syzkaller login: [ 30.323805] BUG: Bad rss-counter state mm:00000000c5fdb835 type:MM_FILEPAGES val:33 [ 30.324530] BUG: Bad rss-counter state mm:00000000c5fdb835 type:MM_ANONPAGES val:22 [ 30.356224] ================================================================== [ 30.357264] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.358300] Read of size 8 at addr ffff88801a135d08 by task sshd/221 [ 30.359207] [ 30.359503] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.360414] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.361449] Call Trace: [ 30.361788] [ 30.362088] dump_stack_lvl+0x91/0xf0 [ 30.362615] print_report+0xcc/0x620 [ 30.363144] ? __virt_addr_valid+0x102/0x340 [ 30.363725] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.364377] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.365060] kasan_report+0xbe/0xf0 [ 30.365582] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.366255] vma_interval_tree_remove+0xc75/0xec0 [ 30.366924] vma_prepare+0xc54/0x11a0 [ 30.367444] __split_vma+0x5af/0x950 [ 30.367962] ? __pfx___split_vma+0x10/0x10 [ 30.368517] ? find_held_lock+0x2c/0x110 [ 30.369068] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.369669] ? lock_is_held_type+0x9f/0x120 [ 30.370250] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.370900] ? mtree_range_walk+0x632/0x900 [ 30.371487] ? mas_walk+0x5c7/0x7c0 [ 30.371991] do_vmi_munmap+0x1f1/0x2b0 [ 30.372511] mmap_region+0x1f9/0x2660 [ 30.373029] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.373583] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.374329] ? __pfx_lock_acquire+0x10/0x10 [ 30.374905] ? __pfx_mmap_region+0x10/0x10 [ 30.375468] ? security_mmap_addr+0x7d/0xa0 [ 30.376026] ? get_unmapped_area+0x1f5/0x3f0 [ 30.376610] do_mmap+0x854/0xf00 [ 30.377078] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.377610] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.378213] ksys_mmap_pgoff+0x3af/0x500 [ 30.378749] do_syscall_64+0x3f/0x90 [ 30.379267] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.379955] RIP: 0033:0x7fb0df66cd82 [ 30.380442] 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 [ 30.382746] RSP: 002b:00007ffc3e573c28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.383713] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb0df66cd82 [ 30.384603] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb0deaa6000 [ 30.385530] RBP: 00007fb0deaa6000 R08: 0000000000000009 R09: 0000000000001000 [ 30.386460] R10: 0000000000000812 R11: 0000000000000206 R12: 00005598f6b86ec0 [ 30.387398] R13: 00007ffc3e573c40 R14: 00007ffc3e573c70 R15: 00007ffc3e573fd0 [ 30.388341] [ 30.388658] [ 30.388896] Allocated by task 214: [ 30.389371] kasan_save_stack+0x22/0x50 [ 30.389928] kasan_set_track+0x25/0x30 [ 30.390475] __kasan_slab_alloc+0x59/0x70 [ 30.391057] kmem_cache_alloc+0x16b/0x370 [ 30.391624] vm_area_dup+0x20/0x160 [ 30.392127] __split_vma+0x170/0x950 [ 30.392645] split_vma+0xc6/0x110 [ 30.393127] mprotect_fixup+0x8d2/0xb30 [ 30.393674] do_mprotect_pkey+0x87e/0xd40 [ 30.394246] __x64_sys_mprotect+0x78/0xc0 [ 30.394817] do_syscall_64+0x3f/0x90 [ 30.395362] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.396067] [ 30.396303] Freed by task 214: [ 30.396735] kasan_save_stack+0x22/0x50 [ 30.397289] kasan_set_track+0x25/0x30 [ 30.397853] kasan_save_free_info+0x2b/0x50 [ 30.398441] __kasan_slab_free+0x10a/0x190 [ 30.399038] kmem_cache_free+0x10d/0x4d0 [ 30.399597] rcu_core+0x8c8/0x2860 [ 30.400102] __do_softirq+0x1b7/0x7d4 [ 30.400622] [ 30.400856] Last potentially related work creation: [ 30.401530] kasan_save_stack+0x22/0x50 [ 30.402069] __kasan_record_aux_stack+0x8e/0xa0 [ 30.402681] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.403387] remove_vma+0x139/0x170 [ 30.403878] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.404483] do_vmi_munmap+0x1f1/0x2b0 [ 30.405011] __vm_munmap+0x138/0x3a0 [ 30.405518] __x64_sys_munmap+0x59/0x80 [ 30.406063] do_syscall_64+0x3f/0x90 [ 30.406584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.407314] [ 30.407547] The buggy address belongs to the object at ffff88801a135cb0 [ 30.407547] which belongs to the cache vm_area_struct of size 168 [ 30.409118] The buggy address is located 88 bytes inside of [ 30.409118] freed 168-byte region [ffff88801a135cb0, ffff88801a135d58) [ 30.410595] [ 30.410828] The buggy address belongs to the physical page: [ 30.411538] page:000000005a4530fd refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a135 [ 30.412689] memcg:ffff8880196df401 [ 30.413137] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.413815] page_type: 0xffffffff() [ 30.414289] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.415296] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880196df401 [ 30.416271] page dumped because: kasan: bad access detected [ 30.417004] [ 30.417231] Memory state around the buggy address: [ 30.417846] ffff88801a135c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.418744] ffff88801a135c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.419700] >ffff88801a135d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.420606] ^ [ 30.421079] ffff88801a135d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.421988] ffff88801a135e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.422889] ================================================================== [ 30.423867] Disabling lock debugging due to kernel taint [ 32.092311] BUG: Bad rss-counter state mm:000000003e0e63df type:MM_FILEPAGES val:33 [ 32.092944] BUG: Bad rss-counter state mm:000000003e0e63df type:MM_ANONPAGES val:22 [ 32.461598] BUG: Bad rss-counter state mm:00000000ea53049c type:MM_FILEPAGES val:33 [ 32.462377] BUG: Bad rss-counter state mm:00000000ea53049c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22151' (ECDSA) to the list of known hosts. 2023/06/20 22:02:06 fuzzer started 2023/06/20 22:02:06 dialing manager at localhost:36067 2023/06/20 22:02:06 checking machine... 2023/06/20 22:02:06 checking revisions... [ 33.171377] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:02:06 testing simple program... [ 33.223832] cgroup: Unknown subsys name 'net' [ 33.266928] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:02:05 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=1ffff11002d66de0 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888016b36ef0 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d928f RFL=00000247 [---Z-PC] 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 00007f7f7a2ac900 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=00007f7f7a28b020 CR3=000000000e59a000 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=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=0000000000000000 RBX=ffff88806cf09b30 RCX=0000000000000000 RDX=0000000000000070 RSI=0000000000000000 RDI=ffff88806cf09a98 RBP=ffff888008d951c0 RSP=ffff88806cf09a40 R8 =0000000000000130 R9 =0000000000000000 R10=ffff88806cf09a98 R11=0000000000000000 R12=0000000000000000 R13=ffff88806cf09ac0 R14=ffff888008d951c0 R15=ffff88806cf09a98 RIP=ffffffff8451341a RFL=00000247 [---Z-PC] 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=00007fb6560a6ce0 CR3=000000000e194000 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=2035303a32303a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a32303a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000