syzkaller login: [ 30.623351] BUG: Bad rss-counter state mm:00000000ce39b727 type:MM_FILEPAGES val:33 [ 30.624402] BUG: Bad rss-counter state mm:00000000ce39b727 type:MM_ANONPAGES val:22 [ 30.784616] ================================================================== [ 30.785654] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.786595] Read of size 8 at addr ffff888016b66ed8 by task sshd/219 [ 30.787492] [ 30.787713] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.788592] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.789601] Call Trace: [ 30.789929] [ 30.790221] dump_stack_lvl+0x91/0xf0 [ 30.790723] print_report+0xcc/0x620 [ 30.791210] ? __virt_addr_valid+0x102/0x340 [ 30.791769] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.792430] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.793044] kasan_report+0xbe/0xf0 [ 30.793529] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.794155] vma_interval_tree_remove+0xc75/0xec0 [ 30.794758] vma_prepare+0xc54/0x11a0 [ 30.795237] __split_vma+0x5af/0x950 [ 30.795722] ? __pfx___split_vma+0x10/0x10 [ 30.796263] ? find_held_lock+0x2c/0x110 [ 30.796804] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.797368] ? lock_is_held_type+0x9f/0x120 [ 30.797918] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.798525] ? mtree_range_walk+0x632/0x900 [ 30.799092] ? mas_walk+0x5c7/0x7c0 [ 30.799636] do_vmi_munmap+0x1f1/0x2b0 [ 30.800139] mmap_region+0x1f9/0x2660 [ 30.800641] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.801160] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.801879] ? __pfx_lock_acquire+0x10/0x10 [ 30.802410] ? __pfx_mmap_region+0x10/0x10 [ 30.802944] ? security_mmap_addr+0x7d/0xa0 [ 30.803485] ? get_unmapped_area+0x1f5/0x3f0 [ 30.804032] do_mmap+0x854/0xf00 [ 30.804499] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.804997] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.805561] ksys_mmap_pgoff+0x3af/0x500 [ 30.806068] do_syscall_64+0x3f/0x90 [ 30.806562] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.807211] RIP: 0033:0x7fb4670d4d82 [ 30.807667] 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 [ 30.809800] RSP: 002b:00007ffd5faed0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.810716] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb4670d4d82 [ 30.811575] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb46650e000 [ 30.812442] RBP: 00007fb46650e000 R08: 0000000000000009 R09: 0000000000001000 [ 30.813298] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561c354f6ec0 [ 30.814146] R13: 00007ffd5faed0d0 R14: 00007ffd5faed100 R15: 00007ffd5faed460 [ 30.815012] [ 30.815301] [ 30.815523] Allocated by task 212: [ 30.815959] kasan_save_stack+0x22/0x50 [ 30.816501] kasan_set_track+0x25/0x30 [ 30.816998] __kasan_slab_alloc+0x59/0x70 [ 30.817532] kmem_cache_alloc+0x16b/0x370 [ 30.818054] vm_area_dup+0x20/0x160 [ 30.818507] __split_vma+0x170/0x950 [ 30.818989] split_vma+0xc6/0x110 [ 30.819437] mprotect_fixup+0x8d2/0xb30 [ 30.819944] do_mprotect_pkey+0x87e/0xd40 [ 30.820484] __x64_sys_mprotect+0x78/0xc0 [ 30.821021] do_syscall_64+0x3f/0x90 [ 30.821503] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.822163] [ 30.822388] Freed by task 212: [ 30.822789] kasan_save_stack+0x22/0x50 [ 30.823291] kasan_set_track+0x25/0x30 [ 30.823800] kasan_save_free_info+0x2b/0x50 [ 30.824345] __kasan_slab_free+0x10a/0x190 [ 30.824881] kmem_cache_free+0x10d/0x4d0 [ 30.825394] rcu_core+0x8c8/0x2860 [ 30.825847] __do_softirq+0x1b7/0x7d4 [ 30.826336] [ 30.826560] Last potentially related work creation: [ 30.827163] kasan_save_stack+0x22/0x50 [ 30.827671] __kasan_record_aux_stack+0x8e/0xa0 [ 30.828255] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.828933] remove_vma+0x139/0x170 [ 30.829392] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.829951] do_vmi_munmap+0x1f1/0x2b0 [ 30.830439] __vm_munmap+0x138/0x3a0 [ 30.830906] __x64_sys_munmap+0x59/0x80 [ 30.831414] do_syscall_64+0x3f/0x90 [ 30.831892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.832547] [ 30.832768] The buggy address belongs to the object at ffff888016b66e80 [ 30.832768] which belongs to the cache vm_area_struct of size 168 [ 30.834261] The buggy address is located 88 bytes inside of [ 30.834261] freed 168-byte region [ffff888016b66e80, ffff888016b66f28) [ 30.835690] [ 30.835911] The buggy address belongs to the physical page: [ 30.836594] page:000000007dfba85d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b66 [ 30.837693] memcg:ffff88800edd8101 [ 30.838125] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.838784] page_type: 0xffffffff() [ 30.839243] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.840169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800edd8101 [ 30.841107] page dumped because: kasan: bad access detected [ 30.841784] [ 30.842001] Memory state around the buggy address: [ 30.842594] ffff888016b66d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.843452] ffff888016b66e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.844323] >ffff888016b66e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.845177] ^ [ 30.845901] ffff888016b66f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.846759] ffff888016b66f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.847606] ================================================================== [ 30.848570] Disabling lock debugging due to kernel taint [ 32.782807] BUG: Bad rss-counter state mm:0000000045c30fad type:MM_FILEPAGES val:33 [ 32.783689] BUG: Bad rss-counter state mm:0000000045c30fad type:MM_ANONPAGES val:22 [ 33.148007] BUG: Bad rss-counter state mm:00000000f208d55d type:MM_FILEPAGES val:33 [ 33.149077] BUG: Bad rss-counter state mm:00000000f208d55d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26171' (ECDSA) to the list of known hosts. 2023/06/20 21:43:34 fuzzer started 2023/06/20 21:43:34 dialing manager at localhost:36067 2023/06/20 21:43:34 checking machine... 2023/06/20 21:43:34 checking revisions... [ 33.825768] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:43:34 testing simple program... [ 33.888553] cgroup: Unknown subsys name 'net' [ 33.928945] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:43:34 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=00007f304adc01b0 CR3=000000001684e000 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=2033333a33343a3132203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a33343a3132203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffffffff86138e01 RDX=1ffff110039b2ed6 RSI=ffffffff8180c705 RDI=ffff88801cd97720 RBP=ffff88801cd976f0 RSP=ffff88801cd97648 R8 =ffffffff86138e90 R9 =ffff88801cd97698 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801cd97720 R13=0000000000000000 R14=ffff88800f6a0000 R15=0000000000092cc0 RIP=ffffffff813ad47f RFL=00000286 [--S--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 00007fb21cd26900 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=00007fb21d2dd618 CR3=000000000c72a000 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=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