syzkaller login: [ 23.949957] BUG: Bad rss-counter state mm:00000000c96fdeb4 type:MM_FILEPAGES val:33 [ 23.950991] BUG: Bad rss-counter state mm:00000000c96fdeb4 type:MM_ANONPAGES val:22 [ 23.990358] ================================================================== [ 23.991399] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.992510] Read of size 8 at addr ffff88800f598d08 by task sshd/220 [ 23.993428] [ 23.993656] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.994550] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.995587] Call Trace: [ 23.995915] [ 23.996211] dump_stack_lvl+0x91/0xf0 [ 23.996783] print_report+0xcc/0x620 [ 23.997291] ? __virt_addr_valid+0x102/0x340 [ 23.997868] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.998510] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.999140] kasan_report+0xbe/0xf0 [ 23.999617] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.000240] vma_interval_tree_remove+0xc75/0xec0 [ 24.000861] vma_prepare+0xc54/0x11a0 [ 24.001345] __split_vma+0x5af/0x950 [ 24.001829] ? __pfx___split_vma+0x10/0x10 [ 24.002363] ? find_held_lock+0x2c/0x110 [ 24.002892] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.003457] ? lock_is_held_type+0x9f/0x120 [ 24.004015] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.004631] ? mtree_range_walk+0x632/0x900 [ 24.005258] ? mas_walk+0x5c7/0x7c0 [ 24.005819] do_vmi_munmap+0x1f1/0x2b0 [ 24.006398] mmap_region+0x1f9/0x2660 [ 24.006965] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.007572] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.008426] ? __pfx_lock_acquire+0x10/0x10 [ 24.009054] ? __pfx_mmap_region+0x10/0x10 [ 24.009594] ? security_mmap_addr+0x7d/0xa0 [ 24.010126] ? get_unmapped_area+0x1f5/0x3f0 [ 24.010672] do_mmap+0x854/0xf00 [ 24.011117] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.011611] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.012174] ksys_mmap_pgoff+0x3af/0x500 [ 24.012689] do_syscall_64+0x3f/0x90 [ 24.013167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.013815] RIP: 0033:0x7f73abf53d82 [ 24.014272] 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 [ 24.016437] RSP: 002b:00007ffdbcf67438 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.017387] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f73abf53d82 [ 24.018267] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f73ab38d000 [ 24.019155] RBP: 00007f73ab38d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.020028] R10: 0000000000000812 R11: 0000000000000206 R12: 000056153cf0cec0 [ 24.020943] R13: 00007ffdbcf67450 R14: 00007ffdbcf67480 R15: 00007ffdbcf677e0 [ 24.021831] [ 24.022137] [ 24.022364] Allocated by task 213: [ 24.022814] kasan_save_stack+0x22/0x50 [ 24.023337] kasan_set_track+0x25/0x30 [ 24.023870] __kasan_slab_alloc+0x59/0x70 [ 24.024413] kmem_cache_alloc+0x16b/0x370 [ 24.024966] vm_area_dup+0x20/0x160 [ 24.025445] __split_vma+0x170/0x950 [ 24.025934] split_vma+0xc6/0x110 [ 24.026385] mprotect_fixup+0x8d2/0xb30 [ 24.026902] do_mprotect_pkey+0x87e/0xd40 [ 24.027438] __x64_sys_mprotect+0x78/0xc0 [ 24.027979] do_syscall_64+0x3f/0x90 [ 24.028475] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.029149] [ 24.029368] Freed by task 213: [ 24.029776] kasan_save_stack+0x22/0x50 [ 24.030303] kasan_set_track+0x25/0x30 [ 24.030813] kasan_save_free_info+0x2b/0x50 [ 24.031404] __kasan_slab_free+0x10a/0x190 [ 24.031945] kmem_cache_free+0x10d/0x4d0 [ 24.032471] rcu_core+0x8c8/0x2860 [ 24.032939] __do_softirq+0x1b7/0x7d4 [ 24.033436] [ 24.033659] Last potentially related work creation: [ 24.034258] kasan_save_stack+0x22/0x50 [ 24.034782] __kasan_record_aux_stack+0x8e/0xa0 [ 24.035383] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.036047] remove_vma+0x139/0x170 [ 24.036520] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.037125] do_vmi_munmap+0x1f1/0x2b0 [ 24.037631] __vm_munmap+0x138/0x3a0 [ 24.038112] __x64_sys_munmap+0x59/0x80 [ 24.038627] do_syscall_64+0x3f/0x90 [ 24.039118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.039776] [ 24.039996] The buggy address belongs to the object at ffff88800f598cb0 [ 24.039996] which belongs to the cache vm_area_struct of size 168 [ 24.041561] The buggy address is located 88 bytes inside of [ 24.041561] freed 168-byte region [ffff88800f598cb0, ffff88800f598d58) [ 24.043031] [ 24.043251] The buggy address belongs to the physical page: [ 24.043941] page:00000000e097fa3f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf598 [ 24.045085] memcg:ffff88800e5e3a01 [ 24.045533] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.046209] page_type: 0xffffffff() [ 24.046675] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 24.047634] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e5e3a01 [ 24.048579] page dumped because: kasan: bad access detected [ 24.049281] [ 24.049504] Memory state around the buggy address: [ 24.050106] ffff88800f598c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.050993] ffff88800f598c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 24.051884] >ffff88800f598d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 24.052778] ^ [ 24.053230] ffff88800f598d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 24.054118] ffff88800f598e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 24.054998] ================================================================== [ 24.055983] Disabling lock debugging due to kernel taint [ 26.126176] BUG: Bad rss-counter state mm:0000000036419ed7 type:MM_FILEPAGES val:33 [ 26.127799] BUG: Bad rss-counter state mm:0000000036419ed7 type:MM_ANONPAGES val:22 [ 26.643936] BUG: Bad rss-counter state mm:0000000099d83a0d type:MM_FILEPAGES val:33 [ 26.645150] BUG: Bad rss-counter state mm:0000000099d83a0d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2353' (ECDSA) to the list of known hosts. 2023/06/21 06:22:28 fuzzer started 2023/06/21 06:22:29 dialing manager at localhost:36067 2023/06/21 06:22:29 checking machine... 2023/06/21 06:22:29 checking revisions... [ 27.382489] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:22:29 testing simple program... [ 27.435073] cgroup: Unknown subsys name 'net' [ 27.484505] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:28 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=00007f6406517d20 CR3=000000000ce58000 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=2038323a32323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038323a32323a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff813782f8 RBX=0000000000000005 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88806cf09bd0 RBP=dffffc0000000000 RSP=ffff88806cf09b18 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000010 R13=0000000000000000 R14=ffff88806cf09ba8 R15=ffff888019a43730 RIP=ffffffff813ad65d 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 00007fd04c6b2900 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=00007fff4861e000 CR3=0000000016312000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000