syzkaller login: [ 31.184307] BUG: Bad rss-counter state mm:00000000a189782c type:MM_FILEPAGES val:33 [ 31.185319] BUG: Bad rss-counter state mm:00000000a189782c type:MM_ANONPAGES val:22 [ 31.347642] ================================================================== [ 31.348731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.349838] Read of size 8 at addr ffff88800e09f140 by task sshd/221 [ 31.350829] [ 31.351084] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.352005] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.352982] Call Trace: [ 31.353304] [ 31.353583] dump_stack_lvl+0x91/0xf0 [ 31.354071] print_report+0xcc/0x620 [ 31.354572] ? __virt_addr_valid+0x102/0x340 [ 31.355126] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.355799] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.356417] kasan_report+0xbe/0xf0 [ 31.356894] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.357527] vma_interval_tree_remove+0xc75/0xec0 [ 31.358172] vma_prepare+0xc54/0x11a0 [ 31.358663] __split_vma+0x5af/0x950 [ 31.359153] ? __pfx___split_vma+0x10/0x10 [ 31.359758] ? find_held_lock+0x2c/0x110 [ 31.360322] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.360941] ? lock_is_held_type+0x9f/0x120 [ 31.361502] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.362134] ? mtree_range_walk+0x632/0x900 [ 31.362711] ? mas_walk+0x5c7/0x7c0 [ 31.363207] do_vmi_munmap+0x1f1/0x2b0 [ 31.363757] mmap_region+0x1f9/0x2660 [ 31.364260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.364837] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.365580] ? __pfx_lock_acquire+0x10/0x10 [ 31.366127] ? __pfx_mmap_region+0x10/0x10 [ 31.366675] ? security_mmap_addr+0x7d/0xa0 [ 31.367240] ? get_unmapped_area+0x1f5/0x3f0 [ 31.367830] do_mmap+0x854/0xf00 [ 31.368290] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.368842] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.369429] ksys_mmap_pgoff+0x3af/0x500 [ 31.369950] do_syscall_64+0x3f/0x90 [ 31.370447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.371130] RIP: 0033:0x7ff7381add82 [ 31.371621] 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 [ 31.373877] RSP: 002b:00007ffd84f95988 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.374827] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff7381add82 [ 31.375731] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff7375e7000 [ 31.376614] RBP: 00007ff7375e7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.377516] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd33248ec0 [ 31.378415] R13: 00007ffd84f959a0 R14: 00007ffd84f959d0 R15: 00007ffd84f95d30 [ 31.379308] [ 31.379633] [ 31.379854] Allocated by task 214: [ 31.380307] kasan_save_stack+0x22/0x50 [ 31.380833] kasan_set_track+0x25/0x30 [ 31.381351] __kasan_slab_alloc+0x59/0x70 [ 31.381946] kmem_cache_alloc+0x16b/0x370 [ 31.382484] vm_area_dup+0x20/0x160 [ 31.382955] __split_vma+0x170/0x950 [ 31.383446] split_vma+0xc6/0x110 [ 31.383913] mprotect_fixup+0x8d2/0xb30 [ 31.384430] do_mprotect_pkey+0x87e/0xd40 [ 31.384977] __x64_sys_mprotect+0x78/0xc0 [ 31.385528] do_syscall_64+0x3f/0x90 [ 31.386057] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.386733] [ 31.386955] Freed by task 19: [ 31.387358] kasan_save_stack+0x22/0x50 [ 31.387911] kasan_set_track+0x25/0x30 [ 31.388425] kasan_save_free_info+0x2b/0x50 [ 31.388977] __kasan_slab_free+0x10a/0x190 [ 31.389540] kmem_cache_free+0x10d/0x4d0 [ 31.390096] rcu_core+0x8c8/0x2860 [ 31.390573] __do_softirq+0x1b7/0x7d4 [ 31.391070] [ 31.391297] Last potentially related work creation: [ 31.391929] kasan_save_stack+0x22/0x50 [ 31.392465] __kasan_record_aux_stack+0x8e/0xa0 [ 31.393056] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.393736] remove_vma+0x139/0x170 [ 31.394231] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.394815] do_vmi_munmap+0x1f1/0x2b0 [ 31.395329] __vm_munmap+0x138/0x3a0 [ 31.395850] __x64_sys_munmap+0x59/0x80 [ 31.396370] do_syscall_64+0x3f/0x90 [ 31.396861] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.397529] [ 31.397782] The buggy address belongs to the object at ffff88800e09f0e8 [ 31.397782] which belongs to the cache vm_area_struct of size 168 [ 31.399323] The buggy address is located 88 bytes inside of [ 31.399323] freed 168-byte region [ffff88800e09f0e8, ffff88800e09f190) [ 31.400826] [ 31.401046] The buggy address belongs to the physical page: [ 31.401755] page:00000000a1a07390 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe09f [ 31.402902] memcg:ffff88800e03c201 [ 31.403354] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.404057] page_type: 0xffffffff() [ 31.404529] raw: 0100000000000200 ffff8880087a0c80 ffffea0000277780 dead000000000006 [ 31.405479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e03c201 [ 31.406466] page dumped because: kasan: bad access detected [ 31.407162] [ 31.407404] Memory state around the buggy address: [ 31.408025] ffff88800e09f000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.408920] ffff88800e09f080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 31.409865] >ffff88800e09f100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.410768] ^ [ 31.411447] ffff88800e09f180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 31.412334] ffff88800e09f200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 31.413217] ================================================================== [ 31.414245] Disabling lock debugging due to kernel taint [ 33.650217] BUG: Bad rss-counter state mm:00000000a5a5abaa type:MM_FILEPAGES val:33 [ 33.651381] BUG: Bad rss-counter state mm:00000000a5a5abaa type:MM_ANONPAGES val:22 [ 34.040468] BUG: Bad rss-counter state mm:0000000028a72aea type:MM_FILEPAGES val:33 [ 34.041466] BUG: Bad rss-counter state mm:0000000028a72aea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7494' (ECDSA) to the list of known hosts. 2023/06/21 02:37:00 fuzzer started 2023/06/21 02:37:00 dialing manager at localhost:36067 2023/06/21 02:37:00 checking machine... 2023/06/21 02:37:00 checking revisions... [ 34.760962] kmemleak: Automatic memory scanning thread ended 2023/06/21 02:37:00 testing simple program... [ 34.809876] cgroup: Unknown subsys name 'net' [ 34.851124] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:36:59 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff85652b60 RCX=0000000000000000 RDX=1ffffffff0aca581 RSI=ffffffff814c84af RDI=0000000000000005 RBP=0000000000000000 RSP=ffff8880180df0e8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=00007ff9f2406366 R13=0000000000000000 R14=ffffffff85652c08 R15=0000000000092cc0 RIP=ffffffff814c84cb 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 00007ff9f1f13900 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=00007ffc9cf37000 CR3=00000000099f6000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=0000000000000001 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=00007f5ac9a9ebe0 CR3=0000000016d0a000 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=2039353a36333a3230203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039353a36333a3230203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000