syzkaller login: [ 68.695694] BUG: Bad rss-counter state mm:0000000009de78ee type:MM_FILEPAGES val:33 [ 68.697216] BUG: Bad rss-counter state mm:0000000009de78ee type:MM_ANONPAGES val:22 [ 68.847972] ================================================================== [ 68.849112] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.850227] Read of size 8 at addr ffff88800fd716b0 by task sshd/228 [ 68.851046] [ 68.851276] CPU: 1 PID: 228 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.852226] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.853267] Call Trace: [ 68.853607] [ 68.853914] dump_stack_lvl+0x91/0xf0 [ 68.854439] print_report+0xcc/0x620 [ 68.854959] ? __virt_addr_valid+0x102/0x340 [ 68.855549] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.856236] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.856897] kasan_report+0xbe/0xf0 [ 68.857410] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.858070] vma_interval_tree_remove+0xc75/0xec0 [ 68.858716] vma_prepare+0xc54/0x11a0 [ 68.859229] __split_vma+0x5af/0x950 [ 68.859734] ? __pfx___split_vma+0x10/0x10 [ 68.860312] ? find_held_lock+0x2c/0x110 [ 68.860870] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.861483] ? lock_is_held_type+0x9f/0x120 [ 68.862063] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.862718] ? mtree_range_walk+0x632/0x900 [ 68.863293] ? mas_walk+0x5c7/0x7c0 [ 68.863770] do_vmi_munmap+0x1f1/0x2b0 [ 68.864307] mmap_region+0x1f9/0x2660 [ 68.864825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.865379] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.866147] ? __pfx_lock_acquire+0x10/0x10 [ 68.866726] ? __pfx_mmap_region+0x10/0x10 [ 68.867296] ? security_mmap_addr+0x7d/0xa0 [ 68.867886] ? get_unmapped_area+0x1f5/0x3f0 [ 68.868461] do_mmap+0x854/0xf00 [ 68.868911] vm_mmap_pgoff+0x1a6/0x3a0 [ 68.869455] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 68.870069] ksys_mmap_pgoff+0x3af/0x500 [ 68.870626] do_syscall_64+0x3f/0x90 [ 68.871151] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.871863] RIP: 0033:0x7fe0a2c27d82 [ 68.872367] 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 [ 68.874646] RSP: 002b:00007ffd9c9a5418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 68.875618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe0a2c27d82 [ 68.876558] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe0a2061000 [ 68.877481] RBP: 00007fe0a2061000 R08: 0000000000000009 R09: 0000000000001000 [ 68.878374] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e03841f70 [ 68.879260] R13: 00007ffd9c9a5430 R14: 00007ffd9c9a5460 R15: 00007ffd9c9a57c0 [ 68.880217] [ 68.880537] [ 68.880775] Allocated by task 221: [ 68.881241] kasan_save_stack+0x22/0x50 [ 68.881790] kasan_set_track+0x25/0x30 [ 68.882307] __kasan_slab_alloc+0x59/0x70 [ 68.882863] kmem_cache_alloc+0x16b/0x370 [ 68.883433] vm_area_dup+0x20/0x160 [ 68.883928] __split_vma+0x170/0x950 [ 68.884434] split_vma+0xc6/0x110 [ 68.884911] mprotect_fixup+0x8d2/0xb30 [ 68.885449] do_mprotect_pkey+0x87e/0xd40 [ 68.886016] __x64_sys_mprotect+0x78/0xc0 [ 68.886587] do_syscall_64+0x3f/0x90 [ 68.887104] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.887805] [ 68.888053] Freed by task 221: [ 68.888480] kasan_save_stack+0x22/0x50 [ 68.889047] kasan_set_track+0x25/0x30 [ 68.889593] kasan_save_free_info+0x2b/0x50 [ 68.890169] __kasan_slab_free+0x10a/0x190 [ 68.890742] kmem_cache_free+0x10d/0x4d0 [ 68.891357] rcu_core+0x8c8/0x2860 [ 68.891866] __do_softirq+0x1b7/0x7d4 [ 68.892393] [ 68.892639] Last potentially related work creation: [ 68.893297] kasan_save_stack+0x22/0x50 [ 68.893859] __kasan_record_aux_stack+0x8e/0xa0 [ 68.894503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 68.895224] remove_vma+0x139/0x170 [ 68.895686] do_vmi_align_munmap+0xd4a/0x11f0 [ 68.896317] do_vmi_munmap+0x1f1/0x2b0 [ 68.896864] __vm_munmap+0x138/0x3a0 [ 68.897416] __x64_sys_munmap+0x59/0x80 [ 68.897977] do_syscall_64+0x3f/0x90 [ 68.898511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 68.899216] [ 68.899436] The buggy address belongs to the object at ffff88800fd71658 [ 68.899436] which belongs to the cache vm_area_struct of size 168 [ 68.901055] The buggy address is located 88 bytes inside of [ 68.901055] freed 168-byte region [ffff88800fd71658, ffff88800fd71700) [ 68.902573] [ 68.902790] The buggy address belongs to the physical page: [ 68.903532] page:000000009505447d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd71 [ 68.904775] memcg:ffff88801616dc01 [ 68.905257] flags: 0x100000000000200(slab|node=0|zone=1) [ 68.905988] page_type: 0xffffffff() [ 68.906451] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 68.907452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801616dc01 [ 68.908499] page dumped because: kasan: bad access detected [ 68.909253] [ 68.909497] Memory state around the buggy address: [ 68.910146] ffff88800fd71580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 68.911021] ffff88800fd71600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 68.912009] >ffff88800fd71680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 68.912995] ^ [ 68.913667] ffff88800fd71700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 68.914582] ffff88800fd71780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 68.915496] ================================================================== [ 68.916559] Disabling lock debugging due to kernel taint [ 70.764438] BUG: Bad rss-counter state mm:00000000c82dec3f type:MM_FILEPAGES val:33 [ 70.765136] BUG: Bad rss-counter state mm:00000000c82dec3f type:MM_ANONPAGES val:22 [ 71.262350] BUG: Bad rss-counter state mm:0000000075b9ff0a type:MM_FILEPAGES val:33 [ 71.263419] BUG: Bad rss-counter state mm:0000000075b9ff0a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20188' (ECDSA) to the list of known hosts. 2023/06/20 19:36:38 fuzzer started 2023/06/20 19:36:38 dialing manager at localhost:36067 2023/06/20 19:36:38 checking machine... 2023/06/20 19:36:38 checking revisions... [ 71.981637] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:36:38 testing simple program... [ 72.037652] cgroup: Unknown subsys name 'net' [ 72.110203] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:36:38 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff844a4e3e RDX=ffff88800c4a1b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffffffff84e39980 RSP=ffff8880163f7cb0 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000005 R14=0000000000000003 R15=00005574e4b2efff RIP=ffffffff814c027c 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 00007f8d520cc900 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=00005574e4aecc8c CR3=0000000009998000 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=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 info registers vcpu 1 RAX=1ffff11001374f9b RBX=ffff888009ba7ba8 RCX=0000000000000000 RDX=ffff88800c90d1c0 RSI=ffffffffffffffff RDI=ffff888009ba7ba8 RBP=0000000000000000 RSP=ffff888009ba7b40 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888009ba7cb8 R13=dffffc0000000000 R14=00007f814c70ffff R15=00007f814c70c000 RIP=ffffffff844b7304 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 00007f814bb99900 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=000055988723c018 CR3=000000000e764000 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=ffff000000000000ffff00000000ff00 XMM02=ffffff00ffffffffffff000000000000 XMM03=00000000000000ffffffffffffffff00 XMM04=00000000000000000000000000000000 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=637469775300000073656c000073696e XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000