syzkaller login: [ 69.878142] BUG: Bad rss-counter state mm:00000000e8289203 type:MM_FILEPAGES val:33 [ 69.879575] BUG: Bad rss-counter state mm:00000000e8289203 type:MM_ANONPAGES val:22 [ 70.058110] ================================================================== [ 70.059163] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 70.060235] Read of size 8 at addr ffff88800e8c4140 by task sshd/220 [ 70.061103] [ 70.061337] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 70.062468] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 70.063503] Call Trace: [ 70.063845] [ 70.064147] dump_stack_lvl+0x91/0xf0 [ 70.064674] print_report+0xcc/0x620 [ 70.065202] ? __virt_addr_valid+0x102/0x340 [ 70.065794] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.066458] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.067133] kasan_report+0xbe/0xf0 [ 70.067660] ? vma_interval_tree_remove+0xc75/0xec0 [ 70.068351] vma_interval_tree_remove+0xc75/0xec0 [ 70.069031] vma_prepare+0xc54/0x11a0 [ 70.069562] __split_vma+0x5af/0x950 [ 70.070104] ? __pfx___split_vma+0x10/0x10 [ 70.070693] ? find_held_lock+0x2c/0x110 [ 70.071270] do_vmi_align_munmap+0x2ba/0x11f0 [ 70.071895] ? lock_is_held_type+0x9f/0x120 [ 70.072487] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 70.073159] ? mtree_range_walk+0x632/0x900 [ 70.073772] ? mas_walk+0x5c7/0x7c0 [ 70.074307] do_vmi_munmap+0x1f1/0x2b0 [ 70.074852] mmap_region+0x1f9/0x2660 [ 70.075390] ? vm_mmap_pgoff+0x15c/0x3a0 [ 70.075963] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 70.076755] ? __pfx_lock_acquire+0x10/0x10 [ 70.077349] ? __pfx_mmap_region+0x10/0x10 [ 70.077943] ? security_mmap_addr+0x7d/0xa0 [ 70.078544] ? get_unmapped_area+0x1f5/0x3f0 [ 70.079171] do_mmap+0x854/0xf00 [ 70.079653] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.080195] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 70.080803] ksys_mmap_pgoff+0x3af/0x500 [ 70.081374] do_syscall_64+0x3f/0x90 [ 70.081887] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.082591] RIP: 0033:0x7f23cea09d82 [ 70.083084] 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 [ 70.085448] RSP: 002b:00007ffcb518f2d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 70.086455] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23cea09d82 [ 70.087313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23cde43000 [ 70.088169] RBP: 00007f23cde43000 R08: 0000000000000009 R09: 0000000000001000 [ 70.089020] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bba658cd90 [ 70.089917] R13: 00007ffcb518f2f0 R14: 00007ffcb518f320 R15: 00007ffcb518f680 [ 70.090879] [ 70.091208] [ 70.091446] Allocated by task 213: [ 70.091922] kasan_save_stack+0x22/0x50 [ 70.092486] kasan_set_track+0x25/0x30 [ 70.093040] __kasan_slab_alloc+0x59/0x70 [ 70.093624] kmem_cache_alloc+0x16b/0x370 [ 70.094224] vm_area_dup+0x20/0x160 [ 70.094727] __split_vma+0x170/0x950 [ 70.095249] split_vma+0xc6/0x110 [ 70.095738] mprotect_fixup+0x8d2/0xb30 [ 70.096302] do_mprotect_pkey+0x87e/0xd40 [ 70.096881] __x64_sys_mprotect+0x78/0xc0 [ 70.097465] do_syscall_64+0x3f/0x90 [ 70.098003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.098720] [ 70.098958] Freed by task 213: [ 70.099395] kasan_save_stack+0x22/0x50 [ 70.099952] kasan_set_track+0x25/0x30 [ 70.100507] kasan_save_free_info+0x2b/0x50 [ 70.101099] __kasan_slab_free+0x10a/0x190 [ 70.101689] kmem_cache_free+0x10d/0x4d0 [ 70.102270] rcu_core+0x8c8/0x2860 [ 70.102761] __do_softirq+0x1b7/0x7d4 [ 70.103291] [ 70.103528] Last potentially related work creation: [ 70.104182] kasan_save_stack+0x22/0x50 [ 70.104743] __kasan_record_aux_stack+0x8e/0xa0 [ 70.105379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.106120] remove_vma+0x139/0x170 [ 70.106623] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.107244] do_vmi_munmap+0x1f1/0x2b0 [ 70.107783] __vm_munmap+0x138/0x3a0 [ 70.108304] __x64_sys_munmap+0x59/0x80 [ 70.108862] do_syscall_64+0x3f/0x90 [ 70.109385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.110105] [ 70.110342] Second to last potentially related work creation: [ 70.111101] kasan_save_stack+0x22/0x50 [ 70.111659] __kasan_record_aux_stack+0x8e/0xa0 [ 70.112301] __call_rcu_common.constprop.0+0x6a/0xb90 [ 70.113014] remove_vma+0x139/0x170 [ 70.113516] do_vmi_align_munmap+0xd4a/0x11f0 [ 70.114158] do_vmi_munmap+0x1f1/0x2b0 [ 70.114699] mmap_region+0x1f9/0x2660 [ 70.115230] do_mmap+0x854/0xf00 [ 70.115706] vm_mmap_pgoff+0x1a6/0x3a0 [ 70.116247] ksys_mmap_pgoff+0x3af/0x500 [ 70.116807] do_syscall_64+0x3f/0x90 [ 70.117335] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 70.118051] [ 70.118287] The buggy address belongs to the object at ffff88800e8c40e8 [ 70.118287] which belongs to the cache vm_area_struct of size 168 [ 70.119921] The buggy address is located 88 bytes inside of [ 70.119921] freed 168-byte region [ffff88800e8c40e8, ffff88800e8c4190) [ 70.121490] [ 70.121729] The buggy address belongs to the physical page: [ 70.122482] page:000000000c937949 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8c4 [ 70.123689] memcg:ffff8880134dfa01 [ 70.124162] flags: 0x100000000000200(slab|node=0|zone=1) [ 70.124878] page_type: 0xffffffff() [ 70.125378] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5e40 dead000000000008 [ 70.126400] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880134dfa01 [ 70.127391] page dumped because: kasan: bad access detected [ 70.128113] [ 70.128343] Memory state around the buggy address: [ 70.128973] ffff88800e8c4000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.129897] ffff88800e8c4080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 70.130834] >ffff88800e8c4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 70.131753] ^ [ 70.132469] ffff88800e8c4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 70.133444] ffff88800e8c4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 70.134423] ================================================================== [ 70.135805] Disabling lock debugging due to kernel taint [ 73.180812] BUG: Bad rss-counter state mm:0000000020bf4644 type:MM_FILEPAGES val:33 [ 73.181791] BUG: Bad rss-counter state mm:0000000020bf4644 type:MM_ANONPAGES val:22 [ 73.678195] BUG: Bad rss-counter state mm:000000000b0df3ef type:MM_FILEPAGES val:33 [ 73.679238] BUG: Bad rss-counter state mm:000000000b0df3ef type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26796' (ECDSA) to the list of known hosts. 2023/06/20 09:54:34 fuzzer started 2023/06/20 09:54:35 dialing manager at localhost:44161 2023/06/20 09:54:35 checking machine... 2023/06/20 09:54:35 checking revisions... [ 74.445734] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:54:35 testing simple program... [ 74.501066] cgroup: Unknown subsys name 'net' [ 74.538757] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:53:55 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=000000000000000c RCX=ffffffff8217c62a RDX=ffff888015d90000 RSI=0000000000000000 RDI=0000000000000006 RBP=00007fff5db6971c RSP=ffff88801472fc88 R8 =0000000000000006 R9 =00007fff5db6971c R10=00007fff5db69728 R11=00000000000b6996 R12=ffff88801472fe10 R13=00007fff5db69728 R14=0000000000000000 R15=00007fff5db6971c RIP=ffffffff814c07eb 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 00007f03b7d7d900 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=00007fff5db6a000 CR3=000000000db28000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007f3d879ac590 CR3=000000000caa8000 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=2034333a34353a3930203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a34353a3930203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000