syzkaller login: [ 30.314804] BUG: Bad rss-counter state mm:000000003a5e8ff3 type:MM_FILEPAGES val:33 [ 30.315851] BUG: Bad rss-counter state mm:000000003a5e8ff3 type:MM_ANONPAGES val:22 [ 30.358452] ================================================================== [ 30.359349] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.360363] Read of size 8 at addr ffff88800c6a6798 by task sshd/221 [ 30.361049] [ 30.361240] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.362009] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.362883] Call Trace: [ 30.363197] [ 30.363472] dump_stack_lvl+0x91/0xf0 [ 30.363977] print_report+0xcc/0x620 [ 30.364407] ? __virt_addr_valid+0x102/0x340 [ 30.364898] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.365449] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.365998] kasan_report+0xbe/0xf0 [ 30.366422] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.366986] vma_interval_tree_remove+0xc75/0xec0 [ 30.367534] vma_prepare+0xc54/0x11a0 [ 30.367971] __split_vma+0x5af/0x950 [ 30.368409] ? __pfx___split_vma+0x10/0x10 [ 30.368889] ? find_held_lock+0x2c/0x110 [ 30.369364] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.369876] ? lock_is_held_type+0x9f/0x120 [ 30.370368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.370945] ? mtree_range_walk+0x632/0x900 [ 30.371441] ? mas_walk+0x5c7/0x7c0 [ 30.371878] do_vmi_munmap+0x1f1/0x2b0 [ 30.372331] mmap_region+0x1f9/0x2660 [ 30.372775] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.373238] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.373897] ? __pfx_lock_acquire+0x10/0x10 [ 30.374376] ? __pfx_mmap_region+0x10/0x10 [ 30.374865] ? security_mmap_addr+0x7d/0xa0 [ 30.375350] ? get_unmapped_area+0x1f5/0x3f0 [ 30.375847] do_mmap+0x854/0xf00 [ 30.376252] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.376711] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.377217] ksys_mmap_pgoff+0x3af/0x500 [ 30.377676] do_syscall_64+0x3f/0x90 [ 30.378110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.378706] RIP: 0033:0x7fdbabb91d82 [ 30.379129] 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 [ 30.381058] RSP: 002b:00007ffe52dd5218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.381892] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fdbabb91d82 [ 30.382645] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fdbaafcb000 [ 30.383436] RBP: 00007fdbaafcb000 R08: 0000000000000009 R09: 0000000000001000 [ 30.384203] R10: 0000000000000812 R11: 0000000000000206 R12: 00005587aca72b20 [ 30.384953] R13: 00007ffe52dd5230 R14: 00007ffe52dd5260 R15: 00007ffe52dd55c0 [ 30.385712] [ 30.385968] [ 30.386161] Allocated by task 214: [ 30.386546] kasan_save_stack+0x22/0x50 [ 30.387003] kasan_set_track+0x25/0x30 [ 30.387439] __kasan_slab_alloc+0x59/0x70 [ 30.387906] kmem_cache_alloc+0x16b/0x370 [ 30.388367] vm_area_dup+0x20/0x160 [ 30.388768] __split_vma+0x170/0x950 [ 30.389178] split_vma+0xc6/0x110 [ 30.389568] mprotect_fixup+0x8d2/0xb30 [ 30.390018] do_mprotect_pkey+0x87e/0xd40 [ 30.390485] __x64_sys_mprotect+0x78/0xc0 [ 30.390964] do_syscall_64+0x3f/0x90 [ 30.391393] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.391963] [ 30.392154] Freed by task 214: [ 30.392505] kasan_save_stack+0x22/0x50 [ 30.392948] kasan_set_track+0x25/0x30 [ 30.393389] kasan_save_free_info+0x2b/0x50 [ 30.393873] __kasan_slab_free+0x10a/0x190 [ 30.394359] kmem_cache_free+0x10d/0x4d0 [ 30.394829] rcu_core+0x8c8/0x2860 [ 30.395231] __do_softirq+0x1b7/0x7d4 [ 30.395668] [ 30.395863] Last potentially related work creation: [ 30.396396] kasan_save_stack+0x22/0x50 [ 30.396849] __kasan_record_aux_stack+0x8e/0xa0 [ 30.397370] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.397949] remove_vma+0x139/0x170 [ 30.398360] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.398886] do_vmi_munmap+0x1f1/0x2b0 [ 30.399322] __vm_munmap+0x138/0x3a0 [ 30.399743] __x64_sys_munmap+0x59/0x80 [ 30.400202] do_syscall_64+0x3f/0x90 [ 30.400632] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.401224] [ 30.401422] The buggy address belongs to the object at ffff88800c6a6740 [ 30.401422] which belongs to the cache vm_area_struct of size 168 [ 30.402795] The buggy address is located 88 bytes inside of [ 30.402795] freed 168-byte region [ffff88800c6a6740, ffff88800c6a67e8) [ 30.404094] [ 30.404288] The buggy address belongs to the physical page: [ 30.404888] page:00000000412f56f8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6a6 [ 30.405891] memcg:ffff88800c6a7001 [ 30.406280] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.406878] page_type: 0xffffffff() [ 30.407289] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.408132] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6a7001 [ 30.408957] page dumped because: kasan: bad access detected [ 30.409566] [ 30.409767] Memory state around the buggy address: [ 30.410305] ffff88800c6a6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.411098] ffff88800c6a6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.411891] >ffff88800c6a6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.412679] ^ [ 30.413130] ffff88800c6a6800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.413906] ffff88800c6a6880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.414715] ================================================================== [ 30.415816] Disabling lock debugging due to kernel taint [ 33.265420] BUG: Bad rss-counter state mm:00000000f08b3a10 type:MM_FILEPAGES val:33 [ 33.266552] BUG: Bad rss-counter state mm:00000000f08b3a10 type:MM_ANONPAGES val:22 [ 33.720234] BUG: Bad rss-counter state mm:0000000049df9d51 type:MM_FILEPAGES val:33 [ 33.721221] BUG: Bad rss-counter state mm:0000000049df9d51 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:53778' (ECDSA) to the list of known hosts. 2023/06/21 04:25:56 fuzzer started 2023/06/21 04:25:56 dialing manager at localhost:36067 2023/06/21 04:25:56 checking machine... 2023/06/21 04:25:56 checking revisions... [ 34.355597] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:25:56 testing simple program... [ 34.396004] cgroup: Unknown subsys name 'net' [ 34.445512] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:25:55 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f5efb14d000 RCX=0000000000000100 RDX=ffff8880158b51c0 RSI=00007f5efb14d000 RDI=ffffffffff600000 RBP=0000000000000001 RSP=ffff88806ce099f8 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000001 R11=00000000000b6a61 R12=ffff88806ce09b40 R13=0000000000000000 R14=ffff8880158b51c0 R15=ffff88800f60a380 RIP=ffffffff814c0430 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f5efac5b900 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=00007f5efb210650 CR3=000000000fd78000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffffffff857f9d88 RCX=0000000000000000 RDX=1ffffffff0aff3a5 RSI=ffffffff81f99b81 RDI=ffffffff857f9d28 RBP=ffff888016477790 RSP=ffff8880164776f0 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=ffff888018285b84 R13=000000000000007c R14=0000000000000000 R15=ffff888016477790 RIP=ffffffff81f99b9a 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 00007f846794a700 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=00007fe274edc0f0 CR3=000000000ff1c000 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=2035353a35323a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a35323a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000