syzkaller login: [ 28.825454] BUG: Bad rss-counter state mm:00000000ac77cef1 type:MM_FILEPAGES val:33 [ 28.826586] BUG: Bad rss-counter state mm:00000000ac77cef1 type:MM_ANONPAGES val:22 [ 28.984740] ================================================================== [ 28.985646] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.986584] Read of size 8 at addr ffff888015e67880 by task sshd/220 [ 28.987353] [ 28.987571] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.988612] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.989574] Call Trace: [ 28.989892] [ 28.990203] dump_stack_lvl+0x91/0xf0 [ 28.990700] print_report+0xcc/0x620 [ 28.991187] ? __virt_addr_valid+0x102/0x340 [ 28.991743] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.992364] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.992987] kasan_report+0xbe/0xf0 [ 28.993472] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.994092] vma_interval_tree_remove+0xc75/0xec0 [ 28.994705] vma_prepare+0xc54/0x11a0 [ 28.995189] __split_vma+0x5af/0x950 [ 28.995658] ? __pfx___split_vma+0x10/0x10 [ 28.996187] ? find_held_lock+0x2c/0x110 [ 28.996713] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.997278] ? lock_is_held_type+0x9f/0x120 [ 28.997817] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.998421] ? mtree_range_walk+0x632/0x900 [ 28.998976] ? mas_walk+0x5c7/0x7c0 [ 28.999455] do_vmi_munmap+0x1f1/0x2b0 [ 28.999948] mmap_region+0x1f9/0x2660 [ 29.000449] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.000960] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.001672] ? __pfx_lock_acquire+0x10/0x10 [ 29.002208] ? __pfx_mmap_region+0x10/0x10 [ 29.002735] ? security_mmap_addr+0x7d/0xa0 [ 29.003263] ? get_unmapped_area+0x1f5/0x3f0 [ 29.003809] do_mmap+0x854/0xf00 [ 29.004253] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.004758] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.005319] ksys_mmap_pgoff+0x3af/0x500 [ 29.005822] do_syscall_64+0x3f/0x90 [ 29.006306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.006952] RIP: 0033:0x7fb03c793d82 [ 29.007417] 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 [ 29.009553] RSP: 002b:00007ffc896fee38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.010458] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb03c793d82 [ 29.011298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb03bbcd000 [ 29.012134] RBP: 00007fb03bbcd000 R08: 0000000000000009 R09: 0000000000001000 [ 29.013052] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561a930c0f70 [ 29.013899] R13: 00007ffc896fee50 R14: 00007ffc896fee80 R15: 00007ffc896ff1e0 [ 29.014751] [ 29.015046] [ 29.015262] Allocated by task 213: [ 29.015690] kasan_save_stack+0x22/0x50 [ 29.016193] kasan_set_track+0x25/0x30 [ 29.016708] __kasan_slab_alloc+0x59/0x70 [ 29.017232] kmem_cache_alloc+0x16b/0x370 [ 29.017746] vm_area_dup+0x20/0x160 [ 29.018199] __split_vma+0x170/0x950 [ 29.018663] split_vma+0xc6/0x110 [ 29.019098] mprotect_fixup+0x8d2/0xb30 [ 29.019603] do_mprotect_pkey+0x87e/0xd40 [ 29.020121] __x64_sys_mprotect+0x78/0xc0 [ 29.020651] do_syscall_64+0x3f/0x90 [ 29.021131] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.021773] [ 29.021989] Freed by task 213: [ 29.022381] kasan_save_stack+0x22/0x50 [ 29.022878] kasan_set_track+0x25/0x30 [ 29.023375] kasan_save_free_info+0x2b/0x50 [ 29.023898] __kasan_slab_free+0x10a/0x190 [ 29.024443] kmem_cache_free+0x10d/0x4d0 [ 29.024950] rcu_core+0x8c8/0x2860 [ 29.025387] __do_softirq+0x1b7/0x7d4 [ 29.025872] [ 29.026089] Last potentially related work creation: [ 29.026667] kasan_save_stack+0x22/0x50 [ 29.027174] __kasan_record_aux_stack+0x8e/0xa0 [ 29.027746] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.028395] remove_vma+0x139/0x170 [ 29.028843] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.029398] do_vmi_munmap+0x1f1/0x2b0 [ 29.029953] __vm_munmap+0x138/0x3a0 [ 29.030421] __x64_sys_munmap+0x59/0x80 [ 29.030915] do_syscall_64+0x3f/0x90 [ 29.031393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.032027] [ 29.032247] The buggy address belongs to the object at ffff888015e67828 [ 29.032247] which belongs to the cache vm_area_struct of size 168 [ 29.033724] The buggy address is located 88 bytes inside of [ 29.033724] freed 168-byte region [ffff888015e67828, ffff888015e678d0) [ 29.035106] [ 29.035325] The buggy address belongs to the physical page: [ 29.035979] page:00000000f9961cb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15e67 [ 29.037076] memcg:ffff888018e56801 [ 29.037509] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.038151] page_type: 0xffffffff() [ 29.038603] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.039524] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018e56801 [ 29.040440] page dumped because: kasan: bad access detected [ 29.041098] [ 29.041313] Memory state around the buggy address: [ 29.041895] ffff888015e67780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 29.042752] ffff888015e67800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 29.043598] >ffff888015e67880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 29.044453] ^ [ 29.044861] ffff888015e67900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.045710] ffff888015e67980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 29.046546] ================================================================== [ 29.047465] Disabling lock debugging due to kernel taint [ 30.978105] BUG: Bad rss-counter state mm:00000000d17bfe7d type:MM_FILEPAGES val:33 [ 30.979646] BUG: Bad rss-counter state mm:00000000d17bfe7d type:MM_ANONPAGES val:22 [ 31.449976] BUG: Bad rss-counter state mm:00000000d37586e5 type:MM_FILEPAGES val:33 [ 31.451560] BUG: Bad rss-counter state mm:00000000d37586e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11078' (ECDSA) to the list of known hosts. 2023/06/21 04:00:34 fuzzer started 2023/06/21 04:00:35 dialing manager at localhost:36067 2023/06/21 04:00:35 checking machine... 2023/06/21 04:00:35 checking revisions... [ 32.187393] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:00:35 testing simple program... [ 32.227171] cgroup: Unknown subsys name 'net' [ 32.290728] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:00:34 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f4789d44477 RCX=ffffffff813a0add RDX=ffff88800f938000 RSI=0000000000000000 RDI=0000000000000006 RBP=ffffffffffffffff RSP=ffff8880165378b0 R8 =0000000000000006 R9 =00007f4789d44477 R10=ffffffffffffffff R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f938000 R15=0000000000000cc0 RIP=ffffffff814c0860 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 00007f4789851900 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=0000563c02901318 CR3=000000000e9be000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 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=00007fff4f7f3728 CR3=0000000005482000 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=00007fdb2838b510000055ab96d08790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000