syzkaller login: [ 39.922117] BUG: Bad rss-counter state mm:00000000cafb3cc1 type:MM_FILEPAGES val:33 [ 39.923326] BUG: Bad rss-counter state mm:00000000cafb3cc1 type:MM_ANONPAGES val:22 [ 40.080760] ================================================================== [ 40.081692] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.082642] Read of size 8 at addr ffff888016438ed8 by task sshd/219 [ 40.083414] [ 40.083630] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.084682] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.085676] Call Trace: [ 40.085996] [ 40.086313] dump_stack_lvl+0x91/0xf0 [ 40.086808] print_report+0xcc/0x620 [ 40.087309] ? __virt_addr_valid+0x102/0x340 [ 40.087895] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.088525] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.089153] kasan_report+0xbe/0xf0 [ 40.089629] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.090262] vma_interval_tree_remove+0xc75/0xec0 [ 40.090874] vma_prepare+0xc54/0x11a0 [ 40.091355] __split_vma+0x5af/0x950 [ 40.091829] ? __pfx___split_vma+0x10/0x10 [ 40.092372] ? find_held_lock+0x2c/0x110 [ 40.092890] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.093460] ? lock_is_held_type+0x9f/0x120 [ 40.093997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.094610] ? mtree_range_walk+0x632/0x900 [ 40.095163] ? mas_walk+0x5c7/0x7c0 [ 40.095636] do_vmi_munmap+0x1f1/0x2b0 [ 40.096142] mmap_region+0x1f9/0x2660 [ 40.096628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.097145] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.097859] ? __pfx_lock_acquire+0x10/0x10 [ 40.098397] ? __pfx_mmap_region+0x10/0x10 [ 40.098936] ? security_mmap_addr+0x7d/0xa0 [ 40.099478] ? get_unmapped_area+0x1f5/0x3f0 [ 40.100050] do_mmap+0x854/0xf00 [ 40.100491] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.100992] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.101564] ksys_mmap_pgoff+0x3af/0x500 [ 40.102069] do_syscall_64+0x3f/0x90 [ 40.102552] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.103206] RIP: 0033:0x7f6b4ebf6d82 [ 40.103671] 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 [ 40.105852] RSP: 002b:00007ffc9be8af78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.106779] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6b4ebf6d82 [ 40.107633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6b4e030000 [ 40.108487] RBP: 00007f6b4e030000 R08: 0000000000000009 R09: 0000000000001000 [ 40.109339] R10: 0000000000000812 R11: 0000000000000206 R12: 00005623e7981ec0 [ 40.110187] R13: 00007ffc9be8af90 R14: 00007ffc9be8afc0 R15: 00007ffc9be8b320 [ 40.111039] [ 40.111337] [ 40.111555] Allocated by task 212: [ 40.112016] kasan_save_stack+0x22/0x50 [ 40.112523] kasan_set_track+0x25/0x30 [ 40.113024] __kasan_slab_alloc+0x59/0x70 [ 40.113553] kmem_cache_alloc+0x16b/0x370 [ 40.114078] vm_area_dup+0x20/0x160 [ 40.114534] __split_vma+0x170/0x950 [ 40.115034] split_vma+0xc6/0x110 [ 40.115476] mprotect_fixup+0x8d2/0xb30 [ 40.115993] do_mprotect_pkey+0x87e/0xd40 [ 40.116524] __x64_sys_mprotect+0x78/0xc0 [ 40.117057] do_syscall_64+0x3f/0x90 [ 40.117539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.118212] [ 40.118433] Freed by task 203: [ 40.118828] kasan_save_stack+0x22/0x50 [ 40.119353] kasan_set_track+0x25/0x30 [ 40.119850] kasan_save_free_info+0x2b/0x50 [ 40.120419] __kasan_slab_free+0x10a/0x190 [ 40.120957] kmem_cache_free+0x10d/0x4d0 [ 40.121476] rcu_core+0x8c8/0x2860 [ 40.121928] __do_softirq+0x1b7/0x7d4 [ 40.122419] [ 40.122644] Last potentially related work creation: [ 40.123234] kasan_save_stack+0x22/0x50 [ 40.123747] __kasan_record_aux_stack+0x8e/0xa0 [ 40.124350] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.125019] remove_vma+0x139/0x170 [ 40.125555] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.126133] do_vmi_munmap+0x1f1/0x2b0 [ 40.126636] __vm_munmap+0x138/0x3a0 [ 40.127121] __x64_sys_munmap+0x59/0x80 [ 40.127636] do_syscall_64+0x3f/0x90 [ 40.128144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.128797] [ 40.129018] The buggy address belongs to the object at ffff888016438e80 [ 40.129018] which belongs to the cache vm_area_struct of size 168 [ 40.130525] The buggy address is located 88 bytes inside of [ 40.130525] freed 168-byte region [ffff888016438e80, ffff888016438f28) [ 40.131987] [ 40.132208] The buggy address belongs to the physical page: [ 40.132886] page:00000000a31d1efc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16438 [ 40.134009] memcg:ffff88800e02c201 [ 40.134443] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.135098] page_type: 0xffffffff() [ 40.135558] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 40.136514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e02c201 [ 40.137447] page dumped because: kasan: bad access detected [ 40.138127] [ 40.138347] Memory state around the buggy address: [ 40.138943] ffff888016438d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 40.139804] ffff888016438e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 40.140716] >ffff888016438e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.141562] ^ [ 40.142289] ffff888016438f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 40.143149] ffff888016438f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 40.144037] ================================================================== [ 40.144967] Disabling lock debugging due to kernel taint [ 42.153043] BUG: Bad rss-counter state mm:000000009e9e9666 type:MM_FILEPAGES val:33 [ 42.154171] BUG: Bad rss-counter state mm:000000009e9e9666 type:MM_ANONPAGES val:22 [ 42.625086] BUG: Bad rss-counter state mm:0000000075b6a2b4 type:MM_FILEPAGES val:33 [ 42.626249] BUG: Bad rss-counter state mm:0000000075b6a2b4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6677' (ECDSA) to the list of known hosts. 2023/06/20 06:04:43 fuzzer started 2023/06/20 06:04:43 dialing manager at localhost:44161 2023/06/20 06:04:43 checking machine... 2023/06/20 06:04:43 checking revisions... [ 43.353717] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:04:43 testing simple program... [ 43.399941] cgroup: Unknown subsys name 'net' [ 43.454310] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:04:42 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=800000001d91c067 RCX=0000000000000000 RDX=1ffff11001cfefbe RSI=ffffffff81141c44 RDI=ffff8880146a7a20 RBP=ffff88800e7f7d90 RSP=ffff88800e7f7c00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff88801af251d0 R14=000056490d8f5000 R15=800000001d91c067 RIP=ffffffff817109a9 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 00007fa7a6c40900 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=000056490d8f5744 CR3=000000000e832000 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=0000000000000000000056490c8fa060 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=dffffc0000000000 RBX=ffff8880102ef8c0 RCX=0000000000000000 RDX=1ffff1100205df18 RSI=ffffffff81b2ca71 RDI=0000000000000001 RBP=ffff88800c185828 RSP=ffff8880102ef618 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6c88 R12=ffff88800ff20000 R13=ffff88800ff20018 R14=ffff88800ff20138 R15=0000000000000001 RIP=ffffffff81b2ca86 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 00007f4ca50da900 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=00007f4ca44dbde0 CR3=000000000c7d0000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=14ee93c49e07ca9e00000000000ae988 XMM05=ac6ce856bdf9d9d60000000000135a68 XMM06=4fda316b135da52b0000000000134858 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000