syzkaller login: [ 31.347312] BUG: Bad rss-counter state mm:00000000ae8b0921 type:MM_FILEPAGES val:33 [ 31.348551] BUG: Bad rss-counter state mm:00000000ae8b0921 type:MM_ANONPAGES val:22 [ 31.385401] ================================================================== [ 31.386492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.387594] Read of size 8 at addr ffff88800cf06880 by task sshd/220 [ 31.388548] [ 31.388773] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.389728] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.390740] Call Trace: [ 31.391098] [ 31.391430] dump_stack_lvl+0x91/0xf0 [ 31.391943] print_report+0xcc/0x620 [ 31.392496] ? __virt_addr_valid+0x102/0x340 [ 31.393165] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.393871] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.394571] kasan_report+0xbe/0xf0 [ 31.395118] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.395828] vma_interval_tree_remove+0xc75/0xec0 [ 31.396510] vma_prepare+0xc54/0x11a0 [ 31.397022] __split_vma+0x5af/0x950 [ 31.397525] ? __pfx___split_vma+0x10/0x10 [ 31.398133] ? find_held_lock+0x2c/0x110 [ 31.398745] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.399326] ? lock_is_held_type+0x9f/0x120 [ 31.399867] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.400479] ? mtree_range_walk+0x632/0x900 [ 31.401040] ? mas_walk+0x5c7/0x7c0 [ 31.401622] do_vmi_munmap+0x1f1/0x2b0 [ 31.402160] mmap_region+0x1f9/0x2660 [ 31.402657] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.403261] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.404110] ? __pfx_lock_acquire+0x10/0x10 [ 31.404658] ? __pfx_mmap_region+0x10/0x10 [ 31.405270] ? security_mmap_addr+0x7d/0xa0 [ 31.405887] ? get_unmapped_area+0x1f5/0x3f0 [ 31.406572] do_mmap+0x854/0xf00 [ 31.407062] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.407565] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.408133] ksys_mmap_pgoff+0x3af/0x500 [ 31.408638] do_syscall_64+0x3f/0x90 [ 31.409136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.409786] RIP: 0033:0x7f93d2a56d82 [ 31.410247] 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 [ 31.412374] RSP: 002b:00007ffcf1dac418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.413306] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f93d2a56d82 [ 31.414174] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93d1e90000 [ 31.415033] RBP: 00007f93d1e90000 R08: 0000000000000009 R09: 0000000000001000 [ 31.415883] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c28675f60 [ 31.416727] R13: 00007ffcf1dac430 R14: 00007ffcf1dac460 R15: 00007ffcf1dac7c0 [ 31.417609] [ 31.417912] [ 31.418134] Allocated by task 213: [ 31.418574] kasan_save_stack+0x22/0x50 [ 31.419078] kasan_set_track+0x25/0x30 [ 31.419576] __kasan_slab_alloc+0x59/0x70 [ 31.420109] kmem_cache_alloc+0x16b/0x370 [ 31.420624] vm_area_dup+0x20/0x160 [ 31.421116] __split_vma+0x170/0x950 [ 31.421585] split_vma+0xc6/0x110 [ 31.422036] mprotect_fixup+0x8d2/0xb30 [ 31.422540] do_mprotect_pkey+0x87e/0xd40 [ 31.423069] __x64_sys_mprotect+0x78/0xc0 [ 31.423591] do_syscall_64+0x3f/0x90 [ 31.424067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.424717] [ 31.424939] Freed by task 213: [ 31.425333] kasan_save_stack+0x22/0x50 [ 31.425836] kasan_set_track+0x25/0x30 [ 31.426373] kasan_save_free_info+0x2b/0x50 [ 31.426906] __kasan_slab_free+0x10a/0x190 [ 31.427448] kmem_cache_free+0x10d/0x4d0 [ 31.428006] rcu_core+0x8c8/0x2860 [ 31.428478] __do_softirq+0x1b7/0x7d4 [ 31.428977] [ 31.429192] Last potentially related work creation: [ 31.429788] kasan_save_stack+0x22/0x50 [ 31.430319] __kasan_record_aux_stack+0x8e/0xa0 [ 31.430908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.431537] remove_vma+0x139/0x170 [ 31.431969] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.432518] do_vmi_munmap+0x1f1/0x2b0 [ 31.433049] __vm_munmap+0x138/0x3a0 [ 31.433536] __x64_sys_munmap+0x59/0x80 [ 31.434037] do_syscall_64+0x3f/0x90 [ 31.434514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435177] [ 31.435399] Second to last potentially related work creation: [ 31.436105] kasan_save_stack+0x22/0x50 [ 31.436616] __kasan_record_aux_stack+0x8e/0xa0 [ 31.437205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.437858] remove_vma+0x139/0x170 [ 31.438309] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.438887] do_vmi_munmap+0x1f1/0x2b0 [ 31.439386] mmap_region+0x1f9/0x2660 [ 31.439877] do_mmap+0x854/0xf00 [ 31.440324] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.440815] ksys_mmap_pgoff+0x3af/0x500 [ 31.441338] do_syscall_64+0x3f/0x90 [ 31.441826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.442492] [ 31.442702] The buggy address belongs to the object at ffff88800cf06828 [ 31.442702] which belongs to the cache vm_area_struct of size 168 [ 31.444085] The buggy address is located 88 bytes inside of [ 31.444085] freed 168-byte region [ffff88800cf06828, ffff88800cf068d0) [ 31.445504] [ 31.445723] The buggy address belongs to the physical page: [ 31.446425] page:00000000db2ce083 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcf06 [ 31.447525] memcg:ffff88800eac4701 [ 31.447953] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.448666] page_type: 0xffffffff() [ 31.449151] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.450082] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eac4701 [ 31.450991] page dumped because: kasan: bad access detected [ 31.451658] [ 31.451877] Memory state around the buggy address: [ 31.452461] ffff88800cf06780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.453347] ffff88800cf06800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.454234] >ffff88800cf06880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.455102] ^ [ 31.455512] ffff88800cf06900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.456376] ffff88800cf06980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.457238] ================================================================== [ 31.458170] Disabling lock debugging due to kernel taint [ 33.271507] BUG: Bad rss-counter state mm:000000006fb47ef4 type:MM_FILEPAGES val:33 [ 33.272247] BUG: Bad rss-counter state mm:000000006fb47ef4 type:MM_ANONPAGES val:22 [ 33.698386] BUG: Bad rss-counter state mm:0000000027ec72ce type:MM_FILEPAGES val:33 [ 33.699519] BUG: Bad rss-counter state mm:0000000027ec72ce type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24690' (ECDSA) to the list of known hosts. 2023/06/21 06:38:09 fuzzer started 2023/06/21 06:38:09 dialing manager at localhost:36067 2023/06/21 06:38:09 checking machine... 2023/06/21 06:38:09 checking revisions... [ 34.412677] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:38:09 testing simple program... [ 34.455464] cgroup: Unknown subsys name 'net' [ 34.502994] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:38:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f7890abb620 CR3=000000000b3e0000 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=2038303a38333a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a38333a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=1ffff11002cc9fac RCX=ffffffff817181c1 RDX=ffff88801a1ad1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff8880183a1a40 RSP=ffff88801664fd38 R8 =0000000000000007 R9 =0000000000000000 R10=0000000016ac1007 R11=0000000000000000 R12=0000565228fd2bec R13=ffffffff852c61f8 R14=ffff888016d5ae40 R15=0000000016ac1067 RIP=ffffffff814c086b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1c3f23d900 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=0000565228fd2bec CR3=000000000f6ba000 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=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