syzkaller login: [ 38.961020] BUG: Bad rss-counter state mm:00000000bead2334 type:MM_FILEPAGES val:33 [ 38.962095] BUG: Bad rss-counter state mm:00000000bead2334 type:MM_ANONPAGES val:22 [ 39.118529] ================================================================== [ 39.119515] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.120521] Read of size 8 at addr ffff88800ef05798 by task sshd/227 [ 39.121314] [ 39.121676] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.122631] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.123670] Call Trace: [ 39.124031] [ 39.124331] dump_stack_lvl+0x91/0xf0 [ 39.124872] print_report+0xcc/0x620 [ 39.125423] ? __virt_addr_valid+0x102/0x340 [ 39.126037] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.126713] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.127422] kasan_report+0xbe/0xf0 [ 39.127978] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.128704] vma_interval_tree_remove+0xc75/0xec0 [ 39.129395] vma_prepare+0xc54/0x11a0 [ 39.129944] __split_vma+0x5af/0x950 [ 39.130465] ? __pfx___split_vma+0x10/0x10 [ 39.131041] ? find_held_lock+0x2c/0x110 [ 39.131616] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.132238] ? lock_is_held_type+0x9f/0x120 [ 39.132830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.133517] ? mtree_range_walk+0x632/0x900 [ 39.134146] ? mas_walk+0x5c7/0x7c0 [ 39.134701] do_vmi_munmap+0x1f1/0x2b0 [ 39.135291] mmap_region+0x1f9/0x2660 [ 39.135843] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.136449] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.137331] ? __pfx_lock_acquire+0x10/0x10 [ 39.137981] ? __pfx_mmap_region+0x10/0x10 [ 39.138617] ? security_mmap_addr+0x7d/0xa0 [ 39.139250] ? get_unmapped_area+0x1f5/0x3f0 [ 39.139900] do_mmap+0x854/0xf00 [ 39.140375] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.140907] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.141536] ksys_mmap_pgoff+0x3af/0x500 [ 39.142091] do_syscall_64+0x3f/0x90 [ 39.142641] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.143411] RIP: 0033:0x7f266d75ad82 [ 39.143947] 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 [ 39.146300] RSP: 002b:00007fff3aae67c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.147392] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f266d75ad82 [ 39.148398] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f266cb94000 [ 39.149421] RBP: 00007f266cb94000 R08: 0000000000000009 R09: 0000000000001000 [ 39.150343] R10: 0000000000000812 R11: 0000000000000206 R12: 00005631949a2ec0 [ 39.151277] R13: 00007fff3aae67e0 R14: 00007fff3aae6810 R15: 00007fff3aae6b70 [ 39.152209] [ 39.152527] [ 39.152761] Allocated by task 220: [ 39.153256] kasan_save_stack+0x22/0x50 [ 39.153817] kasan_set_track+0x25/0x30 [ 39.154365] __kasan_slab_alloc+0x59/0x70 [ 39.154933] kmem_cache_alloc+0x16b/0x370 [ 39.155500] vm_area_dup+0x20/0x160 [ 39.155985] __split_vma+0x170/0x950 [ 39.156491] split_vma+0xc6/0x110 [ 39.156980] mprotect_fixup+0x8d2/0xb30 [ 39.157536] do_mprotect_pkey+0x87e/0xd40 [ 39.158109] __x64_sys_mprotect+0x78/0xc0 [ 39.158661] do_syscall_64+0x3f/0x90 [ 39.159174] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.159855] [ 39.160090] Freed by task 0: [ 39.160494] kasan_save_stack+0x22/0x50 [ 39.161056] kasan_set_track+0x25/0x30 [ 39.161594] kasan_save_free_info+0x2b/0x50 [ 39.162163] __kasan_slab_free+0x10a/0x190 [ 39.162741] kmem_cache_free+0x10d/0x4d0 [ 39.163352] rcu_core+0x8c8/0x2860 [ 39.163839] __do_softirq+0x1b7/0x7d4 [ 39.164357] [ 39.164593] Last potentially related work creation: [ 39.165264] kasan_save_stack+0x22/0x50 [ 39.165796] __kasan_record_aux_stack+0x8e/0xa0 [ 39.166417] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.167117] remove_vma+0x139/0x170 [ 39.167614] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.168238] do_vmi_munmap+0x1f1/0x2b0 [ 39.168772] __vm_munmap+0x138/0x3a0 [ 39.169288] __x64_sys_munmap+0x59/0x80 [ 39.169822] do_syscall_64+0x3f/0x90 [ 39.170339] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.171044] [ 39.171274] The buggy address belongs to the object at ffff88800ef05740 [ 39.171274] which belongs to the cache vm_area_struct of size 168 [ 39.172870] The buggy address is located 88 bytes inside of [ 39.172870] freed 168-byte region [ffff88800ef05740, ffff88800ef057e8) [ 39.174575] [ 39.174815] The buggy address belongs to the physical page: [ 39.175518] page:0000000041bad1f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef05 [ 39.176683] memcg:ffff88800efbd001 [ 39.177156] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.177861] page_type: 0xffffffff() [ 39.178398] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.179494] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efbd001 [ 39.180552] page dumped because: kasan: bad access detected [ 39.181367] [ 39.181603] Memory state around the buggy address: [ 39.182257] ffff88800ef05680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.183210] ffff88800ef05700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 39.184158] >ffff88800ef05780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.185203] ^ [ 39.185784] ffff88800ef05800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.186791] ffff88800ef05880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.187799] ================================================================== [ 39.188907] Disabling lock debugging due to kernel taint [ 41.173640] BUG: Bad rss-counter state mm:0000000070112146 type:MM_FILEPAGES val:33 [ 41.174656] BUG: Bad rss-counter state mm:0000000070112146 type:MM_ANONPAGES val:22 [ 41.652150] BUG: Bad rss-counter state mm:000000006cd0b200 type:MM_FILEPAGES val:33 [ 41.653115] BUG: Bad rss-counter state mm:000000006cd0b200 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41797' (ECDSA) to the list of known hosts. 2023/06/19 20:02:51 fuzzer started 2023/06/19 20:02:51 dialing manager at localhost:44161 2023/06/19 20:02:51 checking machine... 2023/06/19 20:02:51 checking revisions... [ 42.397606] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:02:51 testing simple program... [ 42.448757] cgroup: Unknown subsys name 'net' [ 42.498074] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:02:51 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860ee3fe RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880164975b8 RSP=ffff8880164974f0 R8 =ffffffff860ee402 R9 =ffff8880164975a0 R10=0000000000038001 R11=0000000000014ab3 R12=ffff8880164975c0 R13=ffff8880164975a8 R14=ffff888016497b18 R15=ffff888016497560 RIP=ffffffff81131153 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 00007ff4df627900 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=00007fff506e6000 CR3=0000000009492000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fc8f6e8 RCX=0000000000000001 RDX=1ffff11001f91eca RSI=ffff88800fc8f6d8 RDI=ffff88800fc8f650 RBP=ffff88800fc88000 RSP=ffff88800fc8f580 R8 =0000000000000001 R9 =ffff88800fc8f680 R10=0000000000038001 R11=0000000000003c0d R12=ffff88800fc8f6a0 R13=ffff88800fc8f688 R14=ffff88800fc8f6d8 R15=ffff88800fc8f640 RIP=ffffffff81131cac 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 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=00007fee2305b1f0 CR3=000000000e8a8000 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=756e696c2d34365f3638782f62696c2f XMM01=5f69706173736762696c2f756e672d78 XMM02=00322e6f732e3562726b5f6970617373 XMM03=6762696c2f756e672d78756e696c2d34 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000