syzkaller login: [ 31.077321] BUG: Bad rss-counter state mm:00000000760040ca type:MM_FILEPAGES val:33 [ 31.078366] BUG: Bad rss-counter state mm:00000000760040ca type:MM_ANONPAGES val:22 [ 31.239555] ================================================================== [ 31.240493] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.241440] Read of size 8 at addr ffff88800c9674e0 by task sshd/221 [ 31.242236] [ 31.242457] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.243461] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.244454] Call Trace: [ 31.244781] [ 31.245076] dump_stack_lvl+0x91/0xf0 [ 31.245581] print_report+0xcc/0x620 [ 31.246091] ? __virt_addr_valid+0x102/0x340 [ 31.246660] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247289] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.247922] kasan_report+0xbe/0xf0 [ 31.248406] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.249043] vma_interval_tree_remove+0xc75/0xec0 [ 31.249661] vma_prepare+0xc54/0x11a0 [ 31.250160] __split_vma+0x5af/0x950 [ 31.250634] ? __pfx___split_vma+0x10/0x10 [ 31.251171] ? find_held_lock+0x2c/0x110 [ 31.251711] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.252285] ? lock_is_held_type+0x9f/0x120 [ 31.252840] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.253451] ? mtree_range_walk+0x632/0x900 [ 31.254029] ? mas_walk+0x5c7/0x7c0 [ 31.254510] do_vmi_munmap+0x1f1/0x2b0 [ 31.255003] mmap_region+0x1f9/0x2660 [ 31.255500] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.256012] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.256745] ? __pfx_lock_acquire+0x10/0x10 [ 31.257287] ? __pfx_mmap_region+0x10/0x10 [ 31.257822] ? security_mmap_addr+0x7d/0xa0 [ 31.258363] ? get_unmapped_area+0x1f5/0x3f0 [ 31.258924] do_mmap+0x854/0xf00 [ 31.259368] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.259863] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.260424] ksys_mmap_pgoff+0x3af/0x500 [ 31.260931] do_syscall_64+0x3f/0x90 [ 31.261412] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.262116] RIP: 0033:0x7f38665b8d82 [ 31.262588] 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 [ 31.264724] RSP: 002b:00007ffd12c14d68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.265649] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38665b8d82 [ 31.266509] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38659f2000 [ 31.267355] RBP: 00007f38659f2000 R08: 0000000000000009 R09: 0000000000001000 [ 31.268205] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ce01adef70 [ 31.269054] R13: 00007ffd12c14d80 R14: 00007ffd12c14db0 R15: 00007ffd12c15110 [ 31.269926] [ 31.270226] [ 31.270440] Allocated by task 214: [ 31.270880] kasan_save_stack+0x22/0x50 [ 31.271414] kasan_set_track+0x25/0x30 [ 31.271926] __kasan_slab_alloc+0x59/0x70 [ 31.272472] kmem_cache_alloc+0x16b/0x370 [ 31.273021] vm_area_dup+0x20/0x160 [ 31.273497] __split_vma+0x170/0x950 [ 31.273987] split_vma+0xc6/0x110 [ 31.274465] mprotect_fixup+0x8d2/0xb30 [ 31.274996] do_mprotect_pkey+0x87e/0xd40 [ 31.275537] __x64_sys_mprotect+0x78/0xc0 [ 31.276089] do_syscall_64+0x3f/0x90 [ 31.276584] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.277268] [ 31.277491] Freed by task 19: [ 31.277890] kasan_save_stack+0x22/0x50 [ 31.278425] kasan_set_track+0x25/0x30 [ 31.278933] kasan_save_free_info+0x2b/0x50 [ 31.279515] __kasan_slab_free+0x10a/0x190 [ 31.280069] kmem_cache_free+0x10d/0x4d0 [ 31.280604] rcu_core+0x8c8/0x2860 [ 31.281077] __do_softirq+0x1b7/0x7d4 [ 31.281580] [ 31.281808] Last potentially related work creation: [ 31.282441] kasan_save_stack+0x22/0x50 [ 31.282974] __kasan_record_aux_stack+0x8e/0xa0 [ 31.283574] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.284251] remove_vma+0x139/0x170 [ 31.284731] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.285315] do_vmi_munmap+0x1f1/0x2b0 [ 31.285828] __vm_munmap+0x138/0x3a0 [ 31.286338] __x64_sys_munmap+0x59/0x80 [ 31.286862] do_syscall_64+0x3f/0x90 [ 31.287359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.288033] [ 31.288259] The buggy address belongs to the object at ffff88800c967488 [ 31.288259] which belongs to the cache vm_area_struct of size 168 [ 31.289805] The buggy address is located 88 bytes inside of [ 31.289805] freed 168-byte region [ffff88800c967488, ffff88800c967530) [ 31.291306] [ 31.291533] The buggy address belongs to the physical page: [ 31.292224] page:00000000e0c84f4e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc967 [ 31.293383] memcg:ffff8880169b3301 [ 31.293831] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.294537] page_type: 0xffffffff() [ 31.295010] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.295971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880169b3301 [ 31.296926] page dumped because: kasan: bad access detected [ 31.297619] [ 31.297844] Memory state around the buggy address: [ 31.298469] ffff88800c967380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.299369] ffff88800c967400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.300272] >ffff88800c967480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.301171] ^ [ 31.301955] ffff88800c967500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.302872] ffff88800c967580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.303769] ================================================================== [ 31.304758] Disabling lock debugging due to kernel taint [ 33.285250] BUG: Bad rss-counter state mm:00000000420330bb type:MM_FILEPAGES val:33 [ 33.286472] BUG: Bad rss-counter state mm:00000000420330bb type:MM_ANONPAGES val:22 [ 33.688050] BUG: Bad rss-counter state mm:00000000ac1adeb7 type:MM_FILEPAGES val:33 [ 33.689300] BUG: Bad rss-counter state mm:00000000ac1adeb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22562' (ECDSA) to the list of known hosts. 2023/06/20 16:00:50 fuzzer started 2023/06/20 16:00:51 dialing manager at localhost:36067 2023/06/20 16:00:51 checking machine... 2023/06/20 16:00:51 checking revisions... [ 34.419848] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:00:51 testing simple program... [ 34.472236] cgroup: Unknown subsys name 'net' [ 34.521486] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:00:50 Registers: info registers vcpu 0 RAX=ffff88800cf9c9a0 RBX=ffff88800eddaa00 RCX=0000000000000009 RDX=0000000000000600 RSI=ffff88800cf9c980 RDI=ffff8880087b8780 RBP=ffff88806ce09e38 RSP=ffff88806ce09e10 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=ffff8880087b8780 R13=ffffea00003b7680 R14=ffffffff8186b835 R15=ffff88800db7c800 RIP=ffffffff81809df3 RFL=00000212 [----A--] 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 00007f2ac69a2900 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=00007ffebe0ae000 CR3=000000000edaa000 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=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=00007f053a1587d0 CR3=000000000dd00000 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=2030353a30303a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a30303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000