syzkaller login: [ 31.037617] BUG: Bad rss-counter state mm:00000000c4708bbc type:MM_FILEPAGES val:33 [ 31.039303] BUG: Bad rss-counter state mm:00000000c4708bbc type:MM_ANONPAGES val:22 [ 31.205146] ================================================================== [ 31.206237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.207188] Read of size 8 at addr ffff88801bc21d08 by task sshd/220 [ 31.208060] [ 31.208281] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.209160] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.210163] Call Trace: [ 31.210487] [ 31.210771] dump_stack_lvl+0x91/0xf0 [ 31.211267] print_report+0xcc/0x620 [ 31.211750] ? __virt_addr_valid+0x102/0x340 [ 31.212311] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.212931] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213557] kasan_report+0xbe/0xf0 [ 31.214043] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214655] vma_interval_tree_remove+0xc75/0xec0 [ 31.215262] vma_prepare+0xc54/0x11a0 [ 31.215745] __split_vma+0x5af/0x950 [ 31.216227] ? __pfx___split_vma+0x10/0x10 [ 31.216753] ? find_held_lock+0x2c/0x110 [ 31.217281] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.217875] ? lock_is_held_type+0x9f/0x120 [ 31.218423] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.219033] ? mtree_range_walk+0x632/0x900 [ 31.219598] ? mas_walk+0x5c7/0x7c0 [ 31.220072] do_vmi_munmap+0x1f1/0x2b0 [ 31.220569] mmap_region+0x1f9/0x2660 [ 31.221050] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.221562] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.222291] ? __pfx_lock_acquire+0x10/0x10 [ 31.222823] ? __pfx_mmap_region+0x10/0x10 [ 31.223351] ? security_mmap_addr+0x7d/0xa0 [ 31.223881] ? get_unmapped_area+0x1f5/0x3f0 [ 31.224433] do_mmap+0x854/0xf00 [ 31.224874] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.225367] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.225947] ksys_mmap_pgoff+0x3af/0x500 [ 31.226454] do_syscall_64+0x3f/0x90 [ 31.226939] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.227585] RIP: 0033:0x7f80f9633d82 [ 31.228043] 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 [ 31.230186] RSP: 002b:00007fff28abb968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.231096] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f80f9633d82 [ 31.231947] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f80f8a6d000 [ 31.232798] RBP: 00007f80f8a6d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.233652] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6ae549ec0 [ 31.234505] R13: 00007fff28abb980 R14: 00007fff28abb9b0 R15: 00007fff28abbd10 [ 31.235374] [ 31.235667] [ 31.235888] Allocated by task 213: [ 31.236310] kasan_save_stack+0x22/0x50 [ 31.236818] kasan_set_track+0x25/0x30 [ 31.237312] __kasan_slab_alloc+0x59/0x70 [ 31.237848] kmem_cache_alloc+0x16b/0x370 [ 31.238368] vm_area_dup+0x20/0x160 [ 31.238818] __split_vma+0x170/0x950 [ 31.239280] split_vma+0xc6/0x110 [ 31.239722] mprotect_fixup+0x8d2/0xb30 [ 31.240224] do_mprotect_pkey+0x87e/0xd40 [ 31.240744] __x64_sys_mprotect+0x78/0xc0 [ 31.241269] do_syscall_64+0x3f/0x90 [ 31.241765] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.242404] [ 31.242622] Freed by task 203: [ 31.243014] kasan_save_stack+0x22/0x50 [ 31.243516] kasan_set_track+0x25/0x30 [ 31.244015] kasan_save_free_info+0x2b/0x50 [ 31.244545] __kasan_slab_free+0x10a/0x190 [ 31.245081] kmem_cache_free+0x10d/0x4d0 [ 31.245592] rcu_core+0x8c8/0x2860 [ 31.246048] __do_softirq+0x1b7/0x7d4 [ 31.246539] [ 31.246759] Last potentially related work creation: [ 31.247341] kasan_save_stack+0x22/0x50 [ 31.247840] __kasan_record_aux_stack+0x8e/0xa0 [ 31.248414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.249056] remove_vma+0x139/0x170 [ 31.249516] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.250098] do_vmi_munmap+0x1f1/0x2b0 [ 31.250584] __vm_munmap+0x138/0x3a0 [ 31.251046] __x64_sys_munmap+0x59/0x80 [ 31.251542] do_syscall_64+0x3f/0x90 [ 31.252017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.252661] [ 31.252878] The buggy address belongs to the object at ffff88801bc21cb0 [ 31.252878] which belongs to the cache vm_area_struct of size 168 [ 31.254345] The buggy address is located 88 bytes inside of [ 31.254345] freed 168-byte region [ffff88801bc21cb0, ffff88801bc21d58) [ 31.255760] [ 31.255972] The buggy address belongs to the physical page: [ 31.256644] page:00000000503fb186 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1bc21 [ 31.257763] memcg:ffff888019f67501 [ 31.258196] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.258849] page_type: 0xffffffff() [ 31.259301] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.260241] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f67501 [ 31.261167] page dumped because: kasan: bad access detected [ 31.261850] [ 31.262068] Memory state around the buggy address: [ 31.262656] ffff88801bc21c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.263528] ffff88801bc21c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.264390] >ffff88801bc21d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.265248] ^ [ 31.265685] ffff88801bc21d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.266568] ffff88801bc21e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.267413] ================================================================== [ 31.268380] Disabling lock debugging due to kernel taint [ 32.720227] BUG: Bad rss-counter state mm:00000000d77b3449 type:MM_FILEPAGES val:33 [ 32.722019] BUG: Bad rss-counter state mm:00000000d77b3449 type:MM_ANONPAGES val:22 [ 33.089648] BUG: Bad rss-counter state mm:00000000e6532c9d type:MM_FILEPAGES val:33 [ 33.090283] BUG: Bad rss-counter state mm:00000000e6532c9d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49018' (ECDSA) to the list of known hosts. 2023/06/21 06:35:52 fuzzer started 2023/06/21 06:35:52 dialing manager at localhost:36067 2023/06/21 06:35:52 checking machine... 2023/06/21 06:35:52 checking revisions... [ 33.738295] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:35:52 testing simple program... [ 33.781028] cgroup: Unknown subsys name 'net' [ 33.822863] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:35:52 Registers: info registers vcpu 0 RAX=0000000000038000 RBX=0000000000000001 RCX=ffffffff844bfc26 RDX=dffffc0000000000 RSI=0000000000034bfc RDI=ffff88800cb96cd8 RBP=ffff88800cb96d30 RSP=ffff88800cb96c68 R8 =0000000000000001 R9 =ffff88800cb96d18 R10=0000000000038001 R11=00000000000b3b7c R12=ffff88800cb96d38 R13=ffff88800cb96d20 R14=ffff88800cb96d19 R15=ffff88800cb96cd8 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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 00007fc078f2f900 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=00007fc078ee8008 CR3=000000000f802000 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=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 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09a78 RCX=0000000000000002 RDX=1ffff1100d9e1350 RSI=ffff88806cf09e08 RDI=ffff88806cf09a80 RBP=ffff88806cf09e08 RSP=ffff88806cf099d0 R8 =ffffffff86138f56 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020db7 R12=0000000000000008 R13=ffff88806cf09ac0 R14=ffff88806cf09e10 R15=ffff88806cf09a78 RIP=ffffffff81130445 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 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=00007f58397342c0 CR3=00000000193ee000 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=2031353a35333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a35333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000