syzkaller login: [ 33.195341] BUG: Bad rss-counter state mm:000000004672a3ba type:MM_FILEPAGES val:33 [ 33.196370] BUG: Bad rss-counter state mm:000000004672a3ba type:MM_ANONPAGES val:22 [ 33.363296] ================================================================== [ 33.364244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.365203] Read of size 8 at addr ffff8880095055c8 by task sshd/220 [ 33.365991] [ 33.366212] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.367231] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.368207] Call Trace: [ 33.368532] [ 33.368854] dump_stack_lvl+0x91/0xf0 [ 33.369354] print_report+0xcc/0x620 [ 33.369844] ? __virt_addr_valid+0x102/0x340 [ 33.370397] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.371035] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.371650] kasan_report+0xbe/0xf0 [ 33.372131] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.372760] vma_interval_tree_remove+0xc75/0xec0 [ 33.373366] vma_prepare+0xc54/0x11a0 [ 33.373848] __split_vma+0x5af/0x950 [ 33.374319] ? __pfx___split_vma+0x10/0x10 [ 33.374871] ? find_held_lock+0x2c/0x110 [ 33.375394] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.375960] ? lock_is_held_type+0x9f/0x120 [ 33.376502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.377106] ? mtree_range_walk+0x632/0x900 [ 33.377671] ? mas_walk+0x5c7/0x7c0 [ 33.378147] do_vmi_munmap+0x1f1/0x2b0 [ 33.378654] mmap_region+0x1f9/0x2660 [ 33.379150] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.379701] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.380419] ? __pfx_lock_acquire+0x10/0x10 [ 33.380962] ? __pfx_mmap_region+0x10/0x10 [ 33.381493] ? security_mmap_addr+0x7d/0xa0 [ 33.382033] ? get_unmapped_area+0x1f5/0x3f0 [ 33.382592] do_mmap+0x854/0xf00 [ 33.383035] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.383527] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.384091] ksys_mmap_pgoff+0x3af/0x500 [ 33.384599] do_syscall_64+0x3f/0x90 [ 33.385074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.385717] RIP: 0033:0x7f36defbfd82 [ 33.386170] 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 [ 33.388331] RSP: 002b:00007ffccadf3568 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.389235] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f36defbfd82 [ 33.390078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f36de3f9000 [ 33.390926] RBP: 00007f36de3f9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.391767] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569d1c10ec0 [ 33.392614] R13: 00007ffccadf3580 R14: 00007ffccadf35b0 R15: 00007ffccadf3910 [ 33.393472] [ 33.393765] [ 33.393983] Allocated by task 213: [ 33.394412] kasan_save_stack+0x22/0x50 [ 33.394942] kasan_set_track+0x25/0x30 [ 33.395438] __kasan_slab_alloc+0x59/0x70 [ 33.395965] kmem_cache_alloc+0x16b/0x370 [ 33.396489] vm_area_dup+0x20/0x160 [ 33.396947] __split_vma+0x170/0x950 [ 33.397420] split_vma+0xc6/0x110 [ 33.397879] mprotect_fixup+0x8d2/0xb30 [ 33.398394] do_mprotect_pkey+0x87e/0xd40 [ 33.398920] __x64_sys_mprotect+0x78/0xc0 [ 33.399446] do_syscall_64+0x3f/0x90 [ 33.399919] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.400566] [ 33.400777] Freed by task 213: [ 33.401170] kasan_save_stack+0x22/0x50 [ 33.401690] kasan_set_track+0x25/0x30 [ 33.402183] kasan_save_free_info+0x2b/0x50 [ 33.402725] __kasan_slab_free+0x10a/0x190 [ 33.403328] kmem_cache_free+0x10d/0x4d0 [ 33.403854] rcu_core+0x8c8/0x2860 [ 33.404307] __do_softirq+0x1b7/0x7d4 [ 33.404793] [ 33.405005] Last potentially related work creation: [ 33.405607] kasan_save_stack+0x22/0x50 [ 33.406116] __kasan_record_aux_stack+0x8e/0xa0 [ 33.406707] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.407362] remove_vma+0x139/0x170 [ 33.407816] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.408383] do_vmi_munmap+0x1f1/0x2b0 [ 33.408872] __vm_munmap+0x138/0x3a0 [ 33.409341] __x64_sys_munmap+0x59/0x80 [ 33.409839] do_syscall_64+0x3f/0x90 [ 33.410310] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.410962] [ 33.411179] Second to last potentially related work creation: [ 33.411862] kasan_save_stack+0x22/0x50 [ 33.412368] __kasan_record_aux_stack+0x8e/0xa0 [ 33.412938] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.413582] remove_vma+0x139/0x170 [ 33.414041] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.414622] do_vmi_munmap+0x1f1/0x2b0 [ 33.415110] mmap_region+0x1f9/0x2660 [ 33.415593] do_mmap+0x854/0xf00 [ 33.416024] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.416523] ksys_mmap_pgoff+0x3af/0x500 [ 33.417023] do_syscall_64+0x3f/0x90 [ 33.417498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.418140] [ 33.418358] The buggy address belongs to the object at ffff888009505570 [ 33.418358] which belongs to the cache vm_area_struct of size 168 [ 33.419834] The buggy address is located 88 bytes inside of [ 33.419834] freed 168-byte region [ffff888009505570, ffff888009505618) [ 33.421235] [ 33.421453] The buggy address belongs to the physical page: [ 33.422108] page:00000000d2086369 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9505 [ 33.423200] memcg:ffff888009538701 [ 33.423625] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.424270] page_type: 0xffffffff() [ 33.424721] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.425640] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009538701 [ 33.426571] page dumped because: kasan: bad access detected [ 33.427235] [ 33.427463] Memory state around the buggy address: [ 33.428039] ffff888009505480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.428899] ffff888009505500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 33.429759] >ffff888009505580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.430611] ^ [ 33.431280] ffff888009505600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 33.432138] ffff888009505680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.432990] ================================================================== [ 33.434100] Disabling lock debugging due to kernel taint [ 35.581026] BUG: Bad rss-counter state mm:000000009560612c type:MM_FILEPAGES val:33 [ 35.582199] BUG: Bad rss-counter state mm:000000009560612c type:MM_ANONPAGES val:22 [ 36.021885] BUG: Bad rss-counter state mm:000000005f05a885 type:MM_FILEPAGES val:33 [ 36.022877] BUG: Bad rss-counter state mm:000000005f05a885 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45575' (ECDSA) to the list of known hosts. 2023/06/20 07:48:55 fuzzer started 2023/06/20 07:48:55 dialing manager at localhost:44161 2023/06/20 07:48:55 checking machine... 2023/06/20 07:48:55 checking revisions... [ 36.672984] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:48:56 testing simple program... [ 36.710606] cgroup: Unknown subsys name 'net' [ 36.753249] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:48:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007f7e62643c90 CR3=000000000d616000 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=7a16df57f61f77a05642e58efbb4e4c9 XMM02=000000000011e060eff9b2d0a8fce9cb XMM03=000000000011e1302c67c8bc2e329bc3 XMM04=5d74c2cf8d48c21700000000000ae988 XMM05=19e9129bd510f2350000000000135ca8 XMM06=4fda316b135da52b0000000000135b30 XMM07=e042d86d42eb936e0000000000125078 XMM08=2a7d410c37d09ec9000000000011e130 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b1767 RBX=0000000000000001 RCX=ffffffff863b1762 RDX=0000000000000000 RSI=0000000000000007 RDI=ffffffff85fa3638 RBP=ffff8880146ff760 RSP=ffff8880146ff698 R8 =ffffffff863b1762 R9 =ffff8880146ff748 R10=0000000000038001 R11=000000000008a899 R12=ffff8880146ff768 R13=ffff8880146ff750 R14=ffff8880146ff749 R15=ffff8880146ff708 RIP=ffffffff81130a6e 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 00007f3b234ef900 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=00007ffc19951000 CR3=000000001a7ec000 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=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