syzkaller login: [ 68.890751] BUG: Bad rss-counter state mm:000000002f623833 type:MM_FILEPAGES val:33 [ 68.891734] BUG: Bad rss-counter state mm:000000002f623833 type:MM_ANONPAGES val:22 [ 69.114141] ================================================================== [ 69.115061] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.116007] Read of size 8 at addr ffff88800ca66228 by task sshd/229 [ 69.116784] [ 69.117001] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 69.118010] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.119018] Call Trace: [ 69.119338] [ 69.119624] dump_stack_lvl+0x91/0xf0 [ 69.120120] print_report+0xcc/0x620 [ 69.120610] ? __virt_addr_valid+0x102/0x340 [ 69.121166] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.121794] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.122424] kasan_report+0xbe/0xf0 [ 69.122899] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.123523] vma_interval_tree_remove+0xc75/0xec0 [ 69.124145] vma_prepare+0xc54/0x11a0 [ 69.124634] __split_vma+0x5af/0x950 [ 69.125111] ? __pfx___split_vma+0x10/0x10 [ 69.125645] ? find_held_lock+0x2c/0x110 [ 69.126174] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.126751] ? lock_is_held_type+0x9f/0x120 [ 69.127298] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.127909] ? mtree_range_walk+0x632/0x900 [ 69.128462] ? mas_walk+0x5c7/0x7c0 [ 69.128941] do_vmi_munmap+0x1f1/0x2b0 [ 69.129449] mmap_region+0x1f9/0x2660 [ 69.129938] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.130479] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.131206] ? __pfx_lock_acquire+0x10/0x10 [ 69.131740] ? __pfx_mmap_region+0x10/0x10 [ 69.132279] ? security_mmap_addr+0x7d/0xa0 [ 69.132824] ? get_unmapped_area+0x1f5/0x3f0 [ 69.133376] do_mmap+0x854/0xf00 [ 69.133819] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.134344] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.134907] ksys_mmap_pgoff+0x3af/0x500 [ 69.135419] do_syscall_64+0x3f/0x90 [ 69.135904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.136558] RIP: 0033:0x7f4dc8316d82 [ 69.137024] 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 [ 69.139185] RSP: 002b:00007ffc26b311e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.140103] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4dc8316d82 [ 69.140960] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4dc7750000 [ 69.141806] RBP: 00007f4dc7750000 R08: 0000000000000009 R09: 0000000000001000 [ 69.142665] R10: 0000000000000812 R11: 0000000000000206 R12: 000056373dd98ec0 [ 69.143522] R13: 00007ffc26b31200 R14: 00007ffc26b31230 R15: 00007ffc26b31590 [ 69.144383] [ 69.144673] [ 69.144896] Allocated by task 219: [ 69.145327] kasan_save_stack+0x22/0x50 [ 69.145829] kasan_set_track+0x25/0x30 [ 69.146339] __kasan_slab_alloc+0x59/0x70 [ 69.146869] kmem_cache_alloc+0x16b/0x370 [ 69.147391] vm_area_dup+0x20/0x160 [ 69.147847] __split_vma+0x170/0x950 [ 69.148317] split_vma+0xc6/0x110 [ 69.148758] mprotect_fixup+0x8d2/0xb30 [ 69.149271] do_mprotect_pkey+0x87e/0xd40 [ 69.149807] __x64_sys_mprotect+0x78/0xc0 [ 69.150345] do_syscall_64+0x3f/0x90 [ 69.150815] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.151475] [ 69.151690] Freed by task 219: [ 69.152085] kasan_save_stack+0x22/0x50 [ 69.152598] kasan_set_track+0x25/0x30 [ 69.153102] kasan_save_free_info+0x2b/0x50 [ 69.153642] __kasan_slab_free+0x10a/0x190 [ 69.154177] kmem_cache_free+0x10d/0x4d0 [ 69.154719] rcu_core+0x8c8/0x2860 [ 69.155161] __do_softirq+0x1b7/0x7d4 [ 69.155638] [ 69.155853] Last potentially related work creation: [ 69.156440] kasan_save_stack+0x22/0x50 [ 69.156951] __kasan_record_aux_stack+0x8e/0xa0 [ 69.157539] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.158183] remove_vma+0x139/0x170 [ 69.158641] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.159205] do_vmi_munmap+0x1f1/0x2b0 [ 69.159699] __vm_munmap+0x138/0x3a0 [ 69.160176] __x64_sys_munmap+0x59/0x80 [ 69.160690] do_syscall_64+0x3f/0x90 [ 69.161168] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.161819] [ 69.162037] The buggy address belongs to the object at ffff88800ca661d0 [ 69.162037] which belongs to the cache vm_area_struct of size 168 [ 69.163515] The buggy address is located 88 bytes inside of [ 69.163515] freed 168-byte region [ffff88800ca661d0, ffff88800ca66278) [ 69.164933] [ 69.165158] The buggy address belongs to the physical page: [ 69.165818] page:00000000ee435a40 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca66 [ 69.166927] memcg:ffff88800fe84f01 [ 69.167358] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.168007] page_type: 0xffffffff() [ 69.168456] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 69.169380] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fe84f01 [ 69.170295] page dumped because: kasan: bad access detected [ 69.170960] [ 69.171182] Memory state around the buggy address: [ 69.171762] ffff88800ca66100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 69.172623] ffff88800ca66180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 69.173488] >ffff88800ca66200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 69.174351] ^ [ 69.174911] ffff88800ca66280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 69.175772] ffff88800ca66300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 69.176623] ================================================================== [ 69.177616] Disabling lock debugging due to kernel taint [ 71.126275] BUG: Bad rss-counter state mm:0000000017b51d56 type:MM_FILEPAGES val:33 [ 71.127460] BUG: Bad rss-counter state mm:0000000017b51d56 type:MM_ANONPAGES val:22 [ 71.604620] BUG: Bad rss-counter state mm:000000005a69c91a type:MM_FILEPAGES val:33 [ 71.605822] BUG: Bad rss-counter state mm:000000005a69c91a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25045' (ECDSA) to the list of known hosts. 2023/06/20 06:27:07 fuzzer started 2023/06/20 06:27:07 dialing manager at localhost:44161 2023/06/20 06:27:07 checking machine... 2023/06/20 06:27:07 checking revisions... [ 72.264403] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:27:08 testing simple program... [ 72.309577] cgroup: Unknown subsys name 'net' [ 72.346673] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:27:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11002e39f12 RCX=0000000000000000 RDX=ffff888017099b40 RSI=ffffffff81b3dc39 RDI=0000000000000004 RBP=ffff888019ba3e20 RSP=ffff8880171cf860 R8 =0000000000000004 R9 =0000000000000020 R10=0000000000000020 R11=00000000000b6996 R12=ffff88801ae8a268 R13=ffff8880171cf8d0 R14=0000000000000020 R15=0000000000000020 RIP=ffffffff81b3dc39 RFL=00000293 [--S-A-C] 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 00007f43e2b0b700 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=00007f947bd14b10 CR3=0000000018f0e000 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=2037303a37323a3630203032206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a37323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000002 RBX=ffff88806cf39500 RCX=0000000000000000 RDX=ffff888008d71b40 RSI=ffffffff813ae2a2 RDI=0000000000000005 RBP=00000000fffc85e6 RSP=ffff888008d879a0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000002 R11=0000000000000000 R12=0000000000000000 R13=00000000fffc85e6 R14=ffff888008c58400 R15=dffffc0000000000 RIP=ffffffff8126f832 RFL=00000093 [--S-A-C] 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=00007ffcd7b47000 CR3=0000000018f0e000 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=2037303a37323a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037303a37323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000