syzkaller login: [ 135.115501] BUG: Bad rss-counter state mm:000000001e55bb8c type:MM_FILEPAGES val:33 [ 135.116198] BUG: Bad rss-counter state mm:000000001e55bb8c type:MM_ANONPAGES val:22 [ 135.311240] ================================================================== [ 135.311857] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 135.312468] Read of size 8 at addr ffff888009907058 by task sshd/220 [ 135.313018] [ 135.313169] CPU: 1 PID: 220 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 135.313837] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 135.314467] Call Trace: [ 135.314683] [ 135.314872] dump_stack_lvl+0x91/0xf0 [ 135.315199] print_report+0xcc/0x620 [ 135.315531] ? __virt_addr_valid+0x102/0x340 [ 135.315896] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.316310] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.316714] kasan_report+0xbe/0xf0 [ 135.317069] ? vma_interval_tree_remove+0xc75/0xec0 [ 135.317487] vma_interval_tree_remove+0xc75/0xec0 [ 135.317887] vma_prepare+0xc54/0x11a0 [ 135.318207] __split_vma+0x5af/0x950 [ 135.318529] ? __pfx___split_vma+0x10/0x10 [ 135.318880] ? find_held_lock+0x2c/0x110 [ 135.319233] do_vmi_align_munmap+0x2ba/0x11f0 [ 135.319607] ? lock_is_held_type+0x9f/0x120 [ 135.319959] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 135.320357] ? mtree_range_walk+0x632/0x900 [ 135.320730] ? mas_walk+0x5c7/0x7c0 [ 135.321092] do_vmi_munmap+0x1f1/0x2b0 [ 135.321420] mmap_region+0x1f9/0x2660 [ 135.321737] ? vm_mmap_pgoff+0x15c/0x3a0 [ 135.322079] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 135.322548] ? __pfx_lock_acquire+0x10/0x10 [ 135.322908] ? __pfx_mmap_region+0x10/0x10 [ 135.323261] ? security_mmap_addr+0x7d/0xa0 [ 135.323613] ? get_unmapped_area+0x1f5/0x3f0 [ 135.323976] do_mmap+0x854/0xf00 [ 135.324269] vm_mmap_pgoff+0x1a6/0x3a0 [ 135.324598] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 135.324997] ksys_mmap_pgoff+0x3af/0x500 [ 135.325336] do_syscall_64+0x3f/0x90 [ 135.325656] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.326081] RIP: 0033:0x7f79eeaa4d82 [ 135.326384] 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 [ 135.327751] RSP: 002b:00007ffdef348888 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 135.328340] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f79eeaa4d82 [ 135.328915] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f79edede000 [ 135.329464] RBP: 00007f79edede000 R08: 0000000000000009 R09: 0000000000001000 [ 135.330011] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563187c8fb20 [ 135.330571] R13: 00007ffdef3488a0 R14: 00007ffdef3488d0 R15: 00007ffdef348c30 [ 135.331123] [ 135.331318] [ 135.331462] Allocated by task 211: [ 135.331744] kasan_save_stack+0x22/0x50 [ 135.332078] kasan_set_track+0x25/0x30 [ 135.332406] __kasan_slab_alloc+0x59/0x70 [ 135.332754] kmem_cache_alloc+0x16b/0x370 [ 135.333190] vm_area_dup+0x20/0x160 [ 135.333518] __split_vma+0x170/0x950 [ 135.333833] split_vma+0xc6/0x110 [ 135.334124] mprotect_fixup+0x8d2/0xb30 [ 135.334464] do_mprotect_pkey+0x87e/0xd40 [ 135.334810] __x64_sys_mprotect+0x78/0xc0 [ 135.335156] do_syscall_64+0x3f/0x90 [ 135.335479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.335903] [ 135.336047] Freed by task 209: [ 135.336309] kasan_save_stack+0x22/0x50 [ 135.336647] kasan_set_track+0x25/0x30 [ 135.336983] kasan_save_free_info+0x2b/0x50 [ 135.337345] __kasan_slab_free+0x10a/0x190 [ 135.337704] kmem_cache_free+0x10d/0x4d0 [ 135.338041] rcu_core+0x8c8/0x2860 [ 135.338345] __do_softirq+0x1b7/0x7d4 [ 135.338661] [ 135.338807] Last potentially related work creation: [ 135.339187] kasan_save_stack+0x22/0x50 [ 135.339531] __kasan_record_aux_stack+0x8e/0xa0 [ 135.339908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 135.340336] remove_vma+0x139/0x170 [ 135.340640] do_vmi_align_munmap+0xd4a/0x11f0 [ 135.341020] do_vmi_munmap+0x1f1/0x2b0 [ 135.341354] __vm_munmap+0x138/0x3a0 [ 135.341663] __x64_sys_munmap+0x59/0x80 [ 135.341984] do_syscall_64+0x3f/0x90 [ 135.342301] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.342728] [ 135.342874] Second to last potentially related work creation: [ 135.343326] kasan_save_stack+0x22/0x50 [ 135.343660] __kasan_record_aux_stack+0x8e/0xa0 [ 135.344037] __call_rcu_common.constprop.0+0x6a/0xb90 [ 135.344471] remove_vma+0x139/0x170 [ 135.344772] do_vmi_align_munmap+0xd4a/0x11f0 [ 135.345172] do_vmi_munmap+0x1f1/0x2b0 [ 135.345515] mmap_region+0x1f9/0x2660 [ 135.345832] do_mmap+0x854/0xf00 [ 135.346119] vm_mmap_pgoff+0x1a6/0x3a0 [ 135.346449] ksys_mmap_pgoff+0x3af/0x500 [ 135.346782] do_syscall_64+0x3f/0x90 [ 135.347097] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 135.347535] [ 135.347680] The buggy address belongs to the object at ffff888009907000 [ 135.347680] which belongs to the cache vm_area_struct of size 168 [ 135.348639] The buggy address is located 88 bytes inside of [ 135.348639] freed 168-byte region [ffff888009907000, ffff8880099070a8) [ 135.352982] [ 135.353133] The buggy address belongs to the physical page: [ 135.353589] page:00000000ec87cba8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9907 [ 135.354321] memcg:ffff88800e7b0f01 [ 135.354747] flags: 0x100000000000200(slab|node=0|zone=1) [ 135.355177] page_type: 0xffffffff() [ 135.355495] raw: 0100000000000200 ffff88800879fc80 ffffea00001a5280 dead000000000006 [ 135.356099] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7b0f01 [ 135.356708] page dumped because: kasan: bad access detected [ 135.357164] [ 135.357325] Memory state around the buggy address: [ 135.357715] ffff888009906f00: fc fb fb fb fb fb fb fb fb fb fc fc fc fc 00 00 [ 135.358272] ffff888009906f80: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc [ 135.358828] >ffff888009907000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 135.359397] ^ [ 135.359884] ffff888009907080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 135.360460] ffff888009907100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 135.361131] ================================================================== [ 135.368683] Disabling lock debugging due to kernel taint [ 142.112049] BUG: Bad rss-counter state mm:000000001c31b1df type:MM_FILEPAGES val:33 [ 142.112694] BUG: Bad rss-counter state mm:000000001c31b1df type:MM_ANONPAGES val:22 [ 143.117298] BUG: Bad rss-counter state mm:000000003c877b14 type:MM_FILEPAGES val:33 [ 143.118010] BUG: Bad rss-counter state mm:000000003c877b14 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59969' (ECDSA) to the list of known hosts. 2023/06/20 08:11:14 fuzzer started 2023/06/20 08:11:14 dialing manager at localhost:44161 2023/06/20 08:11:14 checking machine... 2023/06/20 08:11:14 checking revisions... [ 143.914807] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:11:14 testing simple program... [ 143.991692] cgroup: Unknown subsys name 'net' [ 144.073399] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:09:35 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff888014667598 RSI=ffff888014667b30 RDI=ffff888014667598 RBP=ffff888014667630 RSP=ffff888014667588 R8 =0000000000000001 R9 =ffff8880146675d8 R10=0000000000038001 R11=00000000000070be R12=ffff888014667660 R13=0000000000000000 R14=ffff888016d3d1c0 R15=0000000000000cc0 RIP=ffffffff81130352 RFL=00000202 [-------] 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 00007f8e85548900 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=00007f786a8a0be0 CR3=000000000d6f2000 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=2034313a31313a3830203032206e754a XMM01=5d3031303831312e33343120205b203a XMM02=415f4d4d3a6570797420343162373738 XMM03=617473207265746e756f632d73737220 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a31313a3830203032 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=00007f8e85978790 CR3=000000000ea18000 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=0000000000000018fffffffe7ffbfeff XMM01=e70e638373f7bc1a000055c000000030 XMM02=e70e638373f7bc1a096bc3f943ef3a76 XMM03=00000000000000020a6bc3f943ef3a76 XMM04=00000000000000008000000000000006 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=35713fe300c8ae9a0000000000000000 XMM08=2520737365726464616e657473696c00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000