syzkaller login: [ 28.664975] BUG: Bad rss-counter state mm:000000008dd8dadd type:MM_FILEPAGES val:33 [ 28.665972] BUG: Bad rss-counter state mm:000000008dd8dadd type:MM_ANONPAGES val:22 [ 28.830959] ================================================================== [ 28.832029] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.833001] Read of size 8 at addr ffff8880191cb4e0 by task sshd/221 [ 28.833967] [ 28.834189] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.835079] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.836119] Call Trace: [ 28.836452] [ 28.836743] dump_stack_lvl+0x91/0xf0 [ 28.837246] print_report+0xcc/0x620 [ 28.837744] ? __virt_addr_valid+0x102/0x340 [ 28.838311] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.838950] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.839612] kasan_report+0xbe/0xf0 [ 28.840099] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.840745] vma_interval_tree_remove+0xc75/0xec0 [ 28.841364] vma_prepare+0xc54/0x11a0 [ 28.841861] __split_vma+0x5af/0x950 [ 28.842352] ? __pfx___split_vma+0x10/0x10 [ 28.842902] ? find_held_lock+0x2c/0x110 [ 28.843461] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.844039] ? lock_is_held_type+0x9f/0x120 [ 28.844592] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.845225] ? mtree_range_walk+0x632/0x900 [ 28.845800] ? mas_walk+0x5c7/0x7c0 [ 28.846292] do_vmi_munmap+0x1f1/0x2b0 [ 28.846833] mmap_region+0x1f9/0x2660 [ 28.847333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.847874] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.848606] ? __pfx_lock_acquire+0x10/0x10 [ 28.849161] ? __pfx_mmap_region+0x10/0x10 [ 28.849715] ? security_mmap_addr+0x7d/0xa0 [ 28.850270] ? get_unmapped_area+0x1f5/0x3f0 [ 28.850830] do_mmap+0x854/0xf00 [ 28.851287] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.851822] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.852404] ksys_mmap_pgoff+0x3af/0x500 [ 28.852934] do_syscall_64+0x3f/0x90 [ 28.853438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.854117] RIP: 0033:0x7fa4ec0a7d82 [ 28.854591] 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 [ 28.856849] RSP: 002b:00007ffecba78f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.857803] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa4ec0a7d82 [ 28.858694] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa4eb4e1000 [ 28.859586] RBP: 00007fa4eb4e1000 R08: 0000000000000009 R09: 0000000000001000 [ 28.860463] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560681182ec0 [ 28.861343] R13: 00007ffecba78f80 R14: 00007ffecba78fb0 R15: 00007ffecba79310 [ 28.862234] [ 28.862533] [ 28.862757] Allocated by task 214: [ 28.863202] kasan_save_stack+0x22/0x50 [ 28.863742] kasan_set_track+0x25/0x30 [ 28.864259] __kasan_slab_alloc+0x59/0x70 [ 28.864816] kmem_cache_alloc+0x16b/0x370 [ 28.865364] vm_area_dup+0x20/0x160 [ 28.865844] __split_vma+0x170/0x950 [ 28.866343] split_vma+0xc6/0x110 [ 28.866810] mprotect_fixup+0x8d2/0xb30 [ 28.867347] do_mprotect_pkey+0x87e/0xd40 [ 28.867916] __x64_sys_mprotect+0x78/0xc0 [ 28.868456] do_syscall_64+0x3f/0x90 [ 28.868958] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.869617] [ 28.869839] Freed by task 214: [ 28.870250] kasan_save_stack+0x22/0x50 [ 28.870771] kasan_set_track+0x25/0x30 [ 28.871284] kasan_save_free_info+0x2b/0x50 [ 28.871847] __kasan_slab_free+0x10a/0x190 [ 28.872400] kmem_cache_free+0x10d/0x4d0 [ 28.872927] rcu_core+0x8c8/0x2860 [ 28.873393] __do_softirq+0x1b7/0x7d4 [ 28.873893] [ 28.874114] Last potentially related work creation: [ 28.874721] kasan_save_stack+0x22/0x50 [ 28.875332] __kasan_record_aux_stack+0x8e/0xa0 [ 28.875961] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.876630] remove_vma+0x139/0x170 [ 28.877102] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.877677] do_vmi_munmap+0x1f1/0x2b0 [ 28.878185] __vm_munmap+0x138/0x3a0 [ 28.878678] __x64_sys_munmap+0x59/0x80 [ 28.879193] do_syscall_64+0x3f/0x90 [ 28.879704] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.880374] [ 28.880597] Second to last potentially related work creation: [ 28.881298] kasan_save_stack+0x22/0x50 [ 28.881822] __kasan_record_aux_stack+0x8e/0xa0 [ 28.882403] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.883069] remove_vma+0x139/0x170 [ 28.883543] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.884120] do_vmi_munmap+0x1f1/0x2b0 [ 28.884631] mmap_region+0x1f9/0x2660 [ 28.885131] do_mmap+0x854/0xf00 [ 28.885587] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.886113] ksys_mmap_pgoff+0x3af/0x500 [ 28.886655] do_syscall_64+0x3f/0x90 [ 28.887158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.887852] [ 28.888075] The buggy address belongs to the object at ffff8880191cb488 [ 28.888075] which belongs to the cache vm_area_struct of size 168 [ 28.889634] The buggy address is located 88 bytes inside of [ 28.889634] freed 168-byte region [ffff8880191cb488, ffff8880191cb530) [ 28.891151] [ 28.891390] The buggy address belongs to the physical page: [ 28.892098] page:00000000419903c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x191cb [ 28.893210] memcg:ffff88800dbe6801 [ 28.893635] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.894293] page_type: 0xffffffff() [ 28.894744] raw: 0100000000000200 ffff8880087a0c80 ffffea00006473c0 dead000000000004 [ 28.895695] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dbe6801 [ 28.896609] page dumped because: kasan: bad access detected [ 28.897278] [ 28.897494] Memory state around the buggy address: [ 28.898076] ffff8880191cb380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.898943] ffff8880191cb400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 28.899813] >ffff8880191cb480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.900681] ^ [ 28.901444] ffff8880191cb500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 28.902291] ffff8880191cb580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.903134] ================================================================== [ 28.904089] Disabling lock debugging due to kernel taint [ 31.532600] BUG: Bad rss-counter state mm:00000000798ad661 type:MM_FILEPAGES val:33 [ 31.533757] BUG: Bad rss-counter state mm:00000000798ad661 type:MM_ANONPAGES val:22 [ 31.972731] BUG: Bad rss-counter state mm:0000000098542928 type:MM_FILEPAGES val:33 [ 31.973726] BUG: Bad rss-counter state mm:0000000098542928 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2945' (ECDSA) to the list of known hosts. 2023/06/21 06:10:56 fuzzer started 2023/06/21 06:10:57 dialing manager at localhost:36067 2023/06/21 06:10:57 checking machine... 2023/06/21 06:10:57 checking revisions... [ 32.702523] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:10:57 testing simple program... [ 32.757975] cgroup: Unknown subsys name 'net' [ 32.800593] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:10:56 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888014327508 RSI=ffff888014327af0 RDI=ffff888014327510 RBP=ffff888014327e60 RSP=ffff888014327450 R8 =0000000000000001 R9 =ffff888014327500 R10=0000000000038001 R11=000000000009a9c3 R12=ffff888014327520 R13=ffff888014327508 R14=ffff888014327af0 R15=ffff8880143274c0 RIP=ffffffff81131c58 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 00007f7aa18d8900 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=000055dfd277e568 CR3=000000000cba4000 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=7a8712f217edc6ab0f448a107205bcc8 XMM02=000000000011c370eff9b2d0a8fce9cb XMM03=000000000011c4402c67c8bc2e329bc3 XMM04=bbc020309805d5d900000000000ae988 XMM05=36ee07bc3de462b00000000000135028 XMM06=c291bd5c70af25b900000000001340c8 XMM07=fb795ef6d65770560000000000123048 XMM08=2c67c8bc2e329bc3000000000011c3e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864bbb59 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=0000000000000000 RSI=1ffffffff0c9776b RDI=ffffffff86055348 RBP=ffff8880102afa00 RSP=ffff8880102af938 R8 =ffffffff864bbb4e R9 =ffff8880102af9e8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff8880102afa08 R13=ffff8880102af9f0 R14=ffff8880102af9e9 R15=ffff8880102af9a8 RIP=ffffffff81130a5b RFL=00000212 [----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 00007f9c72e49900 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=00007f9c733fe650 CR3=000000000b360000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000