syzkaller login: [ 38.754820] BUG: Bad rss-counter state mm:00000000149d679a type:MM_FILEPAGES val:33 [ 38.755949] BUG: Bad rss-counter state mm:00000000149d679a type:MM_ANONPAGES val:22 [ 38.949120] ================================================================== [ 38.950088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.951097] Read of size 8 at addr ffff888019c77b38 by task sshd/226 [ 38.951898] [ 38.952134] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.953057] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.954086] Call Trace: [ 38.954422] [ 38.954725] dump_stack_lvl+0x91/0xf0 [ 38.955242] print_report+0xcc/0x620 [ 38.955752] ? __virt_addr_valid+0x102/0x340 [ 38.956326] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.956983] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.957626] kasan_report+0xbe/0xf0 [ 38.958124] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.958779] vma_interval_tree_remove+0xc75/0xec0 [ 38.959423] vma_prepare+0xc54/0x11a0 [ 38.959921] __split_vma+0x5af/0x950 [ 38.960424] ? __pfx___split_vma+0x10/0x10 [ 38.961004] ? find_held_lock+0x2c/0x110 [ 38.961560] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.962167] ? lock_is_held_type+0x9f/0x120 [ 38.962734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.963371] ? mtree_range_walk+0x632/0x900 [ 38.963943] ? mas_walk+0x5c7/0x7c0 [ 38.964445] do_vmi_munmap+0x1f1/0x2b0 [ 38.964961] mmap_region+0x1f9/0x2660 [ 38.965465] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.966004] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.966757] ? __pfx_lock_acquire+0x10/0x10 [ 38.967308] ? __pfx_mmap_region+0x10/0x10 [ 38.967863] ? security_mmap_addr+0x7d/0xa0 [ 38.968418] ? get_unmapped_area+0x1f5/0x3f0 [ 38.969018] do_mmap+0x854/0xf00 [ 38.969468] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.969981] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.970564] ksys_mmap_pgoff+0x3af/0x500 [ 38.971085] do_syscall_64+0x3f/0x90 [ 38.971581] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.972242] RIP: 0033:0x7f1da5e35d82 [ 38.972718] 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 [ 38.974892] RSP: 002b:00007ffedac450f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.975817] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1da5e35d82 [ 38.976694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1da526f000 [ 38.977558] RBP: 00007f1da526f000 R08: 0000000000000009 R09: 0000000000001000 [ 38.978435] R10: 0000000000000812 R11: 0000000000000206 R12: 00005582f42baf70 [ 38.979318] R13: 00007ffedac45110 R14: 00007ffedac45140 R15: 00007ffedac454a0 [ 38.980198] [ 38.980494] [ 38.980738] Allocated by task 219: [ 38.981181] kasan_save_stack+0x22/0x50 [ 38.981702] kasan_set_track+0x25/0x30 [ 38.982211] __kasan_slab_alloc+0x59/0x70 [ 38.982750] kmem_cache_alloc+0x16b/0x370 [ 38.983287] vm_area_dup+0x20/0x160 [ 38.983750] __split_vma+0x170/0x950 [ 38.984230] split_vma+0xc6/0x110 [ 38.984684] mprotect_fixup+0x8d2/0xb30 [ 38.985208] do_mprotect_pkey+0x87e/0xd40 [ 38.985746] __x64_sys_mprotect+0x78/0xc0 [ 38.986271] do_syscall_64+0x3f/0x90 [ 38.986762] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.987423] [ 38.987643] Freed by task 219: [ 38.988044] kasan_save_stack+0x22/0x50 [ 38.988560] kasan_set_track+0x25/0x30 [ 38.989085] kasan_save_free_info+0x2b/0x50 [ 38.989631] __kasan_slab_free+0x10a/0x190 [ 38.990174] kmem_cache_free+0x10d/0x4d0 [ 38.990697] rcu_core+0x8c8/0x2860 [ 38.991149] __do_softirq+0x1b7/0x7d4 [ 38.991633] [ 38.991854] Last potentially related work creation: [ 38.992460] kasan_save_stack+0x22/0x50 [ 38.992976] __kasan_record_aux_stack+0x8e/0xa0 [ 38.993560] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.994215] remove_vma+0x139/0x170 [ 38.994677] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.995244] do_vmi_munmap+0x1f1/0x2b0 [ 38.995742] __vm_munmap+0x138/0x3a0 [ 38.996229] __x64_sys_munmap+0x59/0x80 [ 38.996742] do_syscall_64+0x3f/0x90 [ 38.997223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.997877] [ 38.998097] The buggy address belongs to the object at ffff888019c77ae0 [ 38.998097] which belongs to the cache vm_area_struct of size 168 [ 38.999577] The buggy address is located 88 bytes inside of [ 38.999577] freed 168-byte region [ffff888019c77ae0, ffff888019c77b88) [ 39.001012] [ 39.001234] The buggy address belongs to the physical page: [ 39.001907] page:000000004e15ebd1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c77 [ 39.003011] memcg:ffff88800c7f2901 [ 39.003446] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.004149] page_type: 0xffffffff() [ 39.004608] raw: 0100000000000200 ffff8880087a0c80 0000000000000000 0000000000000001 [ 39.005542] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c7f2901 [ 39.006455] page dumped because: kasan: bad access detected [ 39.007120] [ 39.007340] Memory state around the buggy address: [ 39.007921] ffff888019c77a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.008800] ffff888019c77a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.009656] >ffff888019c77b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.010514] ^ [ 39.011126] ffff888019c77b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.011988] ffff888019c77c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.012872] ================================================================== [ 39.014216] Disabling lock debugging due to kernel taint [ 40.930522] BUG: Bad rss-counter state mm:00000000d19e3c22 type:MM_FILEPAGES val:33 [ 40.931708] BUG: Bad rss-counter state mm:00000000d19e3c22 type:MM_ANONPAGES val:22 [ 41.394108] BUG: Bad rss-counter state mm:00000000b7fa1650 type:MM_FILEPAGES val:33 [ 41.394869] BUG: Bad rss-counter state mm:00000000b7fa1650 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43938' (ECDSA) to the list of known hosts. 2023/06/21 00:58:58 fuzzer started 2023/06/21 00:58:58 dialing manager at localhost:36067 2023/06/21 00:58:58 checking machine... 2023/06/21 00:58:58 checking revisions... [ 42.015212] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:58:58 testing simple program... [ 42.068475] cgroup: Unknown subsys name 'net' [ 42.113833] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:58:58 Registers: info registers vcpu 0 RAX=1ffff110033ccfdb RBX=ffff888019e67ea8 RCX=1ffff11001a160ac RDX=dffffc0000000000 RSI=ffff888015a2b200 RDI=ffff888019e67ed8 RBP=ffff88800cfb0408 RSP=ffff88800f0c7cb8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888015a2a200 R13=0000000000000000 R14=ffff88801a0243d8 R15=ffff88801a024390 RIP=ffffffff8184767e 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 00007f996bb4e900 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=00007ffef33ec000 CR3=000000000bf2c000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007fbea22d3e40 CR3=0000000013676000 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=7f813479a9682c83b34629a4e6457105 XMM02=000000000011b508ec2efd57dc4c00df XMM03=00000000001222b04f39f76150731ad8 XMM04=9df5008ed6fe1f8d00000000000ae988 XMM05=6860aeb314f8829d0000000000131dc0 XMM06=b7c98e1aeeb18aa50000000000130f98 XMM07=e042d86d42eb936e0000000000122588 XMM08=4f39f76150731ad8000000000011b568 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000