syzkaller login: [ 38.620563] BUG: Bad rss-counter state mm:00000000188bbff0 type:MM_FILEPAGES val:33 [ 38.621589] BUG: Bad rss-counter state mm:00000000188bbff0 type:MM_ANONPAGES val:22 [ 38.783592] ================================================================== [ 38.784492] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.785438] Read of size 8 at addr ffff888018d32a50 by task sshd/220 [ 38.786279] [ 38.786572] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.787448] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.788436] Call Trace: [ 38.788774] [ 38.789062] dump_stack_lvl+0x91/0xf0 [ 38.789568] print_report+0xcc/0x620 [ 38.790067] ? __virt_addr_valid+0x102/0x340 [ 38.790655] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.791291] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.791921] kasan_report+0xbe/0xf0 [ 38.792394] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.793015] vma_interval_tree_remove+0xc75/0xec0 [ 38.793624] vma_prepare+0xc54/0x11a0 [ 38.794096] __split_vma+0x5af/0x950 [ 38.794574] ? __pfx___split_vma+0x10/0x10 [ 38.795102] ? find_held_lock+0x2c/0x110 [ 38.795618] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.796184] ? lock_is_held_type+0x9f/0x120 [ 38.796720] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.797321] ? mtree_range_walk+0x632/0x900 [ 38.797869] ? mas_walk+0x5c7/0x7c0 [ 38.798343] do_vmi_munmap+0x1f1/0x2b0 [ 38.798844] mmap_region+0x1f9/0x2660 [ 38.799333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.799845] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.800555] ? __pfx_lock_acquire+0x10/0x10 [ 38.801085] ? __pfx_mmap_region+0x10/0x10 [ 38.801608] ? security_mmap_addr+0x7d/0xa0 [ 38.802135] ? get_unmapped_area+0x1f5/0x3f0 [ 38.802722] do_mmap+0x854/0xf00 [ 38.803164] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.803662] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.804229] ksys_mmap_pgoff+0x3af/0x500 [ 38.804730] do_syscall_64+0x3f/0x90 [ 38.805210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.805856] RIP: 0033:0x7f6a05af8d82 [ 38.806314] 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 [ 38.808452] RSP: 002b:00007ffd6c980898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.809357] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6a05af8d82 [ 38.810220] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6a04f32000 [ 38.811109] RBP: 00007f6a04f32000 R08: 0000000000000009 R09: 0000000000001000 [ 38.811993] R10: 0000000000000812 R11: 0000000000000206 R12: 000055867db66d90 [ 38.812845] R13: 00007ffd6c9808b0 R14: 00007ffd6c9808e0 R15: 00007ffd6c980c40 [ 38.813692] [ 38.813984] [ 38.814197] Allocated by task 213: [ 38.814631] kasan_save_stack+0x22/0x50 [ 38.815131] kasan_set_track+0x25/0x30 [ 38.815623] __kasan_slab_alloc+0x59/0x70 [ 38.816152] kmem_cache_alloc+0x16b/0x370 [ 38.816670] vm_area_dup+0x20/0x160 [ 38.817129] __split_vma+0x170/0x950 [ 38.817592] split_vma+0xc6/0x110 [ 38.818038] mprotect_fixup+0x8d2/0xb30 [ 38.818558] do_mprotect_pkey+0x87e/0xd40 [ 38.819084] __x64_sys_mprotect+0x78/0xc0 [ 38.819601] do_syscall_64+0x3f/0x90 [ 38.820078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.820717] [ 38.820931] Freed by task 213: [ 38.821323] kasan_save_stack+0x22/0x50 [ 38.821821] kasan_set_track+0x25/0x30 [ 38.822314] kasan_save_free_info+0x2b/0x50 [ 38.822887] __kasan_slab_free+0x10a/0x190 [ 38.823414] kmem_cache_free+0x10d/0x4d0 [ 38.823915] rcu_core+0x8c8/0x2860 [ 38.824362] __do_softirq+0x1b7/0x7d4 [ 38.824833] [ 38.825047] Last potentially related work creation: [ 38.825628] kasan_save_stack+0x22/0x50 [ 38.826131] __kasan_record_aux_stack+0x8e/0xa0 [ 38.826715] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.827437] remove_vma+0x139/0x170 [ 38.827886] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.828439] do_vmi_munmap+0x1f1/0x2b0 [ 38.828924] __vm_munmap+0x138/0x3a0 [ 38.829391] __x64_sys_munmap+0x59/0x80 [ 38.829887] do_syscall_64+0x3f/0x90 [ 38.830368] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.831014] [ 38.831227] Second to last potentially related work creation: [ 38.831908] kasan_save_stack+0x22/0x50 [ 38.832406] __kasan_record_aux_stack+0x8e/0xa0 [ 38.832973] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.833614] remove_vma+0x139/0x170 [ 38.834061] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.834632] do_vmi_munmap+0x1f1/0x2b0 [ 38.835113] mmap_region+0x1f9/0x2660 [ 38.835583] do_mmap+0x854/0xf00 [ 38.836013] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.836506] ksys_mmap_pgoff+0x3af/0x500 [ 38.837011] do_syscall_64+0x3f/0x90 [ 38.837481] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.838124] [ 38.838337] The buggy address belongs to the object at ffff888018d329f8 [ 38.838337] which belongs to the cache vm_area_struct of size 168 [ 38.839810] The buggy address is located 88 bytes inside of [ 38.839810] freed 168-byte region [ffff888018d329f8, ffff888018d32aa0) [ 38.841210] [ 38.841424] The buggy address belongs to the physical page: [ 38.842095] page:000000009aaeb108 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18d32 [ 38.843201] memcg:ffff88800c538101 [ 38.843629] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.844276] page_type: 0xffffffff() [ 38.844731] raw: 0100000000000200 ffff8880087a0c80 ffffea00005be380 dead000000000008 [ 38.845655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c538101 [ 38.846572] page dumped because: kasan: bad access detected [ 38.847234] [ 38.847450] Memory state around the buggy address: [ 38.848042] ffff888018d32900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.848915] ffff888018d32980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 38.849791] >ffff888018d32a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.850677] ^ [ 38.851399] ffff888018d32a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 38.852272] ffff888018d32b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.853137] ================================================================== [ 38.854083] Disabling lock debugging due to kernel taint [ 41.180775] BUG: Bad rss-counter state mm:00000000cb5ab1d5 type:MM_FILEPAGES val:33 [ 41.182350] BUG: Bad rss-counter state mm:00000000cb5ab1d5 type:MM_ANONPAGES val:22 [ 41.663213] BUG: Bad rss-counter state mm:0000000092406f3e type:MM_FILEPAGES val:33 [ 41.664399] BUG: Bad rss-counter state mm:0000000092406f3e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24280' (ECDSA) to the list of known hosts. 2023/06/21 08:40:10 fuzzer started 2023/06/21 08:40:10 dialing manager at localhost:36067 2023/06/21 08:40:10 checking machine... 2023/06/21 08:40:10 checking revisions... [ 42.400958] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:40:11 testing simple program... [ 42.472837] cgroup: Unknown subsys name 'net' [ 42.559270] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:40:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000254 RCX=0000000000000000 RDX=ffff88800f9a3680 RSI=0000000000000002 RDI=0000000000000000 RBP=ffff888015857f58 RSP=ffff888015857ed0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=00007f76efc528c0 R14=0000000000000002 R15=ffff8880143a9bc0 RIP=ffffffff814c0430 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f76f083b900 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=00007f76efc528c0 CR3=000000000c91e000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0c31d0ebce833d3f00000000000ae988 XMM05=dc6fc7942506aca00000000000135128 XMM06=e4cb8bb95a7664b60000000000133f88 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffea90f9000 CR3=000000000e606000 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