syzkaller login: [ 31.126777] BUG: Bad rss-counter state mm:00000000a25ad80c type:MM_FILEPAGES val:33 [ 31.127974] BUG: Bad rss-counter state mm:00000000a25ad80c type:MM_ANONPAGES val:22 [ 31.166768] ================================================================== [ 31.167751] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.168849] Read of size 8 at addr ffff88800fc146b0 by task sshd/220 [ 31.169657] [ 31.169891] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.170808] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.171839] Call Trace: [ 31.172182] [ 31.172490] dump_stack_lvl+0x91/0xf0 [ 31.173021] print_report+0xcc/0x620 [ 31.173536] ? __virt_addr_valid+0x102/0x340 [ 31.174133] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.174821] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.175513] kasan_report+0xbe/0xf0 [ 31.176082] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.176824] vma_interval_tree_remove+0xc75/0xec0 [ 31.177540] vma_prepare+0xc54/0x11a0 [ 31.178111] __split_vma+0x5af/0x950 [ 31.178686] ? __pfx___split_vma+0x10/0x10 [ 31.179315] ? find_held_lock+0x2c/0x110 [ 31.179932] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.180603] ? lock_is_held_type+0x9f/0x120 [ 31.181244] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.181962] ? mtree_range_walk+0x632/0x900 [ 31.182638] ? mas_walk+0x5c7/0x7c0 [ 31.183204] do_vmi_munmap+0x1f1/0x2b0 [ 31.183789] mmap_region+0x1f9/0x2660 [ 31.184367] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.184977] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.185828] ? __pfx_lock_acquire+0x10/0x10 [ 31.186483] ? __pfx_mmap_region+0x10/0x10 [ 31.187118] ? security_mmap_addr+0x7d/0xa0 [ 31.187748] ? get_unmapped_area+0x1f5/0x3f0 [ 31.188402] do_mmap+0x854/0xf00 [ 31.188923] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.189510] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.190182] ksys_mmap_pgoff+0x3af/0x500 [ 31.190788] do_syscall_64+0x3f/0x90 [ 31.191360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.192129] RIP: 0033:0x7f85614f8d82 [ 31.192639] 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 [ 31.195020] RSP: 002b:00007ffc47af6b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.196030] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f85614f8d82 [ 31.196969] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8560932000 [ 31.197912] RBP: 00007f8560932000 R08: 0000000000000009 R09: 0000000000001000 [ 31.198875] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e6ab6dec0 [ 31.199819] R13: 00007ffc47af6ba0 R14: 00007ffc47af6bd0 R15: 00007ffc47af6f30 [ 31.200773] [ 31.201098] [ 31.201335] Allocated by task 213: [ 31.201812] kasan_save_stack+0x22/0x50 [ 31.202381] kasan_set_track+0x25/0x30 [ 31.202930] __kasan_slab_alloc+0x59/0x70 [ 31.203510] kmem_cache_alloc+0x16b/0x370 [ 31.204085] vm_area_dup+0x20/0x160 [ 31.204592] __split_vma+0x170/0x950 [ 31.205113] split_vma+0xc6/0x110 [ 31.205599] mprotect_fixup+0x8d2/0xb30 [ 31.206166] do_mprotect_pkey+0x87e/0xd40 [ 31.206753] __x64_sys_mprotect+0x78/0xc0 [ 31.207333] do_syscall_64+0x3f/0x90 [ 31.207858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.208569] [ 31.208809] Freed by task 213: [ 31.209249] kasan_save_stack+0x22/0x50 [ 31.209809] kasan_set_track+0x25/0x30 [ 31.210375] kasan_save_free_info+0x2b/0x50 [ 31.210971] __kasan_slab_free+0x10a/0x190 [ 31.211567] kmem_cache_free+0x10d/0x4d0 [ 31.212135] rcu_core+0x8c8/0x2860 [ 31.212628] __do_softirq+0x1b7/0x7d4 [ 31.213158] [ 31.213398] Last potentially related work creation: [ 31.214053] kasan_save_stack+0x22/0x50 [ 31.214627] __kasan_record_aux_stack+0x8e/0xa0 [ 31.215268] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.215976] remove_vma+0x139/0x170 [ 31.216479] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.217095] do_vmi_munmap+0x1f1/0x2b0 [ 31.217636] __vm_munmap+0x138/0x3a0 [ 31.218166] __x64_sys_munmap+0x59/0x80 [ 31.218721] do_syscall_64+0x3f/0x90 [ 31.219245] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.219961] [ 31.220200] The buggy address belongs to the object at ffff88800fc14658 [ 31.220200] which belongs to the cache vm_area_struct of size 168 [ 31.221844] The buggy address is located 88 bytes inside of [ 31.221844] freed 168-byte region [ffff88800fc14658, ffff88800fc14700) [ 31.223432] [ 31.223672] The buggy address belongs to the physical page: [ 31.224412] page:00000000935c91fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfc14 [ 31.225628] memcg:ffff888018f56701 [ 31.226105] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.226892] page_type: 0xffffffff() [ 31.227393] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 dead000000000001 [ 31.228412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f56701 [ 31.229426] page dumped because: kasan: bad access detected [ 31.230185] [ 31.230422] Memory state around the buggy address: [ 31.231070] ffff88800fc14580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.232024] ffff88800fc14600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.232984] >ffff88800fc14680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.233940] ^ [ 31.234605] ffff88800fc14700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 31.235549] ffff88800fc14780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.236491] ================================================================== [ 31.237682] Disabling lock debugging due to kernel taint [ 33.407992] BUG: Bad rss-counter state mm:00000000703172a0 type:MM_FILEPAGES val:33 [ 33.409147] BUG: Bad rss-counter state mm:00000000703172a0 type:MM_ANONPAGES val:22 [ 33.858915] BUG: Bad rss-counter state mm:000000009ea0956b type:MM_FILEPAGES val:33 [ 33.859907] BUG: Bad rss-counter state mm:000000009ea0956b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11699' (ECDSA) to the list of known hosts. 2023/06/21 02:52:09 fuzzer started 2023/06/21 02:52:09 dialing manager at localhost:36067 2023/06/21 02:52:09 checking machine... 2023/06/21 02:52:09 checking revisions... [ 34.556655] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:52:10 testing simple program... [ 34.607096] cgroup: Unknown subsys name 'net' [ 34.642857] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:52:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fc3595fa598 RCX=0000000000000000 RDX=0000000000000001 RSI=00007fc35a1a7740 RDI=00007fc3595fb000 RBP=00007fc3595fb000 RSP=00007ffea8503070 R8 =00005586d2de80d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=00005586d2e07810 R13=00007fc359bd0ae8 R14=0000000000000020 R15=0000000000000000 RIP=00007fc359a4ea2d RFL=00010246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fc35961c900 00000000 00000000 GS =0000 0000000000000000 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=00007fc359bd0ae8 CR3=0000000016b4a000 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=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 info registers vcpu 1 RAX=0000000080010001 RBX=ffffffff813fc540 RCX=ffffffff813fc57d RDX=ffff888008d951c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88806cf2c250 RSP=ffff88806cf09e10 R8 =0000000000000007 R9 =0000000000000000 R10=ffff888008e07dc8 R11=ffff88806cf09ff8 R12=00000007d9de7b9f R13=ffff88806cf2c240 R14=ffff888008e07dc8 R15=dffffc0000000000 RIP=ffffffff814c0860 RFL=00000082 [--S----] 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 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=00007fecf0584b80 CR3=0000000016af2000 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=2039303a32353a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a32353a3230203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000