syzkaller login: [ 68.961132] BUG: Bad rss-counter state mm:00000000ada3c898 type:MM_FILEPAGES val:33 [ 68.962339] BUG: Bad rss-counter state mm:00000000ada3c898 type:MM_ANONPAGES val:22 [ 69.000009] ================================================================== [ 69.001102] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.002179] Read of size 8 at addr ffff88800d67da50 by task sshd/219 [ 69.003025] [ 69.003252] CPU: 1 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 69.004310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.005307] Call Trace: [ 69.005628] [ 69.005933] dump_stack_lvl+0x91/0xf0 [ 69.006437] print_report+0xcc/0x620 [ 69.006939] ? __virt_addr_valid+0x102/0x340 [ 69.007503] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.008156] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.008796] kasan_report+0xbe/0xf0 [ 69.009278] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.009918] vma_interval_tree_remove+0xc75/0xec0 [ 69.010525] vma_prepare+0xc54/0x11a0 [ 69.011023] __split_vma+0x5af/0x950 [ 69.011496] ? __pfx___split_vma+0x10/0x10 [ 69.012046] ? find_held_lock+0x2c/0x110 [ 69.012603] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.013188] ? lock_is_held_type+0x9f/0x120 [ 69.013753] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.014371] ? mtree_range_walk+0x632/0x900 [ 69.014938] ? mas_walk+0x5c7/0x7c0 [ 69.015417] do_vmi_munmap+0x1f1/0x2b0 [ 69.015929] mmap_region+0x1f9/0x2660 [ 69.016435] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.016965] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.017685] ? __pfx_lock_acquire+0x10/0x10 [ 69.018235] ? __pfx_mmap_region+0x10/0x10 [ 69.018795] ? security_mmap_addr+0x7d/0xa0 [ 69.019337] ? get_unmapped_area+0x1f5/0x3f0 [ 69.019905] do_mmap+0x854/0xf00 [ 69.020360] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.020873] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.021442] ksys_mmap_pgoff+0x3af/0x500 [ 69.021989] do_syscall_64+0x3f/0x90 [ 69.022470] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.023145] RIP: 0033:0x7fd10f5f0d82 [ 69.023609] 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 [ 69.025808] RSP: 002b:00007ffca2f52248 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.027013] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd10f5f0d82 [ 69.027895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd10ea2a000 [ 69.028851] RBP: 00007fd10ea2a000 R08: 0000000000000009 R09: 0000000000001000 [ 69.029751] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c71a0ffec0 [ 69.030623] R13: 00007ffca2f52260 R14: 00007ffca2f52290 R15: 00007ffca2f525f0 [ 69.031677] [ 69.031983] [ 69.032220] Allocated by task 212: [ 69.032658] kasan_save_stack+0x22/0x50 [ 69.033199] kasan_set_track+0x25/0x30 [ 69.033739] __kasan_slab_alloc+0x59/0x70 [ 69.034296] kmem_cache_alloc+0x16b/0x370 [ 69.034851] vm_area_dup+0x20/0x160 [ 69.035333] __split_vma+0x170/0x950 [ 69.035835] split_vma+0xc6/0x110 [ 69.036306] mprotect_fixup+0x8d2/0xb30 [ 69.036850] do_mprotect_pkey+0x87e/0xd40 [ 69.037403] __x64_sys_mprotect+0x78/0xc0 [ 69.037990] do_syscall_64+0x3f/0x90 [ 69.038487] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.039173] [ 69.039394] Freed by task 212: [ 69.039823] kasan_save_stack+0x22/0x50 [ 69.040364] kasan_set_track+0x25/0x30 [ 69.040894] kasan_save_free_info+0x2b/0x50 [ 69.041449] __kasan_slab_free+0x10a/0x190 [ 69.042034] kmem_cache_free+0x10d/0x4d0 [ 69.042564] rcu_core+0x8c8/0x2860 [ 69.043044] __do_softirq+0x1b7/0x7d4 [ 69.043544] [ 69.043784] Last potentially related work creation: [ 69.044418] kasan_save_stack+0x22/0x50 [ 69.044957] __kasan_record_aux_stack+0x8e/0xa0 [ 69.045557] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.046250] remove_vma+0x139/0x170 [ 69.046740] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.047318] do_vmi_munmap+0x1f1/0x2b0 [ 69.047832] __vm_munmap+0x138/0x3a0 [ 69.048348] __x64_sys_munmap+0x59/0x80 [ 69.048884] do_syscall_64+0x3f/0x90 [ 69.049378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.050078] [ 69.050302] Second to last potentially related work creation: [ 69.051036] kasan_save_stack+0x22/0x50 [ 69.051560] __kasan_record_aux_stack+0x8e/0xa0 [ 69.052180] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.052866] remove_vma+0x139/0x170 [ 69.053337] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.053948] do_vmi_munmap+0x1f1/0x2b0 [ 69.054459] mmap_region+0x1f9/0x2660 [ 69.054964] do_mmap+0x854/0xf00 [ 69.055416] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.055944] ksys_mmap_pgoff+0x3af/0x500 [ 69.056499] do_syscall_64+0x3f/0x90 [ 69.057003] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.057679] [ 69.057924] The buggy address belongs to the object at ffff88800d67d9f8 [ 69.057924] which belongs to the cache vm_area_struct of size 168 [ 69.059481] The buggy address is located 88 bytes inside of [ 69.059481] freed 168-byte region [ffff88800d67d9f8, ffff88800d67daa0) [ 69.061005] [ 69.061231] The buggy address belongs to the physical page: [ 69.061952] page:00000000b1b85424 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd67d [ 69.063102] memcg:ffff88800bf6e801 [ 69.063551] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.064291] page_type: 0xffffffff() [ 69.064773] raw: 0100000000000200 ffff88800879fc80 ffffea000039f2c0 dead000000000004 [ 69.065727] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800bf6e801 [ 69.066680] page dumped because: kasan: bad access detected [ 69.067373] [ 69.067594] Memory state around the buggy address: [ 69.068219] ffff88800d67d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.069110] ffff88800d67d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 69.070001] >ffff88800d67da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.070890] ^ [ 69.071618] ffff88800d67da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 69.072519] ffff88800d67db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.073404] ================================================================== [ 69.074629] Disabling lock debugging due to kernel taint [ 71.215182] BUG: Bad rss-counter state mm:0000000095aaf3ac type:MM_FILEPAGES val:33 [ 71.216154] BUG: Bad rss-counter state mm:0000000095aaf3ac type:MM_ANONPAGES val:22 [ 71.605539] BUG: Bad rss-counter state mm:00000000af690074 type:MM_FILEPAGES val:33 [ 71.606569] BUG: Bad rss-counter state mm:00000000af690074 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59140' (ECDSA) to the list of known hosts. 2023/06/20 04:03:29 fuzzer started 2023/06/20 04:03:30 dialing manager at localhost:44161 2023/06/20 04:03:30 checking machine... 2023/06/20 04:03:30 checking revisions... [ 72.361463] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:03:30 testing simple program... [ 72.401188] cgroup: Unknown subsys name 'net' [ 72.450018] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff812d869a RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=1ffff11002ccbf05 RSP=ffff88801665f818 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000d000c R12=ffff88806ce3de20 R13=ffffffff81806192 R14=0000000000000000 R15=0000000000000007 RIP=ffffffff812d86a2 RFL=00000047 [---Z-PC] 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 00007f98764cc700 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=00007f86452e80b0 CR3=000000000f2d4000 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=2039323a33303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039323a33303a3430203032 XMM08=3d656e696c646d632022656369767265 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=ffff888008c58400 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=00007f74bbd650a0 CR3=000000000d604000 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=9bbb914f157a50a9834fa91b1cbaddea XMM02=ec2efd57dc4c00df0000000000121b60 XMM03=d7cde509c16fcae00000000000121c30 XMM04=208f1228a6f1b96200000000000ae988 XMM05=dfcdbad4f1609c370000000000139c08 XMM06=0665ea8f68aa543b0000000000138de0 XMM07=e042d86d42eb936e0000000000128c78 XMM08=d7cde509c16fcae00000000000121c30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000