syzkaller login: [ 46.573677] BUG: Bad rss-counter state mm:00000000c2cf0a94 type:MM_FILEPAGES val:33 [ 46.575340] BUG: Bad rss-counter state mm:00000000c2cf0a94 type:MM_ANONPAGES val:22 [ 46.733239] ================================================================== [ 46.734193] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.735132] Read of size 8 at addr ffff88800e845798 by task sshd/220 [ 46.735923] [ 46.736145] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.737111] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.738097] Call Trace: [ 46.738416] [ 46.738809] dump_stack_lvl+0x91/0xf0 [ 46.739327] print_report+0xcc/0x620 [ 46.739817] ? __virt_addr_valid+0x102/0x340 [ 46.740368] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.740995] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.741610] kasan_report+0xbe/0xf0 [ 46.742090] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.742714] vma_interval_tree_remove+0xc75/0xec0 [ 46.743326] vma_prepare+0xc54/0x11a0 [ 46.743808] __split_vma+0x5af/0x950 [ 46.744287] ? __pfx___split_vma+0x10/0x10 [ 46.744828] ? find_held_lock+0x2c/0x110 [ 46.745347] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.745927] ? lock_is_held_type+0x9f/0x120 [ 46.746467] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.747071] ? mtree_range_walk+0x632/0x900 [ 46.747652] ? mas_walk+0x5c7/0x7c0 [ 46.748126] do_vmi_munmap+0x1f1/0x2b0 [ 46.748623] mmap_region+0x1f9/0x2660 [ 46.749110] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.749619] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.750353] ? __pfx_lock_acquire+0x10/0x10 [ 46.750887] ? __pfx_mmap_region+0x10/0x10 [ 46.751433] ? security_mmap_addr+0x7d/0xa0 [ 46.751958] ? get_unmapped_area+0x1f5/0x3f0 [ 46.752502] do_mmap+0x854/0xf00 [ 46.752945] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.753437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.754001] ksys_mmap_pgoff+0x3af/0x500 [ 46.754508] do_syscall_64+0x3f/0x90 [ 46.754980] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.755643] RIP: 0033:0x7f9defabed82 [ 46.756100] 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 [ 46.758209] RSP: 002b:00007ffe3814f5e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.759112] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9defabed82 [ 46.759971] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9deeef8000 [ 46.760806] RBP: 00007f9deeef8000 R08: 0000000000000009 R09: 0000000000001000 [ 46.761642] R10: 0000000000000812 R11: 0000000000000206 R12: 000055555a8b4ec0 [ 46.762492] R13: 00007ffe3814f600 R14: 00007ffe3814f630 R15: 00007ffe3814f990 [ 46.763366] [ 46.763659] [ 46.763880] Allocated by task 213: [ 46.764307] kasan_save_stack+0x22/0x50 [ 46.764809] kasan_set_track+0x25/0x30 [ 46.765300] __kasan_slab_alloc+0x59/0x70 [ 46.765822] kmem_cache_alloc+0x16b/0x370 [ 46.766329] vm_area_dup+0x20/0x160 [ 46.766782] __split_vma+0x170/0x950 [ 46.767253] split_vma+0xc6/0x110 [ 46.767689] mprotect_fixup+0x8d2/0xb30 [ 46.768193] do_mprotect_pkey+0x87e/0xd40 [ 46.768711] __x64_sys_mprotect+0x78/0xc0 [ 46.769228] do_syscall_64+0x3f/0x90 [ 46.769701] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.770345] [ 46.770560] Freed by task 213: [ 46.770950] kasan_save_stack+0x22/0x50 [ 46.771471] kasan_set_track+0x25/0x30 [ 46.771970] kasan_save_free_info+0x2b/0x50 [ 46.772501] __kasan_slab_free+0x10a/0x190 [ 46.773041] kmem_cache_free+0x10d/0x4d0 [ 46.773552] rcu_core+0x8c8/0x2860 [ 46.773994] __do_softirq+0x1b7/0x7d4 [ 46.774470] [ 46.774686] Last potentially related work creation: [ 46.775268] kasan_save_stack+0x22/0x50 [ 46.775768] __kasan_record_aux_stack+0x8e/0xa0 [ 46.776338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.776980] remove_vma+0x139/0x170 [ 46.777427] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.777982] do_vmi_munmap+0x1f1/0x2b0 [ 46.778463] __vm_munmap+0x138/0x3a0 [ 46.778932] __x64_sys_munmap+0x59/0x80 [ 46.779442] do_syscall_64+0x3f/0x90 [ 46.779917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.780565] [ 46.780778] The buggy address belongs to the object at ffff88800e845740 [ 46.780778] which belongs to the cache vm_area_struct of size 168 [ 46.782257] The buggy address is located 88 bytes inside of [ 46.782257] freed 168-byte region [ffff88800e845740, ffff88800e8457e8) [ 46.783672] [ 46.783890] The buggy address belongs to the physical page: [ 46.784545] page:00000000dfbf459b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe845 [ 46.785622] memcg:ffff88800d33fb01 [ 46.786040] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 46.786741] page_type: 0xffffffff() [ 46.787199] raw: 0100000000000200 ffff88800879fc80 ffffea0000389880 0000000000000005 [ 46.788119] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d33fb01 [ 46.789022] page dumped because: kasan: bad access detected [ 46.789677] [ 46.789892] Memory state around the buggy address: [ 46.790464] ffff88800e845680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.791335] ffff88800e845700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 46.792194] >ffff88800e845780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 46.793037] ^ [ 46.793524] ffff88800e845800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 46.794375] ffff88800e845880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 46.795236] ================================================================== [ 46.796201] Disabling lock debugging due to kernel taint [ 49.611421] BUG: Bad rss-counter state mm:000000003225d1ae type:MM_FILEPAGES val:33 [ 49.612152] BUG: Bad rss-counter state mm:000000003225d1ae type:MM_ANONPAGES val:22 [ 50.043950] BUG: Bad rss-counter state mm:000000003b659448 type:MM_FILEPAGES val:33 [ 50.045165] BUG: Bad rss-counter state mm:000000003b659448 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:58467' (ECDSA) to the list of known hosts. 2023/06/20 00:42:35 fuzzer started 2023/06/20 00:42:35 dialing manager at localhost:44161 2023/06/20 00:42:35 checking machine... 2023/06/20 00:42:35 checking revisions... [ 50.808386] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:42:35 testing simple program... [ 50.850755] cgroup: Unknown subsys name 'net' [ 50.904509] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:42:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff8880069d3c60 RCX=0000000000000000 RDX=ffff888019abb680 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000003 RSP=ffff888016b67dc8 R8 =0000000000000004 R9 =0000000000000003 R10=0000000000000040 R11=00000000000b6996 R12=0000000000000001 R13=ffff8880069d3d18 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c02f4 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f10ca245900 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=00007f3ea560b790 CR3=000000000c8a0000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007f10ca7fa650 CR3=000000000fc7c000 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=2034333a32343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a32343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000