syzkaller login: [ 32.743756] BUG: Bad rss-counter state mm:00000000226684da type:MM_FILEPAGES val:33 [ 32.744777] BUG: Bad rss-counter state mm:00000000226684da type:MM_ANONPAGES val:22 [ 32.903681] ================================================================== [ 32.904634] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.905610] Read of size 8 at addr ffff888018130140 by task sshd/220 [ 32.906408] [ 32.906752] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.907674] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.908642] Call Trace: [ 32.908995] [ 32.909282] dump_stack_lvl+0x91/0xf0 [ 32.909766] print_report+0xcc/0x620 [ 32.910252] ? __virt_addr_valid+0x102/0x340 [ 32.910806] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.911413] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.912032] kasan_report+0xbe/0xf0 [ 32.912508] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.913144] vma_interval_tree_remove+0xc75/0xec0 [ 32.913741] vma_prepare+0xc54/0x11a0 [ 32.914221] __split_vma+0x5af/0x950 [ 32.914697] ? __pfx___split_vma+0x10/0x10 [ 32.915234] ? find_held_lock+0x2c/0x110 [ 32.915751] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.916308] ? lock_is_held_type+0x9f/0x120 [ 32.916842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.917467] ? mtree_range_walk+0x632/0x900 [ 32.918012] ? mas_walk+0x5c7/0x7c0 [ 32.918484] do_vmi_munmap+0x1f1/0x2b0 [ 32.918976] mmap_region+0x1f9/0x2660 [ 32.919462] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.919974] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.920686] ? __pfx_lock_acquire+0x10/0x10 [ 32.921229] ? __pfx_mmap_region+0x10/0x10 [ 32.921769] ? security_mmap_addr+0x7d/0xa0 [ 32.922300] ? get_unmapped_area+0x1f5/0x3f0 [ 32.922858] do_mmap+0x854/0xf00 [ 32.923296] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.923789] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.924359] ksys_mmap_pgoff+0x3af/0x500 [ 32.924889] do_syscall_64+0x3f/0x90 [ 32.925395] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.926050] RIP: 0033:0x7ff127305d82 [ 32.926512] 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 [ 32.928694] RSP: 002b:00007ffdaba41fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.929606] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff127305d82 [ 32.930460] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff12673f000 [ 32.931334] RBP: 00007ff12673f000 R08: 0000000000000009 R09: 0000000000001000 [ 32.932169] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573e38e0ec0 [ 32.933021] R13: 00007ffdaba41fd0 R14: 00007ffdaba42000 R15: 00007ffdaba42360 [ 32.933865] [ 32.934153] [ 32.934367] Allocated by task 213: [ 32.934796] kasan_save_stack+0x22/0x50 [ 32.935306] kasan_set_track+0x25/0x30 [ 32.935796] __kasan_slab_alloc+0x59/0x70 [ 32.936331] kmem_cache_alloc+0x16b/0x370 [ 32.936840] vm_area_dup+0x20/0x160 [ 32.937314] __split_vma+0x170/0x950 [ 32.937782] split_vma+0xc6/0x110 [ 32.938215] mprotect_fixup+0x8d2/0xb30 [ 32.938712] do_mprotect_pkey+0x87e/0xd40 [ 32.939231] __x64_sys_mprotect+0x78/0xc0 [ 32.939743] do_syscall_64+0x3f/0x90 [ 32.940222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.940873] [ 32.941092] Freed by task 203: [ 32.941497] kasan_save_stack+0x22/0x50 [ 32.942013] kasan_set_track+0x25/0x30 [ 32.942513] kasan_save_free_info+0x2b/0x50 [ 32.943054] __kasan_slab_free+0x10a/0x190 [ 32.943596] kmem_cache_free+0x10d/0x4d0 [ 32.944117] rcu_core+0x8c8/0x2860 [ 32.944568] __do_softirq+0x1b7/0x7d4 [ 32.945076] [ 32.945301] Last potentially related work creation: [ 32.945910] kasan_save_stack+0x22/0x50 [ 32.946440] __kasan_record_aux_stack+0x8e/0xa0 [ 32.947031] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.947700] remove_vma+0x139/0x170 [ 32.948244] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.948819] do_vmi_munmap+0x1f1/0x2b0 [ 32.949335] __vm_munmap+0x138/0x3a0 [ 32.949825] __x64_sys_munmap+0x59/0x80 [ 32.950357] do_syscall_64+0x3f/0x90 [ 32.950863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.951529] [ 32.951749] The buggy address belongs to the object at ffff8880181300e8 [ 32.951749] which belongs to the cache vm_area_struct of size 168 [ 32.953281] The buggy address is located 88 bytes inside of [ 32.953281] freed 168-byte region [ffff8880181300e8, ffff888018130190) [ 32.954752] [ 32.954975] The buggy address belongs to the physical page: [ 32.955665] page:00000000eee3bb8e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18130 [ 32.956801] memcg:ffff888009e9ed01 [ 32.957257] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.957931] page_type: 0xffffffff() [ 32.958402] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.959358] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009e9ed01 [ 32.960308] page dumped because: kasan: bad access detected [ 32.961005] [ 32.961229] Memory state around the buggy address: [ 32.961840] ffff888018130000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.962737] ffff888018130080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 32.963648] >ffff888018130100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.964541] ^ [ 32.965223] ffff888018130180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 32.966114] ffff888018130200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 32.966994] ================================================================== [ 32.967962] Disabling lock debugging due to kernel taint [ 35.057842] BUG: Bad rss-counter state mm:00000000142664af type:MM_FILEPAGES val:33 [ 35.059011] BUG: Bad rss-counter state mm:00000000142664af type:MM_ANONPAGES val:22 [ 35.577913] BUG: Bad rss-counter state mm:00000000f7d640fa type:MM_FILEPAGES val:33 [ 35.579169] BUG: Bad rss-counter state mm:00000000f7d640fa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:46376' (ECDSA) to the list of known hosts. 2023/06/19 13:30:00 fuzzer started 2023/06/19 13:30:00 dialing manager at localhost:44161 2023/06/19 13:30:00 checking machine... 2023/06/19 13:30:00 checking revisions... [ 36.324176] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:30:00 testing simple program... [ 36.381424] cgroup: Unknown subsys name 'net' [ 36.422516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:29:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffcbe460f08 CR3=000000000e49c000 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=30333a3331203931206e754a3e38333c XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732030303a3033 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323330 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff84601286 RBX=0000000000000011 RCX=0000000000000001 RDX=0000000000000d40 RSI=0000000000000012 RDI=ffff88800d61f6d8 RBP=dffffc0000000000 RSP=ffff88800d61f5c0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000012 R13=0000000000000d40 R14=ffff88800d61f650 R15=0000000000000d40 RIP=ffffffff813ad5cf 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 00007f05178d0900 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=00007f0516d11960 CR3=000000000ca52000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=a2118b09d656c94000000000000ae988 XMM05=1424c773fb7178f60000000000134fc8 XMM06=19e9129bd510f2350000000000133e60 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000