syzkaller login: [ 28.778518] BUG: Bad rss-counter state mm:00000000e74d97e5 type:MM_FILEPAGES val:33 [ 28.779723] BUG: Bad rss-counter state mm:00000000e74d97e5 type:MM_ANONPAGES val:22 [ 28.819016] ================================================================== [ 28.820277] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.821647] Read of size 8 at addr ffff888019baca50 by task sshd/220 [ 28.822716] [ 28.822980] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.824171] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.825433] Call Trace: [ 28.825857] [ 28.826246] dump_stack_lvl+0x91/0xf0 [ 28.826834] print_report+0xcc/0x620 [ 28.827418] ? __virt_addr_valid+0x102/0x340 [ 28.828108] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.828868] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.829649] kasan_report+0xbe/0xf0 [ 28.830245] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.831018] vma_interval_tree_remove+0xc75/0xec0 [ 28.831769] vma_prepare+0xc54/0x11a0 [ 28.832379] __split_vma+0x5af/0x950 [ 28.832963] ? __pfx___split_vma+0x10/0x10 [ 28.833619] ? find_held_lock+0x2c/0x110 [ 28.834272] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.834987] ? lock_is_held_type+0x9f/0x120 [ 28.835676] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.836459] ? mtree_range_walk+0x632/0x900 [ 28.837044] ? mas_walk+0x5c7/0x7c0 [ 28.837532] do_vmi_munmap+0x1f1/0x2b0 [ 28.838029] mmap_region+0x1f9/0x2660 [ 28.838521] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.839056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.839772] ? __pfx_lock_acquire+0x10/0x10 [ 28.840326] ? __pfx_mmap_region+0x10/0x10 [ 28.840862] ? security_mmap_addr+0x7d/0xa0 [ 28.841405] ? get_unmapped_area+0x1f5/0x3f0 [ 28.841969] do_mmap+0x854/0xf00 [ 28.842410] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.842902] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.843475] ksys_mmap_pgoff+0x3af/0x500 [ 28.843992] do_syscall_64+0x3f/0x90 [ 28.844478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.845148] RIP: 0033:0x7f8335f2fd82 [ 28.845614] 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 [ 28.847774] RSP: 002b:00007fff8b3446c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.848704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8335f2fd82 [ 28.849576] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8335369000 [ 28.850428] RBP: 00007f8335369000 R08: 0000000000000009 R09: 0000000000001000 [ 28.851284] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559bfef5ff60 [ 28.852150] R13: 00007fff8b3446e0 R14: 00007fff8b344710 R15: 00007fff8b344a70 [ 28.853024] [ 28.853320] [ 28.853540] Allocated by task 213: [ 28.853975] kasan_save_stack+0x22/0x50 [ 28.854488] kasan_set_track+0x25/0x30 [ 28.854991] __kasan_slab_alloc+0x59/0x70 [ 28.855528] kmem_cache_alloc+0x16b/0x370 [ 28.856063] vm_area_dup+0x20/0x160 [ 28.856518] __split_vma+0x170/0x950 [ 28.856997] split_vma+0xc6/0x110 [ 28.857438] mprotect_fixup+0x8d2/0xb30 [ 28.857941] do_mprotect_pkey+0x87e/0xd40 [ 28.858463] __x64_sys_mprotect+0x78/0xc0 [ 28.858990] do_syscall_64+0x3f/0x90 [ 28.859465] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.860128] [ 28.860347] Freed by task 213: [ 28.860746] kasan_save_stack+0x22/0x50 [ 28.861271] kasan_set_track+0x25/0x30 [ 28.861769] kasan_save_free_info+0x2b/0x50 [ 28.862321] __kasan_slab_free+0x10a/0x190 [ 28.862904] kmem_cache_free+0x10d/0x4d0 [ 28.863418] rcu_core+0x8c8/0x2860 [ 28.863872] __do_softirq+0x1b7/0x7d4 [ 28.864386] [ 28.864602] Last potentially related work creation: [ 28.865202] kasan_save_stack+0x22/0x50 [ 28.865729] __kasan_record_aux_stack+0x8e/0xa0 [ 28.866313] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.866972] remove_vma+0x139/0x170 [ 28.867434] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.868001] do_vmi_munmap+0x1f1/0x2b0 [ 28.868504] __vm_munmap+0x138/0x3a0 [ 28.868984] __x64_sys_munmap+0x59/0x80 [ 28.869492] do_syscall_64+0x3f/0x90 [ 28.869976] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.870640] [ 28.870861] The buggy address belongs to the object at ffff888019bac9f8 [ 28.870861] which belongs to the cache vm_area_struct of size 168 [ 28.872358] The buggy address is located 88 bytes inside of [ 28.872358] freed 168-byte region [ffff888019bac9f8, ffff888019bacaa0) [ 28.873802] [ 28.874023] The buggy address belongs to the physical page: [ 28.874690] page:0000000000422cf9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19bac [ 28.875789] memcg:ffff88801964f801 [ 28.876226] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.876877] page_type: 0xffffffff() [ 28.877342] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 28.878293] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801964f801 [ 28.879224] page dumped because: kasan: bad access detected [ 28.879889] [ 28.880119] Memory state around the buggy address: [ 28.880716] ffff888019bac900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.881600] ffff888019bac980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 28.882461] >ffff888019baca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.883334] ^ [ 28.884058] ffff888019baca80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 28.884942] ffff888019bacb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.885807] ================================================================== [ 28.886778] Disabling lock debugging due to kernel taint [ 31.546203] BUG: Bad rss-counter state mm:0000000084165302 type:MM_FILEPAGES val:33 [ 31.547191] BUG: Bad rss-counter state mm:0000000084165302 type:MM_ANONPAGES val:22 [ 31.926108] BUG: Bad rss-counter state mm:0000000012dce22a type:MM_FILEPAGES val:33 [ 31.926802] BUG: Bad rss-counter state mm:0000000012dce22a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22986' (ECDSA) to the list of known hosts. 2023/06/21 04:36:46 fuzzer started 2023/06/21 04:36:46 dialing manager at localhost:36067 2023/06/21 04:36:46 checking machine... 2023/06/21 04:36:46 checking revisions... [ 32.581380] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:36:46 testing simple program... [ 32.633756] cgroup: Unknown subsys name 'net' [ 32.696974] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:36:46 Registers: info registers vcpu 0 RAX=0000607f92e0d800 RBX=ffff8880103fed00 RCX=0000000000000000 RDX=1ffff1100207fda0 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88806ce09da0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000288 R13=ffffffff87b6a200 R14=ffff88800d8ea480 R15=ffff88806ce361e0 RIP=ffffffff81827b79 RFL=00000046 [---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 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=00007f2020666dc0 CR3=000000000c566000 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=2035343a36333a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a36333a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff8170aaaf RDX=ffff88800c550000 RSI=0000000000000000 RDI=0000000000000007 RBP=1ffff11002d68f6d RSP=ffff888016b47b60 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff88800f18c488 R13=0000556933fab000 R14=800000001b0dc065 R15=0000000000000000 RIP=ffffffff8170aaaf 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1dcf570900 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=0000556933fabc9c CR3=000000000fd38000 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