syzkaller login: [ 32.036850] BUG: Bad rss-counter state mm:00000000e8f13d28 type:MM_FILEPAGES val:33 [ 32.038052] BUG: Bad rss-counter state mm:00000000e8f13d28 type:MM_ANONPAGES val:22 [ 32.077668] ================================================================== [ 32.078694] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.079624] Read of size 8 at addr ffff88800fd773f8 by task sshd/220 [ 32.080414] [ 32.080633] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.081490] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.082455] Call Trace: [ 32.082774] [ 32.083057] dump_stack_lvl+0x91/0xf0 [ 32.083539] print_report+0xcc/0x620 [ 32.084017] ? __virt_addr_valid+0x102/0x340 [ 32.084572] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.085186] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.085792] kasan_report+0xbe/0xf0 [ 32.086266] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.086881] vma_interval_tree_remove+0xc75/0xec0 [ 32.087481] vma_prepare+0xc54/0x11a0 [ 32.087959] __split_vma+0x5af/0x950 [ 32.088435] ? __pfx___split_vma+0x10/0x10 [ 32.088962] ? find_held_lock+0x2c/0x110 [ 32.089480] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.090041] ? lock_is_held_type+0x9f/0x120 [ 32.090575] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.091177] ? mtree_range_walk+0x632/0x900 [ 32.091729] ? mas_walk+0x5c7/0x7c0 [ 32.092203] do_vmi_munmap+0x1f1/0x2b0 [ 32.092705] mmap_region+0x1f9/0x2660 [ 32.093181] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.093689] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.094410] ? __pfx_lock_acquire+0x10/0x10 [ 32.094942] ? __pfx_mmap_region+0x10/0x10 [ 32.095475] ? security_mmap_addr+0x7d/0xa0 [ 32.096011] ? get_unmapped_area+0x1f5/0x3f0 [ 32.096571] do_mmap+0x854/0xf00 [ 32.097011] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.097502] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.098068] ksys_mmap_pgoff+0x3af/0x500 [ 32.098570] do_syscall_64+0x3f/0x90 [ 32.099048] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.099690] RIP: 0033:0x7f639c40fd82 [ 32.100152] 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 [ 32.102280] RSP: 002b:00007ffc72ca9028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.103181] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f639c40fd82 [ 32.104021] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f639b849000 [ 32.104975] RBP: 00007f639b849000 R08: 0000000000000009 R09: 0000000000001000 [ 32.105821] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b64d07eb20 [ 32.106673] R13: 00007ffc72ca9040 R14: 00007ffc72ca9070 R15: 00007ffc72ca93d0 [ 32.107541] [ 32.107829] [ 32.108045] Allocated by task 213: [ 32.108500] kasan_save_stack+0x22/0x50 [ 32.109009] kasan_set_track+0x25/0x30 [ 32.109502] __kasan_slab_alloc+0x59/0x70 [ 32.110023] kmem_cache_alloc+0x16b/0x370 [ 32.110538] vm_area_dup+0x20/0x160 [ 32.110996] __split_vma+0x170/0x950 [ 32.111463] split_vma+0xc6/0x110 [ 32.111899] mprotect_fixup+0x8d2/0xb30 [ 32.112408] do_mprotect_pkey+0x87e/0xd40 [ 32.112925] __x64_sys_mprotect+0x78/0xc0 [ 32.113449] do_syscall_64+0x3f/0x90 [ 32.113926] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.114567] [ 32.114784] Freed by task 213: [ 32.115169] kasan_save_stack+0x22/0x50 [ 32.115671] kasan_set_track+0x25/0x30 [ 32.116166] kasan_save_free_info+0x2b/0x50 [ 32.116708] __kasan_slab_free+0x10a/0x190 [ 32.117245] kmem_cache_free+0x10d/0x4d0 [ 32.117757] rcu_core+0x8c8/0x2860 [ 32.118211] __do_softirq+0x1b7/0x7d4 [ 32.118688] [ 32.118905] Last potentially related work creation: [ 32.119481] kasan_save_stack+0x22/0x50 [ 32.119984] __kasan_record_aux_stack+0x8e/0xa0 [ 32.120589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.121235] remove_vma+0x139/0x170 [ 32.121684] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.122235] do_vmi_munmap+0x1f1/0x2b0 [ 32.122718] __vm_munmap+0x138/0x3a0 [ 32.123181] __x64_sys_munmap+0x59/0x80 [ 32.123672] do_syscall_64+0x3f/0x90 [ 32.124144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.124794] [ 32.125007] The buggy address belongs to the object at ffff88800fd773a0 [ 32.125007] which belongs to the cache vm_area_struct of size 168 [ 32.126466] The buggy address is located 88 bytes inside of [ 32.126466] freed 168-byte region [ffff88800fd773a0, ffff88800fd77448) [ 32.127874] [ 32.128088] The buggy address belongs to the physical page: [ 32.128765] page:000000009b229b85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd77 [ 32.129844] memcg:ffff88800fc36c01 [ 32.130271] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.130919] page_type: 0xffffffff() [ 32.131372] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.132304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fc36c01 [ 32.133222] page dumped because: kasan: bad access detected [ 32.133883] [ 32.134097] Memory state around the buggy address: [ 32.134681] ffff88800fd77280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 32.135528] ffff88800fd77300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 32.136397] >ffff88800fd77380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.137258] ^ [ 32.138095] ffff88800fd77400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.138959] ffff88800fd77480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.139818] ================================================================== [ 32.140892] Disabling lock debugging due to kernel taint [ 33.946012] BUG: Bad rss-counter state mm:00000000ef68e99b type:MM_FILEPAGES val:33 [ 33.947428] BUG: Bad rss-counter state mm:00000000ef68e99b type:MM_ANONPAGES val:22 [ 34.357016] BUG: Bad rss-counter state mm:00000000eb3942bf type:MM_FILEPAGES val:33 [ 34.357955] BUG: Bad rss-counter state mm:00000000eb3942bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59084' (ECDSA) to the list of known hosts. 2023/06/19 23:55:43 fuzzer started 2023/06/19 23:55:43 dialing manager at localhost:44161 2023/06/19 23:55:43 checking machine... 2023/06/19 23:55:43 checking revisions... [ 35.045885] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:55:43 testing simple program... [ 35.092228] cgroup: Unknown subsys name 'net' [ 35.153494] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:55:42 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdef6517e8 CR3=000000000ced0000 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=2032343a35353a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a35353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800ef177f8 RSP=ffff88800ef17730 R8 =ffffffff864b024a R9 =ffff88800ef177e0 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff88800ef17800 R13=ffff88800ef177e8 R14=0000000000000004 R15=ffff88800ef177a0 RIP=ffffffff81130b1f RFL=00000293 [--S-A-C] 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 00007f0ddd133900 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=00007f0ddd6eb0b0 CR3=0000000018eb2000 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