syzkaller login: [ 38.752100] BUG: Bad rss-counter state mm:000000008dc58974 type:MM_FILEPAGES val:33 [ 38.753097] BUG: Bad rss-counter state mm:000000008dc58974 type:MM_ANONPAGES val:22 [ 38.782770] ================================================================== [ 38.783432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.784163] Read of size 8 at addr ffff88800df8b140 by task sshd/220 [ 38.784779] [ 38.784948] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.785633] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.786401] Call Trace: [ 38.786650] [ 38.786885] dump_stack_lvl+0x91/0xf0 [ 38.787290] print_report+0xcc/0x620 [ 38.787667] ? __virt_addr_valid+0x102/0x340 [ 38.788216] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.788694] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.789174] kasan_report+0xbe/0xf0 [ 38.789563] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.790067] vma_interval_tree_remove+0xc75/0xec0 [ 38.790539] vma_prepare+0xc54/0x11a0 [ 38.790918] __split_vma+0x5af/0x950 [ 38.791298] ? __pfx___split_vma+0x10/0x10 [ 38.791708] ? find_held_lock+0x2c/0x110 [ 38.792117] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.792565] ? lock_is_held_type+0x9f/0x120 [ 38.792981] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.793468] ? mtree_range_walk+0x632/0x900 [ 38.793898] ? mas_walk+0x5c7/0x7c0 [ 38.794292] do_vmi_munmap+0x1f1/0x2b0 [ 38.794715] mmap_region+0x1f9/0x2660 [ 38.795090] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.795414] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.795832] ? __pfx_lock_acquire+0x10/0x10 [ 38.796149] ? __pfx_mmap_region+0x10/0x10 [ 38.796476] ? security_mmap_addr+0x7d/0xa0 [ 38.796790] ? get_unmapped_area+0x1f5/0x3f0 [ 38.797112] do_mmap+0x854/0xf00 [ 38.797372] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.797661] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.797989] ksys_mmap_pgoff+0x3af/0x500 [ 38.798290] do_syscall_64+0x3f/0x90 [ 38.798567] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.798958] RIP: 0033:0x7f2576d2cd82 [ 38.799243] 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 [ 38.800511] RSP: 002b:00007ffc6ef1fab8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.801044] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2576d2cd82 [ 38.801554] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2576166000 [ 38.802058] RBP: 00007f2576166000 R08: 0000000000000009 R09: 0000000000001000 [ 38.802575] R10: 0000000000000812 R11: 0000000000000206 R12: 00005577dea0cec0 [ 38.803085] R13: 00007ffc6ef1fad0 R14: 00007ffc6ef1fb00 R15: 00007ffc6ef1fe60 [ 38.803604] [ 38.803775] [ 38.803899] Allocated by task 213: [ 38.804151] kasan_save_stack+0x22/0x50 [ 38.804460] kasan_set_track+0x25/0x30 [ 38.804747] __kasan_slab_alloc+0x59/0x70 [ 38.805053] kmem_cache_alloc+0x16b/0x370 [ 38.805360] vm_area_dup+0x20/0x160 [ 38.805635] __split_vma+0x170/0x950 [ 38.805905] split_vma+0xc6/0x110 [ 38.806165] mprotect_fixup+0x8d2/0xb30 [ 38.806467] do_mprotect_pkey+0x87e/0xd40 [ 38.806787] __x64_sys_mprotect+0x78/0xc0 [ 38.807096] do_syscall_64+0x3f/0x90 [ 38.807381] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.807764] [ 38.807892] Freed by task 13: [ 38.808114] kasan_save_stack+0x22/0x50 [ 38.808417] kasan_set_track+0x25/0x30 [ 38.808711] kasan_save_free_info+0x2b/0x50 [ 38.809023] __kasan_slab_free+0x10a/0x190 [ 38.809341] kmem_cache_free+0x10d/0x4d0 [ 38.809647] rcu_core+0x8c8/0x2860 [ 38.809909] __do_softirq+0x1b7/0x7d4 [ 38.810193] [ 38.810327] Last potentially related work creation: [ 38.810686] kasan_save_stack+0x22/0x50 [ 38.810984] __kasan_record_aux_stack+0x8e/0xa0 [ 38.811327] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.811723] remove_vma+0x139/0x170 [ 38.811987] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.812320] do_vmi_munmap+0x1f1/0x2b0 [ 38.812607] __vm_munmap+0x138/0x3a0 [ 38.812883] __x64_sys_munmap+0x59/0x80 [ 38.813179] do_syscall_64+0x3f/0x90 [ 38.813467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.813865] [ 38.813992] Second to last potentially related work creation: [ 38.814411] kasan_save_stack+0x22/0x50 [ 38.814729] __kasan_record_aux_stack+0x8e/0xa0 [ 38.815068] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.815455] remove_vma+0x139/0x170 [ 38.815721] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.816048] do_vmi_munmap+0x1f1/0x2b0 [ 38.816341] mmap_region+0x1f9/0x2660 [ 38.816623] do_mmap+0x854/0xf00 [ 38.816879] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.817165] ksys_mmap_pgoff+0x3af/0x500 [ 38.817464] do_syscall_64+0x3f/0x90 [ 38.817746] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.818139] [ 38.818270] The buggy address belongs to the object at ffff88800df8b0e8 [ 38.818270] which belongs to the cache vm_area_struct of size 168 [ 38.819162] The buggy address is located 88 bytes inside of [ 38.819162] freed 168-byte region [ffff88800df8b0e8, ffff88800df8b190) [ 38.820025] [ 38.820153] The buggy address belongs to the physical page: [ 38.820567] page:00000000b1c3775e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdf8b [ 38.821241] memcg:ffff8880098baf01 [ 38.821502] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.821898] page_type: 0xffffffff() [ 38.822169] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b0640 dead000000000004 [ 38.822738] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880098baf01 [ 38.823293] page dumped because: kasan: bad access detected [ 38.823694] [ 38.823819] Memory state around the buggy address: [ 38.824171] ffff88800df8b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.824690] ffff88800df8b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.825205] >ffff88800df8b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.825730] ^ [ 38.826120] ffff88800df8b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.826648] ffff88800df8b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.827171] ================================================================== [ 38.827804] Disabling lock debugging due to kernel taint [ 40.433304] BUG: Bad rss-counter state mm:00000000e15e0ec5 type:MM_FILEPAGES val:33 [ 40.434486] BUG: Bad rss-counter state mm:00000000e15e0ec5 type:MM_ANONPAGES val:22 [ 40.977323] BUG: Bad rss-counter state mm:00000000d9c8f2d3 type:MM_FILEPAGES val:33 [ 40.978508] BUG: Bad rss-counter state mm:00000000d9c8f2d3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11359' (ECDSA) to the list of known hosts. 2023/06/21 07:04:23 fuzzer started 2023/06/21 07:04:24 dialing manager at localhost:36067 2023/06/21 07:04:24 checking machine... 2023/06/21 07:04:24 checking revisions... [ 41.659433] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:04:24 testing simple program... [ 41.698053] cgroup: Unknown subsys name 'net' [ 41.737759] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:04:23 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81809a90 RDX=000000000000809a RSI=000000000000809a RDI=ffffffff86509c58 RBP=ffff88801bdc7788 RSP=ffff88801bdc76c0 R8 =0000000000000000 R9 =ffff88801bdc7770 R10=0000000000038001 R11=000000000000fc0c R12=ffff88801bdc7790 R13=ffff88801bdc7778 R14=ffff88801bdc7771 R15=ffff88801bdc7730 RIP=ffffffff8113077a RFL=00000216 [----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 00007f0943c3b900 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=00007ffc3c16e000 CR3=0000000019df4000 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=0000000000000000 RBX=0000000000000001 RCX=1ffff1100d9e135e RDX=dffffc0000000000 RSI=ffffffff845137d7 RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff864b37a6 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b546d R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130706 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 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=00007f1d1fe8e310 CR3=000000000e4e8000 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=30a07986c2c05482e14db5800c2e9857 XMM02=000000000011b9b0ec2efd57dc4c00df XMM03=0000000000122350cf359a6268ca4043 XMM04=4d075ee18e7492f300000000000ae988 XMM05=19e9129bd510f23500000000001332d8 XMM06=da51b11ab2ca827c0000000000132490 XMM07=e042d86d42eb936e0000000000122628 XMM08=cf359a6268ca4043000000000011ba10 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000