syzkaller login: [ 31.444872] BUG: Bad rss-counter state mm:000000004c127435 type:MM_FILEPAGES val:33 [ 31.445751] BUG: Bad rss-counter state mm:000000004c127435 type:MM_ANONPAGES val:22 [ 31.556298] ================================================================== [ 31.556973] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.557604] Read of size 8 at addr ffff88801a0d5798 by task sshd/219 [ 31.558123] [ 31.558274] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.558862] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.559528] Call Trace: [ 31.559750] [ 31.559939] dump_stack_lvl+0x91/0xf0 [ 31.560263] print_report+0xcc/0x620 [ 31.560587] ? __virt_addr_valid+0x102/0x340 [ 31.561059] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.561478] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.561892] kasan_report+0xbe/0xf0 [ 31.562219] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.562656] vma_interval_tree_remove+0xc75/0xec0 [ 31.563063] vma_prepare+0xc54/0x11a0 [ 31.563402] __split_vma+0x5af/0x950 [ 31.563725] ? __pfx___split_vma+0x10/0x10 [ 31.564087] ? find_held_lock+0x2c/0x110 [ 31.564437] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.564839] ? lock_is_held_type+0x9f/0x120 [ 31.565200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.565615] ? mtree_range_walk+0x632/0x900 [ 31.565988] ? mas_walk+0x5c7/0x7c0 [ 31.566303] do_vmi_munmap+0x1f1/0x2b0 [ 31.566631] mmap_region+0x1f9/0x2660 [ 31.566957] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.567308] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.567798] ? __pfx_lock_acquire+0x10/0x10 [ 31.568156] ? __pfx_mmap_region+0x10/0x10 [ 31.568518] ? security_mmap_addr+0x7d/0xa0 [ 31.568892] ? get_unmapped_area+0x1f5/0x3f0 [ 31.569268] do_mmap+0x854/0xf00 [ 31.569564] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.569893] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.570272] ksys_mmap_pgoff+0x3af/0x500 [ 31.570617] do_syscall_64+0x3f/0x90 [ 31.570951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.571394] RIP: 0033:0x7f34648d2d82 [ 31.571711] 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 [ 31.573178] RSP: 002b:00007ffcbd4ae038 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.573791] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34648d2d82 [ 31.574377] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3463d0c000 [ 31.574955] RBP: 00007f3463d0c000 R08: 0000000000000009 R09: 0000000000001000 [ 31.575522] R10: 0000000000000812 R11: 0000000000000206 R12: 00005572588afec0 [ 31.576098] R13: 00007ffcbd4ae050 R14: 00007ffcbd4ae080 R15: 00007ffcbd4ae3e0 [ 31.576682] [ 31.576900] [ 31.577017] Allocated by task 212: [ 31.577251] kasan_save_stack+0x22/0x50 [ 31.577666] kasan_set_track+0x25/0x30 [ 31.577945] __kasan_slab_alloc+0x59/0x70 [ 31.578242] kmem_cache_alloc+0x16b/0x370 [ 31.578547] vm_area_dup+0x20/0x160 [ 31.578806] __split_vma+0x170/0x950 [ 31.579071] split_vma+0xc6/0x110 [ 31.579320] mprotect_fixup+0x8d2/0xb30 [ 31.579611] do_mprotect_pkey+0x87e/0xd40 [ 31.579902] __x64_sys_mprotect+0x78/0xc0 [ 31.580200] do_syscall_64+0x3f/0x90 [ 31.580474] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.580944] [ 31.581060] Freed by task 212: [ 31.581273] kasan_save_stack+0x22/0x50 [ 31.581542] kasan_set_track+0x25/0x30 [ 31.581809] kasan_save_free_info+0x2b/0x50 [ 31.582095] __kasan_slab_free+0x10a/0x190 [ 31.582384] kmem_cache_free+0x10d/0x4d0 [ 31.582668] rcu_core+0x8c8/0x2860 [ 31.582910] __do_softirq+0x1b7/0x7d4 [ 31.583167] [ 31.583283] Last potentially related work creation: [ 31.583602] kasan_save_stack+0x22/0x50 [ 31.583872] __kasan_record_aux_stack+0x8e/0xa0 [ 31.584183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.584529] remove_vma+0x139/0x170 [ 31.584779] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.585176] do_vmi_munmap+0x1f1/0x2b0 [ 31.585503] __vm_munmap+0x138/0x3a0 [ 31.585817] __x64_sys_munmap+0x59/0x80 [ 31.586156] do_syscall_64+0x3f/0x90 [ 31.586482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.586913] [ 31.587059] The buggy address belongs to the object at ffff88801a0d5740 [ 31.587059] which belongs to the cache vm_area_struct of size 168 [ 31.588054] The buggy address is located 88 bytes inside of [ 31.588054] freed 168-byte region [ffff88801a0d5740, ffff88801a0d57e8) [ 31.589025] [ 31.589170] The buggy address belongs to the physical page: [ 31.589610] page:00000000afd01f4d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0d5 [ 31.590353] memcg:ffff888016907701 [ 31.590638] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.591065] page_type: 0xffffffff() [ 31.591366] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.591996] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016907701 [ 31.592625] page dumped because: kasan: bad access detected [ 31.593074] [ 31.593219] Memory state around the buggy address: [ 31.593609] ffff88801a0d5680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.594197] ffff88801a0d5700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.594777] >ffff88801a0d5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.595344] ^ [ 31.595676] ffff88801a0d5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.596265] ffff88801a0d5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.596859] ================================================================== [ 31.597501] Disabling lock debugging due to kernel taint [ 33.020821] BUG: Bad rss-counter state mm:00000000794e3666 type:MM_FILEPAGES val:33 [ 33.021512] BUG: Bad rss-counter state mm:00000000794e3666 type:MM_ANONPAGES val:22 [ 33.373570] BUG: Bad rss-counter state mm:00000000b297a3e6 type:MM_FILEPAGES val:33 [ 33.374210] BUG: Bad rss-counter state mm:00000000b297a3e6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1295' (ECDSA) to the list of known hosts. 2023/06/20 08:49:26 fuzzer started 2023/06/20 08:49:26 dialing manager at localhost:44161 2023/06/20 08:49:26 checking machine... 2023/06/20 08:49:26 checking revisions... [ 33.906098] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:49:26 testing simple program... [ 33.944040] cgroup: Unknown subsys name 'net' [ 33.976496] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:49:25 Registers: info registers vcpu 0 RAX=1ffffffff0a59065 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888015a48000 RSI=ffffffff81ef5ae0 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff888016717ca8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000053 R14=ffff888016717d80 R15=ffff888015d56780 RIP=ffffffff81ef5af0 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 00007fd5ca69b900 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=00007fd5cac50650 CR3=0000000019c00000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffef43d9258 CR3=000000000e302000 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=2035323a39343a3830203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035323a39343a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000