syzkaller login: [ 31.718638] BUG: Bad rss-counter state mm:00000000ed346591 type:MM_FILEPAGES val:33 [ 31.719888] BUG: Bad rss-counter state mm:00000000ed346591 type:MM_ANONPAGES val:22 [ 31.886662] ================================================================== [ 31.887877] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.888942] Read of size 8 at addr ffff8880145fa140 by task sshd/220 [ 31.889747] [ 31.890004] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.890896] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.891884] Call Trace: [ 31.892211] [ 31.892497] dump_stack_lvl+0x91/0xf0 [ 31.892994] print_report+0xcc/0x620 [ 31.893483] ? __virt_addr_valid+0x102/0x340 [ 31.894056] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.894713] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.895346] kasan_report+0xbe/0xf0 [ 31.895825] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.896456] vma_interval_tree_remove+0xc75/0xec0 [ 31.897064] vma_prepare+0xc54/0x11a0 [ 31.897550] __split_vma+0x5af/0x950 [ 31.898026] ? __pfx___split_vma+0x10/0x10 [ 31.898575] ? find_held_lock+0x2c/0x110 [ 31.899100] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.899671] ? lock_is_held_type+0x9f/0x120 [ 31.900213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.900829] ? mtree_range_walk+0x632/0x900 [ 31.901382] ? mas_walk+0x5c7/0x7c0 [ 31.901858] do_vmi_munmap+0x1f1/0x2b0 [ 31.902365] mmap_region+0x1f9/0x2660 [ 31.902860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.903381] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.904105] ? __pfx_lock_acquire+0x10/0x10 [ 31.904644] ? __pfx_mmap_region+0x10/0x10 [ 31.905200] ? security_mmap_addr+0x7d/0xa0 [ 31.905735] ? get_unmapped_area+0x1f5/0x3f0 [ 31.906313] do_mmap+0x854/0xf00 [ 31.906758] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.907272] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.907836] ksys_mmap_pgoff+0x3af/0x500 [ 31.908345] do_syscall_64+0x3f/0x90 [ 31.908830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.909471] RIP: 0033:0x7f7d11ff6d82 [ 31.909930] 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 [ 31.912398] RSP: 002b:00007ffc9679ca78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.913389] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d11ff6d82 [ 31.914370] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d11430000 [ 31.915231] RBP: 00007f7d11430000 R08: 0000000000000009 R09: 0000000000001000 [ 31.916095] R10: 0000000000000812 R11: 0000000000000206 R12: 000056196c0d5ec0 [ 31.916949] R13: 00007ffc9679ca90 R14: 00007ffc9679cac0 R15: 00007ffc9679ce20 [ 31.917828] [ 31.918156] [ 31.918377] Allocated by task 213: [ 31.918812] kasan_save_stack+0x22/0x50 [ 31.919339] kasan_set_track+0x25/0x30 [ 31.919836] __kasan_slab_alloc+0x59/0x70 [ 31.920374] kmem_cache_alloc+0x16b/0x370 [ 31.920900] vm_area_dup+0x20/0x160 [ 31.921465] __split_vma+0x170/0x950 [ 31.922091] split_vma+0xc6/0x110 [ 31.922674] mprotect_fixup+0x8d2/0xb30 [ 31.923333] do_mprotect_pkey+0x87e/0xd40 [ 31.924001] __x64_sys_mprotect+0x78/0xc0 [ 31.924696] do_syscall_64+0x3f/0x90 [ 31.925324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.926215] [ 31.926503] Freed by task 213: [ 31.927030] kasan_save_stack+0x22/0x50 [ 31.927701] kasan_set_track+0x25/0x30 [ 31.928361] kasan_save_free_info+0x2b/0x50 [ 31.929073] __kasan_slab_free+0x10a/0x190 [ 31.929788] kmem_cache_free+0x10d/0x4d0 [ 31.930484] rcu_core+0x8c8/0x2860 [ 31.931087] __do_softirq+0x1b7/0x7d4 [ 31.931726] [ 31.932011] Last potentially related work creation: [ 31.932789] kasan_save_stack+0x22/0x50 [ 31.933460] __kasan_record_aux_stack+0x8e/0xa0 [ 31.934239] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.935089] remove_vma+0x139/0x170 [ 31.935690] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.936428] do_vmi_munmap+0x1f1/0x2b0 [ 31.937083] __vm_munmap+0x138/0x3a0 [ 31.937700] __x64_sys_munmap+0x59/0x80 [ 31.938387] do_syscall_64+0x3f/0x90 [ 31.939029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.939880] [ 31.940168] The buggy address belongs to the object at ffff8880145fa0e8 [ 31.940168] which belongs to the cache vm_area_struct of size 168 [ 31.942146] The buggy address is located 88 bytes inside of [ 31.942146] freed 168-byte region [ffff8880145fa0e8, ffff8880145fa190) [ 31.944007] [ 31.944292] The buggy address belongs to the physical page: [ 31.945170] page:00000000c0055e00 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145fa [ 31.946633] memcg:ffff888015e98301 [ 31.947200] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.948068] page_type: 0xffffffff() [ 31.948669] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.949887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e98301 [ 31.950878] page dumped because: kasan: bad access detected [ 31.951542] [ 31.951762] Memory state around the buggy address: [ 31.952332] ffff8880145fa000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.953191] ffff8880145fa080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.954053] >ffff8880145fa100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.954919] ^ [ 31.955569] ffff8880145fa180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.956437] ffff8880145fa200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.957298] ================================================================== [ 31.958398] Disabling lock debugging due to kernel taint [ 33.928939] BUG: Bad rss-counter state mm:000000005dd83863 type:MM_FILEPAGES val:33 [ 33.930086] BUG: Bad rss-counter state mm:000000005dd83863 type:MM_ANONPAGES val:22 [ 34.300553] BUG: Bad rss-counter state mm:000000005176fbd1 type:MM_FILEPAGES val:33 [ 34.301634] BUG: Bad rss-counter state mm:000000005176fbd1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51597' (ECDSA) to the list of known hosts. 2023/06/19 14:09:37 fuzzer started 2023/06/19 14:09:37 dialing manager at localhost:44161 2023/06/19 14:09:37 checking machine... 2023/06/19 14:09:37 checking revisions... [ 35.034629] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:09:37 testing simple program... [ 35.087815] cgroup: Unknown subsys name 'net' [ 35.138631] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:09:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff8386dfa9 RDX=00000000000286df RSI=00000000000286df RDI=ffffffff8658973c RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000091af6 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09a91 R15=ffff88806ce09a50 RIP=ffffffff8113077a RFL=00000217 [----APC] 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 00007f2f09672900 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=00007f2f09c29618 CR3=000000000e93c000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007ffdf44122b8 CR3=000000000c524000 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=2036333a39303a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036333a39303a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000