syzkaller login: [ 31.566335] BUG: Bad rss-counter state mm:00000000177604d9 type:MM_FILEPAGES val:33 [ 31.567777] BUG: Bad rss-counter state mm:00000000177604d9 type:MM_ANONPAGES val:22 [ 31.726858] ================================================================== [ 31.727952] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.729087] Read of size 8 at addr ffff8880163dc968 by task sshd/220 [ 31.730104] [ 31.730365] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.731407] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.732571] Call Trace: [ 31.732952] [ 31.733296] dump_stack_lvl+0x91/0xf0 [ 31.733878] print_report+0xcc/0x620 [ 31.734459] ? __virt_addr_valid+0x102/0x340 [ 31.735152] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.735880] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.736494] kasan_report+0xbe/0xf0 [ 31.736981] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.737603] vma_interval_tree_remove+0xc75/0xec0 [ 31.738228] vma_prepare+0xc54/0x11a0 [ 31.738718] __split_vma+0x5af/0x950 [ 31.739198] ? __pfx___split_vma+0x10/0x10 [ 31.739745] ? find_held_lock+0x2c/0x110 [ 31.740275] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.740842] ? lock_is_held_type+0x9f/0x120 [ 31.741385] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.741989] ? mtree_range_walk+0x632/0x900 [ 31.742544] ? mas_walk+0x5c7/0x7c0 [ 31.743047] do_vmi_munmap+0x1f1/0x2b0 [ 31.743536] mmap_region+0x1f9/0x2660 [ 31.744022] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.744534] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.745255] ? __pfx_lock_acquire+0x10/0x10 [ 31.745791] ? __pfx_mmap_region+0x10/0x10 [ 31.746323] ? security_mmap_addr+0x7d/0xa0 [ 31.746887] ? get_unmapped_area+0x1f5/0x3f0 [ 31.747452] do_mmap+0x854/0xf00 [ 31.747898] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.748395] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.748955] ksys_mmap_pgoff+0x3af/0x500 [ 31.749456] do_syscall_64+0x3f/0x90 [ 31.749928] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.750575] RIP: 0033:0x7f8f21d59d82 [ 31.751045] 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 [ 31.753157] RSP: 002b:00007fffc2e00018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.754048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8f21d59d82 [ 31.754907] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8f21193000 [ 31.755741] RBP: 00007f8f21193000 R08: 0000000000000009 R09: 0000000000001000 [ 31.756576] R10: 0000000000000812 R11: 0000000000000206 R12: 00005580360e8b20 [ 31.757413] R13: 00007fffc2e00030 R14: 00007fffc2e00060 R15: 00007fffc2e003c0 [ 31.758253] [ 31.758541] [ 31.758758] Allocated by task 213: [ 31.759186] kasan_save_stack+0x22/0x50 [ 31.759689] kasan_set_track+0x25/0x30 [ 31.760182] __kasan_slab_alloc+0x59/0x70 [ 31.760699] kmem_cache_alloc+0x16b/0x370 [ 31.761205] vm_area_dup+0x20/0x160 [ 31.761653] __split_vma+0x170/0x950 [ 31.762110] split_vma+0xc6/0x110 [ 31.762542] mprotect_fixup+0x8d2/0xb30 [ 31.763048] do_mprotect_pkey+0x87e/0xd40 [ 31.763561] __x64_sys_mprotect+0x78/0xc0 [ 31.764074] do_syscall_64+0x3f/0x90 [ 31.764541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.765176] [ 31.765388] Freed by task 203: [ 31.765774] kasan_save_stack+0x22/0x50 [ 31.766272] kasan_set_track+0x25/0x30 [ 31.766779] kasan_save_free_info+0x2b/0x50 [ 31.767307] __kasan_slab_free+0x10a/0x190 [ 31.767835] kmem_cache_free+0x10d/0x4d0 [ 31.768336] rcu_core+0x8c8/0x2860 [ 31.768775] __do_softirq+0x1b7/0x7d4 [ 31.769248] [ 31.769460] Last potentially related work creation: [ 31.770035] kasan_save_stack+0x22/0x50 [ 31.770564] __kasan_record_aux_stack+0x8e/0xa0 [ 31.771138] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.771769] remove_vma+0x139/0x170 [ 31.772220] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.772768] do_vmi_munmap+0x1f1/0x2b0 [ 31.773247] __vm_munmap+0x138/0x3a0 [ 31.773708] __x64_sys_munmap+0x59/0x80 [ 31.774197] do_syscall_64+0x3f/0x90 [ 31.774678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.775309] [ 31.775520] The buggy address belongs to the object at ffff8880163dc910 [ 31.775520] which belongs to the cache vm_area_struct of size 168 [ 31.776976] The buggy address is located 88 bytes inside of [ 31.776976] freed 168-byte region [ffff8880163dc910, ffff8880163dc9b8) [ 31.778360] [ 31.778573] The buggy address belongs to the physical page: [ 31.779283] page:000000004e3c0726 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x163dc [ 31.780428] memcg:ffff88800c51b201 [ 31.780870] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.781600] page_type: 0xffffffff() [ 31.782065] raw: 0100000000000200 ffff88800879fc80 ffffea00003b7a40 dead000000000003 [ 31.783024] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c51b201 [ 31.783930] page dumped because: kasan: bad access detected [ 31.784589] [ 31.784807] Memory state around the buggy address: [ 31.785387] ffff8880163dc800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.786358] ffff8880163dc880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.787205] >ffff8880163dc900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.788043] ^ [ 31.788813] ffff8880163dc980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.789650] ffff8880163dca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.790485] ================================================================== [ 31.791582] Disabling lock debugging due to kernel taint [ 33.908577] BUG: Bad rss-counter state mm:00000000a301eb48 type:MM_FILEPAGES val:33 [ 33.910221] BUG: Bad rss-counter state mm:00000000a301eb48 type:MM_ANONPAGES val:22 [ 34.453858] BUG: Bad rss-counter state mm:0000000082db4a0c type:MM_FILEPAGES val:33 [ 34.455069] BUG: Bad rss-counter state mm:0000000082db4a0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37334' (ECDSA) to the list of known hosts. 2023/06/19 12:56:48 fuzzer started 2023/06/19 12:56:48 dialing manager at localhost:44161 2023/06/19 12:56:48 checking machine... 2023/06/19 12:56:48 checking revisions... [ 35.112477] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:56:48 testing simple program... [ 35.163734] cgroup: Unknown subsys name 'net' [ 35.203434] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:56:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88806ce2c240 RCX=0000000000000000 RDX=ffffffff8542a6c0 RSI=ffff88806ce2c240 RDI=0000000000000000 RBP=0000000000000000 RSP=ffffffff85407db0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=ffff888008c58000 R12=ffff88806ce2c2f8 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff813fa702 RFL=00000093 [--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 0000000000000000 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=00007f491423f270 CR3=000000000f04c000 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=2037343a36353a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037343a36353a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=0000000000000201 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=0000000000000008 RDI=0000000000000000 RBP=ffffffff83871c18 RSP=ffff88801cd8fc80 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000001 R14=ffff8880144906b8 R15=ffff8880144903a0 RIP=ffffffff8118dbe2 RFL=00000046 [---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 00007f944ff88900 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=00007ffd07072000 CR3=000000001cde8000 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=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