syzkaller login: [ 28.739334] BUG: Bad rss-counter state mm:0000000095b51b6d type:MM_FILEPAGES val:33 [ 28.740562] BUG: Bad rss-counter state mm:0000000095b51b6d type:MM_ANONPAGES val:22 [ 28.902813] ================================================================== [ 28.903722] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.904687] Read of size 8 at addr ffff88800ca63798 by task sshd/220 [ 28.905537] [ 28.905766] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.906632] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.907595] Call Trace: [ 28.907921] [ 28.908209] dump_stack_lvl+0x91/0xf0 [ 28.908733] print_report+0xcc/0x620 [ 28.909216] ? __virt_addr_valid+0x102/0x340 [ 28.909765] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.910381] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.911002] kasan_report+0xbe/0xf0 [ 28.911471] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.912081] vma_interval_tree_remove+0xc75/0xec0 [ 28.912682] vma_prepare+0xc54/0x11a0 [ 28.913165] __split_vma+0x5af/0x950 [ 28.913633] ? __pfx___split_vma+0x10/0x10 [ 28.914157] ? find_held_lock+0x2c/0x110 [ 28.914669] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.915223] ? lock_is_held_type+0x9f/0x120 [ 28.915763] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.916373] ? mtree_range_walk+0x632/0x900 [ 28.916940] ? mas_walk+0x5c7/0x7c0 [ 28.917420] do_vmi_munmap+0x1f1/0x2b0 [ 28.917904] mmap_region+0x1f9/0x2660 [ 28.918385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.918897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.919604] ? __pfx_lock_acquire+0x10/0x10 [ 28.920129] ? __pfx_mmap_region+0x10/0x10 [ 28.920842] ? security_mmap_addr+0x7d/0xa0 [ 28.921521] ? get_unmapped_area+0x1f5/0x3f0 [ 28.922204] do_mmap+0x854/0xf00 [ 28.922752] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.923372] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.924055] ksys_mmap_pgoff+0x3af/0x500 [ 28.924693] do_syscall_64+0x3f/0x90 [ 28.925285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.926084] RIP: 0033:0x7ff6b20a4d82 [ 28.926653] 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 [ 28.929282] RSP: 002b:00007ffce2b74648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.930199] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff6b20a4d82 [ 28.931048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff6b14de000 [ 28.931881] RBP: 00007ff6b14de000 R08: 0000000000000009 R09: 0000000000001000 [ 28.932732] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586c6898ec0 [ 28.933584] R13: 00007ffce2b74660 R14: 00007ffce2b74690 R15: 00007ffce2b749f0 [ 28.934431] [ 28.934721] [ 28.934936] Allocated by task 212: [ 28.935360] kasan_save_stack+0x22/0x50 [ 28.935866] kasan_set_track+0x25/0x30 [ 28.936357] __kasan_slab_alloc+0x59/0x70 [ 28.936886] kmem_cache_alloc+0x16b/0x370 [ 28.937399] vm_area_dup+0x20/0x160 [ 28.937850] __split_vma+0x170/0x950 [ 28.938320] split_vma+0xc6/0x110 [ 28.938755] mprotect_fixup+0x8d2/0xb30 [ 28.939255] do_mprotect_pkey+0x87e/0xd40 [ 28.939781] __x64_sys_mprotect+0x78/0xc0 [ 28.940299] do_syscall_64+0x3f/0x90 [ 28.940790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.941427] [ 28.941641] Freed by task 19: [ 28.942022] kasan_save_stack+0x22/0x50 [ 28.942523] kasan_set_track+0x25/0x30 [ 28.943019] kasan_save_free_info+0x2b/0x50 [ 28.943546] __kasan_slab_free+0x10a/0x190 [ 28.944079] kmem_cache_free+0x10d/0x4d0 [ 28.944594] rcu_core+0x8c8/0x2860 [ 28.945043] __do_softirq+0x1b7/0x7d4 [ 28.945518] [ 28.945730] Last potentially related work creation: [ 28.946310] kasan_save_stack+0x22/0x50 [ 28.946810] __kasan_record_aux_stack+0x8e/0xa0 [ 28.947379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.948014] remove_vma+0x139/0x170 [ 28.948483] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.949035] do_vmi_munmap+0x1f1/0x2b0 [ 28.949515] __vm_munmap+0x138/0x3a0 [ 28.949978] __x64_sys_munmap+0x59/0x80 [ 28.950470] do_syscall_64+0x3f/0x90 [ 28.950950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.951590] [ 28.951803] Second to last potentially related work creation: [ 28.952491] kasan_save_stack+0x22/0x50 [ 28.952990] __kasan_record_aux_stack+0x8e/0xa0 [ 28.953560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.954205] remove_vma+0x139/0x170 [ 28.954650] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.955205] do_vmi_munmap+0x1f1/0x2b0 [ 28.955689] mmap_region+0x1f9/0x2660 [ 28.956160] do_mmap+0x854/0xf00 [ 28.956596] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.957087] ksys_mmap_pgoff+0x3af/0x500 [ 28.957585] do_syscall_64+0x3f/0x90 [ 28.958057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.958693] [ 28.958907] The buggy address belongs to the object at ffff88800ca63740 [ 28.958907] which belongs to the cache vm_area_struct of size 168 [ 28.960359] The buggy address is located 88 bytes inside of [ 28.960359] freed 168-byte region [ffff88800ca63740, ffff88800ca637e8) [ 28.961765] [ 28.961978] The buggy address belongs to the physical page: [ 28.962639] page:000000008f281b20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xca63 [ 28.963735] memcg:ffff88800df15001 [ 28.964169] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 28.964881] page_type: 0xffffffff() [ 28.965327] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 28.966252] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df15001 [ 28.967161] page dumped because: kasan: bad access detected [ 28.967839] [ 28.968056] Memory state around the buggy address: [ 28.968655] ffff88800ca63680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.969524] ffff88800ca63700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.970389] >ffff88800ca63780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.971247] ^ [ 28.971766] ffff88800ca63800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 28.972688] ffff88800ca63880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 28.973574] ================================================================== [ 28.974659] Disabling lock debugging due to kernel taint [ 30.911082] BUG: Bad rss-counter state mm:0000000084364358 type:MM_FILEPAGES val:33 [ 30.912247] BUG: Bad rss-counter state mm:0000000084364358 type:MM_ANONPAGES val:22 [ 31.338464] BUG: Bad rss-counter state mm:000000009d90b756 type:MM_FILEPAGES val:33 [ 31.339621] BUG: Bad rss-counter state mm:000000009d90b756 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59282' (ECDSA) to the list of known hosts. 2023/06/20 19:32:56 fuzzer started 2023/06/20 19:32:56 dialing manager at localhost:36067 2023/06/20 19:32:56 checking machine... 2023/06/20 19:32:56 checking revisions... [ 32.038038] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:32:56 testing simple program... [ 32.090743] cgroup: Unknown subsys name 'net' [ 32.149982] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:32:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888008d9f900 RCX=0000000000000001 RDX=1ffff110011b3f21 RSI=ffff888008d9fd00 RDI=ffff888008d9f908 RBP=ffff888008d9fd00 RSP=ffff888008d9f858 R8 =0000000000000001 R9 =ffff888008d9f940 R10=0000000000038001 R11=000000000000703a R12=0000000000000008 R13=ffff888008d9f948 R14=ffff888008d9fd00 R15=ffff888008d9f900 RIP=ffffffff81130445 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 0000000000000000 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=00007fe59c734b80 CR3=000000001a3b4000 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=2073692073696854203a45544f4e2023 XMM01=7265737520707520676e697474657320 XMM02=7269766e65204c49414d207372657375 XMM03=646573752065726f6d206f6e20736920 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=6f746365726964202020202020000023 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007fd8d01b1650 CR3=000000000d8c2000 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=2036353a32333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a32333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000