syzkaller login: [ 31.323033] BUG: Bad rss-counter state mm:0000000027218146 type:MM_FILEPAGES val:33 [ 31.324199] BUG: Bad rss-counter state mm:0000000027218146 type:MM_ANONPAGES val:22 [ 31.369245] ================================================================== [ 31.370466] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.371494] Read of size 8 at addr ffff88800d971880 by task sshd/220 [ 31.372348] [ 31.372581] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.373514] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.374578] Call Trace: [ 31.374944] [ 31.375255] dump_stack_lvl+0x91/0xf0 [ 31.375781] print_report+0xcc/0x620 [ 31.376340] ? __virt_addr_valid+0x102/0x340 [ 31.376964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.377637] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.378314] kasan_report+0xbe/0xf0 [ 31.378839] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.379531] vma_interval_tree_remove+0xc75/0xec0 [ 31.380224] vma_prepare+0xc54/0x11a0 [ 31.380743] __split_vma+0x5af/0x950 [ 31.381268] ? __pfx___split_vma+0x10/0x10 [ 31.381849] ? find_held_lock+0x2c/0x110 [ 31.382431] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.383067] ? lock_is_held_type+0x9f/0x120 [ 31.383660] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.384346] ? mtree_range_walk+0x632/0x900 [ 31.384969] ? mas_walk+0x5c7/0x7c0 [ 31.385493] do_vmi_munmap+0x1f1/0x2b0 [ 31.386051] mmap_region+0x1f9/0x2660 [ 31.386581] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.387170] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.387964] ? __pfx_lock_acquire+0x10/0x10 [ 31.388580] ? __pfx_mmap_region+0x10/0x10 [ 31.389160] ? security_mmap_addr+0x7d/0xa0 [ 31.389725] ? get_unmapped_area+0x1f5/0x3f0 [ 31.390333] do_mmap+0x854/0xf00 [ 31.390816] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.391371] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.391989] ksys_mmap_pgoff+0x3af/0x500 [ 31.392551] do_syscall_64+0x3f/0x90 [ 31.393086] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.393782] RIP: 0033:0x7fb7a6a6bd82 [ 31.394290] 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 [ 31.396693] RSP: 002b:00007ffc88fe3578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.397704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb7a6a6bd82 [ 31.398651] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb7a5ea5000 [ 31.399618] RBP: 00007fb7a5ea5000 R08: 0000000000000009 R09: 0000000000001000 [ 31.400587] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c443c6ec0 [ 31.401542] R13: 00007ffc88fe3590 R14: 00007ffc88fe35c0 R15: 00007ffc88fe3920 [ 31.402514] [ 31.402848] [ 31.403105] Allocated by task 213: [ 31.403584] kasan_save_stack+0x22/0x50 [ 31.404190] kasan_set_track+0x25/0x30 [ 31.404741] __kasan_slab_alloc+0x59/0x70 [ 31.405332] kmem_cache_alloc+0x16b/0x370 [ 31.405919] vm_area_dup+0x20/0x160 [ 31.406420] __split_vma+0x170/0x950 [ 31.406951] split_vma+0xc6/0x110 [ 31.407448] mprotect_fixup+0x8d2/0xb30 [ 31.407990] do_mprotect_pkey+0x87e/0xd40 [ 31.408559] __x64_sys_mprotect+0x78/0xc0 [ 31.409123] do_syscall_64+0x3f/0x90 [ 31.409625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.410320] [ 31.410550] Freed by task 213: [ 31.410988] kasan_save_stack+0x22/0x50 [ 31.411519] kasan_set_track+0x25/0x30 [ 31.412073] kasan_save_free_info+0x2b/0x50 [ 31.412644] __kasan_slab_free+0x10a/0x190 [ 31.413222] kmem_cache_free+0x10d/0x4d0 [ 31.413758] rcu_core+0x8c8/0x2860 [ 31.414249] __do_softirq+0x1b7/0x7d4 [ 31.414757] [ 31.415013] Last potentially related work creation: [ 31.415638] kasan_save_stack+0x22/0x50 [ 31.416223] __kasan_record_aux_stack+0x8e/0xa0 [ 31.416865] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.417575] remove_vma+0x139/0x170 [ 31.418085] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.418696] do_vmi_munmap+0x1f1/0x2b0 [ 31.419261] __vm_munmap+0x138/0x3a0 [ 31.419770] __x64_sys_munmap+0x59/0x80 [ 31.420341] do_syscall_64+0x3f/0x90 [ 31.420871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.421585] [ 31.421822] The buggy address belongs to the object at ffff88800d971828 [ 31.421822] which belongs to the cache vm_area_struct of size 168 [ 31.423496] The buggy address is located 88 bytes inside of [ 31.423496] freed 168-byte region [ffff88800d971828, ffff88800d9718d0) [ 31.425079] [ 31.425309] The buggy address belongs to the physical page: [ 31.426027] page:00000000d59eff21 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd971 [ 31.427201] memcg:ffff88800c9fc101 [ 31.427659] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.428373] page_type: 0xffffffff() [ 31.428863] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.429855] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c9fc101 [ 31.430826] page dumped because: kasan: bad access detected [ 31.431549] [ 31.431778] Memory state around the buggy address: [ 31.432430] ffff88800d971780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 31.433379] ffff88800d971800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.434330] >ffff88800d971880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.435300] ^ [ 31.435761] ffff88800d971900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.436726] ffff88800d971980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 31.437674] ================================================================== [ 31.439273] Disabling lock debugging due to kernel taint [ 32.991696] BUG: Bad rss-counter state mm:0000000056fd33cb type:MM_FILEPAGES val:33 [ 32.992970] BUG: Bad rss-counter state mm:0000000056fd33cb type:MM_ANONPAGES val:22 [ 33.464881] BUG: Bad rss-counter state mm:00000000674480e9 type:MM_FILEPAGES val:33 [ 33.466644] BUG: Bad rss-counter state mm:00000000674480e9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22685' (ECDSA) to the list of known hosts. 2023/06/21 00:30:49 fuzzer started 2023/06/21 00:30:49 dialing manager at localhost:36067 2023/06/21 00:30:49 checking machine... 2023/06/21 00:30:49 checking revisions... [ 34.241983] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:30:49 testing simple program... [ 34.283850] cgroup: Unknown subsys name 'net' [ 34.335557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:30:49 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff81f056d5 RDX=0000000000000010 RSI=0000000000000005 RDI=0000000000000005 RBP=ffffffff849c0ac0 RSP=ffff88800f8dfd08 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000010 R11=0000000000000000 R12=0000000000000010 R13=0000000000000005 R14=0000000000000007 R15=ffff888015de0000 RIP=ffffffff814c0240 RFL=00000206 [-----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 00007fa0d6e06900 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=00007fa0d73be0b0 CR3=000000000db5e000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f229ea07590 CR3=000000000d844000 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=3ad9ba72156f408c94434bbb984c214b XMM02=2c67c8bc2e329bc3000000000011b818 XMM03=fb795ef6d657705600000000001221f0 XMM04=9b7c72eec7b67ac500000000000ae988 XMM05=19e9129bd510f2350000000000132048 XMM06=493158a08ae55d490000000000130eb0 XMM07=e042d86d42eb936e0000000000122470 XMM08=fefe025e6d1b8e54000000000011b878 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000