syzkaller login: [ 31.743317] BUG: Bad rss-counter state mm:000000003e9209d4 type:MM_FILEPAGES val:33 [ 31.744494] BUG: Bad rss-counter state mm:000000003e9209d4 type:MM_ANONPAGES val:22 [ 31.781160] ================================================================== [ 31.782104] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.783110] Read of size 8 at addr ffff88801838dd08 by task sshd/219 [ 31.783866] [ 31.784084] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.784936] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.785902] Call Trace: [ 31.786220] [ 31.786497] dump_stack_lvl+0x91/0xf0 [ 31.786976] print_report+0xcc/0x620 [ 31.787452] ? __virt_addr_valid+0x102/0x340 [ 31.788002] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.788606] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.789220] kasan_report+0xbe/0xf0 [ 31.789691] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.790304] vma_interval_tree_remove+0xc75/0xec0 [ 31.790910] vma_prepare+0xc54/0x11a0 [ 31.791400] __split_vma+0x5af/0x950 [ 31.791891] ? __pfx___split_vma+0x10/0x10 [ 31.792439] ? find_held_lock+0x2c/0x110 [ 31.792982] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.793580] ? lock_is_held_type+0x9f/0x120 [ 31.794134] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.794767] ? mtree_range_walk+0x632/0x900 [ 31.795336] ? mas_walk+0x5c7/0x7c0 [ 31.795824] do_vmi_munmap+0x1f1/0x2b0 [ 31.796327] mmap_region+0x1f9/0x2660 [ 31.796822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.797358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.798101] ? __pfx_lock_acquire+0x10/0x10 [ 31.798649] ? __pfx_mmap_region+0x10/0x10 [ 31.799203] ? security_mmap_addr+0x7d/0xa0 [ 31.799757] ? get_unmapped_area+0x1f5/0x3f0 [ 31.800330] do_mmap+0x854/0xf00 [ 31.800782] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.801301] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.801884] ksys_mmap_pgoff+0x3af/0x500 [ 31.802407] do_syscall_64+0x3f/0x90 [ 31.802901] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.803565] RIP: 0033:0x7f4f59a98d82 [ 31.804033] 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 [ 31.806255] RSP: 002b:00007ffea3fc5518 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.807189] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4f59a98d82 [ 31.808074] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4f58ed2000 [ 31.808952] RBP: 00007f4f58ed2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.809835] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd948d4ec0 [ 31.810705] R13: 00007ffea3fc5530 R14: 00007ffea3fc5560 R15: 00007ffea3fc58c0 [ 31.811583] [ 31.811886] [ 31.812107] Allocated by task 212: [ 31.812548] kasan_save_stack+0x22/0x50 [ 31.813072] kasan_set_track+0x25/0x30 [ 31.813582] __kasan_slab_alloc+0x59/0x70 [ 31.814131] kmem_cache_alloc+0x16b/0x370 [ 31.814669] vm_area_dup+0x20/0x160 [ 31.815139] __split_vma+0x170/0x950 [ 31.815633] split_vma+0xc6/0x110 [ 31.816090] mprotect_fixup+0x8d2/0xb30 [ 31.816610] do_mprotect_pkey+0x87e/0xd40 [ 31.817145] __x64_sys_mprotect+0x78/0xc0 [ 31.817699] do_syscall_64+0x3f/0x90 [ 31.818188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.818849] [ 31.819076] Freed by task 212: [ 31.819478] kasan_save_stack+0x22/0x50 [ 31.820000] kasan_set_track+0x25/0x30 [ 31.820516] kasan_save_free_info+0x2b/0x50 [ 31.821069] __kasan_slab_free+0x10a/0x190 [ 31.821628] kmem_cache_free+0x10d/0x4d0 [ 31.822157] rcu_core+0x8c8/0x2860 [ 31.822613] __do_softirq+0x1b7/0x7d4 [ 31.823114] [ 31.823337] Last potentially related work creation: [ 31.823946] kasan_save_stack+0x22/0x50 [ 31.824475] __kasan_record_aux_stack+0x8e/0xa0 [ 31.825075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.825738] remove_vma+0x139/0x170 [ 31.826203] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.826785] do_vmi_munmap+0x1f1/0x2b0 [ 31.827293] __vm_munmap+0x138/0x3a0 [ 31.827781] __x64_sys_munmap+0x59/0x80 [ 31.828298] do_syscall_64+0x3f/0x90 [ 31.828791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.829468] [ 31.829696] The buggy address belongs to the object at ffff88801838dcb0 [ 31.829696] which belongs to the cache vm_area_struct of size 168 [ 31.831224] The buggy address is located 88 bytes inside of [ 31.831224] freed 168-byte region [ffff88801838dcb0, ffff88801838dd58) [ 31.832684] [ 31.832915] The buggy address belongs to the physical page: [ 31.833607] page:0000000035c8f224 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1838d [ 31.834740] memcg:ffff888016af7401 [ 31.835179] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.835839] page_type: 0xffffffff() [ 31.836304] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.837276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016af7401 [ 31.838216] page dumped because: kasan: bad access detected [ 31.838902] [ 31.839124] Memory state around the buggy address: [ 31.839723] ffff88801838dc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 31.840606] ffff88801838dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.841503] >ffff88801838dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.842384] ^ [ 31.842841] ffff88801838dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.843729] ffff88801838de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.844607] ================================================================== [ 31.845749] Disabling lock debugging due to kernel taint [ 34.640314] BUG: Bad rss-counter state mm:00000000f3ff46c1 type:MM_FILEPAGES val:33 [ 34.641308] BUG: Bad rss-counter state mm:00000000f3ff46c1 type:MM_ANONPAGES val:22 [ 35.094780] BUG: Bad rss-counter state mm:00000000ba60668d type:MM_FILEPAGES val:33 [ 35.095730] BUG: Bad rss-counter state mm:00000000ba60668d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35031' (ECDSA) to the list of known hosts. 2023/06/19 20:25:48 fuzzer started 2023/06/19 20:25:48 dialing manager at localhost:44161 2023/06/19 20:25:48 checking machine... 2023/06/19 20:25:48 checking revisions... [ 35.812294] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:25:49 testing simple program... [ 35.856163] cgroup: Unknown subsys name 'net' [ 35.893921] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:25:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000607f92e0b7e8 RCX=0000000000000000 RDX=ffff888015810000 RSI=ffffffff8164d092 RDI=0000000000000007 RBP=ffff88801640a4c0 RSP=ffff88801580fb40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6c88 R12=0000000000000000 R13=0000000000000000 R14=ffff88801640a000 R15=00000000000000b5 RIP=ffffffff814c07e4 RFL=00000203 [------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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007ff5d58fd900 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=00007ff5d4d423b0 CR3=000000000eb8a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=54b600c4ba1167ff00000000000ae988 XMM05=0161fca8299947db0000000000134e08 XMM06=e33ca02aff2c55330000000000133ba8 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=ffff8880191fc8d0 RCX=0000000000000000 RDX=1ffffffff09a5f41 RSI=ffffffff8217c88a RDI=ffffffff84d2fa08 RBP=ffff888016bffd88 RSP=ffff888016bffd48 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800e96f180 R13=ffff888016bffde0 R14=ffffffff84d2fa00 R15=ffff888008f92000 RIP=ffffffff8186cf45 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 00007fbf79967900 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=00007ffd182b3000 CR3=000000000effe000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000