syzkaller login: [ 30.318581] BUG: Bad rss-counter state mm:000000005722a879 type:MM_FILEPAGES val:33 [ 30.319802] BUG: Bad rss-counter state mm:000000005722a879 type:MM_ANONPAGES val:22 [ 30.359150] ================================================================== [ 30.360433] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.361575] Read of size 8 at addr ffff888014736058 by task sshd/219 [ 30.362517] [ 30.362786] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.363865] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.365084] Call Trace: [ 30.365473] [ 30.365818] dump_stack_lvl+0x91/0xf0 [ 30.366414] print_report+0xcc/0x620 [ 30.366985] ? __virt_addr_valid+0x102/0x340 [ 30.367668] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.368402] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.369143] kasan_report+0xbe/0xf0 [ 30.369709] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.370459] vma_interval_tree_remove+0xc75/0xec0 [ 30.371206] vma_prepare+0xc54/0x11a0 [ 30.371784] __split_vma+0x5af/0x950 [ 30.372356] ? __pfx___split_vma+0x10/0x10 [ 30.372981] ? find_held_lock+0x2c/0x110 [ 30.373608] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.374276] ? lock_is_held_type+0x9f/0x120 [ 30.374926] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.375669] ? mtree_range_walk+0x632/0x900 [ 30.376332] ? mas_walk+0x5c7/0x7c0 [ 30.376898] do_vmi_munmap+0x1f1/0x2b0 [ 30.377488] mmap_region+0x1f9/0x2660 [ 30.378072] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.378681] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.379542] ? __pfx_lock_acquire+0x10/0x10 [ 30.380189] ? __pfx_mmap_region+0x10/0x10 [ 30.380828] ? security_mmap_addr+0x7d/0xa0 [ 30.381450] ? get_unmapped_area+0x1f5/0x3f0 [ 30.382121] do_mmap+0x854/0xf00 [ 30.382646] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.383240] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.383897] ksys_mmap_pgoff+0x3af/0x500 [ 30.384453] do_syscall_64+0x3f/0x90 [ 30.384910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.385522] RIP: 0033:0x7f34d490bd82 [ 30.385949] 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 [ 30.387960] RSP: 002b:00007ffde28439b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.388812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f34d490bd82 [ 30.389618] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f34d3d45000 [ 30.390423] RBP: 00007f34d3d45000 R08: 0000000000000009 R09: 0000000000001000 [ 30.391227] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fec79feec0 [ 30.392028] R13: 00007ffde28439d0 R14: 00007ffde2843a00 R15: 00007ffde2843d60 [ 30.392861] [ 30.393150] [ 30.393353] Allocated by task 212: [ 30.393781] kasan_save_stack+0x22/0x50 [ 30.394278] kasan_set_track+0x25/0x30 [ 30.394770] __kasan_slab_alloc+0x59/0x70 [ 30.395302] kmem_cache_alloc+0x16b/0x370 [ 30.395808] vm_area_dup+0x20/0x160 [ 30.396255] __split_vma+0x170/0x950 [ 30.396713] split_vma+0xc6/0x110 [ 30.397141] mprotect_fixup+0x8d2/0xb30 [ 30.397640] do_mprotect_pkey+0x87e/0xd40 [ 30.398154] __x64_sys_mprotect+0x78/0xc0 [ 30.398670] do_syscall_64+0x3f/0x90 [ 30.399147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.399788] [ 30.400001] Freed by task 212: [ 30.400376] kasan_save_stack+0x22/0x50 [ 30.400874] kasan_set_track+0x25/0x30 [ 30.401370] kasan_save_free_info+0x2b/0x50 [ 30.401890] __kasan_slab_free+0x10a/0x190 [ 30.402414] kmem_cache_free+0x10d/0x4d0 [ 30.402924] rcu_core+0x8c8/0x2860 [ 30.403363] __do_softirq+0x1b7/0x7d4 [ 30.403826] [ 30.404035] Last potentially related work creation: [ 30.404610] kasan_save_stack+0x22/0x50 [ 30.405087] __kasan_record_aux_stack+0x8e/0xa0 [ 30.405655] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.406274] remove_vma+0x139/0x170 [ 30.406722] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.407277] do_vmi_munmap+0x1f1/0x2b0 [ 30.407754] __vm_munmap+0x138/0x3a0 [ 30.408212] __x64_sys_munmap+0x59/0x80 [ 30.408684] do_syscall_64+0x3f/0x90 [ 30.409135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.409744] [ 30.409952] The buggy address belongs to the object at ffff888014736000 [ 30.409952] which belongs to the cache vm_area_struct of size 168 [ 30.411368] The buggy address is located 88 bytes inside of [ 30.411368] freed 168-byte region [ffff888014736000, ffff8880147360a8) [ 30.412711] [ 30.412918] The buggy address belongs to the physical page: [ 30.413541] page:0000000042c23539 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14736 [ 30.414576] memcg:ffff888019a1f301 [ 30.414990] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.415644] page_type: 0xffffffff() [ 30.416104] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.417036] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019a1f301 [ 30.417938] page dumped because: kasan: bad access detected [ 30.418603] [ 30.418821] Memory state around the buggy address: [ 30.419407] ffff888014735f00: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.420254] ffff888014735f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.421105] >ffff888014736000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.421950] ^ [ 30.422679] ffff888014736080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.423549] ffff888014736100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.424393] ================================================================== [ 30.425624] Disabling lock debugging due to kernel taint [ 33.300831] BUG: Bad rss-counter state mm:000000004ddbbbc7 type:MM_FILEPAGES val:33 [ 33.302226] BUG: Bad rss-counter state mm:000000004ddbbbc7 type:MM_ANONPAGES val:22 [ 33.675504] BUG: Bad rss-counter state mm:00000000e17d7b5c type:MM_FILEPAGES val:33 [ 33.676547] BUG: Bad rss-counter state mm:00000000e17d7b5c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43013' (ECDSA) to the list of known hosts. 2023/06/20 19:18:39 fuzzer started 2023/06/20 19:18:40 dialing manager at localhost:36067 2023/06/20 19:18:40 checking machine... 2023/06/20 19:18:40 checking revisions... [ 34.386052] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:18:40 testing simple program... [ 34.433828] cgroup: Unknown subsys name 'net' [ 34.486615] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:18:39 Registers: info registers vcpu 0 RAX=ffffffff8450cc7f RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888018a5ff01 RSI=ffff888018a5ff38 RDI=ffff888018a5ff38 RBP=ffff888018a5fa58 RSP=ffff888018a5f990 R8 =ffffffff863b3588 R9 =ffff888018a5fa40 R10=0000000000038001 R11=000000000008a96a R12=ffff888018a5fa60 R13=ffff888018a5fa48 R14=ffff888018a5ff40 R15=ffff888018a5fa00 RIP=ffffffff81131041 RFL=00000202 [-------] 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 00007fd3ff908900 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=00007fff31953000 CR3=0000000014768000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007f93ad428230 CR3=000000000c59a000 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=fb574ab3c3f766ac7c423f5233308e88 XMM02=0000000000119ee8eff9b2d0a8fce9cb XMM03=0000000000119fb82c67c8bc2e329bc3 XMM04=06869011f037ec9c00000000000ae988 XMM05=dfcdbad4f1609c370000000000131640 XMM06=f6e69d07fb0a25af00000000001304a8 XMM07=e042d86d42eb936e0000000000121a48 XMM08=d31bad822ba3855f0000000000119fb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000