syzkaller login: [ 31.551708] BUG: Bad rss-counter state mm:00000000f700f3b8 type:MM_FILEPAGES val:33 [ 31.552735] BUG: Bad rss-counter state mm:00000000f700f3b8 type:MM_ANONPAGES val:22 [ 31.738191] ================================================================== [ 31.739120] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.740115] Read of size 8 at addr ffff88800e9e2ed8 by task sshd/220 [ 31.740905] [ 31.741127] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.742141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.743169] Call Trace: [ 31.743636] [ 31.743991] dump_stack_lvl+0x91/0xf0 [ 31.744590] print_report+0xcc/0x620 [ 31.745178] ? __virt_addr_valid+0x102/0x340 [ 31.745850] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.746597] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.747339] kasan_report+0xbe/0xf0 [ 31.747964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.748746] vma_interval_tree_remove+0xc75/0xec0 [ 31.749510] vma_prepare+0xc54/0x11a0 [ 31.750109] __split_vma+0x5af/0x950 [ 31.750710] ? __pfx___split_vma+0x10/0x10 [ 31.751380] ? find_held_lock+0x2c/0x110 [ 31.752052] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.752753] ? lock_is_held_type+0x9f/0x120 [ 31.753424] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.754182] ? mtree_range_walk+0x632/0x900 [ 31.754866] ? mas_walk+0x5c7/0x7c0 [ 31.755480] do_vmi_munmap+0x1f1/0x2b0 [ 31.756101] mmap_region+0x1f9/0x2660 [ 31.756681] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.757244] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.758032] ? __pfx_lock_acquire+0x10/0x10 [ 31.758619] ? __pfx_mmap_region+0x10/0x10 [ 31.759201] ? security_mmap_addr+0x7d/0xa0 [ 31.759793] ? get_unmapped_area+0x1f5/0x3f0 [ 31.760398] do_mmap+0x854/0xf00 [ 31.760882] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.761429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.762047] ksys_mmap_pgoff+0x3af/0x500 [ 31.762614] do_syscall_64+0x3f/0x90 [ 31.763146] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.763876] RIP: 0033:0x7f91b8545d82 [ 31.764383] 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 [ 31.766741] RSP: 002b:00007ffde80dddd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.767762] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f91b8545d82 [ 31.768697] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f91b797f000 [ 31.769631] RBP: 00007f91b797f000 R08: 0000000000000009 R09: 0000000000001000 [ 31.770566] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d38a4c0b20 [ 31.771504] R13: 00007ffde80dddf0 R14: 00007ffde80dde20 R15: 00007ffde80de180 [ 31.772445] [ 31.772757] [ 31.773008] Allocated by task 213: [ 31.773485] kasan_save_stack+0x22/0x50 [ 31.774042] kasan_set_track+0x25/0x30 [ 31.774590] __kasan_slab_alloc+0x59/0x70 [ 31.775161] kmem_cache_alloc+0x16b/0x370 [ 31.775744] vm_area_dup+0x20/0x160 [ 31.776241] __split_vma+0x170/0x950 [ 31.776749] split_vma+0xc6/0x110 [ 31.777228] mprotect_fixup+0x8d2/0xb30 [ 31.777774] do_mprotect_pkey+0x87e/0xd40 [ 31.778344] __x64_sys_mprotect+0x78/0xc0 [ 31.778920] do_syscall_64+0x3f/0x90 [ 31.779447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.780162] [ 31.780398] Freed by task 213: [ 31.780830] kasan_save_stack+0x22/0x50 [ 31.781386] kasan_set_track+0x25/0x30 [ 31.781931] kasan_save_free_info+0x2b/0x50 [ 31.782517] __kasan_slab_free+0x10a/0x190 [ 31.783106] kmem_cache_free+0x10d/0x4d0 [ 31.783680] rcu_core+0x8c8/0x2860 [ 31.784168] __do_softirq+0x1b7/0x7d4 [ 31.784696] [ 31.784934] Last potentially related work creation: [ 31.785584] kasan_save_stack+0x22/0x50 [ 31.786144] __kasan_record_aux_stack+0x8e/0xa0 [ 31.786776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.787494] remove_vma+0x139/0x170 [ 31.787995] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.788610] do_vmi_munmap+0x1f1/0x2b0 [ 31.789145] __vm_munmap+0x138/0x3a0 [ 31.789663] __x64_sys_munmap+0x59/0x80 [ 31.790216] do_syscall_64+0x3f/0x90 [ 31.790733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.791438] [ 31.791690] Second to last potentially related work creation: [ 31.792448] kasan_save_stack+0x22/0x50 [ 31.793002] __kasan_record_aux_stack+0x8e/0xa0 [ 31.793634] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.794343] remove_vma+0x139/0x170 [ 31.794837] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.795467] do_vmi_munmap+0x1f1/0x2b0 [ 31.796008] mmap_region+0x1f9/0x2660 [ 31.796536] do_mmap+0x854/0xf00 [ 31.797013] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.797554] ksys_mmap_pgoff+0x3af/0x500 [ 31.798107] do_syscall_64+0x3f/0x90 [ 31.798626] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.799334] [ 31.799574] The buggy address belongs to the object at ffff88800e9e2e80 [ 31.799574] which belongs to the cache vm_area_struct of size 168 [ 31.801200] The buggy address is located 88 bytes inside of [ 31.801200] freed 168-byte region [ffff88800e9e2e80, ffff88800e9e2f28) [ 31.802760] [ 31.802996] The buggy address belongs to the physical page: [ 31.803734] page:000000006c19a7fc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe9e2 [ 31.804923] memcg:ffff88800f0f5b01 [ 31.805393] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.806107] page_type: 0xffffffff() [ 31.806610] raw: 0100000000000200 ffff88800879fc80 ffffea00003b5000 dead000000000006 [ 31.807642] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0f5b01 [ 31.808648] page dumped because: kasan: bad access detected [ 31.809386] [ 31.809622] Memory state around the buggy address: [ 31.810263] ffff88800e9e2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.811215] ffff88800e9e2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 31.812168] >ffff88800e9e2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.813109] ^ [ 31.813918] ffff88800e9e2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 31.814866] ffff88800e9e2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 31.815824] ================================================================== [ 31.816965] Disabling lock debugging due to kernel taint [ 33.724944] BUG: Bad rss-counter state mm:0000000041b2d236 type:MM_FILEPAGES val:33 [ 33.725705] BUG: Bad rss-counter state mm:0000000041b2d236 type:MM_ANONPAGES val:22 [ 34.183872] BUG: Bad rss-counter state mm:00000000151c9b59 type:MM_FILEPAGES val:33 [ 34.184883] BUG: Bad rss-counter state mm:00000000151c9b59 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44888' (ECDSA) to the list of known hosts. 2023/06/20 07:37:19 fuzzer started 2023/06/20 07:37:19 dialing manager at localhost:44161 2023/06/20 07:37:19 checking machine... 2023/06/20 07:37:19 checking revisions... [ 34.853401] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:37:19 testing simple program... [ 34.903841] cgroup: Unknown subsys name 'net' [ 34.950529] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:37:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fde5d785ff0 CR3=000000000ddaa000 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=2038313a37333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a37333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=0000000000000000 RDX=ffff88800f179b40 RSI=0000000000000008 RDI=ffff8880095e2578 RBP=1ffff11001f7de98 RSP=ffff88800fbef4b0 R8 =0000000000000004 R9 =000000000000000c R10=000000000000000c R11=000009f0000009f0 R12=ffff8880095e2578 R13=ffffffff83c5ecc4 R14=0000000000000000 R15=000000000000000c RIP=ffffffff812d8689 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 00007f20d8ac0900 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=00007ffc9787e000 CR3=000000000e406000 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=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