syzkaller login: [ 36.655345] BUG: Bad rss-counter state mm:00000000ab84ccde type:MM_FILEPAGES val:33 [ 36.656741] BUG: Bad rss-counter state mm:00000000ab84ccde type:MM_ANONPAGES val:22 [ 36.796732] ================================================================== [ 36.797627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.798550] Read of size 8 at addr ffff888019c67c20 by task sshd/220 [ 36.799330] [ 36.799552] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.800527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.801520] Call Trace: [ 36.801834] [ 36.802117] dump_stack_lvl+0x91/0xf0 [ 36.802600] print_report+0xcc/0x620 [ 36.803089] ? __virt_addr_valid+0x102/0x340 [ 36.803641] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.804249] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.804858] kasan_report+0xbe/0xf0 [ 36.805325] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.805947] vma_interval_tree_remove+0xc75/0xec0 [ 36.806549] vma_prepare+0xc54/0x11a0 [ 36.807045] __split_vma+0x5af/0x950 [ 36.807530] ? __pfx___split_vma+0x10/0x10 [ 36.808069] ? find_held_lock+0x2c/0x110 [ 36.808604] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.809192] ? lock_is_held_type+0x9f/0x120 [ 36.809747] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.810362] ? mtree_range_walk+0x632/0x900 [ 36.810939] ? mas_walk+0x5c7/0x7c0 [ 36.811421] do_vmi_munmap+0x1f1/0x2b0 [ 36.811925] mmap_region+0x1f9/0x2660 [ 36.812426] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.812953] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.813683] ? __pfx_lock_acquire+0x10/0x10 [ 36.814229] ? __pfx_mmap_region+0x10/0x10 [ 36.814774] ? security_mmap_addr+0x7d/0xa0 [ 36.815322] ? get_unmapped_area+0x1f5/0x3f0 [ 36.815878] do_mmap+0x854/0xf00 [ 36.816330] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.816845] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.817428] ksys_mmap_pgoff+0x3af/0x500 [ 36.817948] do_syscall_64+0x3f/0x90 [ 36.818437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.819124] RIP: 0033:0x7fd0cbe36d82 [ 36.819599] 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 [ 36.821801] RSP: 002b:00007ffe70b95bb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.822732] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0cbe36d82 [ 36.823612] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0cb270000 [ 36.824489] RBP: 00007fd0cb270000 R08: 0000000000000009 R09: 0000000000001000 [ 36.825365] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563d9e467ec0 [ 36.826241] R13: 00007ffe70b95bd0 R14: 00007ffe70b95c00 R15: 00007ffe70b95f60 [ 36.827129] [ 36.827426] [ 36.827646] Allocated by task 213: [ 36.828085] kasan_save_stack+0x22/0x50 [ 36.828604] kasan_set_track+0x25/0x30 [ 36.829111] __kasan_slab_alloc+0x59/0x70 [ 36.829651] kmem_cache_alloc+0x16b/0x370 [ 36.830192] vm_area_dup+0x20/0x160 [ 36.830654] __split_vma+0x170/0x950 [ 36.831144] split_vma+0xc6/0x110 [ 36.831593] mprotect_fixup+0x8d2/0xb30 [ 36.832100] do_mprotect_pkey+0x87e/0xd40 [ 36.832636] __x64_sys_mprotect+0x78/0xc0 [ 36.833170] do_syscall_64+0x3f/0x90 [ 36.833655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.834312] [ 36.834535] Freed by task 213: [ 36.834944] kasan_save_stack+0x22/0x50 [ 36.835461] kasan_set_track+0x25/0x30 [ 36.835968] kasan_save_free_info+0x2b/0x50 [ 36.836515] __kasan_slab_free+0x10a/0x190 [ 36.837062] kmem_cache_free+0x10d/0x4d0 [ 36.837577] rcu_core+0x8c8/0x2860 [ 36.838038] __do_softirq+0x1b7/0x7d4 [ 36.838528] [ 36.838763] Last potentially related work creation: [ 36.839361] kasan_save_stack+0x22/0x50 [ 36.839877] __kasan_record_aux_stack+0x8e/0xa0 [ 36.840461] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.841119] remove_vma+0x139/0x170 [ 36.841585] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.842153] do_vmi_munmap+0x1f1/0x2b0 [ 36.842647] __vm_munmap+0x138/0x3a0 [ 36.843134] __x64_sys_munmap+0x59/0x80 [ 36.843651] do_syscall_64+0x3f/0x90 [ 36.844136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.844795] [ 36.845014] The buggy address belongs to the object at ffff888019c67bc8 [ 36.845014] which belongs to the cache vm_area_struct of size 168 [ 36.846512] The buggy address is located 88 bytes inside of [ 36.846512] freed 168-byte region [ffff888019c67bc8, ffff888019c67c70) [ 36.847953] [ 36.848173] The buggy address belongs to the physical page: [ 36.848856] page:000000004a60c836 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c67 [ 36.849971] memcg:ffff888009753a01 [ 36.850409] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.851084] page_type: 0xffffffff() [ 36.851547] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 36.852484] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009753a01 [ 36.853409] page dumped because: kasan: bad access detected [ 36.854083] [ 36.854303] Memory state around the buggy address: [ 36.854920] ffff888019c67b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.855802] ffff888019c67b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.856685] >ffff888019c67c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.857553] ^ [ 36.858098] ffff888019c67c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 36.859001] ffff888019c67d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 36.859879] ================================================================== [ 36.861037] Disabling lock debugging due to kernel taint [ 38.752777] BUG: Bad rss-counter state mm:0000000094aa4b3e type:MM_FILEPAGES val:33 [ 38.753503] BUG: Bad rss-counter state mm:0000000094aa4b3e type:MM_ANONPAGES val:22 [ 39.244031] BUG: Bad rss-counter state mm:0000000081750d1d type:MM_FILEPAGES val:33 [ 39.245250] BUG: Bad rss-counter state mm:0000000081750d1d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38182' (ECDSA) to the list of known hosts. 2023/06/19 11:22:35 fuzzer started 2023/06/19 11:22:35 dialing manager at localhost:44161 2023/06/19 11:22:35 checking machine... 2023/06/19 11:22:35 checking revisions... [ 39.944458] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:22:35 testing simple program... [ 39.991211] cgroup: Unknown subsys name 'net' [ 40.043521] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:22:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00005651a697d600 RCX=0000000000000004 RDX=000000000000ffff RSI=00007f5468e1ec30 RDI=00005651a6984030 RBP=00005651a6984030 RSP=00007ffe2eac1d78 R8 =0000000000000000 R9 =fffffffffffcb050 R10=00007f5469395e10 R11=0000000000000008 R12=0000000000000604 R13=0000000000000012 R14=00007f5468e217f8 R15=00007f5468e1ec34 RIP=00007f5469395e15 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5468e43900 00000000 00000000 GS =0000 0000000000000000 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=00007f54693f8650 CR3=000000000e2e0000 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=000000ff0000000000000000ff000000 XMM01=6b696c0074707972636769620073696e XMM02=00000000000032313541485300000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000ffffff XMM08=00000000000000000000000000202020 XMM09=ffffffffffff00ffffffffff0000ffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff8140d856 RDX=ffff888016b0b680 RSI=0000000000000000 RDI=0000000000000000 RBP=0000562af3e10e94 RSP=ffff888019f27ca0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=00000000ffffffff R15=00000000ffffffff RIP=ffffffff814c0388 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 00007fa049aa7700 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=00007f089f11a640 CR3=000000000e8b8000 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=32323a3131203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303831 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000