syzkaller login: [ 29.832321] BUG: Bad rss-counter state mm:000000007c16d771 type:MM_FILEPAGES val:33 [ 29.833575] BUG: Bad rss-counter state mm:000000007c16d771 type:MM_ANONPAGES val:22 [ 29.977761] ================================================================== [ 29.978690] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.979657] Read of size 8 at addr ffff888009ad8880 by task sshd/218 [ 29.980437] [ 29.980663] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.981695] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.982690] Call Trace: [ 29.983020] [ 29.983335] dump_stack_lvl+0x91/0xf0 [ 29.983848] print_report+0xcc/0x620 [ 29.984332] ? __virt_addr_valid+0x102/0x340 [ 29.984897] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.985544] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.986172] kasan_report+0xbe/0xf0 [ 29.986658] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.987309] vma_interval_tree_remove+0xc75/0xec0 [ 29.987923] vma_prepare+0xc54/0x11a0 [ 29.988413] __split_vma+0x5af/0x950 [ 29.988892] ? __pfx___split_vma+0x10/0x10 [ 29.989424] ? find_held_lock+0x2c/0x110 [ 29.989959] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.990541] ? lock_is_held_type+0x9f/0x120 [ 29.991095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.991729] ? mtree_range_walk+0x632/0x900 [ 29.992290] ? mas_walk+0x5c7/0x7c0 [ 29.992774] do_vmi_munmap+0x1f1/0x2b0 [ 29.993271] mmap_region+0x1f9/0x2660 [ 29.993754] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.994266] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.994987] ? __pfx_lock_acquire+0x10/0x10 [ 29.995543] ? __pfx_mmap_region+0x10/0x10 [ 29.996080] ? security_mmap_addr+0x7d/0xa0 [ 29.996618] ? get_unmapped_area+0x1f5/0x3f0 [ 29.997167] do_mmap+0x854/0xf00 [ 29.997605] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.998105] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.998672] ksys_mmap_pgoff+0x3af/0x500 [ 29.999193] do_syscall_64+0x3f/0x90 [ 29.999674] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.000325] RIP: 0033:0x7f0abf01fd82 [ 30.000784] 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 [ 30.002908] RSP: 002b:00007ffe1bdba018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.003852] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0abf01fd82 [ 30.004726] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0abe459000 [ 30.005578] RBP: 00007f0abe459000 R08: 0000000000000009 R09: 0000000000001000 [ 30.006437] R10: 0000000000000812 R11: 0000000000000206 R12: 000055991fd40ec0 [ 30.007293] R13: 00007ffe1bdba030 R14: 00007ffe1bdba060 R15: 00007ffe1bdba3c0 [ 30.008147] [ 30.008439] [ 30.008657] Allocated by task 211: [ 30.009085] kasan_save_stack+0x22/0x50 [ 30.009592] kasan_set_track+0x25/0x30 [ 30.010087] __kasan_slab_alloc+0x59/0x70 [ 30.010613] kmem_cache_alloc+0x16b/0x370 [ 30.011142] vm_area_dup+0x20/0x160 [ 30.011614] __split_vma+0x170/0x950 [ 30.012085] split_vma+0xc6/0x110 [ 30.012528] mprotect_fixup+0x8d2/0xb30 [ 30.013041] do_mprotect_pkey+0x87e/0xd40 [ 30.013572] __x64_sys_mprotect+0x78/0xc0 [ 30.014096] do_syscall_64+0x3f/0x90 [ 30.014568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.015231] [ 30.015451] Freed by task 211: [ 30.015845] kasan_save_stack+0x22/0x50 [ 30.016346] kasan_set_track+0x25/0x30 [ 30.016850] kasan_save_free_info+0x2b/0x50 [ 30.017389] __kasan_slab_free+0x10a/0x190 [ 30.017926] kmem_cache_free+0x10d/0x4d0 [ 30.018442] rcu_core+0x8c8/0x2860 [ 30.018892] __do_softirq+0x1b7/0x7d4 [ 30.019380] [ 30.019597] Last potentially related work creation: [ 30.020181] kasan_save_stack+0x22/0x50 [ 30.020695] __kasan_record_aux_stack+0x8e/0xa0 [ 30.021270] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.021919] remove_vma+0x139/0x170 [ 30.022455] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.023019] do_vmi_munmap+0x1f1/0x2b0 [ 30.023537] __vm_munmap+0x138/0x3a0 [ 30.024005] __x64_sys_munmap+0x59/0x80 [ 30.024509] do_syscall_64+0x3f/0x90 [ 30.024995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.025641] [ 30.025859] Second to last potentially related work creation: [ 30.026545] kasan_save_stack+0x22/0x50 [ 30.027047] __kasan_record_aux_stack+0x8e/0xa0 [ 30.027637] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.028275] remove_vma+0x139/0x170 [ 30.028730] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.029286] do_vmi_munmap+0x1f1/0x2b0 [ 30.029773] mmap_region+0x1f9/0x2660 [ 30.030249] do_mmap+0x854/0xf00 [ 30.030680] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.031174] ksys_mmap_pgoff+0x3af/0x500 [ 30.031683] do_syscall_64+0x3f/0x90 [ 30.032155] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.032797] [ 30.033012] The buggy address belongs to the object at ffff888009ad8828 [ 30.033012] which belongs to the cache vm_area_struct of size 168 [ 30.034474] The buggy address is located 88 bytes inside of [ 30.034474] freed 168-byte region [ffff888009ad8828, ffff888009ad88d0) [ 30.035901] [ 30.036118] The buggy address belongs to the physical page: [ 30.036781] page:000000007fa296bd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9ad8 [ 30.037862] memcg:ffff88800de55801 [ 30.038293] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.038938] page_type: 0xffffffff() [ 30.039402] raw: 0100000000000200 ffff88800879fc80 ffffea00003c5dc0 dead000000000004 [ 30.040334] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de55801 [ 30.041259] page dumped because: kasan: bad access detected [ 30.041932] [ 30.042148] Memory state around the buggy address: [ 30.042724] ffff888009ad8780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.043600] ffff888009ad8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.044458] >ffff888009ad8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.045304] ^ [ 30.045730] ffff888009ad8900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.046616] ffff888009ad8980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 30.047485] ================================================================== [ 30.048422] Disabling lock debugging due to kernel taint [ 32.380082] BUG: Bad rss-counter state mm:000000000806e01a type:MM_FILEPAGES val:33 [ 32.381058] BUG: Bad rss-counter state mm:000000000806e01a type:MM_ANONPAGES val:22 [ 32.857113] BUG: Bad rss-counter state mm:0000000036b9385c type:MM_FILEPAGES val:33 [ 32.858273] BUG: Bad rss-counter state mm:0000000036b9385c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51860' (ECDSA) to the list of known hosts. 2023/06/19 14:42:21 fuzzer started 2023/06/19 14:42:21 dialing manager at localhost:44161 2023/06/19 14:42:21 checking machine... 2023/06/19 14:42:21 checking revisions... [ 33.515721] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:42:21 testing simple program... [ 33.563423] cgroup: Unknown subsys name 'net' [ 33.601604] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:42:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b6880 RDX=0000000000000001 RSI=0000000000000000 RDI=ffffffff863b6882 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008b61a R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff8880160cf9a0 R15=ffff88806ce09a98 RIP=ffffffff81131204 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 00007ff4a88d4700 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=00007f5b3be95618 CR3=0000000016ad8000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383633 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=0000000080000000 RBX=ffffea0000760cb4 RCX=ffffffff816274ea RDX=ffff888009520000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffffea0000760c80 RSP=ffff88800952f140 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000128 R12=0000000000000000 R13=0000000000000002 R14=0000000000000001 R15=ffff88801b9b6940 RIP=ffffffff814c07eb RFL=00000202 [-------] 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=00007f571003c020 CR3=000000000b30e000 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=00000000000000000000000000000000 XMM01=b0afbde2dfc636aa4f4e77cd1d88540a XMM02=ec2efd57dc4c00df000000000011fb18 XMM03=a9931633c559149d000000000011fbe8 XMM04=70d3d03743f82ff500000000000ae988 XMM05=c07224d99728376d00000000001358c8 XMM06=bdf2e299e47b49d500000000001345f8 XMM07=e042d86d42eb936e0000000000123ab0 XMM08=a9931633c559149d000000000011fbe8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000