syzkaller login: [ 50.178982] BUG: Bad rss-counter state mm:0000000080b3f523 type:MM_FILEPAGES val:33 [ 50.180355] BUG: Bad rss-counter state mm:0000000080b3f523 type:MM_ANONPAGES val:22 [ 50.325761] ================================================================== [ 50.326664] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 50.327586] Read of size 8 at addr ffff88800e0b1058 by task sshd/222 [ 50.328344] [ 50.328575] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 50.329575] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 50.330543] Call Trace: [ 50.330914] [ 50.331197] dump_stack_lvl+0x91/0xf0 [ 50.331679] print_report+0xcc/0x620 [ 50.332174] ? __virt_addr_valid+0x102/0x340 [ 50.332764] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.333371] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.333976] kasan_report+0xbe/0xf0 [ 50.334450] ? vma_interval_tree_remove+0xc75/0xec0 [ 50.335065] vma_interval_tree_remove+0xc75/0xec0 [ 50.335664] vma_prepare+0xc54/0x11a0 [ 50.336149] __split_vma+0x5af/0x950 [ 50.336630] ? __pfx___split_vma+0x10/0x10 [ 50.337161] ? find_held_lock+0x2c/0x110 [ 50.337672] do_vmi_align_munmap+0x2ba/0x11f0 [ 50.338235] ? lock_is_held_type+0x9f/0x120 [ 50.338768] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 50.339371] ? mtree_range_walk+0x632/0x900 [ 50.339912] ? mas_walk+0x5c7/0x7c0 [ 50.340391] do_vmi_munmap+0x1f1/0x2b0 [ 50.340890] mmap_region+0x1f9/0x2660 [ 50.341373] ? vm_mmap_pgoff+0x15c/0x3a0 [ 50.341883] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 50.342590] ? __pfx_lock_acquire+0x10/0x10 [ 50.343117] ? __pfx_mmap_region+0x10/0x10 [ 50.343641] ? security_mmap_addr+0x7d/0xa0 [ 50.344168] ? get_unmapped_area+0x1f5/0x3f0 [ 50.344734] do_mmap+0x854/0xf00 [ 50.345180] vm_mmap_pgoff+0x1a6/0x3a0 [ 50.345667] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 50.346227] ksys_mmap_pgoff+0x3af/0x500 [ 50.346729] do_syscall_64+0x3f/0x90 [ 50.347199] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.347835] RIP: 0033:0x7f6c1c3fed82 [ 50.348292] 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 [ 50.350407] RSP: 002b:00007ffc059eae58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 50.351305] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6c1c3fed82 [ 50.352146] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6c1b838000 [ 50.353000] RBP: 00007f6c1b838000 R08: 0000000000000009 R09: 0000000000001000 [ 50.353831] R10: 0000000000000812 R11: 0000000000000206 R12: 00005599ea6f5f70 [ 50.354661] R13: 00007ffc059eae70 R14: 00007ffc059eaea0 R15: 00007ffc059eb200 [ 50.355502] [ 50.355789] [ 50.356001] Allocated by task 215: [ 50.356427] kasan_save_stack+0x22/0x50 [ 50.356931] kasan_set_track+0x25/0x30 [ 50.357426] __kasan_slab_alloc+0x59/0x70 [ 50.357949] kmem_cache_alloc+0x16b/0x370 [ 50.358463] vm_area_dup+0x20/0x160 [ 50.358919] __split_vma+0x170/0x950 [ 50.359386] split_vma+0xc6/0x110 [ 50.359826] mprotect_fixup+0x8d2/0xb30 [ 50.360323] do_mprotect_pkey+0x87e/0xd40 [ 50.360849] __x64_sys_mprotect+0x78/0xc0 [ 50.361362] do_syscall_64+0x3f/0x90 [ 50.361833] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.362475] [ 50.362696] Freed by task 215: [ 50.363088] kasan_save_stack+0x22/0x50 [ 50.363583] kasan_set_track+0x25/0x30 [ 50.364073] kasan_save_free_info+0x2b/0x50 [ 50.364610] __kasan_slab_free+0x10a/0x190 [ 50.365153] kmem_cache_free+0x10d/0x4d0 [ 50.365653] rcu_core+0x8c8/0x2860 [ 50.366246] __do_softirq+0x1b7/0x7d4 [ 50.366888] [ 50.367181] Last potentially related work creation: [ 50.367970] kasan_save_stack+0x22/0x50 [ 50.368643] __kasan_record_aux_stack+0x8e/0xa0 [ 50.369436] __call_rcu_common.constprop.0+0x6a/0xb90 [ 50.370302] remove_vma+0x139/0x170 [ 50.370920] do_vmi_align_munmap+0xd4a/0x11f0 [ 50.371669] do_vmi_munmap+0x1f1/0x2b0 [ 50.372343] __vm_munmap+0x138/0x3a0 [ 50.372995] __x64_sys_munmap+0x59/0x80 [ 50.373670] do_syscall_64+0x3f/0x90 [ 50.374315] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 50.375174] [ 50.375464] The buggy address belongs to the object at ffff88800e0b1000 [ 50.375464] which belongs to the cache vm_area_struct of size 168 [ 50.377493] The buggy address is located 88 bytes inside of [ 50.377493] freed 168-byte region [ffff88800e0b1000, ffff88800e0b10a8) [ 50.379406] [ 50.379694] The buggy address belongs to the physical page: [ 50.380596] page:00000000cf62fe8f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0b1 [ 50.382067] memcg:ffff88800c60f201 [ 50.382641] flags: 0x100000000000200(slab|node=0|zone=1) [ 50.383515] page_type: 0xffffffff() [ 50.384124] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 50.385401] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c60f201 [ 50.386632] page dumped because: kasan: bad access detected [ 50.387536] [ 50.387829] Memory state around the buggy address: [ 50.388633] ffff88800e0b0f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 50.389793] ffff88800e0b0f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 50.390931] >ffff88800e0b1000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.392059] ^ [ 50.393052] ffff88800e0b1080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 50.394200] ffff88800e0b1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 50.395353] ================================================================== [ 50.396787] Disabling lock debugging due to kernel taint [ 52.214308] BUG: Bad rss-counter state mm:00000000e08bf345 type:MM_FILEPAGES val:33 [ 52.215012] BUG: Bad rss-counter state mm:00000000e08bf345 type:MM_ANONPAGES val:22 [ 52.572638] BUG: Bad rss-counter state mm:0000000016c1b99c type:MM_FILEPAGES val:33 [ 52.573377] BUG: Bad rss-counter state mm:0000000016c1b99c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26784' (ECDSA) to the list of known hosts. 2023/06/19 13:06:49 fuzzer started 2023/06/19 13:06:49 dialing manager at localhost:44161 2023/06/19 13:06:49 checking machine... 2023/06/19 13:06:49 checking revisions... [ 53.239070] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:06:49 testing simple program... [ 53.285123] cgroup: Unknown subsys name 'net' [ 53.341447] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:06:29 Registers: info registers vcpu 0 RAX=ffffffff83677d48 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f247a01 RSI=ffff88800f247a70 RDI=ffff88800f247a70 RBP=ffff88800f247700 RSP=ffff88800f247638 R8 =ffffffff86137008 R9 =ffff88800f2476e8 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88800f247708 R13=ffff88800f2476f0 R14=ffff88800f247a78 R15=ffff88800f2476a8 RIP=ffffffff81131041 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 00007f6da88ce900 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=00007fff43bb3000 CR3=000000000f09e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f5142dd9a40 CR3=000000000d60e000 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=9c6311f97348a8812843c4cd99cc2e63 XMM02=ec2efd57dc4c00df000000000011f448 XMM03=8a33728b225c448d000000000011f518 XMM04=41f3195ab97e25e400000000000ae988 XMM05=59d5b690e0af863b0000000000133758 XMM06=6f6ca1acd3e21e0800000000001325c0 XMM07=e042d86d42eb936e0000000000123ed8 XMM08=8a33728b225c448d000000000011f518 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000