syzkaller login: [ 30.570164] BUG: Bad rss-counter state mm:000000005c632bd4 type:MM_FILEPAGES val:33 [ 30.571786] BUG: Bad rss-counter state mm:000000005c632bd4 type:MM_ANONPAGES val:22 [ 30.743371] ================================================================== [ 30.744273] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.745204] Read of size 8 at addr ffff88800e344058 by task sshd/220 [ 30.745985] [ 30.746203] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.747170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.748146] Call Trace: [ 30.748465] [ 30.748761] dump_stack_lvl+0x91/0xf0 [ 30.749250] print_report+0xcc/0x620 [ 30.749744] ? __virt_addr_valid+0x102/0x340 [ 30.750295] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.750917] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.751533] kasan_report+0xbe/0xf0 [ 30.752008] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.752631] vma_interval_tree_remove+0xc75/0xec0 [ 30.753229] vma_prepare+0xc54/0x11a0 [ 30.753724] __split_vma+0x5af/0x950 [ 30.754199] ? __pfx___split_vma+0x10/0x10 [ 30.754737] ? find_held_lock+0x2c/0x110 [ 30.755261] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.755830] ? lock_is_held_type+0x9f/0x120 [ 30.756371] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.756982] ? mtree_range_walk+0x632/0x900 [ 30.757552] ? mas_walk+0x5c7/0x7c0 [ 30.758031] do_vmi_munmap+0x1f1/0x2b0 [ 30.758520] mmap_region+0x1f9/0x2660 [ 30.759010] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.759523] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.760238] ? __pfx_lock_acquire+0x10/0x10 [ 30.760772] ? __pfx_mmap_region+0x10/0x10 [ 30.761314] ? security_mmap_addr+0x7d/0xa0 [ 30.761844] ? get_unmapped_area+0x1f5/0x3f0 [ 30.762402] do_mmap+0x854/0xf00 [ 30.762843] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.763337] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.763898] ksys_mmap_pgoff+0x3af/0x500 [ 30.764403] do_syscall_64+0x3f/0x90 [ 30.764883] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.765531] RIP: 0033:0x7f31f8fd3d82 [ 30.766012] 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 [ 30.768142] RSP: 002b:00007fff56e07428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.769046] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f31f8fd3d82 [ 30.769917] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f31f840d000 [ 30.770936] RBP: 00007f31f840d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.771964] R10: 0000000000000812 R11: 0000000000000206 R12: 00005647412d3f70 [ 30.773007] R13: 00007fff56e07440 R14: 00007fff56e07470 R15: 00007fff56e077d0 [ 30.774109] [ 30.774471] [ 30.774734] Allocated by task 213: [ 30.775265] kasan_save_stack+0x22/0x50 [ 30.775875] kasan_set_track+0x25/0x30 [ 30.776478] __kasan_slab_alloc+0x59/0x70 [ 30.777117] kmem_cache_alloc+0x16b/0x370 [ 30.777771] vm_area_dup+0x20/0x160 [ 30.778334] __split_vma+0x170/0x950 [ 30.778906] split_vma+0xc6/0x110 [ 30.779451] mprotect_fixup+0x8d2/0xb30 [ 30.780053] do_mprotect_pkey+0x87e/0xd40 [ 30.780685] __x64_sys_mprotect+0x78/0xc0 [ 30.781326] do_syscall_64+0x3f/0x90 [ 30.781910] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.782703] [ 30.782967] Freed by task 213: [ 30.783451] kasan_save_stack+0x22/0x50 [ 30.784058] kasan_set_track+0x25/0x30 [ 30.784660] kasan_save_free_info+0x2b/0x50 [ 30.785320] __kasan_slab_free+0x10a/0x190 [ 30.785958] kmem_cache_free+0x10d/0x4d0 [ 30.786580] rcu_core+0x8c8/0x2860 [ 30.787123] __do_softirq+0x1b7/0x7d4 [ 30.787700] [ 30.787961] Last potentially related work creation: [ 30.788673] kasan_save_stack+0x22/0x50 [ 30.789298] __kasan_record_aux_stack+0x8e/0xa0 [ 30.789996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.790768] remove_vma+0x139/0x170 [ 30.791319] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.792002] do_vmi_munmap+0x1f1/0x2b0 [ 30.792589] __vm_munmap+0x138/0x3a0 [ 30.793149] __x64_sys_munmap+0x59/0x80 [ 30.793772] do_syscall_64+0x3f/0x90 [ 30.794351] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.795137] [ 30.795398] Second to last potentially related work creation: [ 30.796234] kasan_save_stack+0x22/0x50 [ 30.796839] __kasan_record_aux_stack+0x8e/0xa0 [ 30.797560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.798350] remove_vma+0x139/0x170 [ 30.798900] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.799576] do_vmi_munmap+0x1f1/0x2b0 [ 30.800166] mmap_region+0x1f9/0x2660 [ 30.800749] do_mmap+0x854/0xf00 [ 30.801299] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.801886] ksys_mmap_pgoff+0x3af/0x500 [ 30.802499] do_syscall_64+0x3f/0x90 [ 30.803085] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.803863] [ 30.804129] The buggy address belongs to the object at ffff88800e344000 [ 30.804129] which belongs to the cache vm_area_struct of size 168 [ 30.805956] The buggy address is located 88 bytes inside of [ 30.805956] freed 168-byte region [ffff88800e344000, ffff88800e3440a8) [ 30.807685] [ 30.807937] The buggy address belongs to the physical page: [ 30.808736] page:000000003c862fe6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe344 [ 30.810061] memcg:ffff88800ea30101 [ 30.810577] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.811355] page_type: 0xffffffff() [ 30.811897] raw: 0100000000000200 ffff8880087a0c80 ffffea0000368d80 dead00000000000a [ 30.813012] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea30101 [ 30.813900] page dumped because: kasan: bad access detected [ 30.814526] [ 30.814733] Memory state around the buggy address: [ 30.815288] ffff88800e343f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 30.816089] ffff88800e343f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.816893] >ffff88800e344000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.817710] ^ [ 30.818394] ffff88800e344080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 30.819202] ffff88800e344100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.820002] ================================================================== [ 30.820928] Disabling lock debugging due to kernel taint [ 32.683780] BUG: Bad rss-counter state mm:0000000090101265 type:MM_FILEPAGES val:33 [ 32.684825] BUG: Bad rss-counter state mm:0000000090101265 type:MM_ANONPAGES val:22 [ 33.143390] BUG: Bad rss-counter state mm:00000000fb9778d7 type:MM_FILEPAGES val:33 [ 33.144357] BUG: Bad rss-counter state mm:00000000fb9778d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24442' (ECDSA) to the list of known hosts. 2023/06/21 04:08:20 fuzzer started 2023/06/21 04:08:20 dialing manager at localhost:36067 2023/06/21 04:08:20 checking machine... 2023/06/21 04:08:20 checking revisions... [ 33.869100] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:08:20 testing simple program... [ 33.915516] cgroup: Unknown subsys name 'net' [ 33.980991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:08:20 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800e61c4c0 RCX=0000000000000000 RDX=1ffff11001cc3898 RSI=ffffffff8164ce06 RDI=0000000000000005 RBP=0000607f92e164f8 RSP=ffff888017dffa50 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=ffff8880164ef800 R14=ffff88800e61c000 R15=ffff888015c3d1c0 RIP=ffffffff8164ce24 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 00007f2d89efd700 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=00007fe5d184ebc0 CR3=000000000e7e6000 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=2039313a38303a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a38303a3430203132 XMM08=69767265733d7373616c63742030733a 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=00007fb55a48c0b0 CR3=000000000e66c000 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=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