syzkaller login: [ 61.203426] BUG: Bad rss-counter state mm:000000003bae9826 type:MM_FILEPAGES val:33 [ 61.204601] BUG: Bad rss-counter state mm:000000003bae9826 type:MM_ANONPAGES val:22 [ 61.242827] ================================================================== [ 61.243809] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 61.244867] Read of size 8 at addr ffff88801a17b968 by task sshd/229 [ 61.245627] [ 61.245848] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 61.246723] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 61.247695] Call Trace: [ 61.248014] [ 61.248294] dump_stack_lvl+0x91/0xf0 [ 61.248785] print_report+0xcc/0x620 [ 61.249273] ? __virt_addr_valid+0x102/0x340 [ 61.249826] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.250459] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.251070] kasan_report+0xbe/0xf0 [ 61.251550] ? vma_interval_tree_remove+0xc75/0xec0 [ 61.252160] vma_interval_tree_remove+0xc75/0xec0 [ 61.252758] vma_prepare+0xc54/0x11a0 [ 61.253231] __split_vma+0x5af/0x950 [ 61.253695] ? __pfx___split_vma+0x10/0x10 [ 61.254218] ? find_held_lock+0x2c/0x110 [ 61.254762] do_vmi_align_munmap+0x2ba/0x11f0 [ 61.255336] ? lock_is_held_type+0x9f/0x120 [ 61.255868] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 61.256470] ? mtree_range_walk+0x632/0x900 [ 61.257015] ? mas_walk+0x5c7/0x7c0 [ 61.257484] do_vmi_munmap+0x1f1/0x2b0 [ 61.257968] mmap_region+0x1f9/0x2660 [ 61.258467] ? vm_mmap_pgoff+0x15c/0x3a0 [ 61.258972] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 61.259671] ? __pfx_lock_acquire+0x10/0x10 [ 61.260202] ? __pfx_mmap_region+0x10/0x10 [ 61.260723] ? security_mmap_addr+0x7d/0xa0 [ 61.261256] ? get_unmapped_area+0x1f5/0x3f0 [ 61.261802] do_mmap+0x854/0xf00 [ 61.262243] vm_mmap_pgoff+0x1a6/0x3a0 [ 61.262745] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 61.263310] ksys_mmap_pgoff+0x3af/0x500 [ 61.263816] do_syscall_64+0x3f/0x90 [ 61.264296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.264944] RIP: 0033:0x7fec81a55d82 [ 61.265395] 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 [ 61.267542] RSP: 002b:00007ffd803cbdb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 61.268454] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fec81a55d82 [ 61.269302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fec80e8f000 [ 61.270147] RBP: 00007fec80e8f000 R08: 0000000000000009 R09: 0000000000001000 [ 61.271014] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b03627b980 [ 61.271854] R13: 00007ffd803cbdd0 R14: 00007ffd803cbe00 R15: 00007ffd803cc160 [ 61.272707] [ 61.272997] [ 61.273209] Allocated by task 222: [ 61.273634] kasan_save_stack+0x22/0x50 [ 61.274129] kasan_set_track+0x25/0x30 [ 61.274623] __kasan_slab_alloc+0x59/0x70 [ 61.275138] kmem_cache_alloc+0x16b/0x370 [ 61.275646] vm_area_dup+0x20/0x160 [ 61.276115] __split_vma+0x170/0x950 [ 61.276579] split_vma+0xc6/0x110 [ 61.277013] mprotect_fixup+0x8d2/0xb30 [ 61.277515] do_mprotect_pkey+0x87e/0xd40 [ 61.278039] __x64_sys_mprotect+0x78/0xc0 [ 61.278569] do_syscall_64+0x3f/0x90 [ 61.279045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.279681] [ 61.279896] Freed by task 222: [ 61.280286] kasan_save_stack+0x22/0x50 [ 61.280784] kasan_set_track+0x25/0x30 [ 61.281269] kasan_save_free_info+0x2b/0x50 [ 61.281793] __kasan_slab_free+0x10a/0x190 [ 61.282325] kmem_cache_free+0x10d/0x4d0 [ 61.282833] rcu_core+0x8c8/0x2860 [ 61.283273] __do_softirq+0x1b7/0x7d4 [ 61.283743] [ 61.283958] Last potentially related work creation: [ 61.284544] kasan_save_stack+0x22/0x50 [ 61.285047] __kasan_record_aux_stack+0x8e/0xa0 [ 61.285623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 61.286257] remove_vma+0x139/0x170 [ 61.286722] do_vmi_align_munmap+0xd4a/0x11f0 [ 61.287277] do_vmi_munmap+0x1f1/0x2b0 [ 61.287764] __vm_munmap+0x138/0x3a0 [ 61.288228] __x64_sys_munmap+0x59/0x80 [ 61.288734] do_syscall_64+0x3f/0x90 [ 61.289209] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 61.289851] [ 61.290065] The buggy address belongs to the object at ffff88801a17b910 [ 61.290065] which belongs to the cache vm_area_struct of size 168 [ 61.291552] The buggy address is located 88 bytes inside of [ 61.291552] freed 168-byte region [ffff88801a17b910, ffff88801a17b9b8) [ 61.292950] [ 61.293165] The buggy address belongs to the physical page: [ 61.293849] page:00000000640e8f39 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a17b [ 61.294971] memcg:ffff8880142b6501 [ 61.295416] flags: 0x100000000000200(slab|node=0|zone=1) [ 61.296086] page_type: 0xffffffff() [ 61.296554] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 61.297507] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880142b6501 [ 61.298464] page dumped because: kasan: bad access detected [ 61.299142] [ 61.299365] Memory state around the buggy address: [ 61.299965] ffff88801a17b800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 61.300850] ffff88801a17b880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 61.301728] >ffff88801a17b900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.302626] ^ [ 61.303432] ffff88801a17b980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 61.304330] ffff88801a17ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 61.305206] ================================================================== [ 61.306566] Disabling lock debugging due to kernel taint [ 63.500795] BUG: Bad rss-counter state mm:0000000088e37b57 type:MM_FILEPAGES val:33 [ 63.502332] BUG: Bad rss-counter state mm:0000000088e37b57 type:MM_ANONPAGES val:22 [ 63.990252] BUG: Bad rss-counter state mm:0000000015c5a01e type:MM_FILEPAGES val:33 [ 63.991279] BUG: Bad rss-counter state mm:0000000015c5a01e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46168' (ECDSA) to the list of known hosts. 2023/06/20 15:13:15 fuzzer started 2023/06/20 15:13:15 dialing manager at localhost:36067 2023/06/20 15:13:15 checking machine... 2023/06/20 15:13:15 checking revisions... [ 64.692803] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:13:15 testing simple program... [ 64.739493] cgroup: Unknown subsys name 'net' [ 64.789074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:13:15 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffe0b7a3b08 CR3=0000000019d68000 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=2034313a33313a3531203032206e754a XMM01=73732878696e755f6d6170203a5d3833 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3833325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a33313a3531203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888019a4c500 RCX=0000000000000000 RDX=ffff888015e8d1c0 RSI=ffffffff83635ac5 RDI=0000000000000005 RBP=ffff888016b2fe60 RSP=ffff888016b2fb18 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=0000000000000000 R14=ffff888016b2fe88 R15=ffff888016b2fea4 RIP=ffffffff814c089b 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 00007f592a4d7900 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=00007ffde2702000 CR3=000000000e398000 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