syzkaller login: [ 43.443945] BUG: Bad rss-counter state mm:0000000052ab65d5 type:MM_FILEPAGES val:33 [ 43.444931] BUG: Bad rss-counter state mm:0000000052ab65d5 type:MM_ANONPAGES val:22 [ 43.612969] ================================================================== [ 43.614078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.615376] Read of size 8 at addr ffff88800e0edb38 by task sshd/220 [ 43.616305] [ 43.616594] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.617629] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.618842] Call Trace: [ 43.619235] [ 43.619526] dump_stack_lvl+0x91/0xf0 [ 43.620018] print_report+0xcc/0x620 [ 43.620539] ? __virt_addr_valid+0x102/0x340 [ 43.621129] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.621754] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.622408] kasan_report+0xbe/0xf0 [ 43.622890] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.623520] vma_interval_tree_remove+0xc75/0xec0 [ 43.624140] vma_prepare+0xc54/0x11a0 [ 43.624629] __split_vma+0x5af/0x950 [ 43.625116] ? __pfx___split_vma+0x10/0x10 [ 43.625649] ? find_held_lock+0x2c/0x110 [ 43.626221] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.626797] ? lock_is_held_type+0x9f/0x120 [ 43.627351] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.627957] ? mtree_range_walk+0x632/0x900 [ 43.628518] ? mas_walk+0x5c7/0x7c0 [ 43.628991] do_vmi_munmap+0x1f1/0x2b0 [ 43.629497] mmap_region+0x1f9/0x2660 [ 43.629995] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.630530] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.631272] ? __pfx_lock_acquire+0x10/0x10 [ 43.631834] ? __pfx_mmap_region+0x10/0x10 [ 43.632386] ? security_mmap_addr+0x7d/0xa0 [ 43.632937] ? get_unmapped_area+0x1f5/0x3f0 [ 43.633516] do_mmap+0x854/0xf00 [ 43.633969] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.634487] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.635095] ksys_mmap_pgoff+0x3af/0x500 [ 43.635628] do_syscall_64+0x3f/0x90 [ 43.636132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.636801] RIP: 0033:0x7fc8bbf78d82 [ 43.637282] 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 [ 43.639515] RSP: 002b:00007fff870737a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.640454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc8bbf78d82 [ 43.641366] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc8bb3b2000 [ 43.642258] RBP: 00007fc8bb3b2000 R08: 0000000000000009 R09: 0000000000001000 [ 43.643156] R10: 0000000000000812 R11: 0000000000000206 R12: 00005621355e2980 [ 43.644030] R13: 00007fff870737c0 R14: 00007fff870737f0 R15: 00007fff87073b50 [ 43.644911] [ 43.645232] [ 43.645455] Allocated by task 213: [ 43.645891] kasan_save_stack+0x22/0x50 [ 43.646444] kasan_set_track+0x25/0x30 [ 43.646955] __kasan_slab_alloc+0x59/0x70 [ 43.647539] kmem_cache_alloc+0x16b/0x370 [ 43.648092] vm_area_dup+0x20/0x160 [ 43.648564] __split_vma+0x170/0x950 [ 43.649068] split_vma+0xc6/0x110 [ 43.649534] mprotect_fixup+0x8d2/0xb30 [ 43.650094] do_mprotect_pkey+0x87e/0xd40 [ 43.650631] __x64_sys_mprotect+0x78/0xc0 [ 43.651194] do_syscall_64+0x3f/0x90 [ 43.651689] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.652386] [ 43.652611] Freed by task 213: [ 43.653019] kasan_save_stack+0x22/0x50 [ 43.653559] kasan_set_track+0x25/0x30 [ 43.654114] kasan_save_free_info+0x2b/0x50 [ 43.654673] __kasan_slab_free+0x10a/0x190 [ 43.655248] kmem_cache_free+0x10d/0x4d0 [ 43.655865] rcu_core+0x8c8/0x2860 [ 43.656344] __do_softirq+0x1b7/0x7d4 [ 43.656848] [ 43.657088] Last potentially related work creation: [ 43.657711] kasan_save_stack+0x22/0x50 [ 43.658261] __kasan_record_aux_stack+0x8e/0xa0 [ 43.658858] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.659544] remove_vma+0x139/0x170 [ 43.660019] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.660618] do_vmi_munmap+0x1f1/0x2b0 [ 43.661155] __vm_munmap+0x138/0x3a0 [ 43.661649] __x64_sys_munmap+0x59/0x80 [ 43.662192] do_syscall_64+0x3f/0x90 [ 43.662686] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.663366] [ 43.663590] The buggy address belongs to the object at ffff88800e0edae0 [ 43.663590] which belongs to the cache vm_area_struct of size 168 [ 43.665154] The buggy address is located 88 bytes inside of [ 43.665154] freed 168-byte region [ffff88800e0edae0, ffff88800e0edb88) [ 43.666693] [ 43.666921] The buggy address belongs to the physical page: [ 43.667624] page:000000009f20f846 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0ed [ 43.668773] memcg:ffff88800de4a501 [ 43.669233] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.669916] page_type: 0xffffffff() [ 43.670419] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.671412] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de4a501 [ 43.672377] page dumped because: kasan: bad access detected [ 43.673085] [ 43.673310] Memory state around the buggy address: [ 43.673910] ffff88800e0eda00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.674842] ffff88800e0eda80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 43.675765] >ffff88800e0edb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.676670] ^ [ 43.677322] ffff88800e0edb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 43.678245] ffff88800e0edc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 43.679142] ================================================================== [ 43.680122] Disabling lock debugging due to kernel taint [ 45.599455] BUG: Bad rss-counter state mm:0000000070b7b0ae type:MM_FILEPAGES val:33 [ 45.600780] BUG: Bad rss-counter state mm:0000000070b7b0ae type:MM_ANONPAGES val:22 [ 46.185649] BUG: Bad rss-counter state mm:00000000880d3346 type:MM_FILEPAGES val:33 [ 46.186915] BUG: Bad rss-counter state mm:00000000880d3346 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44341' (ECDSA) to the list of known hosts. 2023/06/20 02:02:11 fuzzer started 2023/06/20 02:02:11 dialing manager at localhost:44161 2023/06/20 02:02:11 checking machine... 2023/06/20 02:02:11 checking revisions... [ 46.826081] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:02:11 testing simple program... [ 46.877507] cgroup: Unknown subsys name 'net' [ 46.917109] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:01:58 Registers: info registers vcpu 0 RAX=ffff88806c400000 RBX=000000007040fab7 RCX=ffff88806c47d5b8 RDX=0000000000000011 RSI=0000000000000001 RDI=00000000bf757108 RBP=ffff88800be95430 RSP=ffff8880147c72e8 R8 =00000000f83babd2 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=0000000000092cc0 R14=ffff8880147c7350 R15=0000000000000011 RIP=ffffffff82270f2d 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 00007f41b7951900 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=00007f41b6de0bd0 CR3=000000000c774000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a62d832dc814f79e00000000000ae988 XMM05=db90bb7d907525b20000000000134aa0 XMM06=19e9129bd510f2350000000000133938 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8118d7fe RBX=ffffffff85d977cc RCX=ffffffff8118d7d8 RDX=0000000000000000 RSI=ffffffff8609f9ae RDI=ffffffff85d977c0 RBP=ffffffff85d977cc RSP=ffff888008e578a0 R8 =ffffffff8609f9ae R9 =ffff888008e57998 R10=0000000000038001 R11=00000000000078fb R12=ffffffff85d977c8 R13=ffffffff85d977c0 R14=0000000000000008 R15=dffffc0000000000 RIP=ffffffff8112fca7 RFL=00000202 [-------] 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 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=00007ff9aa142020 CR3=000000000c684000 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