syzkaller login: [ 31.976986] BUG: Bad rss-counter state mm:000000001461bab6 type:MM_FILEPAGES val:33 [ 31.978304] BUG: Bad rss-counter state mm:000000001461bab6 type:MM_ANONPAGES val:22 [ 32.150009] ================================================================== [ 32.150947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.151905] Read of size 8 at addr ffff88800de26058 by task sshd/220 [ 32.152806] [ 32.153037] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.153906] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.154931] Call Trace: [ 32.155254] [ 32.155541] dump_stack_lvl+0x91/0xf0 [ 32.156049] print_report+0xcc/0x620 [ 32.156553] ? __virt_addr_valid+0x102/0x340 [ 32.157112] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.157753] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.158373] kasan_report+0xbe/0xf0 [ 32.158866] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.159496] vma_interval_tree_remove+0xc75/0xec0 [ 32.160111] vma_prepare+0xc54/0x11a0 [ 32.160593] __split_vma+0x5af/0x950 [ 32.161071] ? __pfx___split_vma+0x10/0x10 [ 32.161599] ? find_held_lock+0x2c/0x110 [ 32.162126] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.162696] ? lock_is_held_type+0x9f/0x120 [ 32.163234] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.163837] ? mtree_range_walk+0x632/0x900 [ 32.164409] ? mas_walk+0x5c7/0x7c0 [ 32.164884] do_vmi_munmap+0x1f1/0x2b0 [ 32.165372] mmap_region+0x1f9/0x2660 [ 32.165851] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.166364] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.167083] ? __pfx_lock_acquire+0x10/0x10 [ 32.167624] ? __pfx_mmap_region+0x10/0x10 [ 32.168171] ? security_mmap_addr+0x7d/0xa0 [ 32.168716] ? get_unmapped_area+0x1f5/0x3f0 [ 32.169273] do_mmap+0x854/0xf00 [ 32.169713] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.170215] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.170791] ksys_mmap_pgoff+0x3af/0x500 [ 32.171306] do_syscall_64+0x3f/0x90 [ 32.171785] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.172452] RIP: 0033:0x7f4c33323d82 [ 32.172913] 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 [ 32.175143] RSP: 002b:00007ffcca9d9ab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.176209] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4c33323d82 [ 32.177204] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4c3275d000 [ 32.178217] RBP: 00007f4c3275d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.179212] R10: 0000000000000812 R11: 0000000000000206 R12: 000056186a9aaec0 [ 32.180229] R13: 00007ffcca9d9ad0 R14: 00007ffcca9d9b00 R15: 00007ffcca9d9e60 [ 32.181249] [ 32.181597] [ 32.181847] Allocated by task 213: [ 32.182351] kasan_save_stack+0x22/0x50 [ 32.182952] kasan_set_track+0x25/0x30 [ 32.183535] __kasan_slab_alloc+0x59/0x70 [ 32.184177] kmem_cache_alloc+0x16b/0x370 [ 32.184789] vm_area_dup+0x20/0x160 [ 32.185328] __split_vma+0x170/0x950 [ 32.185880] split_vma+0xc6/0x110 [ 32.186400] mprotect_fixup+0x8d2/0xb30 [ 32.186992] do_mprotect_pkey+0x87e/0xd40 [ 32.187598] __x64_sys_mprotect+0x78/0xc0 [ 32.188213] do_syscall_64+0x3f/0x90 [ 32.188769] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.189519] [ 32.189772] Freed by task 213: [ 32.190227] kasan_save_stack+0x22/0x50 [ 32.190811] kasan_set_track+0x25/0x30 [ 32.191391] kasan_save_free_info+0x2b/0x50 [ 32.192026] __kasan_slab_free+0x10a/0x190 [ 32.192650] kmem_cache_free+0x10d/0x4d0 [ 32.193246] rcu_core+0x8c8/0x2860 [ 32.193812] __do_softirq+0x1b7/0x7d4 [ 32.194371] [ 32.194621] Last potentially related work creation: [ 32.195302] kasan_save_stack+0x22/0x50 [ 32.195898] __kasan_record_aux_stack+0x8e/0xa0 [ 32.196581] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.197331] remove_vma+0x139/0x170 [ 32.197856] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.198509] do_vmi_munmap+0x1f1/0x2b0 [ 32.199078] __vm_munmap+0x138/0x3a0 [ 32.199621] __x64_sys_munmap+0x59/0x80 [ 32.200203] do_syscall_64+0x3f/0x90 [ 32.200752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.201490] [ 32.201736] The buggy address belongs to the object at ffff88800de26000 [ 32.201736] which belongs to the cache vm_area_struct of size 168 [ 32.203425] The buggy address is located 88 bytes inside of [ 32.203425] freed 168-byte region [ffff88800de26000, ffff88800de260a8) [ 32.205058] [ 32.205307] The buggy address belongs to the physical page: [ 32.206070] page:00000000ac3a5198 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde26 [ 32.207323] memcg:ffff88800d4d9601 [ 32.207807] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.208553] page_type: 0xffffffff() [ 32.209078] raw: 0100000000000200 ffff88800879fc80 ffffea00003607c0 dead000000000002 [ 32.210134] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4d9601 [ 32.211176] page dumped because: kasan: bad access detected [ 32.211937] [ 32.212202] Memory state around the buggy address: [ 32.212869] ffff88800de25f00: fa fb fb fb fc fc fc fc 00 00 01 fc fc fc fc fc [ 32.213848] ffff88800de25f80: 00 00 01 fc fc fc fc fc 00 00 01 fc fc fc fc fc [ 32.214824] >ffff88800de26000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.215798] ^ [ 32.216642] ffff88800de26080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.217627] ffff88800de26100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.218599] ================================================================== [ 32.219860] Disabling lock debugging due to kernel taint [ 34.880958] BUG: Bad rss-counter state mm:00000000cfd833b3 type:MM_FILEPAGES val:33 [ 34.882196] BUG: Bad rss-counter state mm:00000000cfd833b3 type:MM_ANONPAGES val:22 [ 35.384353] BUG: Bad rss-counter state mm:000000008809c343 type:MM_FILEPAGES val:33 [ 35.385571] BUG: Bad rss-counter state mm:000000008809c343 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36959' (ECDSA) to the list of known hosts. 2023/06/20 10:25:08 fuzzer started 2023/06/20 10:25:08 dialing manager at localhost:44161 2023/06/20 10:25:08 checking machine... 2023/06/20 10:25:08 checking revisions... [ 36.080997] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:25:08 testing simple program... [ 36.128952] cgroup: Unknown subsys name 'net' [ 36.200686] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:25:07 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff818471d6 RDX=0000000000000000 RSI=0000000000000004 RDI=ffff888019396420 RBP=0000000000000010 RSP=ffff8880147e79c8 R8 =0000000000000001 R9 =ffffed1003272c84 R10=ffff888019396423 R11=00000000000b6996 R12=ffff88800e877380 R13=0000000000000000 R14=ffff8880193963d8 R15=ffff888019396390 RIP=ffffffff818471ef RFL=00000216 [----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 00007f8132008900 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=00007f813148ed30 CR3=00000000094d0000 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=b32b3cd62066d69800000000000ae988 XMM05=0037ae0a15f3aab90000000000135190 XMM06=19e9129bd510f2350000000000134418 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c24f90 RBX=0000000000000001 RCX=ffffffff86127c80 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff86127c82 RBP=ffff88801642eff0 RSP=ffff88801642ef28 R8 =ffffffff86127c84 R9 =ffff88801642efd8 R10=0000000000038001 R11=000000000001e41e R12=ffff88801642eff8 R13=ffff88801642efe0 R14=ffff88801642fdd0 R15=ffff88801642ef98 RIP=ffffffff811311c7 RFL=00000216 [----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 00007f34cf3b0900 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=00007f34cf375008 CR3=000000000dec4000 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