syzkaller login: [ 30.603461] BUG: Bad rss-counter state mm:000000001ba0301a type:MM_FILEPAGES val:33 [ 30.604532] BUG: Bad rss-counter state mm:000000001ba0301a type:MM_ANONPAGES val:22 [ 30.772629] ================================================================== [ 30.773742] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.774841] Read of size 8 at addr ffff888016e68a50 by task sshd/219 [ 30.775837] [ 30.776082] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.776934] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.777880] Call Trace: [ 30.778193] [ 30.778471] dump_stack_lvl+0x91/0xf0 [ 30.778949] print_report+0xcc/0x620 [ 30.779443] ? __virt_addr_valid+0x102/0x340 [ 30.780000] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.780613] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.781237] kasan_report+0xbe/0xf0 [ 30.781707] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.782303] vma_interval_tree_remove+0xc75/0xec0 [ 30.782869] vma_prepare+0xc54/0x11a0 [ 30.783404] __split_vma+0x5af/0x950 [ 30.783849] ? __pfx___split_vma+0x10/0x10 [ 30.784358] ? find_held_lock+0x2c/0x110 [ 30.784910] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.785444] ? lock_is_held_type+0x9f/0x120 [ 30.785973] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.786551] ? mtree_range_walk+0x632/0x900 [ 30.787081] ? mas_walk+0x5c7/0x7c0 [ 30.787531] do_vmi_munmap+0x1f1/0x2b0 [ 30.788017] mmap_region+0x1f9/0x2660 [ 30.788500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.789073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.789849] ? __pfx_lock_acquire+0x10/0x10 [ 30.790445] ? __pfx_mmap_region+0x10/0x10 [ 30.791010] ? security_mmap_addr+0x7d/0xa0 [ 30.791576] ? get_unmapped_area+0x1f5/0x3f0 [ 30.792173] do_mmap+0x854/0xf00 [ 30.792654] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.793243] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.793855] ksys_mmap_pgoff+0x3af/0x500 [ 30.794383] do_syscall_64+0x3f/0x90 [ 30.794882] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795567] RIP: 0033:0x7f58f1e55d82 [ 30.796045] 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 [ 30.798317] RSP: 002b:00007ffe84743b28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.799301] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f58f1e55d82 [ 30.800243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f58f128f000 [ 30.801221] RBP: 00007f58f128f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.802095] R10: 0000000000000812 R11: 0000000000000206 R12: 00005566e669ed90 [ 30.802980] R13: 00007ffe84743b40 R14: 00007ffe84743b70 R15: 00007ffe84743ed0 [ 30.803859] [ 30.804157] [ 30.804377] Allocated by task 212: [ 30.804830] kasan_save_stack+0x22/0x50 [ 30.805354] kasan_set_track+0x25/0x30 [ 30.805870] __kasan_slab_alloc+0x59/0x70 [ 30.806409] kmem_cache_alloc+0x16b/0x370 [ 30.806959] vm_area_dup+0x20/0x160 [ 30.807441] __split_vma+0x170/0x950 [ 30.807951] split_vma+0xc6/0x110 [ 30.808472] mprotect_fixup+0x8d2/0xb30 [ 30.809033] do_mprotect_pkey+0x87e/0xd40 [ 30.809617] __x64_sys_mprotect+0x78/0xc0 [ 30.810138] do_syscall_64+0x3f/0x90 [ 30.810625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811301] [ 30.811530] Freed by task 212: [ 30.811936] kasan_save_stack+0x22/0x50 [ 30.812455] kasan_set_track+0x25/0x30 [ 30.813014] kasan_save_free_info+0x2b/0x50 [ 30.813555] __kasan_slab_free+0x10a/0x190 [ 30.814106] kmem_cache_free+0x10d/0x4d0 [ 30.814633] rcu_core+0x8c8/0x2860 [ 30.815095] __do_softirq+0x1b7/0x7d4 [ 30.815596] [ 30.815828] Last potentially related work creation: [ 30.816429] kasan_save_stack+0x22/0x50 [ 30.816970] __kasan_record_aux_stack+0x8e/0xa0 [ 30.817569] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.818236] remove_vma+0x139/0x170 [ 30.818705] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.819302] do_vmi_munmap+0x1f1/0x2b0 [ 30.819834] __vm_munmap+0x138/0x3a0 [ 30.820338] __x64_sys_munmap+0x59/0x80 [ 30.820891] do_syscall_64+0x3f/0x90 [ 30.821411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822096] [ 30.822342] The buggy address belongs to the object at ffff888016e689f8 [ 30.822342] which belongs to the cache vm_area_struct of size 168 [ 30.823922] The buggy address is located 88 bytes inside of [ 30.823922] freed 168-byte region [ffff888016e689f8, ffff888016e68aa0) [ 30.825447] [ 30.825692] The buggy address belongs to the physical page: [ 30.826377] page:000000001808e7e8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e68 [ 30.827529] memcg:ffff88800a01aa01 [ 30.827980] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.828663] page_type: 0xffffffff() [ 30.829136] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.830100] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a01aa01 [ 30.831067] page dumped because: kasan: bad access detected [ 30.831786] [ 30.832017] Memory state around the buggy address: [ 30.832622] ffff888016e68900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.833565] ffff888016e68980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.834473] >ffff888016e68a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.835382] ^ [ 30.836117] ffff888016e68a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.837028] ffff888016e68b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.837947] ================================================================== [ 30.839160] Disabling lock debugging due to kernel taint [ 32.787411] BUG: Bad rss-counter state mm:00000000e0daf6a6 type:MM_FILEPAGES val:33 [ 32.788674] BUG: Bad rss-counter state mm:00000000e0daf6a6 type:MM_ANONPAGES val:22 [ 33.271460] BUG: Bad rss-counter state mm:00000000fa91b1bf type:MM_FILEPAGES val:33 [ 33.272741] BUG: Bad rss-counter state mm:00000000fa91b1bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46455' (ECDSA) to the list of known hosts. 2023/06/20 15:07:42 fuzzer started 2023/06/20 15:07:42 dialing manager at localhost:36067 2023/06/20 15:07:42 checking machine... 2023/06/20 15:07:42 checking revisions... [ 33.926219] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:07:42 testing simple program... [ 33.955479] cgroup: Unknown subsys name 'net' [ 33.981690] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:07:42 Registers: info registers vcpu 0 RAX=1ffff11001c28e13 RBX=ffff88800e147068 RCX=ffffffff84536871 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800e1470a0 RBP=ffff88800dbaac80 RSP=ffff88806ce09db8 R8 =0000000000000001 R9 =fffffbfff0adb094 R10=ffffffff856d84a3 R11=0000000000000000 R12=dffffc0000000000 R13=ffff88800dbaac80 R14=ffffffff8186b835 R15=ffff88800fe02600 RIP=ffffffff818464f5 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 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=00007f75677a2180 CR3=000000000c51c000 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=2032343a37303a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a37303a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7aff RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88800ee2f640 R8 =ffffffff860d8256 R9 =ffff88800ee2f738 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fc0c476c900 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=00007ffd7bbf7000 CR3=000000001c8b6000 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