syzkaller login: [ 30.970330] BUG: Bad rss-counter state mm:000000001d5f5fe1 type:MM_FILEPAGES val:33 [ 30.971561] BUG: Bad rss-counter state mm:000000001d5f5fe1 type:MM_ANONPAGES val:22 [ 31.136422] ================================================================== [ 31.137332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.138289] Read of size 8 at addr ffff888010195a50 by task sshd/221 [ 31.139087] [ 31.139395] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.140265] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.141279] Call Trace: [ 31.141619] [ 31.141911] dump_stack_lvl+0x91/0xf0 [ 31.142442] print_report+0xcc/0x620 [ 31.142941] ? __virt_addr_valid+0x102/0x340 [ 31.143515] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144139] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.144757] kasan_report+0xbe/0xf0 [ 31.145236] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.145855] vma_interval_tree_remove+0xc75/0xec0 [ 31.146487] vma_prepare+0xc54/0x11a0 [ 31.146967] __split_vma+0x5af/0x950 [ 31.147460] ? __pfx___split_vma+0x10/0x10 [ 31.147992] ? find_held_lock+0x2c/0x110 [ 31.148516] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.149086] ? lock_is_held_type+0x9f/0x120 [ 31.149629] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.150239] ? mtree_range_walk+0x632/0x900 [ 31.150834] ? mas_walk+0x5c7/0x7c0 [ 31.151320] do_vmi_munmap+0x1f1/0x2b0 [ 31.151815] mmap_region+0x1f9/0x2660 [ 31.152305] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.152817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.153541] ? __pfx_lock_acquire+0x10/0x10 [ 31.154069] ? __pfx_mmap_region+0x10/0x10 [ 31.154603] ? security_mmap_addr+0x7d/0xa0 [ 31.155142] ? get_unmapped_area+0x1f5/0x3f0 [ 31.155698] do_mmap+0x854/0xf00 [ 31.156145] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.156641] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.157203] ksys_mmap_pgoff+0x3af/0x500 [ 31.157708] do_syscall_64+0x3f/0x90 [ 31.158192] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.158868] RIP: 0033:0x7f6081f0bd82 [ 31.159323] 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 [ 31.161445] RSP: 002b:00007ffe1c1d3548 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.162362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6081f0bd82 [ 31.163242] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6081345000 [ 31.164103] RBP: 00007f6081345000 R08: 0000000000000009 R09: 0000000000001000 [ 31.164966] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641ae640f60 [ 31.165823] R13: 00007ffe1c1d3560 R14: 00007ffe1c1d3590 R15: 00007ffe1c1d38f0 [ 31.166691] [ 31.166984] [ 31.167206] Allocated by task 214: [ 31.167639] kasan_save_stack+0x22/0x50 [ 31.168152] kasan_set_track+0x25/0x30 [ 31.168657] __kasan_slab_alloc+0x59/0x70 [ 31.169192] kmem_cache_alloc+0x16b/0x370 [ 31.169713] vm_area_dup+0x20/0x160 [ 31.170174] __split_vma+0x170/0x950 [ 31.170658] split_vma+0xc6/0x110 [ 31.171092] mprotect_fixup+0x8d2/0xb30 [ 31.171607] do_mprotect_pkey+0x87e/0xd40 [ 31.172139] __x64_sys_mprotect+0x78/0xc0 [ 31.172665] do_syscall_64+0x3f/0x90 [ 31.173148] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.173794] [ 31.174011] Freed by task 214: [ 31.174416] kasan_save_stack+0x22/0x50 [ 31.174920] kasan_set_track+0x25/0x30 [ 31.175426] kasan_save_free_info+0x2b/0x50 [ 31.175967] __kasan_slab_free+0x10a/0x190 [ 31.176511] kmem_cache_free+0x10d/0x4d0 [ 31.177031] rcu_core+0x8c8/0x2860 [ 31.177474] __do_softirq+0x1b7/0x7d4 [ 31.177954] [ 31.178175] Last potentially related work creation: [ 31.178771] kasan_save_stack+0x22/0x50 [ 31.179270] __kasan_record_aux_stack+0x8e/0xa0 [ 31.179848] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.180489] remove_vma+0x139/0x170 [ 31.180952] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.181530] do_vmi_munmap+0x1f1/0x2b0 [ 31.182024] __vm_munmap+0x138/0x3a0 [ 31.182505] __x64_sys_munmap+0x59/0x80 [ 31.183010] do_syscall_64+0x3f/0x90 [ 31.183487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.184126] [ 31.184341] The buggy address belongs to the object at ffff8880101959f8 [ 31.184341] which belongs to the cache vm_area_struct of size 168 [ 31.185825] The buggy address is located 88 bytes inside of [ 31.185825] freed 168-byte region [ffff8880101959f8, ffff888010195aa0) [ 31.187264] [ 31.187484] The buggy address belongs to the physical page: [ 31.188164] page:0000000076535452 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x10195 [ 31.189313] memcg:ffff88800cb99201 [ 31.189748] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.190469] page_type: 0xffffffff() [ 31.190929] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.191852] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb99201 [ 31.192759] page dumped because: kasan: bad access detected [ 31.193419] [ 31.193639] Memory state around the buggy address: [ 31.194217] ffff888010195900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.195074] ffff888010195980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.195924] >ffff888010195a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.196841] ^ [ 31.197563] ffff888010195a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.198450] ffff888010195b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.199304] ================================================================== [ 31.200297] Disabling lock debugging due to kernel taint [ 33.435395] BUG: Bad rss-counter state mm:00000000d7b2d888 type:MM_FILEPAGES val:33 [ 33.436380] BUG: Bad rss-counter state mm:00000000d7b2d888 type:MM_ANONPAGES val:22 [ 34.015892] BUG: Bad rss-counter state mm:00000000d77d8391 type:MM_FILEPAGES val:33 [ 34.016989] BUG: Bad rss-counter state mm:00000000d77d8391 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9632' (ECDSA) to the list of known hosts. 2023/06/21 02:39:18 fuzzer started 2023/06/21 02:39:18 dialing manager at localhost:36067 2023/06/21 02:39:18 checking machine... 2023/06/21 02:39:18 checking revisions... [ 34.644087] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:39:19 testing simple program... [ 34.689303] cgroup: Unknown subsys name 'net' [ 34.737939] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:39:18 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000002f1 RCX=1ffff1100121ea31 RDX=1ffff110025689fa RSI=ffffffff81f3bb95 RDI=ffff888016487bdc RBP=ffff888016487bd8 RSP=ffff888016487a50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000008000 R11=0000000000000000 R12=0000000000000000 R13=0000000000007fff R14=00000000000002f1 R15=0000000000000031 RIP=ffffffff81f3bd16 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 00007faca0ea6900 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=00007faca145e0b0 CR3=000000000ef7e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f855a9b9320 CR3=000000001435a000 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=2038313a39333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a39333a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000