syzkaller login: [ 93.502805] BUG: Bad rss-counter state mm:00000000eb5d7271 type:MM_FILEPAGES val:33 [ 93.504317] BUG: Bad rss-counter state mm:00000000eb5d7271 type:MM_ANONPAGES val:22 [ 93.656348] ================================================================== [ 93.657443] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 93.658694] Read of size 8 at addr ffff88800ed8bd08 by task sshd/219 [ 93.659631] [ 93.659896] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 93.661225] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 93.662389] Call Trace: [ 93.662784] [ 93.663125] dump_stack_lvl+0x91/0xf0 [ 93.663708] print_report+0xcc/0x620 [ 93.664276] ? __virt_addr_valid+0x102/0x340 [ 93.664922] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.665678] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.666442] kasan_report+0xbe/0xf0 [ 93.667021] ? vma_interval_tree_remove+0xc75/0xec0 [ 93.667781] vma_interval_tree_remove+0xc75/0xec0 [ 93.668514] vma_prepare+0xc54/0x11a0 [ 93.669105] __split_vma+0x5af/0x950 [ 93.669683] ? __pfx___split_vma+0x10/0x10 [ 93.670326] ? find_held_lock+0x2c/0x110 [ 93.670993] do_vmi_align_munmap+0x2ba/0x11f0 [ 93.671593] ? lock_is_held_type+0x9f/0x120 [ 93.672162] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 93.672802] ? mtree_range_walk+0x632/0x900 [ 93.673387] ? mas_walk+0x5c7/0x7c0 [ 93.673892] do_vmi_munmap+0x1f1/0x2b0 [ 93.674432] mmap_region+0x1f9/0x2660 [ 93.674948] ? vm_mmap_pgoff+0x15c/0x3a0 [ 93.675501] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 93.676254] ? __pfx_lock_acquire+0x10/0x10 [ 93.676820] ? __pfx_mmap_region+0x10/0x10 [ 93.677383] ? security_mmap_addr+0x7d/0xa0 [ 93.677952] ? get_unmapped_area+0x1f5/0x3f0 [ 93.678540] do_mmap+0x854/0xf00 [ 93.679001] vm_mmap_pgoff+0x1a6/0x3a0 [ 93.679526] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 93.680128] ksys_mmap_pgoff+0x3af/0x500 [ 93.680670] do_syscall_64+0x3f/0x90 [ 93.681179] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.681860] RIP: 0033:0x7fa324cc3d82 [ 93.682346] 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 [ 93.684617] RSP: 002b:00007fff5009bb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 93.685574] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa324cc3d82 [ 93.686477] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa3240fd000 [ 93.687369] RBP: 00007fa3240fd000 R08: 0000000000000009 R09: 0000000000001000 [ 93.688263] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c85ad23ec0 [ 93.689161] R13: 00007fff5009bb80 R14: 00007fff5009bbb0 R15: 00007fff5009bf10 [ 93.690077] [ 93.690385] [ 93.690623] Allocated by task 212: [ 93.691082] kasan_save_stack+0x22/0x50 [ 93.691622] kasan_set_track+0x25/0x30 [ 93.692148] __kasan_slab_alloc+0x59/0x70 [ 93.692706] kmem_cache_alloc+0x16b/0x370 [ 93.693256] vm_area_dup+0x20/0x160 [ 93.693739] __split_vma+0x170/0x950 [ 93.694240] split_vma+0xc6/0x110 [ 93.694730] mprotect_fixup+0x8d2/0xb30 [ 93.695264] do_mprotect_pkey+0x87e/0xd40 [ 93.695822] __x64_sys_mprotect+0x78/0xc0 [ 93.696376] do_syscall_64+0x3f/0x90 [ 93.696877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.697559] [ 93.697785] Freed by task 212: [ 93.698204] kasan_save_stack+0x22/0x50 [ 93.698760] kasan_set_track+0x25/0x30 [ 93.699289] kasan_save_free_info+0x2b/0x50 [ 93.699935] __kasan_slab_free+0x10a/0x190 [ 93.700508] kmem_cache_free+0x10d/0x4d0 [ 93.701044] rcu_core+0x8c8/0x2860 [ 93.701517] __do_softirq+0x1b7/0x7d4 [ 93.702023] [ 93.702257] Last potentially related work creation: [ 93.702892] kasan_save_stack+0x22/0x50 [ 93.703436] __kasan_record_aux_stack+0x8e/0xa0 [ 93.704043] __call_rcu_common.constprop.0+0x6a/0xb90 [ 93.704725] remove_vma+0x139/0x170 [ 93.705208] do_vmi_align_munmap+0xd4a/0x11f0 [ 93.705803] do_vmi_munmap+0x1f1/0x2b0 [ 93.706318] __vm_munmap+0x138/0x3a0 [ 93.706820] __x64_sys_munmap+0x59/0x80 [ 93.707349] do_syscall_64+0x3f/0x90 [ 93.707851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 93.708538] [ 93.708765] The buggy address belongs to the object at ffff88800ed8bcb0 [ 93.708765] which belongs to the cache vm_area_struct of size 168 [ 93.710320] The buggy address is located 88 bytes inside of [ 93.710320] freed 168-byte region [ffff88800ed8bcb0, ffff88800ed8bd58) [ 93.711808] [ 93.712038] The buggy address belongs to the physical page: [ 93.712736] page:00000000f139fd68 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed8b [ 93.713893] memcg:ffff8880095e6101 [ 93.714343] flags: 0x100000000000200(slab|node=0|zone=1) [ 93.715044] page_type: 0xffffffff() [ 93.715524] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 93.716503] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095e6101 [ 93.717466] page dumped because: kasan: bad access detected [ 93.718174] [ 93.718398] Memory state around the buggy address: [ 93.719013] ffff88800ed8bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 93.719910] ffff88800ed8bc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 93.720809] >ffff88800ed8bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 93.721702] ^ [ 93.722164] ffff88800ed8bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 93.723076] ffff88800ed8be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 93.723967] ================================================================== [ 93.725034] Disabling lock debugging due to kernel taint [ 95.874662] BUG: Bad rss-counter state mm:000000004fccd953 type:MM_FILEPAGES val:33 [ 95.875835] BUG: Bad rss-counter state mm:000000004fccd953 type:MM_ANONPAGES val:22 [ 96.360212] BUG: Bad rss-counter state mm:00000000f62444fb type:MM_FILEPAGES val:33 [ 96.361437] BUG: Bad rss-counter state mm:00000000f62444fb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38264' (ECDSA) to the list of known hosts. 2023/06/19 23:48:00 fuzzer started 2023/06/19 23:48:00 dialing manager at localhost:44161 2023/06/19 23:48:00 checking machine... 2023/06/19 23:48:00 checking revisions... [ 97.052636] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:48:00 testing simple program... [ 97.095324] cgroup: Unknown subsys name 'net' [ 97.133412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:47:05 Registers: info registers vcpu 0 RAX=1ffffffff0bbf8d5 RBX=ffffffff85dfc6ac RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff88801466f920 R8 =ffffffff86137004 R9 =ffff88801466fa18 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6b4 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----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 00007fbd681c6900 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=00007fbd676eb000 CR3=000000000c758000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=e11bde55e9295b0100000000000ae988 XMM05=97f63919d167852b0000000000139f08 XMM06=19e9129bd510f2350000000000138da0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864a8758 RDX=1ffff1100206ce13 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff8880103670a8 RSP=ffff888010366fe0 R8 =ffffffff864a875c R9 =ffff888010367090 R10=0000000000038001 R11=00000000000b3b3c R12=ffff8880103670b0 R13=ffff888010367098 R14=0000000000000005 R15=ffff888010367050 RIP=ffffffff81130b54 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 00007f6353c8c900 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=00007f6353c51008 CR3=000000000c6d2000 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