syzkaller login: [ 74.970016] BUG: Bad rss-counter state mm:00000000f473a671 type:MM_FILEPAGES val:33 [ 74.971046] BUG: Bad rss-counter state mm:00000000f473a671 type:MM_ANONPAGES val:22 [ 75.143912] ================================================================== [ 75.144866] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 75.146020] Read of size 8 at addr ffff88800e2c0310 by task sshd/221 [ 75.146792] [ 75.147036] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 75.147901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 75.148877] Call Trace: [ 75.149196] [ 75.149486] dump_stack_lvl+0x91/0xf0 [ 75.149982] print_report+0xcc/0x620 [ 75.150461] ? __virt_addr_valid+0x102/0x340 [ 75.151135] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.151977] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.152670] kasan_report+0xbe/0xf0 [ 75.153161] ? vma_interval_tree_remove+0xc75/0xec0 [ 75.153831] vma_interval_tree_remove+0xc75/0xec0 [ 75.154461] vma_prepare+0xc54/0x11a0 [ 75.154981] __split_vma+0x5af/0x950 [ 75.155494] ? __pfx___split_vma+0x10/0x10 [ 75.156142] ? find_held_lock+0x2c/0x110 [ 75.156735] do_vmi_align_munmap+0x2ba/0x11f0 [ 75.157329] ? lock_is_held_type+0x9f/0x120 [ 75.157901] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 75.158554] ? mtree_range_walk+0x632/0x900 [ 75.159157] ? mas_walk+0x5c7/0x7c0 [ 75.159670] do_vmi_munmap+0x1f1/0x2b0 [ 75.160198] mmap_region+0x1f9/0x2660 [ 75.160747] ? vm_mmap_pgoff+0x15c/0x3a0 [ 75.161283] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 75.162040] ? __pfx_lock_acquire+0x10/0x10 [ 75.162632] ? __pfx_mmap_region+0x10/0x10 [ 75.163216] ? security_mmap_addr+0x7d/0xa0 [ 75.163794] ? get_unmapped_area+0x1f5/0x3f0 [ 75.164374] do_mmap+0x854/0xf00 [ 75.164844] vm_mmap_pgoff+0x1a6/0x3a0 [ 75.165361] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 75.165960] ksys_mmap_pgoff+0x3af/0x500 [ 75.166490] do_syscall_64+0x3f/0x90 [ 75.167031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.167946] RIP: 0033:0x7fe5b89e4d82 [ 75.168598] 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 [ 75.171662] RSP: 002b:00007ffca54eaeb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 75.172951] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5b89e4d82 [ 75.174172] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5b7e1e000 [ 75.175406] RBP: 00007fe5b7e1e000 R08: 0000000000000009 R09: 0000000000001000 [ 75.176608] R10: 0000000000000812 R11: 0000000000000206 R12: 000055db835c2ec0 [ 75.177812] R13: 00007ffca54eaed0 R14: 00007ffca54eaf00 R15: 00007ffca54eb260 [ 75.179063] [ 75.179489] [ 75.179796] Allocated by task 214: [ 75.180417] kasan_save_stack+0x22/0x50 [ 75.181145] kasan_set_track+0x25/0x30 [ 75.181857] __kasan_slab_alloc+0x59/0x70 [ 75.182600] kmem_cache_alloc+0x16b/0x370 [ 75.183336] vm_area_dup+0x20/0x160 [ 75.183978] __split_vma+0x170/0x950 [ 75.184636] split_vma+0xc6/0x110 [ 75.185263] mprotect_fixup+0x8d2/0xb30 [ 75.185976] do_mprotect_pkey+0x87e/0xd40 [ 75.186716] __x64_sys_mprotect+0x78/0xc0 [ 75.187545] do_syscall_64+0x3f/0x90 [ 75.188226] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.189140] [ 75.189439] Freed by task 214: [ 75.190004] kasan_save_stack+0x22/0x50 [ 75.190725] kasan_set_track+0x25/0x30 [ 75.191446] kasan_save_free_info+0x2b/0x50 [ 75.192206] __kasan_slab_free+0x10a/0x190 [ 75.192969] kmem_cache_free+0x10d/0x4d0 [ 75.193695] rcu_core+0x8c8/0x2860 [ 75.194340] __do_softirq+0x1b7/0x7d4 [ 75.195029] [ 75.195345] Last potentially related work creation: [ 75.196186] kasan_save_stack+0x22/0x50 [ 75.196910] __kasan_record_aux_stack+0x8e/0xa0 [ 75.197729] __call_rcu_common.constprop.0+0x6a/0xb90 [ 75.198640] remove_vma+0x139/0x170 [ 75.199307] do_vmi_align_munmap+0xd4a/0x11f0 [ 75.200095] do_vmi_munmap+0x1f1/0x2b0 [ 75.200780] __vm_munmap+0x138/0x3a0 [ 75.201444] __x64_sys_munmap+0x59/0x80 [ 75.202144] do_syscall_64+0x3f/0x90 [ 75.202783] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 75.203695] [ 75.204012] The buggy address belongs to the object at ffff88800e2c02b8 [ 75.204012] which belongs to the cache vm_area_struct of size 168 [ 75.206074] The buggy address is located 88 bytes inside of [ 75.206074] freed 168-byte region [ffff88800e2c02b8, ffff88800e2c0360) [ 75.208092] [ 75.208401] The buggy address belongs to the physical page: [ 75.209346] page:00000000921ed8fb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2c0 [ 75.210887] memcg:ffff88800e62c501 [ 75.211493] flags: 0x100000000000200(slab|node=0|zone=1) [ 75.212398] page_type: 0xffffffff() [ 75.213030] raw: 0100000000000200 ffff88800879fc80 ffffea0000399dc0 dead000000000002 [ 75.214335] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e62c501 [ 75.215644] page dumped because: kasan: bad access detected [ 75.216592] [ 75.216898] Memory state around the buggy address: [ 75.217727] ffff88800e2c0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 75.218950] ffff88800e2c0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 75.220192] >ffff88800e2c0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 75.221399] ^ [ 75.222064] ffff88800e2c0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 75.223304] ffff88800e2c0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 75.224518] ================================================================== [ 75.225890] Disabling lock debugging due to kernel taint [ 77.884780] BUG: Bad rss-counter state mm:0000000039f0f827 type:MM_FILEPAGES val:33 [ 77.885780] BUG: Bad rss-counter state mm:0000000039f0f827 type:MM_ANONPAGES val:22 [ 78.349791] BUG: Bad rss-counter state mm:00000000e47a7d37 type:MM_FILEPAGES val:33 [ 78.350794] BUG: Bad rss-counter state mm:00000000e47a7d37 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29440' (ECDSA) to the list of known hosts. 2023/06/20 07:28:23 fuzzer started 2023/06/20 07:28:24 dialing manager at localhost:44161 2023/06/20 07:28:24 checking machine... 2023/06/20 07:28:24 checking revisions... [ 79.078996] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:28:24 testing simple program... [ 79.128198] cgroup: Unknown subsys name 'net' [ 79.165911] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:28:09 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=00007ffeafb3fe58 CR3=0000000019fd4000 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=2033323a38323a3730203032206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a38323a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000003 RCX=ffffffff81143201 RDX=0000000000000800 RSI=0000000000000000 RDI=0000000000000006 RBP=0000000019ea2220 RSP=ffff8880167c7ca0 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000800 R11=0000000000000000 R12=0000000000000000 R13=0000000000000800 R14=0000000000000000 R15=ffffffff85d3ce80 RIP=ffffffff814c01d0 RFL=00000293 [--S-A-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 00007f748c637900 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=00007f748cbef0b0 CR3=000000001bebe000 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=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