[ 25.121327] BUG: Bad rss-counter state mm:000000005241253e type:MM_FILEPAGES val:33 [ 25.122514] BUG: Bad rss-counter state mm:000000005241253e type:MM_ANONPAGES val:22 [ 25.219228] ================================================================== [ 25.220276] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.221204] Read of size 8 at addr ffff88800eda8140 by task sshd/220 [ 25.222068] [ 25.222285] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.223138] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.224164] Call Trace: [ 25.224486] [ 25.224768] dump_stack_lvl+0x91/0xf0 [ 25.225267] print_report+0xcc/0x620 [ 25.225755] ? __virt_addr_valid+0x102/0x340 [ 25.226309] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.226925] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.227536] kasan_report+0xbe/0xf0 [ 25.228030] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.228645] vma_interval_tree_remove+0xc75/0xec0 [ 25.229246] vma_prepare+0xc54/0x11a0 [ 25.229725] __split_vma+0x5af/0x950 [ 25.230198] ? __pfx___split_vma+0x10/0x10 [ 25.230725] ? find_held_lock+0x2c/0x110 [ 25.231250] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.231831] ? lock_is_held_type+0x9f/0x120 [ 25.232368] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.232973] ? mtree_range_walk+0x632/0x900 [ 25.233526] ? mas_walk+0x5c7/0x7c0 [ 25.233999] do_vmi_munmap+0x1f1/0x2b0 [ 25.234492] mmap_region+0x1f9/0x2660 [ 25.234975] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.235486] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.236210] ? __pfx_lock_acquire+0x10/0x10 [ 25.236741] ? __pfx_mmap_region+0x10/0x10 [ 25.237265] ? security_mmap_addr+0x7d/0xa0 [ 25.237795] ? get_unmapped_area+0x1f5/0x3f0 [ 25.238343] do_mmap+0x854/0xf00 [ 25.238780] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.239273] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.239865] ksys_mmap_pgoff+0x3af/0x500 [ 25.240370] do_syscall_64+0x3f/0x90 [ 25.240846] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.241493] RIP: 0033:0x7f4046c2fd82 [ 25.241949] 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 [ 25.244089] RSP: 002b:00007ffc6126ee78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.244986] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4046c2fd82 [ 25.245829] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4046069000 [ 25.246667] RBP: 00007f4046069000 R08: 0000000000000009 R09: 0000000000001000 [ 25.247508] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563cdbd95ec0 [ 25.248365] R13: 00007ffc6126ee90 R14: 00007ffc6126eec0 R15: 00007ffc6126f220 [ 25.249220] [ 25.249516] [ 25.249731] Allocated by task 213: [ 25.250155] kasan_save_stack+0x22/0x50 [ 25.250663] kasan_set_track+0x25/0x30 [ 25.251155] __kasan_slab_alloc+0x59/0x70 [ 25.251705] kmem_cache_alloc+0x16b/0x370 [ 25.252227] vm_area_dup+0x20/0x160 [ 25.252679] __split_vma+0x170/0x950 [ 25.253142] split_vma+0xc6/0x110 [ 25.253578] mprotect_fixup+0x8d2/0xb30 [ 25.254083] do_mprotect_pkey+0x87e/0xd40 [ 25.254608] __x64_sys_mprotect+0x78/0xc0 [ 25.255125] do_syscall_64+0x3f/0x90 [ 25.255593] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.256237] [ 25.256452] Freed by task 213: [ 25.256840] kasan_save_stack+0x22/0x50 [ 25.257367] kasan_set_track+0x25/0x30 [ 25.257878] kasan_save_free_info+0x2b/0x50 [ 25.258438] __kasan_slab_free+0x10a/0x190 [ 25.258990] kmem_cache_free+0x10d/0x4d0 [ 25.259513] rcu_core+0x8c8/0x2860 [ 25.259992] __do_softirq+0x1b7/0x7d4 [ 25.260500] [ 25.260722] Last potentially related work creation: [ 25.261328] kasan_save_stack+0x22/0x50 [ 25.261855] __kasan_record_aux_stack+0x8e/0xa0 [ 25.262447] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.263114] remove_vma+0x139/0x170 [ 25.263583] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.264166] do_vmi_munmap+0x1f1/0x2b0 [ 25.264665] __vm_munmap+0x138/0x3a0 [ 25.265146] __x64_sys_munmap+0x59/0x80 [ 25.265653] do_syscall_64+0x3f/0x90 [ 25.266143] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.266806] [ 25.267032] Second to last potentially related work creation: [ 25.267749] kasan_save_stack+0x22/0x50 [ 25.268277] __kasan_record_aux_stack+0x8e/0xa0 [ 25.268884] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.269552] remove_vma+0x139/0x170 [ 25.270003] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.270557] do_vmi_munmap+0x1f1/0x2b0 [ 25.271036] mmap_region+0x1f9/0x2660 [ 25.271513] do_mmap+0x854/0xf00 [ 25.271952] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.272437] ksys_mmap_pgoff+0x3af/0x500 [ 25.272946] do_syscall_64+0x3f/0x90 [ 25.273425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.274060] [ 25.274280] The buggy address belongs to the object at ffff88800eda80e8 [ 25.274280] which belongs to the cache vm_area_struct of size 168 [ 25.275753] The buggy address is located 88 bytes inside of [ 25.275753] freed 168-byte region [ffff88800eda80e8, ffff88800eda8190) [ 25.277165] [ 25.277379] The buggy address belongs to the physical page: [ 25.278039] page:00000000b0347b1c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeda8 [ 25.279112] memcg:ffff88800ec8d001 [ 25.279534] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.280191] page_type: 0xffffffff() [ 25.280639] raw: 0100000000000200 ffff88800879fc80 ffffea0000376d40 000000000000000a [ 25.281545] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec8d001 [ 25.282449] page dumped because: kasan: bad access detected [ 25.283102] [ 25.283314] Memory state around the buggy address: [ 25.283898] ffff88800eda8000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.284743] ffff88800eda8080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 25.285592] >ffff88800eda8100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.286436] ^ [ 25.287062] ffff88800eda8180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 25.287917] ffff88800eda8200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.288750] ================================================================== [ 25.289711] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.193251] BUG: Bad rss-counter state mm:00000000508c5676 type:MM_FILEPAGES val:33 [ 27.194430] BUG: Bad rss-counter state mm:00000000508c5676 type:MM_ANONPAGES val:22 [ 27.563988] BUG: Bad rss-counter state mm:000000008e588caf type:MM_FILEPAGES val:33 [ 27.565019] BUG: Bad rss-counter state mm:000000008e588caf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2417' (ECDSA) to the list of known hosts. 2023/06/20 05:47:33 fuzzer started 2023/06/20 05:47:33 dialing manager at localhost:44161 2023/06/20 05:47:33 checking machine... 2023/06/20 05:47:33 checking revisions... [ 28.377303] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:47:34 testing simple program... [ 28.423792] cgroup: Unknown subsys name 'net' [ 28.482077] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:47:32 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=00007f22b7cde018 CR3=000000000e3d8000 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=2033333a37343a3530203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033333a37343a3530203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000008ab54 RBX=0000000000000001 RCX=ffffffff83642d11 RDX=000000000008ab65 RSI=000000000002642d RDI=00000000001a01fc RBP=ffff88806cf09aa8 RSP=ffff88806cf099e0 R8 =0000000000000000 R9 =ffff88806cf09a90 R10=0000000000038001 R11=000000000008ab54 R12=ffff88806cf09ab0 R13=ffff88806cf09a98 R14=ffff88806cf09a91 R15=ffff88806cf09a50 RIP=ffffffff8113083b 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 00007f1f9afb2900 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=00007fffca1ba000 CR3=000000001038a000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000