syzkaller login: [ 31.159682] BUG: Bad rss-counter state mm:00000000809b824b type:MM_FILEPAGES val:33 [ 31.161501] BUG: Bad rss-counter state mm:00000000809b824b type:MM_ANONPAGES val:22 [ 31.329080] ================================================================== [ 31.330194] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.331369] Read of size 8 at addr ffff888015f753f8 by task sshd/220 [ 31.332496] [ 31.332768] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.333836] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.335023] Call Trace: [ 31.335384] [ 31.335696] dump_stack_lvl+0x91/0xf0 [ 31.336235] print_report+0xcc/0x620 [ 31.336766] ? __virt_addr_valid+0x102/0x340 [ 31.337368] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338047] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.338728] kasan_report+0xbe/0xf0 [ 31.339260] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.339949] vma_interval_tree_remove+0xc75/0xec0 [ 31.340619] vma_prepare+0xc54/0x11a0 [ 31.341141] __split_vma+0x5af/0x950 [ 31.341668] ? __pfx___split_vma+0x10/0x10 [ 31.342249] ? find_held_lock+0x2c/0x110 [ 31.342824] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.343470] ? lock_is_held_type+0x9f/0x120 [ 31.344073] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.344752] ? mtree_range_walk+0x632/0x900 [ 31.345366] ? mas_walk+0x5c7/0x7c0 [ 31.345894] do_vmi_munmap+0x1f1/0x2b0 [ 31.346441] mmap_region+0x1f9/0x2660 [ 31.346978] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.347555] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.348344] ? __pfx_lock_acquire+0x10/0x10 [ 31.348936] ? __pfx_mmap_region+0x10/0x10 [ 31.349524] ? security_mmap_addr+0x7d/0xa0 [ 31.350113] ? get_unmapped_area+0x1f5/0x3f0 [ 31.350722] do_mmap+0x854/0xf00 [ 31.351221] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.351760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.352377] ksys_mmap_pgoff+0x3af/0x500 [ 31.352939] do_syscall_64+0x3f/0x90 [ 31.353466] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.354187] RIP: 0033:0x7f26dfb87d82 [ 31.354696] 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 [ 31.357058] RSP: 002b:00007ffcdb20ef18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.358063] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f26dfb87d82 [ 31.359003] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f26defc1000 [ 31.359939] RBP: 00007f26defc1000 R08: 0000000000000009 R09: 0000000000001000 [ 31.360868] R10: 0000000000000812 R11: 0000000000000206 R12: 00005565817dbd90 [ 31.361805] R13: 00007ffcdb20ef30 R14: 00007ffcdb20ef60 R15: 00007ffcdb20f2c0 [ 31.362754] [ 31.363078] [ 31.363332] Allocated by task 213: [ 31.363810] kasan_save_stack+0x22/0x50 [ 31.364360] kasan_set_track+0x25/0x30 [ 31.364901] __kasan_slab_alloc+0x59/0x70 [ 31.365481] kmem_cache_alloc+0x16b/0x370 [ 31.366053] vm_area_dup+0x20/0x160 [ 31.366553] __split_vma+0x170/0x950 [ 31.367069] split_vma+0xc6/0x110 [ 31.367562] mprotect_fixup+0x8d2/0xb30 [ 31.368116] do_mprotect_pkey+0x87e/0xd40 [ 31.368693] __x64_sys_mprotect+0x78/0xc0 [ 31.369263] do_syscall_64+0x3f/0x90 [ 31.369789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370499] [ 31.370741] Freed by task 213: [ 31.371187] kasan_save_stack+0x22/0x50 [ 31.371750] kasan_set_track+0x25/0x30 [ 31.372288] kasan_save_free_info+0x2b/0x50 [ 31.372880] __kasan_slab_free+0x10a/0x190 [ 31.373469] kmem_cache_free+0x10d/0x4d0 [ 31.374035] rcu_core+0x8c8/0x2860 [ 31.374524] __do_softirq+0x1b7/0x7d4 [ 31.375052] [ 31.375293] Last potentially related work creation: [ 31.375942] kasan_save_stack+0x22/0x50 [ 31.376497] __kasan_record_aux_stack+0x8e/0xa0 [ 31.377136] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.377846] remove_vma+0x139/0x170 [ 31.378348] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.378964] do_vmi_munmap+0x1f1/0x2b0 [ 31.379519] __vm_munmap+0x138/0x3a0 [ 31.380035] __x64_sys_munmap+0x59/0x80 [ 31.380589] do_syscall_64+0x3f/0x90 [ 31.381116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.381850] [ 31.382090] The buggy address belongs to the object at ffff888015f753a0 [ 31.382090] which belongs to the cache vm_area_struct of size 168 [ 31.383721] The buggy address is located 88 bytes inside of [ 31.383721] freed 168-byte region [ffff888015f753a0, ffff888015f75448) [ 31.385288] [ 31.385530] The buggy address belongs to the physical page: [ 31.386258] page:00000000a55b63ed refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f75 [ 31.387487] memcg:ffff88800b2ed901 [ 31.387972] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.388690] page_type: 0xffffffff() [ 31.389184] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.390193] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800b2ed901 [ 31.391201] page dumped because: kasan: bad access detected [ 31.391937] [ 31.392177] Memory state around the buggy address: [ 31.392816] ffff888015f75280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.393766] ffff888015f75300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.394727] >ffff888015f75380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.395690] ^ [ 31.396630] ffff888015f75400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.397583] ffff888015f75480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.398528] ================================================================== [ 31.399797] Disabling lock debugging due to kernel taint [ 33.185434] BUG: Bad rss-counter state mm:00000000c089418a type:MM_FILEPAGES val:33 [ 33.186609] BUG: Bad rss-counter state mm:00000000c089418a type:MM_ANONPAGES val:22 [ 33.527862] BUG: Bad rss-counter state mm:0000000077644388 type:MM_FILEPAGES val:33 [ 33.529081] BUG: Bad rss-counter state mm:0000000077644388 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40773' (ECDSA) to the list of known hosts. 2023/06/20 22:32:58 fuzzer started 2023/06/20 22:32:58 dialing manager at localhost:36067 2023/06/20 22:32:58 checking machine... 2023/06/20 22:32:58 checking revisions... [ 34.193422] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:32:58 testing simple program... [ 34.243361] cgroup: Unknown subsys name 'net' [ 34.290762] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:32:58 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=00007ff061350e08 CR3=000000000ebd4000 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=32333a3232203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3932325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363731 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=0000000000000000 RBX=00007f45b1f75598 RCX=0000000000000000 RDX=0000000000000001 RSI=00007f45b2b22740 RDI=00007f45b1f76000 RBP=00007f45b1f76000 RSP=00007ffee603b130 R8 =00005633308e90d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=00005633309088c0 R13=00007f45b254bae8 R14=0000000000000020 R15=0000000000000000 RIP=00007f45b23c9a32 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f45b1f97900 00000000 00000000 GS =0000 0000000000000000 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=00007f45b254bae8 CR3=000000000fda4000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000