syzkaller login: [ 27.265607] BUG: Bad rss-counter state mm:0000000075dcb62b type:MM_FILEPAGES val:33 [ 27.267047] BUG: Bad rss-counter state mm:0000000075dcb62b type:MM_ANONPAGES val:22 [ 27.413267] ================================================================== [ 27.414192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 27.415160] Read of size 8 at addr ffff8880145b5228 by task sshd/219 [ 27.415950] [ 27.416174] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 27.417234] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 27.418246] Call Trace: [ 27.418600] [ 27.418912] dump_stack_lvl+0x91/0xf0 [ 27.419415] print_report+0xcc/0x620 [ 27.419917] ? __virt_addr_valid+0x102/0x340 [ 27.420489] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.421120] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.421754] kasan_report+0xbe/0xf0 [ 27.422233] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.422881] vma_interval_tree_remove+0xc75/0xec0 [ 27.423482] vma_prepare+0xc54/0x11a0 [ 27.423962] __split_vma+0x5af/0x950 [ 27.424432] ? __pfx___split_vma+0x10/0x10 [ 27.424976] ? find_held_lock+0x2c/0x110 [ 27.425499] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.426063] ? lock_is_held_type+0x9f/0x120 [ 27.426621] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.427222] ? mtree_range_walk+0x632/0x900 [ 27.427774] ? mas_walk+0x5c7/0x7c0 [ 27.428249] do_vmi_munmap+0x1f1/0x2b0 [ 27.428753] mmap_region+0x1f9/0x2660 [ 27.429234] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.429751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.430482] ? __pfx_lock_acquire+0x10/0x10 [ 27.431015] ? __pfx_mmap_region+0x10/0x10 [ 27.431562] ? security_mmap_addr+0x7d/0xa0 [ 27.432090] ? get_unmapped_area+0x1f5/0x3f0 [ 27.432646] do_mmap+0x854/0xf00 [ 27.433085] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.433584] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.434154] ksys_mmap_pgoff+0x3af/0x500 [ 27.434676] do_syscall_64+0x3f/0x90 [ 27.435156] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.435811] RIP: 0033:0x7ff8f3063d82 [ 27.436268] 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 [ 27.438437] RSP: 002b:00007ffdcc7779d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.439346] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff8f3063d82 [ 27.440208] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff8f249d000 [ 27.441068] RBP: 00007ff8f249d000 R08: 0000000000000009 R09: 0000000000001000 [ 27.441924] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556c69a1ff70 [ 27.442796] R13: 00007ffdcc7779f0 R14: 00007ffdcc777a20 R15: 00007ffdcc777d80 [ 27.443667] [ 27.443963] [ 27.444185] Allocated by task 212: [ 27.444621] kasan_save_stack+0x22/0x50 [ 27.445125] kasan_set_track+0x25/0x30 [ 27.445622] __kasan_slab_alloc+0x59/0x70 [ 27.446157] kmem_cache_alloc+0x16b/0x370 [ 27.446791] vm_area_dup+0x20/0x160 [ 27.447257] __split_vma+0x170/0x950 [ 27.447738] split_vma+0xc6/0x110 [ 27.448193] mprotect_fixup+0x8d2/0xb30 [ 27.448703] do_mprotect_pkey+0x87e/0xd40 [ 27.449226] __x64_sys_mprotect+0x78/0xc0 [ 27.449749] do_syscall_64+0x3f/0x90 [ 27.450228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.450890] [ 27.451106] Freed by task 13: [ 27.451494] kasan_save_stack+0x22/0x50 [ 27.452006] kasan_set_track+0x25/0x30 [ 27.452498] kasan_save_free_info+0x2b/0x50 [ 27.453037] __kasan_slab_free+0x10a/0x190 [ 27.453575] kmem_cache_free+0x10d/0x4d0 [ 27.454084] rcu_core+0x8c8/0x2860 [ 27.454551] __do_softirq+0x1b7/0x7d4 [ 27.455027] [ 27.455244] Last potentially related work creation: [ 27.455839] kasan_save_stack+0x22/0x50 [ 27.456345] __kasan_record_aux_stack+0x8e/0xa0 [ 27.456920] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.457567] remove_vma+0x139/0x170 [ 27.458019] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.458589] do_vmi_munmap+0x1f1/0x2b0 [ 27.459078] __vm_munmap+0x138/0x3a0 [ 27.459550] __x64_sys_munmap+0x59/0x80 [ 27.460054] do_syscall_64+0x3f/0x90 [ 27.460525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.461166] [ 27.461378] The buggy address belongs to the object at ffff8880145b51d0 [ 27.461378] which belongs to the cache vm_area_struct of size 168 [ 27.462830] The buggy address is located 88 bytes inside of [ 27.462830] freed 168-byte region [ffff8880145b51d0, ffff8880145b5278) [ 27.464229] [ 27.464442] The buggy address belongs to the physical page: [ 27.465102] page:0000000005207345 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145b5 [ 27.466184] memcg:ffff888016d2cf01 [ 27.466626] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.467259] page_type: 0xffffffff() [ 27.467712] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.468614] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016d2cf01 [ 27.469522] page dumped because: kasan: bad access detected [ 27.470175] [ 27.470395] Memory state around the buggy address: [ 27.470970] ffff8880145b5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.471832] ffff8880145b5180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 27.472682] >ffff8880145b5200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 27.473532] ^ [ 27.474093] ffff8880145b5280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 27.474959] ffff8880145b5300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 27.475813] ================================================================== [ 27.477061] Disabling lock debugging due to kernel taint [ 30.024071] BUG: Bad rss-counter state mm:000000003d68586a type:MM_FILEPAGES val:33 [ 30.025241] BUG: Bad rss-counter state mm:000000003d68586a type:MM_ANONPAGES val:22 [ 30.431268] BUG: Bad rss-counter state mm:0000000051f2746a type:MM_FILEPAGES val:33 [ 30.432279] BUG: Bad rss-counter state mm:0000000051f2746a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9428' (ECDSA) to the list of known hosts. 2023/06/19 16:58:10 fuzzer started 2023/06/19 16:58:10 dialing manager at localhost:44161 2023/06/19 16:58:11 checking machine... 2023/06/19 16:58:11 checking revisions... [ 31.156098] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:58:11 testing simple program... [ 31.196863] cgroup: Unknown subsys name 'net' [ 31.235215] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:58:07 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff818a9100 RDX=ffff88800f65b680 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888016c77b08 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000001 R12=ffff888016c77c48 R13=dffffc0000000000 R14=0000000000008000 R15=ffff888016c77df0 RIP=ffffffff814c01e1 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 00007f9495fb8900 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=00007f949656d650 CR3=000000000e0f6000 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=2030313a38353a3631203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a38353a3631203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888014727808 RBX=0000000000000001 RCX=ffffffff864bb02e RDX=dffffc0000000000 RSI=1ffff1100d9e135e RDI=ffff8880147277f0 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864bb032 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b6cb2 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff888014727758 R15=ffff88806cf09a98 RIP=ffffffff811317ef 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f31ea627900 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=00007f31e9ab0430 CR3=000000000973e000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=79f88c098205b8e200000000000ae988 XMM05=bf3d30ff027a85f80000000000134790 XMM06=3923b1bc0b82afdf00000000001334c8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000