syzkaller login: [ 31.336664] BUG: Bad rss-counter state mm:00000000e8203bd8 type:MM_FILEPAGES val:33 [ 31.338430] BUG: Bad rss-counter state mm:00000000e8203bd8 type:MM_ANONPAGES val:22 [ 31.500190] ================================================================== [ 31.501282] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.502429] Read of size 8 at addr ffff88800e91b140 by task sshd/220 [ 31.503456] [ 31.503716] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.504764] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.506016] Call Trace: [ 31.506425] [ 31.506772] dump_stack_lvl+0x91/0xf0 [ 31.507367] print_report+0xcc/0x620 [ 31.507934] ? __virt_addr_valid+0x102/0x340 [ 31.508578] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.509304] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.510020] kasan_report+0xbe/0xf0 [ 31.510594] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.511322] vma_interval_tree_remove+0xc75/0xec0 [ 31.512034] vma_prepare+0xc54/0x11a0 [ 31.512599] __split_vma+0x5af/0x950 [ 31.513157] ? __pfx___split_vma+0x10/0x10 [ 31.513784] ? find_held_lock+0x2c/0x110 [ 31.514421] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.515090] ? lock_is_held_type+0x9f/0x120 [ 31.515634] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.516237] ? mtree_range_walk+0x632/0x900 [ 31.516778] ? mas_walk+0x5c7/0x7c0 [ 31.517245] do_vmi_munmap+0x1f1/0x2b0 [ 31.517733] mmap_region+0x1f9/0x2660 [ 31.518219] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.518730] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.519434] ? __pfx_lock_acquire+0x10/0x10 [ 31.519961] ? __pfx_mmap_region+0x10/0x10 [ 31.520486] ? security_mmap_addr+0x7d/0xa0 [ 31.521009] ? get_unmapped_area+0x1f5/0x3f0 [ 31.521555] do_mmap+0x854/0xf00 [ 31.521995] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.522490] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.523050] ksys_mmap_pgoff+0x3af/0x500 [ 31.523552] do_syscall_64+0x3f/0x90 [ 31.524028] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.524674] RIP: 0033:0x7f242dc8ed82 [ 31.525125] 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 [ 31.527255] RSP: 002b:00007ffd85836a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.528154] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f242dc8ed82 [ 31.528997] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f242d0c8000 [ 31.529880] RBP: 00007f242d0c8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.530764] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627cfd02d90 [ 31.531636] R13: 00007ffd85836a80 R14: 00007ffd85836ab0 R15: 00007ffd85836e10 [ 31.532524] [ 31.532822] [ 31.533046] Allocated by task 213: [ 31.533483] kasan_save_stack+0x22/0x50 [ 31.534005] kasan_set_track+0x25/0x30 [ 31.534534] __kasan_slab_alloc+0x59/0x70 [ 31.535072] kmem_cache_alloc+0x16b/0x370 [ 31.535604] vm_area_dup+0x20/0x160 [ 31.536071] __split_vma+0x170/0x950 [ 31.536547] split_vma+0xc6/0x110 [ 31.537001] mprotect_fixup+0x8d2/0xb30 [ 31.537515] do_mprotect_pkey+0x87e/0xd40 [ 31.538048] __x64_sys_mprotect+0x78/0xc0 [ 31.538590] do_syscall_64+0x3f/0x90 [ 31.539082] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.539754] [ 31.539980] Freed by task 97: [ 31.540371] kasan_save_stack+0x22/0x50 [ 31.540894] kasan_set_track+0x25/0x30 [ 31.541408] kasan_save_free_info+0x2b/0x50 [ 31.541955] __kasan_slab_free+0x10a/0x190 [ 31.542527] kmem_cache_free+0x10d/0x4d0 [ 31.543054] rcu_core+0x8c8/0x2860 [ 31.543523] __do_softirq+0x1b7/0x7d4 [ 31.544017] [ 31.544353] Last potentially related work creation: [ 31.544965] kasan_save_stack+0x22/0x50 [ 31.545485] __kasan_record_aux_stack+0x8e/0xa0 [ 31.546072] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.546743] remove_vma+0x139/0x170 [ 31.547210] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.547779] do_vmi_munmap+0x1f1/0x2b0 [ 31.548280] __vm_munmap+0x138/0x3a0 [ 31.548767] __x64_sys_munmap+0x59/0x80 [ 31.549284] do_syscall_64+0x3f/0x90 [ 31.549781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.550456] [ 31.550679] The buggy address belongs to the object at ffff88800e91b0e8 [ 31.550679] which belongs to the cache vm_area_struct of size 168 [ 31.552221] The buggy address is located 88 bytes inside of [ 31.552221] freed 168-byte region [ffff88800e91b0e8, ffff88800e91b190) [ 31.553675] [ 31.553893] The buggy address belongs to the physical page: [ 31.554586] page:000000000bd69be7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe91b [ 31.555694] memcg:ffff88800e86c301 [ 31.556124] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.556784] page_type: 0xffffffff() [ 31.557244] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.558184] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e86c301 [ 31.559111] page dumped because: kasan: bad access detected [ 31.559788] [ 31.560009] Memory state around the buggy address: [ 31.560607] ffff88800e91b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.561485] ffff88800e91b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.562364] >ffff88800e91b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.563243] ^ [ 31.563901] ffff88800e91b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.564784] ffff88800e91b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.565659] ================================================================== [ 31.566623] Disabling lock debugging due to kernel taint [ 33.215767] BUG: Bad rss-counter state mm:00000000185d5b16 type:MM_FILEPAGES val:33 [ 33.216306] BUG: Bad rss-counter state mm:00000000185d5b16 type:MM_ANONPAGES val:22 [ 33.555796] BUG: Bad rss-counter state mm:000000004451d452 type:MM_FILEPAGES val:33 [ 33.556334] BUG: Bad rss-counter state mm:000000004451d452 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53241' (ECDSA) to the list of known hosts. 2023/06/20 16:44:03 fuzzer started 2023/06/20 16:44:03 dialing manager at localhost:36067 2023/06/20 16:44:03 checking machine... 2023/06/20 16:44:03 checking revisions... [ 34.135020] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:44:03 testing simple program... [ 34.182077] cgroup: Unknown subsys name 'net' [ 34.228813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:44:03 Registers: info registers vcpu 0 RAX=ffff888016394ac0 RBX=1ffff11001e3ffa2 RCX=0000000000000000 RDX=ffff88801039b680 RSI=ffffffff83633259 RDI=ffff88800eb78430 RBP=ffff88800eb78280 RSP=ffff88800f1ffcc8 R8 =0000000000000007 R9 =0000000000000000 R10=ffff88800eb78280 R11=0000000000000000 R12=ffff88800f1ffd50 R13=ffff88800f1ffd40 R14=0000000000000000 R15=ffff888016394ac0 RIP=ffffffff8363325d RFL=00000293 [--S-A-C] 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 00007f74aefd0900 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=00007fff9b654000 CR3=000000000cc0a000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=00007f3b0554fa30 CR3=000000000d59a000 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=df292b2fa946bf80d04e1105954ae523 XMM02=000000000011a4c0ec2efd57dc4c00df XMM03=0000000000121e4095dab22bb951bc2f XMM04=d73df685bf25f56600000000000ae988 XMM05=19e9129bd510f2350000000000131d18 XMM06=4fda316b135da52b0000000000131ba0 XMM07=e042d86d42eb936e00000000001220c0 XMM08=95dab22bb951bc2f000000000011a520 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000