[ 32.378151] BUG: Bad rss-counter state mm:0000000027d1cbc8 type:MM_FILEPAGES val:33 [ 32.378834] BUG: Bad rss-counter state mm:0000000027d1cbc8 type:MM_ANONPAGES val:22 [ 32.578674] ================================================================== [ 32.579319] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.579951] Read of size 8 at addr ffff88800e53aa50 by task sshd/221 [ 32.580448] [ 32.580581] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.581170] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.586637] Call Trace: [ 32.586900] [ 32.587088] dump_stack_lvl+0x91/0xf0 [ 32.587412] print_report+0xcc/0x620 [ 32.587779] ? __virt_addr_valid+0x102/0x340 [ 32.588253] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.588659] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.589110] kasan_report+0xbe/0xf0 [ 32.589527] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.590005] vma_interval_tree_remove+0xc75/0xec0 [ 32.590398] vma_prepare+0xc54/0x11a0 [ 32.590750] __split_vma+0x5af/0x950 [ 32.591089] ? __pfx___split_vma+0x10/0x10 [ 32.591424] ? find_held_lock+0x2c/0x110 [ 32.591806] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.592175] ? lock_is_held_type+0x9f/0x120 [ 32.592523] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.592957] ? mtree_range_walk+0x632/0x900 [ 32.593367] ? mas_walk+0x5c7/0x7c0 [ 32.593685] do_vmi_munmap+0x1f1/0x2b0 [ 32.594073] mmap_region+0x1f9/0x2660 [ 32.594385] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.594780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.595286] ? __pfx_lock_acquire+0x10/0x10 [ 32.595636] ? __pfx_mmap_region+0x10/0x10 [ 32.596024] ? security_mmap_addr+0x7d/0xa0 [ 32.596367] ? get_unmapped_area+0x1f5/0x3f0 [ 32.596771] do_mmap+0x854/0xf00 [ 32.597066] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.597592] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.598008] ksys_mmap_pgoff+0x3af/0x500 [ 32.598338] do_syscall_64+0x3f/0x90 [ 32.598651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.599114] RIP: 0033:0x7fd79f4b8d82 [ 32.599416] 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 [ 32.600868] RSP: 002b:00007fff73473ba8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.601480] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd79f4b8d82 [ 32.602121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd79e8f2000 [ 32.602651] RBP: 00007fd79e8f2000 R08: 0000000000000009 R09: 0000000000001000 [ 32.603219] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560f2d919ec0 [ 32.603793] R13: 00007fff73473bc0 R14: 00007fff73473bf0 R15: 00007fff73473f50 [ 32.604339] [ 32.604525] [ 32.604663] Allocated by task 212: [ 32.605016] kasan_save_stack+0x22/0x50 [ 32.605362] kasan_set_track+0x25/0x30 [ 32.605755] __kasan_slab_alloc+0x59/0x70 [ 32.606096] kmem_cache_alloc+0x16b/0x370 [ 32.606429] vm_area_dup+0x20/0x160 [ 32.606772] __split_vma+0x170/0x950 [ 32.607081] split_vma+0xc6/0x110 [ 32.607370] mprotect_fixup+0x8d2/0xb30 [ 32.607693] do_mprotect_pkey+0x87e/0xd40 [ 32.608080] __x64_sys_mprotect+0x78/0xc0 [ 32.608419] do_syscall_64+0x3f/0x90 [ 32.608777] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.609201] [ 32.609363] Freed by task 212: [ 32.609621] kasan_save_stack+0x22/0x50 [ 32.610026] kasan_set_track+0x25/0x30 [ 32.610342] kasan_save_free_info+0x2b/0x50 [ 32.610680] __kasan_slab_free+0x10a/0x190 [ 32.611074] kmem_cache_free+0x10d/0x4d0 [ 32.611400] rcu_core+0x8c8/0x2860 [ 32.611686] __do_softirq+0x1b7/0x7d4 [ 32.612103] [ 32.612258] Last potentially related work creation: [ 32.612680] kasan_save_stack+0x22/0x50 [ 32.613049] __kasan_record_aux_stack+0x8e/0xa0 [ 32.613464] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.613974] remove_vma+0x139/0x170 [ 32.614298] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.614656] do_vmi_munmap+0x1f1/0x2b0 [ 32.615084] __vm_munmap+0x138/0x3a0 [ 32.615379] __x64_sys_munmap+0x59/0x80 [ 32.615743] do_syscall_64+0x3f/0x90 [ 32.616060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.616474] [ 32.616614] The buggy address belongs to the object at ffff88800e53a9f8 [ 32.616614] which belongs to the cache vm_area_struct of size 168 [ 32.617650] The buggy address is located 88 bytes inside of [ 32.617650] freed 168-byte region [ffff88800e53a9f8, ffff88800e53aaa0) [ 32.618613] [ 32.618796] The buggy address belongs to the physical page: [ 32.619205] page:000000004d16d220 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe53a [ 32.619943] memcg:ffff88800e10ff01 [ 32.620220] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.620663] page_type: 0xffffffff() [ 32.620991] raw: 0100000000000200 ffff88800879fc80 ffffea0000356f40 dead000000000007 [ 32.621609] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e10ff01 [ 32.622264] page dumped because: kasan: bad access detected [ 32.622685] [ 32.622900] Memory state around the buggy address: [ 32.623319] ffff88800e53a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.623904] ffff88800e53a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 32.624514] >ffff88800e53aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.625164] ^ [ 32.625666] ffff88800e53aa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.626292] ffff88800e53ab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.626925] ================================================================== [ 32.641439] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.232623] BUG: Bad rss-counter state mm:000000003f83dd34 type:MM_FILEPAGES val:33 [ 35.234128] BUG: Bad rss-counter state mm:000000003f83dd34 type:MM_ANONPAGES val:22 [ 35.967034] BUG: Bad rss-counter state mm:00000000bff22026 type:MM_FILEPAGES val:33 [ 35.968044] BUG: Bad rss-counter state mm:00000000bff22026 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61260' (ECDSA) to the list of known hosts. 2023/06/20 10:09:02 fuzzer started 2023/06/20 10:09:02 dialing manager at localhost:44161 2023/06/20 10:09:02 checking machine... 2023/06/20 10:09:02 checking revisions... [ 36.897561] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:09:03 testing simple program... [ 36.952664] cgroup: Unknown subsys name 'net' [ 37.028606] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:00 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=00007fa43828f410 CR3=0000000009d3a000 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=2032303a39303a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a39303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000001 RDX=0000000000000001 RSI=ffffffff84506c7f RDI=ffff888017597830 RBP=ffff888017597888 RSP=ffff8880175977c0 R8 =0000000000000001 R9 =ffff888017597870 R10=0000000000038001 R11=000000000000774d R12=ffff888017597890 R13=ffff888017597878 R14=ffff888017597871 R15=ffff888017597830 RIP=ffffffff811306ec 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 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=00007f3e61518328 CR3=0000000005482000 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=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