syzkaller login: [ 32.003867] BUG: Bad rss-counter state mm:00000000c9d8981d type:MM_FILEPAGES val:33 [ 32.004893] BUG: Bad rss-counter state mm:00000000c9d8981d type:MM_ANONPAGES val:22 [ 32.118282] ================================================================== [ 32.118945] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.119612] Read of size 8 at addr ffff88800fe47b38 by task sshd/219 [ 32.120145] [ 32.120319] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.120909] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.121632] Call Trace: [ 32.121851] [ 32.122045] dump_stack_lvl+0x91/0xf0 [ 32.122546] print_report+0xcc/0x620 [ 32.122876] ? __virt_addr_valid+0x102/0x340 [ 32.123259] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.123685] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.124115] kasan_report+0xbe/0xf0 [ 32.124542] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.124981] vma_interval_tree_remove+0xc75/0xec0 [ 32.125400] vma_prepare+0xc54/0x11a0 [ 32.125746] __split_vma+0x5af/0x950 [ 32.126076] ? __pfx___split_vma+0x10/0x10 [ 32.126469] ? find_held_lock+0x2c/0x110 [ 32.126839] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.127229] ? lock_is_held_type+0x9f/0x120 [ 32.127599] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.128019] ? mtree_range_walk+0x632/0x900 [ 32.128413] ? mas_walk+0x5c7/0x7c0 [ 32.128734] do_vmi_munmap+0x1f1/0x2b0 [ 32.129069] mmap_region+0x1f9/0x2660 [ 32.129401] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.129749] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.130225] ? __pfx_lock_acquire+0x10/0x10 [ 32.130581] ? __pfx_mmap_region+0x10/0x10 [ 32.130938] ? security_mmap_addr+0x7d/0xa0 [ 32.131285] ? get_unmapped_area+0x1f5/0x3f0 [ 32.131652] do_mmap+0x854/0xf00 [ 32.131941] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.132267] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.132690] ksys_mmap_pgoff+0x3af/0x500 [ 32.133026] do_syscall_64+0x3f/0x90 [ 32.133338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.133751] RIP: 0033:0x7fdfa4b93d82 [ 32.134049] 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 [ 32.135437] RSP: 002b:00007fff50445148 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.136061] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdfa4b93d82 [ 32.136731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdfa3fcd000 [ 32.137382] RBP: 00007fdfa3fcd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.138005] R10: 0000000000000812 R11: 0000000000000206 R12: 00005637f3b87ec0 [ 32.138661] R13: 00007fff50445160 R14: 00007fff50445190 R15: 00007fff504454f0 [ 32.139258] [ 32.139462] [ 32.139611] Allocated by task 212: [ 32.139906] kasan_save_stack+0x22/0x50 [ 32.140260] kasan_set_track+0x25/0x30 [ 32.140647] __kasan_slab_alloc+0x59/0x70 [ 32.140982] kmem_cache_alloc+0x16b/0x370 [ 32.141323] vm_area_dup+0x20/0x160 [ 32.141622] __split_vma+0x170/0x950 [ 32.141938] split_vma+0xc6/0x110 [ 32.142226] mprotect_fixup+0x8d2/0xb30 [ 32.142575] do_mprotect_pkey+0x87e/0xd40 [ 32.142935] __x64_sys_mprotect+0x78/0xc0 [ 32.143298] do_syscall_64+0x3f/0x90 [ 32.143641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.144084] [ 32.144234] Freed by task 212: [ 32.144533] kasan_save_stack+0x22/0x50 [ 32.144876] kasan_set_track+0x25/0x30 [ 32.145222] kasan_save_free_info+0x2b/0x50 [ 32.145598] __kasan_slab_free+0x10a/0x190 [ 32.145967] kmem_cache_free+0x10d/0x4d0 [ 32.146312] rcu_core+0x8c8/0x2860 [ 32.146622] __do_softirq+0x1b7/0x7d4 [ 32.146951] [ 32.147097] Last potentially related work creation: [ 32.147505] kasan_save_stack+0x22/0x50 [ 32.147856] __kasan_record_aux_stack+0x8e/0xa0 [ 32.148255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.148724] remove_vma+0x139/0x170 [ 32.149044] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.149437] do_vmi_munmap+0x1f1/0x2b0 [ 32.149781] __vm_munmap+0x138/0x3a0 [ 32.150107] __x64_sys_munmap+0x59/0x80 [ 32.150462] do_syscall_64+0x3f/0x90 [ 32.150793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.151244] [ 32.151396] The buggy address belongs to the object at ffff88800fe47ae0 [ 32.151396] which belongs to the cache vm_area_struct of size 168 [ 32.152454] The buggy address is located 88 bytes inside of [ 32.152454] freed 168-byte region [ffff88800fe47ae0, ffff88800fe47b88) [ 32.153432] [ 32.153592] The buggy address belongs to the physical page: [ 32.154051] page:00000000abc3ef61 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfe47 [ 32.154808] memcg:ffff88800f540001 [ 32.155083] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.155521] page_type: 0xffffffff() [ 32.155827] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.156498] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f540001 [ 32.157112] page dumped because: kasan: bad access detected [ 32.157585] [ 32.157747] Memory state around the buggy address: [ 32.158137] ffff88800fe47a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.158699] ffff88800fe47a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.159258] >ffff88800fe47b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.159819] ^ [ 32.160218] ffff88800fe47b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.160826] ffff88800fe47c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.161410] ================================================================== [ 32.162119] Disabling lock debugging due to kernel taint [ 33.588585] BUG: Bad rss-counter state mm:000000001e3552a1 type:MM_FILEPAGES val:33 [ 33.589352] BUG: Bad rss-counter state mm:000000001e3552a1 type:MM_ANONPAGES val:22 [ 33.948518] BUG: Bad rss-counter state mm:00000000ebd41611 type:MM_FILEPAGES val:33 [ 33.949235] BUG: Bad rss-counter state mm:00000000ebd41611 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1977' (ECDSA) to the list of known hosts. 2023/06/20 09:42:37 fuzzer started 2023/06/20 09:42:37 dialing manager at localhost:44161 2023/06/20 09:42:37 checking machine... 2023/06/20 09:42:37 checking revisions... [ 34.505566] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:42:37 testing simple program... [ 34.537303] cgroup: Unknown subsys name 'net' [ 34.571651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:42:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b9d56 RDX=1ffff11002dace9e RSI=0000000000000000 RDI=ffff888016d674f0 RBP=00005599af4dd1c0 RSP=ffff888016d67430 R8 =ffffffff864b9d5a R9 =ffff888016d674e0 R10=0000000000038001 R11=00000000000b6996 R12=ffff888016d67f58 R13=ffff888016d674e8 R14=ffff888016d67f58 R15=ffff888016d674a0 RIP=ffffffff8113125c 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 00007f38fb513700 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=00007f98f9ef77e0 CR3=000000000da2a000 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=756e696c65735f687373203a726f7272 XMM02=2079746972756365732078756e694c45 XMM03=2064656c696146203a656d616e796278 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343039 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=ffff888018ecf118 RCX=ffffffff86128101 RDX=1ffff110031d9e24 RSI=ffffffff84506c7f RDI=ffff888018ecf120 RBP=000000000000000d RSP=ffff888018ecf030 R8 =ffffffff86128140 R9 =ffff888018ecf090 R10=0000000000038001 R11=000000000001e4e6 R12=ffff888018ecf118 R13=0000000000000000 R14=ffff888016a1b680 R15=0000000000000000 RIP=ffffffff813ad46e RFL=00000216 [----AP-] 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 00007fae6c922900 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=00007fae6c8e7008 CR3=000000000eae0000 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