syzkaller login: [ 178.170349] BUG: Bad rss-counter state mm:0000000070a4c069 type:MM_FILEPAGES val:33 [ 178.171405] BUG: Bad rss-counter state mm:0000000070a4c069 type:MM_ANONPAGES val:22 [ 178.209699] ================================================================== [ 178.210644] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 178.211600] Read of size 8 at addr ffff88800ec69968 by task sshd/221 [ 178.212369] [ 178.212588] CPU: 0 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 178.213617] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 178.214586] Call Trace: [ 178.214906] <TASK> [ 178.215211] dump_stack_lvl+0x91/0xf0 [ 178.215703] print_report+0xcc/0x620 [ 178.216187] ? __virt_addr_valid+0x102/0x340 [ 178.216739] ? vma_interval_tree_remove+0xc75/0xec0 [ 178.217349] ? vma_interval_tree_remove+0xc75/0xec0 [ 178.217958] kasan_report+0xbe/0xf0 [ 178.218435] ? vma_interval_tree_remove+0xc75/0xec0 [ 178.219056] vma_interval_tree_remove+0xc75/0xec0 [ 178.219670] vma_prepare+0xc54/0x11a0 [ 178.220151] __split_vma+0x5af/0x950 [ 178.220625] ? __pfx___split_vma+0x10/0x10 [ 178.221152] ? find_held_lock+0x2c/0x110 [ 178.221671] do_vmi_align_munmap+0x2ba/0x11f0 [ 178.222246] ? lock_is_held_type+0x9f/0x120 [ 178.222782] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 178.223395] ? mtree_range_walk+0x632/0x900 [ 178.223944] ? mas_walk+0x5c7/0x7c0 [ 178.224415] do_vmi_munmap+0x1f1/0x2b0 [ 178.224906] mmap_region+0x1f9/0x2660 [ 178.225388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 178.225900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 178.226610] ? __pfx_lock_acquire+0x10/0x10 [ 178.227168] ? __pfx_mmap_region+0x10/0x10 [ 178.227698] ? security_mmap_addr+0x7d/0xa0 [ 178.228227] ? get_unmapped_area+0x1f5/0x3f0 [ 178.228778] do_mmap+0x854/0xf00 [ 178.229217] vm_mmap_pgoff+0x1a6/0x3a0 [ 178.229708] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 178.230270] ksys_mmap_pgoff+0x3af/0x500 [ 178.230775] do_syscall_64+0x3f/0x90 [ 178.231266] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 178.231914] RIP: 0033:0x7fc3f5ae0d82 [ 178.232374] 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 [ 178.234517] RSP: 002b:00007ffe38367258 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 178.235429] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc3f5ae0d82 [ 178.236292] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc3f4f1a000 [ 178.237220] RBP: 00007fc3f4f1a000 R08: 0000000000000009 R09: 0000000000001000 [ 178.238074] R10: 0000000000000812 R11: 0000000000000206 R12: 00005569717a4ec0 [ 178.238943] R13: 00007ffe38367270 R14: 00007ffe383672a0 R15: 00007ffe38367600 [ 178.239814] </TASK> [ 178.240107] [ 178.240318] Allocated by task 214: [ 178.240756] kasan_save_stack+0x22/0x50 [ 178.241260] kasan_set_track+0x25/0x30 [ 178.241757] __kasan_slab_alloc+0x59/0x70 [ 178.242282] kmem_cache_alloc+0x16b/0x370 [ 178.242804] vm_area_dup+0x20/0x160 [ 178.243273] __split_vma+0x170/0x950 [ 178.243744] split_vma+0xc6/0x110 [ 178.244182] mprotect_fixup+0x8d2/0xb30 [ 178.244687] do_mprotect_pkey+0x87e/0xd40 [ 178.245223] __x64_sys_mprotect+0x78/0xc0 [ 178.245757] do_syscall_64+0x3f/0x90 [ 178.246241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 178.246887] [ 178.247122] Freed by task 214: [ 178.247527] kasan_save_stack+0x22/0x50 [ 178.248029] kasan_set_track+0x25/0x30 [ 178.248532] kasan_save_free_info+0x2b/0x50 [ 178.249067] __kasan_slab_free+0x10a/0x190 [ 178.249609] kmem_cache_free+0x10d/0x4d0 [ 178.250120] rcu_core+0x8c8/0x2860 [ 178.250567] __do_softirq+0x1b7/0x7d4 [ 178.251042] [ 178.251265] Last potentially related work creation: [ 178.251864] kasan_save_stack+0x22/0x50 [ 178.252368] __kasan_record_aux_stack+0x8e/0xa0 [ 178.252950] __call_rcu_common.constprop.0+0x6a/0xb90 [ 178.253600] remove_vma+0x139/0x170 [ 178.254063] do_vmi_align_munmap+0xd4a/0x11f0 [ 178.254624] do_vmi_munmap+0x1f1/0x2b0 [ 178.255119] __vm_munmap+0x138/0x3a0 [ 178.255584] __x64_sys_munmap+0x59/0x80 [ 178.256095] do_syscall_64+0x3f/0x90 [ 178.256564] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 178.257210] [ 178.257427] The buggy address belongs to the object at ffff88800ec69910 [ 178.257427] which belongs to the cache vm_area_struct of size 168 [ 178.258905] The buggy address is located 88 bytes inside of [ 178.258905] freed 168-byte region [ffff88800ec69910, ffff88800ec699b8) [ 178.260354] [ 178.260572] The buggy address belongs to the physical page: [ 178.261230] page:00000000c506abca refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec69 [ 178.262308] memcg:ffff88800eb34f01 [ 178.262739] flags: 0x100000000000200(slab|node=0|zone=1) [ 178.263402] page_type: 0xffffffff() [ 178.263856] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 178.264782] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb34f01 [ 178.265705] page dumped because: kasan: bad access detected [ 178.266378] [ 178.266595] Memory state around the buggy address: [ 178.267184] ffff88800ec69800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 178.268054] ffff88800ec69880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 178.268906] >ffff88800ec69900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 178.269760] ^ [ 178.270546] ffff88800ec69980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 178.271408] ffff88800ec69a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 178.272265] ================================================================== [ 178.273332] Disabling lock debugging due to kernel taint [ 180.117510] BUG: Bad rss-counter state mm:00000000b557ae4d type:MM_FILEPAGES val:33 [ 180.118510] BUG: Bad rss-counter state mm:00000000b557ae4d type:MM_ANONPAGES val:22 [ 180.532413] BUG: Bad rss-counter state mm:00000000deb70d3a type:MM_FILEPAGES val:33 [ 180.533673] BUG: Bad rss-counter state mm:00000000deb70d3a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30209' (ECDSA) to the list of known hosts. 2023/06/19 23:05:34 fuzzer started 2023/06/19 23:05:34 dialing manager at localhost:44161 2023/06/19 23:05:34 checking machine... 2023/06/19 23:05:34 checking revisions... [ 181.246107] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:05:34 testing simple program... [ 181.290962] cgroup: Unknown subsys name 'net' [ 181.329807] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:07 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=1ffff11001e4ce66 RDX=dffffc0000000000 RSI=ffffffff83638916 RDI=ffff88800f2672d8 RBP=ffff88800f267330 RSP=ffff88800f267268 R8 =0000000000000001 R9 =ffff88800f267318 R10=0000000000038001 R11=000000000008a842 R12=ffff88800f267338 R13=ffff88800f267320 R14=ffff88800f267319 R15=ffff88800f2672d8 RIP=ffffffff81130706 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 00007f43999b8900 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=00007ffd48537000 CR3=0000000016b4a000 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=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=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 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=00007ffcfff20f78 CR3=000000000a6de000 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=2034333a35303a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a35303a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000