syzkaller login: [ 71.515800] BUG: Bad rss-counter state mm:00000000795603df type:MM_FILEPAGES val:33 [ 71.516710] BUG: Bad rss-counter state mm:00000000795603df type:MM_ANONPAGES val:22 [ 71.624107] ================================================================== [ 71.624931] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 71.625785] Read of size 8 at addr ffff88800e272df0 by task sshd/227 [ 71.626482] [ 71.626672] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 71.627454] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 71.628504] Call Trace: [ 71.628789] [ 71.629043] dump_stack_lvl+0x91/0xf0 [ 71.629480] print_report+0xcc/0x620 [ 71.629908] ? __virt_addr_valid+0x102/0x340 [ 71.630555] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.631302] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.632026] kasan_report+0xbe/0xf0 [ 71.632610] ? vma_interval_tree_remove+0xc75/0xec0 [ 71.633363] vma_interval_tree_remove+0xc75/0xec0 [ 71.634149] vma_prepare+0xc54/0x11a0 [ 71.634776] __split_vma+0x5af/0x950 [ 71.635382] ? __pfx___split_vma+0x10/0x10 [ 71.636076] ? find_held_lock+0x2c/0x110 [ 71.636836] do_vmi_align_munmap+0x2ba/0x11f0 [ 71.637664] ? lock_is_held_type+0x9f/0x120 [ 71.638461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 71.639371] ? mtree_range_walk+0x632/0x900 [ 71.640215] ? mas_walk+0x5c7/0x7c0 [ 71.640961] do_vmi_munmap+0x1f1/0x2b0 [ 71.641647] mmap_region+0x1f9/0x2660 [ 71.642310] ? vm_mmap_pgoff+0x15c/0x3a0 [ 71.642991] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 71.643967] ? __pfx_lock_acquire+0x10/0x10 [ 71.644707] ? __pfx_mmap_region+0x10/0x10 [ 71.645428] ? security_mmap_addr+0x7d/0xa0 [ 71.646140] ? get_unmapped_area+0x1f5/0x3f0 [ 71.646887] do_mmap+0x854/0xf00 [ 71.647473] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.648138] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 71.648905] ksys_mmap_pgoff+0x3af/0x500 [ 71.649595] do_syscall_64+0x3f/0x90 [ 71.650235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.651115] RIP: 0033:0x7fd49d14dd82 [ 71.651728] 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 [ 71.654634] RSP: 002b:00007ffd47883748 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 71.655865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd49d14dd82 [ 71.657053] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd49c587000 [ 71.658203] RBP: 00007fd49c587000 R08: 0000000000000009 R09: 0000000000001000 [ 71.659365] R10: 0000000000000812 R11: 0000000000000206 R12: 00005640a9bf5ec0 [ 71.660529] R13: 00007ffd47883760 R14: 00007ffd47883790 R15: 00007ffd47883af0 [ 71.661700] [ 71.662097] [ 71.662385] Allocated by task 220: [ 71.662967] kasan_save_stack+0x22/0x50 [ 71.663651] kasan_set_track+0x25/0x30 [ 71.664319] __kasan_slab_alloc+0x59/0x70 [ 71.665059] kmem_cache_alloc+0x16b/0x370 [ 71.665765] vm_area_dup+0x20/0x160 [ 71.666376] __split_vma+0x170/0x950 [ 71.667001] split_vma+0xc6/0x110 [ 71.667595] mprotect_fixup+0x8d2/0xb30 [ 71.668261] do_mprotect_pkey+0x87e/0xd40 [ 71.668983] __x64_sys_mprotect+0x78/0xc0 [ 71.669698] do_syscall_64+0x3f/0x90 [ 71.670335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.671192] [ 71.671475] Freed by task 19: [ 71.671997] kasan_save_stack+0x22/0x50 [ 71.672697] kasan_set_track+0x25/0x30 [ 71.673366] kasan_save_free_info+0x2b/0x50 [ 71.674076] __kasan_slab_free+0x10a/0x190 [ 71.674803] kmem_cache_free+0x10d/0x4d0 [ 71.675496] rcu_core+0x8c8/0x2860 [ 71.676092] __do_softirq+0x1b7/0x7d4 [ 71.676750] [ 71.677036] Last potentially related work creation: [ 71.677840] kasan_save_stack+0x22/0x50 [ 71.678519] __kasan_record_aux_stack+0x8e/0xa0 [ 71.679298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.680179] remove_vma+0x139/0x170 [ 71.680811] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.681574] do_vmi_munmap+0x1f1/0x2b0 [ 71.682225] __vm_munmap+0x138/0x3a0 [ 71.682859] __x64_sys_munmap+0x59/0x80 [ 71.683544] do_syscall_64+0x3f/0x90 [ 71.684185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.685073] [ 71.685355] Second to last potentially related work creation: [ 71.686291] kasan_save_stack+0x22/0x50 [ 71.686968] __kasan_record_aux_stack+0x8e/0xa0 [ 71.687735] __call_rcu_common.constprop.0+0x6a/0xb90 [ 71.688576] remove_vma+0x139/0x170 [ 71.689101] do_vmi_align_munmap+0xd4a/0x11f0 [ 71.689720] do_vmi_munmap+0x1f1/0x2b0 [ 71.690268] mmap_region+0x1f9/0x2660 [ 71.690816] do_mmap+0x854/0xf00 [ 71.691296] vm_mmap_pgoff+0x1a6/0x3a0 [ 71.691839] ksys_mmap_pgoff+0x3af/0x500 [ 71.692423] do_syscall_64+0x3f/0x90 [ 71.692958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 71.693668] [ 71.693923] The buggy address belongs to the object at ffff88800e272d98 [ 71.693923] which belongs to the cache vm_area_struct of size 168 [ 71.695546] The buggy address is located 88 bytes inside of [ 71.695546] freed 168-byte region [ffff88800e272d98, ffff88800e272e40) [ 71.697126] [ 71.697364] The buggy address belongs to the physical page: [ 71.698090] page:000000004227cea2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe272 [ 71.699318] memcg:ffff88800c5d0e01 [ 71.699802] flags: 0x100000000000200(slab|node=0|zone=1) [ 71.700552] page_type: 0xffffffff() [ 71.701062] raw: 0100000000000200 ffff88800879fc80 ffffea000037c3c0 dead000000000006 [ 71.702114] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5d0e01 [ 71.703153] page dumped because: kasan: bad access detected [ 71.703906] [ 71.704153] Memory state around the buggy address: [ 71.704835] ffff88800e272c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 71.705807] ffff88800e272d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 71.706790] >ffff88800e272d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 71.707765] ^ [ 71.708692] ffff88800e272e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 71.709673] ffff88800e272e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 71.710641] ================================================================== [ 71.711730] Disabling lock debugging due to kernel taint [ 73.716168] BUG: Bad rss-counter state mm:000000004d8e57e5 type:MM_FILEPAGES val:33 [ 73.717928] BUG: Bad rss-counter state mm:000000004d8e57e5 type:MM_ANONPAGES val:22 [ 74.200654] BUG: Bad rss-counter state mm:0000000035ab0b04 type:MM_FILEPAGES val:33 [ 74.202126] BUG: Bad rss-counter state mm:0000000035ab0b04 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47192' (ECDSA) to the list of known hosts. 2023/06/19 16:55:04 fuzzer started 2023/06/19 16:55:04 dialing manager at localhost:44161 2023/06/19 16:55:04 checking machine... 2023/06/19 16:55:04 checking revisions... [ 74.988624] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:55:04 testing simple program... [ 75.047422] cgroup: Unknown subsys name 'net' [ 75.095044] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:55:01 Registers: info registers vcpu 0 RAX=ffff88806ce0a001 RBX=ffff88806ce09a98 RCX=0000000000000002 RDX=ffff88806ce09e01 RSI=ffff88806ce09e28 RDI=ffff88806ce09aa8 RBP=ffff88806ce09e28 RSP=ffff88806ce099f0 R8 =ffffffff861375e4 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020dae R12=0000000000000008 R13=ffff88806ce02000 R14=ffff88806ce09e30 R15=ffff88806ce09a98 RIP=ffffffff8113048d RFL=00000283 [--S---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 00007fc89cb4b700 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=00007f7670a8e650 CR3=000000000eca6000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a36333537332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363335 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=0000000080000000 RBX=ffff88800e383400 RCX=0000000080000000 RDX=1ffff110028e607e RSI=ffffffff814d4599 RDI=ffff8880147303f0 RBP=000000007fff0000 RSP=ffff88801472fde0 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=000000007fff0000 R13=dffffc0000000000 R14=ffff88801472fe30 R15=ffffc90000646000 RIP=ffffffff814c07f1 RFL=00000282 [--S----] 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 00007f13b7a06900 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=0000563e6a220048 CR3=000000000edb2000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=27e50c662c7fb33800000000000ae988 XMM05=43ac5a24d55068360000000000136ef8 XMM06=e8008b1642ea3e600000000000135ce8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000