syzkaller login: [ 132.137350] BUG: Bad rss-counter state mm:00000000bd4086e9 type:MM_FILEPAGES val:33 [ 132.138600] BUG: Bad rss-counter state mm:00000000bd4086e9 type:MM_ANONPAGES val:22 [ 132.176907] ================================================================== [ 132.178017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 132.179227] Read of size 8 at addr ffff888017ae94e0 by task sshd/220 [ 132.180194] [ 132.180467] CPU: 0 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 132.181732] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 132.182941] Call Trace: [ 132.183327] [ 132.183680] dump_stack_lvl+0x91/0xf0 [ 132.184280] print_report+0xcc/0x620 [ 132.184871] ? __virt_addr_valid+0x102/0x340 [ 132.185540] ? vma_interval_tree_remove+0xc75/0xec0 [ 132.186293] ? vma_interval_tree_remove+0xc75/0xec0 [ 132.187044] kasan_report+0xbe/0xf0 [ 132.187623] ? vma_interval_tree_remove+0xc75/0xec0 [ 132.188380] vma_interval_tree_remove+0xc75/0xec0 [ 132.189110] vma_prepare+0xc54/0x11a0 [ 132.189691] __split_vma+0x5af/0x950 [ 132.190260] ? __pfx___split_vma+0x10/0x10 [ 132.190906] ? find_held_lock+0x2c/0x110 [ 132.191539] do_vmi_align_munmap+0x2ba/0x11f0 [ 132.192261] ? lock_is_held_type+0x9f/0x120 [ 132.192821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 132.193398] ? mtree_range_walk+0x632/0x900 [ 132.193922] ? mas_walk+0x5c7/0x7c0 [ 132.194374] do_vmi_munmap+0x1f1/0x2b0 [ 132.194839] mmap_region+0x1f9/0x2660 [ 132.195297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 132.195798] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 132.196473] ? __pfx_lock_acquire+0x10/0x10 [ 132.196987] ? __pfx_mmap_region+0x10/0x10 [ 132.197507] ? security_mmap_addr+0x7d/0xa0 [ 132.198036] ? get_unmapped_area+0x1f5/0x3f0 [ 132.198576] do_mmap+0x854/0xf00 [ 132.199013] vm_mmap_pgoff+0x1a6/0x3a0 [ 132.199502] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 132.200074] ksys_mmap_pgoff+0x3af/0x500 [ 132.200577] do_syscall_64+0x3f/0x90 [ 132.201050] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 132.201681] RIP: 0033:0x7fe58d431d82 [ 132.202142] 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 [ 132.204272] RSP: 002b:00007ffeec9bdc38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 132.205204] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe58d431d82 [ 132.206063] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe58c86b000 [ 132.206896] RBP: 00007fe58c86b000 R08: 0000000000000009 R09: 0000000000001000 [ 132.207750] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f2bd469f70 [ 132.208599] R13: 00007ffeec9bdc50 R14: 00007ffeec9bdc80 R15: 00007ffeec9bdfe0 [ 132.209455] [ 132.209749] [ 132.209966] Allocated by task 213: [ 132.210398] kasan_save_stack+0x22/0x50 [ 132.210892] kasan_set_track+0x25/0x30 [ 132.211382] __kasan_slab_alloc+0x59/0x70 [ 132.211930] kmem_cache_alloc+0x16b/0x370 [ 132.212449] vm_area_dup+0x20/0x160 [ 132.212897] __split_vma+0x170/0x950 [ 132.213362] split_vma+0xc6/0x110 [ 132.213797] mprotect_fixup+0x8d2/0xb30 [ 132.214293] do_mprotect_pkey+0x87e/0xd40 [ 132.214810] __x64_sys_mprotect+0x78/0xc0 [ 132.215318] do_syscall_64+0x3f/0x90 [ 132.215796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 132.216433] [ 132.216648] Freed by task 213: [ 132.217040] kasan_save_stack+0x22/0x50 [ 132.217544] kasan_set_track+0x25/0x30 [ 132.218032] kasan_save_free_info+0x2b/0x50 [ 132.218551] __kasan_slab_free+0x10a/0x190 [ 132.219084] kmem_cache_free+0x10d/0x4d0 [ 132.219597] rcu_core+0x8c8/0x2860 [ 132.220029] __do_softirq+0x1b7/0x7d4 [ 132.220505] [ 132.220715] Last potentially related work creation: [ 132.221298] kasan_save_stack+0x22/0x50 [ 132.221796] __kasan_record_aux_stack+0x8e/0xa0 [ 132.222366] __call_rcu_common.constprop.0+0x6a/0xb90 [ 132.223010] remove_vma+0x139/0x170 [ 132.223461] do_vmi_align_munmap+0xd4a/0x11f0 [ 132.224044] do_vmi_munmap+0x1f1/0x2b0 [ 132.224529] __vm_munmap+0x138/0x3a0 [ 132.224989] __x64_sys_munmap+0x59/0x80 [ 132.225479] do_syscall_64+0x3f/0x90 [ 132.225947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 132.226581] [ 132.226795] The buggy address belongs to the object at ffff888017ae9488 [ 132.226795] which belongs to the cache vm_area_struct of size 168 [ 132.228270] The buggy address is located 88 bytes inside of [ 132.228270] freed 168-byte region [ffff888017ae9488, ffff888017ae9530) [ 132.229663] [ 132.229878] The buggy address belongs to the physical page: [ 132.230533] page:0000000058cc8c71 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17ae9 [ 132.231628] memcg:ffff88800e484301 [ 132.232057] flags: 0x100000000000200(slab|node=0|zone=1) [ 132.232695] page_type: 0xffffffff() [ 132.233148] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 132.234058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e484301 [ 132.234958] page dumped because: kasan: bad access detected [ 132.235633] [ 132.235848] Memory state around the buggy address: [ 132.236431] ffff888017ae9380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 132.237277] ffff888017ae9400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 132.238128] >ffff888017ae9480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 132.238980] ^ [ 132.239737] ffff888017ae9500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 132.240586] ffff888017ae9580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 132.241442] ================================================================== [ 132.242478] Disabling lock debugging due to kernel taint [ 134.111036] BUG: Bad rss-counter state mm:000000009f00b1bc type:MM_FILEPAGES val:33 [ 134.112049] BUG: Bad rss-counter state mm:000000009f00b1bc type:MM_ANONPAGES val:22 [ 134.622811] BUG: Bad rss-counter state mm:000000002307800b type:MM_FILEPAGES val:33 [ 134.623909] BUG: Bad rss-counter state mm:000000002307800b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22902' (ECDSA) to the list of known hosts. 2023/06/20 00:55:50 fuzzer started 2023/06/20 00:55:50 dialing manager at localhost:44161 2023/06/20 00:55:50 checking machine... 2023/06/20 00:55:50 checking revisions... [ 135.363793] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:55:50 testing simple program... [ 135.406945] cgroup: Unknown subsys name 'net' [ 135.454129] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:09 Registers: info registers vcpu 0 RAX=ffffffff81845c80 RBX=000000000000003d RCX=ffffffff81378270 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800ebb42e0 RBP=000000000000003e RSP=ffff88806ce09e60 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88806ce09ee8 R14=ffff88806ce35000 R15=ffff88800ebb42e0 RIP=ffffffff81845c84 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 0000000000000000 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=00007f3321678fb0 CR3=000000000cab6000 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=c7bd53f524fe7da76c45349e114a710e XMM02=00000000001371b8ec2efd57dc4c00df XMM03=000000000013b96042d62b741c930ae7 XMM04=33c712d53f3f16ef00000000000ae988 XMM05=fca904f7af4c9a7a000000000015dec0 XMM06=4fda316b135da52b000000000015cf60 XMM07=e042d86d42eb936e000000000013bbe0 XMM08=42d62b741c930ae70000000000137218 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8180c585 RBX=0000000000000001 RCX=ffffffff86137501 RDX=ffff8880192b7790 RSI=ffffffff8180c585 RDI=ffff8880192b7748 RBP=ffff8880192b77a0 RSP=ffff8880192b76d8 R8 =ffffffff8613751e R9 =ffff8880192b7788 R10=0000000000038001 R11=0000000000020d8a R12=ffff8880192b7810 R13=ffff8880192b7790 R14=ffff888015c30000 R15=ffff8880192b7748 RIP=ffffffff81130641 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 00007fc2bf80b900 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=00007ffdb66cc000 CR3=0000000009a32000 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