898516] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.899037] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.899750] ? __pfx_lock_acquire+0x10/0x10 [ 23.900279] ? __pfx_mmap_region+0x10/0x10 [ 23.900822] ? security_mmap_addr+0x7d/0xa0 [ 23.901354] ? get_unmapped_area+0x1f5/0x3f0 [ 23.901906] do_mmap+0x854/0xf00 [ 23.902352] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.902847] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.903412] ksys_mmap_pgoff+0x3af/0x500 [ 23.903927] do_syscall_64+0x3f/0x90 [ 23.904404] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.905049] RIP: 0033:0x7f68623d0d82 [ 23.905513] 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 [ 23.907631] RSP: 002b:00007ffef94d7b08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.908530] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68623d0d82 [ 23.909377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f686180a000 [ 23.910229] RBP: 00007f686180a000 R08: 0000000000000009 R09: 0000000000001000 [ 23.911093] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a457ea2ec0 [ 23.911935] R13: 00007ffef94d7b20 R14: 00007ffef94d7b50 R15: 00007ffef94d7eb0 [ 23.912801] [ 23.913090] [ 23.913299] Allocated by task 211: [ 23.913727] kasan_save_stack+0x22/0x50 [ 23.914229] kasan_set_track+0x25/0x30 [ 23.914734] __kasan_slab_alloc+0x59/0x70 [ 23.915264] kmem_cache_alloc+0x16b/0x370 [ 23.915782] vm_area_dup+0x20/0x160 [ 23.916240] __split_vma+0x170/0x950 [ 23.916714] split_vma+0xc6/0x110 [ 23.917152] mprotect_fixup+0x8d2/0xb30 [ 23.917645] do_mprotect_pkey+0x87e/0xd40 [ 23.918166] __x64_sys_mprotect+0x78/0xc0 [ 23.918708] do_syscall_64+0x3f/0x90 [ 23.919194] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.919835] [ 23.920055] Freed by task 211: [ 23.920442] kasan_save_stack+0x22/0x50 [ 23.920952] kasan_set_track+0x25/0x30 [ 23.921443] kasan_save_free_info+0x2b/0x50 [ 23.921977] __kasan_slab_free+0x10a/0x190 [ 23.922514] kmem_cache_free+0x10d/0x4d0 [ 23.923020] rcu_core+0x8c8/0x2860 [ 23.923463] __do_softirq+0x1b7/0x7d4 [ 23.923952] [ 23.924166] Last potentially related work creation: [ 23.924752] kasan_save_stack+0x22/0x50 [ 23.925262] __kasan_record_aux_stack+0x8e/0xa0 [ 23.925841] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.926494] remove_vma+0x139/0x170 [ 23.926935] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.927486] do_vmi_munmap+0x1f1/0x2b0 [ 23.927968] __vm_munmap+0x138/0x3a0 [ 23.928480] __x64_sys_munmap+0x59/0x80 [ 23.928978] do_syscall_64+0x3f/0x90 [ 23.929444] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.930084] [ 23.930300] The buggy address belongs to the object at ffff88800d8c53a0 [ 23.930300] which belongs to the cache vm_area_struct of size 168 [ 23.931776] The buggy address is located 88 bytes inside of [ 23.931776] freed 168-byte region [ffff88800d8c53a0, ffff88800d8c5448) [ 23.933199] [ 23.933411] The buggy address belongs to the physical page: [ 23.934069] page:00000000d27a3f9e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd8c5 [ 23.935162] memcg:ffff88800e55d801 [ 23.935585] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 23.936299] page_type: 0xffffffff() [ 23.936751] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b2c80 dead000000000007 [ 23.937672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e55d801 [ 23.938600] page dumped because: kasan: bad access detected [ 23.939269] [ 23.939479] Memory state around the buggy address: [ 23.940063] ffff88800d8c5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.940920] ffff88800d8c5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.941775] >ffff88800d8c5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 23.942654] ^ [ 23.943509] ffff88800d8c5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 23.944365] ffff88800d8c5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.945223] ================================================================== [ 23.946262] Disabling lock debugging due to kernel taint [ 26.240714] BUG: Bad rss-counter state mm:000000001ecf0ff4 type:MM_FILEPAGES val:33 [ 26.241942] BUG: Bad rss-counter state mm:000000001ecf0ff4 type:MM_ANONPAGES val:22 [ 26.786072] BUG: Bad rss-counter state mm:000000007b93d1d1 type:MM_FILEPAGES val:33 [ 26.787073] BUG: Bad rss-counter state mm:000000007b93d1d1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65436' (ECDSA) to the list of known hosts. 2023/06/20 20:17:21 fuzzer started 2023/06/20 20:17:21 dialing manager at localhost:36067 2023/06/20 20:17:21 checking machine... 2023/06/20 20:17:21 checking revisions... [ 27.457026] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:17:21 testing simple program... [ 27.505249] cgroup: Unknown subsys name 'net' [ 27.542394] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:17:21 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85e6526c RCX=ffffffff81f54a32 RDX=0000000000000008 RSI=ffffffff861d39c2 RDI=ffffffff85e65240 RBP=ffffffff85e65260 RSP=ffff88800f12f230 R8 =ffffffff861d39c2 R9 =ffff88800f12f328 R10=0000000000038001 R11=000000000003aa1f R12=ffffffff85e65268 R13=ffffffff85e65240 R14=ffffffff85e6525c R15=dffffc0000000000 RIP=ffffffff8112fc64 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 00007efdae77d700 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=00007f5bf65df618 CR3=000000000ddae000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3732325b646873732030323a3731 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363439 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9e135e RSI=ffffffff8180f5bb RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a88 R8 =ffffffff86138eb4 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d9c R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88801aa6eec0 RIP=ffffffff813ad47f 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 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=00007f146bf3f920 CR3=0000000008c5e000 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=5377beb2fc0aae83dc48b40ebf44cbe5 XMM02=2c67c8bc2e329bc3000000000011fb70 XMM03=fb795ef6d657705600000000001221e0 XMM04=36ec657415b8775c00000000000ae988 XMM05=751b9502027dc0b90000000000132078 XMM06=ed180656e085df7c0000000000131250 XMM07=e042d86d42eb936e0000000000122460 XMM08=593eee562c281225000000000011fbd0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000