syzkaller login: [ 38.926735] sshd (213) used greatest stack depth: 23992 bytes left [ 38.928506] BUG: Bad rss-counter state mm:0000000031ea1c15 type:MM_FILEPAGES val:33 [ 38.930134] BUG: Bad rss-counter state mm:0000000031ea1c15 type:MM_ANONPAGES val:22 [ 39.093670] ================================================================== [ 39.094574] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.095520] Read of size 8 at addr ffff88800e3a9d08 by task sshd/220 [ 39.096299] [ 39.096521] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.097464] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.098442] Call Trace: [ 39.098760] [ 39.099045] dump_stack_lvl+0x91/0xf0 [ 39.099538] print_report+0xcc/0x620 [ 39.100055] ? __virt_addr_valid+0x102/0x340 [ 39.100613] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.101231] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.101852] kasan_report+0xbe/0xf0 [ 39.102332] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.102952] vma_interval_tree_remove+0xc75/0xec0 [ 39.103563] vma_prepare+0xc54/0x11a0 [ 39.104063] __split_vma+0x5af/0x950 [ 39.104536] ? __pfx___split_vma+0x10/0x10 [ 39.105071] ? find_held_lock+0x2c/0x110 [ 39.105594] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.106164] ? lock_is_held_type+0x9f/0x120 [ 39.106702] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.107311] ? mtree_range_walk+0x632/0x900 [ 39.107869] ? mas_walk+0x5c7/0x7c0 [ 39.108346] do_vmi_munmap+0x1f1/0x2b0 [ 39.108842] mmap_region+0x1f9/0x2660 [ 39.109328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.109845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.110567] ? __pfx_lock_acquire+0x10/0x10 [ 39.111102] ? __pfx_mmap_region+0x10/0x10 [ 39.111632] ? security_mmap_addr+0x7d/0xa0 [ 39.112189] ? get_unmapped_area+0x1f5/0x3f0 [ 39.112742] do_mmap+0x854/0xf00 [ 39.113184] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.113681] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.114247] ksys_mmap_pgoff+0x3af/0x500 [ 39.114757] do_syscall_64+0x3f/0x90 [ 39.115233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.115889] RIP: 0033:0x7f760d268d82 [ 39.116345] 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 [ 39.118482] RSP: 002b:00007ffd5ec71338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.119393] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f760d268d82 [ 39.120262] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f760c6a2000 [ 39.121122] RBP: 00007f760c6a2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.121976] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ca0da1b20 [ 39.122840] R13: 00007ffd5ec71350 R14: 00007ffd5ec71380 R15: 00007ffd5ec716e0 [ 39.123706] [ 39.124008] [ 39.124227] Allocated by task 213: [ 39.124670] kasan_save_stack+0x22/0x50 [ 39.125186] kasan_set_track+0x25/0x30 [ 39.125701] __kasan_slab_alloc+0x59/0x70 [ 39.126226] kmem_cache_alloc+0x16b/0x370 [ 39.126760] vm_area_dup+0x20/0x160 [ 39.127228] __split_vma+0x170/0x950 [ 39.127699] split_vma+0xc6/0x110 [ 39.128146] mprotect_fixup+0x8d2/0xb30 [ 39.128657] do_mprotect_pkey+0x87e/0xd40 [ 39.129182] __x64_sys_mprotect+0x78/0xc0 [ 39.129717] do_syscall_64+0x3f/0x90 [ 39.130214] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.130889] [ 39.131112] Freed by task 204: [ 39.131524] kasan_save_stack+0x22/0x50 [ 39.132074] kasan_set_track+0x25/0x30 [ 39.132595] kasan_save_free_info+0x2b/0x50 [ 39.133156] __kasan_slab_free+0x10a/0x190 [ 39.133718] kmem_cache_free+0x10d/0x4d0 [ 39.134251] rcu_core+0x8c8/0x2860 [ 39.134719] __do_softirq+0x1b7/0x7d4 [ 39.135221] [ 39.135446] Last potentially related work creation: [ 39.136090] kasan_save_stack+0x22/0x50 [ 39.136625] __kasan_record_aux_stack+0x8e/0xa0 [ 39.137255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.137941] remove_vma+0x139/0x170 [ 39.138434] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.139035] do_vmi_munmap+0x1f1/0x2b0 [ 39.139547] __vm_munmap+0x138/0x3a0 [ 39.140045] __x64_sys_munmap+0x59/0x80 [ 39.140572] do_syscall_64+0x3f/0x90 [ 39.141081] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.141766] [ 39.141998] Second to last potentially related work creation: [ 39.142722] kasan_save_stack+0x22/0x50 [ 39.143254] __kasan_record_aux_stack+0x8e/0xa0 [ 39.143888] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.144579] remove_vma+0x139/0x170 [ 39.145055] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.145644] do_vmi_munmap+0x1f1/0x2b0 [ 39.146160] mmap_region+0x1f9/0x2660 [ 39.146658] do_mmap+0x854/0xf00 [ 39.147121] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.147641] ksys_mmap_pgoff+0x3af/0x500 [ 39.148188] do_syscall_64+0x3f/0x90 [ 39.148682] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.149373] [ 39.149604] The buggy address belongs to the object at ffff88800e3a9cb0 [ 39.149604] which belongs to the cache vm_area_struct of size 168 [ 39.151185] The buggy address is located 88 bytes inside of [ 39.151185] freed 168-byte region [ffff88800e3a9cb0, ffff88800e3a9d58) [ 39.152693] [ 39.152917] The buggy address belongs to the physical page: [ 39.153627] page:00000000ece5f66a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3a9 [ 39.154784] memcg:ffff88800ca92301 [ 39.155243] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.155998] page_type: 0xffffffff() [ 39.156470] raw: 0100000000000200 ffff88800879fc80 ffffea0000398580 dead000000000005 [ 39.157467] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca92301 [ 39.158447] page dumped because: kasan: bad access detected [ 39.159148] [ 39.159377] Memory state around the buggy address: [ 39.160002] ffff88800e3a9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 39.160928] ffff88800e3a9c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.161837] >ffff88800e3a9d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.162740] ^ [ 39.163214] ffff88800e3a9d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.164147] ffff88800e3a9e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.165056] ================================================================== [ 39.166096] Disabling lock debugging due to kernel taint [ 41.408492] BUG: Bad rss-counter state mm:00000000ceab1e8b type:MM_FILEPAGES val:33 [ 41.409678] BUG: Bad rss-counter state mm:00000000ceab1e8b type:MM_ANONPAGES val:22 [ 41.803065] BUG: Bad rss-counter state mm:0000000044c21c81 type:MM_FILEPAGES val:33 [ 41.804156] BUG: Bad rss-counter state mm:0000000044c21c81 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19870' (ECDSA) to the list of known hosts. 2023/06/19 15:34:11 fuzzer started 2023/06/19 15:34:11 dialing manager at localhost:44161 2023/06/19 15:34:11 checking machine... 2023/06/19 15:34:11 checking revisions... [ 42.549143] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:34:11 testing simple program... [ 42.603193] cgroup: Unknown subsys name 'net' [ 42.651897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:34:10 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=00007f3287111b70 CR3=000000000d548000 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=b00fe947407cd5b787443570497ece0b XMM02=000000000011d698ec2efd57dc4c00df XMM03=0000000000124038d94bb0bcef2a7913 XMM04=9b8c73cd5bb32a2900000000000ae988 XMM05=19e9129bd510f2350000000000134e00 XMM06=1fd955d7249f1e030000000000133fd8 XMM07=e042d86d42eb936e0000000000124310 XMM08=d94bb0bcef2a7913000000000011d6f8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb3e41 RBX=ffffffff85d9f208 RCX=ffffffff811fc523 RDX=0000000000000000 RSI=ffffffff860ab102 RDI=ffffffff85d9f1f8 RBP=ffffffff85d9f1f8 RSP=ffff888018e878a0 R8 =ffffffff860ab102 R9 =ffff888018e87998 R10=0000000000038001 R11=0000000000009789 R12=ffffffff85d9f218 R13=ffffffff85d9f1f8 R14=ffffffff85d9f1f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----AP-] 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 00007f49a8fef900 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=00007ffef04d4000 CR3=000000000f170000 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=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