syzkaller login: [ 30.604024] BUG: Bad rss-counter state mm:0000000000e40a0b type:MM_FILEPAGES val:33 [ 30.605520] BUG: Bad rss-counter state mm:0000000000e40a0b type:MM_ANONPAGES val:22 [ 30.762698] ================================================================== [ 30.763627] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.764591] Read of size 8 at addr ffff88800f7ec968 by task sshd/220 [ 30.765368] [ 30.765648] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.766533] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.767522] Call Trace: [ 30.767912] [ 30.768288] dump_stack_lvl+0x91/0xf0 [ 30.768895] print_report+0xcc/0x620 [ 30.769478] ? __virt_addr_valid+0x102/0x340 [ 30.770146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.770902] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.771659] kasan_report+0xbe/0xf0 [ 30.772258] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.773011] vma_interval_tree_remove+0xc75/0xec0 [ 30.773747] vma_prepare+0xc54/0x11a0 [ 30.774324] __split_vma+0x5af/0x950 [ 30.774901] ? __pfx___split_vma+0x10/0x10 [ 30.775552] ? find_held_lock+0x2c/0x110 [ 30.776213] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.776797] ? lock_is_held_type+0x9f/0x120 [ 30.777333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.777930] ? mtree_range_walk+0x632/0x900 [ 30.778488] ? mas_walk+0x5c7/0x7c0 [ 30.778963] do_vmi_munmap+0x1f1/0x2b0 [ 30.779456] mmap_region+0x1f9/0x2660 [ 30.779959] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.780485] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.781212] ? __pfx_lock_acquire+0x10/0x10 [ 30.781758] ? __pfx_mmap_region+0x10/0x10 [ 30.782288] ? security_mmap_addr+0x7d/0xa0 [ 30.782823] ? get_unmapped_area+0x1f5/0x3f0 [ 30.783393] do_mmap+0x854/0xf00 [ 30.783828] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.784348] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.784907] ksys_mmap_pgoff+0x3af/0x500 [ 30.785414] do_syscall_64+0x3f/0x90 [ 30.785889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.786535] RIP: 0033:0x7f5101bf9d82 [ 30.787000] 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 [ 30.789124] RSP: 002b:00007ffd15c7ee38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.790034] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5101bf9d82 [ 30.790893] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5101033000 [ 30.791739] RBP: 00007f5101033000 R08: 0000000000000009 R09: 0000000000001000 [ 30.792612] R10: 0000000000000812 R11: 0000000000000206 R12: 000055da536eeec0 [ 30.793471] R13: 00007ffd15c7ee50 R14: 00007ffd15c7ee80 R15: 00007ffd15c7f1e0 [ 30.794332] [ 30.794624] [ 30.794837] Allocated by task 213: [ 30.795266] kasan_save_stack+0x22/0x50 [ 30.795767] kasan_set_track+0x25/0x30 [ 30.796273] __kasan_slab_alloc+0x59/0x70 [ 30.796808] kmem_cache_alloc+0x16b/0x370 [ 30.797330] vm_area_dup+0x20/0x160 [ 30.797788] __split_vma+0x170/0x950 [ 30.798258] split_vma+0xc6/0x110 [ 30.798695] mprotect_fixup+0x8d2/0xb30 [ 30.799200] do_mprotect_pkey+0x87e/0xd40 [ 30.799726] __x64_sys_mprotect+0x78/0xc0 [ 30.800276] do_syscall_64+0x3f/0x90 [ 30.800757] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.801411] [ 30.801624] Freed by task 213: [ 30.802012] kasan_save_stack+0x22/0x50 [ 30.802521] kasan_set_track+0x25/0x30 [ 30.803020] kasan_save_free_info+0x2b/0x50 [ 30.803554] __kasan_slab_free+0x10a/0x190 [ 30.804111] kmem_cache_free+0x10d/0x4d0 [ 30.804615] rcu_core+0x8c8/0x2860 [ 30.805065] __do_softirq+0x1b7/0x7d4 [ 30.805541] [ 30.805756] Last potentially related work creation: [ 30.806338] kasan_save_stack+0x22/0x50 [ 30.806844] __kasan_record_aux_stack+0x8e/0xa0 [ 30.807415] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.808057] remove_vma+0x139/0x170 [ 30.808512] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.809068] do_vmi_munmap+0x1f1/0x2b0 [ 30.809553] __vm_munmap+0x138/0x3a0 [ 30.810027] __x64_sys_munmap+0x59/0x80 [ 30.810530] do_syscall_64+0x3f/0x90 [ 30.811016] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.811660] [ 30.811884] The buggy address belongs to the object at ffff88800f7ec910 [ 30.811884] which belongs to the cache vm_area_struct of size 168 [ 30.813390] The buggy address is located 88 bytes inside of [ 30.813390] freed 168-byte region [ffff88800f7ec910, ffff88800f7ec9b8) [ 30.814798] [ 30.815016] The buggy address belongs to the physical page: [ 30.815677] page:00000000fc2b4ebc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7ec [ 30.816765] memcg:ffff8880147d5a01 [ 30.817186] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.817827] page_type: 0xffffffff() [ 30.818273] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.819183] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147d5a01 [ 30.820086] page dumped because: kasan: bad access detected [ 30.820752] [ 30.820969] Memory state around the buggy address: [ 30.821552] ffff88800f7ec800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.822399] ffff88800f7ec880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.823248] >ffff88800f7ec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.824102] ^ [ 30.824873] ffff88800f7ec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 30.825722] ffff88800f7eca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.826566] ================================================================== [ 30.827585] Disabling lock debugging due to kernel taint [ 32.792962] BUG: Bad rss-counter state mm:0000000079d72eea type:MM_FILEPAGES val:33 [ 32.793945] BUG: Bad rss-counter state mm:0000000079d72eea type:MM_ANONPAGES val:22 [ 33.261895] BUG: Bad rss-counter state mm:00000000761555a5 type:MM_FILEPAGES val:33 [ 33.263352] BUG: Bad rss-counter state mm:00000000761555a5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5728' (ECDSA) to the list of known hosts. 2023/06/20 22:36:25 fuzzer started 2023/06/20 22:36:25 dialing manager at localhost:36067 2023/06/20 22:36:25 checking machine... 2023/06/20 22:36:25 checking revisions... [ 34.034693] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:36:25 testing simple program... [ 34.085664] cgroup: Unknown subsys name 'net' [ 34.131710] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:36:25 Registers: info registers vcpu 0 RAX=ffffffff8180c705 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff1100d9c135e RSI=ffffffff8180c705 RDI=ffff88806ce09b60 RBP=ffff88806ce09b30 RSP=ffff88806ce09a90 R8 =ffffffff86138e90 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888017cd0000 R15=ffff88800faa4200 RIP=ffffffff84538440 RFL=00000286 [--S--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 00007fd7326e1900 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=0000558c49890954 CR3=000000000cc28000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00007ffe8b471358 CR3=000000000db4e000 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=2035323a36333a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a36333a3232203032 XMM08=303d64696720303d64697520612f6e3d XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000