syzkaller login: [ 30.611190] BUG: Bad rss-counter state mm:00000000c3c78a5a type:MM_FILEPAGES val:33 [ 30.612439] BUG: Bad rss-counter state mm:00000000c3c78a5a type:MM_ANONPAGES val:22 [ 30.775824] ================================================================== [ 30.776866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.777807] Read of size 8 at addr ffff88801999d310 by task sshd/219 [ 30.778698] [ 30.778919] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.779793] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.780786] Call Trace: [ 30.781104] [ 30.781387] dump_stack_lvl+0x91/0xf0 [ 30.781879] print_report+0xcc/0x620 [ 30.782365] ? __virt_addr_valid+0x102/0x340 [ 30.782919] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.783540] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.784187] kasan_report+0xbe/0xf0 [ 30.784667] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.785292] vma_interval_tree_remove+0xc75/0xec0 [ 30.785901] vma_prepare+0xc54/0x11a0 [ 30.786397] __split_vma+0x5af/0x950 [ 30.786879] ? __pfx___split_vma+0x10/0x10 [ 30.787425] ? find_held_lock+0x2c/0x110 [ 30.787962] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.788543] ? lock_is_held_type+0x9f/0x120 [ 30.789094] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.789712] ? mtree_range_walk+0x632/0x900 [ 30.790271] ? mas_walk+0x5c7/0x7c0 [ 30.790752] do_vmi_munmap+0x1f1/0x2b0 [ 30.791254] mmap_region+0x1f9/0x2660 [ 30.791761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.792282] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.793009] ? __pfx_lock_acquire+0x10/0x10 [ 30.793543] ? __pfx_mmap_region+0x10/0x10 [ 30.794082] ? security_mmap_addr+0x7d/0xa0 [ 30.794623] ? get_unmapped_area+0x1f5/0x3f0 [ 30.795180] do_mmap+0x854/0xf00 [ 30.795643] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.796144] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.796710] ksys_mmap_pgoff+0x3af/0x500 [ 30.797219] do_syscall_64+0x3f/0x90 [ 30.797706] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.798351] RIP: 0033:0x7fc4e6585d82 [ 30.798817] 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 [ 30.801013] RSP: 002b:00007ffceef8c7d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.801923] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc4e6585d82 [ 30.802792] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc4e59bf000 [ 30.803666] RBP: 00007fc4e59bf000 R08: 0000000000000009 R09: 0000000000001000 [ 30.804531] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc060e9ec0 [ 30.805394] R13: 00007ffceef8c7f0 R14: 00007ffceef8c820 R15: 00007ffceef8cb80 [ 30.806271] [ 30.806568] [ 30.806784] Allocated by task 212: [ 30.807215] kasan_save_stack+0x22/0x50 [ 30.807736] kasan_set_track+0x25/0x30 [ 30.808241] __kasan_slab_alloc+0x59/0x70 [ 30.808770] kmem_cache_alloc+0x16b/0x370 [ 30.809293] vm_area_dup+0x20/0x160 [ 30.809752] __split_vma+0x170/0x950 [ 30.810218] split_vma+0xc6/0x110 [ 30.810673] mprotect_fixup+0x8d2/0xb30 [ 30.811177] do_mprotect_pkey+0x87e/0xd40 [ 30.811717] __x64_sys_mprotect+0x78/0xc0 [ 30.812238] do_syscall_64+0x3f/0x90 [ 30.812731] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.813381] [ 30.813598] Freed by task 202: [ 30.814005] kasan_save_stack+0x22/0x50 [ 30.814524] kasan_set_track+0x25/0x30 [ 30.815022] kasan_save_free_info+0x2b/0x50 [ 30.815560] __kasan_slab_free+0x10a/0x190 [ 30.816109] kmem_cache_free+0x10d/0x4d0 [ 30.816630] rcu_core+0x8c8/0x2860 [ 30.817078] __do_softirq+0x1b7/0x7d4 [ 30.817560] [ 30.817779] Last potentially related work creation: [ 30.818376] kasan_save_stack+0x22/0x50 [ 30.818886] __kasan_record_aux_stack+0x8e/0xa0 [ 30.819467] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.820200] remove_vma+0x139/0x170 [ 30.820673] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.821235] do_vmi_munmap+0x1f1/0x2b0 [ 30.821732] __vm_munmap+0x138/0x3a0 [ 30.822209] __x64_sys_munmap+0x59/0x80 [ 30.822712] do_syscall_64+0x3f/0x90 [ 30.823197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.823875] [ 30.824091] The buggy address belongs to the object at ffff88801999d2b8 [ 30.824091] which belongs to the cache vm_area_struct of size 168 [ 30.825600] The buggy address is located 88 bytes inside of [ 30.825600] freed 168-byte region [ffff88801999d2b8, ffff88801999d360) [ 30.827026] [ 30.827250] The buggy address belongs to the physical page: [ 30.827949] page:00000000f181e3ca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1999d [ 30.829082] memcg:ffff8880198ed101 [ 30.829524] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.830189] page_type: 0xffffffff() [ 30.830658] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.831645] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880198ed101 [ 30.832585] page dumped because: kasan: bad access detected [ 30.833267] [ 30.833490] Memory state around the buggy address: [ 30.834082] ffff88801999d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.834962] ffff88801999d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.835861] >ffff88801999d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.836738] ^ [ 30.837218] ffff88801999d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.838099] ffff88801999d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.838976] ================================================================== [ 30.839928] Disabling lock debugging due to kernel taint [ 33.564170] BUG: Bad rss-counter state mm:0000000026b2574f type:MM_FILEPAGES val:33 [ 33.565632] BUG: Bad rss-counter state mm:0000000026b2574f type:MM_ANONPAGES val:22 [ 34.028774] BUG: Bad rss-counter state mm:000000008b8790e9 type:MM_FILEPAGES val:33 [ 34.029519] BUG: Bad rss-counter state mm:000000008b8790e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15487' (ECDSA) to the list of known hosts. 2023/06/20 10:51:43 fuzzer started 2023/06/20 10:51:43 dialing manager at localhost:36067 2023/06/20 10:51:43 checking machine... 2023/06/20 10:51:43 checking revisions... [ 34.721901] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:51:43 testing simple program... [ 34.772488] cgroup: Unknown subsys name 'net' [ 34.810968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:51:43 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c857a RDI=ffff88800eff3a74 RBP=ffff88800eff3680 RSP=ffff8880165af4a8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff88800eff3680 R13=0000000000000000 R14=ffffffff85652d08 R15=00000000000000e8 RIP=ffffffff81374525 RFL=00000246 [---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 00007f519a9ba900 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=00007f519af71618 CR3=000000000ef4a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=ffff888008c04400 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=00007fe39f1629c0 CR3=0000000018570000 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=2033343a31353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a31353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000