syzkaller login: [ 37.710629] BUG: Bad rss-counter state mm:000000009393b582 type:MM_FILEPAGES val:33 [ 37.712937] BUG: Bad rss-counter state mm:000000009393b582 type:MM_ANONPAGES val:22 [ 37.868291] ================================================================== [ 37.869151] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.870031] Read of size 8 at addr ffff88800967e6b0 by task sshd/219 [ 37.870767] [ 37.870980] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.871900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.872832] Call Trace: [ 37.873138] [ 37.873406] dump_stack_lvl+0x91/0xf0 [ 37.873866] print_report+0xcc/0x620 [ 37.874325] ? __virt_addr_valid+0x102/0x340 [ 37.874870] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.875450] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.876059] kasan_report+0xbe/0xf0 [ 37.876552] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.877184] vma_interval_tree_remove+0xc75/0xec0 [ 37.877783] vma_prepare+0xc54/0x11a0 [ 37.878264] __split_vma+0x5af/0x950 [ 37.878744] ? __pfx___split_vma+0x10/0x10 [ 37.879291] ? find_held_lock+0x2c/0x110 [ 37.879811] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.880383] ? lock_is_held_type+0x9f/0x120 [ 37.880934] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.881534] ? mtree_range_walk+0x632/0x900 [ 37.882085] ? mas_walk+0x5c7/0x7c0 [ 37.882570] do_vmi_munmap+0x1f1/0x2b0 [ 37.883063] mmap_region+0x1f9/0x2660 [ 37.883548] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.884063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.884773] ? __pfx_lock_acquire+0x10/0x10 [ 37.885308] ? __pfx_mmap_region+0x10/0x10 [ 37.885839] ? security_mmap_addr+0x7d/0xa0 [ 37.886365] ? get_unmapped_area+0x1f5/0x3f0 [ 37.886921] do_mmap+0x854/0xf00 [ 37.887356] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.887851] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.888411] ksys_mmap_pgoff+0x3af/0x500 [ 37.888912] do_syscall_64+0x3f/0x90 [ 37.889391] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.890045] RIP: 0033:0x7f19f855dd82 [ 37.890508] 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 [ 37.892647] RSP: 002b:00007fff0febefb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.893554] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f19f855dd82 [ 37.894399] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f19f7997000 [ 37.895249] RBP: 00007f19f7997000 R08: 0000000000000009 R09: 0000000000001000 [ 37.896109] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617624c1ec0 [ 37.896967] R13: 00007fff0febefd0 R14: 00007fff0febf000 R15: 00007fff0febf360 [ 37.897815] [ 37.898105] [ 37.898319] Allocated by task 212: [ 37.898770] kasan_save_stack+0x22/0x50 [ 37.899279] kasan_set_track+0x25/0x30 [ 37.899775] __kasan_slab_alloc+0x59/0x70 [ 37.900301] kmem_cache_alloc+0x16b/0x370 [ 37.900820] vm_area_dup+0x20/0x160 [ 37.901283] __split_vma+0x170/0x950 [ 37.901753] split_vma+0xc6/0x110 [ 37.902191] mprotect_fixup+0x8d2/0xb30 [ 37.902703] do_mprotect_pkey+0x87e/0xd40 [ 37.903222] __x64_sys_mprotect+0x78/0xc0 [ 37.903746] do_syscall_64+0x3f/0x90 [ 37.904228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.904872] [ 37.905221] Freed by task 203: [ 37.905622] kasan_save_stack+0x22/0x50 [ 37.906144] kasan_set_track+0x25/0x30 [ 37.906682] kasan_save_free_info+0x2b/0x50 [ 37.907238] __kasan_slab_free+0x10a/0x190 [ 37.907805] kmem_cache_free+0x10d/0x4d0 [ 37.908346] rcu_core+0x8c8/0x2860 [ 37.908805] __do_softirq+0x1b7/0x7d4 [ 37.909307] [ 37.909530] Last potentially related work creation: [ 37.910148] kasan_save_stack+0x22/0x50 [ 37.910687] __kasan_record_aux_stack+0x8e/0xa0 [ 37.911285] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.911955] remove_vma+0x139/0x170 [ 37.912428] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.913101] do_vmi_munmap+0x1f1/0x2b0 [ 37.913604] __vm_munmap+0x138/0x3a0 [ 37.914086] __x64_sys_munmap+0x59/0x80 [ 37.914612] do_syscall_64+0x3f/0x90 [ 37.915116] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.915791] [ 37.916012] Second to last potentially related work creation: [ 37.916723] kasan_save_stack+0x22/0x50 [ 37.917238] __kasan_record_aux_stack+0x8e/0xa0 [ 37.917827] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.918510] remove_vma+0x139/0x170 [ 37.918979] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.919570] do_vmi_munmap+0x1f1/0x2b0 [ 37.920097] mmap_region+0x1f9/0x2660 [ 37.920599] do_mmap+0x854/0xf00 [ 37.921060] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.921570] ksys_mmap_pgoff+0x3af/0x500 [ 37.922107] do_syscall_64+0x3f/0x90 [ 37.922613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.923276] [ 37.923504] The buggy address belongs to the object at ffff88800967e658 [ 37.923504] which belongs to the cache vm_area_struct of size 168 [ 37.925022] The buggy address is located 88 bytes inside of [ 37.925022] freed 168-byte region [ffff88800967e658, ffff88800967e700) [ 37.926507] [ 37.926732] The buggy address belongs to the physical page: [ 37.927402] page:000000006744f822 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x967e [ 37.928517] memcg:ffff8880140d0901 [ 37.928959] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.929682] page_type: 0xffffffff() [ 37.930137] raw: 0100000000000200 ffff88800879fc80 ffffea0000331040 dead000000000005 [ 37.931120] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140d0901 [ 37.932043] page dumped because: kasan: bad access detected [ 37.932711] [ 37.932941] Memory state around the buggy address: [ 37.933546] ffff88800967e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.934427] ffff88800967e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 37.935342] >ffff88800967e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.936235] ^ [ 37.936845] ffff88800967e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 37.937712] ffff88800967e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 37.938618] ================================================================== [ 37.939577] Disabling lock debugging due to kernel taint [ 40.287567] BUG: Bad rss-counter state mm:00000000f0366d19 type:MM_FILEPAGES val:33 [ 40.288763] BUG: Bad rss-counter state mm:00000000f0366d19 type:MM_ANONPAGES val:22 [ 40.827380] BUG: Bad rss-counter state mm:00000000ee33ab4f type:MM_FILEPAGES val:33 [ 40.828565] BUG: Bad rss-counter state mm:00000000ee33ab4f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25985' (ECDSA) to the list of known hosts. 2023/06/19 10:50:33 fuzzer started 2023/06/19 10:50:33 dialing manager at localhost:44161 2023/06/19 10:50:33 checking machine... 2023/06/19 10:50:33 checking revisions... [ 41.402731] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:50:33 testing simple program... [ 41.444642] cgroup: Unknown subsys name 'net' [ 41.492432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:50:31 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=00007ffc0a6f3ee8 CR3=000000000e7dc000 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=2033333a30353a3031203931206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a30353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff83ab4207 RDI=ffffffff87f9468c RBP=0000000000000000 RSP=ffff888016db7500 R8 =0000000000000000 R9 =fffffbfff0ff29c8 R10=ffffffff87f94e43 R11=00000c4b00000c4b R12=0000000000000000 R13=00000000000000f7 R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff814c07f1 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 00007f325a765900 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=00007f325ad1c618 CR3=00000000094d4000 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