syzkaller login: [ 38.694501] BUG: Bad rss-counter state mm:00000000a702aeaa type:MM_FILEPAGES val:33 [ 38.696111] BUG: Bad rss-counter state mm:00000000a702aeaa type:MM_ANONPAGES val:22 [ 38.845313] ================================================================== [ 38.846232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.847177] Read of size 8 at addr ffff88801809d310 by task sshd/220 [ 38.847964] [ 38.848185] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.849161] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.850165] Call Trace: [ 38.850499] [ 38.850793] dump_stack_lvl+0x91/0xf0 [ 38.851289] print_report+0xcc/0x620 [ 38.851780] ? __virt_addr_valid+0x102/0x340 [ 38.852347] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.852999] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.853623] kasan_report+0xbe/0xf0 [ 38.854100] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.854730] vma_interval_tree_remove+0xc75/0xec0 [ 38.855348] vma_prepare+0xc54/0x11a0 [ 38.855827] __split_vma+0x5af/0x950 [ 38.856306] ? __pfx___split_vma+0x10/0x10 [ 38.856835] ? find_held_lock+0x2c/0x110 [ 38.857376] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.857960] ? lock_is_held_type+0x9f/0x120 [ 38.858502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.859125] ? mtree_range_walk+0x632/0x900 [ 38.859692] ? mas_walk+0x5c7/0x7c0 [ 38.860167] do_vmi_munmap+0x1f1/0x2b0 [ 38.860669] mmap_region+0x1f9/0x2660 [ 38.861167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.861676] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.862392] ? __pfx_lock_acquire+0x10/0x10 [ 38.862938] ? __pfx_mmap_region+0x10/0x10 [ 38.863472] ? security_mmap_addr+0x7d/0xa0 [ 38.864014] ? get_unmapped_area+0x1f5/0x3f0 [ 38.864563] do_mmap+0x854/0xf00 [ 38.865032] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.865535] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.866108] ksys_mmap_pgoff+0x3af/0x500 [ 38.866626] do_syscall_64+0x3f/0x90 [ 38.867110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.867766] RIP: 0033:0x7f888c75cd82 [ 38.868230] 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 [ 38.870433] RSP: 002b:00007ffdd7f2edb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.871342] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f888c75cd82 [ 38.872208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f888bb96000 [ 38.873079] RBP: 00007f888bb96000 R08: 0000000000000009 R09: 0000000000001000 [ 38.873922] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e077b30ec0 [ 38.874765] R13: 00007ffdd7f2edd0 R14: 00007ffdd7f2ee00 R15: 00007ffdd7f2f160 [ 38.875629] [ 38.875932] [ 38.876146] Allocated by task 213: [ 38.876579] kasan_save_stack+0x22/0x50 [ 38.877121] kasan_set_track+0x25/0x30 [ 38.877621] __kasan_slab_alloc+0x59/0x70 [ 38.878156] kmem_cache_alloc+0x16b/0x370 [ 38.878673] vm_area_dup+0x20/0x160 [ 38.879130] __split_vma+0x170/0x950 [ 38.879604] split_vma+0xc6/0x110 [ 38.880051] mprotect_fixup+0x8d2/0xb30 [ 38.880556] do_mprotect_pkey+0x87e/0xd40 [ 38.881090] __x64_sys_mprotect+0x78/0xc0 [ 38.881614] do_syscall_64+0x3f/0x90 [ 38.882091] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.882736] [ 38.882963] Freed by task 213: [ 38.883358] kasan_save_stack+0x22/0x50 [ 38.883858] kasan_set_track+0x25/0x30 [ 38.884353] kasan_save_free_info+0x2b/0x50 [ 38.884887] __kasan_slab_free+0x10a/0x190 [ 38.885442] kmem_cache_free+0x10d/0x4d0 [ 38.885960] rcu_core+0x8c8/0x2860 [ 38.886404] __do_softirq+0x1b7/0x7d4 [ 38.886881] [ 38.887102] Last potentially related work creation: [ 38.887692] kasan_save_stack+0x22/0x50 [ 38.888207] __kasan_record_aux_stack+0x8e/0xa0 [ 38.888788] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.889440] remove_vma+0x139/0x170 [ 38.889890] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.890452] do_vmi_munmap+0x1f1/0x2b0 [ 38.890939] __vm_munmap+0x138/0x3a0 [ 38.891404] __x64_sys_munmap+0x59/0x80 [ 38.891917] do_syscall_64+0x3f/0x90 [ 38.892389] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.893052] [ 38.893269] The buggy address belongs to the object at ffff88801809d2b8 [ 38.893269] which belongs to the cache vm_area_struct of size 168 [ 38.894750] The buggy address is located 88 bytes inside of [ 38.894750] freed 168-byte region [ffff88801809d2b8, ffff88801809d360) [ 38.896163] [ 38.896377] The buggy address belongs to the physical page: [ 38.897056] page:000000007ab51e11 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1809d [ 38.898161] memcg:ffff88800f15a401 [ 38.898589] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.899295] page_type: 0xffffffff() [ 38.899747] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a3180 0000000000000003 [ 38.900672] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f15a401 [ 38.901592] page dumped because: kasan: bad access detected [ 38.902252] [ 38.902468] Memory state around the buggy address: [ 38.903053] ffff88801809d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.903909] ffff88801809d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.904771] >ffff88801809d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.905641] ^ [ 38.906123] ffff88801809d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.906997] ffff88801809d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.907843] ================================================================== [ 38.908812] Disabling lock debugging due to kernel taint [ 40.843639] BUG: Bad rss-counter state mm:00000000f994f052 type:MM_FILEPAGES val:33 [ 40.844567] BUG: Bad rss-counter state mm:00000000f994f052 type:MM_ANONPAGES val:22 [ 41.332564] BUG: Bad rss-counter state mm:00000000dd5f340e type:MM_FILEPAGES val:33 [ 41.334017] BUG: Bad rss-counter state mm:00000000dd5f340e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2454' (ECDSA) to the list of known hosts. 2023/06/21 04:59:38 fuzzer started 2023/06/21 04:59:38 dialing manager at localhost:36067 2023/06/21 04:59:38 checking machine... 2023/06/21 04:59:38 checking revisions... [ 42.100921] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:59:38 testing simple program... [ 42.149086] cgroup: Unknown subsys name 'net' [ 42.189487] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:59:37 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016e27470 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=1ffff11002dc4f1d RIP=ffffffff814c0250 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 00007fb7259e7700 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=00007f27b5099a10 CR3=00000000167d0000 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=656e6e6f637369642064657669656365 XMM02=63736964203a31313a38303934332074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383039 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b3055 RBX=0000000000000001 RCX=ffffffff863b3050 RDX=0000000000000000 RSI=0000000000000000 RDI=1ffffffff0c7660a RBP=ffff88806cf09ac8 RSP=ffff88806cf09a00 R8 =ffffffff863b3054 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=000000000008a88c R12=ffff88806cf09ad0 R13=ffff88806cf09ab8 R14=ffff88800ee6fd08 R15=ffff88806cf09a70 RIP=ffffffff81131127 RFL=00000217 [----APC] 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 00007f9e9cf22900 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=00007ffc8ff22000 CR3=000000000c5e4000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000