syzkaller login: [ 31.430001] BUG: Bad rss-counter state mm:000000004c4caba4 type:MM_FILEPAGES val:33 [ 31.431424] BUG: Bad rss-counter state mm:000000004c4caba4 type:MM_ANONPAGES val:22 [ 31.591222] ================================================================== [ 31.592109] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.593014] Read of size 8 at addr ffff88800dff9968 by task sshd/220 [ 31.593748] [ 31.593960] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.594971] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.595922] Call Trace: [ 31.596235] [ 31.596510] dump_stack_lvl+0x91/0xf0 [ 31.596997] print_report+0xcc/0x620 [ 31.597465] ? __virt_addr_valid+0x102/0x340 [ 31.597993] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.598597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.599217] kasan_report+0xbe/0xf0 [ 31.599679] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.600283] vma_interval_tree_remove+0xc75/0xec0 [ 31.600872] vma_prepare+0xc54/0x11a0 [ 31.601348] __split_vma+0x5af/0x950 [ 31.601834] ? __pfx___split_vma+0x10/0x10 [ 31.602372] ? find_held_lock+0x2c/0x110 [ 31.602890] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.603467] ? lock_is_held_type+0x9f/0x120 [ 31.604007] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.604611] ? mtree_range_walk+0x632/0x900 [ 31.605162] ? mas_walk+0x5c7/0x7c0 [ 31.605641] do_vmi_munmap+0x1f1/0x2b0 [ 31.606139] mmap_region+0x1f9/0x2660 [ 31.606630] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.607156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.607870] ? __pfx_lock_acquire+0x10/0x10 [ 31.608403] ? __pfx_mmap_region+0x10/0x10 [ 31.608935] ? security_mmap_addr+0x7d/0xa0 [ 31.609459] ? get_unmapped_area+0x1f5/0x3f0 [ 31.610005] do_mmap+0x854/0xf00 [ 31.610443] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.610943] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.611523] ksys_mmap_pgoff+0x3af/0x500 [ 31.612029] do_syscall_64+0x3f/0x90 [ 31.612513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.613169] RIP: 0033:0x7fbe57aa0d82 [ 31.613622] 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 [ 31.615752] RSP: 002b:00007ffce9bb41d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.616660] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe57aa0d82 [ 31.617506] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe56eda000 [ 31.618363] RBP: 00007fbe56eda000 R08: 0000000000000009 R09: 0000000000001000 [ 31.619219] R10: 0000000000000812 R11: 0000000000000206 R12: 00005564ca6deec0 [ 31.620060] R13: 00007ffce9bb41f0 R14: 00007ffce9bb4220 R15: 00007ffce9bb4580 [ 31.620924] [ 31.621211] [ 31.621427] Allocated by task 213: [ 31.621857] kasan_save_stack+0x22/0x50 [ 31.622354] kasan_set_track+0x25/0x30 [ 31.622850] __kasan_slab_alloc+0x59/0x70 [ 31.623385] kmem_cache_alloc+0x16b/0x370 [ 31.623896] vm_area_dup+0x20/0x160 [ 31.624498] __split_vma+0x170/0x950 [ 31.624976] split_vma+0xc6/0x110 [ 31.625421] mprotect_fixup+0x8d2/0xb30 [ 31.625945] do_mprotect_pkey+0x87e/0xd40 [ 31.626480] __x64_sys_mprotect+0x78/0xc0 [ 31.627019] do_syscall_64+0x3f/0x90 [ 31.627541] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.628206] [ 31.628435] Freed by task 213: [ 31.628834] kasan_save_stack+0x22/0x50 [ 31.629349] kasan_set_track+0x25/0x30 [ 31.629865] kasan_save_free_info+0x2b/0x50 [ 31.630416] __kasan_slab_free+0x10a/0x190 [ 31.630956] kmem_cache_free+0x10d/0x4d0 [ 31.631485] rcu_core+0x8c8/0x2860 [ 31.631938] __do_softirq+0x1b7/0x7d4 [ 31.632431] [ 31.632650] Last potentially related work creation: [ 31.633264] kasan_save_stack+0x22/0x50 [ 31.633793] __kasan_record_aux_stack+0x8e/0xa0 [ 31.634382] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.635065] remove_vma+0x139/0x170 [ 31.635573] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.636150] do_vmi_munmap+0x1f1/0x2b0 [ 31.636661] __vm_munmap+0x138/0x3a0 [ 31.637144] __x64_sys_munmap+0x59/0x80 [ 31.637657] do_syscall_64+0x3f/0x90 [ 31.638145] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.638809] [ 31.639028] Second to last potentially related work creation: [ 31.639749] kasan_save_stack+0x22/0x50 [ 31.640259] __kasan_record_aux_stack+0x8e/0xa0 [ 31.640857] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.641522] remove_vma+0x139/0x170 [ 31.641982] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.642567] do_vmi_munmap+0x1f1/0x2b0 [ 31.643065] mmap_region+0x1f9/0x2660 [ 31.643569] do_mmap+0x854/0xf00 [ 31.644021] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.644529] ksys_mmap_pgoff+0x3af/0x500 [ 31.645052] do_syscall_64+0x3f/0x90 [ 31.645549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.646227] [ 31.646449] The buggy address belongs to the object at ffff88800dff9910 [ 31.646449] which belongs to the cache vm_area_struct of size 168 [ 31.647992] The buggy address is located 88 bytes inside of [ 31.647992] freed 168-byte region [ffff88800dff9910, ffff88800dff99b8) [ 31.649438] [ 31.649657] The buggy address belongs to the physical page: [ 31.650333] page:000000004460fefa refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdff9 [ 31.651496] memcg:ffff88800ef6b301 [ 31.651942] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.652611] page_type: 0xffffffff() [ 31.653078] raw: 0100000000000200 ffff8880087a0c80 ffffea000025c240 dead000000000008 [ 31.654047] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef6b301 [ 31.655000] page dumped because: kasan: bad access detected [ 31.655701] [ 31.655923] Memory state around the buggy address: [ 31.656532] ffff88800dff9800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.657440] ffff88800dff9880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.658341] >ffff88800dff9900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.659228] ^ [ 31.660058] ffff88800dff9980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.660944] ffff88800dff9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.661839] ================================================================== [ 31.663047] Disabling lock debugging due to kernel taint [ 34.374489] BUG: Bad rss-counter state mm:00000000e41aa0bd type:MM_FILEPAGES val:33 [ 34.375817] BUG: Bad rss-counter state mm:00000000e41aa0bd type:MM_ANONPAGES val:22 [ 34.853492] BUG: Bad rss-counter state mm:000000007d7de97e type:MM_FILEPAGES val:33 [ 34.854724] BUG: Bad rss-counter state mm:000000007d7de97e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52167' (ECDSA) to the list of known hosts. 2023/06/20 23:49:08 fuzzer started 2023/06/20 23:49:08 dialing manager at localhost:36067 2023/06/20 23:49:08 checking machine... 2023/06/20 23:49:08 checking revisions... [ 35.520567] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:49:08 testing simple program... [ 35.569565] cgroup: Unknown subsys name 'net' [ 35.610412] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:49:08 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85da941c RCX=ffffffff81288ac4 RDX=0000000000000000 RSI=ffffffff860b9c62 RDI=ffffffff85da9400 RBP=ffffffff85da941c RSP=ffff88806ce099e0 R8 =ffffffff860b9c62 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffffffff85da9420 R13=ffffffff85da9400 R14=ffffffff85da9418 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 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=00007ffc855db5e8 CR3=0000000015c6c000 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=2038303a39343a3332203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a39343a3332203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0a59459 RBX=ffffffff852ca2b0 RCX=0000000000000000 RDX=ffff888015a21b40 RSI=ffffffff81ef4eb7 RDI=ffffffff852ca2c8 RBP=dffffc0000000000 RSP=ffff88801cb97da0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000006e R13=000000000000006e R14=ffff88801cb97e30 R15=ffff8880199a3f40 RIP=ffffffff81ef4ec6 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 00007fb7f59a2900 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=00007fb7f5f57650 CR3=000000000e208000 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