syzkaller login: [ 39.075657] BUG: Bad rss-counter state mm:00000000abd0b8f9 type:MM_FILEPAGES val:33 [ 39.076876] BUG: Bad rss-counter state mm:00000000abd0b8f9 type:MM_ANONPAGES val:22 [ 39.238770] ================================================================== [ 39.239703] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.240650] Read of size 8 at addr ffff88800e75a310 by task sshd/220 [ 39.241423] [ 39.241812] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.242702] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.243690] Call Trace: [ 39.244050] [ 39.244342] dump_stack_lvl+0x91/0xf0 [ 39.244848] print_report+0xcc/0x620 [ 39.245341] ? __virt_addr_valid+0x102/0x340 [ 39.245903] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.246546] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.247183] kasan_report+0xbe/0xf0 [ 39.247665] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.248298] vma_interval_tree_remove+0xc75/0xec0 [ 39.248902] vma_prepare+0xc54/0x11a0 [ 39.249381] __split_vma+0x5af/0x950 [ 39.249876] ? __pfx___split_vma+0x10/0x10 [ 39.250441] ? find_held_lock+0x2c/0x110 [ 39.250974] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.251554] ? lock_is_held_type+0x9f/0x120 [ 39.252095] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.252724] ? mtree_range_walk+0x632/0x900 [ 39.253287] ? mas_walk+0x5c7/0x7c0 [ 39.253773] do_vmi_munmap+0x1f1/0x2b0 [ 39.254278] mmap_region+0x1f9/0x2660 [ 39.254763] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.255278] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.256010] ? __pfx_lock_acquire+0x10/0x10 [ 39.256550] ? __pfx_mmap_region+0x10/0x10 [ 39.257081] ? security_mmap_addr+0x7d/0xa0 [ 39.257631] ? get_unmapped_area+0x1f5/0x3f0 [ 39.258196] do_mmap+0x854/0xf00 [ 39.258646] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.259152] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.259729] ksys_mmap_pgoff+0x3af/0x500 [ 39.260254] do_syscall_64+0x3f/0x90 [ 39.260743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.261398] RIP: 0033:0x7f1c057e9d82 [ 39.261868] 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 [ 39.264017] RSP: 002b:00007ffca00c68c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.264942] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1c057e9d82 [ 39.265805] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1c04c23000 [ 39.266669] RBP: 00007f1c04c23000 R08: 0000000000000009 R09: 0000000000001000 [ 39.267512] R10: 0000000000000812 R11: 0000000000000206 R12: 000056212edee980 [ 39.268364] R13: 00007ffca00c68e0 R14: 00007ffca00c6910 R15: 00007ffca00c6c70 [ 39.269221] [ 39.269526] [ 39.269741] Allocated by task 212: [ 39.270195] kasan_save_stack+0x22/0x50 [ 39.270724] kasan_set_track+0x25/0x30 [ 39.271225] __kasan_slab_alloc+0x59/0x70 [ 39.271767] kmem_cache_alloc+0x16b/0x370 [ 39.272297] vm_area_dup+0x20/0x160 [ 39.272763] __split_vma+0x170/0x950 [ 39.273244] split_vma+0xc6/0x110 [ 39.273694] mprotect_fixup+0x8d2/0xb30 [ 39.274206] do_mprotect_pkey+0x87e/0xd40 [ 39.274733] __x64_sys_mprotect+0x78/0xc0 [ 39.275267] do_syscall_64+0x3f/0x90 [ 39.275768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.276425] [ 39.276650] Freed by task 212: [ 39.277039] kasan_save_stack+0x22/0x50 [ 39.277551] kasan_set_track+0x25/0x30 [ 39.278060] kasan_save_free_info+0x2b/0x50 [ 39.278609] __kasan_slab_free+0x10a/0x190 [ 39.279156] kmem_cache_free+0x10d/0x4d0 [ 39.279665] rcu_core+0x8c8/0x2860 [ 39.280119] __do_softirq+0x1b7/0x7d4 [ 39.280609] [ 39.280826] Last potentially related work creation: [ 39.281407] kasan_save_stack+0x22/0x50 [ 39.281912] __kasan_record_aux_stack+0x8e/0xa0 [ 39.282503] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.283229] remove_vma+0x139/0x170 [ 39.283683] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.284255] do_vmi_munmap+0x1f1/0x2b0 [ 39.284749] __vm_munmap+0x138/0x3a0 [ 39.285230] __x64_sys_munmap+0x59/0x80 [ 39.285728] do_syscall_64+0x3f/0x90 [ 39.286223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.286866] [ 39.287080] Second to last potentially related work creation: [ 39.287769] kasan_save_stack+0x22/0x50 [ 39.288283] __kasan_record_aux_stack+0x8e/0xa0 [ 39.288872] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.289513] remove_vma+0x139/0x170 [ 39.289992] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.290569] do_vmi_munmap+0x1f1/0x2b0 [ 39.291059] mmap_region+0x1f9/0x2660 [ 39.291537] do_mmap+0x854/0xf00 [ 39.291979] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.292471] ksys_mmap_pgoff+0x3af/0x500 [ 39.292978] do_syscall_64+0x3f/0x90 [ 39.293453] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.294106] [ 39.294325] The buggy address belongs to the object at ffff88800e75a2b8 [ 39.294325] which belongs to the cache vm_area_struct of size 168 [ 39.295799] The buggy address is located 88 bytes inside of [ 39.295799] freed 168-byte region [ffff88800e75a2b8, ffff88800e75a360) [ 39.297207] [ 39.297422] The buggy address belongs to the physical page: [ 39.298113] page:000000002fcda588 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe75a [ 39.299227] memcg:ffff88800e822001 [ 39.299657] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.300362] page_type: 0xffffffff() [ 39.300824] raw: 0100000000000200 ffff8880087a0c80 ffffea0000355380 dead000000000003 [ 39.301765] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e822001 [ 39.302718] page dumped because: kasan: bad access detected [ 39.303403] [ 39.303630] Memory state around the buggy address: [ 39.304220] ffff88800e75a200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.305090] ffff88800e75a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.305968] >ffff88800e75a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.306837] ^ [ 39.307311] ffff88800e75a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.308174] ffff88800e75a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.309044] ================================================================== [ 39.309963] Disabling lock debugging due to kernel taint [ 41.375513] BUG: Bad rss-counter state mm:000000002b154010 type:MM_FILEPAGES val:33 [ 41.376389] BUG: Bad rss-counter state mm:000000002b154010 type:MM_ANONPAGES val:22 [ 41.840253] BUG: Bad rss-counter state mm:00000000f0adb954 type:MM_FILEPAGES val:33 [ 41.841448] BUG: Bad rss-counter state mm:00000000f0adb954 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28972' (ECDSA) to the list of known hosts. 2023/06/21 04:27:16 fuzzer started 2023/06/21 04:27:16 dialing manager at localhost:36067 2023/06/21 04:27:16 checking machine... 2023/06/21 04:27:16 checking revisions... [ 42.634671] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:27:17 testing simple program... [ 42.677526] cgroup: Unknown subsys name 'net' [ 42.741114] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:27:16 Registers: info registers vcpu 0 RAX=0000000000000050 RBX=ffff8880096b8000 RCX=0000000000000000 RDX=00000000000101f7 RSI=ffffffff8219168b RDI=0000000000000007 RBP=ffffffff85a23960 RSP=ffff88800f457788 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f7 R11=0000000000000128 R12=00000000000101f7 R13=ffffed10012d7001 R14=dffffc0000000000 R15=ffff8880096b8060 RIP=ffffffff8219168f 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=00007f74a757b3e0 CR3=000000000e0cc000 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=2036313a37323a3430203132206e754a XMM01=6964206465766965636552203a5d3932 XMM02=6f63736964203a31313a343634313520 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a37323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff860d825b RBX=0000000000000001 RCX=ffffffff860d8256 RDX=0000000000000000 RSI=1ffffffff0c1b04b RDI=ffffffff85dbd7f8 RBP=ffff8880100671b0 RSP=ffff8880100670e8 R8 =ffffffff860d8256 R9 =ffff888010067198 R10=0000000000038001 R11=0000000000010b8d R12=ffff8880100671b8 R13=ffff8880100671a0 R14=ffff888010067199 R15=ffff888010067158 RIP=ffffffff81130a5b RFL=00000216 [----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 00007fd86cdf5900 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=00007fd86cdd4020 CR3=000000000ea76000 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=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