syzkaller login: [ 30.467030] BUG: Bad rss-counter state mm:0000000025a8037f type:MM_FILEPAGES val:33 [ 30.468294] BUG: Bad rss-counter state mm:0000000025a8037f type:MM_ANONPAGES val:22 [ 30.505652] ================================================================== [ 30.506638] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.507569] Read of size 8 at addr ffff88800f601b38 by task sshd/220 [ 30.508337] [ 30.508551] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.509410] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.510397] Call Trace: [ 30.510717] [ 30.511001] dump_stack_lvl+0x91/0xf0 [ 30.511492] print_report+0xcc/0x620 [ 30.511974] ? __virt_addr_valid+0x102/0x340 [ 30.512520] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.513126] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.513734] kasan_report+0xbe/0xf0 [ 30.514206] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.514830] vma_interval_tree_remove+0xc75/0xec0 [ 30.515431] vma_prepare+0xc54/0x11a0 [ 30.515910] __split_vma+0x5af/0x950 [ 30.516381] ? __pfx___split_vma+0x10/0x10 [ 30.516907] ? find_held_lock+0x2c/0x110 [ 30.517425] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.517986] ? lock_is_held_type+0x9f/0x120 [ 30.518546] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.519146] ? mtree_range_walk+0x632/0x900 [ 30.519700] ? mas_walk+0x5c7/0x7c0 [ 30.520171] do_vmi_munmap+0x1f1/0x2b0 [ 30.520653] mmap_region+0x1f9/0x2660 [ 30.521133] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.521640] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.522354] ? __pfx_lock_acquire+0x10/0x10 [ 30.522885] ? __pfx_mmap_region+0x10/0x10 [ 30.523414] ? security_mmap_addr+0x7d/0xa0 [ 30.523939] ? get_unmapped_area+0x1f5/0x3f0 [ 30.524485] do_mmap+0x854/0xf00 [ 30.524920] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.525412] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.525973] ksys_mmap_pgoff+0x3af/0x500 [ 30.526506] do_syscall_64+0x3f/0x90 [ 30.526993] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.527635] RIP: 0033:0x7fd07c719d82 [ 30.528177] 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 [ 30.530811] RSP: 002b:00007fff1f7ad4d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.531916] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd07c719d82 [ 30.532957] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd07bb53000 [ 30.534000] RBP: 00007fd07bb53000 R08: 0000000000000009 R09: 0000000000001000 [ 30.534827] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556bd2e05ec0 [ 30.535630] R13: 00007fff1f7ad4f0 R14: 00007fff1f7ad520 R15: 00007fff1f7ad880 [ 30.536428] [ 30.536704] [ 30.536908] Allocated by task 213: [ 30.537309] kasan_save_stack+0x22/0x50 [ 30.537783] kasan_set_track+0x25/0x30 [ 30.538248] __kasan_slab_alloc+0x59/0x70 [ 30.538764] kmem_cache_alloc+0x16b/0x370 [ 30.539249] vm_area_dup+0x20/0x160 [ 30.539677] __split_vma+0x170/0x950 [ 30.540116] split_vma+0xc6/0x110 [ 30.540531] mprotect_fixup+0x8d2/0xb30 [ 30.541008] do_mprotect_pkey+0x87e/0xd40 [ 30.541497] __x64_sys_mprotect+0x78/0xc0 [ 30.541987] do_syscall_64+0x3f/0x90 [ 30.542443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.543047] [ 30.543252] Freed by task 213: [ 30.543622] kasan_save_stack+0x22/0x50 [ 30.544120] kasan_set_track+0x25/0x30 [ 30.544603] kasan_save_free_info+0x2b/0x50 [ 30.545137] __kasan_slab_free+0x10a/0x190 [ 30.545659] kmem_cache_free+0x10d/0x4d0 [ 30.546168] rcu_core+0x8c8/0x2860 [ 30.546626] __do_softirq+0x1b7/0x7d4 [ 30.547108] [ 30.547322] Last potentially related work creation: [ 30.547899] kasan_save_stack+0x22/0x50 [ 30.548394] __kasan_record_aux_stack+0x8e/0xa0 [ 30.548961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.549590] remove_vma+0x139/0x170 [ 30.550032] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.550587] do_vmi_munmap+0x1f1/0x2b0 [ 30.551065] __vm_munmap+0x138/0x3a0 [ 30.551526] __x64_sys_munmap+0x59/0x80 [ 30.552018] do_syscall_64+0x3f/0x90 [ 30.552491] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.553120] [ 30.553337] The buggy address belongs to the object at ffff88800f601ae0 [ 30.553337] which belongs to the cache vm_area_struct of size 168 [ 30.554800] The buggy address is located 88 bytes inside of [ 30.554800] freed 168-byte region [ffff88800f601ae0, ffff88800f601b88) [ 30.556187] [ 30.556399] The buggy address belongs to the physical page: [ 30.557055] page:00000000e94de220 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf601 [ 30.558125] memcg:ffff88800fb3b401 [ 30.558559] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.559206] page_type: 0xffffffff() [ 30.559653] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.560568] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb3b401 [ 30.561452] page dumped because: kasan: bad access detected [ 30.562110] [ 30.562329] Memory state around the buggy address: [ 30.562912] ffff88800f601a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.563747] ffff88800f601a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 30.564590] >ffff88800f601b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.565430] ^ [ 30.566030] ffff88800f601b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.566877] ffff88800f601c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.567722] ================================================================== [ 30.568915] Disabling lock debugging due to kernel taint [ 32.416669] BUG: Bad rss-counter state mm:0000000075645fbb type:MM_FILEPAGES val:33 [ 32.417438] BUG: Bad rss-counter state mm:0000000075645fbb type:MM_ANONPAGES val:22 [ 32.882649] BUG: Bad rss-counter state mm:00000000b0a4d27c type:MM_FILEPAGES val:33 [ 32.884008] BUG: Bad rss-counter state mm:00000000b0a4d27c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34562' (ECDSA) to the list of known hosts. 2023/06/21 04:05:17 fuzzer started 2023/06/21 04:05:17 dialing manager at localhost:36067 2023/06/21 04:05:17 checking machine... 2023/06/21 04:05:17 checking revisions... [ 33.529451] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:05:17 testing simple program... [ 33.582971] cgroup: Unknown subsys name 'net' [ 33.652185] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:05:17 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce09a98 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff888016d4fad8 RDI=ffffffff813ad720 RBP=ffff88806ce09af0 RSP=ffff88806ce09a80 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888016541b40 R15=ffff888009d06b30 RIP=ffffffff811303b2 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 00007fd960ff8900 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=00007ffe2fa4a000 CR3=0000000019baa000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3eb87d5320 CR3=000000000e5a6000 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=2037313a35303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036313a35303a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000