syzkaller login: [ 32.615085] BUG: Bad rss-counter state mm:0000000047a9c9df type:MM_FILEPAGES val:33 [ 32.616122] BUG: Bad rss-counter state mm:0000000047a9c9df type:MM_ANONPAGES val:22 [ 32.797757] ================================================================== [ 32.798798] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.800026] Read of size 8 at addr ffff8880168a44e0 by task sshd/221 [ 32.800918] [ 32.801168] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.802202] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.803329] Call Trace: [ 32.803705] [ 32.804040] dump_stack_lvl+0x91/0xf0 [ 32.804609] print_report+0xcc/0x620 [ 32.805213] ? __virt_addr_valid+0x102/0x340 [ 32.805872] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.806605] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.807340] kasan_report+0xbe/0xf0 [ 32.807904] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.808646] vma_interval_tree_remove+0xc75/0xec0 [ 32.809384] vma_prepare+0xc54/0x11a0 [ 32.809957] __split_vma+0x5af/0x950 [ 32.810520] ? __pfx___split_vma+0x10/0x10 [ 32.811158] ? find_held_lock+0x2c/0x110 [ 32.811780] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.812463] ? lock_is_held_type+0x9f/0x120 [ 32.813114] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.813833] ? mtree_range_walk+0x632/0x900 [ 32.814501] ? mas_walk+0x5c7/0x7c0 [ 32.815072] do_vmi_munmap+0x1f1/0x2b0 [ 32.815658] mmap_region+0x1f9/0x2660 [ 32.816240] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.816880] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.817745] ? __pfx_lock_acquire+0x10/0x10 [ 32.818385] ? __pfx_mmap_region+0x10/0x10 [ 32.819026] ? security_mmap_addr+0x7d/0xa0 [ 32.819666] ? get_unmapped_area+0x1f5/0x3f0 [ 32.820325] do_mmap+0x854/0xf00 [ 32.820866] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.821464] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.822139] ksys_mmap_pgoff+0x3af/0x500 [ 32.822738] do_syscall_64+0x3f/0x90 [ 32.823315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.824091] RIP: 0033:0x7fb559e9dd82 [ 32.824629] 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 [ 32.827201] RSP: 002b:00007ffd28dbdd48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.828287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb559e9dd82 [ 32.829309] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb5592d7000 [ 32.830327] RBP: 00007fb5592d7000 R08: 0000000000000009 R09: 0000000000001000 [ 32.831347] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dda0cb4ec0 [ 32.832363] R13: 00007ffd28dbdd60 R14: 00007ffd28dbdd90 R15: 00007ffd28dbe0f0 [ 32.833389] [ 32.833737] [ 32.833988] Allocated by task 213: [ 32.834493] kasan_save_stack+0x22/0x50 [ 32.835094] kasan_set_track+0x25/0x30 [ 32.835689] __kasan_slab_alloc+0x59/0x70 [ 32.836305] kmem_cache_alloc+0x16b/0x370 [ 32.836942] vm_area_dup+0x20/0x160 [ 32.837485] __split_vma+0x170/0x950 [ 32.838044] split_vma+0xc6/0x110 [ 32.838563] mprotect_fixup+0x8d2/0xb30 [ 32.839153] do_mprotect_pkey+0x87e/0xd40 [ 32.839771] __x64_sys_mprotect+0x78/0xc0 [ 32.840390] do_syscall_64+0x3f/0x90 [ 32.840971] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.841756] [ 32.842010] Freed by task 19: [ 32.842469] kasan_save_stack+0x22/0x50 [ 32.843069] kasan_set_track+0x25/0x30 [ 32.843656] kasan_save_free_info+0x2b/0x50 [ 32.844288] __kasan_slab_free+0x10a/0x190 [ 32.844942] kmem_cache_free+0x10d/0x4d0 [ 32.845537] rcu_core+0x8c8/0x2860 [ 32.846068] __do_softirq+0x1b7/0x7d4 [ 32.846630] [ 32.846885] Last potentially related work creation: [ 32.847579] kasan_save_stack+0x22/0x50 [ 32.848188] __kasan_record_aux_stack+0x8e/0xa0 [ 32.848879] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.849652] remove_vma+0x139/0x170 [ 32.850192] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.850857] do_vmi_munmap+0x1f1/0x2b0 [ 32.851436] __vm_munmap+0x138/0x3a0 [ 32.851987] __x64_sys_munmap+0x59/0x80 [ 32.852577] do_syscall_64+0x3f/0x90 [ 32.853150] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.853908] [ 32.854165] The buggy address belongs to the object at ffff8880168a4488 [ 32.854165] which belongs to the cache vm_area_struct of size 168 [ 32.855910] The buggy address is located 88 bytes inside of [ 32.855910] freed 168-byte region [ffff8880168a4488, ffff8880168a4530) [ 32.857601] [ 32.857856] The buggy address belongs to the physical page: [ 32.858644] page:00000000bdf2822a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x168a4 [ 32.859956] memcg:ffff888019e55e01 [ 32.860459] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.861228] page_type: 0xffffffff() [ 32.861768] raw: 0100000000000200 ffff88800879fc80 ffffea00003d0140 dead000000000004 [ 32.862851] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e55e01 [ 32.863925] page dumped because: kasan: bad access detected [ 32.864715] [ 32.864967] Memory state around the buggy address: [ 32.865655] ffff8880168a4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.866674] ffff8880168a4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.867691] >ffff8880168a4480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.868716] ^ [ 32.869617] ffff8880168a4500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 32.870627] ffff8880168a4580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.871624] ================================================================== [ 32.872894] Disabling lock debugging due to kernel taint [ 35.777425] BUG: Bad rss-counter state mm:00000000d72c35c1 type:MM_FILEPAGES val:33 [ 35.778405] BUG: Bad rss-counter state mm:00000000d72c35c1 type:MM_ANONPAGES val:22 [ 36.262980] BUG: Bad rss-counter state mm:0000000049c0e031 type:MM_FILEPAGES val:33 [ 36.263960] BUG: Bad rss-counter state mm:0000000049c0e031 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43309' (ECDSA) to the list of known hosts. 2023/06/19 23:44:21 fuzzer started 2023/06/19 23:44:21 dialing manager at localhost:44161 2023/06/19 23:44:21 checking machine... 2023/06/19 23:44:21 checking revisions... [ 36.898220] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:44:22 testing simple program... [ 36.952344] cgroup: Unknown subsys name 'net' [ 37.005957] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:44:19 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=00007ffcaacedaf8 CR3=0000000018da2000 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=2031323a34343a3332203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031323a34343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000002 RCX=0000000000000002 RDX=1ffff1100d9e135d RSI=ffff88806cf09fb8 RDI=ffff88806cf09ae8 RBP=ffff88801034fd38 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5c92 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09fb8 R15=ffff88806cf09a98 RIP=ffffffff81131266 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 00007f6ea233f900 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=00007f6aa3257650 CR3=000000000d958000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=35a18943757123f100000000000ae988 XMM05=d6e1e90fca4aaa250000000000134ee0 XMM06=19e9129bd510f2350000000000133d98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000