syzkaller login: [ 48.587289] BUG: Bad rss-counter state mm:00000000c08ac29a type:MM_FILEPAGES val:33 [ 48.588944] BUG: Bad rss-counter state mm:00000000c08ac29a type:MM_ANONPAGES val:22 [ 48.646635] ================================================================== [ 48.647598] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 48.648606] Read of size 8 at addr ffff888016ad5968 by task sshd/226 [ 48.649638] [ 48.649877] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 48.650799] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 48.651885] Call Trace: [ 48.652226] [ 48.652529] dump_stack_lvl+0x91/0xf0 [ 48.653098] print_report+0xcc/0x620 [ 48.653621] ? __virt_addr_valid+0x102/0x340 [ 48.654218] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.654869] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.655528] kasan_report+0xbe/0xf0 [ 48.656029] ? vma_interval_tree_remove+0xc75/0xec0 [ 48.656723] vma_interval_tree_remove+0xc75/0xec0 [ 48.657361] vma_prepare+0xc54/0x11a0 [ 48.657868] __split_vma+0x5af/0x950 [ 48.658370] ? __pfx___split_vma+0x10/0x10 [ 48.658932] ? find_held_lock+0x2c/0x110 [ 48.659483] do_vmi_align_munmap+0x2ba/0x11f0 [ 48.660081] ? lock_is_held_type+0x9f/0x120 [ 48.660688] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 48.661335] ? mtree_range_walk+0x632/0x900 [ 48.661921] ? mas_walk+0x5c7/0x7c0 [ 48.662422] do_vmi_munmap+0x1f1/0x2b0 [ 48.662941] mmap_region+0x1f9/0x2660 [ 48.663450] ? vm_mmap_pgoff+0x15c/0x3a0 [ 48.663989] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 48.664786] ? __pfx_lock_acquire+0x10/0x10 [ 48.665355] ? __pfx_mmap_region+0x10/0x10 [ 48.665913] ? security_mmap_addr+0x7d/0xa0 [ 48.666480] ? get_unmapped_area+0x1f5/0x3f0 [ 48.667066] do_mmap+0x854/0xf00 [ 48.667536] vm_mmap_pgoff+0x1a6/0x3a0 [ 48.668060] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 48.668686] ksys_mmap_pgoff+0x3af/0x500 [ 48.669225] do_syscall_64+0x3f/0x90 [ 48.669730] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.670414] RIP: 0033:0x7ff035f00d82 [ 48.670897] 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 [ 48.673204] RSP: 002b:00007fffc39c5368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 48.674164] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff035f00d82 [ 48.675070] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff03533a000 [ 48.675967] RBP: 00007ff03533a000 R08: 0000000000000009 R09: 0000000000001000 [ 48.676897] R10: 0000000000000812 R11: 0000000000000206 R12: 00005556956c2b20 [ 48.677794] R13: 00007fffc39c5380 R14: 00007fffc39c53b0 R15: 00007fffc39c5710 [ 48.678700] [ 48.679009] [ 48.679239] Allocated by task 219: [ 48.679696] kasan_save_stack+0x22/0x50 [ 48.680235] kasan_set_track+0x25/0x30 [ 48.680850] __kasan_slab_alloc+0x59/0x70 [ 48.681409] kmem_cache_alloc+0x16b/0x370 [ 48.681959] vm_area_dup+0x20/0x160 [ 48.682446] __split_vma+0x170/0x950 [ 48.682942] split_vma+0xc6/0x110 [ 48.683407] mprotect_fixup+0x8d2/0xb30 [ 48.683941] do_mprotect_pkey+0x87e/0xd40 [ 48.684494] __x64_sys_mprotect+0x78/0xc0 [ 48.685084] do_syscall_64+0x3f/0x90 [ 48.685594] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.686279] [ 48.686512] Freed by task 219: [ 48.686932] kasan_save_stack+0x22/0x50 [ 48.687470] kasan_set_track+0x25/0x30 [ 48.687997] kasan_save_free_info+0x2b/0x50 [ 48.688561] __kasan_slab_free+0x10a/0x190 [ 48.689154] kmem_cache_free+0x10d/0x4d0 [ 48.689697] rcu_core+0x8c8/0x2860 [ 48.690169] __do_softirq+0x1b7/0x7d4 [ 48.690743] [ 48.690976] Last potentially related work creation: [ 48.691599] kasan_save_stack+0x22/0x50 [ 48.692135] __kasan_record_aux_stack+0x8e/0xa0 [ 48.692775] __call_rcu_common.constprop.0+0x6a/0xb90 [ 48.693470] remove_vma+0x139/0x170 [ 48.693949] do_vmi_align_munmap+0xd4a/0x11f0 [ 48.694547] do_vmi_munmap+0x1f1/0x2b0 [ 48.695066] __vm_munmap+0x138/0x3a0 [ 48.695570] __x64_sys_munmap+0x59/0x80 [ 48.696098] do_syscall_64+0x3f/0x90 [ 48.696616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 48.697306] [ 48.697541] The buggy address belongs to the object at ffff888016ad5910 [ 48.697541] which belongs to the cache vm_area_struct of size 168 [ 48.699113] The buggy address is located 88 bytes inside of [ 48.699113] freed 168-byte region [ffff888016ad5910, ffff888016ad59b8) [ 48.700647] [ 48.700888] The buggy address belongs to the physical page: [ 48.701593] page:000000000e6f1353 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ad5 [ 48.702759] memcg:ffff888019f41401 [ 48.703209] flags: 0x100000000000200(slab|node=0|zone=1) [ 48.703901] page_type: 0xffffffff() [ 48.704381] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 48.705395] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f41401 [ 48.706355] page dumped because: kasan: bad access detected [ 48.707063] [ 48.707297] Memory state around the buggy address: [ 48.707923] ffff888016ad5800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 48.708880] ffff888016ad5880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 48.709799] >ffff888016ad5900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.710710] ^ [ 48.711549] ffff888016ad5980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 48.712476] ffff888016ad5a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 48.713437] ================================================================== [ 48.714468] Disabling lock debugging due to kernel taint [ 50.985118] BUG: Bad rss-counter state mm:00000000326e41e7 type:MM_FILEPAGES val:33 [ 50.986316] BUG: Bad rss-counter state mm:00000000326e41e7 type:MM_ANONPAGES val:22 [ 51.476197] BUG: Bad rss-counter state mm:000000001ad0ed0c type:MM_FILEPAGES val:33 [ 51.477293] BUG: Bad rss-counter state mm:000000001ad0ed0c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39032' (ECDSA) to the list of known hosts. 2023/06/19 23:59:42 fuzzer started 2023/06/19 23:59:43 dialing manager at localhost:44161 2023/06/19 23:59:43 checking machine... 2023/06/19 23:59:43 checking revisions... [ 52.183921] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:59:43 testing simple program... [ 52.245538] cgroup: Unknown subsys name 'net' [ 52.339868] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:59:32 Registers: info registers vcpu 0 RAX=00000000ffffffff RBX=0000000000000000 RCX=0000000000000001 RDX=1ffffd4000066246 RSI=ffffea0000331280 RDI=ffffea0000331230 RBP=ffffea0000331200 RSP=ffff888008d7fb20 R8 =0000000000000000 R9 =ffff88807ffdc600 R10=ffffea00003312f0 R11=000000000000cc4b R12=0000000000000001 R13=ffffea0000331280 R14=ffffea0000331280 R15=ffff88807ffdc500 RIP=ffffffff81789b6d RFL=00000046 [---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 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=00007f3e9a6e7550 CR3=000000000c5ee000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c77a661022c702fb00000000000ae988 XMM05=ebf827ee7829e4bc0000000000134f88 XMM06=c52df73ed3bdbd9200000000001339b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000985aa102 RBX=000000007bcef067 RCX=ffff88801d01fa30 RDX=000000000000000f RSI=0000000000000012 RDI=0000000029dd1d4f RBP=0000000000000000 RSP=ffff88801d01f998 R8 =00000000ae0e2ce7 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffff88801d01fa00 R15=000000000000000f RIP=ffffffff82270e97 RFL=00000296 [--S-AP-] 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 00007f33ade03900 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=00007ffeff909000 CR3=000000001622e000 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=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