syzkaller login: [ 38.831673] BUG: Bad rss-counter state mm:000000001b735971 type:MM_FILEPAGES val:33 [ 38.832915] BUG: Bad rss-counter state mm:000000001b735971 type:MM_ANONPAGES val:22 [ 38.872850] ================================================================== [ 38.873897] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.874846] Read of size 8 at addr ffff88800dd12c20 by task sshd/220 [ 38.875706] [ 38.875945] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.876860] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.877831] Call Trace: [ 38.878157] [ 38.878450] dump_stack_lvl+0x91/0xf0 [ 38.878945] print_report+0xcc/0x620 [ 38.879441] ? __virt_addr_valid+0x102/0x340 [ 38.880020] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.880664] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.881347] kasan_report+0xbe/0xf0 [ 38.881825] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.882467] vma_interval_tree_remove+0xc75/0xec0 [ 38.883123] vma_prepare+0xc54/0x11a0 [ 38.883617] __split_vma+0x5af/0x950 [ 38.884125] ? __pfx___split_vma+0x10/0x10 [ 38.884685] ? find_held_lock+0x2c/0x110 [ 38.885206] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.885773] ? lock_is_held_type+0x9f/0x120 [ 38.886372] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.886988] ? mtree_range_walk+0x632/0x900 [ 38.887543] ? mas_walk+0x5c7/0x7c0 [ 38.888048] do_vmi_munmap+0x1f1/0x2b0 [ 38.888571] mmap_region+0x1f9/0x2660 [ 38.889090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.889646] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.890383] ? __pfx_lock_acquire+0x10/0x10 [ 38.890919] ? __pfx_mmap_region+0x10/0x10 [ 38.891450] ? security_mmap_addr+0x7d/0xa0 [ 38.891991] ? get_unmapped_area+0x1f5/0x3f0 [ 38.892563] do_mmap+0x854/0xf00 [ 38.893021] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.893567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.894129] ksys_mmap_pgoff+0x3af/0x500 [ 38.894661] do_syscall_64+0x3f/0x90 [ 38.895187] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.895826] RIP: 0033:0x7f722ac39d82 [ 38.896346] 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 [ 38.898692] RSP: 002b:00007ffebdb3e118 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.899669] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f722ac39d82 [ 38.900535] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f722a073000 [ 38.901422] RBP: 00007f722a073000 R08: 0000000000000009 R09: 0000000000001000 [ 38.902340] R10: 0000000000000812 R11: 0000000000000206 R12: 00005646a3221ec0 [ 38.903186] R13: 00007ffebdb3e130 R14: 00007ffebdb3e160 R15: 00007ffebdb3e4c0 [ 38.904069] [ 38.904384] [ 38.904602] Allocated by task 213: [ 38.905066] kasan_save_stack+0x22/0x50 [ 38.905618] kasan_set_track+0x25/0x30 [ 38.906121] __kasan_slab_alloc+0x59/0x70 [ 38.906666] kmem_cache_alloc+0x16b/0x370 [ 38.907184] vm_area_dup+0x20/0x160 [ 38.907639] __split_vma+0x170/0x950 [ 38.908150] split_vma+0xc6/0x110 [ 38.908604] mprotect_fixup+0x8d2/0xb30 [ 38.909134] do_mprotect_pkey+0x87e/0xd40 [ 38.909688] __x64_sys_mprotect+0x78/0xc0 [ 38.910214] do_syscall_64+0x3f/0x90 [ 38.910713] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.911395] [ 38.911614] Freed by task 213: [ 38.912025] kasan_save_stack+0x22/0x50 [ 38.912576] kasan_set_track+0x25/0x30 [ 38.913068] kasan_save_free_info+0x2b/0x50 [ 38.913610] __kasan_slab_free+0x10a/0x190 [ 38.914186] kmem_cache_free+0x10d/0x4d0 [ 38.914711] rcu_core+0x8c8/0x2860 [ 38.915198] __do_softirq+0x1b7/0x7d4 [ 38.915699] [ 38.915915] Last potentially related work creation: [ 38.916498] kasan_save_stack+0x22/0x50 [ 38.917006] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917573] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918262] remove_vma+0x139/0x170 [ 38.918711] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.919337] do_vmi_munmap+0x1f1/0x2b0 [ 38.919819] __vm_munmap+0x138/0x3a0 [ 38.920285] __x64_sys_munmap+0x59/0x80 [ 38.920776] do_syscall_64+0x3f/0x90 [ 38.921271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.921912] [ 38.922159] The buggy address belongs to the object at ffff88800dd12bc8 [ 38.922159] which belongs to the cache vm_area_struct of size 168 [ 38.923670] The buggy address is located 88 bytes inside of [ 38.923670] freed 168-byte region [ffff88800dd12bc8, ffff88800dd12c70) [ 38.925162] [ 38.925411] The buggy address belongs to the physical page: [ 38.926082] page:00000000709a6d89 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd12 [ 38.927196] memcg:ffff88800e272401 [ 38.927620] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.928327] page_type: 0xffffffff() [ 38.928774] raw: 0100000000000200 ffff8880087a0c80 ffffea0000395700 dead000000000005 [ 38.929773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e272401 [ 38.930774] page dumped because: kasan: bad access detected [ 38.931447] [ 38.931660] Memory state around the buggy address: [ 38.932245] ffff88800dd12b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.933138] ffff88800dd12b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.934023] >ffff88800dd12c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.934959] ^ [ 38.935489] ffff88800dd12c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 38.936347] ffff88800dd12d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 38.937207] ================================================================== [ 38.938396] Disabling lock debugging due to kernel taint [ 40.895104] BUG: Bad rss-counter state mm:0000000028020b36 type:MM_FILEPAGES val:33 [ 40.896298] BUG: Bad rss-counter state mm:0000000028020b36 type:MM_ANONPAGES val:22 [ 41.283558] BUG: Bad rss-counter state mm:0000000048eac19c type:MM_FILEPAGES val:33 [ 41.284893] BUG: Bad rss-counter state mm:0000000048eac19c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61449' (ECDSA) to the list of known hosts. 2023/06/20 22:50:24 fuzzer started 2023/06/20 22:50:24 dialing manager at localhost:36067 2023/06/20 22:50:24 checking machine... 2023/06/20 22:50:24 checking revisions... [ 41.913742] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:50:24 testing simple program... [ 41.952637] cgroup: Unknown subsys name 'net' [ 41.989573] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:50:24 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007fec234aa000 CR3=000000000cb00000 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=21ceb84a8cc723a39e4de7e2f8414b17 XMM02=ec2efd57dc4c00df000000000011b1f8 XMM03=79a60d96a4caef59000000000011b2c8 XMM04=67fdec0d2f75be3600000000000ae988 XMM05=19e9129bd510f2350000000000131708 XMM06=80dc51593ba89a3700000000001308e0 XMM07=e042d86d42eb936e0000000000121ee0 XMM08=79a60d96a4caef59000000000011b2c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000038 RCX=0000000000000000 RDX=ffff88800e8e8000 RSI=ffffffff844a4f30 RDI=0000000000000005 RBP=ffff88800c590050 RSP=ffff888019fdfce0 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000003 R11=0000000000000000 R12=0000000000000007 R13=0000000000000008 R14=00007f77174f5000 R15=00007f771755dfff RIP=ffffffff814c089b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f77169be900 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=00007f771752f3ec CR3=000000000ce14000 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