syzkaller login: [ 32.046502] BUG: Bad rss-counter state mm:00000000cbdff5bd type:MM_FILEPAGES val:33 [ 32.047693] BUG: Bad rss-counter state mm:00000000cbdff5bd type:MM_ANONPAGES val:22 [ 32.086204] ================================================================== [ 32.087222] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.088164] Read of size 8 at addr ffff888015f22a50 by task sshd/219 [ 32.088937] [ 32.089161] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.090009] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.090990] Call Trace: [ 32.091315] [ 32.091597] dump_stack_lvl+0x91/0xf0 [ 32.092094] print_report+0xcc/0x620 [ 32.092588] ? __virt_addr_valid+0x102/0x340 [ 32.093134] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.093754] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.094381] kasan_report+0xbe/0xf0 [ 32.094862] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.095510] vma_interval_tree_remove+0xc75/0xec0 [ 32.096137] vma_prepare+0xc54/0x11a0 [ 32.096625] __split_vma+0x5af/0x950 [ 32.097095] ? __pfx___split_vma+0x10/0x10 [ 32.097627] ? find_held_lock+0x2c/0x110 [ 32.098157] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.098725] ? lock_is_held_type+0x9f/0x120 [ 32.099284] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.099893] ? mtree_range_walk+0x632/0x900 [ 32.100442] ? mas_walk+0x5c7/0x7c0 [ 32.100915] do_vmi_munmap+0x1f1/0x2b0 [ 32.101404] mmap_region+0x1f9/0x2660 [ 32.101885] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.102394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.103104] ? __pfx_lock_acquire+0x10/0x10 [ 32.103645] ? __pfx_mmap_region+0x10/0x10 [ 32.104200] ? security_mmap_addr+0x7d/0xa0 [ 32.104727] ? get_unmapped_area+0x1f5/0x3f0 [ 32.105275] do_mmap+0x854/0xf00 [ 32.105711] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.106201] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.106767] ksys_mmap_pgoff+0x3af/0x500 [ 32.107271] do_syscall_64+0x3f/0x90 [ 32.107749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.108408] RIP: 0033:0x7f9f3fa57d82 [ 32.108863] 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 [ 32.110998] RSP: 002b:00007ffd8740d158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.111903] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9f3fa57d82 [ 32.112744] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9f3ee91000 [ 32.113588] RBP: 00007f9f3ee91000 R08: 0000000000000009 R09: 0000000000001000 [ 32.114556] R10: 0000000000000812 R11: 0000000000000206 R12: 000055709b5f4b20 [ 32.115404] R13: 00007ffd8740d170 R14: 00007ffd8740d1a0 R15: 00007ffd8740d500 [ 32.116274] [ 32.116563] [ 32.116777] Allocated by task 212: [ 32.117205] kasan_save_stack+0x22/0x50 [ 32.117708] kasan_set_track+0x25/0x30 [ 32.118199] __kasan_slab_alloc+0x59/0x70 [ 32.118721] kmem_cache_alloc+0x16b/0x370 [ 32.119229] vm_area_dup+0x20/0x160 [ 32.119678] __split_vma+0x170/0x950 [ 32.120149] split_vma+0xc6/0x110 [ 32.120582] mprotect_fixup+0x8d2/0xb30 [ 32.121088] do_mprotect_pkey+0x87e/0xd40 [ 32.121602] __x64_sys_mprotect+0x78/0xc0 [ 32.122118] do_syscall_64+0x3f/0x90 [ 32.122594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.123237] [ 32.123452] Freed by task 212: [ 32.123857] kasan_save_stack+0x22/0x50 [ 32.124356] kasan_set_track+0x25/0x30 [ 32.124846] kasan_save_free_info+0x2b/0x50 [ 32.125378] __kasan_slab_free+0x10a/0x190 [ 32.125910] kmem_cache_free+0x10d/0x4d0 [ 32.126416] rcu_core+0x8c8/0x2860 [ 32.126858] __do_softirq+0x1b7/0x7d4 [ 32.127330] [ 32.127544] Last potentially related work creation: [ 32.128131] kasan_save_stack+0x22/0x50 [ 32.128632] __kasan_record_aux_stack+0x8e/0xa0 [ 32.129202] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.129845] remove_vma+0x139/0x170 [ 32.130292] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.130843] do_vmi_munmap+0x1f1/0x2b0 [ 32.131324] __vm_munmap+0x138/0x3a0 [ 32.131785] __x64_sys_munmap+0x59/0x80 [ 32.132303] do_syscall_64+0x3f/0x90 [ 32.132777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.133438] [ 32.133652] The buggy address belongs to the object at ffff888015f229f8 [ 32.133652] which belongs to the cache vm_area_struct of size 168 [ 32.135110] The buggy address is located 88 bytes inside of [ 32.135110] freed 168-byte region [ffff888015f229f8, ffff888015f22aa0) [ 32.136515] [ 32.136732] The buggy address belongs to the physical page: [ 32.137387] page:00000000e52674de refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f22 [ 32.138469] memcg:ffff88800e9a4801 [ 32.138895] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.139536] page_type: 0xffffffff() [ 32.139989] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 32.140909] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9a4801 [ 32.141830] page dumped because: kasan: bad access detected [ 32.142508] [ 32.142722] Memory state around the buggy address: [ 32.143308] ffff888015f22900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.144173] ffff888015f22980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.145036] >ffff888015f22a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.145901] ^ [ 32.146639] ffff888015f22a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.147543] ffff888015f22b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.148459] ================================================================== [ 32.149538] Disabling lock debugging due to kernel taint [ 34.047661] BUG: Bad rss-counter state mm:000000008553a5db type:MM_FILEPAGES val:33 [ 34.048948] BUG: Bad rss-counter state mm:000000008553a5db type:MM_ANONPAGES val:22 [ 34.493593] BUG: Bad rss-counter state mm:00000000fc0fd606 type:MM_FILEPAGES val:33 [ 34.495209] BUG: Bad rss-counter state mm:00000000fc0fd606 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46931' (ECDSA) to the list of known hosts. 2023/06/20 12:59:30 fuzzer started 2023/06/20 12:59:30 dialing manager at localhost:36067 2023/06/20 12:59:30 checking machine... 2023/06/20 12:59:30 checking revisions... [ 35.215860] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:59:30 testing simple program... [ 35.263656] cgroup: Unknown subsys name 'net' [ 35.307265] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:59:30 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=00000000000361a0 RCX=0000000000000004 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff818305bd RBP=ffff88800e14d500 RSP=ffff8880146b7ba8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000808 R13=ffffffff87b6a200 R14=ffff88806ce361a0 R15=ffff88800e14d500 RIP=ffffffff81830608 RFL=00000012 [----A--] 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 00007f0b59939900 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=00007fb6eb0dd320 CR3=000000000fc88000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fffd1df4a88 CR3=0000000005482000 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=00007fba2486251000005577cdbd3790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000