syzkaller login: [ 34.707247] BUG: Bad rss-counter state mm:00000000c797aef4 type:MM_FILEPAGES val:33 [ 34.708273] BUG: Bad rss-counter state mm:00000000c797aef4 type:MM_ANONPAGES val:22 [ 34.868426] ================================================================== [ 34.869552] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.870726] Read of size 8 at addr ffff888019d415c8 by task sshd/219 [ 34.871820] [ 34.872041] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.872903] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.873880] Call Trace: [ 34.874202] [ 34.874488] dump_stack_lvl+0x91/0xf0 [ 34.874990] print_report+0xcc/0x620 [ 34.875484] ? __virt_addr_valid+0x102/0x340 [ 34.876051] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.876677] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.877310] kasan_report+0xbe/0xf0 [ 34.877800] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.878434] vma_interval_tree_remove+0xc75/0xec0 [ 34.879048] vma_prepare+0xc54/0x11a0 [ 34.879554] __split_vma+0x5af/0x950 [ 34.880030] ? __pfx___split_vma+0x10/0x10 [ 34.880559] ? find_held_lock+0x2c/0x110 [ 34.881096] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.881667] ? lock_is_held_type+0x9f/0x120 [ 34.882213] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.882824] ? mtree_range_walk+0x632/0x900 [ 34.883399] ? mas_walk+0x5c7/0x7c0 [ 34.883880] do_vmi_munmap+0x1f1/0x2b0 [ 34.884385] mmap_region+0x1f9/0x2660 [ 34.884874] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.885399] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.886134] ? __pfx_lock_acquire+0x10/0x10 [ 34.886676] ? __pfx_mmap_region+0x10/0x10 [ 34.887237] ? security_mmap_addr+0x7d/0xa0 [ 34.887778] ? get_unmapped_area+0x1f5/0x3f0 [ 34.888334] do_mmap+0x854/0xf00 [ 34.888786] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.889293] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.889862] ksys_mmap_pgoff+0x3af/0x500 [ 34.890375] do_syscall_64+0x3f/0x90 [ 34.890851] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.891517] RIP: 0033:0x7f5761e96d82 [ 34.891980] 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 [ 34.894134] RSP: 002b:00007fff616902c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.895048] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5761e96d82 [ 34.895906] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f57612d0000 [ 34.896782] RBP: 00007f57612d0000 R08: 0000000000000009 R09: 0000000000001000 [ 34.897655] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d01ce1dec0 [ 34.898518] R13: 00007fff616902e0 R14: 00007fff61690310 R15: 00007fff61690670 [ 34.899406] [ 34.899708] [ 34.899930] Allocated by task 212: [ 34.900369] kasan_save_stack+0x22/0x50 [ 34.900871] kasan_set_track+0x25/0x30 [ 34.901373] __kasan_slab_alloc+0x59/0x70 [ 34.901907] kmem_cache_alloc+0x16b/0x370 [ 34.902432] vm_area_dup+0x20/0x160 [ 34.902893] __split_vma+0x170/0x950 [ 34.903388] split_vma+0xc6/0x110 [ 34.903838] mprotect_fixup+0x8d2/0xb30 [ 34.904345] do_mprotect_pkey+0x87e/0xd40 [ 34.904876] __x64_sys_mprotect+0x78/0xc0 [ 34.905398] do_syscall_64+0x3f/0x90 [ 34.905881] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.906530] [ 34.906747] Freed by task 212: [ 34.907153] kasan_save_stack+0x22/0x50 [ 34.907658] kasan_set_track+0x25/0x30 [ 34.908158] kasan_save_free_info+0x2b/0x50 [ 34.908695] __kasan_slab_free+0x10a/0x190 [ 34.909235] kmem_cache_free+0x10d/0x4d0 [ 34.909754] rcu_core+0x8c8/0x2860 [ 34.910200] __do_softirq+0x1b7/0x7d4 [ 34.910686] [ 34.910902] Last potentially related work creation: [ 34.911499] kasan_save_stack+0x22/0x50 [ 34.912006] __kasan_record_aux_stack+0x8e/0xa0 [ 34.912633] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.913290] remove_vma+0x139/0x170 [ 34.913751] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.914323] do_vmi_munmap+0x1f1/0x2b0 [ 34.914816] __vm_munmap+0x138/0x3a0 [ 34.915313] __x64_sys_munmap+0x59/0x80 [ 34.915817] do_syscall_64+0x3f/0x90 [ 34.916291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.916934] [ 34.917150] The buggy address belongs to the object at ffff888019d41570 [ 34.917150] which belongs to the cache vm_area_struct of size 168 [ 34.918626] The buggy address is located 88 bytes inside of [ 34.918626] freed 168-byte region [ffff888019d41570, ffff888019d41618) [ 34.920076] [ 34.920292] The buggy address belongs to the physical page: [ 34.920948] page:00000000c3b23ccf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d41 [ 34.922060] memcg:ffff888015eb3301 [ 34.922493] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.923143] page_type: 0xffffffff() [ 34.923597] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.924534] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015eb3301 [ 34.925434] page dumped because: kasan: bad access detected [ 34.926101] [ 34.926317] Memory state around the buggy address: [ 34.926901] ffff888019d41480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.927773] ffff888019d41500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 34.928640] >ffff888019d41580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.929504] ^ [ 34.930180] ffff888019d41600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.931041] ffff888019d41680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.931914] ================================================================== [ 34.932852] Disabling lock debugging due to kernel taint [ 36.909088] BUG: Bad rss-counter state mm:00000000b8320c41 type:MM_FILEPAGES val:33 [ 36.910249] BUG: Bad rss-counter state mm:00000000b8320c41 type:MM_ANONPAGES val:22 [ 37.386342] BUG: Bad rss-counter state mm:00000000da75b9fc type:MM_FILEPAGES val:33 [ 37.387564] BUG: Bad rss-counter state mm:00000000da75b9fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47944' (ECDSA) to the list of known hosts. 2023/06/19 23:26:32 fuzzer started 2023/06/19 23:26:32 dialing manager at localhost:44161 2023/06/19 23:26:32 checking machine... 2023/06/19 23:26:32 checking revisions... [ 38.004393] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:26:32 testing simple program... [ 38.045671] cgroup: Unknown subsys name 'net' [ 38.087596] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:26:28 Registers: info registers vcpu 0 RAX=ffffffff86508d84 RBX=0000000000000001 RCX=ffffffff818470db RDX=0000000000008471 RSI=0000000000008470 RDI=ffffffff86508d84 RBP=ffff888017aaf5d0 RSP=ffff888017aaf508 R8 =0000000000000000 R9 =ffff888017aaf5b8 R10=0000000000038001 R11=0000000000021edf R12=ffff888017aaf5d8 R13=ffff888017aaf5c0 R14=ffff888017aaf5b9 R15=ffff888017aaf578 RIP=ffffffff811307e6 RFL=00000213 [----A-C] 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 00007fde99b54700 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=00007fb8252880b0 CR3=000000000e528000 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=2031333a36323a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031333a36323a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff864f59cc RBX=0000000000000002 RCX=ffffffff813782a7 RDX=0000000000003783 RSI=0000000000003782 RDI=ffffffff864f59cc RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000000 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000000fdc6 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff811307e6 RFL=00000217 [----APC] 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=00007f01723198c0 CR3=000000000d460000 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=cf302b1685b0d68cfa4910030c7bb2a6 XMM02=000000000011da50eff9b2d0a8fce9cb XMM03=000000000011db202c67c8bc2e329bc3 XMM04=49b19ae2e25b346100000000000ae988 XMM05=dfcdbad4f1609c3700000000001342c0 XMM06=d00d15eb48947dce0000000000133128 XMM07=e042d86d42eb936e0000000000124a48 XMM08=006c0a9c276a641d000000000011db20 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000