syzkaller login: [ 30.802275] BUG: Bad rss-counter state mm:00000000e3c37c7e type:MM_FILEPAGES val:33 [ 30.803412] BUG: Bad rss-counter state mm:00000000e3c37c7e type:MM_ANONPAGES val:22 [ 30.917146] ================================================================== [ 30.918235] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.919364] Read of size 8 at addr ffff88801a0c5ed8 by task sshd/222 [ 30.920402] [ 30.920666] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.921719] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.922921] Call Trace: [ 30.923308] [ 30.923673] dump_stack_lvl+0x91/0xf0 [ 30.924266] print_report+0xcc/0x620 [ 30.924848] ? __virt_addr_valid+0x102/0x340 [ 30.925509] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.926201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.926811] kasan_report+0xbe/0xf0 [ 30.927292] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.927914] vma_interval_tree_remove+0xc75/0xec0 [ 30.928484] vma_prepare+0xc54/0x11a0 [ 30.928936] __split_vma+0x5af/0x950 [ 30.929383] ? __pfx___split_vma+0x10/0x10 [ 30.929885] ? find_held_lock+0x2c/0x110 [ 30.930385] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.930918] ? lock_is_held_type+0x9f/0x120 [ 30.931430] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.932010] ? mtree_range_walk+0x632/0x900 [ 30.932534] ? mas_walk+0x5c7/0x7c0 [ 30.932994] do_vmi_munmap+0x1f1/0x2b0 [ 30.933459] mmap_region+0x1f9/0x2660 [ 30.933925] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.934408] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.935085] ? __pfx_lock_acquire+0x10/0x10 [ 30.935617] ? __pfx_mmap_region+0x10/0x10 [ 30.936132] ? security_mmap_addr+0x7d/0xa0 [ 30.936659] ? get_unmapped_area+0x1f5/0x3f0 [ 30.937197] do_mmap+0x854/0xf00 [ 30.937640] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.938132] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.938695] ksys_mmap_pgoff+0x3af/0x500 [ 30.939205] do_syscall_64+0x3f/0x90 [ 30.939687] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.940329] RIP: 0033:0x7f6c1b05bd82 [ 30.940788] 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 [ 30.942902] RSP: 002b:00007fffb6113968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.943813] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c1b05bd82 [ 30.944656] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c1a495000 [ 30.945499] RBP: 00007f6c1a495000 R08: 0000000000000009 R09: 0000000000001000 [ 30.946332] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625fe9c8ec0 [ 30.947177] R13: 00007fffb6113980 R14: 00007fffb61139b0 R15: 00007fffb6113d10 [ 30.948044] [ 30.948327] [ 30.948541] Allocated by task 215: [ 30.948968] kasan_save_stack+0x22/0x50 [ 30.949460] kasan_set_track+0x25/0x30 [ 30.949955] __kasan_slab_alloc+0x59/0x70 [ 30.950473] kmem_cache_alloc+0x16b/0x370 [ 30.950982] vm_area_dup+0x20/0x160 [ 30.951432] __split_vma+0x170/0x950 [ 30.951902] split_vma+0xc6/0x110 [ 30.952340] mprotect_fixup+0x8d2/0xb30 [ 30.952832] do_mprotect_pkey+0x87e/0xd40 [ 30.953346] __x64_sys_mprotect+0x78/0xc0 [ 30.953864] do_syscall_64+0x3f/0x90 [ 30.954332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.954969] [ 30.955184] Freed by task 215: [ 30.955576] kasan_save_stack+0x22/0x50 [ 30.956080] kasan_set_track+0x25/0x30 [ 30.956575] kasan_save_free_info+0x2b/0x50 [ 30.957103] __kasan_slab_free+0x10a/0x190 [ 30.957620] kmem_cache_free+0x10d/0x4d0 [ 30.958120] rcu_core+0x8c8/0x2860 [ 30.958559] __do_softirq+0x1b7/0x7d4 [ 30.959040] [ 30.959255] Last potentially related work creation: [ 30.959849] kasan_save_stack+0x22/0x50 [ 30.960347] __kasan_record_aux_stack+0x8e/0xa0 [ 30.960917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.961557] remove_vma+0x139/0x170 [ 30.961999] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.962544] do_vmi_munmap+0x1f1/0x2b0 [ 30.963022] __vm_munmap+0x138/0x3a0 [ 30.963481] __x64_sys_munmap+0x59/0x80 [ 30.963978] do_syscall_64+0x3f/0x90 [ 30.964453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.965079] [ 30.965299] The buggy address belongs to the object at ffff88801a0c5e80 [ 30.965299] which belongs to the cache vm_area_struct of size 168 [ 30.966762] The buggy address is located 88 bytes inside of [ 30.966762] freed 168-byte region [ffff88801a0c5e80, ffff88801a0c5f28) [ 30.968175] [ 30.968385] The buggy address belongs to the physical page: [ 30.969035] page:000000006bcd0a69 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0c5 [ 30.970134] memcg:ffff88800fee4c01 [ 30.970566] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.971203] page_type: 0xffffffff() [ 30.971661] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.972579] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fee4c01 [ 30.973487] page dumped because: kasan: bad access detected [ 30.974139] [ 30.974355] Memory state around the buggy address: [ 30.974933] ffff88801a0c5d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.975788] ffff88801a0c5e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.976629] >ffff88801a0c5e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.977480] ^ [ 30.978206] ffff88801a0c5f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.979054] ffff88801a0c5f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.979923] ================================================================== [ 30.980891] Disabling lock debugging due to kernel taint [ 33.226693] BUG: Bad rss-counter state mm:000000007a48b5f4 type:MM_FILEPAGES val:33 [ 33.227901] BUG: Bad rss-counter state mm:000000007a48b5f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19891' (ECDSA) to the list of known hosts. [ 33.771094] BUG: Bad rss-counter state mm:000000002e9cc6f4 type:MM_FILEPAGES val:33 [ 33.772137] BUG: Bad rss-counter state mm:000000002e9cc6f4 type:MM_ANONPAGES val:22 2023/06/21 04:13:45 fuzzer started 2023/06/21 04:13:45 dialing manager at localhost:36067 2023/06/21 04:13:45 checking machine... 2023/06/21 04:13:45 checking revisions... [ 34.396215] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:13:45 testing simple program... [ 34.444060] cgroup: Unknown subsys name 'net' [ 34.517571] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:13:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff818cf41b RDX=ffff88801469b680 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff8880160ae8d0 RSP=ffff888015c2fa58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000008 R11=00000000000b6a61 R12=ffff8880160ae960 R13=ffffffff818cf389 R14=0000000000000008 R15=ffff888015c2fdf0 RIP=ffffffff814c086b RFL=00000202 [-------] 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 00007f37e6804900 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=00007f17c7233650 CR3=000000000b99e000 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=0f76ad5200a4e7aa00000000000ae988 XMM05=0156b21184e5ff900000000000133140 XMM06=00c3ffa147b8d8570000000000131f30 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fff4c85f418 CR3=000000000d744000 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=2034343a33313a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034343a33313a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000