syzkaller login: [ 44.424766] BUG: Bad rss-counter state mm:00000000680b8bd0 type:MM_FILEPAGES val:33 [ 44.425859] BUG: Bad rss-counter state mm:00000000680b8bd0 type:MM_ANONPAGES val:22 [ 44.601377] ================================================================== [ 44.602333] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.603331] Read of size 8 at addr ffff88800c771228 by task sshd/220 [ 44.604244] [ 44.604486] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.605394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.606440] Call Trace: [ 44.606775] [ 44.607082] dump_stack_lvl+0x91/0xf0 [ 44.607601] print_report+0xcc/0x620 [ 44.608112] ? __virt_addr_valid+0x102/0x340 [ 44.608703] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.609361] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.610018] kasan_report+0xbe/0xf0 [ 44.610520] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.611181] vma_interval_tree_remove+0xc75/0xec0 [ 44.611822] vma_prepare+0xc54/0x11a0 [ 44.612361] __split_vma+0x5af/0x950 [ 44.612886] ? __pfx___split_vma+0x10/0x10 [ 44.613471] ? find_held_lock+0x2c/0x110 [ 44.614042] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.614658] ? lock_is_held_type+0x9f/0x120 [ 44.615251] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.615914] ? mtree_range_walk+0x632/0x900 [ 44.616526] ? mas_walk+0x5c7/0x7c0 [ 44.617053] do_vmi_munmap+0x1f1/0x2b0 [ 44.617600] mmap_region+0x1f9/0x2660 [ 44.618128] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.618685] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.619470] ? __pfx_lock_acquire+0x10/0x10 [ 44.620055] ? __pfx_mmap_region+0x10/0x10 [ 44.620646] ? security_mmap_addr+0x7d/0xa0 [ 44.621226] ? get_unmapped_area+0x1f5/0x3f0 [ 44.621822] do_mmap+0x854/0xf00 [ 44.622307] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.622848] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.623462] ksys_mmap_pgoff+0x3af/0x500 [ 44.624019] do_syscall_64+0x3f/0x90 [ 44.624557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.625268] RIP: 0033:0x7fbe87dc7d82 [ 44.625774] 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 [ 44.628108] RSP: 002b:00007fffa0e9d048 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.629108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe87dc7d82 [ 44.630048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe87201000 [ 44.630980] RBP: 00007fbe87201000 R08: 0000000000000009 R09: 0000000000001000 [ 44.631910] R10: 0000000000000812 R11: 0000000000000206 R12: 000056184a886ec0 [ 44.632859] R13: 00007fffa0e9d060 R14: 00007fffa0e9d090 R15: 00007fffa0e9d3f0 [ 44.633802] [ 44.634124] [ 44.634360] Allocated by task 213: [ 44.634825] kasan_save_stack+0x22/0x50 [ 44.635376] kasan_set_track+0x25/0x30 [ 44.635938] __kasan_slab_alloc+0x59/0x70 [ 44.636520] kmem_cache_alloc+0x16b/0x370 [ 44.637089] vm_area_dup+0x20/0x160 [ 44.637584] __split_vma+0x170/0x950 [ 44.638098] split_vma+0xc6/0x110 [ 44.638577] mprotect_fixup+0x8d2/0xb30 [ 44.639127] do_mprotect_pkey+0x87e/0xd40 [ 44.639698] __x64_sys_mprotect+0x78/0xc0 [ 44.640275] do_syscall_64+0x3f/0x90 [ 44.640801] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.641500] [ 44.641733] Freed by task 13: [ 44.642154] kasan_save_stack+0x22/0x50 [ 44.642704] kasan_set_track+0x25/0x30 [ 44.643243] kasan_save_free_info+0x2b/0x50 [ 44.643830] __kasan_slab_free+0x10a/0x190 [ 44.644433] kmem_cache_free+0x10d/0x4d0 [ 44.644986] rcu_core+0x8c8/0x2860 [ 44.645474] __do_softirq+0x1b7/0x7d4 [ 44.646007] [ 44.646245] Last potentially related work creation: [ 44.646890] kasan_save_stack+0x22/0x50 [ 44.647444] __kasan_record_aux_stack+0x8e/0xa0 [ 44.648075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.648785] remove_vma+0x139/0x170 [ 44.649287] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.649900] do_vmi_munmap+0x1f1/0x2b0 [ 44.650436] __vm_munmap+0x138/0x3a0 [ 44.650951] __x64_sys_munmap+0x59/0x80 [ 44.651498] do_syscall_64+0x3f/0x90 [ 44.652019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.652719] [ 44.652955] Second to last potentially related work creation: [ 44.653703] kasan_save_stack+0x22/0x50 [ 44.654247] __kasan_record_aux_stack+0x8e/0xa0 [ 44.654869] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.655575] remove_vma+0x139/0x170 [ 44.656074] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.656703] do_vmi_munmap+0x1f1/0x2b0 [ 44.657239] mmap_region+0x1f9/0x2660 [ 44.657759] do_mmap+0x854/0xf00 [ 44.658236] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.658773] ksys_mmap_pgoff+0x3af/0x500 [ 44.659328] do_syscall_64+0x3f/0x90 [ 44.659863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.660602] [ 44.660829] The buggy address belongs to the object at ffff88800c7711d0 [ 44.660829] which belongs to the cache vm_area_struct of size 168 [ 44.662397] The buggy address is located 88 bytes inside of [ 44.662397] freed 168-byte region [ffff88800c7711d0, ffff88800c771278) [ 44.663900] [ 44.664129] The buggy address belongs to the physical page: [ 44.664832] page:0000000020011172 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc771 [ 44.665968] memcg:ffff88800c9ddc01 [ 44.666428] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 44.667161] page_type: 0xffffffff() [ 44.667634] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 44.668614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9ddc01 [ 44.669570] page dumped because: kasan: bad access detected [ 44.670265] [ 44.670494] Memory state around the buggy address: [ 44.671104] ffff88800c771100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.672026] ffff88800c771180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 44.672938] >ffff88800c771200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 44.673838] ^ [ 44.674427] ffff88800c771280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 44.675333] ffff88800c771300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 44.676245] ================================================================== [ 44.677379] Disabling lock debugging due to kernel taint [ 46.625890] BUG: Bad rss-counter state mm:00000000f96e5cf4 type:MM_FILEPAGES val:33 [ 46.627472] BUG: Bad rss-counter state mm:00000000f96e5cf4 type:MM_ANONPAGES val:22 [ 47.189447] BUG: Bad rss-counter state mm:000000007efb6179 type:MM_FILEPAGES val:33 [ 47.190607] BUG: Bad rss-counter state mm:000000007efb6179 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16610' (ECDSA) to the list of known hosts. 2023/06/19 19:33:17 fuzzer started 2023/06/19 19:33:17 dialing manager at localhost:44161 2023/06/19 19:33:17 checking machine... 2023/06/19 19:33:17 checking revisions... [ 47.833230] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:33:17 testing simple program... [ 47.876383] cgroup: Unknown subsys name 'net' [ 47.916522] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:33:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce09b40 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff84506c7f RDI=ffff88806ce09b4c RBP=000000000000001d RSP=ffff88806ce09a58 R8 =0000000000000001 R9 =ffff88806ce09ab8 R10=0000000000038001 R11=0000000000022733 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff88800db10000 R15=ffff888017b02780 RIP=ffffffff813ad4b6 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 00007f30193ec700 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=00007ffd5dafbdb8 CR3=000000000c72c000 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=2036313a33333a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a33333a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=dffffc0000000000 RCX=ffffffff818cf59c RDX=ffff8880146e1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888016135be8 RSP=ffff8880146a7a58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff818cf549 R14=0000000000000001 R15=ffff8880146a7df0 RIP=ffffffff814c07eb 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 00007fb965303900 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=00007fef458f2650 CR3=000000000d8d0000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=404c3cf37cd2cd1500000000000ae988 XMM05=3c11a8bf089e77b70000000000136990 XMM06=4fda316b135da52b0000000000135780 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000