syzkaller login: [ 31.029083] BUG: Bad rss-counter state mm:00000000af3d8d3c type:MM_FILEPAGES val:33 [ 31.029669] BUG: Bad rss-counter state mm:00000000af3d8d3c type:MM_ANONPAGES val:22 [ 31.206709] ================================================================== [ 31.207971] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.208788] Read of size 8 at addr ffff88800f653798 by task sshd/220 [ 31.209384] [ 31.209549] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.210242] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.210979] Call Trace: [ 31.211224] [ 31.211439] dump_stack_lvl+0x91/0xf0 [ 31.211812] print_report+0xcc/0x620 [ 31.212187] ? __virt_addr_valid+0x102/0x340 [ 31.212602] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213069] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.213551] kasan_report+0xbe/0xf0 [ 31.213916] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.214387] vma_interval_tree_remove+0xc75/0xec0 [ 31.214846] vma_prepare+0xc54/0x11a0 [ 31.215213] __split_vma+0x5af/0x950 [ 31.215567] ? __pfx___split_vma+0x10/0x10 [ 31.215967] ? mark_lock.part.0+0xef/0x2f50 [ 31.216378] ? __pfx_mark_lock.part.0+0x10/0x10 [ 31.216816] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.217246] ? lock_is_held_type+0x9f/0x120 [ 31.217679] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.218153] ? mtree_range_walk+0x632/0x900 [ 31.218601] ? mas_walk+0x5c7/0x7c0 [ 31.218869] do_vmi_munmap+0x1f1/0x2b0 [ 31.219166] mmap_region+0x1f9/0x2660 [ 31.219446] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.219741] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.220150] ? __pfx_lock_acquire+0x10/0x10 [ 31.220450] ? __pfx_mmap_region+0x10/0x10 [ 31.220758] ? security_mmap_addr+0x7d/0xa0 [ 31.221066] ? get_unmapped_area+0x1f5/0x3f0 [ 31.221386] do_mmap+0x854/0xf00 [ 31.221636] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.221926] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.222256] ksys_mmap_pgoff+0x3af/0x500 [ 31.222547] do_syscall_64+0x3f/0x90 [ 31.222820] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.223190] RIP: 0033:0x7fb86384ad82 [ 31.223456] 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 [ 31.224691] RSP: 002b:00007ffe5e6330e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.225222] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb86384ad82 [ 31.225730] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb862c84000 [ 31.226220] RBP: 00007fb862c84000 R08: 0000000000000009 R09: 0000000000001000 [ 31.226727] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607184b6ec0 [ 31.227218] R13: 00007ffe5e633100 R14: 00007ffe5e633130 R15: 00007ffe5e633490 [ 31.227708] [ 31.227874] [ 31.228000] Allocated by task 213: [ 31.228253] kasan_save_stack+0x22/0x50 [ 31.228543] kasan_set_track+0x25/0x30 [ 31.228825] __kasan_slab_alloc+0x59/0x70 [ 31.229127] kmem_cache_alloc+0x16b/0x370 [ 31.229443] vm_area_dup+0x20/0x160 [ 31.229706] __split_vma+0x170/0x950 [ 31.229968] split_vma+0xc6/0x110 [ 31.230214] mprotect_fixup+0x8d2/0xb30 [ 31.230497] do_mprotect_pkey+0x87e/0xd40 [ 31.230790] __x64_sys_mprotect+0x78/0xc0 [ 31.231086] do_syscall_64+0x3f/0x90 [ 31.231357] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.231728] [ 31.231850] Freed by task 19: [ 31.232071] kasan_save_stack+0x22/0x50 [ 31.232361] kasan_set_track+0x25/0x30 [ 31.232647] kasan_save_free_info+0x2b/0x50 [ 31.232956] __kasan_slab_free+0x10a/0x190 [ 31.233257] kmem_cache_free+0x10d/0x4d0 [ 31.233558] rcu_core+0x8c8/0x2860 [ 31.233819] __do_softirq+0x1b7/0x7d4 [ 31.234089] [ 31.234213] Last potentially related work creation: [ 31.234555] kasan_save_stack+0x22/0x50 [ 31.234841] __kasan_record_aux_stack+0x8e/0xa0 [ 31.235176] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.235548] remove_vma+0x139/0x170 [ 31.235809] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.236123] do_vmi_munmap+0x1f1/0x2b0 [ 31.236402] __vm_munmap+0x138/0x3a0 [ 31.236666] __x64_sys_munmap+0x59/0x80 [ 31.236957] do_syscall_64+0x3f/0x90 [ 31.237233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.237615] [ 31.237737] The buggy address belongs to the object at ffff88800f653740 [ 31.237737] which belongs to the cache vm_area_struct of size 168 [ 31.238579] The buggy address is located 88 bytes inside of [ 31.238579] freed 168-byte region [ffff88800f653740, ffff88800f6537e8) [ 31.239382] [ 31.239507] The buggy address belongs to the physical page: [ 31.239887] page:0000000071197437 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf653 [ 31.240500] memcg:ffff888016ec2b01 [ 31.240750] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.241115] page_type: 0xffffffff() [ 31.241386] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.241905] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ec2b01 [ 31.242409] page dumped because: kasan: bad access detected [ 31.242781] [ 31.242909] Memory state around the buggy address: [ 31.243243] ffff88800f653680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.243731] ffff88800f653700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.244232] >ffff88800f653780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.244721] ^ [ 31.245001] ffff88800f653800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.245500] ffff88800f653880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.245992] ================================================================== [ 31.246570] Disabling lock debugging due to kernel taint [ 33.169643] BUG: Bad rss-counter state mm:00000000d23a389f type:MM_FILEPAGES val:33 [ 33.170840] BUG: Bad rss-counter state mm:00000000d23a389f type:MM_ANONPAGES val:22 [ 33.637658] BUG: Bad rss-counter state mm:0000000010c5fb63 type:MM_FILEPAGES val:33 [ 33.639309] BUG: Bad rss-counter state mm:0000000010c5fb63 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52489' (ECDSA) to the list of known hosts. 2023/06/21 06:41:56 fuzzer started 2023/06/21 06:41:56 dialing manager at localhost:36067 2023/06/21 06:41:56 checking machine... 2023/06/21 06:41:56 checking revisions... [ 34.370690] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:41:56 testing simple program... [ 34.427393] cgroup: Unknown subsys name 'net' [ 34.466656] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:56 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=00007f849174fda0 CR3=000000000daae000 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=2035353a31343a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a31343a3630203132 XMM08=69767265733d7373616c63742030733a 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=00007f5b4039d618 CR3=000000000ea30000 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=31343a3630203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303435 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000