syzkaller login: [ 61.054322] BUG: Bad rss-counter state mm:000000001b8a505e type:MM_FILEPAGES val:33 [ 61.055554] BUG: Bad rss-counter state mm:000000001b8a505e type:MM_ANONPAGES val:22 [ 61.205476] ================================================================== [ 61.206336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.207209] Read of size 8 at addr ffff88800d612880 by task sshd/221 [ 61.207928] [ 61.208132] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.209027] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.209942] Call Trace: [ 61.210242] [ 61.210512] dump_stack_lvl+0x91/0xf0 [ 61.210973] print_report+0xcc/0x620 [ 61.211435] ? __virt_addr_valid+0x102/0x340 [ 61.211951] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.212536] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.213120] kasan_report+0xbe/0xf0 [ 61.213569] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.214161] vma_interval_tree_remove+0xc75/0xec0 [ 61.214736] vma_prepare+0xc54/0x11a0 [ 61.215186] __split_vma+0x5af/0x950 [ 61.215639] ? __pfx___split_vma+0x10/0x10 [ 61.216138] ? find_held_lock+0x2c/0x110 [ 61.216634] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.217159] ? lock_is_held_type+0x9f/0x120 [ 61.217697] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.218309] ? mtree_range_walk+0x632/0x900 [ 61.218867] ? mas_walk+0x5c7/0x7c0 [ 61.219345] do_vmi_munmap+0x1f1/0x2b0 [ 61.219839] mmap_region+0x1f9/0x2660 [ 61.220320] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.220837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.221557] ? __pfx_lock_acquire+0x10/0x10 [ 61.222109] ? __pfx_mmap_region+0x10/0x10 [ 61.222645] ? security_mmap_addr+0x7d/0xa0 [ 61.223178] ? get_unmapped_area+0x1f5/0x3f0 [ 61.223736] do_mmap+0x854/0xf00 [ 61.224179] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.224673] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.225235] ksys_mmap_pgoff+0x3af/0x500 [ 61.225747] do_syscall_64+0x3f/0x90 [ 61.226235] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.226882] RIP: 0033:0x7f8ddc16dd82 [ 61.227337] 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 [ 61.229497] RSP: 002b:00007ffe29a68338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.230434] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ddc16dd82 [ 61.231302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ddb5a7000 [ 61.232165] RBP: 00007f8ddb5a7000 R08: 0000000000000009 R09: 0000000000001000 [ 61.233024] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562172556b20 [ 61.233886] R13: 00007ffe29a68350 R14: 00007ffe29a68380 R15: 00007ffe29a686e0 [ 61.234758] [ 61.235050] [ 61.235263] Allocated by task 214: [ 61.235694] kasan_save_stack+0x22/0x50 [ 61.236199] kasan_set_track+0x25/0x30 [ 61.236688] __kasan_slab_alloc+0x59/0x70 [ 61.237215] kmem_cache_alloc+0x16b/0x370 [ 61.237761] vm_area_dup+0x20/0x160 [ 61.238216] __split_vma+0x170/0x950 [ 61.238688] split_vma+0xc6/0x110 [ 61.239117] mprotect_fixup+0x8d2/0xb30 [ 61.239622] do_mprotect_pkey+0x87e/0xd40 [ 61.240152] __x64_sys_mprotect+0x78/0xc0 [ 61.240685] do_syscall_64+0x3f/0x90 [ 61.241156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.241810] [ 61.242030] Freed by task 214: [ 61.242426] kasan_save_stack+0x22/0x50 [ 61.242927] kasan_set_track+0x25/0x30 [ 61.243422] kasan_save_free_info+0x2b/0x50 [ 61.243964] __kasan_slab_free+0x10a/0x190 [ 61.244505] kmem_cache_free+0x10d/0x4d0 [ 61.245015] rcu_core+0x8c8/0x2860 [ 61.245462] __do_softirq+0x1b7/0x7d4 [ 61.245955] [ 61.246173] Last potentially related work creation: [ 61.246767] kasan_save_stack+0x22/0x50 [ 61.247266] __kasan_record_aux_stack+0x8e/0xa0 [ 61.247835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.248487] remove_vma+0x139/0x170 [ 61.248945] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.249509] do_vmi_munmap+0x1f1/0x2b0 [ 61.250020] __vm_munmap+0x138/0x3a0 [ 61.250495] __x64_sys_munmap+0x59/0x80 [ 61.250988] do_syscall_64+0x3f/0x90 [ 61.251465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.252113] [ 61.252333] The buggy address belongs to the object at ffff88800d612828 [ 61.252333] which belongs to the cache vm_area_struct of size 168 [ 61.253833] The buggy address is located 88 bytes inside of [ 61.253833] freed 168-byte region [ffff88800d612828, ffff88800d6128d0) [ 61.255248] [ 61.255469] The buggy address belongs to the physical page: [ 61.256134] page:0000000054d68bc8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd612 [ 61.257235] memcg:ffff88800f000301 [ 61.257672] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.258320] page_type: 0xffffffff() [ 61.258780] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.259705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f000301 [ 61.260619] page dumped because: kasan: bad access detected [ 61.261294] [ 61.261506] Memory state around the buggy address: [ 61.262108] ffff88800d612780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 61.262977] ffff88800d612800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 61.263843] >ffff88800d612880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 61.264705] ^ [ 61.265119] ffff88800d612900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.265994] ffff88800d612980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 61.266852] ================================================================== [ 61.267910] Disabling lock debugging due to kernel taint [ 63.464286] BUG: Bad rss-counter state mm:000000000c618f4c type:MM_FILEPAGES val:33 [ 63.465529] BUG: Bad rss-counter state mm:000000000c618f4c type:MM_ANONPAGES val:22 [ 63.885381] BUG: Bad rss-counter state mm:00000000dcb8b67e type:MM_FILEPAGES val:33 [ 63.886394] BUG: Bad rss-counter state mm:00000000dcb8b67e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52936' (ECDSA) to the list of known hosts. 2023/06/20 22:54:37 fuzzer started 2023/06/20 22:54:37 dialing manager at localhost:36067 2023/06/20 22:54:37 checking machine... 2023/06/20 22:54:37 checking revisions... [ 64.635681] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:54:37 testing simple program... [ 64.688007] cgroup: Unknown subsys name 'net' [ 64.731555] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:54:37 Registers: info registers vcpu 0 RAX=000000000000011a RBX=ffff88801812fe00 RCX=1ffff11003025f65 RDX=ffff888019f21b40 RSI=000000000000011a RDI=0000000000000000 RBP=ffff88801812fdb0 RSP=ffff88801812fbb8 R8 =0000000000000006 R9 =000000000000011a R10=000000000000011a R11=0000000000000000 R12=000000000000011a R13=ffff888018d68c98 R14=ffff88801812fdb0 R15=ffff88801812fe00 RIP=ffffffff814c0434 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 00007f39b924f700 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=00007f6b8aefb710 CR3=0000000015adc000 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=2036333a34353a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a34353a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015868001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015867a01 RSI=ffff888015867ae0 RDI=ffff888015867078 RBP=ffff888015867ae0 RSP=ffff888015866fd0 R8 =0000000000000001 R9 =ffff8880158670a8 R10=0000000000038001 R11=00000000000b3f70 R12=0000000000000008 R13=ffff888015860000 R14=ffff888015867ae0 R15=ffff888015867068 RIP=ffffffff811304ce 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 00007f05655d9900 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=00007f05655b8020 CR3=000000000f396000 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