syzkaller login: [ 28.786059] BUG: Bad rss-counter state mm:00000000d23b7cad type:MM_FILEPAGES val:33 [ 28.787354] BUG: Bad rss-counter state mm:00000000d23b7cad type:MM_ANONPAGES val:22 [ 28.951719] ================================================================== [ 28.952795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.953997] Read of size 8 at addr ffff8880197d9798 by task sshd/219 [ 28.954767] [ 28.954992] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.955872] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.956847] Call Trace: [ 28.957167] [ 28.957459] dump_stack_lvl+0x91/0xf0 [ 28.957958] print_report+0xcc/0x620 [ 28.958438] ? __virt_addr_valid+0x102/0x340 [ 28.958991] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.959597] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.960217] kasan_report+0xbe/0xf0 [ 28.960695] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.961308] vma_interval_tree_remove+0xc75/0xec0 [ 28.961906] vma_prepare+0xc54/0x11a0 [ 28.962386] __split_vma+0x5af/0x950 [ 28.962878] ? __pfx___split_vma+0x10/0x10 [ 28.963413] ? find_held_lock+0x2c/0x110 [ 28.963924] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.964483] ? lock_is_held_type+0x9f/0x120 [ 28.965022] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.965625] ? mtree_range_walk+0x632/0x900 [ 28.966180] ? mas_walk+0x5c7/0x7c0 [ 28.966657] do_vmi_munmap+0x1f1/0x2b0 [ 28.967160] mmap_region+0x1f9/0x2660 [ 28.967646] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.968161] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.968878] ? __pfx_lock_acquire+0x10/0x10 [ 28.969415] ? __pfx_mmap_region+0x10/0x10 [ 28.969948] ? security_mmap_addr+0x7d/0xa0 [ 28.970482] ? get_unmapped_area+0x1f5/0x3f0 [ 28.971039] do_mmap+0x854/0xf00 [ 28.971477] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.971971] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.972533] ksys_mmap_pgoff+0x3af/0x500 [ 28.973039] do_syscall_64+0x3f/0x90 [ 28.973517] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.974165] RIP: 0033:0x7fabbd338d82 [ 28.974619] 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 [ 28.976796] RSP: 002b:00007fffbab044a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.977724] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fabbd338d82 [ 28.978566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fabbc772000 [ 28.979421] RBP: 00007fabbc772000 R08: 0000000000000009 R09: 0000000000001000 [ 28.980255] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aa65caa980 [ 28.981095] R13: 00007fffbab044c0 R14: 00007fffbab044f0 R15: 00007fffbab04850 [ 28.981964] [ 28.982259] [ 28.982478] Allocated by task 212: [ 28.982916] kasan_save_stack+0x22/0x50 [ 28.983420] kasan_set_track+0x25/0x30 [ 28.983916] __kasan_slab_alloc+0x59/0x70 [ 28.984439] kmem_cache_alloc+0x16b/0x370 [ 28.984957] vm_area_dup+0x20/0x160 [ 28.985406] __split_vma+0x170/0x950 [ 28.985866] split_vma+0xc6/0x110 [ 28.986306] mprotect_fixup+0x8d2/0xb30 [ 28.986817] do_mprotect_pkey+0x87e/0xd40 [ 28.987341] __x64_sys_mprotect+0x78/0xc0 [ 28.987859] do_syscall_64+0x3f/0x90 [ 28.988340] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.988981] [ 28.989198] Freed by task 19: [ 28.989581] kasan_save_stack+0x22/0x50 [ 28.990083] kasan_set_track+0x25/0x30 [ 28.990577] kasan_save_free_info+0x2b/0x50 [ 28.991113] __kasan_slab_free+0x10a/0x190 [ 28.991648] kmem_cache_free+0x10d/0x4d0 [ 28.992156] rcu_core+0x8c8/0x2860 [ 28.992598] __do_softirq+0x1b7/0x7d4 [ 28.993081] [ 28.993297] Last potentially related work creation: [ 28.993881] kasan_save_stack+0x22/0x50 [ 28.994385] __kasan_record_aux_stack+0x8e/0xa0 [ 28.994971] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.995611] remove_vma+0x139/0x170 [ 28.996065] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.996621] do_vmi_munmap+0x1f1/0x2b0 [ 28.997109] __vm_munmap+0x138/0x3a0 [ 28.997575] __x64_sys_munmap+0x59/0x80 [ 28.998071] do_syscall_64+0x3f/0x90 [ 28.998549] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.999199] [ 28.999416] The buggy address belongs to the object at ffff8880197d9740 [ 28.999416] which belongs to the cache vm_area_struct of size 168 [ 29.000882] The buggy address is located 88 bytes inside of [ 29.000882] freed 168-byte region [ffff8880197d9740, ffff8880197d97e8) [ 29.002275] [ 29.002491] The buggy address belongs to the physical page: [ 29.003161] page:00000000f4e3c40f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x197d9 [ 29.004251] memcg:ffff88800c856901 [ 29.004678] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.005325] page_type: 0xffffffff() [ 29.005775] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.006705] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c856901 [ 29.007615] page dumped because: kasan: bad access detected [ 29.008277] [ 29.008493] Memory state around the buggy address: [ 29.009073] ffff8880197d9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.009927] ffff8880197d9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.010792] >ffff8880197d9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.011637] ^ [ 29.012128] ffff8880197d9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.012983] ffff8880197d9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.013837] ================================================================== [ 29.014897] Disabling lock debugging due to kernel taint [ 30.847326] BUG: Bad rss-counter state mm:0000000099ef4c2d type:MM_FILEPAGES val:33 [ 30.848079] BUG: Bad rss-counter state mm:0000000099ef4c2d type:MM_ANONPAGES val:22 [ 31.289075] BUG: Bad rss-counter state mm:00000000de89b711 type:MM_FILEPAGES val:33 [ 31.290071] BUG: Bad rss-counter state mm:00000000de89b711 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14366' (ECDSA) to the list of known hosts. 2023/06/21 04:33:28 fuzzer started 2023/06/21 04:33:29 dialing manager at localhost:36067 2023/06/21 04:33:29 checking machine... 2023/06/21 04:33:29 checking revisions... [ 32.051164] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:33:29 testing simple program... [ 32.107071] cgroup: Unknown subsys name 'net' [ 32.144891] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:33:28 Registers: info registers vcpu 0 RAX=ffffffff86098093 RBX=0000000000000001 RCX=ffffffff86098092 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88800951f980 RSP=ffff88800951f868 R8 =ffffffff86098096 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffff88800951f988 R13=ffff88800951f970 R14=ffff88800951f8d8 R15=ffff88800951f928 RIP=ffffffff81130b99 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 00007fae5ad6c900 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=00007fae5b3240b0 CR3=000000000e450000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88806cf09b60 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff81289068 RDI=ffff88806cf09b6c RBP=000000000000000d RSP=ffff88806cf09a78 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000ba8f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800da05c00 RIP=ffffffff813ad4ee RFL=00000213 [----A-C] 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 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=00007f787e294dc0 CR3=000000000c6b2000 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=5d8fbb99b0ddb4bd944cabd9f964cca8 XMM02=ec2efd57dc4c00df000000000011d180 XMM03=36b3c955432d91bc000000000011d250 XMM04=2e653ec0752ec57200000000000ae988 XMM05=19e9129bd510f2350000000000131678 XMM06=3ba7b40ddbc1e92500000000001304e0 XMM07=e042d86d42eb936e0000000000121440 XMM08=36b3c955432d91bc000000000011d250 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000