syzkaller login: [ 30.699132] BUG: Bad rss-counter state mm:00000000f3917838 type:MM_FILEPAGES val:33 [ 30.700882] BUG: Bad rss-counter state mm:00000000f3917838 type:MM_ANONPAGES val:22 [ 30.862266] ================================================================== [ 30.863269] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.864269] Read of size 8 at addr ffff88800e4365c8 by task sshd/219 [ 30.865143] [ 30.865465] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.866425] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.867502] Call Trace: [ 30.867849] [ 30.868156] dump_stack_lvl+0x91/0xf0 [ 30.868681] print_report+0xcc/0x620 [ 30.869192] ? __virt_addr_valid+0x102/0x340 [ 30.869778] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.870446] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.871103] kasan_report+0xbe/0xf0 [ 30.871616] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.872281] vma_interval_tree_remove+0xc75/0xec0 [ 30.872922] vma_prepare+0xc54/0x11a0 [ 30.873428] __split_vma+0x5af/0x950 [ 30.873927] ? __pfx___split_vma+0x10/0x10 [ 30.874486] ? find_held_lock+0x2c/0x110 [ 30.875045] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.875640] ? lock_is_held_type+0x9f/0x120 [ 30.876204] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.876852] ? mtree_range_walk+0x632/0x900 [ 30.877443] ? mas_walk+0x5c7/0x7c0 [ 30.877962] do_vmi_munmap+0x1f1/0x2b0 [ 30.878499] mmap_region+0x1f9/0x2660 [ 30.879007] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.879538] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.880288] ? __pfx_lock_acquire+0x10/0x10 [ 30.880849] ? __pfx_mmap_region+0x10/0x10 [ 30.881401] ? security_mmap_addr+0x7d/0xa0 [ 30.881962] ? get_unmapped_area+0x1f5/0x3f0 [ 30.882539] do_mmap+0x854/0xf00 [ 30.882997] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.883522] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.884108] ksys_mmap_pgoff+0x3af/0x500 [ 30.884637] do_syscall_64+0x3f/0x90 [ 30.885136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.885814] RIP: 0033:0x7f7bbefd4d82 [ 30.886303] 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 [ 30.888565] RSP: 002b:00007fff5eb97838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.889536] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7bbefd4d82 [ 30.890464] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7bbe40e000 [ 30.891389] RBP: 00007f7bbe40e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.892291] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d4ebc4df70 [ 30.893194] R13: 00007fff5eb97850 R14: 00007fff5eb97880 R15: 00007fff5eb97be0 [ 30.894104] [ 30.894423] [ 30.894651] Allocated by task 212: [ 30.895106] kasan_save_stack+0x22/0x50 [ 30.895650] kasan_set_track+0x25/0x30 [ 30.896173] __kasan_slab_alloc+0x59/0x70 [ 30.896721] kmem_cache_alloc+0x16b/0x370 [ 30.897265] vm_area_dup+0x20/0x160 [ 30.897741] __split_vma+0x170/0x950 [ 30.898256] split_vma+0xc6/0x110 [ 30.898720] mprotect_fixup+0x8d2/0xb30 [ 30.899252] do_mprotect_pkey+0x87e/0xd40 [ 30.899806] __x64_sys_mprotect+0x78/0xc0 [ 30.900381] do_syscall_64+0x3f/0x90 [ 30.900890] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.901561] [ 30.901787] Freed by task 26: [ 30.902216] kasan_save_stack+0x22/0x50 [ 30.902760] kasan_set_track+0x25/0x30 [ 30.903291] kasan_save_free_info+0x2b/0x50 [ 30.903850] __kasan_slab_free+0x10a/0x190 [ 30.904428] kmem_cache_free+0x10d/0x4d0 [ 30.904961] rcu_core+0x8c8/0x2860 [ 30.905420] __do_softirq+0x1b7/0x7d4 [ 30.905927] [ 30.906166] Last potentially related work creation: [ 30.906793] kasan_save_stack+0x22/0x50 [ 30.907321] __kasan_record_aux_stack+0x8e/0xa0 [ 30.907911] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.908569] remove_vma+0x139/0x170 [ 30.909041] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.909611] do_vmi_munmap+0x1f1/0x2b0 [ 30.910131] __vm_munmap+0x138/0x3a0 [ 30.910618] __x64_sys_munmap+0x59/0x80 [ 30.911139] do_syscall_64+0x3f/0x90 [ 30.911625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.912292] [ 30.912512] The buggy address belongs to the object at ffff88800e436570 [ 30.912512] which belongs to the cache vm_area_struct of size 168 [ 30.914048] The buggy address is located 88 bytes inside of [ 30.914048] freed 168-byte region [ffff88800e436570, ffff88800e436618) [ 30.915514] [ 30.915735] The buggy address belongs to the physical page: [ 30.916433] page:00000000dc08a97f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe436 [ 30.917559] memcg:ffff888010271b01 [ 30.918019] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.918690] page_type: 0xffffffff() [ 30.919155] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.920094] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010271b01 [ 30.921040] page dumped because: kasan: bad access detected [ 30.921726] [ 30.921954] Memory state around the buggy address: [ 30.922554] ffff88800e436480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.923447] ffff88800e436500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.924334] >ffff88800e436580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.925224] ^ [ 30.925906] ffff88800e436600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.926778] ffff88800e436680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.927651] ================================================================== [ 30.929086] Disabling lock debugging due to kernel taint [ 32.287188] BUG: Bad rss-counter state mm:000000006505f0e6 type:MM_FILEPAGES val:33 [ 32.287998] BUG: Bad rss-counter state mm:000000006505f0e6 type:MM_ANONPAGES val:22 [ 32.798988] BUG: Bad rss-counter state mm:000000009a532892 type:MM_FILEPAGES val:33 [ 32.799986] BUG: Bad rss-counter state mm:000000009a532892 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22689' (ECDSA) to the list of known hosts. 2023/06/19 22:48:54 fuzzer started 2023/06/19 22:48:54 dialing manager at localhost:44161 2023/06/19 22:48:54 checking machine... 2023/06/19 22:48:54 checking revisions... [ 33.550031] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:48:54 testing simple program... [ 33.605680] cgroup: Unknown subsys name 'net' [ 33.643110] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:48:53 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f67d1c0 RSI=ffffffff814c8504 RDI=ffff88800f67d5b4 RBP=0000000000000000 RSP=ffff888010327428 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88801868a260 RIP=ffffffff814c081b 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 00007fb6e0e62700 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=00007fff23fa3000 CR3=0000000015868000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732033353a3834 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383137 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=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=00007f4794ca9460 CR3=000000000d99a000 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=54867b3af14dbc818f42e9b3b5c31130 XMM02=ec2efd57dc4c00df0000000000122408 XMM03=9535293b2d0efa0200000000001224d8 XMM04=006c099531c79ec100000000000ae988 XMM05=dfcdbad4f1609c370000000000135178 XMM06=0cf10d2087512fb20000000000133fe0 XMM07=e042d86d42eb936e0000000000125860 XMM08=9535293b2d0efa0200000000001224d8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000