syzkaller login: [ 30.184504] BUG: Bad rss-counter state mm:00000000e09e2bbb type:MM_FILEPAGES val:33 [ 30.185501] BUG: Bad rss-counter state mm:00000000e09e2bbb type:MM_ANONPAGES val:22 [ 30.346960] ================================================================== [ 30.347864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.348805] Read of size 8 at addr ffff88800c5a3c20 by task sshd/220 [ 30.349566] [ 30.349788] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.350822] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.351799] Call Trace: [ 30.352121] [ 30.352408] dump_stack_lvl+0x91/0xf0 [ 30.352924] print_report+0xcc/0x620 [ 30.353407] ? __virt_addr_valid+0x102/0x340 [ 30.353962] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.354603] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.355218] kasan_report+0xbe/0xf0 [ 30.355695] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.356319] vma_interval_tree_remove+0xc75/0xec0 [ 30.356925] vma_prepare+0xc54/0x11a0 [ 30.357403] __split_vma+0x5af/0x950 [ 30.357874] ? __pfx___split_vma+0x10/0x10 [ 30.358413] ? find_held_lock+0x2c/0x110 [ 30.358934] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.359498] ? lock_is_held_type+0x9f/0x120 [ 30.360039] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.360641] ? mtree_range_walk+0x632/0x900 [ 30.361194] ? mas_walk+0x5c7/0x7c0 [ 30.361670] do_vmi_munmap+0x1f1/0x2b0 [ 30.362168] mmap_region+0x1f9/0x2660 [ 30.362650] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.363158] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.363867] ? __pfx_lock_acquire+0x10/0x10 [ 30.364404] ? __pfx_mmap_region+0x10/0x10 [ 30.364930] ? security_mmap_addr+0x7d/0xa0 [ 30.365458] ? get_unmapped_area+0x1f5/0x3f0 [ 30.366008] do_mmap+0x854/0xf00 [ 30.366474] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.366969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.367531] ksys_mmap_pgoff+0x3af/0x500 [ 30.368043] do_syscall_64+0x3f/0x90 [ 30.368526] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.369175] RIP: 0033:0x7ff5a6e6ed82 [ 30.369633] 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 [ 30.371770] RSP: 002b:00007ffc92cecaa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.372674] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff5a6e6ed82 [ 30.373529] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff5a62a8000 [ 30.374395] RBP: 00007ff5a62a8000 R08: 0000000000000009 R09: 0000000000001000 [ 30.375248] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fd02288d90 [ 30.376099] R13: 00007ffc92cecac0 R14: 00007ffc92cecaf0 R15: 00007ffc92cece50 [ 30.376965] [ 30.377256] [ 30.377474] Allocated by task 213: [ 30.377901] kasan_save_stack+0x22/0x50 [ 30.378421] kasan_set_track+0x25/0x30 [ 30.378915] __kasan_slab_alloc+0x59/0x70 [ 30.379437] kmem_cache_alloc+0x16b/0x370 [ 30.379952] vm_area_dup+0x20/0x160 [ 30.380412] __split_vma+0x170/0x950 [ 30.380883] split_vma+0xc6/0x110 [ 30.381329] mprotect_fixup+0x8d2/0xb30 [ 30.381830] do_mprotect_pkey+0x87e/0xd40 [ 30.382365] __x64_sys_mprotect+0x78/0xc0 [ 30.382888] do_syscall_64+0x3f/0x90 [ 30.383358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.384002] [ 30.384217] Freed by task 213: [ 30.384611] kasan_save_stack+0x22/0x50 [ 30.385112] kasan_set_track+0x25/0x30 [ 30.385605] kasan_save_free_info+0x2b/0x50 [ 30.386146] __kasan_slab_free+0x10a/0x190 [ 30.386680] kmem_cache_free+0x10d/0x4d0 [ 30.387193] rcu_core+0x8c8/0x2860 [ 30.387635] __do_softirq+0x1b7/0x7d4 [ 30.388111] [ 30.388325] Last potentially related work creation: [ 30.388913] kasan_save_stack+0x22/0x50 [ 30.389413] __kasan_record_aux_stack+0x8e/0xa0 [ 30.389988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.390656] remove_vma+0x139/0x170 [ 30.391100] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.391659] do_vmi_munmap+0x1f1/0x2b0 [ 30.392141] __vm_munmap+0x138/0x3a0 [ 30.392606] __x64_sys_munmap+0x59/0x80 [ 30.393102] do_syscall_64+0x3f/0x90 [ 30.393576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.394236] [ 30.394451] The buggy address belongs to the object at ffff88800c5a3bc8 [ 30.394451] which belongs to the cache vm_area_struct of size 168 [ 30.395913] The buggy address is located 88 bytes inside of [ 30.395913] freed 168-byte region [ffff88800c5a3bc8, ffff88800c5a3c70) [ 30.397319] [ 30.397534] The buggy address belongs to the physical page: [ 30.398206] page:00000000d3acb23a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc5a3 [ 30.399292] memcg:ffff88800eb64201 [ 30.399720] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.400368] page_type: 0xffffffff() [ 30.400818] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.401735] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb64201 [ 30.402661] page dumped because: kasan: bad access detected [ 30.403322] [ 30.403541] Memory state around the buggy address: [ 30.404121] ffff88800c5a3b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.404985] ffff88800c5a3b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.405839] >ffff88800c5a3c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.406704] ^ [ 30.407235] ffff88800c5a3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.408089] ffff88800c5a3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.408948] ================================================================== [ 30.410091] Disabling lock debugging due to kernel taint [ 33.165184] BUG: Bad rss-counter state mm:00000000a6d8c2c7 type:MM_FILEPAGES val:33 [ 33.166357] BUG: Bad rss-counter state mm:00000000a6d8c2c7 type:MM_ANONPAGES val:22 [ 33.645959] BUG: Bad rss-counter state mm:000000008d312b44 type:MM_FILEPAGES val:33 [ 33.647111] BUG: Bad rss-counter state mm:000000008d312b44 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4429' (ECDSA) to the list of known hosts. 2023/06/20 16:04:08 fuzzer started 2023/06/20 16:04:08 dialing manager at localhost:36067 2023/06/20 16:04:08 checking machine... 2023/06/20 16:04:08 checking revisions... [ 34.279128] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:04:09 testing simple program... [ 34.319708] cgroup: Unknown subsys name 'net' [ 34.357348] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:04:08 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fff7c535f98 CR3=000000000f256000 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=2038303a34303a3631203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a34303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800da9d1c0 RBX=ffff88806cf09b30 RCX=ffffffff81132ffe RDX=ffff88806cf09a48 RSI=0000000000000000 RDI=ffff88806cf09b08 RBP=ffff88800da9d1c0 RSP=ffff88806cf09a48 R8 =0000000000000003 R9 =0000000000000000 R10=ffff88806cf09a98 R11=00000000000b6a61 R12=0000000000000000 R13=ffff88806cf09ac0 R14=ffff88806cf09ae0 R15=ffff88806cf09a98 RIP=ffffffff81133014 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 00007f4bba0a1900 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=00007f4bba6590b0 CR3=000000000e852000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000