syzkaller login: [ 30.766158] BUG: Bad rss-counter state mm:00000000ae2b41b9 type:MM_FILEPAGES val:33 [ 30.767383] BUG: Bad rss-counter state mm:00000000ae2b41b9 type:MM_ANONPAGES val:22 [ 30.938428] ================================================================== [ 30.939567] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.940891] Read of size 8 at addr ffff888018ce9880 by task sshd/222 [ 30.941834] [ 30.942109] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.943197] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.944434] Call Trace: [ 30.944772] [ 30.945062] dump_stack_lvl+0x91/0xf0 [ 30.945551] print_report+0xcc/0x620 [ 30.946035] ? __virt_addr_valid+0x102/0x340 [ 30.946583] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947211] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.947829] kasan_report+0xbe/0xf0 [ 30.948310] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.948938] vma_interval_tree_remove+0xc75/0xec0 [ 30.949541] vma_prepare+0xc54/0x11a0 [ 30.950030] __split_vma+0x5af/0x950 [ 30.950497] ? __pfx___split_vma+0x10/0x10 [ 30.951025] ? find_held_lock+0x2c/0x110 [ 30.951555] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.952129] ? lock_is_held_type+0x9f/0x120 [ 30.952685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.953296] ? mtree_range_walk+0x632/0x900 [ 30.953853] ? mas_walk+0x5c7/0x7c0 [ 30.954336] do_vmi_munmap+0x1f1/0x2b0 [ 30.954835] mmap_region+0x1f9/0x2660 [ 30.955318] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.955834] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.956568] ? __pfx_lock_acquire+0x10/0x10 [ 30.957100] ? __pfx_mmap_region+0x10/0x10 [ 30.957629] ? security_mmap_addr+0x7d/0xa0 [ 30.958151] ? get_unmapped_area+0x1f5/0x3f0 [ 30.958698] do_mmap+0x854/0xf00 [ 30.959137] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.959629] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.960192] ksys_mmap_pgoff+0x3af/0x500 [ 30.960716] do_syscall_64+0x3f/0x90 [ 30.961200] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.961835] RIP: 0033:0x7f9289bbad82 [ 30.962286] 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 [ 30.964409] RSP: 002b:00007ffc28bb1878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.965314] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9289bbad82 [ 30.966156] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9288ff4000 [ 30.966995] RBP: 00007f9288ff4000 R08: 0000000000000009 R09: 0000000000001000 [ 30.967825] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d013e6ec0 [ 30.968681] R13: 00007ffc28bb1890 R14: 00007ffc28bb18c0 R15: 00007ffc28bb1c20 [ 30.969529] [ 30.969819] [ 30.970038] Allocated by task 215: [ 30.970461] kasan_save_stack+0x22/0x50 [ 30.970969] kasan_set_track+0x25/0x30 [ 30.971466] __kasan_slab_alloc+0x59/0x70 [ 30.971986] kmem_cache_alloc+0x16b/0x370 [ 30.972509] vm_area_dup+0x20/0x160 [ 30.972958] __split_vma+0x170/0x950 [ 30.973419] split_vma+0xc6/0x110 [ 30.973862] mprotect_fixup+0x8d2/0xb30 [ 30.974362] do_mprotect_pkey+0x87e/0xd40 [ 30.974879] __x64_sys_mprotect+0x78/0xc0 [ 30.975396] do_syscall_64+0x3f/0x90 [ 30.975869] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.976531] [ 30.976752] Freed by task 19: [ 30.977129] kasan_save_stack+0x22/0x50 [ 30.977632] kasan_set_track+0x25/0x30 [ 30.978123] kasan_save_free_info+0x2b/0x50 [ 30.978660] __kasan_slab_free+0x10a/0x190 [ 30.979191] kmem_cache_free+0x10d/0x4d0 [ 30.979707] rcu_core+0x8c8/0x2860 [ 30.980150] __do_softirq+0x1b7/0x7d4 [ 30.980634] [ 30.980848] Last potentially related work creation: [ 30.981490] kasan_save_stack+0x22/0x50 [ 30.982000] __kasan_record_aux_stack+0x8e/0xa0 [ 30.982565] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.983203] remove_vma+0x139/0x170 [ 30.983656] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.984209] do_vmi_munmap+0x1f1/0x2b0 [ 30.984725] __vm_munmap+0x138/0x3a0 [ 30.985194] __x64_sys_munmap+0x59/0x80 [ 30.985690] do_syscall_64+0x3f/0x90 [ 30.986166] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.986812] [ 30.987033] The buggy address belongs to the object at ffff888018ce9828 [ 30.987033] which belongs to the cache vm_area_struct of size 168 [ 30.988513] The buggy address is located 88 bytes inside of [ 30.988513] freed 168-byte region [ffff888018ce9828, ffff888018ce98d0) [ 30.989919] [ 30.990136] The buggy address belongs to the physical page: [ 30.990800] page:000000000efacde1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ce9 [ 30.991887] memcg:ffff888015970901 [ 30.992324] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.992971] page_type: 0xffffffff() [ 30.993422] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.994338] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015970901 [ 30.995244] page dumped because: kasan: bad access detected [ 30.995901] [ 30.996122] Memory state around the buggy address: [ 30.996715] ffff888018ce9780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.997578] ffff888018ce9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.998447] >ffff888018ce9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.999309] ^ [ 30.999725] ffff888018ce9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.000592] ffff888018ce9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.001443] ================================================================== [ 31.002465] Disabling lock debugging due to kernel taint [ 32.876949] BUG: Bad rss-counter state mm:000000000d0d96f8 type:MM_FILEPAGES val:33 [ 32.877692] BUG: Bad rss-counter state mm:000000000d0d96f8 type:MM_ANONPAGES val:22 [ 33.396919] BUG: Bad rss-counter state mm:000000004721646c type:MM_FILEPAGES val:33 [ 33.398095] BUG: Bad rss-counter state mm:000000004721646c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34326' (ECDSA) to the list of known hosts. 2023/06/20 12:43:39 fuzzer started 2023/06/20 12:43:39 dialing manager at localhost:36067 2023/06/20 12:43:39 checking machine... 2023/06/20 12:43:39 checking revisions... [ 34.074221] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:43:39 testing simple program... [ 34.116380] cgroup: Unknown subsys name 'net' [ 34.154567] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:43:39 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=000000000000c000 RCX=0000000000000000 RDX=1ffff110032f0e78 RSI=000000000000c000 RDI=0000000000004000 RBP=ffff8880087f4780 RSP=ffff8880168c7e90 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888009484500 R13=ffff8880197873c0 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c03d4 RFL=00000286 [--S--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 00007f99bb408900 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=00007ffcf9b01000 CR3=000000000e1e4000 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=563412feff00545000000000000080fe XMM01=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f8ea675d950 CR3=000000000f2e8000 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=5d1328b5c5e5cba1b845c4b9326929e2 XMM02=ec2efd57dc4c00df000000000011d208 XMM03=fa38ca043b41492a000000000011d2d8 XMM04=fe0eeb7ce9b40bf200000000000ae988 XMM05=5a9d233068761c4a00000000001316f8 XMM06=6056c8ee82b330860000000000130560 XMM07=e042d86d42eb936e0000000000121bc0 XMM08=fa38ca043b41492a000000000011d2d8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000