syzkaller login: [ 33.132535] sshd (213) used greatest stack depth: 24424 bytes left [ 33.133714] BUG: Bad rss-counter state mm:00000000134da328 type:MM_FILEPAGES val:33 [ 33.134800] BUG: Bad rss-counter state mm:00000000134da328 type:MM_ANONPAGES val:22 [ 33.308883] ================================================================== [ 33.309999] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.310995] Read of size 8 at addr ffff88800eeff968 by task sshd/220 [ 33.311821] [ 33.312051] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.312978] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.314010] Call Trace: [ 33.314352] [ 33.314653] dump_stack_lvl+0x91/0xf0 [ 33.315171] print_report+0xcc/0x620 [ 33.315686] ? __virt_addr_valid+0x102/0x340 [ 33.316276] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.316932] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.317584] kasan_report+0xbe/0xf0 [ 33.318090] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.318768] vma_interval_tree_remove+0xc75/0xec0 [ 33.319430] vma_prepare+0xc54/0x11a0 [ 33.319957] __split_vma+0x5af/0x950 [ 33.320505] ? __pfx___split_vma+0x10/0x10 [ 33.321099] ? find_held_lock+0x2c/0x110 [ 33.321669] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.322286] ? lock_is_held_type+0x9f/0x120 [ 33.322873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.323538] ? mtree_range_walk+0x632/0x900 [ 33.324153] ? mas_walk+0x5c7/0x7c0 [ 33.324677] do_vmi_munmap+0x1f1/0x2b0 [ 33.325222] mmap_region+0x1f9/0x2660 [ 33.325751] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.326322] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.327108] ? __pfx_lock_acquire+0x10/0x10 [ 33.327701] ? __pfx_mmap_region+0x10/0x10 [ 33.328319] ? security_mmap_addr+0x7d/0xa0 [ 33.328902] ? get_unmapped_area+0x1f5/0x3f0 [ 33.329518] do_mmap+0x854/0xf00 [ 33.329998] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.330545] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.331170] ksys_mmap_pgoff+0x3af/0x500 [ 33.331727] do_syscall_64+0x3f/0x90 [ 33.332262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.332967] RIP: 0033:0x7fe5b806fd82 [ 33.333468] 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 [ 33.335808] RSP: 002b:00007ffd02bc6f28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.336814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5b806fd82 [ 33.337748] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5b74a9000 [ 33.338677] RBP: 00007fe5b74a9000 R08: 0000000000000009 R09: 0000000000001000 [ 33.339600] R10: 0000000000000812 R11: 0000000000000206 R12: 00005574a2260ec0 [ 33.340552] R13: 00007ffd02bc6f40 R14: 00007ffd02bc6f70 R15: 00007ffd02bc72d0 [ 33.341493] [ 33.341815] [ 33.342051] Allocated by task 213: [ 33.342521] kasan_save_stack+0x22/0x50 [ 33.343078] kasan_set_track+0x25/0x30 [ 33.343619] __kasan_slab_alloc+0x59/0x70 [ 33.344204] kmem_cache_alloc+0x16b/0x370 [ 33.344773] vm_area_dup+0x20/0x160 [ 33.345279] __split_vma+0x170/0x950 [ 33.345789] split_vma+0xc6/0x110 [ 33.346270] mprotect_fixup+0x8d2/0xb30 [ 33.346818] do_mprotect_pkey+0x87e/0xd40 [ 33.347393] __x64_sys_mprotect+0x78/0xc0 [ 33.347961] do_syscall_64+0x3f/0x90 [ 33.348494] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.349197] [ 33.349432] Freed by task 213: [ 33.349862] kasan_save_stack+0x22/0x50 [ 33.350413] kasan_set_track+0x25/0x30 [ 33.350989] kasan_save_free_info+0x2b/0x50 [ 33.351583] __kasan_slab_free+0x10a/0x190 [ 33.352178] kmem_cache_free+0x10d/0x4d0 [ 33.352739] rcu_core+0x8c8/0x2860 [ 33.353237] __do_softirq+0x1b7/0x7d4 [ 33.353760] [ 33.353994] Last potentially related work creation: [ 33.354640] kasan_save_stack+0x22/0x50 [ 33.355194] __kasan_record_aux_stack+0x8e/0xa0 [ 33.355828] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.356549] remove_vma+0x139/0x170 [ 33.357049] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.357665] do_vmi_munmap+0x1f1/0x2b0 [ 33.358196] __vm_munmap+0x138/0x3a0 [ 33.358706] __x64_sys_munmap+0x59/0x80 [ 33.359253] do_syscall_64+0x3f/0x90 [ 33.359772] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.360504] [ 33.360739] Second to last potentially related work creation: [ 33.361494] kasan_save_stack+0x22/0x50 [ 33.362045] __kasan_record_aux_stack+0x8e/0xa0 [ 33.362675] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.363380] remove_vma+0x139/0x170 [ 33.363882] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.364509] do_vmi_munmap+0x1f1/0x2b0 [ 33.365057] mmap_region+0x1f9/0x2660 [ 33.365586] do_mmap+0x854/0xf00 [ 33.366059] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.366598] ksys_mmap_pgoff+0x3af/0x500 [ 33.367159] do_syscall_64+0x3f/0x90 [ 33.367685] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.368407] [ 33.368644] The buggy address belongs to the object at ffff88800eeff910 [ 33.368644] which belongs to the cache vm_area_struct of size 168 [ 33.370256] The buggy address is located 88 bytes inside of [ 33.370256] freed 168-byte region [ffff88800eeff910, ffff88800eeff9b8) [ 33.371806] [ 33.372042] The buggy address belongs to the physical page: [ 33.372781] page:00000000d25fccaf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeeff [ 33.373963] memcg:ffff88800e6f1c01 [ 33.374432] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.375142] page_type: 0xffffffff() [ 33.375639] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 33.376662] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e6f1c01 [ 33.377664] page dumped because: kasan: bad access detected [ 33.378387] [ 33.378627] Memory state around the buggy address: [ 33.379268] ffff88800eeff800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 33.380221] ffff88800eeff880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 33.381168] >ffff88800eeff900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.382102] ^ [ 33.382991] ffff88800eeff980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 33.383928] ffff88800eeffa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.384876] ================================================================== [ 33.385940] Disabling lock debugging due to kernel taint [ 35.403158] BUG: Bad rss-counter state mm:00000000aff0d9f1 type:MM_FILEPAGES val:33 [ 35.404352] BUG: Bad rss-counter state mm:00000000aff0d9f1 type:MM_ANONPAGES val:22 [ 35.865652] BUG: Bad rss-counter state mm:000000006046837c type:MM_FILEPAGES val:33 [ 35.866830] BUG: Bad rss-counter state mm:000000006046837c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2264' (ECDSA) to the list of known hosts. 2023/06/19 23:49:45 fuzzer started 2023/06/19 23:49:45 dialing manager at localhost:44161 2023/06/19 23:49:45 checking machine... 2023/06/19 23:49:45 checking revisions... [ 36.516998] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:49:45 testing simple program... [ 36.554735] cgroup: Unknown subsys name 'net' [ 36.608001] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:49:42 Registers: info registers vcpu 0 RAX=1ffffffff0c09a5b RBX=ffffffff8604d2dc RCX=ffffffff84506c7e RDX=0000000000000005 RSI=ffffffff864b0222 RDI=ffffffff8604d2b8 RBP=ffffffff8604d2d4 RSP=ffff888017eb7650 R8 =ffffffff864b0222 R9 =ffff888017eb7748 R10=0000000000038001 R11=00000000000b4fb9 R12=ffffffff8604d2e8 R13=ffffffff8604d2b8 R14=ffffffff8604d2d0 R15=dffffc0000000000 RIP=ffffffff8112fc7a 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 00007f3be7ac7900 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=00007fff3e8ab000 CR3=000000000ea0c000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007f36207dc7f0 CR3=000000000ca2e000 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=71c03e826ed216b2594553a7746561fd XMM02=000000000011e0f8eff9b2d0a8fce9cb XMM03=000000000011e1c82c67c8bc2e329bc3 XMM04=fc001f1340ad11f800000000000ae988 XMM05=19e9129bd510f2350000000000135fc0 XMM06=13ff49474034461b0000000000134e28 XMM07=e042d86d42eb936e00000000001251c8 XMM08=ed5656afcb6304de000000000011e1c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000