syzkaller login: [ 30.155055] BUG: Bad rss-counter state mm:00000000fe42798d type:MM_FILEPAGES val:33 [ 30.156418] BUG: Bad rss-counter state mm:00000000fe42798d type:MM_ANONPAGES val:22 [ 30.319303] ================================================================== [ 30.320184] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.321095] Read of size 8 at addr ffff88800f03bb38 by task sshd/219 [ 30.321844] [ 30.322061] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.323016] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.323923] Call Trace: [ 30.324229] [ 30.324497] dump_stack_lvl+0x91/0xf0 [ 30.324993] print_report+0xcc/0x620 [ 30.325481] ? __virt_addr_valid+0x102/0x340 [ 30.326015] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.326599] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.327179] kasan_report+0xbe/0xf0 [ 30.327630] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.328218] vma_interval_tree_remove+0xc75/0xec0 [ 30.328786] vma_prepare+0xc54/0x11a0 [ 30.329239] __split_vma+0x5af/0x950 [ 30.329695] ? __pfx___split_vma+0x10/0x10 [ 30.330211] ? find_held_lock+0x2c/0x110 [ 30.330717] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.331275] ? lock_is_held_type+0x9f/0x120 [ 30.331799] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.332385] ? mtree_range_walk+0x632/0x900 [ 30.332925] ? mas_walk+0x5c7/0x7c0 [ 30.333391] do_vmi_munmap+0x1f1/0x2b0 [ 30.333891] mmap_region+0x1f9/0x2660 [ 30.334370] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.334866] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.335564] ? __pfx_lock_acquire+0x10/0x10 [ 30.336075] ? __pfx_mmap_region+0x10/0x10 [ 30.336590] ? security_mmap_addr+0x7d/0xa0 [ 30.337104] ? get_unmapped_area+0x1f5/0x3f0 [ 30.337654] do_mmap+0x854/0xf00 [ 30.338081] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.338567] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.339117] ksys_mmap_pgoff+0x3af/0x500 [ 30.339614] do_syscall_64+0x3f/0x90 [ 30.340075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.340705] RIP: 0033:0x7fe579048d82 [ 30.341154] 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 [ 30.343241] RSP: 002b:00007ffc72dda538 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.344117] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe579048d82 [ 30.344942] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe578482000 [ 30.345787] RBP: 00007fe578482000 R08: 0000000000000009 R09: 0000000000001000 [ 30.346623] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558d4bc4ff60 [ 30.347452] R13: 00007ffc72dda550 R14: 00007ffc72dda580 R15: 00007ffc72dda8e0 [ 30.348292] [ 30.348576] [ 30.348785] Allocated by task 212: [ 30.349202] kasan_save_stack+0x22/0x50 [ 30.349695] kasan_set_track+0x25/0x30 [ 30.350175] __kasan_slab_alloc+0x59/0x70 [ 30.350693] kmem_cache_alloc+0x16b/0x370 [ 30.351199] vm_area_dup+0x20/0x160 [ 30.351642] __split_vma+0x170/0x950 [ 30.352095] split_vma+0xc6/0x110 [ 30.352526] mprotect_fixup+0x8d2/0xb30 [ 30.353018] do_mprotect_pkey+0x87e/0xd40 [ 30.353535] __x64_sys_mprotect+0x78/0xc0 [ 30.354047] do_syscall_64+0x3f/0x90 [ 30.354501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.355153] [ 30.355364] Freed by task 212: [ 30.355745] kasan_save_stack+0x22/0x50 [ 30.356247] kasan_set_track+0x25/0x30 [ 30.356738] kasan_save_free_info+0x2b/0x50 [ 30.357264] __kasan_slab_free+0x10a/0x190 [ 30.357791] kmem_cache_free+0x10d/0x4d0 [ 30.358288] rcu_core+0x8c8/0x2860 [ 30.358725] __do_softirq+0x1b7/0x7d4 [ 30.359201] [ 30.359409] Last potentially related work creation: [ 30.359975] kasan_save_stack+0x22/0x50 [ 30.360464] __kasan_record_aux_stack+0x8e/0xa0 [ 30.361019] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.361681] remove_vma+0x139/0x170 [ 30.362130] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.362670] do_vmi_munmap+0x1f1/0x2b0 [ 30.363163] __vm_munmap+0x138/0x3a0 [ 30.363633] __x64_sys_munmap+0x59/0x80 [ 30.364111] do_syscall_64+0x3f/0x90 [ 30.364580] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.365203] [ 30.365417] The buggy address belongs to the object at ffff88800f03bae0 [ 30.365417] which belongs to the cache vm_area_struct of size 168 [ 30.366864] The buggy address is located 88 bytes inside of [ 30.366864] freed 168-byte region [ffff88800f03bae0, ffff88800f03bb88) [ 30.368241] [ 30.368451] The buggy address belongs to the physical page: [ 30.369086] page:000000007ecdbfe4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf03b [ 30.370165] memcg:ffff88800ee9d201 [ 30.370585] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.371206] page_type: 0xffffffff() [ 30.371648] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.372548] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ee9d201 [ 30.373438] page dumped because: kasan: bad access detected [ 30.374102] [ 30.374319] Memory state around the buggy address: [ 30.374899] ffff88800f03ba00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.375762] ffff88800f03ba80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.376616] >ffff88800f03bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.377485] ^ [ 30.378090] ffff88800f03bb80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.378926] ffff88800f03bc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.379769] ================================================================== [ 30.380674] Disabling lock debugging due to kernel taint [ 32.764251] BUG: Bad rss-counter state mm:0000000062f5ce36 type:MM_FILEPAGES val:33 [ 32.765428] BUG: Bad rss-counter state mm:0000000062f5ce36 type:MM_ANONPAGES val:22 [ 33.226299] BUG: Bad rss-counter state mm:00000000a6df241f type:MM_FILEPAGES val:33 [ 33.227467] BUG: Bad rss-counter state mm:00000000a6df241f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30436' (ECDSA) to the list of known hosts. 2023/06/21 07:16:15 fuzzer started 2023/06/21 07:16:15 dialing manager at localhost:36067 2023/06/21 07:16:15 checking machine... 2023/06/21 07:16:15 checking revisions... [ 33.848043] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:16:15 testing simple program... [ 33.890202] cgroup: Unknown subsys name 'net' [ 33.930220] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:16:15 Registers: info registers vcpu 0 RAX=1ffff11001afd7b5 RBX=ffff88800d7ebd78 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800d7ebda8 RBP=ffff88800978cac8 RSP=ffff888008d9fcb8 R8 =0000000000000001 R9 =ffffed10011b3f8b R10=0000000000000003 R11=0000000000000128 R12=dffffc0000000000 R13=ffff88800978ca10 R14=ffffffff813782f8 R15=ffff88800978ca10 RIP=ffffffff818464ec RFL=00000046 [---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 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=00007f6df957c650 CR3=000000000c55e000 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=36313a3730203132206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034313a3631 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383538 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff8121b48b RCX=ffffffff860a1201 RDX=1ffff110011c6f36 RSI=0000000000000000 RDI=ffffffff8121b48b RBP=ffffffff8121b48b RSP=ffff888008e37900 R8 =ffffffff860a12fa R9 =ffff888008e37998 R10=0000000000038001 R11=00000000000078fb R12=ffff888008e37a20 R13=0000000000000000 R14=ffff888008e0d1c0 R15=ffff8880197e5880 RIP=ffffffff811fc6f7 RFL=00000296 [--S-AP-] 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=00007f4e444637d0 CR3=000000000cdde000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000