syzkaller login: [ 40.808963] BUG: Bad rss-counter state mm:0000000041f28c0c type:MM_FILEPAGES val:33 [ 40.810252] BUG: Bad rss-counter state mm:0000000041f28c0c type:MM_ANONPAGES val:22 [ 40.929639] ================================================================== [ 40.930614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.931631] Read of size 8 at addr ffff88800d6ef228 by task sshd/219 [ 40.932537] [ 40.932773] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.933696] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.934762] Call Trace: [ 40.935102] [ 40.935412] dump_stack_lvl+0x91/0xf0 [ 40.935935] print_report+0xcc/0x620 [ 40.936450] ? __virt_addr_valid+0x102/0x340 [ 40.937034] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.937689] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.938340] kasan_report+0xbe/0xf0 [ 40.938874] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.939542] vma_interval_tree_remove+0xc75/0xec0 [ 40.940197] vma_prepare+0xc54/0x11a0 [ 40.940732] __split_vma+0x5af/0x950 [ 40.941256] ? __pfx___split_vma+0x10/0x10 [ 40.941841] ? find_held_lock+0x2c/0x110 [ 40.942407] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.943047] ? lock_is_held_type+0x9f/0x120 [ 40.943645] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.944302] ? mtree_range_walk+0x632/0x900 [ 40.944903] ? mas_walk+0x5c7/0x7c0 [ 40.945421] do_vmi_munmap+0x1f1/0x2b0 [ 40.945962] mmap_region+0x1f9/0x2660 [ 40.946490] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.947063] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.947841] ? __pfx_lock_acquire+0x10/0x10 [ 40.948431] ? __pfx_mmap_region+0x10/0x10 [ 40.949010] ? security_mmap_addr+0x7d/0xa0 [ 40.949586] ? get_unmapped_area+0x1f5/0x3f0 [ 40.950188] do_mmap+0x854/0xf00 [ 40.950674] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.951218] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.951830] ksys_mmap_pgoff+0x3af/0x500 [ 40.952379] do_syscall_64+0x3f/0x90 [ 40.952886] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.953587] RIP: 0033:0x7f2c4e3a2d82 [ 40.954078] 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 [ 40.956362] RSP: 002b:00007fff2e7a6ed8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.957322] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2c4e3a2d82 [ 40.958235] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2c4d7dc000 [ 40.959164] RBP: 00007f2c4d7dc000 R08: 0000000000000009 R09: 0000000000001000 [ 40.960070] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d5d4de1980 [ 40.960971] R13: 00007fff2e7a6ef0 R14: 00007fff2e7a6f20 R15: 00007fff2e7a7280 [ 40.961886] [ 40.962196] [ 40.962433] Allocated by task 212: [ 40.962928] kasan_save_stack+0x22/0x50 [ 40.963470] kasan_set_track+0x25/0x30 [ 40.963998] __kasan_slab_alloc+0x59/0x70 [ 40.964556] kmem_cache_alloc+0x16b/0x370 [ 40.965105] vm_area_dup+0x20/0x160 [ 40.965587] __split_vma+0x170/0x950 [ 40.966084] split_vma+0xc6/0x110 [ 40.966559] mprotect_fixup+0x8d2/0xb30 [ 40.967094] do_mprotect_pkey+0x87e/0xd40 [ 40.967652] __x64_sys_mprotect+0x78/0xc0 [ 40.968206] do_syscall_64+0x3f/0x90 [ 40.968707] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.969388] [ 40.969617] Freed by task 212: [ 40.970032] kasan_save_stack+0x22/0x50 [ 40.970585] kasan_set_track+0x25/0x30 [ 40.971108] kasan_save_free_info+0x2b/0x50 [ 40.971680] __kasan_slab_free+0x10a/0x190 [ 40.972245] kmem_cache_free+0x10d/0x4d0 [ 40.972788] rcu_core+0x8c8/0x2860 [ 40.973260] __do_softirq+0x1b7/0x7d4 [ 40.973769] [ 40.973998] Last potentially related work creation: [ 40.974639] kasan_save_stack+0x22/0x50 [ 40.975178] __kasan_record_aux_stack+0x8e/0xa0 [ 40.975786] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.976479] remove_vma+0x139/0x170 [ 40.976957] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.977548] do_vmi_munmap+0x1f1/0x2b0 [ 40.978064] __vm_munmap+0x138/0x3a0 [ 40.978566] __x64_sys_munmap+0x59/0x80 [ 40.979096] do_syscall_64+0x3f/0x90 [ 40.979599] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.980281] [ 40.980509] Second to last potentially related work creation: [ 40.981233] kasan_save_stack+0x22/0x50 [ 40.981769] __kasan_record_aux_stack+0x8e/0xa0 [ 40.982379] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.983082] remove_vma+0x139/0x170 [ 40.983569] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.984164] do_vmi_munmap+0x1f1/0x2b0 [ 40.984682] mmap_region+0x1f9/0x2660 [ 40.985200] do_mmap+0x854/0xf00 [ 40.985657] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.986187] ksys_mmap_pgoff+0x3af/0x500 [ 40.986730] do_syscall_64+0x3f/0x90 [ 40.987234] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.987927] [ 40.988155] The buggy address belongs to the object at ffff88800d6ef1d0 [ 40.988155] which belongs to the cache vm_area_struct of size 168 [ 40.989726] The buggy address is located 88 bytes inside of [ 40.989726] freed 168-byte region [ffff88800d6ef1d0, ffff88800d6ef278) [ 40.991241] [ 40.991469] The buggy address belongs to the physical page: [ 40.992172] page:000000005852e34e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6ef [ 40.993334] memcg:ffff888009a08e01 [ 40.993789] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.994477] page_type: 0xffffffff() [ 40.994969] raw: 0100000000000200 ffff88800879fc80 ffffea0000598400 dead000000000006 [ 40.995951] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a08e01 [ 40.996924] page dumped because: kasan: bad access detected [ 40.997640] [ 40.997869] Memory state around the buggy address: [ 40.998512] ffff88800d6ef100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.999426] ffff88800d6ef180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 41.000340] >ffff88800d6ef200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 41.001248] ^ [ 41.001848] ffff88800d6ef280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 41.002779] ffff88800d6ef300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 41.003705] ================================================================== [ 41.004872] Disabling lock debugging due to kernel taint [ 43.091917] BUG: Bad rss-counter state mm:00000000c36ed50b type:MM_FILEPAGES val:33 [ 43.093223] BUG: Bad rss-counter state mm:00000000c36ed50b type:MM_ANONPAGES val:22 [ 43.502620] BUG: Bad rss-counter state mm:00000000741f987b type:MM_FILEPAGES val:33 [ 43.503376] BUG: Bad rss-counter state mm:00000000741f987b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:5515' (ECDSA) to the list of known hosts. 2023/06/20 02:01:50 fuzzer started 2023/06/20 02:01:50 dialing manager at localhost:44161 2023/06/20 02:01:50 checking machine... 2023/06/20 02:01:50 checking revisions... [ 44.206592] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:01:50 testing simple program... [ 44.261370] cgroup: Unknown subsys name 'net' [ 44.321656] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:01:44 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=00007f69812db7e0 CR3=0000000018bb4000 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=2039343a31303a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31303a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bbf8d4 RBX=ffffffff85dfc6a4 RCX=ffffffff81809910 RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a4 RSP=ffff88806cf09988 R8 =ffffffff86137004 R9 =ffff88806cf09a80 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007fdc82db5900 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=00007fff763b8000 CR3=000000001a33e000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000