syzkaller login: [ 28.997752] BUG: Bad rss-counter state mm:00000000a9ecd1b0 type:MM_FILEPAGES val:33 [ 28.999195] BUG: Bad rss-counter state mm:00000000a9ecd1b0 type:MM_ANONPAGES val:22 [ 29.157875] ================================================================== [ 29.158799] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.159751] Read of size 8 at addr ffff888019c7a3f8 by task sshd/220 [ 29.160537] [ 29.160903] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 29.161788] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.162769] Call Trace: [ 29.163095] [ 29.163378] dump_stack_lvl+0x91/0xf0 [ 29.163878] print_report+0xcc/0x620 [ 29.164380] ? __virt_addr_valid+0x102/0x340 [ 29.164937] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.165551] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.166164] kasan_report+0xbe/0xf0 [ 29.166647] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.167282] vma_interval_tree_remove+0xc75/0xec0 [ 29.167893] vma_prepare+0xc54/0x11a0 [ 29.168405] __split_vma+0x5af/0x950 [ 29.168881] ? __pfx___split_vma+0x10/0x10 [ 29.169492] ? find_held_lock+0x2c/0x110 [ 29.170133] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.170831] ? lock_is_held_type+0x9f/0x120 [ 29.171499] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.172264] ? mtree_range_walk+0x632/0x900 [ 29.172943] ? mas_walk+0x5c7/0x7c0 [ 29.173525] do_vmi_munmap+0x1f1/0x2b0 [ 29.174135] mmap_region+0x1f9/0x2660 [ 29.174736] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.175367] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.176280] ? __pfx_lock_acquire+0x10/0x10 [ 29.176947] ? __pfx_mmap_region+0x10/0x10 [ 29.177492] ? security_mmap_addr+0x7d/0xa0 [ 29.178019] ? get_unmapped_area+0x1f5/0x3f0 [ 29.178569] do_mmap+0x854/0xf00 [ 29.179007] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.179514] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.180084] ksys_mmap_pgoff+0x3af/0x500 [ 29.180595] do_syscall_64+0x3f/0x90 [ 29.181079] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.181726] RIP: 0033:0x7f3ff4f00d82 [ 29.182190] 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 [ 29.184337] RSP: 002b:00007ffc36bc6418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.185250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3ff4f00d82 [ 29.186101] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3ff433a000 [ 29.186957] RBP: 00007f3ff433a000 R08: 0000000000000009 R09: 0000000000001000 [ 29.187801] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ec02a5aec0 [ 29.188660] R13: 00007ffc36bc6430 R14: 00007ffc36bc6460 R15: 00007ffc36bc67c0 [ 29.189515] [ 29.189809] [ 29.190024] Allocated by task 213: [ 29.190456] kasan_save_stack+0x22/0x50 [ 29.190956] kasan_set_track+0x25/0x30 [ 29.191459] __kasan_slab_alloc+0x59/0x70 [ 29.191979] kmem_cache_alloc+0x16b/0x370 [ 29.192519] vm_area_dup+0x20/0x160 [ 29.192977] __split_vma+0x170/0x950 [ 29.193442] split_vma+0xc6/0x110 [ 29.193884] mprotect_fixup+0x8d2/0xb30 [ 29.194393] do_mprotect_pkey+0x87e/0xd40 [ 29.194915] __x64_sys_mprotect+0x78/0xc0 [ 29.195447] do_syscall_64+0x3f/0x90 [ 29.195918] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.196574] [ 29.196789] Freed by task 213: [ 29.197183] kasan_save_stack+0x22/0x50 [ 29.197689] kasan_set_track+0x25/0x30 [ 29.198190] kasan_save_free_info+0x2b/0x50 [ 29.198720] __kasan_slab_free+0x10a/0x190 [ 29.199258] kmem_cache_free+0x10d/0x4d0 [ 29.199764] rcu_core+0x8c8/0x2860 [ 29.200219] __do_softirq+0x1b7/0x7d4 [ 29.200704] [ 29.200923] Last potentially related work creation: [ 29.201514] kasan_save_stack+0x22/0x50 [ 29.202081] __kasan_record_aux_stack+0x8e/0xa0 [ 29.202670] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.203324] remove_vma+0x139/0x170 [ 29.203774] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.204357] do_vmi_munmap+0x1f1/0x2b0 [ 29.204848] __vm_munmap+0x138/0x3a0 [ 29.205318] __x64_sys_munmap+0x59/0x80 [ 29.205827] do_syscall_64+0x3f/0x90 [ 29.206300] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.206947] [ 29.207162] The buggy address belongs to the object at ffff888019c7a3a0 [ 29.207162] which belongs to the cache vm_area_struct of size 168 [ 29.208641] The buggy address is located 88 bytes inside of [ 29.208641] freed 168-byte region [ffff888019c7a3a0, ffff888019c7a448) [ 29.210039] [ 29.210257] The buggy address belongs to the physical page: [ 29.210916] page:00000000054e5f9a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c7a [ 29.212012] memcg:ffff88800dd4fa01 [ 29.212445] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.213083] page_type: 0xffffffff() [ 29.213542] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 29.214456] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dd4fa01 [ 29.215363] page dumped because: kasan: bad access detected [ 29.216046] [ 29.216260] Memory state around the buggy address: [ 29.216839] ffff888019c7a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 29.217697] ffff888019c7a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 29.218558] >ffff888019c7a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 29.219406] ^ [ 29.220276] ffff888019c7a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 29.221122] ffff888019c7a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.221976] ================================================================== [ 29.222891] Disabling lock debugging due to kernel taint [ 31.061947] BUG: Bad rss-counter state mm:00000000ac1d80fe type:MM_FILEPAGES val:33 [ 31.063005] BUG: Bad rss-counter state mm:00000000ac1d80fe type:MM_ANONPAGES val:22 [ 31.521635] BUG: Bad rss-counter state mm:000000000dab740e type:MM_FILEPAGES val:33 [ 31.522693] BUG: Bad rss-counter state mm:000000000dab740e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40556' (ECDSA) to the list of known hosts. 2023/06/19 11:03:59 fuzzer started 2023/06/19 11:03:59 dialing manager at localhost:44161 2023/06/19 11:03:59 checking machine... 2023/06/19 11:03:59 checking revisions... [ 32.203930] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:03:59 testing simple program... [ 32.253126] cgroup: Unknown subsys name 'net' [ 32.293174] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:03:58 Registers: info registers vcpu 0 RAX=0000000080000102 RBX=00007f317076c2fd RCX=ffffffff813a0a8d RDX=ffff888014658000 RSI=0000000000000100 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff88806ce099d8 R8 =0000000000000006 R9 =00007f317076c2fd R10=ffffffffffffffff R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff888014658000 R15=ffff88800c577100 RIP=ffffffff814c07eb 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 00007f316fea2900 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=00007f316f32beb0 CR3=000000000c590000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=36bfd8dcad90fcf200000000000ae988 XMM05=129454d6552ccae60000000000135150 XMM06=4fda316b135da52b0000000000133f40 XMM07=fb795ef6d657705600000000001244d8 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=1ffff110017d7f3e RSI=1ffff110017d7f3c RDI=ffff88800bebf9f0 RBP=ffff88800bebf9e0 RSP=ffff88800bebf918 R8 =ffffffff864b9d5a R9 =ffff88800bebf9c8 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800bebf9e8 R13=ffff88800bebf9d0 R14=ffff88800bebff58 R15=ffff88800bebf988 RIP=ffffffff8113187c RFL=00000212 [----A--] 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 00007f0c181d9900 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=00007fffe11c3000 CR3=000000001c9fe000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000