syzkaller login: [ 31.782974] BUG: Bad rss-counter state mm:000000003268098f type:MM_FILEPAGES val:33 [ 31.784204] BUG: Bad rss-counter state mm:000000003268098f type:MM_ANONPAGES val:22 [ 31.929336] ================================================================== [ 31.930523] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.931448] Read of size 8 at addr ffff88801460f5c8 by task sshd/219 [ 31.932407] [ 31.932629] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.933487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.934512] Call Trace: [ 31.934833] [ 31.935114] dump_stack_lvl+0x91/0xf0 [ 31.935592] print_report+0xcc/0x620 [ 31.936081] ? __virt_addr_valid+0x102/0x340 [ 31.936621] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.937232] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.937847] kasan_report+0xbe/0xf0 [ 31.938344] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.938958] vma_interval_tree_remove+0xc75/0xec0 [ 31.939561] vma_prepare+0xc54/0x11a0 [ 31.940034] __split_vma+0x5af/0x950 [ 31.940507] ? __pfx___split_vma+0x10/0x10 [ 31.941024] ? find_held_lock+0x2c/0x110 [ 31.941540] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.942105] ? lock_is_held_type+0x9f/0x120 [ 31.942635] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.943236] ? mtree_range_walk+0x632/0x900 [ 31.943787] ? mas_walk+0x5c7/0x7c0 [ 31.944264] do_vmi_munmap+0x1f1/0x2b0 [ 31.944755] mmap_region+0x1f9/0x2660 [ 31.945237] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.945743] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.946460] ? __pfx_lock_acquire+0x10/0x10 [ 31.946996] ? __pfx_mmap_region+0x10/0x10 [ 31.947570] ? security_mmap_addr+0x7d/0xa0 [ 31.948301] ? get_unmapped_area+0x1f5/0x3f0 [ 31.948904] do_mmap+0x854/0xf00 [ 31.949349] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.949866] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.950610] ksys_mmap_pgoff+0x3af/0x500 [ 31.951319] do_syscall_64+0x3f/0x90 [ 31.952002] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.952915] RIP: 0033:0x7f31a7dddd82 [ 31.953552] 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 [ 31.956200] RSP: 002b:00007ffdda203cc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.957198] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31a7dddd82 [ 31.958085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31a7217000 [ 31.958961] RBP: 00007f31a7217000 R08: 0000000000000009 R09: 0000000000001000 [ 31.959824] R10: 0000000000000812 R11: 0000000000000206 R12: 00005648e06d6ec0 [ 31.960683] R13: 00007ffdda203ce0 R14: 00007ffdda203d10 R15: 00007ffdda204070 [ 31.961559] [ 31.961847] [ 31.962081] Allocated by task 212: [ 31.962524] kasan_save_stack+0x22/0x50 [ 31.963029] kasan_set_track+0x25/0x30 [ 31.963544] __kasan_slab_alloc+0x59/0x70 [ 31.964071] kmem_cache_alloc+0x16b/0x370 [ 31.964601] vm_area_dup+0x20/0x160 [ 31.965057] __split_vma+0x170/0x950 [ 31.965550] split_vma+0xc6/0x110 [ 31.966001] mprotect_fixup+0x8d2/0xb30 [ 31.966512] do_mprotect_pkey+0x87e/0xd40 [ 31.967082] __x64_sys_mprotect+0x78/0xc0 [ 31.967596] do_syscall_64+0x3f/0x90 [ 31.968090] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.968755] [ 31.968968] Freed by task 212: [ 31.969359] kasan_save_stack+0x22/0x50 [ 31.969884] kasan_set_track+0x25/0x30 [ 31.970402] kasan_save_free_info+0x2b/0x50 [ 31.970964] __kasan_slab_free+0x10a/0x190 [ 31.971520] kmem_cache_free+0x10d/0x4d0 [ 31.972035] rcu_core+0x8c8/0x2860 [ 31.972508] __do_softirq+0x1b7/0x7d4 [ 31.973075] [ 31.973291] Last potentially related work creation: [ 31.973917] kasan_save_stack+0x22/0x50 [ 31.974457] __kasan_record_aux_stack+0x8e/0xa0 [ 31.975052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.975718] remove_vma+0x139/0x170 [ 31.976194] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.976772] do_vmi_munmap+0x1f1/0x2b0 [ 31.977263] __vm_munmap+0x138/0x3a0 [ 31.977768] __x64_sys_munmap+0x59/0x80 [ 31.978289] do_syscall_64+0x3f/0x90 [ 31.978790] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.979472] [ 31.979694] The buggy address belongs to the object at ffff88801460f570 [ 31.979694] which belongs to the cache vm_area_struct of size 168 [ 31.981257] The buggy address is located 88 bytes inside of [ 31.981257] freed 168-byte region [ffff88801460f570, ffff88801460f618) [ 31.982722] [ 31.982946] The buggy address belongs to the physical page: [ 31.983605] page:00000000570badc3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1460f [ 31.984710] memcg:ffff88801460e101 [ 31.985149] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.985804] page_type: 0xffffffff() [ 31.986274] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.987202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801460e101 [ 31.988122] page dumped because: kasan: bad access detected [ 31.988787] [ 31.989007] Memory state around the buggy address: [ 31.989596] ffff88801460f480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.990474] ffff88801460f500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.991329] >ffff88801460f580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.992212] ^ [ 31.992936] ffff88801460f600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.993826] ffff88801460f680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.994701] ================================================================== [ 31.995640] Disabling lock debugging due to kernel taint [ 34.598443] BUG: Bad rss-counter state mm:000000005c3d841e type:MM_FILEPAGES val:33 [ 34.599772] BUG: Bad rss-counter state mm:000000005c3d841e type:MM_ANONPAGES val:22 [ 35.092954] BUG: Bad rss-counter state mm:000000001033d1ed type:MM_FILEPAGES val:33 [ 35.094176] BUG: Bad rss-counter state mm:000000001033d1ed type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20797' (ECDSA) to the list of known hosts. 2023/06/20 00:53:58 fuzzer started 2023/06/20 00:53:58 dialing manager at localhost:44161 2023/06/20 00:53:58 checking machine... 2023/06/20 00:53:58 checking revisions... [ 35.757766] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:53:58 testing simple program... [ 35.815531] cgroup: Unknown subsys name 'net' [ 35.864207] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:53:57 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffe4dd98f28 CR3=000000000e770000 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=2038353a33353a3030203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a33353a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0a8db RBX=ffffffff860546dc RCX=ffffffff84601449 RDX=0000000000000000 RSI=ffffffff864baff8 RDI=ffffffff8605469c RBP=ffffffff8605469c RSP=ffff88806cf099c0 R8 =ffffffff864baff8 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffffffff8605471c R13=ffffffff8605469c R14=ffffffff8605469c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fe63dbdf900 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=00007f77b4795650 CR3=000000000c66c000 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=7b8b03a8317403a020427b35d541a35e XMM02=eff9b2d0a8fce9cb000000000011fab8 XMM03=2c67c8bc2e329bc3000000000011fbe0 XMM04=790d32399aefacb300000000000ae988 XMM05=a6d5e452234966bd0000000000134fa8 XMM06=dfcdbad4f1609c370000000000133e40 XMM07=fb795ef6d657705600000000001242a8 XMM08=2c67c8bc2e329bc3000000000011fbe0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000