syzkaller login: [ 34.745893] BUG: Bad rss-counter state mm:000000006d35026a type:MM_FILEPAGES val:33 [ 34.747273] BUG: Bad rss-counter state mm:000000006d35026a type:MM_ANONPAGES val:22 [ 34.792851] ================================================================== [ 34.793950] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.795083] Read of size 8 at addr ffff888018c89310 by task sshd/221 [ 34.795947] [ 34.796175] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.797143] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.798294] Call Trace: [ 34.798651] [ 34.798960] dump_stack_lvl+0x91/0xf0 [ 34.799485] print_report+0xcc/0x620 [ 34.800003] ? __virt_addr_valid+0x102/0x340 [ 34.800596] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.801269] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.801940] kasan_report+0xbe/0xf0 [ 34.802453] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.803121] vma_interval_tree_remove+0xc75/0xec0 [ 34.803770] vma_prepare+0xc54/0x11a0 [ 34.804289] __split_vma+0x5af/0x950 [ 34.804823] ? __pfx___split_vma+0x10/0x10 [ 34.805394] ? find_held_lock+0x2c/0x110 [ 34.805953] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.806563] ? lock_is_held_type+0x9f/0x120 [ 34.807145] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.807798] ? mtree_range_walk+0x632/0x900 [ 34.808391] ? mas_walk+0x5c7/0x7c0 [ 34.808913] do_vmi_munmap+0x1f1/0x2b0 [ 34.809444] mmap_region+0x1f9/0x2660 [ 34.809964] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.810517] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.811291] ? __pfx_lock_acquire+0x10/0x10 [ 34.811867] ? __pfx_mmap_region+0x10/0x10 [ 34.812441] ? security_mmap_addr+0x7d/0xa0 [ 34.813021] ? get_unmapped_area+0x1f5/0x3f0 [ 34.813618] do_mmap+0x854/0xf00 [ 34.814091] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.814626] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.815233] ksys_mmap_pgoff+0x3af/0x500 [ 34.815783] do_syscall_64+0x3f/0x90 [ 34.816299] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.817008] RIP: 0033:0x7fbc8d2cfd82 [ 34.817498] 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 [ 34.819805] RSP: 002b:00007ffd75f7cc08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.820792] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc8d2cfd82 [ 34.821706] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc8c709000 [ 34.822617] RBP: 00007fbc8c709000 R08: 0000000000000009 R09: 0000000000001000 [ 34.823530] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f83f04d90 [ 34.824449] R13: 00007ffd75f7cc20 R14: 00007ffd75f7cc50 R15: 00007ffd75f7cfb0 [ 34.825399] [ 34.825717] [ 34.825949] Allocated by task 214: [ 34.826417] kasan_save_stack+0x22/0x50 [ 34.826961] kasan_set_track+0x25/0x30 [ 34.827495] __kasan_slab_alloc+0x59/0x70 [ 34.828063] kmem_cache_alloc+0x16b/0x370 [ 34.828628] vm_area_dup+0x20/0x160 [ 34.829121] __split_vma+0x170/0x950 [ 34.829625] split_vma+0xc6/0x110 [ 34.830103] mprotect_fixup+0x8d2/0xb30 [ 34.830640] do_mprotect_pkey+0x87e/0xd40 [ 34.831204] __x64_sys_mprotect+0x78/0xc0 [ 34.831764] do_syscall_64+0x3f/0x90 [ 34.832274] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.832983] [ 34.833217] Freed by task 214: [ 34.833638] kasan_save_stack+0x22/0x50 [ 34.834273] kasan_set_track+0x25/0x30 [ 34.834807] kasan_save_free_info+0x2b/0x50 [ 34.835385] __kasan_slab_free+0x10a/0x190 [ 34.835965] kmem_cache_free+0x10d/0x4d0 [ 34.836515] rcu_core+0x8c8/0x2860 [ 34.837003] __do_softirq+0x1b7/0x7d4 [ 34.837519] [ 34.837750] Last potentially related work creation: [ 34.838383] kasan_save_stack+0x22/0x50 [ 34.838929] __kasan_record_aux_stack+0x8e/0xa0 [ 34.839545] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.840241] remove_vma+0x139/0x170 [ 34.840747] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.841351] do_vmi_munmap+0x1f1/0x2b0 [ 34.841876] __vm_munmap+0x138/0x3a0 [ 34.842381] __x64_sys_munmap+0x59/0x80 [ 34.842919] do_syscall_64+0x3f/0x90 [ 34.843430] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.844125] [ 34.844359] Second to last potentially related work creation: [ 34.845109] kasan_save_stack+0x22/0x50 [ 34.845651] __kasan_record_aux_stack+0x8e/0xa0 [ 34.846271] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.846969] remove_vma+0x139/0x170 [ 34.847456] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.848059] do_vmi_munmap+0x1f1/0x2b0 [ 34.848582] mmap_region+0x1f9/0x2660 [ 34.849122] do_mmap+0x854/0xf00 [ 34.849589] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.850115] ksys_mmap_pgoff+0x3af/0x500 [ 34.850657] do_syscall_64+0x3f/0x90 [ 34.851167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.851855] [ 34.852090] The buggy address belongs to the object at ffff888018c892b8 [ 34.852090] which belongs to the cache vm_area_struct of size 168 [ 34.853681] The buggy address is located 88 bytes inside of [ 34.853681] freed 168-byte region [ffff888018c892b8, ffff888018c89360) [ 34.855204] [ 34.855439] The buggy address belongs to the physical page: [ 34.856153] page:0000000098501ab1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18c89 [ 34.857343] memcg:ffff888010013c01 [ 34.857806] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 34.858562] page_type: 0xffffffff() [ 34.859049] raw: 0100000000000200 ffff88800879fc80 ffffea0000363d40 dead000000000005 [ 34.860043] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010013c01 [ 34.861048] page dumped because: kasan: bad access detected [ 34.861765] [ 34.861998] Memory state around the buggy address: [ 34.862630] ffff888018c89200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.863560] ffff888018c89280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.864493] >ffff888018c89300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.865425] ^ [ 34.865928] ffff888018c89380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 34.866853] ffff888018c89400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 34.867778] ================================================================== [ 34.868837] Disabling lock debugging due to kernel taint [ 37.437121] BUG: Bad rss-counter state mm:0000000056d3e33d type:MM_FILEPAGES val:33 [ 37.437901] BUG: Bad rss-counter state mm:0000000056d3e33d type:MM_ANONPAGES val:22 [ 37.979533] BUG: Bad rss-counter state mm:00000000f003a89d type:MM_FILEPAGES val:33 [ 37.980744] BUG: Bad rss-counter state mm:00000000f003a89d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:50126' (ECDSA) to the list of known hosts. 2023/06/19 23:31:17 fuzzer started 2023/06/19 23:31:17 dialing manager at localhost:44161 2023/06/19 23:31:17 checking machine... 2023/06/19 23:31:17 checking revisions... [ 38.688319] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:31:17 testing simple program... [ 38.744451] cgroup: Unknown subsys name 'net' [ 38.793835] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:31:13 Registers: info registers vcpu 0 RAX=0000000080000001 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800d0cd1c0 RSI=ffffffff81711ce8 RDI=0000000000000001 RBP=ffff888017e2fd90 RSP=ffff888017e2fbf8 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=ffffea0000573b80 R13=ffff88800e37b658 R14=ffff888017e2fdb8 R15=ffffea0000573bb4 RIP=ffffffff814c0800 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f1f90016900 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=0000564afb992744 CR3=000000000c6de000 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=00000000000000000000564afb715060 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffe0f9bb698 CR3=0000000019dae000 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=2036313a31333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a31333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000