syzkaller login: [ 37.147870] BUG: Bad rss-counter state mm:000000004320dec0 type:MM_FILEPAGES val:33 [ 37.149063] BUG: Bad rss-counter state mm:000000004320dec0 type:MM_ANONPAGES val:22 [ 37.257732] ================================================================== [ 37.258577] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.259449] Read of size 8 at addr ffff8880159f1968 by task sshd/220 [ 37.260167] [ 37.260373] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.261218] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.262045] Call Trace: [ 37.262271] [ 37.262475] dump_stack_lvl+0x91/0xf0 [ 37.262835] print_report+0xcc/0x620 [ 37.263177] ? __virt_addr_valid+0x102/0x340 [ 37.263566] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.264005] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.264443] kasan_report+0xbe/0xf0 [ 37.264779] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.265218] vma_interval_tree_remove+0xc75/0xec0 [ 37.265654] vma_prepare+0xc54/0x11a0 [ 37.265993] __split_vma+0x5af/0x950 [ 37.266333] ? __pfx___split_vma+0x10/0x10 [ 37.266705] ? find_held_lock+0x2c/0x110 [ 37.267074] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.267467] ? lock_is_held_type+0x9f/0x120 [ 37.267852] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.268286] ? mtree_range_walk+0x632/0x900 [ 37.268677] ? mas_walk+0x5c7/0x7c0 [ 37.269008] do_vmi_munmap+0x1f1/0x2b0 [ 37.269354] mmap_region+0x1f9/0x2660 [ 37.269708] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.270073] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.270581] ? __pfx_lock_acquire+0x10/0x10 [ 37.270958] ? __pfx_mmap_region+0x10/0x10 [ 37.271336] ? security_mmap_addr+0x7d/0xa0 [ 37.271716] ? get_unmapped_area+0x1f5/0x3f0 [ 37.272107] do_mmap+0x854/0xf00 [ 37.272417] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.272767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.273158] ksys_mmap_pgoff+0x3af/0x500 [ 37.273530] do_syscall_64+0x3f/0x90 [ 37.273863] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.274327] RIP: 0033:0x7f18ce0e7d82 [ 37.274646] 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 [ 37.276148] RSP: 002b:00007ffc16411be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.276788] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f18ce0e7d82 [ 37.277384] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18cd521000 [ 37.278011] RBP: 00007f18cd521000 R08: 0000000000000009 R09: 0000000000001000 [ 37.278602] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561bb8f0ec0 [ 37.279207] R13: 00007ffc16411c00 R14: 00007ffc16411c30 R15: 00007ffc16411f90 [ 37.279814] [ 37.280020] [ 37.280174] Allocated by task 213: [ 37.280474] kasan_save_stack+0x22/0x50 [ 37.280830] kasan_set_track+0x25/0x30 [ 37.281179] __kasan_slab_alloc+0x59/0x70 [ 37.281563] kmem_cache_alloc+0x16b/0x370 [ 37.281926] vm_area_dup+0x20/0x160 [ 37.282243] __split_vma+0x170/0x950 [ 37.282565] split_vma+0xc6/0x110 [ 37.282873] mprotect_fixup+0x8d2/0xb30 [ 37.283227] do_mprotect_pkey+0x87e/0xd40 [ 37.283591] __x64_sys_mprotect+0x78/0xc0 [ 37.283956] do_syscall_64+0x3f/0x90 [ 37.284287] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.284739] [ 37.284890] Freed by task 213: [ 37.285165] kasan_save_stack+0x22/0x50 [ 37.285537] kasan_set_track+0x25/0x30 [ 37.285885] kasan_save_free_info+0x2b/0x50 [ 37.286261] __kasan_slab_free+0x10a/0x190 [ 37.286638] kmem_cache_free+0x10d/0x4d0 [ 37.286996] rcu_core+0x8c8/0x2860 [ 37.287310] __do_softirq+0x1b7/0x7d4 [ 37.287644] [ 37.287795] Last potentially related work creation: [ 37.288207] kasan_save_stack+0x22/0x50 [ 37.288559] __kasan_record_aux_stack+0x8e/0xa0 [ 37.288967] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.289435] remove_vma+0x139/0x170 [ 37.289757] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.290151] do_vmi_munmap+0x1f1/0x2b0 [ 37.290493] __vm_munmap+0x138/0x3a0 [ 37.290816] __x64_sys_munmap+0x59/0x80 [ 37.291162] do_syscall_64+0x3f/0x90 [ 37.291493] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.291944] [ 37.292092] The buggy address belongs to the object at ffff8880159f1910 [ 37.292092] which belongs to the cache vm_area_struct of size 168 [ 37.293130] The buggy address is located 88 bytes inside of [ 37.293130] freed 168-byte region [ffff8880159f1910, ffff8880159f19b8) [ 37.294138] [ 37.294287] The buggy address belongs to the physical page: [ 37.294751] page:000000003c60132e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159f1 [ 37.295515] memcg:ffff88800988ef01 [ 37.295817] flags: 0x100000000000200(slab|node=0|zone=1) [ 37.296272] page_type: 0xffffffff() [ 37.296585] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 37.297240] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800988ef01 [ 37.297888] page dumped because: kasan: bad access detected [ 37.298353] [ 37.298503] Memory state around the buggy address: [ 37.298907] ffff8880159f1800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 37.299511] ffff8880159f1880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 37.300120] >ffff8880159f1900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.300716] ^ [ 37.301270] ffff8880159f1980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 37.301903] ffff8880159f1a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.302499] ================================================================== [ 37.303167] Disabling lock debugging due to kernel taint [ 39.248361] BUG: Bad rss-counter state mm:00000000969259fe type:MM_FILEPAGES val:33 [ 39.249870] BUG: Bad rss-counter state mm:00000000969259fe type:MM_ANONPAGES val:22 [ 39.698152] BUG: Bad rss-counter state mm:000000004adc6667 type:MM_FILEPAGES val:33 [ 39.699292] BUG: Bad rss-counter state mm:000000004adc6667 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28147' (ECDSA) to the list of known hosts. 2023/06/19 23:30:46 fuzzer started 2023/06/19 23:30:47 dialing manager at localhost:44161 2023/06/19 23:30:47 checking machine... 2023/06/19 23:30:47 checking revisions... [ 40.422741] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:30:47 testing simple program... [ 40.480396] cgroup: Unknown subsys name 'net' [ 40.534633] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:30:39 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=ffff8880141e7a88 RSI=ffff8880141e7a50 RDI=ffff8880141e7658 RBP=ffff8880141e0000 RSP=ffff8880141e7618 R8 =0000000000000001 R9 =ffff8880141e7688 R10=0000000000038001 R11=0000000000021edf R12=ffff8880141e76a8 R13=ffff8880141e7690 R14=ffff8880141e7a50 R15=ffff8880141e7648 RIP=ffffffff81130930 RFL=00000292 [--S-A--] 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 00007f3251d36900 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=00007f32522eb650 CR3=0000000015828000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=ffff88800c20fe80 RBX=ffff8880193facb8 RCX=ffffffff81acd587 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800c20fe80 RBP=ffff88800c20fe80 RSP=ffff88801976f850 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000001 R13=0000000000000000 R14=ffff8880192c02b0 R15=ffff88801976f9d8 RIP=ffffffff8180eeb2 RFL=00000202 [-------] 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 00007f42b7fff700 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=00007fe79a96c798 CR3=00000000196cc000 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=2036343a30333a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a30333a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000