syzkaller login: [ 32.579735] BUG: Bad rss-counter state mm:00000000cea87e9b type:MM_FILEPAGES val:33 [ 32.581193] BUG: Bad rss-counter state mm:00000000cea87e9b type:MM_ANONPAGES val:22 [ 32.734562] ================================================================== [ 32.735580] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.736635] Read of size 8 at addr ffff888018ef13f8 by task sshd/221 [ 32.737589] [ 32.737828] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.738778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.739880] Call Trace: [ 32.740235] [ 32.740552] dump_stack_lvl+0x91/0xf0 [ 32.741090] print_report+0xcc/0x620 [ 32.741628] ? __virt_addr_valid+0x102/0x340 [ 32.742237] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.742917] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.743616] kasan_report+0xbe/0xf0 [ 32.744141] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.744831] vma_interval_tree_remove+0xc75/0xec0 [ 32.745492] vma_prepare+0xc54/0x11a0 [ 32.746021] __split_vma+0x5af/0x950 [ 32.746538] ? __pfx___split_vma+0x10/0x10 [ 32.747118] ? find_held_lock+0x2c/0x110 [ 32.747702] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.748321] ? lock_is_held_type+0x9f/0x120 [ 32.748912] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.749574] ? mtree_range_walk+0x632/0x900 [ 32.750182] ? mas_walk+0x5c7/0x7c0 [ 32.750709] do_vmi_munmap+0x1f1/0x2b0 [ 32.751252] mmap_region+0x1f9/0x2660 [ 32.751807] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.752370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.753153] ? __pfx_lock_acquire+0x10/0x10 [ 32.753740] ? __pfx_mmap_region+0x10/0x10 [ 32.754371] ? security_mmap_addr+0x7d/0xa0 [ 32.754937] ? get_unmapped_area+0x1f5/0x3f0 [ 32.755528] do_mmap+0x854/0xf00 [ 32.755990] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.756516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.757112] ksys_mmap_pgoff+0x3af/0x500 [ 32.757651] do_syscall_64+0x3f/0x90 [ 32.758153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.758848] RIP: 0033:0x7faa315e3d82 [ 32.759362] 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 [ 32.761720] RSP: 002b:00007ffffa959b18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.762716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa315e3d82 [ 32.763684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa30a1d000 [ 32.764627] RBP: 00007faa30a1d000 R08: 0000000000000009 R09: 0000000000001000 [ 32.765555] R10: 0000000000000812 R11: 0000000000000206 R12: 00005586af2efec0 [ 32.766484] R13: 00007ffffa959b30 R14: 00007ffffa959b60 R15: 00007ffffa959ec0 [ 32.767441] [ 32.767764] [ 32.767998] Allocated by task 214: [ 32.768469] kasan_save_stack+0x22/0x50 [ 32.769022] kasan_set_track+0x25/0x30 [ 32.769561] __kasan_slab_alloc+0x59/0x70 [ 32.770137] kmem_cache_alloc+0x16b/0x370 [ 32.770710] vm_area_dup+0x20/0x160 [ 32.771211] __split_vma+0x170/0x950 [ 32.771731] split_vma+0xc6/0x110 [ 32.772188] mprotect_fixup+0x8d2/0xb30 [ 32.772724] do_mprotect_pkey+0x87e/0xd40 [ 32.773281] __x64_sys_mprotect+0x78/0xc0 [ 32.773854] do_syscall_64+0x3f/0x90 [ 32.774376] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.775081] [ 32.775332] Freed by task 214: [ 32.775764] kasan_save_stack+0x22/0x50 [ 32.776319] kasan_set_track+0x25/0x30 [ 32.776856] kasan_save_free_info+0x2b/0x50 [ 32.777441] __kasan_slab_free+0x10a/0x190 [ 32.778021] kmem_cache_free+0x10d/0x4d0 [ 32.778575] rcu_core+0x8c8/0x2860 [ 32.779061] __do_softirq+0x1b7/0x7d4 [ 32.779598] [ 32.779830] Last potentially related work creation: [ 32.780472] kasan_save_stack+0x22/0x50 [ 32.781028] __kasan_record_aux_stack+0x8e/0xa0 [ 32.781648] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.782347] remove_vma+0x139/0x170 [ 32.782842] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.783459] do_vmi_munmap+0x1f1/0x2b0 [ 32.783985] __vm_munmap+0x138/0x3a0 [ 32.784500] __x64_sys_munmap+0x59/0x80 [ 32.785045] do_syscall_64+0x3f/0x90 [ 32.785568] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.786263] [ 32.786498] The buggy address belongs to the object at ffff888018ef13a0 [ 32.786498] which belongs to the cache vm_area_struct of size 168 [ 32.788100] The buggy address is located 88 bytes inside of [ 32.788100] freed 168-byte region [ffff888018ef13a0, ffff888018ef1448) [ 32.789609] [ 32.789842] The buggy address belongs to the physical page: [ 32.790548] page:000000003646aae9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18ef1 [ 32.791737] memcg:ffff88800df3b401 [ 32.792196] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.792956] page_type: 0xffffffff() [ 32.793446] raw: 0100000000000200 ffff88800879fc80 ffffea0000363f40 0000000000000007 [ 32.794441] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df3b401 [ 32.795478] page dumped because: kasan: bad access detected [ 32.796199] [ 32.796432] Memory state around the buggy address: [ 32.797062] ffff888018ef1280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.797996] ffff888018ef1300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.798917] >ffff888018ef1380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.799865] ^ [ 32.800805] ffff888018ef1400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.801758] ffff888018ef1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.802703] ================================================================== [ 32.803937] Disabling lock debugging due to kernel taint [ 34.637915] BUG: Bad rss-counter state mm:00000000b45478bf type:MM_FILEPAGES val:33 [ 34.638920] BUG: Bad rss-counter state mm:00000000b45478bf type:MM_ANONPAGES val:22 [ 35.100347] BUG: Bad rss-counter state mm:0000000051c89672 type:MM_FILEPAGES val:33 [ 35.101330] BUG: Bad rss-counter state mm:0000000051c89672 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52538' (ECDSA) to the list of known hosts. 2023/06/19 23:59:57 fuzzer started 2023/06/19 23:59:57 dialing manager at localhost:44161 2023/06/19 23:59:57 checking machine... 2023/06/19 23:59:57 checking revisions... [ 35.880303] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:59:57 testing simple program... [ 35.924301] cgroup: Unknown subsys name 'net' [ 35.966325] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:59:55 Registers: info registers vcpu 0 RAX=1ffffffff0a5883d RBX=0000000000696ac0 RCX=0000000000000000 RDX=dffffc0000000000 RSI=ffffffff8170a9a4 RDI=0000000000000006 RBP=1ffff11002cf0f6d RSP=ffff888016787b60 R8 =0000000000000006 R9 =000000000001a5ab R10=000000000007ffdf R11=0000000000000000 R12=ffff88800fb34bc8 R13=0000563ee81f5000 R14=000000000007ffdf R15=0000000000000000 RIP=ffffffff8170a9c1 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa08d2e3900 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=0000563ee81f5bec CR3=0000000019bdc000 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=0000000000000001 RBX=ffffffff813ad420 RCX=ffffffff864bb001 RDX=ffff888008e27e78 RSI=0000000000000000 RDI=ffff88806cf09aa8 RBP=ffff888008e20000 RSP=ffff88806cf09a68 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff888008e27dc8 R13=ffff88806cf09ae0 R14=ffff888008e27dc8 R15=ffff88806cf09a98 RIP=ffffffff81130930 RFL=00000296 [--S-AP-] 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 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=00007f932cabd6d0 CR3=000000000e868000 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=2036353a39353a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a39353a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000