syzkaller login: [ 38.836246] BUG: Bad rss-counter state mm:00000000a67cebbd type:MM_FILEPAGES val:33 [ 38.837431] BUG: Bad rss-counter state mm:00000000a67cebbd type:MM_ANONPAGES val:22 [ 38.877670] ================================================================== [ 38.878630] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.879666] Read of size 8 at addr ffff88800e0a5df0 by task sshd/221 [ 38.880433] [ 38.880649] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.881507] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.882499] Call Trace: [ 38.882821] [ 38.883132] dump_stack_lvl+0x91/0xf0 [ 38.883632] print_report+0xcc/0x620 [ 38.884118] ? __virt_addr_valid+0x102/0x340 [ 38.884676] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885297] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.885917] kasan_report+0xbe/0xf0 [ 38.886391] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.887024] vma_interval_tree_remove+0xc75/0xec0 [ 38.887631] vma_prepare+0xc54/0x11a0 [ 38.888112] __split_vma+0x5af/0x950 [ 38.888583] ? __pfx___split_vma+0x10/0x10 [ 38.889109] ? find_held_lock+0x2c/0x110 [ 38.889632] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.890197] ? lock_is_held_type+0x9f/0x120 [ 38.890747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.891374] ? mtree_range_walk+0x632/0x900 [ 38.891924] ? mas_walk+0x5c7/0x7c0 [ 38.892399] do_vmi_munmap+0x1f1/0x2b0 [ 38.892890] mmap_region+0x1f9/0x2660 [ 38.893373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.893885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.894591] ? __pfx_lock_acquire+0x10/0x10 [ 38.895144] ? __pfx_mmap_region+0x10/0x10 [ 38.895672] ? security_mmap_addr+0x7d/0xa0 [ 38.896199] ? get_unmapped_area+0x1f5/0x3f0 [ 38.896749] do_mmap+0x854/0xf00 [ 38.897187] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.897688] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.898250] ksys_mmap_pgoff+0x3af/0x500 [ 38.898757] do_syscall_64+0x3f/0x90 [ 38.899244] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.899893] RIP: 0033:0x7f395b7fcd82 [ 38.900351] 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 [ 38.902452] RSP: 002b:00007fff9a383438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.903366] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f395b7fcd82 [ 38.904215] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f395ac36000 [ 38.905058] RBP: 00007f395ac36000 R08: 0000000000000009 R09: 0000000000001000 [ 38.905891] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648a1846d90 [ 38.906729] R13: 00007fff9a383450 R14: 00007fff9a383480 R15: 00007fff9a3837e0 [ 38.907597] [ 38.907890] [ 38.908106] Allocated by task 214: [ 38.908534] kasan_save_stack+0x22/0x50 [ 38.909040] kasan_set_track+0x25/0x30 [ 38.909533] __kasan_slab_alloc+0x59/0x70 [ 38.910053] kmem_cache_alloc+0x16b/0x370 [ 38.910565] vm_area_dup+0x20/0x160 [ 38.911034] __split_vma+0x170/0x950 [ 38.911498] split_vma+0xc6/0x110 [ 38.911947] mprotect_fixup+0x8d2/0xb30 [ 38.912453] do_mprotect_pkey+0x87e/0xd40 [ 38.912982] __x64_sys_mprotect+0x78/0xc0 [ 38.913501] do_syscall_64+0x3f/0x90 [ 38.913977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914616] [ 38.914837] Freed by task 214: [ 38.915238] kasan_save_stack+0x22/0x50 [ 38.915756] kasan_set_track+0x25/0x30 [ 38.916251] kasan_save_free_info+0x2b/0x50 [ 38.916784] __kasan_slab_free+0x10a/0x190 [ 38.917317] kmem_cache_free+0x10d/0x4d0 [ 38.917824] rcu_core+0x8c8/0x2860 [ 38.918269] __do_softirq+0x1b7/0x7d4 [ 38.918747] [ 38.918972] Last potentially related work creation: [ 38.919558] kasan_save_stack+0x22/0x50 [ 38.920060] __kasan_record_aux_stack+0x8e/0xa0 [ 38.920658] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.921309] remove_vma+0x139/0x170 [ 38.921753] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.922309] do_vmi_munmap+0x1f1/0x2b0 [ 38.922794] __vm_munmap+0x138/0x3a0 [ 38.923278] __x64_sys_munmap+0x59/0x80 [ 38.923769] do_syscall_64+0x3f/0x90 [ 38.924238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.924881] [ 38.925103] Second to last potentially related work creation: [ 38.925824] kasan_save_stack+0x22/0x50 [ 38.926327] __kasan_record_aux_stack+0x8e/0xa0 [ 38.926905] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.927559] remove_vma+0x139/0x170 [ 38.928006] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.928558] do_vmi_munmap+0x1f1/0x2b0 [ 38.929046] mmap_region+0x1f9/0x2660 [ 38.929523] do_mmap+0x854/0xf00 [ 38.929959] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.930456] ksys_mmap_pgoff+0x3af/0x500 [ 38.930958] do_syscall_64+0x3f/0x90 [ 38.931437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.932079] [ 38.932295] The buggy address belongs to the object at ffff88800e0a5d98 [ 38.932295] which belongs to the cache vm_area_struct of size 168 [ 38.933776] The buggy address is located 88 bytes inside of [ 38.933776] freed 168-byte region [ffff88800e0a5d98, ffff88800e0a5e40) [ 38.935197] [ 38.935415] The buggy address belongs to the physical page: [ 38.936078] page:000000007dc8e90b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0a5 [ 38.937153] memcg:ffff888009797901 [ 38.937579] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.938277] page_type: 0xffffffff() [ 38.938732] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 38.939780] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009797901 [ 38.940692] page dumped because: kasan: bad access detected [ 38.941355] [ 38.941579] Memory state around the buggy address: [ 38.942158] ffff88800e0a5c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 38.943035] ffff88800e0a5d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 38.943891] >ffff88800e0a5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 38.944743] ^ [ 38.945551] ffff88800e0a5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 38.946402] ffff88800e0a5e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.947253] ================================================================== [ 38.948449] Disabling lock debugging due to kernel taint [ 40.848539] BUG: Bad rss-counter state mm:00000000fe9c5f25 type:MM_FILEPAGES val:33 [ 40.849821] BUG: Bad rss-counter state mm:00000000fe9c5f25 type:MM_ANONPAGES val:22 [ 41.334074] BUG: Bad rss-counter state mm:000000008294f18a type:MM_FILEPAGES val:33 [ 41.335156] BUG: Bad rss-counter state mm:000000008294f18a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40798' (ECDSA) to the list of known hosts. 2023/06/20 15:42:47 fuzzer started 2023/06/20 15:42:47 dialing manager at localhost:36067 2023/06/20 15:42:47 checking machine... 2023/06/20 15:42:47 checking revisions... [ 42.075636] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:42:47 testing simple program... [ 42.123474] cgroup: Unknown subsys name 'net' [ 42.174460] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:42:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800f2351c0 RCX=0000000000000000 RDX=1ffff11001e46acd RSI=ffffffff81704d42 RDI=ffff88800f243920 RBP=1ffff11001b40f89 RSP=ffff88800da07c38 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88800f243920 R13=ffffffff81704d42 R14=ffff8880168d9120 R15=ffffffff85d3e300 RIP=ffffffff812d8699 RFL=00000212 [----A--] 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 00007ff217a4e900 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=00007fa45a6f3650 CR3=000000000dc02000 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=284a041d808c4acc00000000000ae988 XMM05=6ae7f10a8ef6a7f60000000000133f18 XMM06=e4cb8bb95a7664b60000000000132a40 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 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=00007fffb6b8d8d8 CR3=0000000019ecc000 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=2037343a32343a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a32343a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000