syzkaller login: [ 36.847505] BUG: Bad rss-counter state mm:000000001b0c286d type:MM_FILEPAGES val:33 [ 36.848707] BUG: Bad rss-counter state mm:000000001b0c286d type:MM_ANONPAGES val:22 [ 36.893556] ================================================================== [ 36.894592] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.895774] Read of size 8 at addr ffff888019ae8df0 by task sshd/219 [ 36.896638] [ 36.896883] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.897846] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.898934] Call Trace: [ 36.899286] [ 36.899600] dump_stack_lvl+0x91/0xf0 [ 36.900161] print_report+0xcc/0x620 [ 36.900695] ? __virt_addr_valid+0x102/0x340 [ 36.901317] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.902004] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.902683] kasan_report+0xbe/0xf0 [ 36.903233] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.903970] vma_interval_tree_remove+0xc75/0xec0 [ 36.904677] vma_prepare+0xc54/0x11a0 [ 36.905237] __split_vma+0x5af/0x950 [ 36.905788] ? __pfx___split_vma+0x10/0x10 [ 36.906403] ? find_held_lock+0x2c/0x110 [ 36.907005] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.907664] ? lock_is_held_type+0x9f/0x120 [ 36.908292] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.908991] ? mtree_range_walk+0x632/0x900 [ 36.909633] ? mas_walk+0x5c7/0x7c0 [ 36.910183] do_vmi_munmap+0x1f1/0x2b0 [ 36.910757] mmap_region+0x1f9/0x2660 [ 36.911314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.911920] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.912755] ? __pfx_lock_acquire+0x10/0x10 [ 36.913376] ? __pfx_mmap_region+0x10/0x10 [ 36.913997] ? security_mmap_addr+0x7d/0xa0 [ 36.914624] ? get_unmapped_area+0x1f5/0x3f0 [ 36.915255] do_mmap+0x854/0xf00 [ 36.915761] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.916355] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.916999] ? ksys_mmap_pgoff+0x3bc/0x500 [ 36.917608] ksys_mmap_pgoff+0x3af/0x500 [ 36.918193] do_syscall_64+0x3f/0x90 [ 36.918754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.919507] RIP: 0033:0x7f654b432d82 [ 36.920045] 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 [ 36.922518] RSP: 002b:00007ffe81443418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.923579] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f654b432d82 [ 36.924597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f654a86c000 [ 36.925587] RBP: 00007f654a86c000 R08: 0000000000000009 R09: 0000000000001000 [ 36.926577] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ba114d3b20 [ 36.927569] R13: 00007ffe81443430 R14: 00007ffe81443460 R15: 00007ffe814437c0 [ 36.928541] [ 36.928868] [ 36.929106] Allocated by task 212: [ 36.929581] kasan_save_stack+0x22/0x50 [ 36.930142] kasan_set_track+0x25/0x30 [ 36.930689] __kasan_slab_alloc+0x59/0x70 [ 36.931266] kmem_cache_alloc+0x16b/0x370 [ 36.931853] vm_area_dup+0x20/0x160 [ 36.932364] __split_vma+0x170/0x950 [ 36.932882] split_vma+0xc6/0x110 [ 36.933372] mprotect_fixup+0x8d2/0xb30 [ 36.933931] do_mprotect_pkey+0x87e/0xd40 [ 36.934509] __x64_sys_mprotect+0x78/0xc0 [ 36.935082] do_syscall_64+0x3f/0x90 [ 36.935621] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.936345] [ 36.936583] Freed by task 212: [ 36.937017] kasan_save_stack+0x22/0x50 [ 36.937579] kasan_set_track+0x25/0x30 [ 36.938122] kasan_save_free_info+0x2b/0x50 [ 36.938722] __kasan_slab_free+0x10a/0x190 [ 36.939315] kmem_cache_free+0x10d/0x4d0 [ 36.939886] rcu_core+0x8c8/0x2860 [ 36.940378] __do_softirq+0x1b7/0x7d4 [ 36.940907] [ 36.941149] Last potentially related work creation: [ 36.941800] kasan_save_stack+0x22/0x50 [ 36.942360] __kasan_record_aux_stack+0x8e/0xa0 [ 36.943004] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.943713] remove_vma+0x139/0x170 [ 36.944235] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.944851] do_vmi_munmap+0x1f1/0x2b0 [ 36.945387] __vm_munmap+0x138/0x3a0 [ 36.945903] __x64_sys_munmap+0x59/0x80 [ 36.946458] do_syscall_64+0x3f/0x90 [ 36.946987] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.947696] [ 36.947949] The buggy address belongs to the object at ffff888019ae8d98 [ 36.947949] which belongs to the cache vm_area_struct of size 168 [ 36.949579] The buggy address is located 88 bytes inside of [ 36.949579] freed 168-byte region [ffff888019ae8d98, ffff888019ae8e40) [ 36.951126] [ 36.951369] The buggy address belongs to the physical page: [ 36.952110] page:000000002363716e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ae8 [ 36.953331] memcg:ffff888016b4c201 [ 36.953805] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.954525] page_type: 0xffffffff() [ 36.955026] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.956049] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016b4c201 [ 36.957047] page dumped because: kasan: bad access detected [ 36.957783] [ 36.958024] Memory state around the buggy address: [ 36.958666] ffff888019ae8c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.959616] ffff888019ae8d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.960571] >ffff888019ae8d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.961524] ^ [ 36.962422] ffff888019ae8e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.963373] ffff888019ae8e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.964339] ================================================================== [ 36.965421] Disabling lock debugging due to kernel taint [ 39.010298] BUG: Bad rss-counter state mm:000000009dd43646 type:MM_FILEPAGES val:33 [ 39.011611] BUG: Bad rss-counter state mm:000000009dd43646 type:MM_ANONPAGES val:22 [ 39.505446] BUG: Bad rss-counter state mm:0000000028221ac1 type:MM_FILEPAGES val:33 [ 39.506494] BUG: Bad rss-counter state mm:0000000028221ac1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33463' (ECDSA) to the list of known hosts. 2023/06/20 00:25:05 fuzzer started 2023/06/20 00:25:05 dialing manager at localhost:44161 2023/06/20 00:25:05 checking machine... 2023/06/20 00:25:05 checking revisions... [ 40.293042] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:25:05 testing simple program... [ 40.341807] cgroup: Unknown subsys name 'net' [ 40.390341] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:24:59 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000001000 RCX=0000000000000000 RDX=ffff88800903b680 RSI=ffffffff820082c2 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880090df158 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000001000 R11=0000000000009293 R12=ffff88800ba25a01 R13=ffffea000071bac0 R14=00000000ffffffff R15=ffff88801bc402b8 RIP=ffffffff814c07f1 RFL=00000206 [-----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=00007f56689cf000 CR3=000000000e474000 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=0064695f65706f63735f366e69730065 XMM02=646e6d79535f666c45006b747368735f XMM03=5f79656b5f646165726874705f666f65 XMM04=6b636f7300746e6576655f7473616c5f XMM05=5f00736e6f69737265765f6c006c6563 XMM06=5f646165726874705f5f0074726f705f XMM07=725f6c616974696e695f6c74706e5f5f XMM08=01000000000000000000000000000001 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=ffffffff81378270 RDX=1ffff11001aed348 RSI=0000000000000000 RDI=ffff88800844f780 RBP=dead000000000122 RSP=ffff88806cf09e18 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=dead000000000100 R13=ffff88800d769a00 R14=ffff88800d769980 R15=dffffc0000000000 RIP=ffffffff81845e42 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5668a3a900 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=00007f56689e9008 CR3=000000000e474000 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