[ 25.279397] BUG: Bad rss-counter state mm:000000003b92f232 type:MM_FILEPAGES val:33 [ 25.280682] BUG: Bad rss-counter state mm:000000003b92f232 type:MM_ANONPAGES val:22 [ 25.319277] ================================================================== [ 25.319947] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.320625] Read of size 8 at addr ffff88800d750c20 by task sshd/219 [ 25.321168] [ 25.321328] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.321937] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.322634] Call Trace: [ 25.322861] <TASK> [ 25.323063] dump_stack_lvl+0x91/0xf0 [ 25.323412] print_report+0xcc/0x620 [ 25.323761] ? __virt_addr_valid+0x102/0x340 [ 25.324324] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.324766] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.325208] kasan_report+0xbe/0xf0 [ 25.325550] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.325992] vma_interval_tree_remove+0xc75/0xec0 [ 25.326436] vma_prepare+0xc54/0x11a0 [ 25.326780] __split_vma+0x5af/0x950 [ 25.327120] ? __pfx___split_vma+0x10/0x10 [ 25.327499] ? find_held_lock+0x2c/0x110 [ 25.327887] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.328293] ? lock_is_held_type+0x9f/0x120 [ 25.328682] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.329118] ? mtree_range_walk+0x632/0x900 [ 25.329515] ? mas_walk+0x5c7/0x7c0 [ 25.329853] do_vmi_munmap+0x1f1/0x2b0 [ 25.330208] mmap_region+0x1f9/0x2660 [ 25.330556] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.330922] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.331431] ? __pfx_lock_acquire+0x10/0x10 [ 25.331820] ? __pfx_mmap_region+0x10/0x10 [ 25.332200] ? security_mmap_addr+0x7d/0xa0 [ 25.332581] ? get_unmapped_area+0x1f5/0x3f0 [ 25.332976] do_mmap+0x854/0xf00 [ 25.333296] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.333649] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.334049] ksys_mmap_pgoff+0x3af/0x500 [ 25.334413] do_syscall_64+0x3f/0x90 [ 25.334747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.335208] RIP: 0033:0x7f2407c74d82 [ 25.335532] 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 [ 25.337055] RSP: 002b:00007fff0ebfc798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.337698] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2407c74d82 [ 25.338298] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f24070ae000 [ 25.338897] RBP: 00007f24070ae000 R08: 0000000000000009 R09: 0000000000001000 [ 25.339495] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef096b1ec0 [ 25.340113] R13: 00007fff0ebfc7b0 R14: 00007fff0ebfc7e0 R15: 00007fff0ebfcb40 [ 25.340721] </TASK> [ 25.340926] [ 25.341077] Allocated by task 212: [ 25.341380] kasan_save_stack+0x22/0x50 [ 25.341736] kasan_set_track+0x25/0x30 [ 25.342084] __kasan_slab_alloc+0x59/0x70 [ 25.342452] kmem_cache_alloc+0x16b/0x370 [ 25.342818] vm_area_dup+0x20/0x160 [ 25.343139] __split_vma+0x170/0x950 [ 25.343467] split_vma+0xc6/0x110 [ 25.343782] mprotect_fixup+0x8d2/0xb30 [ 25.344137] do_mprotect_pkey+0x87e/0xd40 [ 25.344506] __x64_sys_mprotect+0x78/0xc0 [ 25.344872] do_syscall_64+0x3f/0x90 [ 25.345207] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.345662] [ 25.345813] Freed by task 203: [ 25.346091] kasan_save_stack+0x22/0x50 [ 25.346454] kasan_set_track+0x25/0x30 [ 25.346807] kasan_save_free_info+0x2b/0x50 [ 25.347183] __kasan_slab_free+0x10a/0x190 [ 25.347566] kmem_cache_free+0x10d/0x4d0 [ 25.347933] rcu_core+0x8c8/0x2860 [ 25.348248] __do_softirq+0x1b7/0x7d4 [ 25.348587] [ 25.348738] Last potentially related work creation: [ 25.349151] kasan_save_stack+0x22/0x50 [ 25.349512] __kasan_record_aux_stack+0x8e/0xa0 [ 25.349919] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.350370] remove_vma+0x139/0x170 [ 25.350690] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.351080] do_vmi_munmap+0x1f1/0x2b0 [ 25.351424] __vm_munmap+0x138/0x3a0 [ 25.351754] __x64_sys_munmap+0x59/0x80 [ 25.352116] do_syscall_64+0x3f/0x90 [ 25.352451] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.352903] [ 25.353054] Second to last potentially related work creation: [ 25.353537] kasan_save_stack+0x22/0x50 [ 25.353893] __kasan_record_aux_stack+0x8e/0xa0 [ 25.354297] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.354750] remove_vma+0x139/0x170 [ 25.355071] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.355463] do_vmi_munmap+0x1f1/0x2b0 [ 25.355813] mmap_region+0x1f9/0x2660 [ 25.356150] do_mmap+0x854/0xf00 [ 25.356451] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.356797] ksys_mmap_pgoff+0x3af/0x500 [ 25.357148] do_syscall_64+0x3f/0x90 [ 25.357482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.357931] [ 25.358085] The buggy address belongs to the object at ffff88800d750bc8 [ 25.358085] which belongs to the cache vm_area_struct of size 168 [ 25.359128] The buggy address is located 88 bytes inside of [ 25.359128] freed 168-byte region [ffff88800d750bc8, ffff88800d750c70) [ 25.360127] [ 25.360279] The buggy address belongs to the physical page: [ 25.360746] page:000000008f7f992f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd750 [ 25.361520] memcg:ffff88800daea201 [ 25.361823] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.362319] page_type: 0xffffffff() [ 25.362637] raw: 0100000000000200 ffff88800879fc80 ffffea0000394c40 dead000000000005 [ 25.363283] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800daea201 [ 25.363938] page dumped because: kasan: bad access detected [ 25.364406] [ 25.364558] Memory state around the buggy address: [ 25.364969] ffff88800d750b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.365582] ffff88800d750b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 25.366195] >ffff88800d750c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 25.366795] ^ [ 25.367171] ffff88800d750c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 25.367779] ffff88800d750d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 25.368391] ================================================================== [ 25.369073] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.135253] BUG: Bad rss-counter state mm:00000000924e042b type:MM_FILEPAGES val:33 [ 27.136512] BUG: Bad rss-counter state mm:00000000924e042b type:MM_ANONPAGES val:22 [ 27.556487] BUG: Bad rss-counter state mm:000000000a81dcda type:MM_FILEPAGES val:33 [ 27.557470] BUG: Bad rss-counter state mm:000000000a81dcda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3700' (ECDSA) to the list of known hosts. 2023/06/20 08:51:27 fuzzer started 2023/06/20 08:51:28 dialing manager at localhost:44161 2023/06/20 08:51:28 checking machine... 2023/06/20 08:51:28 checking revisions... [ 28.353271] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:51:28 testing simple program... [ 28.401185] cgroup: Unknown subsys name 'net' [ 28.447925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:51:26 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=0000000000000001 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=00007f5e298638b8 CR3=000000000f2ee000 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=2037323a31353a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a31353a3830203032 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=ffffffff844c0cea RDI=ffff88800ff96f98 RBP=ffff88800ff96ff0 RSP=ffff88800ff96f28 R8 =0000000000000001 R9 =ffff88800ff96fd8 R10=0000000000038001 R11=00000000000b3e90 R12=ffff88800ff96ff8 R13=ffff88800ff96fe0 R14=ffff88800ff96fd9 R15=ffff88800ff96f98 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 00007fc8f76db900 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=00007fc8f76ba020 CR3=000000000e7dc000 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