syzkaller login: [ 30.487056] BUG: Bad rss-counter state mm:0000000091a7c5f5 type:MM_FILEPAGES val:33 [ 30.488332] BUG: Bad rss-counter state mm:0000000091a7c5f5 type:MM_ANONPAGES val:22 [ 30.653407] ================================================================== [ 30.654383] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.655663] Read of size 8 at addr ffff88800e880968 by task sshd/220 [ 30.656770] [ 30.657048] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.658128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.659374] Call Trace: [ 30.659775] [ 30.660125] dump_stack_lvl+0x91/0xf0 [ 30.660742] print_report+0xcc/0x620 [ 30.661349] ? __virt_addr_valid+0x102/0x340 [ 30.662049] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.662826] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.663605] kasan_report+0xbe/0xf0 [ 30.664200] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664974] vma_interval_tree_remove+0xc75/0xec0 [ 30.665733] vma_prepare+0xc54/0x11a0 [ 30.666333] __split_vma+0x5af/0x950 [ 30.666958] ? __pfx___split_vma+0x10/0x10 [ 30.667515] ? find_held_lock+0x2c/0x110 [ 30.668061] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.668653] ? lock_is_held_type+0x9f/0x120 [ 30.669217] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.669868] ? mtree_range_walk+0x632/0x900 [ 30.670465] ? mas_walk+0x5c7/0x7c0 [ 30.670941] do_vmi_munmap+0x1f1/0x2b0 [ 30.671428] mmap_region+0x1f9/0x2660 [ 30.671909] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.672419] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.673142] ? __pfx_lock_acquire+0x10/0x10 [ 30.673680] ? __pfx_mmap_region+0x10/0x10 [ 30.674215] ? security_mmap_addr+0x7d/0xa0 [ 30.674760] ? get_unmapped_area+0x1f5/0x3f0 [ 30.675316] do_mmap+0x854/0xf00 [ 30.675755] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.676250] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.676818] ksys_mmap_pgoff+0x3af/0x500 [ 30.677328] do_syscall_64+0x3f/0x90 [ 30.677814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678498] RIP: 0033:0x7fd1ecd29d82 [ 30.678966] 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 [ 30.681084] RSP: 002b:00007ffdf141fa88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.681993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd1ecd29d82 [ 30.682848] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd1ec163000 [ 30.683685] RBP: 00007fd1ec163000 R08: 0000000000000009 R09: 0000000000001000 [ 30.684533] R10: 0000000000000812 R11: 0000000000000206 R12: 00005570a66b3ec0 [ 30.685420] R13: 00007ffdf141faa0 R14: 00007ffdf141fad0 R15: 00007ffdf141fe30 [ 30.686329] [ 30.686642] [ 30.686863] Allocated by task 213: [ 30.687321] kasan_save_stack+0x22/0x50 [ 30.687863] kasan_set_track+0x25/0x30 [ 30.688378] __kasan_slab_alloc+0x59/0x70 [ 30.688931] kmem_cache_alloc+0x16b/0x370 [ 30.689473] vm_area_dup+0x20/0x160 [ 30.689950] __split_vma+0x170/0x950 [ 30.690462] split_vma+0xc6/0x110 [ 30.690925] mprotect_fixup+0x8d2/0xb30 [ 30.691452] do_mprotect_pkey+0x87e/0xd40 [ 30.692012] __x64_sys_mprotect+0x78/0xc0 [ 30.692564] do_syscall_64+0x3f/0x90 [ 30.693064] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693749] [ 30.693973] Freed by task 19: [ 30.694377] kasan_save_stack+0x22/0x50 [ 30.694922] kasan_set_track+0x25/0x30 [ 30.695436] kasan_save_free_info+0x2b/0x50 [ 30.696006] __kasan_slab_free+0x10a/0x190 [ 30.696558] kmem_cache_free+0x10d/0x4d0 [ 30.697097] rcu_core+0x8c8/0x2860 [ 30.697567] __do_softirq+0x1b7/0x7d4 [ 30.698075] [ 30.698298] Last potentially related work creation: [ 30.698939] kasan_save_stack+0x22/0x50 [ 30.699467] __kasan_record_aux_stack+0x8e/0xa0 [ 30.700078] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.700768] remove_vma+0x139/0x170 [ 30.701229] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.701789] do_vmi_munmap+0x1f1/0x2b0 [ 30.702275] __vm_munmap+0x138/0x3a0 [ 30.702764] __x64_sys_munmap+0x59/0x80 [ 30.703260] do_syscall_64+0x3f/0x90 [ 30.703736] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.704396] [ 30.704612] Second to last potentially related work creation: [ 30.705306] kasan_save_stack+0x22/0x50 [ 30.705834] __kasan_record_aux_stack+0x8e/0xa0 [ 30.706438] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.707080] remove_vma+0x139/0x170 [ 30.707531] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.708087] do_vmi_munmap+0x1f1/0x2b0 [ 30.708567] mmap_region+0x1f9/0x2660 [ 30.709042] do_mmap+0x854/0xf00 [ 30.709470] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.709962] ksys_mmap_pgoff+0x3af/0x500 [ 30.710478] do_syscall_64+0x3f/0x90 [ 30.710950] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.711592] [ 30.711811] The buggy address belongs to the object at ffff88800e880910 [ 30.711811] which belongs to the cache vm_area_struct of size 168 [ 30.713272] The buggy address is located 88 bytes inside of [ 30.713272] freed 168-byte region [ffff88800e880910, ffff88800e8809b8) [ 30.714695] [ 30.714909] The buggy address belongs to the physical page: [ 30.715567] page:000000007d3fe211 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe880 [ 30.716652] memcg:ffff88800c5ec501 [ 30.717079] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.717719] page_type: 0xffffffff() [ 30.718172] raw: 0100000000000200 ffff8880087a0c80 ffffea000038bec0 dead000000000006 [ 30.719108] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5ec501 [ 30.720013] page dumped because: kasan: bad access detected [ 30.720668] [ 30.720884] Memory state around the buggy address: [ 30.721463] ffff88800e880800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.722325] ffff88800e880880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.723204] >ffff88800e880900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.724055] ^ [ 30.724881] ffff88800e880980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.725760] ffff88800e880a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.726639] ================================================================== [ 30.727694] Disabling lock debugging due to kernel taint [ 32.644931] BUG: Bad rss-counter state mm:00000000718bc676 type:MM_FILEPAGES val:33 [ 32.645921] BUG: Bad rss-counter state mm:00000000718bc676 type:MM_ANONPAGES val:22 [ 33.136904] BUG: Bad rss-counter state mm:00000000e75d19b0 type:MM_FILEPAGES val:33 [ 33.138716] BUG: Bad rss-counter state mm:00000000e75d19b0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21164' (ECDSA) to the list of known hosts. 2023/06/21 01:06:40 fuzzer started 2023/06/21 01:06:40 dialing manager at localhost:36067 2023/06/21 01:06:40 checking machine... 2023/06/21 01:06:40 checking revisions... [ 33.923591] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:06:40 testing simple program... [ 33.983263] cgroup: Unknown subsys name 'net' [ 34.059869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:06:40 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fc6c9ccd000 CR3=0000000009a94000 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=2d5eb35312c589993f4a7f8824a6b2f6 XMM02=0000000000119c30ec2efd57dc4c00df XMM03=000000000012191812252a954b8fce9f XMM04=53ce629abdca77aa00000000000ae988 XMM05=19e9129bd510f2350000000000132ab0 XMM06=254517afef5d22680000000000131918 XMM07=e042d86d42eb936e0000000000121b98 XMM08=12252a954b8fce9f0000000000119c90 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8171120a RDX=ffff8880101551c0 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888009ee7d90 RSP=ffff888009ee7bf8 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=ffffea0000604680 R13=ffff88800c696740 R14=ffff888009ee7db8 R15=ffffea00006046b4 RIP=ffffffff814c0864 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0eb18d3900 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=00007f0eb2475968 CR3=0000000016d50000 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=6720646572637465733a4d41503d706f 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