syzkaller login: [ 32.933224] BUG: Bad rss-counter state mm:00000000e5a4ebca type:MM_FILEPAGES val:33 [ 32.934505] BUG: Bad rss-counter state mm:00000000e5a4ebca type:MM_ANONPAGES val:22 [ 33.095009] ================================================================== [ 33.096113] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.097373] Read of size 8 at addr ffff88800dcc8798 by task sshd/220 [ 33.098251] [ 33.098482] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.099394] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.100438] Call Trace: [ 33.100775] [ 33.101078] dump_stack_lvl+0x91/0xf0 [ 33.101596] print_report+0xcc/0x620 [ 33.102124] ? __virt_addr_valid+0x102/0x340 [ 33.102711] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.103378] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.104042] kasan_report+0xbe/0xf0 [ 33.104563] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.105222] vma_interval_tree_remove+0xc75/0xec0 [ 33.105896] vma_prepare+0xc54/0x11a0 [ 33.106413] __split_vma+0x5af/0x950 [ 33.106924] ? __pfx___split_vma+0x10/0x10 [ 33.107505] ? find_held_lock+0x2c/0x110 [ 33.108113] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.108696] ? lock_is_held_type+0x9f/0x120 [ 33.109240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.109874] ? mtree_range_walk+0x632/0x900 [ 33.110436] ? mas_walk+0x5c7/0x7c0 [ 33.110916] do_vmi_munmap+0x1f1/0x2b0 [ 33.111412] mmap_region+0x1f9/0x2660 [ 33.111904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.112420] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.113138] ? __pfx_lock_acquire+0x10/0x10 [ 33.113701] ? __pfx_mmap_region+0x10/0x10 [ 33.114237] ? security_mmap_addr+0x7d/0xa0 [ 33.114777] ? get_unmapped_area+0x1f5/0x3f0 [ 33.115330] do_mmap+0x854/0xf00 [ 33.115782] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.116282] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.116856] ksys_mmap_pgoff+0x3af/0x500 [ 33.117420] do_syscall_64+0x3f/0x90 [ 33.117970] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.118685] RIP: 0033:0x7fd2cd6abd82 [ 33.119196] 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 [ 33.121562] RSP: 002b:00007fffc0d2fed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.122589] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd2cd6abd82 [ 33.123541] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd2ccae5000 [ 33.124485] RBP: 00007fd2ccae5000 R08: 0000000000000009 R09: 0000000000001000 [ 33.125430] R10: 0000000000000812 R11: 0000000000000206 R12: 00005610bd6fbec0 [ 33.126386] R13: 00007fffc0d2fef0 R14: 00007fffc0d2ff20 R15: 00007fffc0d30280 [ 33.127339] [ 33.127662] [ 33.127898] Allocated by task 213: [ 33.128371] kasan_save_stack+0x22/0x50 [ 33.128926] kasan_set_track+0x25/0x30 [ 33.129469] __kasan_slab_alloc+0x59/0x70 [ 33.130057] kmem_cache_alloc+0x16b/0x370 [ 33.130625] vm_area_dup+0x20/0x160 [ 33.131128] __split_vma+0x170/0x950 [ 33.131641] split_vma+0xc6/0x110 [ 33.132125] mprotect_fixup+0x8d2/0xb30 [ 33.132688] do_mprotect_pkey+0x87e/0xd40 [ 33.133268] __x64_sys_mprotect+0x78/0xc0 [ 33.133867] do_syscall_64+0x3f/0x90 [ 33.134395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.135112] [ 33.135348] Freed by task 13: [ 33.135775] kasan_save_stack+0x22/0x50 [ 33.136334] kasan_set_track+0x25/0x30 [ 33.136887] kasan_save_free_info+0x2b/0x50 [ 33.137482] __kasan_slab_free+0x10a/0x190 [ 33.138224] kmem_cache_free+0x10d/0x4d0 [ 33.138793] rcu_core+0x8c8/0x2860 [ 33.139291] __do_softirq+0x1b7/0x7d4 [ 33.139824] [ 33.140060] Last potentially related work creation: [ 33.140712] kasan_save_stack+0x22/0x50 [ 33.141273] __kasan_record_aux_stack+0x8e/0xa0 [ 33.141933] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.142648] remove_vma+0x139/0x170 [ 33.143147] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.143769] do_vmi_munmap+0x1f1/0x2b0 [ 33.144311] __vm_munmap+0x138/0x3a0 [ 33.144832] __x64_sys_munmap+0x59/0x80 [ 33.145387] do_syscall_64+0x3f/0x90 [ 33.145923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.146639] [ 33.146877] Second to last potentially related work creation: [ 33.147635] kasan_save_stack+0x22/0x50 [ 33.148200] __kasan_record_aux_stack+0x8e/0xa0 [ 33.148843] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.149556] remove_vma+0x139/0x170 [ 33.150068] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.150689] do_vmi_munmap+0x1f1/0x2b0 [ 33.151236] mmap_region+0x1f9/0x2660 [ 33.151768] do_mmap+0x854/0xf00 [ 33.152248] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.152795] ksys_mmap_pgoff+0x3af/0x500 [ 33.153354] do_syscall_64+0x3f/0x90 [ 33.153904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.154620] [ 33.154858] The buggy address belongs to the object at ffff88800dcc8740 [ 33.154858] which belongs to the cache vm_area_struct of size 168 [ 33.156505] The buggy address is located 88 bytes inside of [ 33.156505] freed 168-byte region [ffff88800dcc8740, ffff88800dcc87e8) [ 33.158076] [ 33.158316] The buggy address belongs to the physical page: [ 33.159054] page:00000000f069ed7d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdcc8 [ 33.160270] memcg:ffff88800ceaec01 [ 33.160745] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 33.161520] page_type: 0xffffffff() [ 33.162031] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 33.163062] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ceaec01 [ 33.164071] page dumped because: kasan: bad access detected [ 33.164809] [ 33.165043] Memory state around the buggy address: [ 33.165711] ffff88800dcc8680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.166671] ffff88800dcc8700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 33.167630] >ffff88800dcc8780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 33.168584] ^ [ 33.169136] ffff88800dcc8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 33.170100] ffff88800dcc8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 33.171055] ================================================================== [ 33.172245] Disabling lock debugging due to kernel taint [ 35.127776] BUG: Bad rss-counter state mm:0000000031d0a1d7 type:MM_FILEPAGES val:33 [ 35.128665] BUG: Bad rss-counter state mm:0000000031d0a1d7 type:MM_ANONPAGES val:22 [ 35.597795] BUG: Bad rss-counter state mm:00000000d43f1c6a type:MM_FILEPAGES val:33 [ 35.599528] BUG: Bad rss-counter state mm:00000000d43f1c6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19197' (ECDSA) to the list of known hosts. 2023/06/19 17:39:11 fuzzer started 2023/06/19 17:39:11 dialing manager at localhost:44161 2023/06/19 17:39:11 checking machine... 2023/06/19 17:39:11 checking revisions... [ 36.368204] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:39:11 testing simple program... [ 36.418903] cgroup: Unknown subsys name 'net' [ 36.455968] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:08 Registers: info registers vcpu 0 RAX=ffff88806ce36180 RBX=ffff88800fe8bc80 RCX=ffff888014658000 RDX=0000000000000140 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff888008fce000 RSP=ffff888016a17910 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffffea00003fa2c0 R14=ffffffff8366dfdf R15=0000000000000000 RIP=ffffffff81810562 RFL=00000086 [--S--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 00007fa1732d8900 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=00007fa17388f618 CR3=000000000f80a000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f45a3109260 CR3=0000000018e94000 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=39333a3731203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383432 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000