syzkaller login: [ 32.370177] BUG: Bad rss-counter state mm:00000000c5bbe187 type:MM_FILEPAGES val:33 [ 32.371629] BUG: Bad rss-counter state mm:00000000c5bbe187 type:MM_ANONPAGES val:22 [ 32.548902] ================================================================== [ 32.549790] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.550717] Read of size 8 at addr ffff88801596fb38 by task sshd/221 [ 32.551701] [ 32.551996] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.552889] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.553859] Call Trace: [ 32.554182] [ 32.554460] dump_stack_lvl+0x91/0xf0 [ 32.554939] print_report+0xcc/0x620 [ 32.555422] ? __virt_addr_valid+0x102/0x340 [ 32.555966] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.556578] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.557191] kasan_report+0xbe/0xf0 [ 32.557649] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.558263] vma_interval_tree_remove+0xc75/0xec0 [ 32.558850] vma_prepare+0xc54/0x11a0 [ 32.559321] __split_vma+0x5af/0x950 [ 32.559774] ? __pfx___split_vma+0x10/0x10 [ 32.560322] ? find_held_lock+0x2c/0x110 [ 32.560826] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.561388] ? lock_is_held_type+0x9f/0x120 [ 32.561909] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.562501] ? mtree_range_walk+0x632/0x900 [ 32.563027] ? mas_walk+0x5c7/0x7c0 [ 32.563493] do_vmi_munmap+0x1f1/0x2b0 [ 32.563979] mmap_region+0x1f9/0x2660 [ 32.564459] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.564952] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.565646] ? __pfx_lock_acquire+0x10/0x10 [ 32.566180] ? __pfx_mmap_region+0x10/0x10 [ 32.566687] ? security_mmap_addr+0x7d/0xa0 [ 32.567207] ? get_unmapped_area+0x1f5/0x3f0 [ 32.567736] do_mmap+0x854/0xf00 [ 32.568191] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.568665] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.569224] ksys_mmap_pgoff+0x3af/0x500 [ 32.569711] do_syscall_64+0x3f/0x90 [ 32.570185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.570805] RIP: 0033:0x7f08fdd5cd82 [ 32.571260] 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 [ 32.573346] RSP: 002b:00007ffeb6cb6188 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.574228] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f08fdd5cd82 [ 32.575041] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f08fd196000 [ 32.575867] RBP: 00007f08fd196000 R08: 0000000000000009 R09: 0000000000001000 [ 32.576689] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e9b0643f70 [ 32.577514] R13: 00007ffeb6cb61a0 R14: 00007ffeb6cb61d0 R15: 00007ffeb6cb6530 [ 32.578355] [ 32.578640] [ 32.578848] Allocated by task 214: [ 32.579271] kasan_save_stack+0x22/0x50 [ 32.579760] kasan_set_track+0x25/0x30 [ 32.580281] __kasan_slab_alloc+0x59/0x70 [ 32.580781] kmem_cache_alloc+0x16b/0x370 [ 32.581299] vm_area_dup+0x20/0x160 [ 32.581733] __split_vma+0x170/0x950 [ 32.582192] split_vma+0xc6/0x110 [ 32.582609] mprotect_fixup+0x8d2/0xb30 [ 32.583100] do_mprotect_pkey+0x87e/0xd40 [ 32.583606] __x64_sys_mprotect+0x78/0xc0 [ 32.584133] do_syscall_64+0x3f/0x90 [ 32.584588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.585212] [ 32.585426] Freed by task 13: [ 32.585793] kasan_save_stack+0x22/0x50 [ 32.586301] kasan_set_track+0x25/0x30 [ 32.586776] kasan_save_free_info+0x2b/0x50 [ 32.587301] __kasan_slab_free+0x10a/0x190 [ 32.587822] kmem_cache_free+0x10d/0x4d0 [ 32.588327] rcu_core+0x8c8/0x2860 [ 32.588754] __do_softirq+0x1b7/0x7d4 [ 32.589223] [ 32.589427] Last potentially related work creation: [ 32.589976] kasan_save_stack+0x22/0x50 [ 32.590508] __kasan_record_aux_stack+0x8e/0xa0 [ 32.591064] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.591693] remove_vma+0x139/0x170 [ 32.592175] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.592864] do_vmi_munmap+0x1f1/0x2b0 [ 32.593346] __vm_munmap+0x138/0x3a0 [ 32.593789] __x64_sys_munmap+0x59/0x80 [ 32.594274] do_syscall_64+0x3f/0x90 [ 32.594721] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.595342] [ 32.595549] The buggy address belongs to the object at ffff88801596fae0 [ 32.595549] which belongs to the cache vm_area_struct of size 168 [ 32.596958] The buggy address is located 88 bytes inside of [ 32.596958] freed 168-byte region [ffff88801596fae0, ffff88801596fb88) [ 32.598307] [ 32.598513] The buggy address belongs to the physical page: [ 32.599151] page:000000005b0d5720 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1596f [ 32.600196] memcg:ffff888017eeb201 [ 32.600599] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.601221] page_type: 0xffffffff() [ 32.601647] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.602527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017eeb201 [ 32.603400] page dumped because: kasan: bad access detected [ 32.604041] [ 32.604255] Memory state around the buggy address: [ 32.604803] ffff88801596fa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.605620] ffff88801596fa80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.606435] >ffff88801596fb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.607248] ^ [ 32.607835] ffff88801596fb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.608653] ffff88801596fc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.609470] ================================================================== [ 32.610365] Disabling lock debugging due to kernel taint [ 34.649940] BUG: Bad rss-counter state mm:00000000bbb7dab1 type:MM_FILEPAGES val:33 [ 34.650722] BUG: Bad rss-counter state mm:00000000bbb7dab1 type:MM_ANONPAGES val:22 [ 35.054563] BUG: Bad rss-counter state mm:000000004a8497ca type:MM_FILEPAGES val:33 [ 35.055289] BUG: Bad rss-counter state mm:000000004a8497ca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62686' (ECDSA) to the list of known hosts. 2023/06/19 16:48:28 fuzzer started 2023/06/19 16:48:28 dialing manager at localhost:44161 2023/06/19 16:48:28 checking machine... 2023/06/19 16:48:28 checking revisions... [ 35.720863] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:48:28 testing simple program... [ 35.786319] cgroup: Unknown subsys name 'net' [ 35.857599] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:48:27 Registers: info registers vcpu 0 RAX=ffff888019ea0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888019e9f001 RSI=ffff888019e9f0e8 RDI=ffff888019e9ed68 RBP=ffff888019e9edb0 RSP=ffff888019e9ece0 R8 =0000000000000001 R9 =ffff888019e9ed98 R10=0000000000038001 R11=000000000000fc0f R12=ffff888019e9edb8 R13=ffff888019e9eda0 R14=ffff888019e9f0e8 R15=ffff888019e9ed58 RIP=ffffffff811304d5 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 00007f77d3da2900 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=000056060aa6a380 CR3=0000000009820000 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=000000000000000c RBX=ffffffff85d8d58c RCX=ffffffff8110261e RDX=0000000000000000 RSI=ffffffff86090648 RDI=ffffffff85d8d57c RBP=ffffffff85d8d57c RSP=ffff88806cf099c0 R8 =ffffffff86090648 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=000000000000506a R12=ffffffff85d8d588 R13=ffffffff85d8d57c R14=ffffffff85d8d57c R15=dffffc0000000000 RIP=ffffffff8112fc5d RFL=00000216 [----AP-] 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=00007f19a8423e80 CR3=0000000015b68000 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=2038323a38343a3631203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a38343a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000