syzkaller login: [ 40.952399] BUG: Bad rss-counter state mm:00000000e3bd5068 type:MM_FILEPAGES val:33 [ 40.953589] BUG: Bad rss-counter state mm:00000000e3bd5068 type:MM_ANONPAGES val:22 [ 41.034002] ================================================================== [ 41.034919] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.035874] Read of size 8 at addr ffff88800e2d64e0 by task sshd/219 [ 41.036754] [ 41.036992] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.037871] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.038868] Call Trace: [ 41.039184] [ 41.039467] dump_stack_lvl+0x91/0xf0 [ 41.039976] print_report+0xcc/0x620 [ 41.040466] ? __virt_addr_valid+0x102/0x340 [ 41.041058] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.041687] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.042324] kasan_report+0xbe/0xf0 [ 41.042819] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.043444] vma_interval_tree_remove+0xc75/0xec0 [ 41.044056] vma_prepare+0xc54/0x11a0 [ 41.044535] __split_vma+0x5af/0x950 [ 41.045045] ? __pfx___split_vma+0x10/0x10 [ 41.045570] ? find_held_lock+0x2c/0x110 [ 41.046104] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.046662] ? lock_is_held_type+0x9f/0x120 [ 41.047210] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.047823] ? mtree_range_walk+0x632/0x900 [ 41.048366] ? mas_walk+0x5c7/0x7c0 [ 41.048847] do_vmi_munmap+0x1f1/0x2b0 [ 41.049357] mmap_region+0x1f9/0x2660 [ 41.049850] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.050355] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.051120] ? __pfx_lock_acquire+0x10/0x10 [ 41.051657] ? __pfx_mmap_region+0x10/0x10 [ 41.052215] ? security_mmap_addr+0x7d/0xa0 [ 41.052765] ? get_unmapped_area+0x1f5/0x3f0 [ 41.053349] do_mmap+0x854/0xf00 [ 41.053803] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.054306] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.054875] ksys_mmap_pgoff+0x3af/0x500 [ 41.055393] do_syscall_64+0x3f/0x90 [ 41.055880] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.056532] RIP: 0033:0x7f8e24a06d82 [ 41.057006] 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 [ 41.059170] RSP: 002b:00007fff16929c68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.060108] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8e24a06d82 [ 41.060978] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8e23e40000 [ 41.061842] RBP: 00007f8e23e40000 R08: 0000000000000009 R09: 0000000000001000 [ 41.062711] R10: 0000000000000812 R11: 0000000000000206 R12: 000055730f214ec0 [ 41.063575] R13: 00007fff16929c80 R14: 00007fff16929cb0 R15: 00007fff1692a010 [ 41.064448] [ 41.064757] [ 41.064993] Allocated by task 212: [ 41.065419] kasan_save_stack+0x22/0x50 [ 41.065936] kasan_set_track+0x25/0x30 [ 41.066442] __kasan_slab_alloc+0x59/0x70 [ 41.066979] kmem_cache_alloc+0x16b/0x370 [ 41.067501] vm_area_dup+0x20/0x160 [ 41.067974] __split_vma+0x170/0x950 [ 41.068440] split_vma+0xc6/0x110 [ 41.068893] mprotect_fixup+0x8d2/0xb30 [ 41.069431] do_mprotect_pkey+0x87e/0xd40 [ 41.069969] __x64_sys_mprotect+0x78/0xc0 [ 41.070492] do_syscall_64+0x3f/0x90 [ 41.070981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.071627] [ 41.071851] Freed by task 212: [ 41.072255] kasan_save_stack+0x22/0x50 [ 41.072770] kasan_set_track+0x25/0x30 [ 41.073285] kasan_save_free_info+0x2b/0x50 [ 41.073840] __kasan_slab_free+0x10a/0x190 [ 41.074377] kmem_cache_free+0x10d/0x4d0 [ 41.074894] rcu_core+0x8c8/0x2860 [ 41.075348] __do_softirq+0x1b7/0x7d4 [ 41.075837] [ 41.076053] Last potentially related work creation: [ 41.076650] kasan_save_stack+0x22/0x50 [ 41.077182] __kasan_record_aux_stack+0x8e/0xa0 [ 41.077778] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.078428] remove_vma+0x139/0x170 [ 41.078893] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.079464] do_vmi_munmap+0x1f1/0x2b0 [ 41.079959] __vm_munmap+0x138/0x3a0 [ 41.080428] __x64_sys_munmap+0x59/0x80 [ 41.080950] do_syscall_64+0x3f/0x90 [ 41.081434] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.082095] [ 41.082319] The buggy address belongs to the object at ffff88800e2d6488 [ 41.082319] which belongs to the cache vm_area_struct of size 168 [ 41.083818] The buggy address is located 88 bytes inside of [ 41.083818] freed 168-byte region [ffff88800e2d6488, ffff88800e2d6530) [ 41.085268] [ 41.085482] The buggy address belongs to the physical page: [ 41.086156] page:00000000eec238f2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2d6 [ 41.087261] memcg:ffff88800d965e01 [ 41.087695] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.088405] page_type: 0xffffffff() [ 41.088867] raw: 0100000000000200 ffff88800879fc80 ffffea0000673200 dead000000000003 [ 41.089804] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d965e01 [ 41.090724] page dumped because: kasan: bad access detected [ 41.091396] [ 41.091615] Memory state around the buggy address: [ 41.092215] ffff88800e2d6380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.093109] ffff88800e2d6400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.093990] >ffff88800e2d6480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 41.094858] ^ [ 41.095626] ffff88800e2d6500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 41.096501] ffff88800e2d6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 41.097377] ================================================================== [ 41.098362] Disabling lock debugging due to kernel taint [ 42.978355] BUG: Bad rss-counter state mm:00000000b7e3b305 type:MM_FILEPAGES val:33 [ 42.979512] BUG: Bad rss-counter state mm:00000000b7e3b305 type:MM_ANONPAGES val:22 [ 43.450947] BUG: Bad rss-counter state mm:00000000715d0c78 type:MM_FILEPAGES val:33 [ 43.452149] BUG: Bad rss-counter state mm:00000000715d0c78 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45086' (ECDSA) to the list of known hosts. 2023/06/20 02:31:25 fuzzer started 2023/06/20 02:31:25 dialing manager at localhost:44161 2023/06/20 02:31:25 checking machine... 2023/06/20 02:31:25 checking revisions... [ 44.173052] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:31:26 testing simple program... [ 44.223572] cgroup: Unknown subsys name 'net' [ 44.261453] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:31:23 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=00007f0957588570 CR3=000000000efae000 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=6a7f4167b7dcaf874049a7c5587e8ae8 XMM02=ec2efd57dc4c00df000000000011e0c8 XMM03=413d82db351512f9000000000011e198 XMM04=d8d112cbdf8e040b00000000000ae988 XMM05=e2208113e672aa6500000000001350d8 XMM06=dfcdbad4f1609c370000000000133c20 XMM07=fb795ef6d65770560000000000124340 XMM08=2c67c8bc2e329bc3000000000011e138 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0ff2906 RBX=ffffffff87f94640 RCX=0000000000000000 RDX=ffff88800f3e8000 RSI=ffffffff83c6316a RDI=ffffffff87f94830 RBP=0000000000000000 RSP=ffff88800c6576a8 R8 =0000000000000005 R9 =00000000000000ff R10=00000000000000c1 R11=000009bd000009bd R12=0000000000000000 R13=00000000000000c1 R14=dffffc0000000000 R15=0000000000000001 RIP=ffffffff83c6317d 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 00007f6754d97900 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=00007f675534e618 CR3=000000000dde0000 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