syzkaller login: [ 81.944037] BUG: Bad rss-counter state mm:00000000b7ad8d9c type:MM_FILEPAGES val:33 [ 81.945744] BUG: Bad rss-counter state mm:00000000b7ad8d9c type:MM_ANONPAGES val:22 [ 82.109266] ================================================================== [ 82.110199] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 82.111140] Read of size 8 at addr ffff888017d7cc20 by task sshd/218 [ 82.111912] [ 82.112241] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 82.113290] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 82.114283] Call Trace: [ 82.114604] [ 82.114890] dump_stack_lvl+0x91/0xf0 [ 82.115379] print_report+0xcc/0x620 [ 82.115866] ? __virt_addr_valid+0x102/0x340 [ 82.116419] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.117077] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.117710] kasan_report+0xbe/0xf0 [ 82.118195] ? vma_interval_tree_remove+0xc75/0xec0 [ 82.118829] vma_interval_tree_remove+0xc75/0xec0 [ 82.119440] vma_prepare+0xc54/0x11a0 [ 82.119919] __split_vma+0x5af/0x950 [ 82.120400] ? __pfx___split_vma+0x10/0x10 [ 82.120947] ? find_held_lock+0x2c/0x110 [ 82.121477] do_vmi_align_munmap+0x2ba/0x11f0 [ 82.122050] ? lock_is_held_type+0x9f/0x120 [ 82.122588] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 82.123200] ? mtree_range_walk+0x632/0x900 [ 82.123760] ? mas_walk+0x5c7/0x7c0 [ 82.124229] do_vmi_munmap+0x1f1/0x2b0 [ 82.124742] mmap_region+0x1f9/0x2660 [ 82.125252] ? vm_mmap_pgoff+0x15c/0x3a0 [ 82.125815] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 82.126559] ? __pfx_lock_acquire+0x10/0x10 [ 82.127113] ? __pfx_mmap_region+0x10/0x10 [ 82.127654] ? security_mmap_addr+0x7d/0xa0 [ 82.128188] ? get_unmapped_area+0x1f5/0x3f0 [ 82.128768] do_mmap+0x854/0xf00 [ 82.129214] vm_mmap_pgoff+0x1a6/0x3a0 [ 82.129721] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 82.130297] ksys_mmap_pgoff+0x3af/0x500 [ 82.130812] do_syscall_64+0x3f/0x90 [ 82.131292] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.131960] RIP: 0033:0x7f38b60a3d82 [ 82.132430] 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 [ 82.134609] RSP: 002b:00007ffeeddeaf58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 82.135529] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38b60a3d82 [ 82.136388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38b54dd000 [ 82.137253] RBP: 00007f38b54dd000 R08: 0000000000000009 R09: 0000000000001000 [ 82.138108] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558cb1c44ec0 [ 82.138961] R13: 00007ffeeddeaf70 R14: 00007ffeeddeafa0 R15: 00007ffeeddeb300 [ 82.139827] [ 82.140126] [ 82.140350] Allocated by task 211: [ 82.140793] kasan_save_stack+0x22/0x50 [ 82.141309] kasan_set_track+0x25/0x30 [ 82.141807] __kasan_slab_alloc+0x59/0x70 [ 82.142345] kmem_cache_alloc+0x16b/0x370 [ 82.142869] vm_area_dup+0x20/0x160 [ 82.143335] __split_vma+0x170/0x950 [ 82.143811] split_vma+0xc6/0x110 [ 82.144259] mprotect_fixup+0x8d2/0xb30 [ 82.144786] do_mprotect_pkey+0x87e/0xd40 [ 82.145332] __x64_sys_mprotect+0x78/0xc0 [ 82.145892] do_syscall_64+0x3f/0x90 [ 82.146380] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.147030] [ 82.147258] Freed by task 211: [ 82.147649] kasan_save_stack+0x22/0x50 [ 82.148158] kasan_set_track+0x25/0x30 [ 82.148675] kasan_save_free_info+0x2b/0x50 [ 82.149217] __kasan_slab_free+0x10a/0x190 [ 82.149761] kmem_cache_free+0x10d/0x4d0 [ 82.150270] rcu_core+0x8c8/0x2860 [ 82.150725] __do_softirq+0x1b7/0x7d4 [ 82.151217] [ 82.151438] Last potentially related work creation: [ 82.152044] kasan_save_stack+0x22/0x50 [ 82.152550] __kasan_record_aux_stack+0x8e/0xa0 [ 82.153142] __call_rcu_common.constprop.0+0x6a/0xb90 [ 82.153809] remove_vma+0x139/0x170 [ 82.154273] do_vmi_align_munmap+0xd4a/0x11f0 [ 82.154843] do_vmi_munmap+0x1f1/0x2b0 [ 82.155343] __vm_munmap+0x138/0x3a0 [ 82.155827] __x64_sys_munmap+0x59/0x80 [ 82.156327] do_syscall_64+0x3f/0x90 [ 82.156818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 82.157467] [ 82.157688] The buggy address belongs to the object at ffff888017d7cbc8 [ 82.157688] which belongs to the cache vm_area_struct of size 168 [ 82.159157] The buggy address is located 88 bytes inside of [ 82.159157] freed 168-byte region [ffff888017d7cbc8, ffff888017d7cc70) [ 82.160554] [ 82.160794] The buggy address belongs to the physical page: [ 82.161486] page:00000000f7c73d60 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d7c [ 82.162615] memcg:ffff88801a0eea01 [ 82.163052] flags: 0x100000000000200(slab|node=0|zone=1) [ 82.163696] page_type: 0xffffffff() [ 82.164151] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 82.165086] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a0eea01 [ 82.165997] page dumped because: kasan: bad access detected [ 82.166669] [ 82.166893] Memory state around the buggy address: [ 82.167482] ffff888017d7cb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 82.168339] ffff888017d7cb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 82.169213] >ffff888017d7cc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 82.170085] ^ [ 82.170615] ffff888017d7cc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 82.171500] ffff888017d7cd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 82.172369] ================================================================== [ 82.173373] Disabling lock debugging due to kernel taint [ 84.001313] BUG: Bad rss-counter state mm:000000009843d6b5 type:MM_FILEPAGES val:33 [ 84.002688] BUG: Bad rss-counter state mm:000000009843d6b5 type:MM_ANONPAGES val:22 [ 84.441795] BUG: Bad rss-counter state mm:00000000d2d7d8f4 type:MM_FILEPAGES val:33 [ 84.442948] BUG: Bad rss-counter state mm:00000000d2d7d8f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:63358' (ECDSA) to the list of known hosts. 2023/06/20 05:57:47 fuzzer started 2023/06/20 05:57:48 dialing manager at localhost:44161 2023/06/20 05:57:48 checking machine... 2023/06/20 05:57:48 checking revisions... [ 85.180494] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:57:48 testing simple program... [ 85.227522] cgroup: Unknown subsys name 'net' [ 85.274292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:57:04 Registers: info registers vcpu 0 RAX=ffffffff8450b059 RBX=000000000000000a RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000017 RDI=ffff88806ce09af0 RBP=dffffc0000000000 RSP=ffff88806ce09a10 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000017 R13=0000000000000000 R14=ffff88806ce09aa0 R15=dffffc0000000000 RIP=ffffffff813ad5f9 RFL=00000083 [--S---C] 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 00007fe51762f900 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=00007fe517be70b0 CR3=0000000017db6000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffdb9e622a8 CR3=00000000145b0000 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=37353a3530203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3732325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363733 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000