syzkaller login: [ 31.079460] BUG: Bad rss-counter state mm:00000000570fb0bd type:MM_FILEPAGES val:33 [ 31.081452] BUG: Bad rss-counter state mm:00000000570fb0bd type:MM_ANONPAGES val:22 [ 31.254173] ================================================================== [ 31.255090] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.256049] Read of size 8 at addr ffff88800cb19a50 by task sshd/219 [ 31.256898] [ 31.257116] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.257989] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.258968] Call Trace: [ 31.259290] [ 31.259572] dump_stack_lvl+0x91/0xf0 [ 31.260073] print_report+0xcc/0x620 [ 31.260557] ? __virt_addr_valid+0x102/0x340 [ 31.261108] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.261734] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.262348] kasan_report+0xbe/0xf0 [ 31.262824] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.263452] vma_interval_tree_remove+0xc75/0xec0 [ 31.264077] vma_prepare+0xc54/0x11a0 [ 31.264550] __split_vma+0x5af/0x950 [ 31.265019] ? __pfx___split_vma+0x10/0x10 [ 31.265543] ? find_held_lock+0x2c/0x110 [ 31.266057] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.266621] ? lock_is_held_type+0x9f/0x120 [ 31.267155] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.267755] ? mtree_range_walk+0x632/0x900 [ 31.268317] ? mas_walk+0x5c7/0x7c0 [ 31.268792] do_vmi_munmap+0x1f1/0x2b0 [ 31.269286] mmap_region+0x1f9/0x2660 [ 31.269767] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.270280] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.270988] ? __pfx_lock_acquire+0x10/0x10 [ 31.271512] ? __pfx_mmap_region+0x10/0x10 [ 31.272062] ? security_mmap_addr+0x7d/0xa0 [ 31.272586] ? get_unmapped_area+0x1f5/0x3f0 [ 31.273139] do_mmap+0x854/0xf00 [ 31.273576] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.274061] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.274614] ksys_mmap_pgoff+0x3af/0x500 [ 31.275116] do_syscall_64+0x3f/0x90 [ 31.275592] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276246] RIP: 0033:0x7f96cc214d82 [ 31.276706] 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 [ 31.278817] RSP: 002b:00007fff85fa4728 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.279719] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f96cc214d82 [ 31.280568] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f96cb64e000 [ 31.281414] RBP: 00007f96cb64e000 R08: 0000000000000009 R09: 0000000000001000 [ 31.282249] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560d5ee4ef70 [ 31.283093] R13: 00007fff85fa4740 R14: 00007fff85fa4770 R15: 00007fff85fa4ad0 [ 31.283950] [ 31.284256] [ 31.284469] Allocated by task 212: [ 31.284897] kasan_save_stack+0x22/0x50 [ 31.285407] kasan_set_track+0x25/0x30 [ 31.285878] __kasan_slab_alloc+0x59/0x70 [ 31.286408] kmem_cache_alloc+0x16b/0x370 [ 31.286939] vm_area_dup+0x20/0x160 [ 31.287397] __split_vma+0x170/0x950 [ 31.287868] split_vma+0xc6/0x110 [ 31.288313] mprotect_fixup+0x8d2/0xb30 [ 31.288807] do_mprotect_pkey+0x87e/0xd40 [ 31.289317] __x64_sys_mprotect+0x78/0xc0 [ 31.289841] do_syscall_64+0x3f/0x90 [ 31.290311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290944] [ 31.291155] Freed by task 212: [ 31.291541] kasan_save_stack+0x22/0x50 [ 31.292055] kasan_set_track+0x25/0x30 [ 31.292547] kasan_save_free_info+0x2b/0x50 [ 31.293071] __kasan_slab_free+0x10a/0x190 [ 31.293602] kmem_cache_free+0x10d/0x4d0 [ 31.294103] rcu_core+0x8c8/0x2860 [ 31.294547] __do_softirq+0x1b7/0x7d4 [ 31.295021] [ 31.295239] Last potentially related work creation: [ 31.295822] kasan_save_stack+0x22/0x50 [ 31.296329] __kasan_record_aux_stack+0x8e/0xa0 [ 31.296903] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.297541] remove_vma+0x139/0x170 [ 31.297989] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.298541] do_vmi_munmap+0x1f1/0x2b0 [ 31.299026] __vm_munmap+0x138/0x3a0 [ 31.299490] __x64_sys_munmap+0x59/0x80 [ 31.299995] do_syscall_64+0x3f/0x90 [ 31.300468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.301105] [ 31.301317] The buggy address belongs to the object at ffff88800cb199f8 [ 31.301317] which belongs to the cache vm_area_struct of size 168 [ 31.302774] The buggy address is located 88 bytes inside of [ 31.302774] freed 168-byte region [ffff88800cb199f8, ffff88800cb19aa0) [ 31.304181] [ 31.304399] The buggy address belongs to the physical page: [ 31.305060] page:00000000119585c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb19 [ 31.306145] memcg:ffff8880097d1401 [ 31.306569] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.307207] page_type: 0xffffffff() [ 31.307658] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.308576] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880097d1401 [ 31.309475] page dumped because: kasan: bad access detected [ 31.310131] [ 31.310342] Memory state around the buggy address: [ 31.310921] ffff88800cb19900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.311768] ffff88800cb19980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.312641] >ffff88800cb19a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.313486] ^ [ 31.314190] ffff88800cb19a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.315044] ffff88800cb19b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.315881] ================================================================== [ 31.317010] Disabling lock debugging due to kernel taint [ 34.097637] BUG: Bad rss-counter state mm:00000000b037edfb type:MM_FILEPAGES val:33 [ 34.098807] BUG: Bad rss-counter state mm:00000000b037edfb type:MM_ANONPAGES val:22 [ 34.544898] BUG: Bad rss-counter state mm:00000000839c0988 type:MM_FILEPAGES val:33 [ 34.546298] BUG: Bad rss-counter state mm:00000000839c0988 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51489' (ECDSA) to the list of known hosts. 2023/06/20 16:15:46 fuzzer started 2023/06/20 16:15:46 dialing manager at localhost:36067 2023/06/20 16:15:46 checking machine... 2023/06/20 16:15:46 checking revisions... [ 35.285635] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:15:46 testing simple program... [ 35.332023] cgroup: Unknown subsys name 'net' [ 35.381173] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:15:46 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff8880194c82f0 RCX=ffffffff812d86ea RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff856d84a0 RBP=ffffffff856d84a0 RSP=ffff88806ce09df0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000287 R13=ffffea0000653200 R14=ffffffff813782f8 R15=ffff88800cb09700 RIP=ffffffff84535d0e RFL=00000087 [--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 00007f0594d4e900 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=00007f0594184120 CR3=000000000c6ec000 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=bf1b980f3fcc347c00000000000ae988 XMM05=ab8244e513b2361c00000000001334e0 XMM06=806171799158d96700000000001322d0 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=0000000000000004 RCX=ffffffff8113b455 RDX=1ffff11002fb1765 RSI=0000000000000004 RDI=0000000000000010 RBP=ffff888017c57f58 RSP=ffff888017c57ed0 R8 =0000000000000006 R9 =00007f18c2a800f0 R10=00007ffffffff000 R11=0000000000000000 R12=0000000000000007 R13=00007f18c2a800f0 R14=00007f18c2a800f0 R15=ffff888015d79bc0 RIP=ffffffff814c0438 RFL=00000002 [-------] 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 00007f18c1edd900 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=00007f18c2a800f0 CR3=000000000d83c000 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