syzkaller login: [ 30.507799] BUG: Bad rss-counter state mm:0000000029b7c945 type:MM_FILEPAGES val:33 [ 30.509190] BUG: Bad rss-counter state mm:0000000029b7c945 type:MM_ANONPAGES val:22 [ 30.656120] ================================================================== [ 30.657234] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.658349] Read of size 8 at addr ffff88801a05b6b0 by task sshd/221 [ 30.659334] [ 30.659546] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.660564] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.661493] Call Trace: [ 30.661796] [ 30.662067] dump_stack_lvl+0x91/0xf0 [ 30.662541] print_report+0xcc/0x620 [ 30.663002] ? __virt_addr_valid+0x102/0x340 [ 30.663522] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664105] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.664694] kasan_report+0xbe/0xf0 [ 30.665148] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.665738] vma_interval_tree_remove+0xc75/0xec0 [ 30.666311] vma_prepare+0xc54/0x11a0 [ 30.666772] __split_vma+0x5af/0x950 [ 30.667222] ? __pfx___split_vma+0x10/0x10 [ 30.667726] ? find_held_lock+0x2c/0x110 [ 30.668220] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.668793] ? lock_is_held_type+0x9f/0x120 [ 30.669333] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.669935] ? mtree_range_walk+0x632/0x900 [ 30.670483] ? mas_walk+0x5c7/0x7c0 [ 30.670962] do_vmi_munmap+0x1f1/0x2b0 [ 30.671452] mmap_region+0x1f9/0x2660 [ 30.671928] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.672462] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.673168] ? __pfx_lock_acquire+0x10/0x10 [ 30.673700] ? __pfx_mmap_region+0x10/0x10 [ 30.674230] ? security_mmap_addr+0x7d/0xa0 [ 30.674763] ? get_unmapped_area+0x1f5/0x3f0 [ 30.675301] do_mmap+0x854/0xf00 [ 30.675737] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.676219] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.676790] ksys_mmap_pgoff+0x3af/0x500 [ 30.677291] do_syscall_64+0x3f/0x90 [ 30.677777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.678412] RIP: 0033:0x7f535bb8fd82 [ 30.678863] 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 [ 30.680999] RSP: 002b:00007fff6ab3af08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.681902] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f535bb8fd82 [ 30.682752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f535afc9000 [ 30.683592] RBP: 00007f535afc9000 R08: 0000000000000009 R09: 0000000000001000 [ 30.684445] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ea4713eb20 [ 30.685293] R13: 00007fff6ab3af20 R14: 00007fff6ab3af50 R15: 00007fff6ab3b2b0 [ 30.686140] [ 30.686426] [ 30.686643] Allocated by task 214: [ 30.687068] kasan_save_stack+0x22/0x50 [ 30.687573] kasan_set_track+0x25/0x30 [ 30.688066] __kasan_slab_alloc+0x59/0x70 [ 30.688606] kmem_cache_alloc+0x16b/0x370 [ 30.689129] vm_area_dup+0x20/0x160 [ 30.689589] __split_vma+0x170/0x950 [ 30.690056] split_vma+0xc6/0x110 [ 30.690488] mprotect_fixup+0x8d2/0xb30 [ 30.690985] do_mprotect_pkey+0x87e/0xd40 [ 30.691505] __x64_sys_mprotect+0x78/0xc0 [ 30.692015] do_syscall_64+0x3f/0x90 [ 30.692506] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.693146] [ 30.693359] Freed by task 214: [ 30.693757] kasan_save_stack+0x22/0x50 [ 30.694252] kasan_set_track+0x25/0x30 [ 30.694747] kasan_save_free_info+0x2b/0x50 [ 30.695268] __kasan_slab_free+0x10a/0x190 [ 30.695803] kmem_cache_free+0x10d/0x4d0 [ 30.696321] rcu_core+0x8c8/0x2860 [ 30.696768] __do_softirq+0x1b7/0x7d4 [ 30.697241] [ 30.697447] Last potentially related work creation: [ 30.698026] kasan_save_stack+0x22/0x50 [ 30.698535] __kasan_record_aux_stack+0x8e/0xa0 [ 30.699103] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.699741] remove_vma+0x139/0x170 [ 30.700254] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.700831] do_vmi_munmap+0x1f1/0x2b0 [ 30.701313] __vm_munmap+0x138/0x3a0 [ 30.701778] __x64_sys_munmap+0x59/0x80 [ 30.702264] do_syscall_64+0x3f/0x90 [ 30.702739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.703377] [ 30.703597] The buggy address belongs to the object at ffff88801a05b658 [ 30.703597] which belongs to the cache vm_area_struct of size 168 [ 30.705051] The buggy address is located 88 bytes inside of [ 30.705051] freed 168-byte region [ffff88801a05b658, ffff88801a05b700) [ 30.706452] [ 30.706668] The buggy address belongs to the physical page: [ 30.707307] page:0000000072821f0a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a05b [ 30.708403] memcg:ffff88801591cc01 [ 30.708824] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.709465] page_type: 0xffffffff() [ 30.709915] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.710820] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801591cc01 [ 30.711717] page dumped because: kasan: bad access detected [ 30.712386] [ 30.712610] Memory state around the buggy address: [ 30.713185] ffff88801a05b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.714041] ffff88801a05b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.714888] >ffff88801a05b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.715728] ^ [ 30.716310] ffff88801a05b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.717169] ffff88801a05b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.718015] ================================================================== [ 30.719008] Disabling lock debugging due to kernel taint [ 32.878429] BUG: Bad rss-counter state mm:00000000e0e96af0 type:MM_FILEPAGES val:33 [ 32.879441] BUG: Bad rss-counter state mm:00000000e0e96af0 type:MM_ANONPAGES val:22 [ 33.406976] BUG: Bad rss-counter state mm:000000005d08fb82 type:MM_FILEPAGES val:33 [ 33.408154] BUG: Bad rss-counter state mm:000000005d08fb82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2622' (ECDSA) to the list of known hosts. 2023/06/20 16:42:53 fuzzer started 2023/06/20 16:42:54 dialing manager at localhost:36067 2023/06/20 16:42:54 checking machine... 2023/06/20 16:42:54 checking revisions... [ 34.064910] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:42:54 testing simple program... [ 34.105582] cgroup: Unknown subsys name 'net' [ 34.155392] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:42:53 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f9966056000 CR3=0000000015b72000 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=2033353a32343a3631203032206e754a XMM01=6964206465766965636552203a5d3033 XMM02=6f63736964203a31313a383235333320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033353a32343a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864b2031 RBX=0000000000000001 RCX=ffffffff864b202c RDX=0000000000000002 RSI=0000000000000001 RDI=ffffffff8604ebc4 RBP=ffff888015bd7930 RSP=ffff888015bd7868 R8 =ffffffff864b2008 R9 =ffff888015bd7918 R10=0000000000038001 R11=00000000000b5080 R12=ffff888015bd7938 R13=ffff888015bd7920 R14=ffff888015bd7919 R15=ffff888015bd78d8 RIP=ffffffff81130a7b RFL=00000202 [-------] 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 00007fd269140900 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=00007fd2696f5650 CR3=00000000100ce000 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