syzkaller login: [ 33.024116] BUG: Bad rss-counter state mm:00000000144c0a14 type:MM_FILEPAGES val:33 [ 33.025190] BUG: Bad rss-counter state mm:00000000144c0a14 type:MM_ANONPAGES val:22 [ 33.133985] ================================================================== [ 33.134666] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.135323] Read of size 8 at addr ffff88800eb2b3f8 by task sshd/220 [ 33.135860] [ 33.136015] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.136623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.137302] Call Trace: [ 33.137530] [ 33.137812] dump_stack_lvl+0x91/0xf0 [ 33.138219] print_report+0xcc/0x620 [ 33.138574] ? __virt_addr_valid+0x102/0x340 [ 33.138968] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.139400] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.139835] kasan_report+0xbe/0xf0 [ 33.140170] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.140633] vma_interval_tree_remove+0xc75/0xec0 [ 33.141060] vma_prepare+0xc54/0x11a0 [ 33.141396] __split_vma+0x5af/0x950 [ 33.141638] ? __pfx___split_vma+0x10/0x10 [ 33.141907] ? find_held_lock+0x2c/0x110 [ 33.142175] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.142460] ? lock_is_held_type+0x9f/0x120 [ 33.142752] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.143059] ? mtree_range_walk+0x632/0x900 [ 33.143344] ? mas_walk+0x5c7/0x7c0 [ 33.143594] do_vmi_munmap+0x1f1/0x2b0 [ 33.143848] mmap_region+0x1f9/0x2660 [ 33.144094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.144357] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.144720] ? __pfx_lock_acquire+0x10/0x10 [ 33.144991] ? __pfx_mmap_region+0x10/0x10 [ 33.145262] ? security_mmap_addr+0x7d/0xa0 [ 33.145534] ? get_unmapped_area+0x1f5/0x3f0 [ 33.145813] do_mmap+0x854/0xf00 [ 33.146038] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.146288] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.146587] ksys_mmap_pgoff+0x3af/0x500 [ 33.146851] do_syscall_64+0x3f/0x90 [ 33.147096] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.147424] RIP: 0033:0x7f99df1d3d82 [ 33.147659] 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 [ 33.148728] RSP: 002b:00007ffe24213028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.149180] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99df1d3d82 [ 33.149609] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99de60d000 [ 33.150038] RBP: 00007f99de60d000 R08: 0000000000000009 R09: 0000000000001000 [ 33.150466] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cb3607bec0 [ 33.150915] R13: 00007ffe24213040 R14: 00007ffe24213070 R15: 00007ffe242133d0 [ 33.151350] [ 33.151501] [ 33.151611] Allocated by task 212: [ 33.151829] kasan_save_stack+0x22/0x50 [ 33.152086] kasan_set_track+0x25/0x30 [ 33.152338] __kasan_slab_alloc+0x59/0x70 [ 33.152607] kmem_cache_alloc+0x16b/0x370 [ 33.152871] vm_area_dup+0x20/0x160 [ 33.153105] __split_vma+0x170/0x950 [ 33.153344] split_vma+0xc6/0x110 [ 33.153569] mprotect_fixup+0x8d2/0xb30 [ 33.153826] do_mprotect_pkey+0x87e/0xd40 [ 33.154092] __x64_sys_mprotect+0x78/0xc0 [ 33.154356] do_syscall_64+0x3f/0x90 [ 33.154606] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.154933] [ 33.155046] Freed by task 209: [ 33.155247] kasan_save_stack+0x22/0x50 [ 33.155507] kasan_set_track+0x25/0x30 [ 33.155762] kasan_save_free_info+0x2b/0x50 [ 33.156031] __kasan_slab_free+0x10a/0x190 [ 33.156304] kmem_cache_free+0x10d/0x4d0 [ 33.156561] rcu_core+0x8c8/0x2860 [ 33.156791] __do_softirq+0x1b7/0x7d4 [ 33.157034] [ 33.157147] Last potentially related work creation: [ 33.157447] kasan_save_stack+0x22/0x50 [ 33.157706] __kasan_record_aux_stack+0x8e/0xa0 [ 33.157998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.158326] remove_vma+0x139/0x170 [ 33.158571] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.158856] do_vmi_munmap+0x1f1/0x2b0 [ 33.159105] __vm_munmap+0x138/0x3a0 [ 33.159345] __x64_sys_munmap+0x59/0x80 [ 33.159599] do_syscall_64+0x3f/0x90 [ 33.159847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.160179] [ 33.160293] The buggy address belongs to the object at ffff88800eb2b3a0 [ 33.160293] which belongs to the cache vm_area_struct of size 168 [ 33.161040] The buggy address is located 88 bytes inside of [ 33.161040] freed 168-byte region [ffff88800eb2b3a0, ffff88800eb2b448) [ 33.161752] [ 33.161863] The buggy address belongs to the physical page: [ 33.162197] page:00000000821c1f27 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeb2b [ 33.162751] memcg:ffff888016ac4601 [ 33.162968] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.163297] page_type: 0xffffffff() [ 33.163527] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.163993] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ac4601 [ 33.164453] page dumped because: kasan: bad access detected [ 33.164789] [ 33.164899] Memory state around the buggy address: [ 33.165198] ffff88800eb2b280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 33.165634] ffff88800eb2b300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 33.166071] >ffff88800eb2b380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 33.166502] ^ [ 33.166939] ffff88800eb2b400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 33.167367] ffff88800eb2b480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.167798] ================================================================== [ 33.168328] Disabling lock debugging due to kernel taint [ 35.817987] BUG: Bad rss-counter state mm:00000000297f73b9 type:MM_FILEPAGES val:33 [ 35.819515] BUG: Bad rss-counter state mm:00000000297f73b9 type:MM_ANONPAGES val:22 [ 36.270883] BUG: Bad rss-counter state mm:0000000042e0a4b7 type:MM_FILEPAGES val:33 [ 36.271950] BUG: Bad rss-counter state mm:0000000042e0a4b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51666' (ECDSA) to the list of known hosts. 2023/06/20 00:20:09 fuzzer started 2023/06/20 00:20:09 dialing manager at localhost:44161 2023/06/20 00:20:09 checking machine... 2023/06/20 00:20:09 checking revisions... [ 37.018885] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:20:09 testing simple program... [ 37.067143] cgroup: Unknown subsys name 'net' [ 37.107813] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:20:07 Registers: info registers vcpu 0 RAX=ffffffff810001ce RBX=0000000000000001 RCX=0000000000000001 RDX=ffffffff85407f01 RSI=ffffffff85407f50 RDI=ffffffff85407f50 RBP=ffff88806ce09aa8 RSP=ffff88806ce099d8 R8 =ffffffff864bd3ea R9 =ffff88806ce09a90 R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffffffff85407f58 R15=ffff88806ce09a50 RIP=ffffffff8112fbf3 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 0000000000000000 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=00007fadfc53c018 CR3=000000000c6de000 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=2039303a30323a3030203032206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a343233303620 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a30323a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c84fa RDI=ffff88800cad83f4 RBP=ffff88800cad8000 RSP=ffff88800fc7fa00 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=dffffc0000000000 RIP=ffffffff81374491 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 00007fa12d83f900 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=00007fa12ddf70b0 CR3=000000000c544000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=2f3a746f6f723a303a303a3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000