syzkaller login: [ 30.811499] BUG: Bad rss-counter state mm:0000000097d391bc type:MM_FILEPAGES val:33 [ 30.812586] BUG: Bad rss-counter state mm:0000000097d391bc type:MM_ANONPAGES val:22 [ 30.991091] ================================================================== [ 30.992063] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.993075] Read of size 8 at addr ffff88800f68c968 by task sshd/220 [ 30.994028] [ 30.994271] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.995185] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.996316] Call Trace: [ 30.996723] [ 30.997061] dump_stack_lvl+0x91/0xf0 [ 30.997654] print_report+0xcc/0x620 [ 30.998230] ? __virt_addr_valid+0x102/0x340 [ 30.998894] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.999633] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.000372] kasan_report+0xbe/0xf0 [ 31.000952] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.001702] vma_interval_tree_remove+0xc75/0xec0 [ 31.002422] vma_prepare+0xc54/0x11a0 [ 31.002993] __split_vma+0x5af/0x950 [ 31.003563] ? __pfx___split_vma+0x10/0x10 [ 31.004197] ? find_held_lock+0x2c/0x110 [ 31.004848] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.005506] ? lock_is_held_type+0x9f/0x120 [ 31.006078] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.006726] ? mtree_range_walk+0x632/0x900 [ 31.007315] ? mas_walk+0x5c7/0x7c0 [ 31.007827] do_vmi_munmap+0x1f1/0x2b0 [ 31.008352] mmap_region+0x1f9/0x2660 [ 31.008884] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.009444] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.010212] ? __pfx_lock_acquire+0x10/0x10 [ 31.010787] ? __pfx_mmap_region+0x10/0x10 [ 31.011357] ? security_mmap_addr+0x7d/0xa0 [ 31.011932] ? get_unmapped_area+0x1f5/0x3f0 [ 31.012534] do_mmap+0x854/0xf00 [ 31.013006] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.013538] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.014146] ksys_mmap_pgoff+0x3af/0x500 [ 31.014693] do_syscall_64+0x3f/0x90 [ 31.015213] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.015916] RIP: 0033:0x7f5203d6fd82 [ 31.016432] 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 [ 31.018767] RSP: 002b:00007ffd33f7d0f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.019753] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5203d6fd82 [ 31.020680] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f52031a9000 [ 31.021604] RBP: 00007f52031a9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.022520] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a076665b20 [ 31.023439] R13: 00007ffd33f7d110 R14: 00007ffd33f7d140 R15: 00007ffd33f7d4a0 [ 31.024362] [ 31.024686] [ 31.024921] Allocated by task 213: [ 31.025379] kasan_save_stack+0x22/0x50 [ 31.025932] kasan_set_track+0x25/0x30 [ 31.026467] __kasan_slab_alloc+0x59/0x70 [ 31.027038] kmem_cache_alloc+0x16b/0x370 [ 31.027601] vm_area_dup+0x20/0x160 [ 31.028088] __split_vma+0x170/0x950 [ 31.028603] split_vma+0xc6/0x110 [ 31.029080] mprotect_fixup+0x8d2/0xb30 [ 31.029626] do_mprotect_pkey+0x87e/0xd40 [ 31.030187] __x64_sys_mprotect+0x78/0xc0 [ 31.030742] do_syscall_64+0x3f/0x90 [ 31.031249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.031935] [ 31.032167] Freed by task 213: [ 31.032591] kasan_save_stack+0x22/0x50 [ 31.033129] kasan_set_track+0x25/0x30 [ 31.033659] kasan_save_free_info+0x2b/0x50 [ 31.034227] __kasan_slab_free+0x10a/0x190 [ 31.034796] kmem_cache_free+0x10d/0x4d0 [ 31.035337] rcu_core+0x8c8/0x2860 [ 31.035806] __do_softirq+0x1b7/0x7d4 [ 31.036318] [ 31.036566] Last potentially related work creation: [ 31.037188] kasan_save_stack+0x22/0x50 [ 31.037741] __kasan_record_aux_stack+0x8e/0xa0 [ 31.038371] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.039078] remove_vma+0x139/0x170 [ 31.039570] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.040181] do_vmi_munmap+0x1f1/0x2b0 [ 31.040733] __vm_munmap+0x138/0x3a0 [ 31.041245] __x64_sys_munmap+0x59/0x80 [ 31.041796] do_syscall_64+0x3f/0x90 [ 31.042318] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.043031] [ 31.043268] The buggy address belongs to the object at ffff88800f68c910 [ 31.043268] which belongs to the cache vm_area_struct of size 168 [ 31.044909] The buggy address is located 88 bytes inside of [ 31.044909] freed 168-byte region [ffff88800f68c910, ffff88800f68c9b8) [ 31.046468] [ 31.046708] The buggy address belongs to the physical page: [ 31.047437] page:00000000caf1699b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf68c [ 31.048642] memcg:ffff88800d665a01 [ 31.049108] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.049818] page_type: 0xffffffff() [ 31.050311] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 31.051325] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d665a01 [ 31.052326] page dumped because: kasan: bad access detected [ 31.053076] [ 31.053311] Memory state around the buggy address: [ 31.053955] ffff88800f68c800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.054900] ffff88800f68c880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.055848] >ffff88800f68c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.056797] ^ [ 31.057663] ffff88800f68c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.058609] ffff88800f68ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.059553] ================================================================== [ 31.060707] Disabling lock debugging due to kernel taint [ 32.988224] BUG: Bad rss-counter state mm:000000008e92585c type:MM_FILEPAGES val:33 [ 32.989160] BUG: Bad rss-counter state mm:000000008e92585c type:MM_ANONPAGES val:22 [ 33.485611] BUG: Bad rss-counter state mm:00000000e517dd88 type:MM_FILEPAGES val:33 [ 33.487071] BUG: Bad rss-counter state mm:00000000e517dd88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52742' (ECDSA) to the list of known hosts. 2023/06/21 04:47:48 fuzzer started 2023/06/21 04:47:49 dialing manager at localhost:36067 2023/06/21 04:47:49 checking machine... 2023/06/21 04:47:49 checking revisions... [ 34.238639] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:47:49 testing simple program... [ 34.290136] cgroup: Unknown subsys name 'net' [ 34.331029] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:48 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=00007ff672b45910 CR3=000000000d76a000 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=931df7a293361c9b564fedc2d027a0fe XMM02=ec2efd57dc4c00df000000000011a250 XMM03=6bf8b550a99e0426000000000011a320 XMM04=18452be3b1ce2c3900000000000ae988 XMM05=19e9129bd510f23500000000001316b8 XMM06=609670c3a656d3a10000000000130520 XMM07=e042d86d42eb936e0000000000121ab8 XMM08=6bf8b550a99e0426000000000011a320 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=ffff888014659b40 RSI=ffffffff814c8467 RDI=ffffffff85652c60 RBP=00007f084af766c3 RSP=ffff8880189cfa20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007f084af766c3 R13=0000000000000000 R14=ffff888014659b40 R15=dffffc0000000000 RIP=ffffffff8135bd4f RFL=00000293 [--S-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 00007f084aa93900 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=00007fff05968000 CR3=0000000016508000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000