syzkaller login: [ 60.403348] BUG: Bad rss-counter state mm:00000000bda1fd50 type:MM_FILEPAGES val:33 [ 60.404546] BUG: Bad rss-counter state mm:00000000bda1fd50 type:MM_ANONPAGES val:22 [ 60.442140] ================================================================== [ 60.443402] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 60.444694] Read of size 8 at addr ffff88800effe5c8 by task sshd/220 [ 60.445764] [ 60.446094] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 60.447133] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 60.448234] Call Trace: [ 60.448602] [ 60.448905] dump_stack_lvl+0x91/0xf0 [ 60.449505] print_report+0xcc/0x620 [ 60.450082] ? __virt_addr_valid+0x102/0x340 [ 60.450646] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.451389] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.452005] kasan_report+0xbe/0xf0 [ 60.452493] ? vma_interval_tree_remove+0xc75/0xec0 [ 60.453113] vma_interval_tree_remove+0xc75/0xec0 [ 60.453736] vma_prepare+0xc54/0x11a0 [ 60.454220] __split_vma+0x5af/0x950 [ 60.454688] ? __pfx___split_vma+0x10/0x10 [ 60.455216] ? find_held_lock+0x2c/0x110 [ 60.455739] do_vmi_align_munmap+0x2ba/0x11f0 [ 60.456308] ? lock_is_held_type+0x9f/0x120 [ 60.456848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 60.457490] ? mtree_range_walk+0x632/0x900 [ 60.458049] ? mas_walk+0x5c7/0x7c0 [ 60.458523] do_vmi_munmap+0x1f1/0x2b0 [ 60.459051] mmap_region+0x1f9/0x2660 [ 60.459547] ? vm_mmap_pgoff+0x15c/0x3a0 [ 60.460060] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 60.460778] ? __pfx_lock_acquire+0x10/0x10 [ 60.461313] ? __pfx_mmap_region+0x10/0x10 [ 60.461852] ? security_mmap_addr+0x7d/0xa0 [ 60.462383] ? get_unmapped_area+0x1f5/0x3f0 [ 60.462937] do_mmap+0x854/0xf00 [ 60.463375] vm_mmap_pgoff+0x1a6/0x3a0 [ 60.463875] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 60.464438] ksys_mmap_pgoff+0x3af/0x500 [ 60.464943] do_syscall_64+0x3f/0x90 [ 60.465452] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.466114] RIP: 0033:0x7f5406c58d82 [ 60.466567] 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 [ 60.468704] RSP: 002b:00007ffdaaf25f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 60.469626] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5406c58d82 [ 60.470468] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f5406092000 [ 60.471312] RBP: 00007f5406092000 R08: 0000000000000009 R09: 0000000000001000 [ 60.472165] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f8cb98ec0 [ 60.473014] R13: 00007ffdaaf25f80 R14: 00007ffdaaf25fb0 R15: 00007ffdaaf26310 [ 60.473877] [ 60.474170] [ 60.474387] Allocated by task 213: [ 60.474814] kasan_save_stack+0x22/0x50 [ 60.475316] kasan_set_track+0x25/0x30 [ 60.475808] __kasan_slab_alloc+0x59/0x70 [ 60.476335] kmem_cache_alloc+0x16b/0x370 [ 60.476852] vm_area_dup+0x20/0x160 [ 60.477305] __split_vma+0x170/0x950 [ 60.477787] split_vma+0xc6/0x110 [ 60.478226] mprotect_fixup+0x8d2/0xb30 [ 60.478732] do_mprotect_pkey+0x87e/0xd40 [ 60.479255] __x64_sys_mprotect+0x78/0xc0 [ 60.479772] do_syscall_64+0x3f/0x90 [ 60.480247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.480888] [ 60.481103] Freed by task 213: [ 60.481504] kasan_save_stack+0x22/0x50 [ 60.482010] kasan_set_track+0x25/0x30 [ 60.482500] kasan_save_free_info+0x2b/0x50 [ 60.483035] __kasan_slab_free+0x10a/0x190 [ 60.483570] kmem_cache_free+0x10d/0x4d0 [ 60.484082] rcu_core+0x8c8/0x2860 [ 60.484531] __do_softirq+0x1b7/0x7d4 [ 60.485012] [ 60.485227] Last potentially related work creation: [ 60.485820] kasan_save_stack+0x22/0x50 [ 60.486323] __kasan_record_aux_stack+0x8e/0xa0 [ 60.486960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 60.487605] remove_vma+0x139/0x170 [ 60.488053] do_vmi_align_munmap+0xd4a/0x11f0 [ 60.488607] do_vmi_munmap+0x1f1/0x2b0 [ 60.489092] __vm_munmap+0x138/0x3a0 [ 60.489573] __x64_sys_munmap+0x59/0x80 [ 60.490071] do_syscall_64+0x3f/0x90 [ 60.490545] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 60.491186] [ 60.491403] The buggy address belongs to the object at ffff88800effe570 [ 60.491403] which belongs to the cache vm_area_struct of size 168 [ 60.492867] The buggy address is located 88 bytes inside of [ 60.492867] freed 168-byte region [ffff88800effe570, ffff88800effe618) [ 60.494278] [ 60.494509] The buggy address belongs to the physical page: [ 60.495190] page:00000000b385a582 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeffe [ 60.496272] memcg:ffff88800ddf2501 [ 60.496699] flags: 0x100000000000200(slab|node=0|zone=1) [ 60.497342] page_type: 0xffffffff() [ 60.497810] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 60.498727] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ddf2501 [ 60.499631] page dumped because: kasan: bad access detected [ 60.500291] [ 60.500509] Memory state around the buggy address: [ 60.501086] ffff88800effe480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 60.501947] ffff88800effe500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 60.502795] >ffff88800effe580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.503651] ^ [ 60.504319] ffff88800effe600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 60.505217] ffff88800effe680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 60.506164] ================================================================== [ 60.507081] Disabling lock debugging due to kernel taint [ 62.584040] BUG: Bad rss-counter state mm:0000000050f3176c type:MM_FILEPAGES val:33 [ 62.585264] BUG: Bad rss-counter state mm:0000000050f3176c type:MM_ANONPAGES val:22 [ 63.051038] BUG: Bad rss-counter state mm:00000000dd12f5eb type:MM_FILEPAGES val:33 [ 63.051934] BUG: Bad rss-counter state mm:00000000dd12f5eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56383' (ECDSA) to the list of known hosts. 2023/06/20 12:45:28 fuzzer started 2023/06/20 12:45:28 dialing manager at localhost:36067 2023/06/20 12:45:28 checking machine... 2023/06/20 12:45:28 checking revisions... [ 63.771692] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:45:28 testing simple program... [ 63.817527] cgroup: Unknown subsys name 'net' [ 63.867837] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:45:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=00005615fc5b6fe0 CR3=0000000005482000 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=00007f4131fce5100000556162e4e790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000010 RBX=ffff888019045500 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff848a4e00 RDI=0000000000000452 RBP=ffffffff848a4e00 RSP=ffff8880167a7858 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000001 R12=0000000000000452 R13=00000000000000e4 R14=00000000000000f4 R15=0000000000000452 RIP=ffffffff814c0476 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 00007fa8820e8900 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=00007ffd982a3000 CR3=000000000e60e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000