syzkaller login: [ 30.845032] BUG: Bad rss-counter state mm:0000000070fef747 type:MM_FILEPAGES val:33 [ 30.847174] BUG: Bad rss-counter state mm:0000000070fef747 type:MM_ANONPAGES val:22 [ 31.006813] ================================================================== [ 31.007978] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.009092] Read of size 8 at addr ffff888019c4d5c8 by task sshd/220 [ 31.009962] [ 31.010187] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.011054] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.012083] Call Trace: [ 31.012414] [ 31.012725] dump_stack_lvl+0x91/0xf0 [ 31.013221] print_report+0xcc/0x620 [ 31.013708] ? __virt_addr_valid+0x102/0x340 [ 31.014279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.014903] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.015533] kasan_report+0xbe/0xf0 [ 31.016070] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.016705] vma_interval_tree_remove+0xc75/0xec0 [ 31.017315] vma_prepare+0xc54/0x11a0 [ 31.017794] __split_vma+0x5af/0x950 [ 31.018271] ? __pfx___split_vma+0x10/0x10 [ 31.018806] ? find_held_lock+0x2c/0x110 [ 31.019332] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.019936] ? lock_is_held_type+0x9f/0x120 [ 31.020480] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.021138] ? mtree_range_walk+0x632/0x900 [ 31.021720] ? mas_walk+0x5c7/0x7c0 [ 31.022197] do_vmi_munmap+0x1f1/0x2b0 [ 31.022705] mmap_region+0x1f9/0x2660 [ 31.023191] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.023706] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.024418] ? __pfx_lock_acquire+0x10/0x10 [ 31.024986] ? __pfx_mmap_region+0x10/0x10 [ 31.025524] ? security_mmap_addr+0x7d/0xa0 [ 31.026099] ? get_unmapped_area+0x1f5/0x3f0 [ 31.026657] do_mmap+0x854/0xf00 [ 31.027102] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.027601] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.028174] ksys_mmap_pgoff+0x3af/0x500 [ 31.028705] do_syscall_64+0x3f/0x90 [ 31.029189] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.029874] RIP: 0033:0x7f5090031d82 [ 31.030337] 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 [ 31.032845] RSP: 002b:00007fffb3380068 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.033804] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5090031d82 [ 31.034687] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f508f46b000 [ 31.035541] RBP: 00007f508f46b000 R08: 0000000000000009 R09: 0000000000001000 [ 31.036428] R10: 0000000000000812 R11: 0000000000000206 R12: 000055caa1dd5ec0 [ 31.037307] R13: 00007fffb3380080 R14: 00007fffb33800b0 R15: 00007fffb3380410 [ 31.038209] [ 31.038506] [ 31.038752] Allocated by task 213: [ 31.039186] kasan_save_stack+0x22/0x50 [ 31.039708] kasan_set_track+0x25/0x30 [ 31.040204] __kasan_slab_alloc+0x59/0x70 [ 31.040793] kmem_cache_alloc+0x16b/0x370 [ 31.041318] vm_area_dup+0x20/0x160 [ 31.041776] __split_vma+0x170/0x950 [ 31.042246] split_vma+0xc6/0x110 [ 31.042694] mprotect_fixup+0x8d2/0xb30 [ 31.043195] do_mprotect_pkey+0x87e/0xd40 [ 31.043716] __x64_sys_mprotect+0x78/0xc0 [ 31.044241] do_syscall_64+0x3f/0x90 [ 31.044775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.045421] [ 31.045640] Freed by task 213: [ 31.046033] kasan_save_stack+0x22/0x50 [ 31.046539] kasan_set_track+0x25/0x30 [ 31.047036] kasan_save_free_info+0x2b/0x50 [ 31.047574] __kasan_slab_free+0x10a/0x190 [ 31.048112] kmem_cache_free+0x10d/0x4d0 [ 31.048684] rcu_core+0x8c8/0x2860 [ 31.049133] __do_softirq+0x1b7/0x7d4 [ 31.049617] [ 31.049833] Last potentially related work creation: [ 31.050421] kasan_save_stack+0x22/0x50 [ 31.050927] __kasan_record_aux_stack+0x8e/0xa0 [ 31.051500] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.052184] remove_vma+0x139/0x170 [ 31.052687] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.053214] do_vmi_munmap+0x1f1/0x2b0 [ 31.053677] __vm_munmap+0x138/0x3a0 [ 31.054116] __x64_sys_munmap+0x59/0x80 [ 31.054586] do_syscall_64+0x3f/0x90 [ 31.055045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.055648] [ 31.055853] Second to last potentially related work creation: [ 31.056509] kasan_save_stack+0x22/0x50 [ 31.057065] __kasan_record_aux_stack+0x8e/0xa0 [ 31.057615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.058231] remove_vma+0x139/0x170 [ 31.058659] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.059195] do_vmi_munmap+0x1f1/0x2b0 [ 31.059662] mmap_region+0x1f9/0x2660 [ 31.060110] do_mmap+0x854/0xf00 [ 31.060522] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.061039] ksys_mmap_pgoff+0x3af/0x500 [ 31.061542] do_syscall_64+0x3f/0x90 [ 31.062017] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.062659] [ 31.062871] The buggy address belongs to the object at ffff888019c4d570 [ 31.062871] which belongs to the cache vm_area_struct of size 168 [ 31.064357] The buggy address is located 88 bytes inside of [ 31.064357] freed 168-byte region [ffff888019c4d570, ffff888019c4d618) [ 31.065829] [ 31.066045] The buggy address belongs to the physical page: [ 31.066703] page:00000000a80a41c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19c4d [ 31.067770] memcg:ffff88801818b001 [ 31.068203] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.068917] page_type: 0xffffffff() [ 31.069369] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 31.070277] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801818b001 [ 31.071224] page dumped because: kasan: bad access detected [ 31.071886] [ 31.072109] Memory state around the buggy address: [ 31.072707] ffff888019c4d480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.073567] ffff888019c4d500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.074421] >ffff888019c4d580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.075296] ^ [ 31.075995] ffff888019c4d600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 31.076878] ffff888019c4d680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.077734] ================================================================== [ 31.078689] Disabling lock debugging due to kernel taint [ 32.932278] BUG: Bad rss-counter state mm:00000000c420f44c type:MM_FILEPAGES val:33 [ 32.933505] BUG: Bad rss-counter state mm:00000000c420f44c type:MM_ANONPAGES val:22 [ 33.497859] BUG: Bad rss-counter state mm:000000001cd49247 type:MM_FILEPAGES val:33 [ 33.499331] BUG: Bad rss-counter state mm:000000001cd49247 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13348' (ECDSA) to the list of known hosts. 2023/06/20 05:30:28 fuzzer started 2023/06/20 05:30:28 dialing manager at localhost:44161 2023/06/20 05:30:28 checking machine... 2023/06/20 05:30:28 checking revisions... [ 34.077698] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:30:28 testing simple program... [ 34.124852] cgroup: Unknown subsys name 'net' [ 34.187318] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:30:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fb686ced4a0 CR3=00000000183c6000 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=2038323a30333a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a30333a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf39500 RCX=ffffffff812e00e5 RDX=0000000000000001 RSI=0000000000000004 RDI=ffff88806cf09d18 RBP=1ffff1100d9e139f RSP=ffff88806cf09cf0 R8 =0000000000000001 R9 =ffffed100d9e13a3 R10=0000000000000003 R11=ffff88806cf09ff8 R12=ffff88806cf39508 R13=ffff88806cf39510 R14=0000000000000001 R15=ffff88801670b680 RIP=ffffffff812e00f6 RFL=00000046 [---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 00007f957e3fe900 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=00007fffbdb95000 CR3=000000000eb34000 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=0000006f730074696d7265705f6d6170 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000