syzkaller login: [ 30.517192] BUG: Bad rss-counter state mm:0000000021374b73 type:MM_FILEPAGES val:33 [ 30.518642] BUG: Bad rss-counter state mm:0000000021374b73 type:MM_ANONPAGES val:22 [ 30.668055] ================================================================== [ 30.669045] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.670047] Read of size 8 at addr ffff88800c7e86b0 by task sshd/220 [ 30.670996] [ 30.671255] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.672196] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.673253] Call Trace: [ 30.673599] [ 30.673907] dump_stack_lvl+0x91/0xf0 [ 30.674464] print_report+0xcc/0x620 [ 30.674990] ? __virt_addr_valid+0x102/0x340 [ 30.675582] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676253] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.676923] kasan_report+0xbe/0xf0 [ 30.677438] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.678110] vma_interval_tree_remove+0xc75/0xec0 [ 30.678770] vma_prepare+0xc54/0x11a0 [ 30.679285] __split_vma+0x5af/0x950 [ 30.679794] ? __pfx___split_vma+0x10/0x10 [ 30.680369] ? find_held_lock+0x2c/0x110 [ 30.680936] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.681553] ? lock_is_held_type+0x9f/0x120 [ 30.682136] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.682798] ? mtree_range_walk+0x632/0x900 [ 30.683401] ? mas_walk+0x5c7/0x7c0 [ 30.683910] do_vmi_munmap+0x1f1/0x2b0 [ 30.684448] mmap_region+0x1f9/0x2660 [ 30.684969] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.685535] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.686319] ? __pfx_lock_acquire+0x10/0x10 [ 30.686899] ? __pfx_mmap_region+0x10/0x10 [ 30.687473] ? security_mmap_addr+0x7d/0xa0 [ 30.688055] ? get_unmapped_area+0x1f5/0x3f0 [ 30.688651] do_mmap+0x854/0xf00 [ 30.689130] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.689671] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.690288] ksys_mmap_pgoff+0x3af/0x500 [ 30.690843] do_syscall_64+0x3f/0x90 [ 30.691365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.692068] RIP: 0033:0x7efdac13ed82 [ 30.692566] 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 [ 30.694876] RSP: 002b:00007ffeeb768f38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.695853] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdac13ed82 [ 30.696778] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efdab578000 [ 30.697694] RBP: 00007efdab578000 R08: 0000000000000009 R09: 0000000000001000 [ 30.698632] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558fa1992980 [ 30.699554] R13: 00007ffeeb768f50 R14: 00007ffeeb768f80 R15: 00007ffeeb7692e0 [ 30.700539] [ 30.700888] [ 30.701128] Allocated by task 213: [ 30.701585] kasan_save_stack+0x22/0x50 [ 30.702117] kasan_set_track+0x25/0x30 [ 30.702649] __kasan_slab_alloc+0x59/0x70 [ 30.703204] kmem_cache_alloc+0x16b/0x370 [ 30.703752] vm_area_dup+0x20/0x160 [ 30.704238] __split_vma+0x170/0x950 [ 30.704727] split_vma+0xc6/0x110 [ 30.705191] mprotect_fixup+0x8d2/0xb30 [ 30.705720] do_mprotect_pkey+0x87e/0xd40 [ 30.706292] __x64_sys_mprotect+0x78/0xc0 [ 30.706848] do_syscall_64+0x3f/0x90 [ 30.707355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.708039] [ 30.708271] Freed by task 213: [ 30.708687] kasan_save_stack+0x22/0x50 [ 30.709218] kasan_set_track+0x25/0x30 [ 30.709737] kasan_save_free_info+0x2b/0x50 [ 30.710311] __kasan_slab_free+0x10a/0x190 [ 30.710900] kmem_cache_free+0x10d/0x4d0 [ 30.711459] rcu_core+0x8c8/0x2860 [ 30.711940] __do_softirq+0x1b7/0x7d4 [ 30.712508] [ 30.712742] Last potentially related work creation: [ 30.713382] kasan_save_stack+0x22/0x50 [ 30.713938] __kasan_record_aux_stack+0x8e/0xa0 [ 30.714582] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.715355] remove_vma+0x139/0x170 [ 30.715858] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.716475] do_vmi_munmap+0x1f1/0x2b0 [ 30.717005] __vm_munmap+0x138/0x3a0 [ 30.717521] __x64_sys_munmap+0x59/0x80 [ 30.718061] do_syscall_64+0x3f/0x90 [ 30.718586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.719288] [ 30.719527] Second to last potentially related work creation: [ 30.720272] kasan_save_stack+0x22/0x50 [ 30.720820] __kasan_record_aux_stack+0x8e/0xa0 [ 30.721456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.722159] remove_vma+0x139/0x170 [ 30.722654] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.723266] do_vmi_munmap+0x1f1/0x2b0 [ 30.723802] mmap_region+0x1f9/0x2660 [ 30.724327] do_mmap+0x854/0xf00 [ 30.724803] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.725343] ksys_mmap_pgoff+0x3af/0x500 [ 30.725894] do_syscall_64+0x3f/0x90 [ 30.726431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.727135] [ 30.727371] The buggy address belongs to the object at ffff88800c7e8658 [ 30.727371] which belongs to the cache vm_area_struct of size 168 [ 30.728989] The buggy address is located 88 bytes inside of [ 30.728989] freed 168-byte region [ffff88800c7e8658, ffff88800c7e8700) [ 30.730563] [ 30.730799] The buggy address belongs to the physical page: [ 30.731527] page:000000004a829a47 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc7e8 [ 30.732719] memcg:ffff88800d92f001 [ 30.733184] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.733946] page_type: 0xffffffff() [ 30.734446] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a9b80 dead000000000003 [ 30.735452] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d92f001 [ 30.736452] page dumped because: kasan: bad access detected [ 30.737173] [ 30.737410] Memory state around the buggy address: [ 30.738050] ffff88800c7e8580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.738998] ffff88800c7e8600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.739938] >ffff88800c7e8680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.740867] ^ [ 30.741503] ffff88800c7e8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.742447] ffff88800c7e8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.743372] ================================================================== [ 30.744364] Disabling lock debugging due to kernel taint [ 33.126546] BUG: Bad rss-counter state mm:000000002ca2d40c type:MM_FILEPAGES val:33 [ 33.127532] BUG: Bad rss-counter state mm:000000002ca2d40c type:MM_ANONPAGES val:22 [ 33.634814] BUG: Bad rss-counter state mm:00000000abaeddfa type:MM_FILEPAGES val:33 [ 33.636703] BUG: Bad rss-counter state mm:00000000abaeddfa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64208' (ECDSA) to the list of known hosts. 2023/06/21 09:42:50 fuzzer started 2023/06/21 09:42:51 dialing manager at localhost:36067 2023/06/21 09:42:51 checking machine... 2023/06/21 09:42:51 checking revisions... [ 34.418810] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:42:51 testing simple program... [ 34.469739] cgroup: Unknown subsys name 'net' [ 34.521702] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:50 Registers: info registers vcpu 0 RAX=1ffff110018c3b43 RBX=ffff88800c61d9e8 RCX=ffffffff812e0135 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800c61da18 RBP=ffff88800fa0a800 RSP=ffff88800c4a7c18 R8 =0000000000000001 R9 =ffffed1001894f77 R10=0000000000000003 R11=0000000000120011 R12=dffffc0000000000 R13=ffff88800f6bda00 R14=ffffffff81803033 R15=000000008012000b RIP=ffffffff818464e2 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 00007f5f76a30900 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=00007f5f769e401c CR3=000000000c95a000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f03414eda00 CR3=000000000e860000 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=2030353a32343a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a32343a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000