syzkaller login: [ 35.174940] BUG: Bad rss-counter state mm:00000000c0195a5c type:MM_FILEPAGES val:33 [ 35.176571] BUG: Bad rss-counter state mm:00000000c0195a5c type:MM_ANONPAGES val:22 [ 35.338663] ================================================================== [ 35.339540] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.340455] Read of size 8 at addr ffff88800de16a50 by task sshd/220 [ 35.341191] [ 35.341411] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.342607] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.343533] Call Trace: [ 35.343841] [ 35.344132] dump_stack_lvl+0x91/0xf0 [ 35.344600] print_report+0xcc/0x620 [ 35.345083] ? __virt_addr_valid+0x102/0x340 [ 35.345615] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.346216] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.346801] kasan_report+0xbe/0xf0 [ 35.347274] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.347865] vma_interval_tree_remove+0xc75/0xec0 [ 35.348461] vma_prepare+0xc54/0x11a0 [ 35.348952] __split_vma+0x5af/0x950 [ 35.349439] ? __pfx___split_vma+0x10/0x10 [ 35.349992] ? find_held_lock+0x2c/0x110 [ 35.350509] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.351093] ? lock_is_held_type+0x9f/0x120 [ 35.351626] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.352255] ? mtree_range_walk+0x632/0x900 [ 35.352798] ? mas_walk+0x5c7/0x7c0 [ 35.353284] do_vmi_munmap+0x1f1/0x2b0 [ 35.353828] mmap_region+0x1f9/0x2660 [ 35.354333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.354841] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.355562] ? __pfx_lock_acquire+0x10/0x10 [ 35.356130] ? __pfx_mmap_region+0x10/0x10 [ 35.356660] ? security_mmap_addr+0x7d/0xa0 [ 35.357207] ? get_unmapped_area+0x1f5/0x3f0 [ 35.357761] do_mmap+0x854/0xf00 [ 35.358218] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.358714] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.359278] ksys_mmap_pgoff+0x3af/0x500 [ 35.359759] do_syscall_64+0x3f/0x90 [ 35.360248] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.360871] RIP: 0033:0x7f8467231d82 [ 35.361309] 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 [ 35.363372] RSP: 002b:00007ffec7fcf198 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.364268] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8467231d82 [ 35.365085] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f846666b000 [ 35.365899] RBP: 00007f846666b000 R08: 0000000000000009 R09: 0000000000001000 [ 35.366701] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561d37eadec0 [ 35.367519] R13: 00007ffec7fcf1b0 R14: 00007ffec7fcf1e0 R15: 00007ffec7fcf540 [ 35.368356] [ 35.368639] [ 35.368865] Allocated by task 213: [ 35.369299] kasan_save_stack+0x22/0x50 [ 35.369821] kasan_set_track+0x25/0x30 [ 35.370321] __kasan_slab_alloc+0x59/0x70 [ 35.370845] kmem_cache_alloc+0x16b/0x370 [ 35.371374] vm_area_dup+0x20/0x160 [ 35.371820] __split_vma+0x170/0x950 [ 35.372311] split_vma+0xc6/0x110 [ 35.372757] mprotect_fixup+0x8d2/0xb30 [ 35.373273] do_mprotect_pkey+0x87e/0xd40 [ 35.373808] __x64_sys_mprotect+0x78/0xc0 [ 35.374341] do_syscall_64+0x3f/0x90 [ 35.374814] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.375463] [ 35.375681] Freed by task 213: [ 35.376104] kasan_save_stack+0x22/0x50 [ 35.376606] kasan_set_track+0x25/0x30 [ 35.377124] kasan_save_free_info+0x2b/0x50 [ 35.377672] __kasan_slab_free+0x10a/0x190 [ 35.378209] kmem_cache_free+0x10d/0x4d0 [ 35.378714] rcu_core+0x8c8/0x2860 [ 35.379180] __do_softirq+0x1b7/0x7d4 [ 35.379646] [ 35.379875] Last potentially related work creation: [ 35.380472] kasan_save_stack+0x22/0x50 [ 35.380992] __kasan_record_aux_stack+0x8e/0xa0 [ 35.381590] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.382242] remove_vma+0x139/0x170 [ 35.382698] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.383448] do_vmi_munmap+0x1f1/0x2b0 [ 35.383972] __vm_munmap+0x138/0x3a0 [ 35.384436] __x64_sys_munmap+0x59/0x80 [ 35.384951] do_syscall_64+0x3f/0x90 [ 35.385435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.386088] [ 35.386302] Second to last potentially related work creation: [ 35.386996] kasan_save_stack+0x22/0x50 [ 35.387492] __kasan_record_aux_stack+0x8e/0xa0 [ 35.388082] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.388717] remove_vma+0x139/0x170 [ 35.389192] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.389762] do_vmi_munmap+0x1f1/0x2b0 [ 35.390273] mmap_region+0x1f9/0x2660 [ 35.390751] do_mmap+0x854/0xf00 [ 35.391202] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.391690] ksys_mmap_pgoff+0x3af/0x500 [ 35.392215] do_syscall_64+0x3f/0x90 [ 35.392688] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.393344] [ 35.393583] The buggy address belongs to the object at ffff88800de169f8 [ 35.393583] which belongs to the cache vm_area_struct of size 168 [ 35.395081] The buggy address is located 88 bytes inside of [ 35.395081] freed 168-byte region [ffff88800de169f8, ffff88800de16aa0) [ 35.396505] [ 35.396720] The buggy address belongs to the physical page: [ 35.397408] page:000000009f169c98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xde16 [ 35.398516] memcg:ffff88800ea73c01 [ 35.398957] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.399591] page_type: 0xffffffff() [ 35.400073] raw: 0100000000000200 ffff88800879fc80 ffffea00003ada00 dead000000000006 [ 35.400998] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea73c01 [ 35.401946] page dumped because: kasan: bad access detected [ 35.402596] [ 35.402808] Memory state around the buggy address: [ 35.403401] ffff88800de16900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.404289] ffff88800de16980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 35.405166] >ffff88800de16a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.406056] ^ [ 35.406745] ffff88800de16a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 35.407592] ffff88800de16b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.408465] ================================================================== [ 35.409410] Disabling lock debugging due to kernel taint [ 37.161863] BUG: Bad rss-counter state mm:00000000ffedeb8e type:MM_FILEPAGES val:33 [ 37.162507] BUG: Bad rss-counter state mm:00000000ffedeb8e type:MM_ANONPAGES val:22 [ 37.690702] BUG: Bad rss-counter state mm:0000000018b5e401 type:MM_FILEPAGES val:33 [ 37.691912] BUG: Bad rss-counter state mm:0000000018b5e401 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21287' (ECDSA) to the list of known hosts. 2023/06/19 11:24:59 fuzzer started 2023/06/19 11:24:59 dialing manager at localhost:44161 2023/06/19 11:24:59 checking machine... 2023/06/19 11:24:59 checking revisions... [ 38.362968] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:24:59 testing simple program... [ 38.406106] cgroup: Unknown subsys name 'net' [ 38.488909] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:24:55 Registers: info registers vcpu 0 RAX=ffffed1003406f00 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888016c9b680 RSI=ffffffff814c84f5 RDI=ffffffff8560b640 RBP=1ffff11003406f00 RSP=ffff88801a0377f0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652a88 R15=0000000000000cc0 RIP=ffffffff812d8660 RFL=00000286 [--S--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 00007fb9dbf41900 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=00007fb9dc4f8618 CR3=0000000016d6a000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffffff85db8af4 RCX=ffffffff813782a7 RDX=0000000000000000 RSI=ffffffff860d1670 RDI=ffffffff85db8aec RBP=ffffffff85db8af4 RSP=ffff88806cf099e0 R8 =ffffffff860d1670 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000000fdc6 R12=ffffffff85db8af4 R13=ffffffff85db8aec R14=ffffffff85db8af0 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000256 [---ZAP-] 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=00007fb9dc4f90b0 CR3=00000000186a4000 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=2038353a34323a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038353a34323a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000