syzkaller login: [ 32.389239] BUG: Bad rss-counter state mm:0000000027f8dd12 type:MM_FILEPAGES val:33 [ 32.391148] BUG: Bad rss-counter state mm:0000000027f8dd12 type:MM_ANONPAGES val:22 [ 32.550654] ================================================================== [ 32.551714] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.552932] Read of size 8 at addr ffff88800e3d54e0 by task sshd/221 [ 32.554077] [ 32.554356] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.555268] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.556291] Call Trace: [ 32.556627] [ 32.556924] dump_stack_lvl+0x91/0xf0 [ 32.557437] print_report+0xcc/0x620 [ 32.557943] ? __virt_addr_valid+0x102/0x340 [ 32.558526] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.559174] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.559811] kasan_report+0xbe/0xf0 [ 32.560305] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.560946] vma_interval_tree_remove+0xc75/0xec0 [ 32.561569] vma_prepare+0xc54/0x11a0 [ 32.562067] __split_vma+0x5af/0x950 [ 32.562593] ? __pfx___split_vma+0x10/0x10 [ 32.563152] ? find_held_lock+0x2c/0x110 [ 32.563694] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.564287] ? lock_is_held_type+0x9f/0x120 [ 32.564849] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.565491] ? mtree_range_walk+0x632/0x900 [ 32.566062] ? mas_walk+0x5c7/0x7c0 [ 32.566566] do_vmi_munmap+0x1f1/0x2b0 [ 32.567080] mmap_region+0x1f9/0x2660 [ 32.567589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.568120] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.568856] ? __pfx_lock_acquire+0x10/0x10 [ 32.569412] ? __pfx_mmap_region+0x10/0x10 [ 32.569970] ? security_mmap_addr+0x7d/0xa0 [ 32.570567] ? get_unmapped_area+0x1f5/0x3f0 [ 32.571142] do_mmap+0x854/0xf00 [ 32.571600] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.572112] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.572694] ksys_mmap_pgoff+0x3af/0x500 [ 32.573225] do_syscall_64+0x3f/0x90 [ 32.573723] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.574393] RIP: 0033:0x7f8eeea9cd82 [ 32.574876] 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 [ 32.577115] RSP: 002b:00007ffd5922b468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.578062] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8eeea9cd82 [ 32.578961] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8eeded6000 [ 32.579848] RBP: 00007f8eeded6000 R08: 0000000000000009 R09: 0000000000001000 [ 32.580737] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582f6469f70 [ 32.581631] R13: 00007ffd5922b480 R14: 00007ffd5922b4b0 R15: 00007ffd5922b810 [ 32.582542] [ 32.582845] [ 32.583067] Allocated by task 214: [ 32.583514] kasan_save_stack+0x22/0x50 [ 32.584036] kasan_set_track+0x25/0x30 [ 32.584552] __kasan_slab_alloc+0x59/0x70 [ 32.585096] kmem_cache_alloc+0x16b/0x370 [ 32.585636] vm_area_dup+0x20/0x160 [ 32.586109] __split_vma+0x170/0x950 [ 32.586608] split_vma+0xc6/0x110 [ 32.587058] mprotect_fixup+0x8d2/0xb30 [ 32.587592] do_mprotect_pkey+0x87e/0xd40 [ 32.588131] __x64_sys_mprotect+0x78/0xc0 [ 32.588672] do_syscall_64+0x3f/0x90 [ 32.589164] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.589834] [ 32.590054] Freed by task 214: [ 32.590462] kasan_save_stack+0x22/0x50 [ 32.590993] kasan_set_track+0x25/0x30 [ 32.591505] kasan_save_free_info+0x2b/0x50 [ 32.592058] __kasan_slab_free+0x10a/0x190 [ 32.592615] kmem_cache_free+0x10d/0x4d0 [ 32.593144] rcu_core+0x8c8/0x2860 [ 32.593609] __do_softirq+0x1b7/0x7d4 [ 32.594100] [ 32.594324] Last potentially related work creation: [ 32.595022] kasan_save_stack+0x22/0x50 [ 32.595539] __kasan_record_aux_stack+0x8e/0xa0 [ 32.596134] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.596797] remove_vma+0x139/0x170 [ 32.597270] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.597844] do_vmi_munmap+0x1f1/0x2b0 [ 32.598349] __vm_munmap+0x138/0x3a0 [ 32.598843] __x64_sys_munmap+0x59/0x80 [ 32.599355] do_syscall_64+0x3f/0x90 [ 32.599848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.600510] [ 32.600735] The buggy address belongs to the object at ffff88800e3d5488 [ 32.600735] which belongs to the cache vm_area_struct of size 168 [ 32.602272] The buggy address is located 88 bytes inside of [ 32.602272] freed 168-byte region [ffff88800e3d5488, ffff88800e3d5530) [ 32.603764] [ 32.603985] The buggy address belongs to the physical page: [ 32.604670] page:00000000bf640cfd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3d5 [ 32.605801] memcg:ffff88800e682701 [ 32.606246] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.606923] page_type: 0xffffffff() [ 32.607388] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.608354] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e682701 [ 32.609298] page dumped because: kasan: bad access detected [ 32.609988] [ 32.610212] Memory state around the buggy address: [ 32.610838] ffff88800e3d5380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.611728] ffff88800e3d5400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 32.612627] >ffff88800e3d5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.613514] ^ [ 32.614301] ffff88800e3d5500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 32.615212] ffff88800e3d5580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.616101] ================================================================== [ 32.617115] Disabling lock debugging due to kernel taint [ 34.588348] BUG: Bad rss-counter state mm:000000001b43c752 type:MM_FILEPAGES val:33 [ 34.589335] BUG: Bad rss-counter state mm:000000001b43c752 type:MM_ANONPAGES val:22 [ 35.085443] BUG: Bad rss-counter state mm:00000000f7901e58 type:MM_FILEPAGES val:33 [ 35.086416] BUG: Bad rss-counter state mm:00000000f7901e58 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62142' (ECDSA) to the list of known hosts. 2023/06/20 02:38:56 fuzzer started 2023/06/20 02:38:56 dialing manager at localhost:44161 2023/06/20 02:38:56 checking machine... 2023/06/20 02:38:56 checking revisions... [ 35.805948] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:38:56 testing simple program... [ 35.853072] cgroup: Unknown subsys name 'net' [ 35.907739] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:38:54 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=dffffc0000000000 RCX=0000000000000003 RDX=1ffffffff0ba7794 RSI=ffffea000040c000 RDI=ffffffff85d3bca0 RBP=ffffea000040c200 RSP=ffff888008d7fb20 R8 =0000000000000000 R9 =ffff88807ffdc6d8 R10=ffffea000040c230 R11=0000000000010308 R12=0000000000000003 R13=ffffea000040c000 R14=0000000000010300 R15=ffff88807ffdc500 RIP=ffffffff817895c4 RFL=00000046 [---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 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=00007f0c985e6940 CR3=000000000ca36000 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=60a0c6fdfb76dfb256420db45f2db6f4 XMM02=000000000011db98d59e07bde36eea69 XMM03=000000000011dcc0ec2efd57dc4c00df XMM04=029be1283c43108400000000000ae988 XMM05=d0f3c35d4b724b560000000000135bf0 XMM06=e4cb8bb95a7664b60000000000134a88 XMM07=fb795ef6d65770560000000000124f88 XMM08=2c67c8bc2e329bc3000000000011dcc0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88801ae7f000 RCX=ffff88801ae7f000 RDX=0000000000120012 RSI=ffff88801ae7f000 RDI=ffff88800879fdc0 RBP=ffff88800bbc77f8 RSP=ffff88800bbc7760 R8 =0000000000000001 R9 =ffffffff818101af R10=ffffea00006b9fc0 R11=0000000080110007 R12=ffffea00006b9fc0 R13=0000000000000000 R14=0000000000120011 R15=ffff88800879fdc0 RIP=ffffffff818094d2 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 00007f9f43d62900 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=00007f9f44317650 CR3=0000000015a72000 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=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