syzkaller login: [ 34.412193] BUG: Bad rss-counter state mm:0000000035018871 type:MM_FILEPAGES val:33 [ 34.413419] BUG: Bad rss-counter state mm:0000000035018871 type:MM_ANONPAGES val:22 [ 34.454086] ================================================================== [ 34.455171] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.456178] Read of size 8 at addr ffff88800f53cdf0 by task sshd/219 [ 34.457013] [ 34.457235] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.458139] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.459214] Call Trace: [ 34.459540] [ 34.459825] dump_stack_lvl+0x91/0xf0 [ 34.460314] print_report+0xcc/0x620 [ 34.460801] ? __virt_addr_valid+0x102/0x340 [ 34.461383] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.462080] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.462747] kasan_report+0xbe/0xf0 [ 34.463222] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.463869] vma_interval_tree_remove+0xc75/0xec0 [ 34.464587] vma_prepare+0xc54/0x11a0 [ 34.465081] __split_vma+0x5af/0x950 [ 34.465550] ? __pfx___split_vma+0x10/0x10 [ 34.466074] ? find_held_lock+0x2c/0x110 [ 34.466645] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.467305] ? lock_is_held_type+0x9f/0x120 [ 34.467881] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.468487] ? mtree_range_walk+0x632/0x900 [ 34.469062] ? mas_walk+0x5c7/0x7c0 [ 34.469623] do_vmi_munmap+0x1f1/0x2b0 [ 34.470162] mmap_region+0x1f9/0x2660 [ 34.470658] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.471167] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.471871] ? __pfx_lock_acquire+0x10/0x10 [ 34.472485] ? __pfx_mmap_region+0x10/0x10 [ 34.473013] ? security_mmap_addr+0x7d/0xa0 [ 34.473542] ? get_unmapped_area+0x1f5/0x3f0 [ 34.474089] do_mmap+0x854/0xf00 [ 34.474566] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.475140] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.475736] ksys_mmap_pgoff+0x3af/0x500 [ 34.476247] do_syscall_64+0x3f/0x90 [ 34.476749] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.477495] RIP: 0033:0x7f771c907d82 [ 34.477963] 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 [ 34.480126] RSP: 002b:00007ffda6541968 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.481024] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f771c907d82 [ 34.481867] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f771bd41000 [ 34.482726] RBP: 00007f771bd41000 R08: 0000000000000009 R09: 0000000000001000 [ 34.483571] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fbacecec0 [ 34.484412] R13: 00007ffda6541980 R14: 00007ffda65419b0 R15: 00007ffda6541d10 [ 34.485260] [ 34.485547] [ 34.485759] Allocated by task 212: [ 34.486188] kasan_save_stack+0x22/0x50 [ 34.486703] kasan_set_track+0x25/0x30 [ 34.487192] __kasan_slab_alloc+0x59/0x70 [ 34.487712] kmem_cache_alloc+0x16b/0x370 [ 34.488220] vm_area_dup+0x20/0x160 [ 34.488674] __split_vma+0x170/0x950 [ 34.489135] split_vma+0xc6/0x110 [ 34.489567] mprotect_fixup+0x8d2/0xb30 [ 34.490065] do_mprotect_pkey+0x87e/0xd40 [ 34.490602] __x64_sys_mprotect+0x78/0xc0 [ 34.491116] do_syscall_64+0x3f/0x90 [ 34.491581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.492220] [ 34.492436] Freed by task 212: [ 34.492822] kasan_save_stack+0x22/0x50 [ 34.493315] kasan_set_track+0x25/0x30 [ 34.493799] kasan_save_free_info+0x2b/0x50 [ 34.494319] __kasan_slab_free+0x10a/0x190 [ 34.494859] kmem_cache_free+0x10d/0x4d0 [ 34.495368] rcu_core+0x8c8/0x2860 [ 34.495808] __do_softirq+0x1b7/0x7d4 [ 34.496277] [ 34.496488] Last potentially related work creation: [ 34.497078] kasan_save_stack+0x22/0x50 [ 34.497583] __kasan_record_aux_stack+0x8e/0xa0 [ 34.498158] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.498810] remove_vma+0x139/0x170 [ 34.499255] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.499805] do_vmi_munmap+0x1f1/0x2b0 [ 34.500285] __vm_munmap+0x138/0x3a0 [ 34.500760] __x64_sys_munmap+0x59/0x80 [ 34.501254] do_syscall_64+0x3f/0x90 [ 34.501724] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.502391] [ 34.502605] The buggy address belongs to the object at ffff88800f53cd98 [ 34.502605] which belongs to the cache vm_area_struct of size 168 [ 34.504072] The buggy address is located 88 bytes inside of [ 34.504072] freed 168-byte region [ffff88800f53cd98, ffff88800f53ce40) [ 34.505472] [ 34.505688] The buggy address belongs to the physical page: [ 34.506334] page:00000000d63b14ba refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf53c [ 34.507408] memcg:ffff8880147d2b01 [ 34.507825] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.508461] page_type: 0xffffffff() [ 34.508904] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.509809] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880147d2b01 [ 34.510722] page dumped because: kasan: bad access detected [ 34.511369] [ 34.511583] Memory state around the buggy address: [ 34.512158] ffff88800f53cc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 34.512998] ffff88800f53cd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 34.513839] >ffff88800f53cd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.514687] ^ [ 34.515482] ffff88800f53ce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.516322] ffff88800f53ce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.517158] ================================================================== [ 34.518197] Disabling lock debugging due to kernel taint [ 36.140977] BUG: Bad rss-counter state mm:00000000fee22553 type:MM_FILEPAGES val:33 [ 36.142497] BUG: Bad rss-counter state mm:00000000fee22553 type:MM_ANONPAGES val:22 [ 36.558163] BUG: Bad rss-counter state mm:00000000f3ae3fc4 type:MM_FILEPAGES val:33 [ 36.558910] BUG: Bad rss-counter state mm:00000000f3ae3fc4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53475' (ECDSA) to the list of known hosts. 2023/06/19 17:41:30 fuzzer started 2023/06/19 17:41:30 dialing manager at localhost:44161 2023/06/19 17:41:30 checking machine... 2023/06/19 17:41:30 checking revisions... [ 37.190589] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:41:30 testing simple program... [ 37.232441] cgroup: Unknown subsys name 'net' [ 37.284293] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:41:26 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007faf463f1910 CR3=000000000ed90000 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=00000000000000000000000000000000 XMM01=808753868ac252a4f84b58fb9c76a004 XMM02=ec2efd57dc4c00df000000000011cef8 XMM03=418741846fe890ae000000000011cfc8 XMM04=cd73aa74b480674000000000000ae988 XMM05=dfcdbad4f1609c370000000000133fe0 XMM06=806171799158d9670000000000133e68 XMM07=e042d86d42eb936e0000000000124650 XMM08=418741846fe890ae000000000011cfc8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff836382d7 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800fc9fb01 RSI=ffff88800fc9fb18 RDI=ffff88800fc9fb18 RBP=ffff88800fc9f4e8 RSP=ffff88800fc9f418 R8 =ffffffff863dc5fa R9 =ffff88800fc9f4d0 R10=0000000000038001 R11=0000000000091b07 R12=ffff88800fc9f4f0 R13=ffff88800fc9f4d8 R14=ffff88800fc9fb20 R15=ffff88800fc9f490 RIP=ffffffff8112fbf3 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 00007f646c2fa900 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=00007ffe0d5b4000 CR3=0000000018caa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000