syzkaller login: [ 30.733770] BUG: Bad rss-counter state mm:0000000053327066 type:MM_FILEPAGES val:33 [ 30.735021] BUG: Bad rss-counter state mm:0000000053327066 type:MM_ANONPAGES val:22 [ 30.889061] ================================================================== [ 30.890073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.891012] Read of size 8 at addr ffff88800f52d968 by task sshd/220 [ 30.891883] [ 30.892105] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.892976] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.893993] Call Trace: [ 30.894315] [ 30.894596] dump_stack_lvl+0x91/0xf0 [ 30.895084] print_report+0xcc/0x620 [ 30.895574] ? __virt_addr_valid+0x102/0x340 [ 30.896133] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.896770] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.897390] kasan_report+0xbe/0xf0 [ 30.897863] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.898484] vma_interval_tree_remove+0xc75/0xec0 [ 30.899086] vma_prepare+0xc54/0x11a0 [ 30.899562] __split_vma+0x5af/0x950 [ 30.900031] ? __pfx___split_vma+0x10/0x10 [ 30.900555] ? find_held_lock+0x2c/0x110 [ 30.901103] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.901664] ? lock_is_held_type+0x9f/0x120 [ 30.902200] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.902812] ? mtree_range_walk+0x632/0x900 [ 30.903384] ? mas_walk+0x5c7/0x7c0 [ 30.903870] do_vmi_munmap+0x1f1/0x2b0 [ 30.904364] mmap_region+0x1f9/0x2660 [ 30.904860] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.905375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.906110] ? __pfx_lock_acquire+0x10/0x10 [ 30.906646] ? __pfx_mmap_region+0x10/0x10 [ 30.907182] ? security_mmap_addr+0x7d/0xa0 [ 30.907713] ? get_unmapped_area+0x1f5/0x3f0 [ 30.908271] do_mmap+0x854/0xf00 [ 30.908721] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.909222] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.909784] ksys_mmap_pgoff+0x3af/0x500 [ 30.910302] do_syscall_64+0x3f/0x90 [ 30.910795] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.911436] RIP: 0033:0x7f7452e4ed82 [ 30.911887] 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 [ 30.914008] RSP: 002b:00007fff739e6738 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.914905] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7452e4ed82 [ 30.915741] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7452288000 [ 30.916584] RBP: 00007f7452288000 R08: 0000000000000009 R09: 0000000000001000 [ 30.917419] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560002e4bec0 [ 30.918255] R13: 00007fff739e6750 R14: 00007fff739e6780 R15: 00007fff739e6ae0 [ 30.919101] [ 30.919390] [ 30.919603] Allocated by task 213: [ 30.920027] kasan_save_stack+0x22/0x50 [ 30.920526] kasan_set_track+0x25/0x30 [ 30.921045] __kasan_slab_alloc+0x59/0x70 [ 30.921562] kmem_cache_alloc+0x16b/0x370 [ 30.922074] vm_area_dup+0x20/0x160 [ 30.922528] __split_vma+0x170/0x950 [ 30.922987] split_vma+0xc6/0x110 [ 30.923421] mprotect_fixup+0x8d2/0xb30 [ 30.923921] do_mprotect_pkey+0x87e/0xd40 [ 30.924434] __x64_sys_mprotect+0x78/0xc0 [ 30.924957] do_syscall_64+0x3f/0x90 [ 30.925427] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.926061] [ 30.926275] Freed by task 203: [ 30.926662] kasan_save_stack+0x22/0x50 [ 30.927166] kasan_set_track+0x25/0x30 [ 30.927653] kasan_save_free_info+0x2b/0x50 [ 30.928177] __kasan_slab_free+0x10a/0x190 [ 30.928710] kmem_cache_free+0x10d/0x4d0 [ 30.929216] rcu_core+0x8c8/0x2860 [ 30.929654] __do_softirq+0x1b7/0x7d4 [ 30.930130] [ 30.930344] Last potentially related work creation: [ 30.930925] kasan_save_stack+0x22/0x50 [ 30.931425] __kasan_record_aux_stack+0x8e/0xa0 [ 30.931996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.932649] remove_vma+0x139/0x170 [ 30.933123] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.933657] do_vmi_munmap+0x1f1/0x2b0 [ 30.934116] __vm_munmap+0x138/0x3a0 [ 30.934557] __x64_sys_munmap+0x59/0x80 [ 30.935031] do_syscall_64+0x3f/0x90 [ 30.935483] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.936100] [ 30.936306] Second to last potentially related work creation: [ 30.936957] kasan_save_stack+0x22/0x50 [ 30.937433] __kasan_record_aux_stack+0x8e/0xa0 [ 30.937974] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.938582] remove_vma+0x139/0x170 [ 30.939010] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.939539] do_vmi_munmap+0x1f1/0x2b0 [ 30.939999] mmap_region+0x1f9/0x2660 [ 30.940451] do_mmap+0x854/0xf00 [ 30.940865] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.941330] ksys_mmap_pgoff+0x3af/0x500 [ 30.941803] do_syscall_64+0x3f/0x90 [ 30.942272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942919] [ 30.943134] The buggy address belongs to the object at ffff88800f52d910 [ 30.943134] which belongs to the cache vm_area_struct of size 168 [ 30.944624] The buggy address is located 88 bytes inside of [ 30.944624] freed 168-byte region [ffff88800f52d910, ffff88800f52d9b8) [ 30.946034] [ 30.946249] The buggy address belongs to the physical page: [ 30.946910] page:00000000ed136360 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf52d [ 30.947987] memcg:ffff88800c4ddc01 [ 30.948414] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.949127] page_type: 0xffffffff() [ 30.949584] raw: 0100000000000200 ffff8880087a0c80 ffffea0000373d40 0000000000000005 [ 30.950479] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4ddc01 [ 30.951386] page dumped because: kasan: bad access detected [ 30.952042] [ 30.952257] Memory state around the buggy address: [ 30.952857] ffff88800f52d800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.953713] ffff88800f52d880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.954569] >ffff88800f52d900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.955412] ^ [ 30.956186] ffff88800f52d980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 30.957059] ffff88800f52da00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.957903] ================================================================== [ 30.958874] Disabling lock debugging due to kernel taint [ 32.980958] BUG: Bad rss-counter state mm:00000000822f3a80 type:MM_FILEPAGES val:33 [ 32.981912] BUG: Bad rss-counter state mm:00000000822f3a80 type:MM_ANONPAGES val:22 [ 33.388442] BUG: Bad rss-counter state mm:000000001dd39773 type:MM_FILEPAGES val:33 [ 33.389763] BUG: Bad rss-counter state mm:000000001dd39773 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43759' (ECDSA) to the list of known hosts. 2023/06/20 20:49:20 fuzzer started 2023/06/20 20:49:20 dialing manager at localhost:36067 2023/06/20 20:49:21 checking machine... 2023/06/20 20:49:21 checking revisions... [ 34.157605] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:49:21 testing simple program... [ 34.208935] cgroup: Unknown subsys name 'net' [ 34.262506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:49:20 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f5b65ab43b0 CR3=000000000e5a0000 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=2030323a39343a3032203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a39343a3032203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88801a343e60 RCX=ffff88800844f780 RDX=ffffea000036cb00 RSI=0000000000000008 RDI=ffffffff81806333 RBP=0000000000000000 RSP=ffff888019d9fa38 R8 =ffff88800db2c5f0 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000d000c R12=dffffc0000000000 R13=ffff888019d9fa78 R14=ffff88800844f780 R15=ffff88800db2c720 RIP=ffffffff81810316 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 00007f2c10331900 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=00007ffd82cd7000 CR3=000000000e708000 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=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