syzkaller login: [ 31.312412] BUG: Bad rss-counter state mm:00000000757af682 type:MM_FILEPAGES val:33 [ 31.313784] BUG: Bad rss-counter state mm:00000000757af682 type:MM_ANONPAGES val:22 [ 31.353045] ================================================================== [ 31.353998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.354910] Read of size 8 at addr ffff88800cb044e0 by task sshd/220 [ 31.355672] [ 31.355886] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.356717] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.357664] Call Trace: [ 31.357973] [ 31.358253] dump_stack_lvl+0x91/0xf0 [ 31.358731] print_report+0xcc/0x620 [ 31.359225] ? __virt_addr_valid+0x102/0x340 [ 31.359762] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360361] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.360964] kasan_report+0xbe/0xf0 [ 31.361428] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.362033] vma_interval_tree_remove+0xc75/0xec0 [ 31.362625] vma_prepare+0xc54/0x11a0 [ 31.363100] __split_vma+0x5af/0x950 [ 31.363568] ? __pfx___split_vma+0x10/0x10 [ 31.364083] ? find_held_lock+0x2c/0x110 [ 31.364590] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.365139] ? lock_is_held_type+0x9f/0x120 [ 31.365666] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.366253] ? mtree_range_walk+0x632/0x900 [ 31.366796] ? mas_walk+0x5c7/0x7c0 [ 31.367265] do_vmi_munmap+0x1f1/0x2b0 [ 31.367746] mmap_region+0x1f9/0x2660 [ 31.368217] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.368717] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.369407] ? __pfx_lock_acquire+0x10/0x10 [ 31.369930] ? __pfx_mmap_region+0x10/0x10 [ 31.370448] ? security_mmap_addr+0x7d/0xa0 [ 31.370966] ? get_unmapped_area+0x1f5/0x3f0 [ 31.371523] do_mmap+0x854/0xf00 [ 31.371954] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.372437] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.372984] ksys_mmap_pgoff+0x3af/0x500 [ 31.373478] do_syscall_64+0x3f/0x90 [ 31.373949] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.374577] RIP: 0033:0x7f43be9ead82 [ 31.375019] 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 [ 31.377086] RSP: 002b:00007ffd0bef59c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.377962] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f43be9ead82 [ 31.378784] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f43bde24000 [ 31.379757] RBP: 00007f43bde24000 R08: 0000000000000009 R09: 0000000000001000 [ 31.380581] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564ecf2d0b20 [ 31.381405] R13: 00007ffd0bef59e0 R14: 00007ffd0bef5a10 R15: 00007ffd0bef5d70 [ 31.382243] [ 31.382526] [ 31.382737] Allocated by task 213: [ 31.383172] kasan_save_stack+0x22/0x50 [ 31.383663] kasan_set_track+0x25/0x30 [ 31.384145] __kasan_slab_alloc+0x59/0x70 [ 31.384655] kmem_cache_alloc+0x16b/0x370 [ 31.385156] vm_area_dup+0x20/0x160 [ 31.385596] __split_vma+0x170/0x950 [ 31.386053] split_vma+0xc6/0x110 [ 31.386483] mprotect_fixup+0x8d2/0xb30 [ 31.386974] do_mprotect_pkey+0x87e/0xd40 [ 31.387492] __x64_sys_mprotect+0x78/0xc0 [ 31.387997] do_syscall_64+0x3f/0x90 [ 31.388460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.389089] [ 31.389298] Freed by task 213: [ 31.389679] kasan_save_stack+0x22/0x50 [ 31.390168] kasan_set_track+0x25/0x30 [ 31.390647] kasan_save_free_info+0x2b/0x50 [ 31.391180] __kasan_slab_free+0x10a/0x190 [ 31.391698] kmem_cache_free+0x10d/0x4d0 [ 31.392189] rcu_core+0x8c8/0x2860 [ 31.392626] __do_softirq+0x1b7/0x7d4 [ 31.393095] [ 31.393307] Last potentially related work creation: [ 31.393873] kasan_save_stack+0x22/0x50 [ 31.394359] __kasan_record_aux_stack+0x8e/0xa0 [ 31.394915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.395542] remove_vma+0x139/0x170 [ 31.395979] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.396519] do_vmi_munmap+0x1f1/0x2b0 [ 31.396989] __vm_munmap+0x138/0x3a0 [ 31.397440] __x64_sys_munmap+0x59/0x80 [ 31.397924] do_syscall_64+0x3f/0x90 [ 31.398384] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.399004] [ 31.399220] The buggy address belongs to the object at ffff88800cb04488 [ 31.399220] which belongs to the cache vm_area_struct of size 168 [ 31.400640] The buggy address is located 88 bytes inside of [ 31.400640] freed 168-byte region [ffff88800cb04488, ffff88800cb04530) [ 31.401997] [ 31.402206] The buggy address belongs to the physical page: [ 31.402841] page:0000000055aaee51 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xcb04 [ 31.403900] memcg:ffff88800c647a01 [ 31.404320] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.404942] page_type: 0xffffffff() [ 31.405387] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.406287] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c647a01 [ 31.407175] page dumped because: kasan: bad access detected [ 31.407814] [ 31.408023] Memory state around the buggy address: [ 31.408592] ffff88800cb04380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.409420] ffff88800cb04400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 31.410250] >ffff88800cb04480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.411088] ^ [ 31.411825] ffff88800cb04500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 31.412646] ffff88800cb04580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.413466] ================================================================== [ 31.414561] Disabling lock debugging due to kernel taint [ 33.430044] BUG: Bad rss-counter state mm:000000005e201786 type:MM_FILEPAGES val:33 [ 33.431602] BUG: Bad rss-counter state mm:000000005e201786 type:MM_ANONPAGES val:22 [ 33.913635] BUG: Bad rss-counter state mm:000000008765faae type:MM_FILEPAGES val:33 [ 33.915005] BUG: Bad rss-counter state mm:000000008765faae type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25656' (ECDSA) to the list of known hosts. 2023/06/20 20:41:12 fuzzer started 2023/06/20 20:41:13 dialing manager at localhost:36067 2023/06/20 20:41:13 checking machine... 2023/06/20 20:41:13 checking revisions... [ 34.653584] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:41:13 testing simple program... [ 34.704169] cgroup: Unknown subsys name 'net' [ 34.767181] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:41:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fb4bcadf820 CR3=000000000c6fc000 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=bc69a270f77a29a4a2460b21503f1f56 XMM02=000000000011d9a8eff9b2d0a8fce9cb XMM03=000000000011da782c67c8bc2e329bc3 XMM04=e8e39f2757d3332600000000000ae988 XMM05=19e9129bd510f2350000000000131f88 XMM06=4fda316b135da52b0000000000131e10 XMM07=e042d86d42eb936e0000000000122328 XMM08=36d83ae09ba030c8000000000011da78 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800fc678b0 RCX=0000000000000001 RDX=1ffff11001f8cf2f RSI=ffffffff83861243 RDI=ffff88800fc678bc RBP=ffff88800fc67978 RSP=ffff88800fc677c8 R8 =0000000000000001 R9 =ffff88800fc67828 R10=0000000000038001 R11=000000000008b06b R12=ffff88800fc678b0 R13=0000000000000000 R14=ffff88800f1b0000 R15=0000000000092cc0 RIP=ffffffff813ad543 RFL=00000212 [----A--] 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 00007f714e963900 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=00007ffce59dd000 CR3=000000001ce64000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000