syzkaller login: [ 45.747003] BUG: Bad rss-counter state mm:00000000afece0a2 type:MM_FILEPAGES val:33 [ 45.747747] BUG: Bad rss-counter state mm:00000000afece0a2 type:MM_ANONPAGES val:22 [ 45.873530] ================================================================== [ 45.874221] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.874849] Read of size 8 at addr ffff888019dec140 by task sshd/221 [ 45.875362] [ 45.875506] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.876068] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.876725] Call Trace: [ 45.876947] [ 45.877147] dump_stack_lvl+0x91/0xf0 [ 45.877490] print_report+0xcc/0x620 [ 45.878074] ? __virt_addr_valid+0x102/0x340 [ 45.878481] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.878911] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.879340] kasan_report+0xbe/0xf0 [ 45.879690] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.880130] vma_interval_tree_remove+0xc75/0xec0 [ 45.880542] vma_prepare+0xc54/0x11a0 [ 45.880876] __split_vma+0x5af/0x950 [ 45.881198] ? __pfx___split_vma+0x10/0x10 [ 45.881552] ? find_held_lock+0x2c/0x110 [ 45.881893] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.882298] ? lock_is_held_type+0x9f/0x120 [ 45.882670] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.883096] ? mtree_range_walk+0x632/0x900 [ 45.883482] ? mas_walk+0x5c7/0x7c0 [ 45.883819] do_vmi_munmap+0x1f1/0x2b0 [ 45.884160] mmap_region+0x1f9/0x2660 [ 45.884500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.884860] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.885358] ? __pfx_lock_acquire+0x10/0x10 [ 45.885736] ? __pfx_mmap_region+0x10/0x10 [ 45.886088] ? security_mmap_addr+0x7d/0xa0 [ 45.886469] ? get_unmapped_area+0x1f5/0x3f0 [ 45.886844] do_mmap+0x854/0xf00 [ 45.887149] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.887495] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.887889] ksys_mmap_pgoff+0x3af/0x500 [ 45.888239] do_syscall_64+0x3f/0x90 [ 45.888572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.889033] RIP: 0033:0x7efde1cbcd82 [ 45.889338] 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 [ 45.890801] RSP: 002b:00007fffccb51678 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.891394] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efde1cbcd82 [ 45.891958] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efde10f6000 [ 45.892530] RBP: 00007efde10f6000 R08: 0000000000000009 R09: 0000000000001000 [ 45.893107] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ed5532aec0 [ 45.893691] R13: 00007fffccb51690 R14: 00007fffccb516c0 R15: 00007fffccb51a20 [ 45.894320] [ 45.894525] [ 45.894673] Allocated by task 214: [ 45.894966] kasan_save_stack+0x22/0x50 [ 45.895317] kasan_set_track+0x25/0x30 [ 45.895647] __kasan_slab_alloc+0x59/0x70 [ 45.896006] kmem_cache_alloc+0x16b/0x370 [ 45.896351] vm_area_dup+0x20/0x160 [ 45.896677] __split_vma+0x170/0x950 [ 45.896990] split_vma+0xc6/0x110 [ 45.897285] mprotect_fixup+0x8d2/0xb30 [ 45.897622] do_mprotect_pkey+0x87e/0xd40 [ 45.898160] __x64_sys_mprotect+0x78/0xc0 [ 45.898527] do_syscall_64+0x3f/0x90 [ 45.898977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.899409] [ 45.899551] Freed by task 214: [ 45.899802] kasan_save_stack+0x22/0x50 [ 45.900126] kasan_set_track+0x25/0x30 [ 45.900458] kasan_save_free_info+0x2b/0x50 [ 45.900830] __kasan_slab_free+0x10a/0x190 [ 45.901208] kmem_cache_free+0x10d/0x4d0 [ 45.901573] rcu_core+0x8c8/0x2860 [ 45.901892] __do_softirq+0x1b7/0x7d4 [ 45.902228] [ 45.902370] Last potentially related work creation: [ 45.902760] kasan_save_stack+0x22/0x50 [ 45.903095] __kasan_record_aux_stack+0x8e/0xa0 [ 45.903481] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.903918] remove_vma+0x139/0x170 [ 45.904227] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.904616] do_vmi_munmap+0x1f1/0x2b0 [ 45.904954] __vm_munmap+0x138/0x3a0 [ 45.905283] __x64_sys_munmap+0x59/0x80 [ 45.905626] do_syscall_64+0x3f/0x90 [ 45.905956] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.906423] [ 45.906566] The buggy address belongs to the object at ffff888019dec0e8 [ 45.906566] which belongs to the cache vm_area_struct of size 168 [ 45.907546] The buggy address is located 88 bytes inside of [ 45.907546] freed 168-byte region [ffff888019dec0e8, ffff888019dec190) [ 45.908467] [ 45.908607] The buggy address belongs to the physical page: [ 45.909039] page:00000000e0d612e6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19dec [ 45.909743] memcg:ffff888019e88001 [ 45.910036] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.910507] page_type: 0xffffffff() [ 45.910800] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 45.911433] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e88001 [ 45.912116] page dumped because: kasan: bad access detected [ 45.912561] [ 45.912706] Memory state around the buggy address: [ 45.913094] ffff888019dec000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.913672] ffff888019dec080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 45.914268] >ffff888019dec100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.914843] ^ [ 45.915280] ffff888019dec180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 45.915861] ffff888019dec200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 45.916445] ================================================================== [ 45.917181] Disabling lock debugging due to kernel taint [ 47.381409] BUG: Bad rss-counter state mm:00000000695ca204 type:MM_FILEPAGES val:33 [ 47.382121] BUG: Bad rss-counter state mm:00000000695ca204 type:MM_ANONPAGES val:22 [ 47.752684] BUG: Bad rss-counter state mm:000000008692372d type:MM_FILEPAGES val:33 [ 47.753435] BUG: Bad rss-counter state mm:000000008692372d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53580' (ECDSA) to the list of known hosts. 2023/06/20 09:36:30 fuzzer started 2023/06/20 09:36:30 dialing manager at localhost:44161 2023/06/20 09:36:30 checking machine... 2023/06/20 09:36:30 checking revisions... [ 48.294875] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:36:30 testing simple program... [ 48.335621] cgroup: Unknown subsys name 'net' [ 48.366829] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:36:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880169e9b40 RCX=ffffffff810ad76a RDX=ffff8880169e9b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000001 RSP=ffff888016f87ee0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffff8880169eb1c0 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c07e0 RFL=00000002 [-------] 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 00007f56b29e2700 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=00007ffe6f885000 CR3=0000000016928000 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=36333a3930203032206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3033325b646873732030333a3633 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383936 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007fc4d29c54b0 CR3=0000000014262000 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=f61b9aae9497998ece4100d3b21bd37a XMM02=2c67c8bc2e329bc3000000000011c488 XMM03=fb795ef6d65770560000000000123e08 XMM04=557cbcf2a0fed3d300000000000ae988 XMM05=1b480de6501576120000000000133df8 XMM06=c291bd5c70af25b900000000001337f0 XMM07=e042d86d42eb936e0000000000124088 XMM08=5f1996a545f693a5000000000011c4e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000