syzkaller login: [ 28.829769] BUG: Bad rss-counter state mm:000000009884ba42 type:MM_FILEPAGES val:33 [ 28.831050] BUG: Bad rss-counter state mm:000000009884ba42 type:MM_ANONPAGES val:22 [ 28.900063] ================================================================== [ 28.900975] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.901921] Read of size 8 at addr ffff8880098f7d08 by task sshd/219 [ 28.902713] [ 28.903076] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.903935] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.904919] Call Trace: [ 28.905253] [ 28.905542] dump_stack_lvl+0x91/0xf0 [ 28.906053] print_report+0xcc/0x620 [ 28.906551] ? __virt_addr_valid+0x102/0x340 [ 28.907108] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.907726] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.908353] kasan_report+0xbe/0xf0 [ 28.908839] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.909465] vma_interval_tree_remove+0xc75/0xec0 [ 28.910089] vma_prepare+0xc54/0x11a0 [ 28.910573] __split_vma+0x5af/0x950 [ 28.911047] ? __pfx___split_vma+0x10/0x10 [ 28.911577] ? find_held_lock+0x2c/0x110 [ 28.912098] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.912660] ? lock_is_held_type+0x9f/0x120 [ 28.913201] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.913805] ? mtree_range_walk+0x632/0x900 [ 28.914366] ? mas_walk+0x5c7/0x7c0 [ 28.914842] do_vmi_munmap+0x1f1/0x2b0 [ 28.915342] mmap_region+0x1f9/0x2660 [ 28.915825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.916345] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.917058] ? __pfx_lock_acquire+0x10/0x10 [ 28.917592] ? __pfx_mmap_region+0x10/0x10 [ 28.918139] ? security_mmap_addr+0x7d/0xa0 [ 28.918662] ? get_unmapped_area+0x1f5/0x3f0 [ 28.919214] do_mmap+0x854/0xf00 [ 28.919653] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.920148] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.920711] ksys_mmap_pgoff+0x3af/0x500 [ 28.921215] do_syscall_64+0x3f/0x90 [ 28.921697] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.922365] RIP: 0033:0x7f8cff569d82 [ 28.922837] 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 [ 28.924949] RSP: 002b:00007ffe27d5a4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.925856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8cff569d82 [ 28.926708] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8cfe9a3000 [ 28.927552] RBP: 00007f8cfe9a3000 R08: 0000000000000009 R09: 0000000000001000 [ 28.928404] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c06b4ed90 [ 28.929247] R13: 00007ffe27d5a4d0 R14: 00007ffe27d5a500 R15: 00007ffe27d5a860 [ 28.930114] [ 28.930409] [ 28.930628] Allocated by task 211: [ 28.931056] kasan_save_stack+0x22/0x50 [ 28.931558] kasan_set_track+0x25/0x30 [ 28.932063] __kasan_slab_alloc+0x59/0x70 [ 28.932594] kmem_cache_alloc+0x16b/0x370 [ 28.933117] vm_area_dup+0x20/0x160 [ 28.933571] __split_vma+0x170/0x950 [ 28.934064] split_vma+0xc6/0x110 [ 28.934510] mprotect_fixup+0x8d2/0xb30 [ 28.935019] do_mprotect_pkey+0x87e/0xd40 [ 28.935550] __x64_sys_mprotect+0x78/0xc0 [ 28.936073] do_syscall_64+0x3f/0x90 [ 28.936555] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.937211] [ 28.937429] Freed by task 211: [ 28.937820] kasan_save_stack+0x22/0x50 [ 28.938346] kasan_set_track+0x25/0x30 [ 28.938856] kasan_save_free_info+0x2b/0x50 [ 28.939395] __kasan_slab_free+0x10a/0x190 [ 28.939935] kmem_cache_free+0x10d/0x4d0 [ 28.940439] rcu_core+0x8c8/0x2860 [ 28.940890] __do_softirq+0x1b7/0x7d4 [ 28.941375] [ 28.941588] Last potentially related work creation: [ 28.942190] kasan_save_stack+0x22/0x50 [ 28.942696] __kasan_record_aux_stack+0x8e/0xa0 [ 28.943276] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.943917] remove_vma+0x139/0x170 [ 28.944423] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.944977] do_vmi_munmap+0x1f1/0x2b0 [ 28.945461] __vm_munmap+0x138/0x3a0 [ 28.945925] __x64_sys_munmap+0x59/0x80 [ 28.946440] do_syscall_64+0x3f/0x90 [ 28.946914] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.947557] [ 28.947774] Second to last potentially related work creation: [ 28.948452] kasan_save_stack+0x22/0x50 [ 28.948957] __kasan_record_aux_stack+0x8e/0xa0 [ 28.949526] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.950174] remove_vma+0x139/0x170 [ 28.950629] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.951190] do_vmi_munmap+0x1f1/0x2b0 [ 28.951680] mmap_region+0x1f9/0x2660 [ 28.952164] do_mmap+0x854/0xf00 [ 28.952600] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.953093] ksys_mmap_pgoff+0x3af/0x500 [ 28.953595] do_syscall_64+0x3f/0x90 [ 28.954080] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.954725] [ 28.954943] The buggy address belongs to the object at ffff8880098f7cb0 [ 28.954943] which belongs to the cache vm_area_struct of size 168 [ 28.956415] The buggy address is located 88 bytes inside of [ 28.956415] freed 168-byte region [ffff8880098f7cb0, ffff8880098f7d58) [ 28.957810] [ 28.958032] The buggy address belongs to the physical page: [ 28.958695] page:0000000070ba6683 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98f7 [ 28.959797] memcg:ffff88800ec73001 [ 28.960229] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.960932] page_type: 0xffffffff() [ 28.961392] raw: 0100000000000200 ffff8880087a0c80 ffffea00003f36c0 dead000000000003 [ 28.962340] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec73001 [ 28.963283] page dumped because: kasan: bad access detected [ 28.963950] [ 28.964168] Memory state around the buggy address: [ 28.964747] ffff8880098f7c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 28.965621] ffff8880098f7c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 28.966493] >ffff8880098f7d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 28.967376] ^ [ 28.967820] ffff8880098f7d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.968682] ffff8880098f7e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 28.969537] ================================================================== [ 28.970467] Disabling lock debugging due to kernel taint [ 31.085296] BUG: Bad rss-counter state mm:0000000012ee16d0 type:MM_FILEPAGES val:33 [ 31.086839] BUG: Bad rss-counter state mm:0000000012ee16d0 type:MM_ANONPAGES val:22 [ 31.594713] BUG: Bad rss-counter state mm:00000000541f35de type:MM_FILEPAGES val:33 [ 31.595971] BUG: Bad rss-counter state mm:00000000541f35de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3980' (ECDSA) to the list of known hosts. 2023/06/21 03:05:24 fuzzer started 2023/06/21 03:05:25 dialing manager at localhost:36067 2023/06/21 03:05:25 checking machine... 2023/06/21 03:05:25 checking revisions... [ 32.293197] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:05:25 testing simple program... [ 32.344204] cgroup: Unknown subsys name 'net' [ 32.387851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:05:24 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffa9a9e73ff RCX=ffffffff813a0add RDX=ffff88800dfd1b40 RSI=0000000000000100 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce09a20 R8 =0000000000000006 R9 =00007ffa9a9e73ff R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800dfd1b40 R15=ffff88801a90d8d0 RIP=ffffffff814c0860 RFL=00000246 [---Z-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 00007ffa9a563700 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=00007f553360b030 CR3=000000000fa12000 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=083e66b34179909b4a4bdee7ea7d5471 XMM02=ec2efd57dc4c00df000000000011f3c0 XMM03=20a69a9141702b6c000000000011f490 XMM04=2c623e373367be9b00000000000ae988 XMM05=dfcdbad4f1609c3700000000001337c0 XMM06=806171799158d9670000000000133648 XMM07=e042d86d42eb936e0000000000121ff0 XMM08=20a69a9141702b6c000000000011f490 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=1ffff11001fb9f71 RCX=ffffffff812d8f13 RDX=0000000000000001 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88800fdcfb78 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88806cf361a0 R15=0000000000000000 RIP=ffffffff812d8f20 RFL=00000047 [---Z-PC] 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 00007f8c2fe84900 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=00007ffeba7fd000 CR3=00000000102d8000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000