syzkaller login: [ 31.134133] BUG: Bad rss-counter state mm:00000000c17eda5b type:MM_FILEPAGES val:33 [ 31.135147] BUG: Bad rss-counter state mm:00000000c17eda5b type:MM_ANONPAGES val:22 [ 31.316801] ================================================================== [ 31.317923] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.319064] Read of size 8 at addr ffff88801930a3f8 by task sshd/221 [ 31.319924] [ 31.320164] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.321140] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.322228] Call Trace: [ 31.322579] [ 31.322898] dump_stack_lvl+0x91/0xf0 [ 31.323441] print_report+0xcc/0x620 [ 31.323975] ? __virt_addr_valid+0x102/0x340 [ 31.324593] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325985] kasan_report+0xbe/0xf0 [ 31.326546] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.327281] vma_interval_tree_remove+0xc75/0xec0 [ 31.327984] vma_prepare+0xc54/0x11a0 [ 31.328543] __split_vma+0x5af/0x950 [ 31.329109] ? __pfx___split_vma+0x10/0x10 [ 31.329720] ? find_held_lock+0x2c/0x110 [ 31.330316] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.330976] ? lock_is_held_type+0x9f/0x120 [ 31.331622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.332332] ? mtree_range_walk+0x632/0x900 [ 31.332967] ? mas_walk+0x5c7/0x7c0 [ 31.333526] do_vmi_munmap+0x1f1/0x2b0 [ 31.334097] mmap_region+0x1f9/0x2660 [ 31.334655] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.335243] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.336078] ? __pfx_lock_acquire+0x10/0x10 [ 31.336699] ? __pfx_mmap_region+0x10/0x10 [ 31.337312] ? security_mmap_addr+0x7d/0xa0 [ 31.337918] ? get_unmapped_area+0x1f5/0x3f0 [ 31.338557] do_mmap+0x854/0xf00 [ 31.339058] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.339632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.340279] ksys_mmap_pgoff+0x3af/0x500 [ 31.340870] do_syscall_64+0x3f/0x90 [ 31.341440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.342176] RIP: 0033:0x7fa44754dd82 [ 31.342699] 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 [ 31.345138] RSP: 002b:00007ffc526b8a68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.346168] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa44754dd82 [ 31.347134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa446987000 [ 31.348100] RBP: 00007fa446987000 R08: 0000000000000009 R09: 0000000000001000 [ 31.349098] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b439124ec0 [ 31.350063] R13: 00007ffc526b8a80 R14: 00007ffc526b8ab0 R15: 00007ffc526b8e10 [ 31.351050] [ 31.351380] [ 31.351630] Allocated by task 214: [ 31.352116] kasan_save_stack+0x22/0x50 [ 31.352683] kasan_set_track+0x25/0x30 [ 31.353243] __kasan_slab_alloc+0x59/0x70 [ 31.353828] kmem_cache_alloc+0x16b/0x370 [ 31.354402] vm_area_dup+0x20/0x160 [ 31.354908] __split_vma+0x170/0x950 [ 31.355440] split_vma+0xc6/0x110 [ 31.355922] mprotect_fixup+0x8d2/0xb30 [ 31.356488] do_mprotect_pkey+0x87e/0xd40 [ 31.357075] __x64_sys_mprotect+0x78/0xc0 [ 31.357654] do_syscall_64+0x3f/0x90 [ 31.358177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.358888] [ 31.359132] Freed by task 19: [ 31.359568] kasan_save_stack+0x22/0x50 [ 31.360119] kasan_set_track+0x25/0x30 [ 31.360663] kasan_save_free_info+0x2b/0x50 [ 31.361265] __kasan_slab_free+0x10a/0x190 [ 31.361858] kmem_cache_free+0x10d/0x4d0 [ 31.362419] rcu_core+0x8c8/0x2860 [ 31.362909] __do_softirq+0x1b7/0x7d4 [ 31.363436] [ 31.363677] Last potentially related work creation: [ 31.364322] kasan_save_stack+0x22/0x50 [ 31.364873] __kasan_record_aux_stack+0x8e/0xa0 [ 31.365510] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.366214] remove_vma+0x139/0x170 [ 31.366707] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.367315] do_vmi_munmap+0x1f1/0x2b0 [ 31.367844] __vm_munmap+0x138/0x3a0 [ 31.368356] __x64_sys_munmap+0x59/0x80 [ 31.368905] do_syscall_64+0x3f/0x90 [ 31.369435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.370140] [ 31.370375] The buggy address belongs to the object at ffff88801930a3a0 [ 31.370375] which belongs to the cache vm_area_struct of size 168 [ 31.371995] The buggy address is located 88 bytes inside of [ 31.371995] freed 168-byte region [ffff88801930a3a0, ffff88801930a448) [ 31.373560] [ 31.373796] The buggy address belongs to the physical page: [ 31.374529] page:0000000021facca2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1930a [ 31.375729] memcg:ffff88800d950301 [ 31.376196] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.376901] page_type: 0xffffffff() [ 31.377405] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.378401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d950301 [ 31.379397] page dumped because: kasan: bad access detected [ 31.380117] [ 31.380352] Memory state around the buggy address: [ 31.380995] ffff88801930a280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.381954] ffff88801930a300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.382891] >ffff88801930a380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.383838] ^ [ 31.384761] ffff88801930a400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.385700] ffff88801930a480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.386622] ================================================================== [ 31.387764] Disabling lock debugging due to kernel taint [ 33.822948] BUG: Bad rss-counter state mm:000000008bfd12c9 type:MM_FILEPAGES val:33 [ 33.824102] BUG: Bad rss-counter state mm:000000008bfd12c9 type:MM_ANONPAGES val:22 [ 34.345424] BUG: Bad rss-counter state mm:0000000019f4e6dd type:MM_FILEPAGES val:33 [ 34.347078] BUG: Bad rss-counter state mm:0000000019f4e6dd type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60411' (ECDSA) to the list of known hosts. 2023/06/21 09:33:59 fuzzer started 2023/06/21 09:33:59 dialing manager at localhost:36067 2023/06/21 09:34:00 checking machine... 2023/06/21 09:34:00 checking revisions... [ 35.048034] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:34:00 testing simple program... [ 35.092766] cgroup: Unknown subsys name 'net' [ 35.140899] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:33:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888018e7d080 RCX=0000000000000000 RDX=1ffff11002bd6905 RSI=ffffffff83c13dcf RDI=ffff888015eb4828 RBP=ffff888015eb4800 RSP=ffff88800fcf7d78 R8 =0000000000000001 R9 =ffffed10031cfa45 R10=ffff888018e7d22f R11=00000000000b6a61 R12=ffffffff84da44a0 R13=ffff888018e7d098 R14=0000000000000000 R15=ffff888018e7d140 RIP=ffffffff83c13de8 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 00007f75fa292900 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=00007ffc5aea0928 CR3=000000000c47c000 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=ffff88806cf2bd28 RBX=0000000000000000 RCX=0000000000000100 RDX=1ffff1100d9e5765 RSI=ffffffff813cb69a RDI=0000000000000004 RBP=ffff88806cf28140 RSP=ffff88806cf09f40 R8 =0000000000000004 R9 =000000000000f7fe R10=000000000000f7fe R11=ffff88806cf09ff8 R12=0000000000000046 R13=ffff88806cf2b98c R14=0000000000000000 R15=ffff88806cf2b940 RIP=ffffffff813c2859 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 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=00007f0486fe8ea0 CR3=000000000ddf2000 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=2039353a33333a3930203132206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a33333a3930203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000