syzkaller login: [ 39.138716] BUG: Bad rss-counter state mm:00000000140853cc type:MM_FILEPAGES val:33 [ 39.139912] BUG: Bad rss-counter state mm:00000000140853cc type:MM_ANONPAGES val:22 [ 39.313694] ================================================================== [ 39.314609] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.315561] Read of size 8 at addr ffff88800f266798 by task sshd/219 [ 39.316336] [ 39.316550] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.317527] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.318521] Call Trace: [ 39.318843] <TASK> [ 39.319169] dump_stack_lvl+0x91/0xf0 [ 39.319668] print_report+0xcc/0x620 [ 39.320156] ? __virt_addr_valid+0x102/0x340 [ 39.320717] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.321337] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.321963] kasan_report+0xbe/0xf0 [ 39.322449] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.323093] vma_interval_tree_remove+0xc75/0xec0 [ 39.323714] vma_prepare+0xc54/0x11a0 [ 39.324214] __split_vma+0x5af/0x950 [ 39.324694] ? __pfx___split_vma+0x10/0x10 [ 39.325232] ? find_held_lock+0x2c/0x110 [ 39.325766] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.326337] ? lock_is_held_type+0x9f/0x120 [ 39.326887] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.327526] ? mtree_range_walk+0x632/0x900 [ 39.328085] ? mas_walk+0x5c7/0x7c0 [ 39.328562] do_vmi_munmap+0x1f1/0x2b0 [ 39.329059] mmap_region+0x1f9/0x2660 [ 39.329549] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.330066] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.330789] ? __pfx_lock_acquire+0x10/0x10 [ 39.331345] ? __pfx_mmap_region+0x10/0x10 [ 39.331887] ? security_mmap_addr+0x7d/0xa0 [ 39.332423] ? get_unmapped_area+0x1f5/0x3f0 [ 39.332981] do_mmap+0x854/0xf00 [ 39.333431] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.333934] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.334510] ksys_mmap_pgoff+0x3af/0x500 [ 39.335034] do_syscall_64+0x3f/0x90 [ 39.335524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.336172] RIP: 0033:0x7fd02ae8ed82 [ 39.336629] 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 [ 39.338765] RSP: 002b:00007fff938872e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.339701] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd02ae8ed82 [ 39.340560] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd02a2c8000 [ 39.341409] RBP: 00007fd02a2c8000 R08: 0000000000000009 R09: 0000000000001000 [ 39.342256] R10: 0000000000000812 R11: 0000000000000206 R12: 000056079deeaf70 [ 39.343124] R13: 00007fff93887300 R14: 00007fff93887330 R15: 00007fff93887690 [ 39.343987] </TASK> [ 39.344281] [ 39.344503] Allocated by task 212: [ 39.344928] kasan_save_stack+0x22/0x50 [ 39.345442] kasan_set_track+0x25/0x30 [ 39.345945] __kasan_slab_alloc+0x59/0x70 [ 39.346476] kmem_cache_alloc+0x16b/0x370 [ 39.347007] vm_area_dup+0x20/0x160 [ 39.347477] __split_vma+0x170/0x950 [ 39.347948] split_vma+0xc6/0x110 [ 39.348409] mprotect_fixup+0x8d2/0xb30 [ 39.348914] do_mprotect_pkey+0x87e/0xd40 [ 39.349436] __x64_sys_mprotect+0x78/0xc0 [ 39.349969] do_syscall_64+0x3f/0x90 [ 39.350449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.351120] [ 39.351335] Freed by task 212: [ 39.351728] kasan_save_stack+0x22/0x50 [ 39.352238] kasan_set_track+0x25/0x30 [ 39.352739] kasan_save_free_info+0x2b/0x50 [ 39.353286] __kasan_slab_free+0x10a/0x190 [ 39.353826] kmem_cache_free+0x10d/0x4d0 [ 39.354337] rcu_core+0x8c8/0x2860 [ 39.354786] __do_softirq+0x1b7/0x7d4 [ 39.355282] [ 39.355495] Last potentially related work creation: [ 39.356089] kasan_save_stack+0x22/0x50 [ 39.356601] __kasan_record_aux_stack+0x8e/0xa0 [ 39.357183] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.357829] remove_vma+0x139/0x170 [ 39.358283] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.358842] do_vmi_munmap+0x1f1/0x2b0 [ 39.359362] __vm_munmap+0x138/0x3a0 [ 39.359845] __x64_sys_munmap+0x59/0x80 [ 39.360347] do_syscall_64+0x3f/0x90 [ 39.360835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.361487] [ 39.361705] Second to last potentially related work creation: [ 39.362394] kasan_save_stack+0x22/0x50 [ 39.362898] __kasan_record_aux_stack+0x8e/0xa0 [ 39.363501] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.364150] remove_vma+0x139/0x170 [ 39.364611] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.365178] do_vmi_munmap+0x1f1/0x2b0 [ 39.365674] mmap_region+0x1f9/0x2660 [ 39.366163] do_mmap+0x854/0xf00 [ 39.366607] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.367124] ksys_mmap_pgoff+0x3af/0x500 [ 39.367636] do_syscall_64+0x3f/0x90 [ 39.368111] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.368756] [ 39.368971] The buggy address belongs to the object at ffff88800f266740 [ 39.368971] which belongs to the cache vm_area_struct of size 168 [ 39.370438] The buggy address is located 88 bytes inside of [ 39.370438] freed 168-byte region [ffff88800f266740, ffff88800f2667e8) [ 39.371860] [ 39.372075] The buggy address belongs to the physical page: [ 39.372746] page:0000000003a1c3a8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf266 [ 39.373839] memcg:ffff88800eb92001 [ 39.374279] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.375006] page_type: 0xffffffff() [ 39.375458] raw: 0100000000000200 ffff88800879fc80 ffffea0000629480 0000000000000005 [ 39.376379] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb92001 [ 39.377292] page dumped because: kasan: bad access detected [ 39.377949] [ 39.378171] Memory state around the buggy address: [ 39.378762] ffff88800f266680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.379638] ffff88800f266700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.380503] >ffff88800f266780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.381364] ^ [ 39.381860] ffff88800f266800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 39.382750] ffff88800f266880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 39.383625] ================================================================== [ 39.384601] Disabling lock debugging due to kernel taint [ 41.343191] BUG: Bad rss-counter state mm:00000000ce4278ed type:MM_FILEPAGES val:33 [ 41.344344] BUG: Bad rss-counter state mm:00000000ce4278ed type:MM_ANONPAGES val:22 [ 41.724540] BUG: Bad rss-counter state mm:00000000e7698a87 type:MM_FILEPAGES val:33 [ 41.725753] BUG: Bad rss-counter state mm:00000000e7698a87 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54164' (ECDSA) to the list of known hosts. 2023/06/20 04:40:04 fuzzer started 2023/06/20 04:40:05 dialing manager at localhost:44161 2023/06/20 04:40:05 checking machine... 2023/06/20 04:40:05 checking revisions... [ 42.425364] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:40:05 testing simple program... [ 42.481262] cgroup: Unknown subsys name 'net' [ 42.532085] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:40:04 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff8171697f RDX=ffff888018b0d1c0 RSI=0000000000000000 RDI=0000000000000006 RBP=00007fff8ba52c1c RSP=ffff888015b87de0 R8 =0000000000000006 R9 =00007fff8ba59000 R10=00007fff8ba52c1c R11=0000000000000000 R12=ffff88800edabe80 R13=00007fff8ba59000 R14=0000000000000001 R15=ffff88800edabeb0 RIP=ffffffff814c0245 RFL=00000293 [--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f2808975900 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=00007fff8ba52c1c CR3=00000000145e6000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=bff92fc0e2b83e691e09e389a942224e XMM05=00000000000000000000000000000000 XMM06=73732f6363753e3d1e0972206842223d XMM07=672065736f6c635f6e6f69737365733a 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=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=00007fde3ffb1110 CR3=000000000c4e4000 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=7dc78f9f23de9daffa45301bdbca7897 XMM02=2c67c8bc2e329bc3000000000011e4d8 XMM03=fb795ef6d65770560000000000124700 XMM04=4d00c8ada041d7c500000000000ae988 XMM05=dfcdbad4f1609c370000000000135380 XMM06=806171799158d9670000000000135208 XMM07=e042d86d42eb936e00000000001249d8 XMM08=f50e45959fff0a82000000000011e538 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000