syzkaller login: [ 43.450692] BUG: Bad rss-counter state mm:0000000081796f00 type:MM_FILEPAGES val:33 [ 43.452073] BUG: Bad rss-counter state mm:0000000081796f00 type:MM_ANONPAGES val:22 [ 43.500462] ================================================================== [ 43.501492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.502629] Read of size 8 at addr ffff88801a3044e0 by task sshd/220 [ 43.503546] [ 43.503769] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.504640] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.505610] Call Trace: [ 43.505931] [ 43.506218] dump_stack_lvl+0x91/0xf0 [ 43.506716] print_report+0xcc/0x620 [ 43.507236] ? __virt_addr_valid+0x102/0x340 [ 43.507797] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.508424] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.509051] kasan_report+0xbe/0xf0 [ 43.509534] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.510160] vma_interval_tree_remove+0xc75/0xec0 [ 43.510773] vma_prepare+0xc54/0x11a0 [ 43.511264] __split_vma+0x5af/0x950 [ 43.511734] ? __pfx___split_vma+0x10/0x10 [ 43.512261] ? find_held_lock+0x2c/0x110 [ 43.512779] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.513345] ? lock_is_held_type+0x9f/0x120 [ 43.513880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.514489] ? mtree_range_walk+0x632/0x900 [ 43.515043] ? mas_walk+0x5c7/0x7c0 [ 43.515530] do_vmi_munmap+0x1f1/0x2b0 [ 43.516027] mmap_region+0x1f9/0x2660 [ 43.516512] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.517026] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.517742] ? __pfx_lock_acquire+0x10/0x10 [ 43.518280] ? __pfx_mmap_region+0x10/0x10 [ 43.518808] ? security_mmap_addr+0x7d/0xa0 [ 43.519357] ? get_unmapped_area+0x1f5/0x3f0 [ 43.519909] do_mmap+0x854/0xf00 [ 43.520349] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.520850] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.521419] ksys_mmap_pgoff+0x3af/0x500 [ 43.521938] do_syscall_64+0x3f/0x90 [ 43.522417] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.523066] RIP: 0033:0x7f667c8bcd82 [ 43.523536] 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 [ 43.525666] RSP: 002b:00007ffea98afd28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.526576] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f667c8bcd82 [ 43.527452] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f667bcf6000 [ 43.528313] RBP: 00007f667bcf6000 R08: 0000000000000009 R09: 0000000000001000 [ 43.529176] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606cc811ec0 [ 43.530042] R13: 00007ffea98afd40 R14: 00007ffea98afd70 R15: 00007ffea98b00d0 [ 43.530906] [ 43.531210] [ 43.531425] Allocated by task 213: [ 43.531860] kasan_save_stack+0x22/0x50 [ 43.532378] kasan_set_track+0x25/0x30 [ 43.532871] __kasan_slab_alloc+0x59/0x70 [ 43.533479] kmem_cache_alloc+0x16b/0x370 [ 43.533998] vm_area_dup+0x20/0x160 [ 43.534453] __split_vma+0x170/0x950 [ 43.534922] split_vma+0xc6/0x110 [ 43.535388] mprotect_fixup+0x8d2/0xb30 [ 43.535896] do_mprotect_pkey+0x87e/0xd40 [ 43.536422] __x64_sys_mprotect+0x78/0xc0 [ 43.536945] do_syscall_64+0x3f/0x90 [ 43.537423] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.538071] [ 43.538292] Freed by task 213: [ 43.538682] kasan_save_stack+0x22/0x50 [ 43.539198] kasan_set_track+0x25/0x30 [ 43.539695] kasan_save_free_info+0x2b/0x50 [ 43.540228] __kasan_slab_free+0x10a/0x190 [ 43.540762] kmem_cache_free+0x10d/0x4d0 [ 43.541268] rcu_core+0x8c8/0x2860 [ 43.541717] __do_softirq+0x1b7/0x7d4 [ 43.542195] [ 43.542409] Last potentially related work creation: [ 43.542992] kasan_save_stack+0x22/0x50 [ 43.543518] __kasan_record_aux_stack+0x8e/0xa0 [ 43.544093] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.544741] remove_vma+0x139/0x170 [ 43.545191] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.545755] do_vmi_munmap+0x1f1/0x2b0 [ 43.546242] __vm_munmap+0x138/0x3a0 [ 43.546711] __x64_sys_munmap+0x59/0x80 [ 43.547230] do_syscall_64+0x3f/0x90 [ 43.547704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.548343] [ 43.548561] The buggy address belongs to the object at ffff88801a304488 [ 43.548561] which belongs to the cache vm_area_struct of size 168 [ 43.550031] The buggy address is located 88 bytes inside of [ 43.550031] freed 168-byte region [ffff88801a304488, ffff88801a304530) [ 43.551439] [ 43.551658] The buggy address belongs to the physical page: [ 43.552321] page:000000006b518cbe refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a304 [ 43.553420] memcg:ffff88800fbf1401 [ 43.553846] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.554493] page_type: 0xffffffff() [ 43.554945] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.555923] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fbf1401 [ 43.556957] page dumped because: kasan: bad access detected [ 43.557716] [ 43.557967] Memory state around the buggy address: [ 43.558630] ffff88801a304380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 43.559625] ffff88801a304400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 43.560606] >ffff88801a304480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.561581] ^ [ 43.562443] ffff88801a304500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 43.563433] ffff88801a304580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 43.564409] ================================================================== [ 43.565509] Disabling lock debugging due to kernel taint [ 45.384660] BUG: Bad rss-counter state mm:00000000aa03eebf type:MM_FILEPAGES val:33 [ 45.385866] BUG: Bad rss-counter state mm:00000000aa03eebf type:MM_ANONPAGES val:22 [ 45.831341] BUG: Bad rss-counter state mm:000000000d1f6dd4 type:MM_FILEPAGES val:33 [ 45.832526] BUG: Bad rss-counter state mm:000000000d1f6dd4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11269' (ECDSA) to the list of known hosts. 2023/06/20 06:41:22 fuzzer started 2023/06/20 06:41:23 dialing manager at localhost:44161 2023/06/20 06:41:23 checking machine... 2023/06/20 06:41:23 checking revisions... [ 46.520260] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:41:23 testing simple program... [ 46.570548] cgroup: Unknown subsys name 'net' [ 46.606845] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:41:09 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801ca37d80 RCX=0000000000000000 RDX=ffff888015959b40 RSI=ffffffff83874eac RDI=0000000000000006 RBP=0000000000000090 RSP=ffff88801ca37be0 R8 =0000000000000006 R9 =0000000000000090 R10=0000000000000090 R11=6873733d6c616e69 R12=0000000000000090 R13=ffff88801ca37d90 R14=0000000000000000 R15=ffff88800bbfbb40 RIP=ffffffff814c081b 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 00007f47735db900 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=00007ffd58b89000 CR3=000000000f524000 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=6720646572637465733a4d41503d706f 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=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=00007fecd0a1bb80 CR3=0000000019316000 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=2032323a31343a3630203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032323a31343a3630203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000