syzkaller login: [ 30.633907] BUG: Bad rss-counter state mm:000000001525f33d type:MM_FILEPAGES val:33 [ 30.635345] BUG: Bad rss-counter state mm:000000001525f33d type:MM_ANONPAGES val:22 [ 30.821482] ================================================================== [ 30.822593] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.823625] Read of size 8 at addr ffff888015831140 by task sshd/220 [ 30.824492] [ 30.824730] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.825686] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.826766] Call Trace: [ 30.827118] <TASK> [ 30.827437] dump_stack_lvl+0x91/0xf0 [ 30.827983] print_report+0xcc/0x620 [ 30.828535] ? __virt_addr_valid+0x102/0x340 [ 30.829146] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.829826] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.830514] kasan_report+0xbe/0xf0 [ 30.831050] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.831735] vma_interval_tree_remove+0xc75/0xec0 [ 30.832407] vma_prepare+0xc54/0x11a0 [ 30.832966] __split_vma+0x5af/0x950 [ 30.833494] ? __pfx___split_vma+0x10/0x10 [ 30.834088] ? find_held_lock+0x2c/0x110 [ 30.834664] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.835288] ? lock_is_held_type+0x9f/0x120 [ 30.835885] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.836569] ? mtree_range_walk+0x632/0x900 [ 30.837177] ? mas_walk+0x5c7/0x7c0 [ 30.837701] do_vmi_munmap+0x1f1/0x2b0 [ 30.838243] mmap_region+0x1f9/0x2660 [ 30.838773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.839341] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.840132] ? __pfx_lock_acquire+0x10/0x10 [ 30.840742] ? __pfx_mmap_region+0x10/0x10 [ 30.841328] ? security_mmap_addr+0x7d/0xa0 [ 30.841917] ? get_unmapped_area+0x1f5/0x3f0 [ 30.842524] do_mmap+0x854/0xf00 [ 30.843013] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.843561] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.844178] ksys_mmap_pgoff+0x3af/0x500 [ 30.844750] do_syscall_64+0x3f/0x90 [ 30.845273] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845992] RIP: 0033:0x7f264c233d82 [ 30.846505] 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 [ 30.848882] RSP: 002b:00007ffd0235c2a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.849893] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f264c233d82 [ 30.850835] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f264b66d000 [ 30.851771] RBP: 00007f264b66d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.852719] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d0b17aaec0 [ 30.853671] R13: 00007ffd0235c2c0 R14: 00007ffd0235c2f0 R15: 00007ffd0235c650 [ 30.854621] </TASK> [ 30.854945] [ 30.855180] Allocated by task 213: [ 30.855662] kasan_save_stack+0x22/0x50 [ 30.856223] kasan_set_track+0x25/0x30 [ 30.856760] __kasan_slab_alloc+0x59/0x70 [ 30.857324] kmem_cache_alloc+0x16b/0x370 [ 30.857874] vm_area_dup+0x20/0x160 [ 30.858358] __split_vma+0x170/0x950 [ 30.858854] split_vma+0xc6/0x110 [ 30.859318] mprotect_fixup+0x8d2/0xb30 [ 30.859860] do_mprotect_pkey+0x87e/0xd40 [ 30.860422] __x64_sys_mprotect+0x78/0xc0 [ 30.861003] do_syscall_64+0x3f/0x90 [ 30.861511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.862207] [ 30.862444] Freed by task 213: [ 30.862878] kasan_save_stack+0x22/0x50 [ 30.863438] kasan_set_track+0x25/0x30 [ 30.863978] kasan_save_free_info+0x2b/0x50 [ 30.864568] __kasan_slab_free+0x10a/0x190 [ 30.865139] kmem_cache_free+0x10d/0x4d0 [ 30.865677] rcu_core+0x8c8/0x2860 [ 30.866154] __do_softirq+0x1b7/0x7d4 [ 30.866666] [ 30.866894] Last potentially related work creation: [ 30.867516] kasan_save_stack+0x22/0x50 [ 30.868046] __kasan_record_aux_stack+0x8e/0xa0 [ 30.868664] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.869351] remove_vma+0x139/0x170 [ 30.869827] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.870419] do_vmi_munmap+0x1f1/0x2b0 [ 30.870931] __vm_munmap+0x138/0x3a0 [ 30.871424] __x64_sys_munmap+0x59/0x80 [ 30.871949] do_syscall_64+0x3f/0x90 [ 30.872450] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.873150] [ 30.873384] Second to last potentially related work creation: [ 30.874111] kasan_save_stack+0x22/0x50 [ 30.874643] __kasan_record_aux_stack+0x8e/0xa0 [ 30.875253] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.875935] remove_vma+0x139/0x170 [ 30.876413] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.877006] do_vmi_munmap+0x1f1/0x2b0 [ 30.877523] mmap_region+0x1f9/0x2660 [ 30.878033] do_mmap+0x854/0xf00 [ 30.878495] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.879014] ksys_mmap_pgoff+0x3af/0x500 [ 30.879551] do_syscall_64+0x3f/0x90 [ 30.880055] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.880760] [ 30.880991] The buggy address belongs to the object at ffff8880158310e8 [ 30.880991] which belongs to the cache vm_area_struct of size 168 [ 30.882557] The buggy address is located 88 bytes inside of [ 30.882557] freed 168-byte region [ffff8880158310e8, ffff888015831190) [ 30.884050] [ 30.884280] The buggy address belongs to the physical page: [ 30.884991] page:00000000f4eebe3a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15831 [ 30.886149] memcg:ffff888019f2c301 [ 30.886603] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.887297] page_type: 0xffffffff() [ 30.887777] raw: 0100000000000200 ffff88800879fc80 ffffea00003969c0 dead000000000004 [ 30.888763] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f2c301 [ 30.889730] page dumped because: kasan: bad access detected [ 30.890434] [ 30.890665] Memory state around the buggy address: [ 30.891284] ffff888015831000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.892184] ffff888015831080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.893115] >ffff888015831100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.894030] ^ [ 30.894703] ffff888015831180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 30.895609] ffff888015831200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 30.896515] ================================================================== [ 30.897756] Disabling lock debugging due to kernel taint [ 33.088743] BUG: Bad rss-counter state mm:000000007e241cc4 type:MM_FILEPAGES val:33 [ 33.090225] BUG: Bad rss-counter state mm:000000007e241cc4 type:MM_ANONPAGES val:22 [ 33.591341] BUG: Bad rss-counter state mm:000000000fd65a05 type:MM_FILEPAGES val:33 [ 33.592569] BUG: Bad rss-counter state mm:000000000fd65a05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:36544' (ECDSA) to the list of known hosts. 2023/06/20 05:11:50 fuzzer started 2023/06/20 05:11:50 dialing manager at localhost:44161 2023/06/20 05:11:50 checking machine... 2023/06/20 05:11:50 checking revisions... [ 34.397632] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:11:50 testing simple program... [ 34.442246] cgroup: Unknown subsys name 'net' [ 34.481914] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:11:50 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff81807eba RDX=000000000000807e RSI=000000000000807e RDI=ffffffff86507db8 RBP=ffff888014307270 RSP=ffff8880143071a8 R8 =0000000000000000 R9 =ffff888014307258 R10=0000000000038001 R11=0000000000020de7 R12=ffff888014307278 R13=ffff888014307260 R14=ffff888014307259 R15=ffff888014307218 RIP=ffffffff8113077a RFL=00000216 [----AP-] 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 00007f2d81d0d900 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=00007f2d81149300 CR3=000000000d5cc000 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=e0524aeb6f46d2fc00000000000ae988 XMM05=fa03b2990f4f711200000000001365e8 XMM06=19e9129bd510f2350000000000135480 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbe4ef RBX=ffffffff85df2778 RCX=ffffffff81745a68 RDX=0000000000000000 RSI=ffffffff86128130 RDI=ffffffff85df276c RBP=ffffffff85df2778 RSP=ffff88801ce2ef98 R8 =ffffffff86128130 R9 =ffff88801ce2f090 R10=0000000000038001 R11=000000000001e4e6 R12=ffffffff85df277c R13=ffffffff85df276c R14=ffffffff85df2774 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000212 [----A--] 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 00007f82d85fa900 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=00007f82d85d9020 CR3=000000000daf2000 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=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