syzkaller login: [ 33.619119] BUG: Bad rss-counter state mm:00000000cfd4ee19 type:MM_FILEPAGES val:33 [ 33.620591] BUG: Bad rss-counter state mm:00000000cfd4ee19 type:MM_ANONPAGES val:22 [ 33.778743] ================================================================== [ 33.779646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.780583] Read of size 8 at addr ffff88800e0aa310 by task sshd/220 [ 33.781343] [ 33.781662] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.782513] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.783474] Call Trace: [ 33.783792] [ 33.784075] dump_stack_lvl+0x91/0xf0 [ 33.784572] print_report+0xcc/0x620 [ 33.785063] ? __virt_addr_valid+0x102/0x340 [ 33.785646] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.786279] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.786907] kasan_report+0xbe/0xf0 [ 33.787395] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.788027] vma_interval_tree_remove+0xc75/0xec0 [ 33.788646] vma_prepare+0xc54/0x11a0 [ 33.789125] __split_vma+0x5af/0x950 [ 33.789616] ? __pfx___split_vma+0x10/0x10 [ 33.790145] ? find_held_lock+0x2c/0x110 [ 33.790666] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.791231] ? lock_is_held_type+0x9f/0x120 [ 33.791777] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.792382] ? mtree_range_walk+0x632/0x900 [ 33.792938] ? mas_walk+0x5c7/0x7c0 [ 33.793413] do_vmi_munmap+0x1f1/0x2b0 [ 33.793888] mmap_region+0x1f9/0x2660 [ 33.794380] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.794900] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.795616] ? __pfx_lock_acquire+0x10/0x10 [ 33.796155] ? __pfx_mmap_region+0x10/0x10 [ 33.796687] ? security_mmap_addr+0x7d/0xa0 [ 33.797223] ? get_unmapped_area+0x1f5/0x3f0 [ 33.797798] do_mmap+0x854/0xf00 [ 33.798243] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.798743] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.799308] ksys_mmap_pgoff+0x3af/0x500 [ 33.799823] do_syscall_64+0x3f/0x90 [ 33.800307] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.800969] RIP: 0033:0x7fd9e729fd82 [ 33.801435] 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 [ 33.803573] RSP: 002b:00007ffc9b918eb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.804471] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd9e729fd82 [ 33.805312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd9e66d9000 [ 33.806167] RBP: 00007fd9e66d9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.807019] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557eea005ec0 [ 33.807875] R13: 00007ffc9b918ed0 R14: 00007ffc9b918f00 R15: 00007ffc9b919260 [ 33.808736] [ 33.809029] [ 33.809247] Allocated by task 213: [ 33.809700] kasan_save_stack+0x22/0x50 [ 33.810208] kasan_set_track+0x25/0x30 [ 33.810704] __kasan_slab_alloc+0x59/0x70 [ 33.811231] kmem_cache_alloc+0x16b/0x370 [ 33.811750] vm_area_dup+0x20/0x160 [ 33.812209] __split_vma+0x170/0x950 [ 33.812683] split_vma+0xc6/0x110 [ 33.813125] mprotect_fixup+0x8d2/0xb30 [ 33.813646] do_mprotect_pkey+0x87e/0xd40 [ 33.814171] __x64_sys_mprotect+0x78/0xc0 [ 33.814703] do_syscall_64+0x3f/0x90 [ 33.815184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.815831] [ 33.816049] Freed by task 19: [ 33.816430] kasan_save_stack+0x22/0x50 [ 33.816937] kasan_set_track+0x25/0x30 [ 33.817435] kasan_save_free_info+0x2b/0x50 [ 33.817997] __kasan_slab_free+0x10a/0x190 [ 33.818535] kmem_cache_free+0x10d/0x4d0 [ 33.819043] rcu_core+0x8c8/0x2860 [ 33.819484] __do_softirq+0x1b7/0x7d4 [ 33.819993] [ 33.820207] Last potentially related work creation: [ 33.820794] kasan_save_stack+0x22/0x50 [ 33.821296] __kasan_record_aux_stack+0x8e/0xa0 [ 33.821878] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.822519] remove_vma+0x139/0x170 [ 33.823059] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.823617] do_vmi_munmap+0x1f1/0x2b0 [ 33.824111] __vm_munmap+0x138/0x3a0 [ 33.824580] __x64_sys_munmap+0x59/0x80 [ 33.825081] do_syscall_64+0x3f/0x90 [ 33.825579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.826214] [ 33.826433] Second to last potentially related work creation: [ 33.827115] kasan_save_stack+0x22/0x50 [ 33.827734] __kasan_record_aux_stack+0x8e/0xa0 [ 33.828303] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.828939] remove_vma+0x139/0x170 [ 33.829386] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.829950] do_vmi_munmap+0x1f1/0x2b0 [ 33.830426] mmap_region+0x1f9/0x2660 [ 33.830890] do_mmap+0x854/0xf00 [ 33.831309] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.831782] ksys_mmap_pgoff+0x3af/0x500 [ 33.832272] do_syscall_64+0x3f/0x90 [ 33.832744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.833371] [ 33.833586] The buggy address belongs to the object at ffff88800e0aa2b8 [ 33.833586] which belongs to the cache vm_area_struct of size 168 [ 33.835038] The buggy address is located 88 bytes inside of [ 33.835038] freed 168-byte region [ffff88800e0aa2b8, ffff88800e0aa360) [ 33.836410] [ 33.836620] The buggy address belongs to the physical page: [ 33.837265] page:000000005b5e51d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0aa [ 33.838355] memcg:ffff88800eb8da01 [ 33.838774] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.839415] page_type: 0xffffffff() [ 33.839862] raw: 0100000000000200 ffff88800879fc80 ffffea0000404f40 dead000000000004 [ 33.840779] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb8da01 [ 33.841666] page dumped because: kasan: bad access detected [ 33.842306] [ 33.842515] Memory state around the buggy address: [ 33.843081] ffff88800e0aa200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 33.843935] ffff88800e0aa280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.844788] >ffff88800e0aa300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.845638] ^ [ 33.846100] ffff88800e0aa380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.846964] ffff88800e0aa400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 33.847807] ================================================================== [ 33.848728] Disabling lock debugging due to kernel taint [ 35.856321] BUG: Bad rss-counter state mm:000000000f5c4a9f type:MM_FILEPAGES val:33 [ 35.857064] BUG: Bad rss-counter state mm:000000000f5c4a9f type:MM_ANONPAGES val:22 [ 36.417850] BUG: Bad rss-counter state mm:0000000085372baa type:MM_FILEPAGES val:33 [ 36.418970] BUG: Bad rss-counter state mm:0000000085372baa type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13229' (ECDSA) to the list of known hosts. 2023/06/20 00:53:25 fuzzer started 2023/06/20 00:53:26 dialing manager at localhost:44161 2023/06/20 00:53:26 checking machine... 2023/06/20 00:53:26 checking revisions... [ 37.097593] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:53:26 testing simple program... [ 37.153754] cgroup: Unknown subsys name 'net' [ 37.190489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:53:23 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=ffffffff836518d1 RDX=ffff888019f49b40 RSI=0000000000000000 RDI=0000000000000005 RBP=ffff888019f49b40 RSP=ffff88801ce27d28 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffffffff87f9478c R14=0000000000000010 R15=0000000000000001 RIP=ffffffff814c07eb 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 00007f71e24e5900 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=00007f71e2a9c618 CR3=000000000e712000 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=ffff888008c58400 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=00007fdc12866010 CR3=000000000cbe0000 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=a0b4c97c7d7d3ebdf24437bb03adc64c XMM02=000000000011f990ec2efd57dc4c00df XMM03=00000000001240784f8780d541c6b1a1 XMM04=ec954d2fce618a6300000000000ae988 XMM05=19e9129bd510f2350000000000134f50 XMM06=04426988d2d57b3e0000000000133db8 XMM07=e042d86d42eb936e00000000001242f8 XMM08=4f8780d541c6b1a1000000000011f9f0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000