syzkaller login: [ 31.296242] BUG: Bad rss-counter state mm:0000000084a16c98 type:MM_FILEPAGES val:33 [ 31.297421] BUG: Bad rss-counter state mm:0000000084a16c98 type:MM_ANONPAGES val:22 [ 31.341163] ================================================================== [ 31.342452] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.343637] Read of size 8 at addr ffff88800e34b3f8 by task sshd/219 [ 31.344609] [ 31.344885] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.345950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.347176] Call Trace: [ 31.347591] [ 31.347953] dump_stack_lvl+0x91/0xf0 [ 31.348580] print_report+0xcc/0x620 [ 31.349196] ? __virt_addr_valid+0x102/0x340 [ 31.349904] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.350681] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.351486] kasan_report+0xbe/0xf0 [ 31.352146] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.352961] vma_interval_tree_remove+0xc75/0xec0 [ 31.353748] vma_prepare+0xc54/0x11a0 [ 31.354385] __split_vma+0x5af/0x950 [ 31.355004] ? __pfx___split_vma+0x10/0x10 [ 31.355729] ? find_held_lock+0x2c/0x110 [ 31.356424] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.357190] ? lock_is_held_type+0x9f/0x120 [ 31.357913] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.358728] ? mtree_range_walk+0x632/0x900 [ 31.359471] ? mas_walk+0x5c7/0x7c0 [ 31.360133] do_vmi_munmap+0x1f1/0x2b0 [ 31.360796] mmap_region+0x1f9/0x2660 [ 31.361449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.362151] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.363117] ? __pfx_lock_acquire+0x10/0x10 [ 31.363863] ? __pfx_mmap_region+0x10/0x10 [ 31.364583] ? security_mmap_addr+0x7d/0xa0 [ 31.365309] ? get_unmapped_area+0x1f5/0x3f0 [ 31.366049] do_mmap+0x854/0xf00 [ 31.366642] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.367317] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.368095] ksys_mmap_pgoff+0x3af/0x500 [ 31.368786] do_syscall_64+0x3f/0x90 [ 31.369443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370330] RIP: 0033:0x7f6f715b5d82 [ 31.370950] 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 [ 31.373878] RSP: 002b:00007ffc100518a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.375105] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6f715b5d82 [ 31.376257] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6f709ef000 [ 31.377401] RBP: 00007f6f709ef000 R08: 0000000000000009 R09: 0000000000001000 [ 31.378543] R10: 0000000000000812 R11: 0000000000000206 R12: 000056161572df70 [ 31.379696] R13: 00007ffc100518c0 R14: 00007ffc100518f0 R15: 00007ffc10051c50 [ 31.380856] [ 31.381256] [ 31.381539] Allocated by task 212: [ 31.382127] kasan_save_stack+0x22/0x50 [ 31.382801] kasan_set_track+0x25/0x30 [ 31.383582] __kasan_slab_alloc+0x59/0x70 [ 31.384143] kmem_cache_alloc+0x16b/0x370 [ 31.384704] vm_area_dup+0x20/0x160 [ 31.385178] __split_vma+0x170/0x950 [ 31.385671] split_vma+0xc6/0x110 [ 31.386134] mprotect_fixup+0x8d2/0xb30 [ 31.386672] do_mprotect_pkey+0x87e/0xd40 [ 31.387230] __x64_sys_mprotect+0x78/0xc0 [ 31.387802] do_syscall_64+0x3f/0x90 [ 31.388308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.388977] [ 31.389204] Freed by task 212: [ 31.389612] kasan_save_stack+0x22/0x50 [ 31.390138] kasan_set_track+0x25/0x30 [ 31.390656] kasan_save_free_info+0x2b/0x50 [ 31.391212] __kasan_slab_free+0x10a/0x190 [ 31.391786] kmem_cache_free+0x10d/0x4d0 [ 31.392315] rcu_core+0x8c8/0x2860 [ 31.392786] __do_softirq+0x1b7/0x7d4 [ 31.393283] [ 31.393503] Last potentially related work creation: [ 31.394141] kasan_save_stack+0x22/0x50 [ 31.394666] __kasan_record_aux_stack+0x8e/0xa0 [ 31.395279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.395952] remove_vma+0x139/0x170 [ 31.396418] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.396991] do_vmi_munmap+0x1f1/0x2b0 [ 31.397491] __vm_munmap+0x138/0x3a0 [ 31.397973] __x64_sys_munmap+0x59/0x80 [ 31.398492] do_syscall_64+0x3f/0x90 [ 31.398979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399649] [ 31.399876] Second to last potentially related work creation: [ 31.400600] kasan_save_stack+0x22/0x50 [ 31.401118] __kasan_record_aux_stack+0x8e/0xa0 [ 31.401727] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.402410] remove_vma+0x139/0x170 [ 31.402887] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.403474] do_vmi_munmap+0x1f1/0x2b0 [ 31.403998] mmap_region+0x1f9/0x2660 [ 31.404493] do_mmap+0x854/0xf00 [ 31.404934] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.405441] ksys_mmap_pgoff+0x3af/0x500 [ 31.405949] do_syscall_64+0x3f/0x90 [ 31.406442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.407122] [ 31.407345] The buggy address belongs to the object at ffff88800e34b3a0 [ 31.407345] which belongs to the cache vm_area_struct of size 168 [ 31.408866] The buggy address is located 88 bytes inside of [ 31.408866] freed 168-byte region [ffff88800e34b3a0, ffff88800e34b448) [ 31.410337] [ 31.410561] The buggy address belongs to the physical page: [ 31.411252] page:0000000098fc4779 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe34b [ 31.412406] memcg:ffff88800e324801 [ 31.412852] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.413535] page_type: 0xffffffff() [ 31.414005] raw: 0100000000000200 ffff88800879fc80 ffffea0000365cc0 dead000000000006 [ 31.414961] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e324801 [ 31.415936] page dumped because: kasan: bad access detected [ 31.416630] [ 31.416858] Memory state around the buggy address: [ 31.417466] ffff88800e34b280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.418361] ffff88800e34b300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.419263] >ffff88800e34b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.420169] ^ [ 31.421056] ffff88800e34b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.421937] ffff88800e34b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.422815] ================================================================== [ 31.423829] Disabling lock debugging due to kernel taint [ 33.959330] BUG: Bad rss-counter state mm:0000000020246bf5 type:MM_FILEPAGES val:32 [ 33.960333] BUG: Bad rss-counter state mm:0000000020246bf5 type:MM_ANONPAGES val:22 [ 34.469247] BUG: Bad rss-counter state mm:000000001c641c77 type:MM_FILEPAGES val:33 [ 34.470238] BUG: Bad rss-counter state mm:000000001c641c77 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34335' (ECDSA) to the list of known hosts. 2023/06/20 02:09:36 fuzzer started 2023/06/20 02:09:37 dialing manager at localhost:44161 2023/06/20 02:09:37 checking machine... 2023/06/20 02:09:37 checking revisions... [ 35.191376] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:09:37 testing simple program... [ 35.232474] cgroup: Unknown subsys name 'net' [ 35.265560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:09:35 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffff88800f873480 RCX=0000000000000000 RDX=ffff888015a89b40 RSI=ffffffff818e8ffb RDI=ffff88800f873480 RBP=0000000000000009 RSP=ffff88800eaa7ce0 R8 =0000000000000004 R9 =0000000000000009 R10=0000000000000400 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800f8734e0 R14=0000000000000000 R15=ffff88800f873484 RIP=ffffffff8450bdca 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 00007f5ea90ca900 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=00007f5ea9681618 CR3=000000001952e000 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=39303a3230203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363434 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf2c240 RCX=ffffffff813fb340 RDX=ffff888008d751c0 RSI=0000000000000000 RDI=0000000000000005 RBP=00000007fef178c3 RSP=ffff88806cf09f78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=ffff88806cf09ff8 R12=ffff88806cf2c2e0 R13=0000000000060858 R14=ffff88806cf2c2b0 R15=ffff88806cf2c2b8 RIP=ffffffff814c07e4 RFL=00000046 [---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 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=00007fcd166c5940 CR3=0000000019820000 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=2036333a39303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a39303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000