syzkaller login: [ 30.635514] BUG: Bad rss-counter state mm:000000003babc618 type:MM_FILEPAGES val:33 [ 30.637329] BUG: Bad rss-counter state mm:000000003babc618 type:MM_ANONPAGES val:22 [ 30.803021] ================================================================== [ 30.803936] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.804878] Read of size 8 at addr ffff888019f7f798 by task sshd/220 [ 30.805658] [ 30.805881] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.806835] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.807812] Call Trace: [ 30.808166] [ 30.808456] dump_stack_lvl+0x91/0xf0 [ 30.808959] print_report+0xcc/0x620 [ 30.809450] ? __virt_addr_valid+0x102/0x340 [ 30.810012] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.810632] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.811256] kasan_report+0xbe/0xf0 [ 30.811743] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.812369] vma_interval_tree_remove+0xc75/0xec0 [ 30.812977] vma_prepare+0xc54/0x11a0 [ 30.813457] __split_vma+0x5af/0x950 [ 30.813935] ? __pfx___split_vma+0x10/0x10 [ 30.814461] ? find_held_lock+0x2c/0x110 [ 30.814986] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.815552] ? lock_is_held_type+0x9f/0x120 [ 30.816085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.816689] ? mtree_range_walk+0x632/0x900 [ 30.817245] ? mas_walk+0x5c7/0x7c0 [ 30.817718] do_vmi_munmap+0x1f1/0x2b0 [ 30.818231] mmap_region+0x1f9/0x2660 [ 30.818712] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.819229] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.819941] ? __pfx_lock_acquire+0x10/0x10 [ 30.820470] ? __pfx_mmap_region+0x10/0x10 [ 30.821009] ? security_mmap_addr+0x7d/0xa0 [ 30.821540] ? get_unmapped_area+0x1f5/0x3f0 [ 30.822106] do_mmap+0x854/0xf00 [ 30.822551] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.823044] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.823615] ksys_mmap_pgoff+0x3af/0x500 [ 30.824127] do_syscall_64+0x3f/0x90 [ 30.824611] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.825271] RIP: 0033:0x7f11ec582d82 [ 30.825726] 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 [ 30.827876] RSP: 002b:00007ffe5f205a38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.828789] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f11ec582d82 [ 30.829640] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f11eb9bc000 [ 30.830517] RBP: 00007f11eb9bc000 R08: 0000000000000009 R09: 0000000000001000 [ 30.831373] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ccab8beec0 [ 30.832217] R13: 00007ffe5f205a50 R14: 00007ffe5f205a80 R15: 00007ffe5f205de0 [ 30.833075] [ 30.833364] [ 30.833579] Allocated by task 213: [ 30.834012] kasan_save_stack+0x22/0x50 [ 30.834517] kasan_set_track+0x25/0x30 [ 30.835010] __kasan_slab_alloc+0x59/0x70 [ 30.835532] kmem_cache_alloc+0x16b/0x370 [ 30.836047] vm_area_dup+0x20/0x160 [ 30.836495] __split_vma+0x170/0x950 [ 30.836960] split_vma+0xc6/0x110 [ 30.837396] mprotect_fixup+0x8d2/0xb30 [ 30.837921] do_mprotect_pkey+0x87e/0xd40 [ 30.838442] __x64_sys_mprotect+0x78/0xc0 [ 30.838960] do_syscall_64+0x3f/0x90 [ 30.839435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.840080] [ 30.840294] Freed by task 19: [ 30.840674] kasan_save_stack+0x22/0x50 [ 30.841176] kasan_set_track+0x25/0x30 [ 30.841675] kasan_save_free_info+0x2b/0x50 [ 30.842215] __kasan_slab_free+0x10a/0x190 [ 30.842746] kmem_cache_free+0x10d/0x4d0 [ 30.843253] rcu_core+0x8c8/0x2860 [ 30.843697] __do_softirq+0x1b7/0x7d4 [ 30.844174] [ 30.844389] Last potentially related work creation: [ 30.844971] kasan_save_stack+0x22/0x50 [ 30.845473] __kasan_record_aux_stack+0x8e/0xa0 [ 30.846052] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.846694] remove_vma+0x139/0x170 [ 30.847151] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.847705] do_vmi_munmap+0x1f1/0x2b0 [ 30.848188] __vm_munmap+0x138/0x3a0 [ 30.848657] __x64_sys_munmap+0x59/0x80 [ 30.849151] do_syscall_64+0x3f/0x90 [ 30.849627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.850288] [ 30.850503] Second to last potentially related work creation: [ 30.851195] kasan_save_stack+0x22/0x50 [ 30.851692] __kasan_record_aux_stack+0x8e/0xa0 [ 30.852262] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.852905] remove_vma+0x139/0x170 [ 30.853355] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.853913] do_vmi_munmap+0x1f1/0x2b0 [ 30.854402] mmap_region+0x1f9/0x2660 [ 30.854893] do_mmap+0x854/0xf00 [ 30.855329] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.855816] ksys_mmap_pgoff+0x3af/0x500 [ 30.856320] do_syscall_64+0x3f/0x90 [ 30.856796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.857446] [ 30.857665] The buggy address belongs to the object at ffff888019f7f740 [ 30.857665] which belongs to the cache vm_area_struct of size 168 [ 30.859140] The buggy address is located 88 bytes inside of [ 30.859140] freed 168-byte region [ffff888019f7f740, ffff888019f7f7e8) [ 30.860554] [ 30.860772] The buggy address belongs to the physical page: [ 30.861426] page:0000000076aae985 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f7f [ 30.862534] memcg:ffff88800f704701 [ 30.862964] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.863604] page_type: 0xffffffff() [ 30.864056] raw: 0100000000000200 ffff8880087a0c80 ffffea00005a7880 dead000000000004 [ 30.864972] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f704701 [ 30.865876] page dumped because: kasan: bad access detected [ 30.866555] [ 30.866770] Memory state around the buggy address: [ 30.867353] ffff888019f7f680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.868202] ffff888019f7f700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.869055] >ffff888019f7f780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.869912] ^ [ 30.870412] ffff888019f7f800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 30.871268] ffff888019f7f880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 30.872120] ================================================================== [ 30.873088] Disabling lock debugging due to kernel taint [ 32.762416] BUG: Bad rss-counter state mm:0000000015438304 type:MM_FILEPAGES val:33 [ 32.763419] BUG: Bad rss-counter state mm:0000000015438304 type:MM_ANONPAGES val:22 [ 33.237418] BUG: Bad rss-counter state mm:000000003bac61de type:MM_FILEPAGES val:33 [ 33.238534] BUG: Bad rss-counter state mm:000000003bac61de type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14425' (ECDSA) to the list of known hosts. 2023/06/20 16:06:00 fuzzer started 2023/06/20 16:06:01 dialing manager at localhost:36067 2023/06/20 16:06:01 checking machine... 2023/06/20 16:06:01 checking revisions... [ 34.042817] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:06:01 testing simple program... [ 34.103680] cgroup: Unknown subsys name 'net' [ 34.143262] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:06:00 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=00007f6c024d0500 CR3=0000000019c7e000 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=2030303a36303a3631203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a36303a3631203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800f138001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88800f137801 RSI=ffff88800f137878 RDI=ffff88800f1373b8 RBP=ffff88800f137400 RSP=ffff88800f137330 R8 =ffffffff863b7290 R9 =ffff88800f1373e8 R10=0000000000038001 R11=000000000008b396 R12=ffff88800f137408 R13=ffff88800f1373f0 R14=ffff88800f137880 R15=ffff88800f1373a8 RIP=ffffffff811304d5 RFL=00000282 [--S----] 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 00007f98ae676900 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=00007ffdde2c6000 CR3=000000001a0e8000 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