syzkaller login: [ 42.866846] BUG: Bad rss-counter state mm:0000000005c3da00 type:MM_FILEPAGES val:33 [ 42.868941] BUG: Bad rss-counter state mm:0000000005c3da00 type:MM_ANONPAGES val:22 [ 43.005420] ================================================================== [ 43.006573] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.007896] Read of size 8 at addr ffff88801816ed08 by task sshd/219 [ 43.008532] [ 43.008703] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.009405] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.010194] Call Trace: [ 43.010453] [ 43.010678] dump_stack_lvl+0x91/0xf0 [ 43.011086] print_report+0xcc/0x620 [ 43.011465] ? __virt_addr_valid+0x102/0x340 [ 43.011909] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.012398] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.012894] kasan_report+0xbe/0xf0 [ 43.013289] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.013787] vma_interval_tree_remove+0xc75/0xec0 [ 43.014271] vma_prepare+0xc54/0x11a0 [ 43.014656] __split_vma+0x5af/0x950 [ 43.015052] ? __pfx___split_vma+0x10/0x10 [ 43.015478] ? find_held_lock+0x2c/0x110 [ 43.015900] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.016368] ? lock_is_held_type+0x9f/0x120 [ 43.016806] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.017295] ? mtree_range_walk+0x632/0x900 [ 43.017742] ? mas_walk+0x5c7/0x7c0 [ 43.018133] do_vmi_munmap+0x1f1/0x2b0 [ 43.018539] mmap_region+0x1f9/0x2660 [ 43.018942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.019358] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.019940] ? __pfx_lock_acquire+0x10/0x10 [ 43.020368] ? __pfx_mmap_region+0x10/0x10 [ 43.020798] ? security_mmap_addr+0x7d/0xa0 [ 43.021226] ? get_unmapped_area+0x1f5/0x3f0 [ 43.021677] do_mmap+0x854/0xf00 [ 43.022035] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.022441] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.022909] ksys_mmap_pgoff+0x3af/0x500 [ 43.023329] do_syscall_64+0x3f/0x90 [ 43.023722] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.024252] RIP: 0033:0x7f5590210d82 [ 43.024623] 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 [ 43.026331] RSP: 002b:00007ffdcabee158 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.027092] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5590210d82 [ 43.027782] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f558f64a000 [ 43.028469] RBP: 00007f558f64a000 R08: 0000000000000009 R09: 0000000000001000 [ 43.029155] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f2e0e3ec0 [ 43.029836] R13: 00007ffdcabee170 R14: 00007ffdcabee1a0 R15: 00007ffdcabee500 [ 43.030527] [ 43.030770] [ 43.030952] Allocated by task 212: [ 43.031303] kasan_save_stack+0x22/0x50 [ 43.031712] kasan_set_track+0x25/0x30 [ 43.032105] __kasan_slab_alloc+0x59/0x70 [ 43.032514] kmem_cache_alloc+0x16b/0x370 [ 43.032930] vm_area_dup+0x20/0x160 [ 43.033310] __split_vma+0x170/0x950 [ 43.033696] split_vma+0xc6/0x110 [ 43.034057] mprotect_fixup+0x8d2/0xb30 [ 43.034449] do_mprotect_pkey+0x87e/0xd40 [ 43.034885] __x64_sys_mprotect+0x78/0xc0 [ 43.035311] do_syscall_64+0x3f/0x90 [ 43.035699] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.036219] [ 43.036386] Freed by task 212: [ 43.036707] kasan_save_stack+0x22/0x50 [ 43.037113] kasan_set_track+0x25/0x30 [ 43.037501] kasan_save_free_info+0x2b/0x50 [ 43.037915] __kasan_slab_free+0x10a/0x190 [ 43.038328] kmem_cache_free+0x10d/0x4d0 [ 43.038742] rcu_core+0x8c8/0x2860 [ 43.039114] __do_softirq+0x1b7/0x7d4 [ 43.039495] [ 43.039677] Last potentially related work creation: [ 43.040159] kasan_save_stack+0x22/0x50 [ 43.040563] __kasan_record_aux_stack+0x8e/0xa0 [ 43.041020] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.041538] remove_vma+0x139/0x170 [ 43.041905] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.042351] do_vmi_munmap+0x1f1/0x2b0 [ 43.042750] __vm_munmap+0x138/0x3a0 [ 43.043138] __x64_sys_munmap+0x59/0x80 [ 43.043538] do_syscall_64+0x3f/0x90 [ 43.043936] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.044463] [ 43.044637] The buggy address belongs to the object at ffff88801816ecb0 [ 43.044637] which belongs to the cache vm_area_struct of size 168 [ 43.045809] The buggy address is located 88 bytes inside of [ 43.045809] freed 168-byte region [ffff88801816ecb0, ffff88801816ed58) [ 43.046969] [ 43.047145] The buggy address belongs to the physical page: [ 43.047684] page:00000000c1c0f17d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1816e [ 43.048574] memcg:ffff88800e25d901 [ 43.048916] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.049430] page_type: 0xffffffff() [ 43.049797] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.050537] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e25d901 [ 43.051280] page dumped because: kasan: bad access detected [ 43.051824] [ 43.051997] Memory state around the buggy address: [ 43.052460] ffff88801816ec00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 43.053149] ffff88801816ec80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 43.053837] >ffff88801816ed00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 43.054543] ^ [ 43.054901] ffff88801816ed80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 43.055595] ffff88801816ee00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 43.056277] ================================================================== [ 43.057060] Disabling lock debugging due to kernel taint [ 44.958988] BUG: Bad rss-counter state mm:00000000d68ebf01 type:MM_FILEPAGES val:33 [ 44.960075] BUG: Bad rss-counter state mm:00000000d68ebf01 type:MM_ANONPAGES val:22 [ 45.508742] BUG: Bad rss-counter state mm:000000008c3a7358 type:MM_FILEPAGES val:33 [ 45.510328] BUG: Bad rss-counter state mm:000000008c3a7358 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32496' (ECDSA) to the list of known hosts. 2023/06/20 00:25:38 fuzzer started 2023/06/20 00:25:38 dialing manager at localhost:44161 2023/06/20 00:25:38 checking machine... 2023/06/20 00:25:38 checking revisions... [ 46.280615] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:25:38 testing simple program... [ 46.333052] cgroup: Unknown subsys name 'net' [ 46.391476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:25:26 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000000 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff888008d7fc90 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000128 R12=0000000000000287 R13=ffff88801a1aa508 R14=ffffffff8186b9c5 R15=ffff8880068b8f00 RIP=ffffffff8135b8e0 RFL=00000047 [---Z-PC] 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=00007f25473a2eb0 CR3=000000000d52e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c345de844e99fe7a00000000000ae988 XMM05=5e0cf45bf2456b2600000000001345c8 XMM06=806171799158d96700000000001333b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806c400000 RBX=00000000871601c0 RCX=ffff88806c700e00 RDX=0000000000000009 RSI=0000000000000003 RDI=00000000f308b2c9 RBP=ffff88800f777150 RSP=ffff88806cf09b38 R8 =0000000075bff9e5 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=0000000000000001 R13=0000000000000000 R14=ffff88806cf09ba0 R15=0000000000000009 RIP=ffffffff82270f13 RFL=00000206 [-----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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f11316e1900 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=00007f1131e533ec CR3=000000000d8c8000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000