syzkaller login: [ 30.815990] BUG: Bad rss-counter state mm:00000000d42cffca type:MM_FILEPAGES val:33 [ 30.817721] BUG: Bad rss-counter state mm:00000000d42cffca type:MM_ANONPAGES val:22 [ 30.982495] ================================================================== [ 30.983447] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.984416] Read of size 8 at addr ffff888014767310 by task sshd/220 [ 30.985204] [ 30.985500] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.986400] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.987421] Call Trace: [ 30.987775] [ 30.988082] dump_stack_lvl+0x91/0xf0 [ 30.988591] print_report+0xcc/0x620 [ 30.989093] ? __virt_addr_valid+0x102/0x340 [ 30.989643] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990268] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.990910] kasan_report+0xbe/0xf0 [ 30.991390] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.992008] vma_interval_tree_remove+0xc75/0xec0 [ 30.992642] vma_prepare+0xc54/0x11a0 [ 30.993148] __split_vma+0x5af/0x950 [ 30.993631] ? __pfx___split_vma+0x10/0x10 [ 30.994160] ? find_held_lock+0x2c/0x110 [ 30.994697] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.995264] ? lock_is_held_type+0x9f/0x120 [ 30.995830] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.996452] ? mtree_range_walk+0x632/0x900 [ 30.997014] ? mas_walk+0x5c7/0x7c0 [ 30.997491] do_vmi_munmap+0x1f1/0x2b0 [ 30.997992] mmap_region+0x1f9/0x2660 [ 30.998488] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.999022] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.999757] ? __pfx_lock_acquire+0x10/0x10 [ 31.000292] ? __pfx_mmap_region+0x10/0x10 [ 31.000842] ? security_mmap_addr+0x7d/0xa0 [ 31.001388] ? get_unmapped_area+0x1f5/0x3f0 [ 31.001944] do_mmap+0x854/0xf00 [ 31.002389] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.002900] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.003456] ksys_mmap_pgoff+0x3af/0x500 [ 31.003974] do_syscall_64+0x3f/0x90 [ 31.004454] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.005108] RIP: 0033:0x7fcc7959ed82 [ 31.005559] 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 [ 31.007682] RSP: 002b:00007ffc22f9e108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.008598] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc7959ed82 [ 31.009450] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc789d8000 [ 31.010311] RBP: 00007fcc789d8000 R08: 0000000000000009 R09: 0000000000001000 [ 31.011188] R10: 0000000000000812 R11: 0000000000000206 R12: 00005643803b2ec0 [ 31.012060] R13: 00007ffc22f9e120 R14: 00007ffc22f9e150 R15: 00007ffc22f9e4b0 [ 31.012923] [ 31.013214] [ 31.013436] Allocated by task 213: [ 31.013870] kasan_save_stack+0x22/0x50 [ 31.014383] kasan_set_track+0x25/0x30 [ 31.014892] __kasan_slab_alloc+0x59/0x70 [ 31.015422] kmem_cache_alloc+0x16b/0x370 [ 31.015946] vm_area_dup+0x20/0x160 [ 31.016401] __split_vma+0x170/0x950 [ 31.016880] split_vma+0xc6/0x110 [ 31.017326] mprotect_fixup+0x8d2/0xb30 [ 31.017834] do_mprotect_pkey+0x87e/0xd40 [ 31.018354] __x64_sys_mprotect+0x78/0xc0 [ 31.018893] do_syscall_64+0x3f/0x90 [ 31.019371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.020008] [ 31.020220] Freed by task 203: [ 31.020615] kasan_save_stack+0x22/0x50 [ 31.021118] kasan_set_track+0x25/0x30 [ 31.021609] kasan_save_free_info+0x2b/0x50 [ 31.022139] __kasan_slab_free+0x10a/0x190 [ 31.022675] kmem_cache_free+0x10d/0x4d0 [ 31.023189] rcu_core+0x8c8/0x2860 [ 31.023631] __do_softirq+0x1b7/0x7d4 [ 31.024112] [ 31.024325] Last potentially related work creation: [ 31.024906] kasan_save_stack+0x22/0x50 [ 31.025409] __kasan_record_aux_stack+0x8e/0xa0 [ 31.025988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.026643] remove_vma+0x139/0x170 [ 31.027097] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.027658] do_vmi_munmap+0x1f1/0x2b0 [ 31.028141] __vm_munmap+0x138/0x3a0 [ 31.028607] __x64_sys_munmap+0x59/0x80 [ 31.029107] do_syscall_64+0x3f/0x90 [ 31.029579] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.030215] [ 31.030428] The buggy address belongs to the object at ffff8880147672b8 [ 31.030428] which belongs to the cache vm_area_struct of size 168 [ 31.031924] The buggy address is located 88 bytes inside of [ 31.031924] freed 168-byte region [ffff8880147672b8, ffff888014767360) [ 31.033327] [ 31.033543] The buggy address belongs to the physical page: [ 31.034198] page:00000000bef826c4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14767 [ 31.035312] memcg:ffff888019dcb601 [ 31.035743] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.036403] page_type: 0xffffffff() [ 31.036852] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.037773] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019dcb601 [ 31.038691] page dumped because: kasan: bad access detected [ 31.039353] [ 31.039568] Memory state around the buggy address: [ 31.040150] ffff888014767200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.041007] ffff888014767280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.041859] >ffff888014767300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.042715] ^ [ 31.043187] ffff888014767380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.044040] ffff888014767400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.044890] ================================================================== [ 31.045878] Disabling lock debugging due to kernel taint [ 32.850607] BUG: Bad rss-counter state mm:0000000060d94ad8 type:MM_FILEPAGES val:33 [ 32.851270] BUG: Bad rss-counter state mm:0000000060d94ad8 type:MM_ANONPAGES val:22 [ 33.233764] BUG: Bad rss-counter state mm:00000000acc2417a type:MM_FILEPAGES val:33 [ 33.234525] BUG: Bad rss-counter state mm:00000000acc2417a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62717' (ECDSA) to the list of known hosts. 2023/06/21 06:37:22 fuzzer started 2023/06/21 06:37:22 dialing manager at localhost:36067 2023/06/21 06:37:23 checking machine... 2023/06/21 06:37:23 checking revisions... [ 33.874216] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:37:23 testing simple program... [ 33.923630] cgroup: Unknown subsys name 'net' [ 33.980372] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:37:22 Registers: info registers vcpu 0 RAX=00000016c9b15794 RBX=0000000000000000 RCX=00000000000006e0 RDX=0000000000000016 RSI=ffff88806ce28140 RDI=0000000000054315 RBP=ffff88806ce28140 RSP=ffff88806ce09ee0 R8 =0000000000000007 R9 =0000000000000000 R10=00000000000f100c R11=ffff88806ce09ff8 R12=0000000000054315 R13=0000000000000000 R14=0000000000000000 R15=ffff88806ce2b940 RIP=ffffffff81106295 RFL=00000013 [----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 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=00007f56eb248040 CR3=000000000d4aa000 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=5f32bdfba2e781a76b4547a9a2b7328b XMM02=000000000011b398eff9b2d0a8fce9cb XMM03=000000000011b4682c67c8bc2e329bc3 XMM04=fc0d33f257bdb7d600000000000ae988 XMM05=19e9129bd510f2350000000000132800 XMM06=c870f9c77d0a8b850000000000131668 XMM07=e042d86d42eb936e0000000000122c20 XMM08=66294e4cc822236e000000000011b468 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffed1002b69ef1 RBX=ffffed1002b69ef2 RCX=ffffffff845216ac RDX=ffffed1002b69ef2 RSI=0000000000000008 RDI=ffff888015b4f788 RBP=ffffed1002b69ef1 RSP=ffff888015b4f720 R8 =0000000000000001 R9 =ffffed1002b69ef1 R10=ffff888015b4f78f R11=00000000000b6a61 R12=fffffbfff0f6d440 R13=ffffffff87b6a200 R14=ffffffff85b76b00 R15=dffffc0000000000 RIP=ffffffff8180f189 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 00007f63a8452900 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=00007ffee8198000 CR3=0000000016aa0000 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