syzkaller login: [ 30.728774] BUG: Bad rss-counter state mm:000000005812901b type:MM_FILEPAGES val:33 [ 30.729996] BUG: Bad rss-counter state mm:000000005812901b type:MM_ANONPAGES val:22 [ 30.841567] ================================================================== [ 30.842614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.843805] Read of size 8 at addr ffff88800fd17ed8 by task sshd/221 [ 30.844682] [ 30.844942] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.845953] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.847078] Call Trace: [ 30.847473] [ 30.847801] dump_stack_lvl+0x91/0xf0 [ 30.848373] print_report+0xcc/0x620 [ 30.848929] ? __virt_addr_valid+0x102/0x340 [ 30.849563] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.850280] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.851005] kasan_report+0xbe/0xf0 [ 30.851576] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.852298] vma_interval_tree_remove+0xc75/0xec0 [ 30.852997] vma_prepare+0xc54/0x11a0 [ 30.853555] __split_vma+0x5af/0x950 [ 30.854103] ? __pfx___split_vma+0x10/0x10 [ 30.854725] ? find_held_lock+0x2c/0x110 [ 30.855325] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.855995] ? lock_is_held_type+0x9f/0x120 [ 30.856631] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.857333] ? mtree_range_walk+0x632/0x900 [ 30.857981] ? mas_walk+0x5c7/0x7c0 [ 30.858533] do_vmi_munmap+0x1f1/0x2b0 [ 30.859101] mmap_region+0x1f9/0x2660 [ 30.859678] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.860258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.861112] ? __pfx_lock_acquire+0x10/0x10 [ 30.861736] ? __pfx_mmap_region+0x10/0x10 [ 30.862339] ? security_mmap_addr+0x7d/0xa0 [ 30.862962] ? get_unmapped_area+0x1f5/0x3f0 [ 30.863598] do_mmap+0x854/0xf00 [ 30.864103] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.864687] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.865332] ksys_mmap_pgoff+0x3af/0x500 [ 30.865913] do_syscall_64+0x3f/0x90 [ 30.866459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.867199] RIP: 0033:0x7fee16dc3d82 [ 30.867736] 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 [ 30.870137] RSP: 002b:00007ffd7958af88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.871166] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fee16dc3d82 [ 30.872129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fee161fd000 [ 30.873092] RBP: 00007fee161fd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.874049] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e08e0b4f70 [ 30.875011] R13: 00007ffd7958afa0 R14: 00007ffd7958afd0 R15: 00007ffd7958b330 [ 30.875991] [ 30.876327] [ 30.876575] Allocated by task 214: [ 30.877071] kasan_save_stack+0x22/0x50 [ 30.877649] kasan_set_track+0x25/0x30 [ 30.878212] __kasan_slab_alloc+0x59/0x70 [ 30.878815] kmem_cache_alloc+0x16b/0x370 [ 30.879423] vm_area_dup+0x20/0x160 [ 30.879941] __split_vma+0x170/0x950 [ 30.880482] split_vma+0xc6/0x110 [ 30.880985] mprotect_fixup+0x8d2/0xb30 [ 30.881563] do_mprotect_pkey+0x87e/0xd40 [ 30.882160] __x64_sys_mprotect+0x78/0xc0 [ 30.882760] do_syscall_64+0x3f/0x90 [ 30.883299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.884032] [ 30.884274] Freed by task 13: [ 30.884701] kasan_save_stack+0x22/0x50 [ 30.885268] kasan_set_track+0x25/0x30 [ 30.885827] kasan_save_free_info+0x2b/0x50 [ 30.886429] __kasan_slab_free+0x10a/0x190 [ 30.887032] kmem_cache_free+0x10d/0x4d0 [ 30.887612] rcu_core+0x8c8/0x2860 [ 30.888115] __do_softirq+0x1b7/0x7d4 [ 30.888659] [ 30.888900] Last potentially related work creation: [ 30.889567] kasan_save_stack+0x22/0x50 [ 30.890135] __kasan_record_aux_stack+0x8e/0xa0 [ 30.890782] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.891529] remove_vma+0x139/0x170 [ 30.892041] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.892669] do_vmi_munmap+0x1f1/0x2b0 [ 30.893218] __vm_munmap+0x138/0x3a0 [ 30.893748] __x64_sys_munmap+0x59/0x80 [ 30.894304] do_syscall_64+0x3f/0x90 [ 30.894844] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.895597] [ 30.895841] The buggy address belongs to the object at ffff88800fd17e80 [ 30.895841] which belongs to the cache vm_area_struct of size 168 [ 30.897530] The buggy address is located 88 bytes inside of [ 30.897530] freed 168-byte region [ffff88800fd17e80, ffff88800fd17f28) [ 30.899147] [ 30.899388] The buggy address belongs to the physical page: [ 30.900161] page:000000001807a566 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd17 [ 30.901387] memcg:ffff88800ca79901 [ 30.901868] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.902601] page_type: 0xffffffff() [ 30.903115] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.904167] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca79901 [ 30.905199] page dumped because: kasan: bad access detected [ 30.905944] [ 30.906188] Memory state around the buggy address: [ 30.906840] ffff88800fd17d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.907804] ffff88800fd17e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.908762] >ffff88800fd17e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.909707] ^ [ 30.910523] ffff88800fd17f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.911517] ffff88800fd17f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.912471] ================================================================== [ 30.913743] Disabling lock debugging due to kernel taint [ 33.026795] BUG: Bad rss-counter state mm:00000000d4b9c296 type:MM_FILEPAGES val:33 [ 33.027987] BUG: Bad rss-counter state mm:00000000d4b9c296 type:MM_ANONPAGES val:22 [ 33.525081] BUG: Bad rss-counter state mm:0000000057100751 type:MM_FILEPAGES val:33 [ 33.526258] BUG: Bad rss-counter state mm:0000000057100751 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5924' (ECDSA) to the list of known hosts. 2023/06/20 13:32:01 fuzzer started 2023/06/20 13:32:02 dialing manager at localhost:36067 2023/06/20 13:32:02 checking machine... 2023/06/20 13:32:02 checking revisions... [ 34.263241] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:32:02 testing simple program... [ 34.306065] cgroup: Unknown subsys name 'net' [ 34.375695] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:32:01 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff81ef0fb8 RDX=ffff888016c6d1c0 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801611fd00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000002 R14=ffff88800f3d9400 R15=ffff88801611fec8 RIP=ffffffff814c027c 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 00007f0fc7fff700 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=00007fd3f0328860 CR3=000000000fbe6000 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=2031303a32333a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a32333a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f0c77f8 RCX=0000000000000001 RDX=1ffff11001e18f01 RSI=ffffffff81809a91 RDI=ffff88800f0c7808 RBP=ffff88800f0c77c8 RSP=ffff88800f0c7710 R8 =0000000000000001 R9 =ffff88800f0c7770 R10=0000000000038001 R11=000000000000fc0c R12=ffff88800f0c77f8 R13=0000000000000000 R14=ffff8880090a3680 R15=0000000000000024 RIP=ffffffff813ad496 RFL=00000282 [--S----] 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 00007f3f6ff53900 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=00007fff1e641000 CR3=0000000009752000 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=6720646572637465733a4d41503d706f 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