syzkaller login: [ 67.269462] BUG: Bad rss-counter state mm:00000000cb929129 type:MM_FILEPAGES val:33 [ 67.270031] BUG: Bad rss-counter state mm:00000000cb929129 type:MM_ANONPAGES val:22 [ 67.374941] ================================================================== [ 67.376017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 67.377020] Read of size 8 at addr ffff88800f2eca50 by task sshd/221 [ 67.377711] [ 67.377872] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 67.378631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 67.379370] Call Trace: [ 67.379605] <TASK> [ 67.379816] dump_stack_lvl+0x91/0xf0 [ 67.380183] print_report+0xcc/0x620 [ 67.380546] ? __virt_addr_valid+0x102/0x340 [ 67.380960] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.381429] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.381891] kasan_report+0xbe/0xf0 [ 67.382247] ? vma_interval_tree_remove+0xc75/0xec0 [ 67.382712] vma_interval_tree_remove+0xc75/0xec0 [ 67.383168] vma_prepare+0xc54/0x11a0 [ 67.383521] __split_vma+0x5af/0x950 [ 67.383869] ? __pfx___split_vma+0x10/0x10 [ 67.384271] ? find_held_lock+0x2c/0x110 [ 67.384665] do_vmi_align_munmap+0x2ba/0x11f0 [ 67.385084] ? lock_is_held_type+0x9f/0x120 [ 67.385491] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 67.385950] ? mtree_range_walk+0x632/0x900 [ 67.386362] ? mas_walk+0x5c7/0x7c0 [ 67.386716] do_vmi_munmap+0x1f1/0x2b0 [ 67.387082] mmap_region+0x1f9/0x2660 [ 67.387443] ? vm_mmap_pgoff+0x15c/0x3a0 [ 67.387829] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 67.388373] ? __pfx_lock_acquire+0x10/0x10 [ 67.388771] ? __pfx_mmap_region+0x10/0x10 [ 67.389091] ? security_mmap_addr+0x7d/0xa0 [ 67.389400] ? get_unmapped_area+0x1f5/0x3f0 [ 67.389721] do_mmap+0x854/0xf00 [ 67.389969] vm_mmap_pgoff+0x1a6/0x3a0 [ 67.390252] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 67.390573] ksys_mmap_pgoff+0x3af/0x500 [ 67.390864] do_syscall_64+0x3f/0x90 [ 67.391144] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.391516] RIP: 0033:0x7efe6ac72d82 [ 67.391782] 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 [ 67.393021] RSP: 002b:00007ffece1d8358 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 67.393538] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efe6ac72d82 [ 67.394022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efe6a0ac000 [ 67.394506] RBP: 00007efe6a0ac000 R08: 0000000000000009 R09: 0000000000001000 [ 67.394999] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b7719eec0 [ 67.395476] R13: 00007ffece1d8370 R14: 00007ffece1d83a0 R15: 00007ffece1d8700 [ 67.395982] </TASK> [ 67.396159] [ 67.396280] Allocated by task 214: [ 67.396525] kasan_save_stack+0x22/0x50 [ 67.396815] kasan_set_track+0x25/0x30 [ 67.397091] __kasan_slab_alloc+0x59/0x70 [ 67.397386] kmem_cache_alloc+0x16b/0x370 [ 67.397684] vm_area_dup+0x20/0x160 [ 67.397947] __split_vma+0x170/0x950 [ 67.398210] split_vma+0xc6/0x110 [ 67.398465] mprotect_fixup+0x8d2/0xb30 [ 67.398749] do_mprotect_pkey+0x87e/0xd40 [ 67.399047] __x64_sys_mprotect+0x78/0xc0 [ 67.399348] do_syscall_64+0x3f/0x90 [ 67.399616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.399983] [ 67.400117] Freed by task 214: [ 67.400341] kasan_save_stack+0x22/0x50 [ 67.400624] kasan_set_track+0x25/0x30 [ 67.400907] kasan_save_free_info+0x2b/0x50 [ 67.401212] __kasan_slab_free+0x10a/0x190 [ 67.401521] kmem_cache_free+0x10d/0x4d0 [ 67.401814] rcu_core+0x8c8/0x2860 [ 67.402071] __do_softirq+0x1b7/0x7d4 [ 67.402345] [ 67.402470] Last potentially related work creation: [ 67.402805] kasan_save_stack+0x22/0x50 [ 67.403095] __kasan_record_aux_stack+0x8e/0xa0 [ 67.403423] __call_rcu_common.constprop.0+0x6a/0xb90 [ 67.403794] remove_vma+0x139/0x170 [ 67.404058] do_vmi_align_munmap+0xd4a/0x11f0 [ 67.404374] do_vmi_munmap+0x1f1/0x2b0 [ 67.404651] __vm_munmap+0x138/0x3a0 [ 67.404914] __x64_sys_munmap+0x59/0x80 [ 67.405193] do_syscall_64+0x3f/0x90 [ 67.405458] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 67.405831] [ 67.405954] The buggy address belongs to the object at ffff88800f2ec9f8 [ 67.405954] which belongs to the cache vm_area_struct of size 168 [ 67.406796] The buggy address is located 88 bytes inside of [ 67.406796] freed 168-byte region [ffff88800f2ec9f8, ffff88800f2ecaa0) [ 67.407590] [ 67.407716] The buggy address belongs to the physical page: [ 67.408105] page:00000000ee89d640 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf2ec [ 67.408727] memcg:ffff88800f6cac01 [ 67.408974] flags: 0x100000000000200(slab|node=0|zone=1) [ 67.409349] page_type: 0xffffffff() [ 67.409608] raw: 0100000000000200 ffff88800879fc80 ffffea000056dc80 dead000000000004 [ 67.410136] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f6cac01 [ 67.410654] page dumped because: kasan: bad access detected [ 67.411028] [ 67.411150] Memory state around the buggy address: [ 67.411480] ffff88800f2ec900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.411973] ffff88800f2ec980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 67.412470] >ffff88800f2eca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 67.412948] ^ [ 67.413352] ffff88800f2eca80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 67.413851] ffff88800f2ecb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 67.414341] ================================================================== [ 67.414920] Disabling lock debugging due to kernel taint [ 69.731046] BUG: Bad rss-counter state mm:000000002ec89754 type:MM_FILEPAGES val:33 [ 69.732271] BUG: Bad rss-counter state mm:000000002ec89754 type:MM_ANONPAGES val:22 [ 70.120356] BUG: Bad rss-counter state mm:000000006da1eda1 type:MM_FILEPAGES val:33 [ 70.121357] BUG: Bad rss-counter state mm:000000006da1eda1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28680' (ECDSA) to the list of known hosts. 2023/06/19 14:31:03 fuzzer started 2023/06/19 14:31:03 dialing manager at localhost:44161 2023/06/19 14:31:03 checking machine... 2023/06/19 14:31:03 checking revisions... [ 70.848873] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:31:04 testing simple program... [ 70.902250] cgroup: Unknown subsys name 'net' [ 70.952067] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:30:26 Registers: info registers vcpu 0 RAX=ffff888015cc3490 RBX=ffff88800ea2fb18 RCX=1ffff11001d5b014 RDX=dffffc0000000000 RSI=ffff888015cc3450 RDI=ffff88800ea2fb48 RBP=ffff88800ead8070 RSP=ffff88800e94fc58 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff888015cc3318 R13=0000000000000000 R14=ffff88801a181178 R15=ffff88801a181130 RIP=ffffffff81847508 RFL=00000046 [---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 00007f8bc97ac900 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=000055d264f0d748 CR3=000000000990c000 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=ff0000000000ffff0000000000ff0000 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=0000000000000001 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=00007ffcec1fa668 CR3=000000000d890000 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=2033303a31333a3431203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a31333a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000