syzkaller login: [ 31.359429] BUG: Bad rss-counter state mm:000000005370bc7a type:MM_FILEPAGES val:33 [ 31.360959] BUG: Bad rss-counter state mm:000000005370bc7a type:MM_ANONPAGES val:22 [ 31.525882] ================================================================== [ 31.526816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.527756] Read of size 8 at addr ffff888008edcdf0 by task sshd/219 [ 31.528527] [ 31.528744] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.529731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.530716] Call Trace: [ 31.531037] [ 31.531334] dump_stack_lvl+0x91/0xf0 [ 31.531837] print_report+0xcc/0x620 [ 31.532328] ? __virt_addr_valid+0x102/0x340 [ 31.532882] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.533495] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.534111] kasan_report+0xbe/0xf0 [ 31.534630] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.535276] vma_interval_tree_remove+0xc75/0xec0 [ 31.535908] vma_prepare+0xc54/0x11a0 [ 31.536409] __split_vma+0x5af/0x950 [ 31.536896] ? __pfx___split_vma+0x10/0x10 [ 31.537449] ? find_held_lock+0x2c/0x110 [ 31.537996] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.538593] ? lock_is_held_type+0x9f/0x120 [ 31.539154] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.539793] ? mtree_range_walk+0x632/0x900 [ 31.540378] ? mas_walk+0x5c7/0x7c0 [ 31.540868] do_vmi_munmap+0x1f1/0x2b0 [ 31.541374] mmap_region+0x1f9/0x2660 [ 31.541867] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.542401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.543150] ? __pfx_lock_acquire+0x10/0x10 [ 31.543703] ? __pfx_mmap_region+0x10/0x10 [ 31.544248] ? security_mmap_addr+0x7d/0xa0 [ 31.544800] ? get_unmapped_area+0x1f5/0x3f0 [ 31.545367] do_mmap+0x854/0xf00 [ 31.545817] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.546350] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.546924] ksys_mmap_pgoff+0x3af/0x500 [ 31.547459] do_syscall_64+0x3f/0x90 [ 31.547964] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.548642] RIP: 0033:0x7f8dea0fed82 [ 31.549125] 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 [ 31.551340] RSP: 002b:00007ffccbd11a58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.552287] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8dea0fed82 [ 31.553167] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8de9538000 [ 31.554046] RBP: 00007f8de9538000 R08: 0000000000000009 R09: 0000000000001000 [ 31.554935] R10: 0000000000000812 R11: 0000000000000206 R12: 00005592cb4b6ec0 [ 31.555815] R13: 00007ffccbd11a70 R14: 00007ffccbd11aa0 R15: 00007ffccbd11e00 [ 31.556704] [ 31.557006] [ 31.557232] Allocated by task 212: [ 31.557679] kasan_save_stack+0x22/0x50 [ 31.558210] kasan_set_track+0x25/0x30 [ 31.558719] __kasan_slab_alloc+0x59/0x70 [ 31.559264] kmem_cache_alloc+0x16b/0x370 [ 31.559801] vm_area_dup+0x20/0x160 [ 31.560277] __split_vma+0x170/0x950 [ 31.560757] split_vma+0xc6/0x110 [ 31.561206] mprotect_fixup+0x8d2/0xb30 [ 31.561727] do_mprotect_pkey+0x87e/0xd40 [ 31.562275] __x64_sys_mprotect+0x78/0xc0 [ 31.562813] do_syscall_64+0x3f/0x90 [ 31.563308] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.563971] [ 31.564196] Freed by task 212: [ 31.564605] kasan_save_stack+0x22/0x50 [ 31.565129] kasan_set_track+0x25/0x30 [ 31.565639] kasan_save_free_info+0x2b/0x50 [ 31.566203] __kasan_slab_free+0x10a/0x190 [ 31.566750] kmem_cache_free+0x10d/0x4d0 [ 31.567272] rcu_core+0x8c8/0x2860 [ 31.567732] __do_softirq+0x1b7/0x7d4 [ 31.568230] [ 31.568456] Last potentially related work creation: [ 31.569059] kasan_save_stack+0x22/0x50 [ 31.569580] __kasan_record_aux_stack+0x8e/0xa0 [ 31.570173] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.570839] remove_vma+0x139/0x170 [ 31.571301] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.571879] do_vmi_munmap+0x1f1/0x2b0 [ 31.572382] __vm_munmap+0x138/0x3a0 [ 31.572872] __x64_sys_munmap+0x59/0x80 [ 31.573386] do_syscall_64+0x3f/0x90 [ 31.573878] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.574566] [ 31.574785] The buggy address belongs to the object at ffff888008edcd98 [ 31.574785] which belongs to the cache vm_area_struct of size 168 [ 31.576308] The buggy address is located 88 bytes inside of [ 31.576308] freed 168-byte region [ffff888008edcd98, ffff888008edce40) [ 31.577760] [ 31.577984] The buggy address belongs to the physical page: [ 31.578675] page:00000000e0fa5d18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8edc [ 31.579792] memcg:ffff88800f144801 [ 31.580231] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.580966] page_type: 0xffffffff() [ 31.581435] raw: 0100000000000200 ffff8880087a0c80 ffffea00003561c0 dead000000000003 [ 31.582396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f144801 [ 31.583340] page dumped because: kasan: bad access detected [ 31.584024] [ 31.584247] Memory state around the buggy address: [ 31.584847] ffff888008edcc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.585739] ffff888008edcd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.586635] >ffff888008edcd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.587509] ^ [ 31.588349] ffff888008edce00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.589233] ffff888008edce80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.590114] ================================================================== [ 31.591519] Disabling lock debugging due to kernel taint [ 33.457491] BUG: Bad rss-counter state mm:00000000dd43268c type:MM_FILEPAGES val:33 [ 33.458722] BUG: Bad rss-counter state mm:00000000dd43268c type:MM_ANONPAGES val:22 [ 33.847047] BUG: Bad rss-counter state mm:000000009d0c09c5 type:MM_FILEPAGES val:33 [ 33.848015] BUG: Bad rss-counter state mm:000000009d0c09c5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38759' (ECDSA) to the list of known hosts. 2023/06/20 10:54:58 fuzzer started 2023/06/20 10:54:58 dialing manager at localhost:36067 2023/06/20 10:54:58 checking machine... 2023/06/20 10:54:58 checking revisions... [ 34.624861] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:54:58 testing simple program... [ 34.681043] cgroup: Unknown subsys name 'net' [ 34.721077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:54:58 Registers: info registers vcpu 0 RAX=0000000000020f03 RBX=0000000000000002 RCX=ffffffff8180f5ba RDX=0000000000020f11 RSI=00000000000080f5 RDI=ffffffff86509dc8 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f03 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130837 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 00007f40a1a4b900 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=00007f40a1a2a020 CR3=000000001c204000 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=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 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=00000000000101f5 RSI=ffffffff82191d98 RDI=0000000000000007 RBP=ffff88800f4481a0 RSP=ffff88800a1d77a0 R8 =0000000000000007 R9 =0000000000010000 R10=00000000000101f5 R11=0000000000000128 R12=00000000000101f5 R13=ffff88800f448050 R14=ffff88800f448048 R15=ffff88800f448060 RIP=ffffffff82191d9e RFL=00000093 [--S-A-C] 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 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=00007fc6a36ea310 CR3=0000000014528000 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=2037353a34353a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34353a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000