[ 24.085623] BUG: Bad rss-counter state mm:000000008b188084 type:MM_FILEPAGES val:33 [ 24.087070] BUG: Bad rss-counter state mm:000000008b188084 type:MM_ANONPAGES val:22 [ 24.234652] ================================================================== [ 24.235614] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.236604] Read of size 8 at addr ffff88800ebf34e0 by task sshd/218 [ 24.237422] [ 24.237776] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.238669] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.239690] Call Trace: [ 24.240049] [ 24.240345] dump_stack_lvl+0x91/0xf0 [ 24.240857] print_report+0xcc/0x620 [ 24.241359] ? __virt_addr_valid+0x102/0x340 [ 24.241918] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.242564] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.243192] kasan_report+0xbe/0xf0 [ 24.243679] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.244337] vma_interval_tree_remove+0xc75/0xec0 [ 24.244968] vma_prepare+0xc54/0x11a0 [ 24.245470] __split_vma+0x5af/0x950 [ 24.245967] ? __pfx___split_vma+0x10/0x10 [ 24.246514] ? find_held_lock+0x2c/0x110 [ 24.247058] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.247651] ? lock_is_held_type+0x9f/0x120 [ 24.248232] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.248861] ? mtree_range_walk+0x632/0x900 [ 24.249437] ? mas_walk+0x5c7/0x7c0 [ 24.249928] do_vmi_munmap+0x1f1/0x2b0 [ 24.250437] mmap_region+0x1f9/0x2660 [ 24.250937] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.251465] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.252220] ? __pfx_lock_acquire+0x10/0x10 [ 24.252780] ? __pfx_mmap_region+0x10/0x10 [ 24.253329] ? security_mmap_addr+0x7d/0xa0 [ 24.253877] ? get_unmapped_area+0x1f5/0x3f0 [ 24.254450] do_mmap+0x854/0xf00 [ 24.254915] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.255426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.256023] ksys_mmap_pgoff+0x3af/0x500 [ 24.256553] do_syscall_64+0x3f/0x90 [ 24.257049] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.257717] RIP: 0033:0x7f4768613d82 [ 24.258198] 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 [ 24.260426] RSP: 002b:00007ffec2efb408 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.261362] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4768613d82 [ 24.262243] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4767a4d000 [ 24.263122] RBP: 00007f4767a4d000 R08: 0000000000000009 R09: 0000000000001000 [ 24.264003] R10: 0000000000000812 R11: 0000000000000206 R12: 00005617f1ef8ec0 [ 24.264890] R13: 00007ffec2efb420 R14: 00007ffec2efb450 R15: 00007ffec2efb7b0 [ 24.265793] [ 24.266093] [ 24.266315] Allocated by task 211: [ 24.266757] kasan_save_stack+0x22/0x50 [ 24.267280] kasan_set_track+0x25/0x30 [ 24.267789] __kasan_slab_alloc+0x59/0x70 [ 24.268355] kmem_cache_alloc+0x16b/0x370 [ 24.268897] vm_area_dup+0x20/0x160 [ 24.269373] __split_vma+0x170/0x950 [ 24.269865] split_vma+0xc6/0x110 [ 24.270320] mprotect_fixup+0x8d2/0xb30 [ 24.270843] do_mprotect_pkey+0x87e/0xd40 [ 24.271383] __x64_sys_mprotect+0x78/0xc0 [ 24.271932] do_syscall_64+0x3f/0x90 [ 24.272437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.273100] [ 24.273324] Freed by task 211: [ 24.273733] kasan_save_stack+0x22/0x50 [ 24.274256] kasan_set_track+0x25/0x30 [ 24.274769] kasan_save_free_info+0x2b/0x50 [ 24.275328] __kasan_slab_free+0x10a/0x190 [ 24.275883] kmem_cache_free+0x10d/0x4d0 [ 24.276431] rcu_core+0x8c8/0x2860 [ 24.276892] __do_softirq+0x1b7/0x7d4 [ 24.277385] [ 24.277606] Last potentially related work creation: [ 24.278222] kasan_save_stack+0x22/0x50 [ 24.278744] __kasan_record_aux_stack+0x8e/0xa0 [ 24.279334] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.280011] remove_vma+0x139/0x170 [ 24.280486] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.281057] do_vmi_munmap+0x1f1/0x2b0 [ 24.281571] __vm_munmap+0x138/0x3a0 [ 24.282060] __x64_sys_munmap+0x59/0x80 [ 24.282580] do_syscall_64+0x3f/0x90 [ 24.283071] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.283730] [ 24.283962] Second to last potentially related work creation: [ 24.284682] kasan_save_stack+0x22/0x50 [ 24.285207] __kasan_record_aux_stack+0x8e/0xa0 [ 24.285806] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.286471] remove_vma+0x139/0x170 [ 24.286944] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.287526] do_vmi_munmap+0x1f1/0x2b0 [ 24.288053] mmap_region+0x1f9/0x2660 [ 24.288557] do_mmap+0x854/0xf00 [ 24.289006] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.289522] ksys_mmap_pgoff+0x3af/0x500 [ 24.290051] do_syscall_64+0x3f/0x90 [ 24.290550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.291222] [ 24.291443] The buggy address belongs to the object at ffff88800ebf3488 [ 24.291443] which belongs to the cache vm_area_struct of size 168 [ 24.292988] The buggy address is located 88 bytes inside of [ 24.292988] freed 168-byte region [ffff88800ebf3488, ffff88800ebf3530) [ 24.294459] [ 24.294681] The buggy address belongs to the physical page: [ 24.295365] page:0000000079369cec refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebf3 [ 24.296490] memcg:ffff88800ef29001 [ 24.296927] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.297654] page_type: 0xffffffff() [ 24.298121] raw: 0100000000000200 ffff8880087a0c80 ffffea0000382940 dead000000000005 [ 24.299079] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef29001 [ 24.300049] page dumped because: kasan: bad access detected [ 24.300737] [ 24.300959] Memory state around the buggy address: [ 24.301556] ffff88800ebf3380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.302438] ffff88800ebf3400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 24.303325] >ffff88800ebf3480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.304215] ^ [ 24.305005] ffff88800ebf3500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.305899] ffff88800ebf3580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.306757] ================================================================== [ 24.308067] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.973105] BUG: Bad rss-counter state mm:00000000594d5cc9 type:MM_FILEPAGES val:33 [ 25.973749] BUG: Bad rss-counter state mm:00000000594d5cc9 type:MM_ANONPAGES val:22 [ 26.373140] BUG: Bad rss-counter state mm:0000000057734899 type:MM_FILEPAGES val:33 [ 26.374378] BUG: Bad rss-counter state mm:0000000057734899 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2544' (ECDSA) to the list of known hosts. 2023/06/20 19:35:36 fuzzer started 2023/06/20 19:35:36 dialing manager at localhost:36067 2023/06/20 19:35:36 checking machine... 2023/06/20 19:35:36 checking revisions... [ 27.112630] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:35:36 testing simple program... [ 27.150877] cgroup: Unknown subsys name 'net' [ 27.204742] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:35:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801b81c948 RCX=ffffffff812e0135 RDX=1ffff110037025aa RSI=0000000000000000 RDI=ffff88801b812d50 RBP=ffff88801b812d10 RSP=ffff88806ce09de8 R8 =0000000000000001 R9 =ffffed100d9c13ab R10=0000000000000003 R11=1ffff1100d9c7479 R12=0000000000000287 R13=ffffea00006e0700 R14=ffffffff81162a75 R15=ffff88800c9f1200 RIP=ffffffff845195a1 RFL=00000046 [---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 00007faa8c740900 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=00007ffde295c000 CR3=000000000eba4000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007f7a90639790 CR3=000000000ec62000 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=2035333a35333a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a35333a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000