syzkaller login: [ 53.901598] BUG: Bad rss-counter state mm:0000000075145195 type:MM_FILEPAGES val:33 [ 53.903381] BUG: Bad rss-counter state mm:0000000075145195 type:MM_ANONPAGES val:22 [ 54.071304] ================================================================== [ 54.072220] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.073162] Read of size 8 at addr ffff88800e11bb38 by task sshd/220 [ 54.073930] [ 54.074244] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 54.075136] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.076114] Call Trace: [ 54.076437] [ 54.076719] dump_stack_lvl+0x91/0xf0 [ 54.077202] print_report+0xcc/0x620 [ 54.077688] ? __virt_addr_valid+0x102/0x340 [ 54.078248] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.078868] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.079491] kasan_report+0xbe/0xf0 [ 54.079971] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.080599] vma_interval_tree_remove+0xc75/0xec0 [ 54.081206] vma_prepare+0xc54/0x11a0 [ 54.081688] __split_vma+0x5af/0x950 [ 54.082162] ? __pfx___split_vma+0x10/0x10 [ 54.082697] ? find_held_lock+0x2c/0x110 [ 54.083238] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.083813] ? lock_is_held_type+0x9f/0x120 [ 54.084350] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.084963] ? mtree_range_walk+0x632/0x900 [ 54.085510] ? mas_walk+0x5c7/0x7c0 [ 54.085989] do_vmi_munmap+0x1f1/0x2b0 [ 54.086478] mmap_region+0x1f9/0x2660 [ 54.086964] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.087495] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.088199] ? __pfx_lock_acquire+0x10/0x10 [ 54.088738] ? __pfx_mmap_region+0x10/0x10 [ 54.089280] ? security_mmap_addr+0x7d/0xa0 [ 54.089814] ? get_unmapped_area+0x1f5/0x3f0 [ 54.090360] do_mmap+0x854/0xf00 [ 54.090798] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.091307] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.091877] ksys_mmap_pgoff+0x3af/0x500 [ 54.092383] do_syscall_64+0x3f/0x90 [ 54.092867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.093515] RIP: 0033:0x7f4e42d69d82 [ 54.093971] 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 [ 54.096092] RSP: 002b:00007ffebccafb48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.096993] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4e42d69d82 [ 54.097832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4e421a3000 [ 54.098668] RBP: 00007f4e421a3000 R08: 0000000000000009 R09: 0000000000001000 [ 54.099522] R10: 0000000000000812 R11: 0000000000000206 R12: 000055957f13db20 [ 54.100358] R13: 00007ffebccafb60 R14: 00007ffebccafb90 R15: 00007ffebccafef0 [ 54.101207] [ 54.101495] [ 54.101710] Allocated by task 213: [ 54.102136] kasan_save_stack+0x22/0x50 [ 54.102641] kasan_set_track+0x25/0x30 [ 54.103136] __kasan_slab_alloc+0x59/0x70 [ 54.103657] kmem_cache_alloc+0x16b/0x370 [ 54.104180] vm_area_dup+0x20/0x160 [ 54.104637] __split_vma+0x170/0x950 [ 54.105100] split_vma+0xc6/0x110 [ 54.105549] mprotect_fixup+0x8d2/0xb30 [ 54.106046] do_mprotect_pkey+0x87e/0xd40 [ 54.106568] __x64_sys_mprotect+0x78/0xc0 [ 54.107153] do_syscall_64+0x3f/0x90 [ 54.107650] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.108288] [ 54.108504] Freed by task 213: [ 54.108893] kasan_save_stack+0x22/0x50 [ 54.109392] kasan_set_track+0x25/0x30 [ 54.109892] kasan_save_free_info+0x2b/0x50 [ 54.110425] __kasan_slab_free+0x10a/0x190 [ 54.110963] kmem_cache_free+0x10d/0x4d0 [ 54.111486] rcu_core+0x8c8/0x2860 [ 54.111929] __do_softirq+0x1b7/0x7d4 [ 54.112408] [ 54.112621] Last potentially related work creation: [ 54.113207] kasan_save_stack+0x22/0x50 [ 54.113709] __kasan_record_aux_stack+0x8e/0xa0 [ 54.114281] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.114925] remove_vma+0x139/0x170 [ 54.115391] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.115949] do_vmi_munmap+0x1f1/0x2b0 [ 54.116431] __vm_munmap+0x138/0x3a0 [ 54.116901] __x64_sys_munmap+0x59/0x80 [ 54.117406] do_syscall_64+0x3f/0x90 [ 54.117877] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.118516] [ 54.118732] Second to last potentially related work creation: [ 54.119416] kasan_save_stack+0x22/0x50 [ 54.119925] __kasan_record_aux_stack+0x8e/0xa0 [ 54.120495] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.121134] remove_vma+0x139/0x170 [ 54.121589] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.122144] do_vmi_munmap+0x1f1/0x2b0 [ 54.122628] mmap_region+0x1f9/0x2660 [ 54.123113] do_mmap+0x854/0xf00 [ 54.123548] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.124046] ksys_mmap_pgoff+0x3af/0x500 [ 54.124604] do_syscall_64+0x3f/0x90 [ 54.125125] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.125837] [ 54.126078] The buggy address belongs to the object at ffff88800e11bae0 [ 54.126078] which belongs to the cache vm_area_struct of size 168 [ 54.127726] The buggy address is located 88 bytes inside of [ 54.127726] freed 168-byte region [ffff88800e11bae0, ffff88800e11bb88) [ 54.129283] [ 54.129524] The buggy address belongs to the physical page: [ 54.130255] page:00000000f5c01866 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe11b [ 54.131465] memcg:ffff88800d45e801 [ 54.131941] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.132674] page_type: 0xffffffff() [ 54.133167] raw: 0100000000000200 ffff88800879fc80 ffffea000037f040 dead000000000004 [ 54.134130] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d45e801 [ 54.135042] page dumped because: kasan: bad access detected [ 54.135716] [ 54.135931] Memory state around the buggy address: [ 54.136521] ffff88800e11ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.137372] ffff88800e11ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 54.138232] >ffff88800e11bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.139102] ^ [ 54.139715] ffff88800e11bb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 54.140573] ffff88800e11bc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 54.141424] ================================================================== [ 54.142483] Disabling lock debugging due to kernel taint [ 56.208749] BUG: Bad rss-counter state mm:00000000933ca32d type:MM_FILEPAGES val:33 [ 56.209899] BUG: Bad rss-counter state mm:00000000933ca32d type:MM_ANONPAGES val:22 [ 56.577541] BUG: Bad rss-counter state mm:00000000953aafeb type:MM_FILEPAGES val:33 [ 56.578478] BUG: Bad rss-counter state mm:00000000953aafeb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41055' (ECDSA) to the list of known hosts. 2023/06/20 06:21:09 fuzzer started 2023/06/20 06:21:09 dialing manager at localhost:44161 2023/06/20 06:21:09 checking machine... 2023/06/20 06:21:09 checking revisions... [ 57.270615] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:21:09 testing simple program... [ 57.322315] cgroup: Unknown subsys name 'net' [ 57.366857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:20:54 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a78 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88806ce09ad0 RSP=ffff88806ce09a58 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88800dbd9700 RIP=ffffffff811fc897 RFL=00000287 [--S--PC] 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=00007f51bb07b930 CR3=000000000de24000 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=2039303a31323a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a31323a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88801a248001 RBX=ffff88801a247e20 RCX=0000000000000001 RDX=ffff88801a247e28 RSI=ffff88801a247df0 RDI=ffff88801a246ce8 RBP=ffff88801a240000 RSP=ffff88801a246c68 R8 =0000000000000001 R9 =ffff88801a246d18 R10=0000000000038001 R11=000000000001e456 R12=ffff88801a246d38 R13=ffff88801a246d20 R14=ffff88801a247df0 R15=ffff88801a246cd8 RIP=ffffffff81131cda RFL=00000202 [-------] 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 00007f9c4ffdc900 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=00007f9c4ff86008 CR3=000000000f0ca000 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=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