syzkaller login: [ 31.102414] BUG: Bad rss-counter state mm:00000000cf1af774 type:MM_FILEPAGES val:33 [ 31.103602] BUG: Bad rss-counter state mm:00000000cf1af774 type:MM_ANONPAGES val:22 [ 31.258547] ================================================================== [ 31.259656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.260805] Read of size 8 at addr ffff888019f3fdf0 by task sshd/220 [ 31.261793] [ 31.262018] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.262911] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.263928] Call Trace: [ 31.264255] [ 31.264547] dump_stack_lvl+0x91/0xf0 [ 31.265049] print_report+0xcc/0x620 [ 31.265567] ? __virt_addr_valid+0x102/0x340 [ 31.266126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266766] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267391] kasan_report+0xbe/0xf0 [ 31.267886] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.268542] vma_interval_tree_remove+0xc75/0xec0 [ 31.269154] vma_prepare+0xc54/0x11a0 [ 31.269653] __split_vma+0x5af/0x950 [ 31.270122] ? __pfx___split_vma+0x10/0x10 [ 31.270650] ? find_held_lock+0x2c/0x110 [ 31.271169] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.271729] ? lock_is_held_type+0x9f/0x120 [ 31.272267] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.272872] ? mtree_range_walk+0x632/0x900 [ 31.273432] ? mas_walk+0x5c7/0x7c0 [ 31.273907] do_vmi_munmap+0x1f1/0x2b0 [ 31.274400] mmap_region+0x1f9/0x2660 [ 31.274878] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.275389] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.276097] ? __pfx_lock_acquire+0x10/0x10 [ 31.276623] ? __pfx_mmap_region+0x10/0x10 [ 31.277150] ? security_mmap_addr+0x7d/0xa0 [ 31.277688] ? get_unmapped_area+0x1f5/0x3f0 [ 31.278244] do_mmap+0x854/0xf00 [ 31.278678] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.279168] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.279730] ksys_mmap_pgoff+0x3af/0x500 [ 31.280235] do_syscall_64+0x3f/0x90 [ 31.280717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.281394] RIP: 0033:0x7f8e70bd4d82 [ 31.281845] 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 [ 31.283960] RSP: 002b:00007fffa315d258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.284869] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e70bd4d82 [ 31.285723] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e7000e000 [ 31.286596] RBP: 00007f8e7000e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.287475] R10: 0000000000000812 R11: 0000000000000206 R12: 000056155e15bf70 [ 31.288328] R13: 00007fffa315d270 R14: 00007fffa315d2a0 R15: 00007fffa315d600 [ 31.289191] [ 31.289498] [ 31.289711] Allocated by task 213: [ 31.290150] kasan_save_stack+0x22/0x50 [ 31.290668] kasan_set_track+0x25/0x30 [ 31.291172] __kasan_slab_alloc+0x59/0x70 [ 31.291705] kmem_cache_alloc+0x16b/0x370 [ 31.292236] vm_area_dup+0x20/0x160 [ 31.292702] __split_vma+0x170/0x950 [ 31.293182] split_vma+0xc6/0x110 [ 31.293662] mprotect_fixup+0x8d2/0xb30 [ 31.294180] do_mprotect_pkey+0x87e/0xd40 [ 31.294716] __x64_sys_mprotect+0x78/0xc0 [ 31.295250] do_syscall_64+0x3f/0x90 [ 31.295721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.296370] [ 31.296583] Freed by task 213: [ 31.296973] kasan_save_stack+0x22/0x50 [ 31.297485] kasan_set_track+0x25/0x30 [ 31.297973] kasan_save_free_info+0x2b/0x50 [ 31.298514] __kasan_slab_free+0x10a/0x190 [ 31.299064] kmem_cache_free+0x10d/0x4d0 [ 31.299566] rcu_core+0x8c8/0x2860 [ 31.300025] __do_softirq+0x1b7/0x7d4 [ 31.300518] [ 31.300739] Last potentially related work creation: [ 31.301368] kasan_save_stack+0x22/0x50 [ 31.301884] __kasan_record_aux_stack+0x8e/0xa0 [ 31.302534] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.303194] remove_vma+0x139/0x170 [ 31.303666] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.304225] do_vmi_munmap+0x1f1/0x2b0 [ 31.304716] __vm_munmap+0x138/0x3a0 [ 31.305186] __x64_sys_munmap+0x59/0x80 [ 31.305691] do_syscall_64+0x3f/0x90 [ 31.306170] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.306821] [ 31.307038] Second to last potentially related work creation: [ 31.307715] kasan_save_stack+0x22/0x50 [ 31.308216] __kasan_record_aux_stack+0x8e/0xa0 [ 31.308784] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.309431] remove_vma+0x139/0x170 [ 31.309879] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.310429] do_vmi_munmap+0x1f1/0x2b0 [ 31.310916] mmap_region+0x1f9/0x2660 [ 31.311393] do_mmap+0x854/0xf00 [ 31.311825] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.312311] ksys_mmap_pgoff+0x3af/0x500 [ 31.312813] do_syscall_64+0x3f/0x90 [ 31.313311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.313955] [ 31.314178] The buggy address belongs to the object at ffff888019f3fd98 [ 31.314178] which belongs to the cache vm_area_struct of size 168 [ 31.315662] The buggy address is located 88 bytes inside of [ 31.315662] freed 168-byte region [ffff888019f3fd98, ffff888019f3fe40) [ 31.317078] [ 31.317306] The buggy address belongs to the physical page: [ 31.317968] page:00000000818b21ef refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f3f [ 31.319069] memcg:ffff888019fbe901 [ 31.319501] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.320154] page_type: 0xffffffff() [ 31.320608] raw: 0100000000000200 ffff8880087a0c80 ffffea00003ee8c0 dead000000000006 [ 31.321555] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019fbe901 [ 31.322465] page dumped because: kasan: bad access detected [ 31.323121] [ 31.323342] Memory state around the buggy address: [ 31.323919] ffff888019f3fc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.324778] ffff888019f3fd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.325651] >ffff888019f3fd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.326501] ^ [ 31.327316] ffff888019f3fe00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.328177] ffff888019f3fe80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.329030] ================================================================== [ 31.330033] Disabling lock debugging due to kernel taint [ 33.271695] BUG: Bad rss-counter state mm:0000000086e71348 type:MM_FILEPAGES val:33 [ 33.272684] BUG: Bad rss-counter state mm:0000000086e71348 type:MM_ANONPAGES val:22 [ 33.749166] BUG: Bad rss-counter state mm:000000001621b1f2 type:MM_FILEPAGES val:33 [ 33.750226] BUG: Bad rss-counter state mm:000000001621b1f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22581' (ECDSA) to the list of known hosts. 2023/06/20 15:54:24 fuzzer started 2023/06/20 15:54:24 dialing manager at localhost:36067 2023/06/20 15:54:24 checking machine... 2023/06/20 15:54:24 checking revisions... [ 34.490989] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:54:25 testing simple program... [ 34.543470] cgroup: Unknown subsys name 'net' [ 34.597439] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:24 Registers: info registers vcpu 0 RAX=0000000000000020 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016750000 RSI=ffffffff848996c0 RDI=0000000000000000 RBP=ffffffff848996c0 RSP=ffff88800ece7d78 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0476 RFL=00000293 [--S-A-C] 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 00007f2cc8bef700 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=00007f315644e000 CR3=000000000eca4000 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=2034323a34353a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a34353a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000017173d3144 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000017 RSI=ffff88806cf28140 RDI=000000000005380f RBP=ffff88806cf28140 RSP=ffff88806cf09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000ef07c R11=0000000000000001 R12=000000000005380f R13=0000000000000000 R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff81106295 RFL=00000016 [----AP-] 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 00007f9ea8b84900 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=00007f9ea8b4e008 CR3=000000001031e000 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=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