syzkaller login: [ 30.168070] BUG: Bad rss-counter state mm:000000009f5145bb type:MM_FILEPAGES val:33 [ 30.169365] BUG: Bad rss-counter state mm:000000009f5145bb type:MM_ANONPAGES val:22 [ 30.334064] ================================================================== [ 30.335000] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.335975] Read of size 8 at addr ffff88800e001ed8 by task sshd/221 [ 30.336897] [ 30.337123] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.338018] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.339005] Call Trace: [ 30.339347] [ 30.339648] dump_stack_lvl+0x91/0xf0 [ 30.340170] print_report+0xcc/0x620 [ 30.340674] ? __virt_addr_valid+0x102/0x340 [ 30.341270] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.341910] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.342570] kasan_report+0xbe/0xf0 [ 30.343082] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.343730] vma_interval_tree_remove+0xc75/0xec0 [ 30.344366] vma_prepare+0xc54/0x11a0 [ 30.344896] __split_vma+0x5af/0x950 [ 30.345403] ? __pfx___split_vma+0x10/0x10 [ 30.345958] ? find_held_lock+0x2c/0x110 [ 30.346504] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.347099] ? lock_is_held_type+0x9f/0x120 [ 30.347662] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.348295] ? mtree_range_walk+0x632/0x900 [ 30.348882] ? mas_walk+0x5c7/0x7c0 [ 30.349391] do_vmi_munmap+0x1f1/0x2b0 [ 30.349914] mmap_region+0x1f9/0x2660 [ 30.350431] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.350978] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.351741] ? __pfx_lock_acquire+0x10/0x10 [ 30.352314] ? __pfx_mmap_region+0x10/0x10 [ 30.352903] ? security_mmap_addr+0x7d/0xa0 [ 30.353473] ? get_unmapped_area+0x1f5/0x3f0 [ 30.354061] do_mmap+0x854/0xf00 [ 30.354534] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.355073] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.355680] ksys_mmap_pgoff+0x3af/0x500 [ 30.356221] do_syscall_64+0x3f/0x90 [ 30.356755] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.357461] RIP: 0033:0x7f1e69d0dd82 [ 30.357952] 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 [ 30.360168] RSP: 002b:00007fff998b5bd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.361144] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1e69d0dd82 [ 30.362048] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1e69147000 [ 30.362942] RBP: 00007f1e69147000 R08: 0000000000000009 R09: 0000000000001000 [ 30.363834] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557bf87c8ec0 [ 30.364722] R13: 00007fff998b5bf0 R14: 00007fff998b5c20 R15: 00007fff998b5f80 [ 30.365635] [ 30.365945] [ 30.366168] Allocated by task 214: [ 30.366627] kasan_save_stack+0x22/0x50 [ 30.367176] kasan_set_track+0x25/0x30 [ 30.367701] __kasan_slab_alloc+0x59/0x70 [ 30.368257] kmem_cache_alloc+0x16b/0x370 [ 30.368825] vm_area_dup+0x20/0x160 [ 30.369313] __split_vma+0x170/0x950 [ 30.369813] split_vma+0xc6/0x110 [ 30.370292] mprotect_fixup+0x8d2/0xb30 [ 30.370835] do_mprotect_pkey+0x87e/0xd40 [ 30.371393] __x64_sys_mprotect+0x78/0xc0 [ 30.371939] do_syscall_64+0x3f/0x90 [ 30.372443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.373152] [ 30.373380] Freed by task 214: [ 30.373797] kasan_save_stack+0x22/0x50 [ 30.374319] kasan_set_track+0x25/0x30 [ 30.374835] kasan_save_free_info+0x2b/0x50 [ 30.375406] __kasan_slab_free+0x10a/0x190 [ 30.375964] kmem_cache_free+0x10d/0x4d0 [ 30.376514] rcu_core+0x8c8/0x2860 [ 30.376994] __do_softirq+0x1b7/0x7d4 [ 30.377502] [ 30.377729] Last potentially related work creation: [ 30.378338] kasan_save_stack+0x22/0x50 [ 30.378878] __kasan_record_aux_stack+0x8e/0xa0 [ 30.379494] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.380178] remove_vma+0x139/0x170 [ 30.380660] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.381271] do_vmi_munmap+0x1f1/0x2b0 [ 30.381781] __vm_munmap+0x138/0x3a0 [ 30.382276] __x64_sys_munmap+0x59/0x80 [ 30.382799] do_syscall_64+0x3f/0x90 [ 30.383301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.383988] [ 30.384218] The buggy address belongs to the object at ffff88800e001e80 [ 30.384218] which belongs to the cache vm_area_struct of size 168 [ 30.385770] The buggy address is located 88 bytes inside of [ 30.385770] freed 168-byte region [ffff88800e001e80, ffff88800e001f28) [ 30.387253] [ 30.387484] The buggy address belongs to the physical page: [ 30.388170] page:00000000e2f506de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe001 [ 30.389336] memcg:ffff888019de9c01 [ 30.389777] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.390461] page_type: 0xffffffff() [ 30.390935] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.391910] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019de9c01 [ 30.392891] page dumped because: kasan: bad access detected [ 30.393582] [ 30.393809] Memory state around the buggy address: [ 30.394430] ffff88800e001d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.395323] ffff88800e001e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.396251] >ffff88800e001e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.397172] ^ [ 30.397948] ffff88800e001f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.398859] ffff88800e001f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.399770] ================================================================== [ 30.400805] Disabling lock debugging due to kernel taint [ 32.255025] BUG: Bad rss-counter state mm:0000000079cc635c type:MM_FILEPAGES val:33 [ 32.256198] BUG: Bad rss-counter state mm:0000000079cc635c type:MM_ANONPAGES val:22 [ 32.742643] BUG: Bad rss-counter state mm:00000000cc757ed8 type:MM_FILEPAGES val:33 [ 32.743887] BUG: Bad rss-counter state mm:00000000cc757ed8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31592' (ECDSA) to the list of known hosts. 2023/06/21 06:06:25 fuzzer started 2023/06/21 06:06:26 dialing manager at localhost:36067 2023/06/21 06:06:26 checking machine... 2023/06/21 06:06:26 checking revisions... [ 33.362919] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:06:26 testing simple program... [ 33.409671] cgroup: Unknown subsys name 'net' [ 33.451990] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:06:25 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff11003211f7b RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff888017fa3a60 RBP=ffff888017fa3680 RSP=ffff88801908fb90 R8 =0000000000000000 R9 =ffff888017fa3a60 R10=ffffffff85d3d347 R11=0000000000000000 R12=0000000000000202 R13=ffff888017fa3f90 R14=ffff888017fa3694 R15=ffff88806ce39500 RIP=ffffffff8180fea4 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 00007f485cf7b700 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=00007fc98427d000 CR3=000000000dfa6000 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=36303a3630203132206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38313333332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383133 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85df3b48 RCX=ffffffff81741110 RDX=0000000000000000 RSI=ffffffff86129742 RDI=ffffffff85df3b40 RBP=ffffffff85df3b48 RSP=ffff88800fccef00 R8 =ffffffff86129742 R9 =ffff88800fcceff8 R10=0000000000038001 R11=000000000001e45f R12=ffffffff85df3b48 R13=ffffffff85df3b40 R14=ffffffff85df3b44 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007f75377e3900 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=00007f75377a8008 CR3=000000000f342000 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=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