syzkaller login: [ 34.845977] BUG: Bad rss-counter state mm:00000000e7bb73b9 type:MM_FILEPAGES val:33 [ 34.847234] BUG: Bad rss-counter state mm:00000000e7bb73b9 type:MM_ANONPAGES val:22 [ 34.992094] ================================================================== [ 34.993023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.993968] Read of size 8 at addr ffff88800d952140 by task sshd/220 [ 34.994857] [ 34.995079] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.995980] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.996969] Call Trace: [ 34.997299] [ 34.997589] dump_stack_lvl+0x91/0xf0 [ 34.998080] print_report+0xcc/0x620 [ 34.998576] ? __virt_addr_valid+0x102/0x340 [ 34.999133] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.999778] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.000396] kasan_report+0xbe/0xf0 [ 35.000879] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.001514] vma_interval_tree_remove+0xc75/0xec0 [ 35.002125] vma_prepare+0xc54/0x11a0 [ 35.002605] __split_vma+0x5af/0x950 [ 35.003084] ? __pfx___split_vma+0x10/0x10 [ 35.003642] ? find_held_lock+0x2c/0x110 [ 35.004170] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.004736] ? lock_is_held_type+0x9f/0x120 [ 35.005283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.005901] ? mtree_range_walk+0x632/0x900 [ 35.006456] ? mas_walk+0x5c7/0x7c0 [ 35.006936] do_vmi_munmap+0x1f1/0x2b0 [ 35.007444] mmap_region+0x1f9/0x2660 [ 35.007933] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.008469] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.009193] ? __pfx_lock_acquire+0x10/0x10 [ 35.009732] ? __pfx_mmap_region+0x10/0x10 [ 35.010277] ? security_mmap_addr+0x7d/0xa0 [ 35.010826] ? get_unmapped_area+0x1f5/0x3f0 [ 35.011396] do_mmap+0x854/0xf00 [ 35.011838] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.012334] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.012907] ksys_mmap_pgoff+0x3af/0x500 [ 35.013430] do_syscall_64+0x3f/0x90 [ 35.013921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.014570] RIP: 0033:0x7f9ae473dd82 [ 35.015034] 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 [ 35.017220] RSP: 002b:00007ffd3b3f9a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.018132] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ae473dd82 [ 35.018991] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ae3b77000 [ 35.019857] RBP: 00007f9ae3b77000 R08: 0000000000000009 R09: 0000000000001000 [ 35.020719] R10: 0000000000000812 R11: 0000000000000206 R12: 000055645c11bec0 [ 35.021573] R13: 00007ffd3b3f9a20 R14: 00007ffd3b3f9a50 R15: 00007ffd3b3f9db0 [ 35.022435] [ 35.022726] [ 35.022946] Allocated by task 213: [ 35.023394] kasan_save_stack+0x22/0x50 [ 35.023909] kasan_set_track+0x25/0x30 [ 35.024405] __kasan_slab_alloc+0x59/0x70 [ 35.024935] kmem_cache_alloc+0x16b/0x370 [ 35.025456] vm_area_dup+0x20/0x160 [ 35.025923] __split_vma+0x170/0x950 [ 35.026397] split_vma+0xc6/0x110 [ 35.026850] mprotect_fixup+0x8d2/0xb30 [ 35.027370] do_mprotect_pkey+0x87e/0xd40 [ 35.027909] __x64_sys_mprotect+0x78/0xc0 [ 35.028428] do_syscall_64+0x3f/0x90 [ 35.028912] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.029561] [ 35.029779] Freed by task 213: [ 35.030174] kasan_save_stack+0x22/0x50 [ 35.030688] kasan_set_track+0x25/0x30 [ 35.031193] kasan_save_free_info+0x2b/0x50 [ 35.031733] __kasan_slab_free+0x10a/0x190 [ 35.032275] kmem_cache_free+0x10d/0x4d0 [ 35.032800] rcu_core+0x8c8/0x2860 [ 35.033254] __do_softirq+0x1b7/0x7d4 [ 35.033746] [ 35.033964] Last potentially related work creation: [ 35.034566] kasan_save_stack+0x22/0x50 [ 35.035075] __kasan_record_aux_stack+0x8e/0xa0 [ 35.035686] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.036339] remove_vma+0x139/0x170 [ 35.036801] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.037367] do_vmi_munmap+0x1f1/0x2b0 [ 35.037854] __vm_munmap+0x138/0x3a0 [ 35.038332] __x64_sys_munmap+0x59/0x80 [ 35.038839] do_syscall_64+0x3f/0x90 [ 35.039328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.039980] [ 35.040201] Second to last potentially related work creation: [ 35.040888] kasan_save_stack+0x22/0x50 [ 35.041390] __kasan_record_aux_stack+0x8e/0xa0 [ 35.041984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.042641] remove_vma+0x139/0x170 [ 35.043102] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.043681] do_vmi_munmap+0x1f1/0x2b0 [ 35.044168] mmap_region+0x1f9/0x2660 [ 35.044659] do_mmap+0x854/0xf00 [ 35.045102] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.045611] ksys_mmap_pgoff+0x3af/0x500 [ 35.046121] do_syscall_64+0x3f/0x90 [ 35.046609] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.047260] [ 35.047493] The buggy address belongs to the object at ffff88800d9520e8 [ 35.047493] which belongs to the cache vm_area_struct of size 168 [ 35.048983] The buggy address is located 88 bytes inside of [ 35.048983] freed 168-byte region [ffff88800d9520e8, ffff88800d952190) [ 35.050388] [ 35.050607] The buggy address belongs to the physical page: [ 35.051264] page:00000000caa51493 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd952 [ 35.052360] memcg:ffff88800efb0d01 [ 35.052798] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.053499] page_type: 0xffffffff() [ 35.053947] raw: 0100000000000200 ffff88800879fc80 ffffea00005a1540 dead000000000007 [ 35.054887] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800efb0d01 [ 35.055818] page dumped because: kasan: bad access detected [ 35.056493] [ 35.056713] Memory state around the buggy address: [ 35.057294] ffff88800d952000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.058157] ffff88800d952080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 35.059035] >ffff88800d952100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.059906] ^ [ 35.060554] ffff88800d952180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.061408] ffff88800d952200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.062268] ================================================================== [ 35.063632] Disabling lock debugging due to kernel taint [ 37.449937] BUG: Bad rss-counter state mm:00000000885f57a4 type:MM_FILEPAGES val:33 [ 37.451093] BUG: Bad rss-counter state mm:00000000885f57a4 type:MM_ANONPAGES val:22 [ 37.880309] BUG: Bad rss-counter state mm:0000000037b00ad2 type:MM_FILEPAGES val:33 [ 37.881464] BUG: Bad rss-counter state mm:0000000037b00ad2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40043' (ECDSA) to the list of known hosts. 2023/06/19 14:51:05 fuzzer started 2023/06/19 14:51:06 dialing manager at localhost:44161 2023/06/19 14:51:06 checking machine... 2023/06/19 14:51:06 checking revisions... [ 38.607583] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:51:06 testing simple program... [ 38.661945] cgroup: Unknown subsys name 'net' [ 38.724764] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:51:01 Registers: info registers vcpu 0 RAX=1ffff110032e4edf RBX=0000000000000003 RCX=0000000000000000 RDX=ffff888018e93680 RSI=ffffffff8449adfc RDI=0000000000000005 RBP=0000000000000003 RSP=ffff888019727438 R8 =0000000000000005 R9 =0000000000000001 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800b866f40 R13=0000000000000000 R14=ffff8880197276f8 R15=dffffc0000000000 RIP=ffffffff8449ae08 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 00007f46f140d900 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=00007f46f13d2008 CR3=0000000019aec000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5e57566d30 CR3=000000000c728000 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=f19c4688254a2c8bc54bfed0148ef499 XMM02=2c67c8bc2e329bc3000000000011f450 XMM03=fb795ef6d65770560000000000123b18 XMM04=cd239975473a36c600000000000ae988 XMM05=19e9129bd510f2350000000000134968 XMM06=5c7ff6626595b55300000000001337d0 XMM07=e042d86d42eb936e0000000000123d98 XMM08=676fc24f18ce59be000000000011f4b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000