syzkaller login: [ 32.143492] BUG: Bad rss-counter state mm:00000000f271e8b6 type:MM_FILEPAGES val:33 [ 32.144890] BUG: Bad rss-counter state mm:00000000f271e8b6 type:MM_ANONPAGES val:22 [ 32.301656] ================================================================== [ 32.302565] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.303642] Read of size 8 at addr ffff888015802a50 by task sshd/220 [ 32.304410] [ 32.304628] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.305492] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.306484] Call Trace: [ 32.306807] [ 32.307112] dump_stack_lvl+0x91/0xf0 [ 32.307609] print_report+0xcc/0x620 [ 32.308087] ? __virt_addr_valid+0x102/0x340 [ 32.308642] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.309269] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.309962] kasan_report+0xbe/0xf0 [ 32.310492] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.311198] vma_interval_tree_remove+0xc75/0xec0 [ 32.311883] vma_prepare+0xc54/0x11a0 [ 32.312426] __split_vma+0x5af/0x950 [ 32.312965] ? __pfx___split_vma+0x10/0x10 [ 32.313565] ? find_held_lock+0x2c/0x110 [ 32.314160] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.314794] ? lock_is_held_type+0x9f/0x120 [ 32.315423] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.316116] ? mtree_range_walk+0x632/0x900 [ 32.316739] ? mas_walk+0x5c7/0x7c0 [ 32.317278] do_vmi_munmap+0x1f1/0x2b0 [ 32.317779] mmap_region+0x1f9/0x2660 [ 32.318267] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.318779] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.319499] ? __pfx_lock_acquire+0x10/0x10 [ 32.320035] ? __pfx_mmap_region+0x10/0x10 [ 32.320564] ? security_mmap_addr+0x7d/0xa0 [ 32.321094] ? get_unmapped_area+0x1f5/0x3f0 [ 32.321648] do_mmap+0x854/0xf00 [ 32.322091] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.322595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.323179] ksys_mmap_pgoff+0x3af/0x500 [ 32.323689] do_syscall_64+0x3f/0x90 [ 32.324180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.324832] RIP: 0033:0x7fd7bf7c3d82 [ 32.325292] 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 [ 32.327461] RSP: 002b:00007ffdd74a2aa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.328367] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd7bf7c3d82 [ 32.329207] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd7bebfd000 [ 32.330050] RBP: 00007fd7bebfd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.330902] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560e63f53ec0 [ 32.331761] R13: 00007ffdd74a2ac0 R14: 00007ffdd74a2af0 R15: 00007ffdd74a2e50 [ 32.332617] [ 32.332911] [ 32.333127] Allocated by task 213: [ 32.333564] kasan_save_stack+0x22/0x50 [ 32.334068] kasan_set_track+0x25/0x30 [ 32.334574] __kasan_slab_alloc+0x59/0x70 [ 32.335100] kmem_cache_alloc+0x16b/0x370 [ 32.335653] vm_area_dup+0x20/0x160 [ 32.336172] __split_vma+0x170/0x950 [ 32.336699] split_vma+0xc6/0x110 [ 32.337192] mprotect_fixup+0x8d2/0xb30 [ 32.337760] do_mprotect_pkey+0x87e/0xd40 [ 32.338344] __x64_sys_mprotect+0x78/0xc0 [ 32.338933] do_syscall_64+0x3f/0x90 [ 32.339486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.340212] [ 32.340453] Freed by task 213: [ 32.340897] kasan_save_stack+0x22/0x50 [ 32.341466] kasan_set_track+0x25/0x30 [ 32.342027] kasan_save_free_info+0x2b/0x50 [ 32.342627] __kasan_slab_free+0x10a/0x190 [ 32.343249] kmem_cache_free+0x10d/0x4d0 [ 32.343829] rcu_core+0x8c8/0x2860 [ 32.344324] __do_softirq+0x1b7/0x7d4 [ 32.344867] [ 32.345112] Last potentially related work creation: [ 32.345761] kasan_save_stack+0x22/0x50 [ 32.346324] __kasan_record_aux_stack+0x8e/0xa0 [ 32.346962] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.347664] remove_vma+0x139/0x170 [ 32.348123] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.348691] do_vmi_munmap+0x1f1/0x2b0 [ 32.349183] __vm_munmap+0x138/0x3a0 [ 32.349651] __x64_sys_munmap+0x59/0x80 [ 32.350147] do_syscall_64+0x3f/0x90 [ 32.350623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.351288] [ 32.351507] The buggy address belongs to the object at ffff8880158029f8 [ 32.351507] which belongs to the cache vm_area_struct of size 168 [ 32.352989] The buggy address is located 88 bytes inside of [ 32.352989] freed 168-byte region [ffff8880158029f8, ffff888015802aa0) [ 32.354399] [ 32.354615] The buggy address belongs to the physical page: [ 32.355279] page:00000000fdc956b3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15802 [ 32.356372] memcg:ffff88800ef53901 [ 32.356795] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.357433] page_type: 0xffffffff() [ 32.357879] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.358797] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef53901 [ 32.359709] page dumped because: kasan: bad access detected [ 32.360375] [ 32.360608] Memory state around the buggy address: [ 32.361188] ffff888015802900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.362046] ffff888015802980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.362895] >ffff888015802a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.363765] ^ [ 32.364472] ffff888015802a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.365335] ffff888015802b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.366197] ================================================================== [ 32.367178] Disabling lock debugging due to kernel taint [ 33.991250] BUG: Bad rss-counter state mm:000000004ba03684 type:MM_FILEPAGES val:33 [ 33.992000] BUG: Bad rss-counter state mm:000000004ba03684 type:MM_ANONPAGES val:22 [ 34.419685] BUG: Bad rss-counter state mm:000000000dbfddee type:MM_FILEPAGES val:33 [ 34.420487] BUG: Bad rss-counter state mm:000000000dbfddee type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25500' (ECDSA) to the list of known hosts. 2023/06/20 02:00:55 fuzzer started 2023/06/20 02:00:55 dialing manager at localhost:44161 2023/06/20 02:00:56 checking machine... 2023/06/20 02:00:56 checking revisions... [ 35.194183] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:00:56 testing simple program... [ 35.247678] cgroup: Unknown subsys name 'net' [ 35.302704] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:00:53 Registers: info registers vcpu 0 RAX=ffffffff8609fb04 RBX=ffffffff85d978a8 RCX=ffffffff8118ddc2 RDX=0000000000000000 RSI=ffffffff8609fada RDI=ffffffff85d97888 RBP=ffffffff85d978a8 RSP=ffff88806ce099f0 R8 =ffffffff8609fada R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000792d R12=ffffffff85d978a4 R13=ffffffff85d97888 R14=0000000000000007 R15=dffffc0000000000 RIP=ffffffff8112fcb7 RFL=00000286 [--S--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=00007ff778661060 CR3=00000000181ee000 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=2035353a30303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a30303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff81807eba RDX=000000000000807e RSI=000000000000807e RDI=ffffffff86507db8 RBP=ffff88801a0df6f0 RSP=ffff88801a0df628 R8 =0000000000000000 R9 =ffff88801a0df6d8 R10=0000000000038001 R11=0000000000020c48 R12=ffff88801a0df6f8 R13=ffff88801a0df6e0 R14=ffff88801a0df6d9 R15=ffff88801a0df698 RIP=ffffffff811307c2 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 00007fd23f9d2900 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=00007ffedf52e000 CR3=000000000dccc000 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