[ 34.391473] BUG: Bad rss-counter state mm:0000000063ea59e7 type:MM_FILEPAGES val:33 [ 34.392461] BUG: Bad rss-counter state mm:0000000063ea59e7 type:MM_ANONPAGES val:22 [ 34.546965] ================================================================== [ 34.547867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.548801] Read of size 8 at addr ffff888009770d08 by task sshd/219 [ 34.549584] [ 34.549912] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.550787] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.551754] Call Trace: [ 34.552100] [ 34.552396] dump_stack_lvl+0x91/0xf0 [ 34.552892] print_report+0xcc/0x620 [ 34.553373] ? __virt_addr_valid+0x102/0x340 [ 34.553955] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.554573] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.555253] kasan_report+0xbe/0xf0 [ 34.555749] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.556364] vma_interval_tree_remove+0xc75/0xec0 [ 34.556982] vma_prepare+0xc54/0x11a0 [ 34.557474] __split_vma+0x5af/0x950 [ 34.557961] ? __pfx___split_vma+0x10/0x10 [ 34.558485] ? find_held_lock+0x2c/0x110 [ 34.559017] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.559581] ? lock_is_held_type+0x9f/0x120 [ 34.560115] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.560716] ? mtree_range_walk+0x632/0x900 [ 34.561262] ? mas_walk+0x5c7/0x7c0 [ 34.561737] do_vmi_munmap+0x1f1/0x2b0 [ 34.562223] mmap_region+0x1f9/0x2660 [ 34.562707] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.563222] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.563930] ? __pfx_lock_acquire+0x10/0x10 [ 34.564460] ? __pfx_mmap_region+0x10/0x10 [ 34.564987] ? security_mmap_addr+0x7d/0xa0 [ 34.565515] ? get_unmapped_area+0x1f5/0x3f0 [ 34.566091] do_mmap+0x854/0xf00 [ 34.566527] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.567023] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.567581] ksys_mmap_pgoff+0x3af/0x500 [ 34.568087] do_syscall_64+0x3f/0x90 [ 34.568560] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.569196] RIP: 0033:0x7effeb7dcd82 [ 34.569664] 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 [ 34.571761] RSP: 002b:00007ffdc1dfe338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.572655] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007effeb7dcd82 [ 34.573499] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007effeac16000 [ 34.574343] RBP: 00007effeac16000 R08: 0000000000000009 R09: 0000000000001000 [ 34.575174] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562871793d90 [ 34.576009] R13: 00007ffdc1dfe350 R14: 00007ffdc1dfe380 R15: 00007ffdc1dfe6e0 [ 34.576857] [ 34.577161] [ 34.577376] Allocated by task 212: [ 34.577817] kasan_save_stack+0x22/0x50 [ 34.578319] kasan_set_track+0x25/0x30 [ 34.578810] __kasan_slab_alloc+0x59/0x70 [ 34.579329] kmem_cache_alloc+0x16b/0x370 [ 34.579837] vm_area_dup+0x20/0x160 [ 34.580297] __split_vma+0x170/0x950 [ 34.580759] split_vma+0xc6/0x110 [ 34.581193] mprotect_fixup+0x8d2/0xb30 [ 34.581706] do_mprotect_pkey+0x87e/0xd40 [ 34.582224] __x64_sys_mprotect+0x78/0xc0 [ 34.582736] do_syscall_64+0x3f/0x90 [ 34.583203] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.583835] [ 34.584047] Freed by task 212: [ 34.584436] kasan_save_stack+0x22/0x50 [ 34.584942] kasan_set_track+0x25/0x30 [ 34.585438] kasan_save_free_info+0x2b/0x50 [ 34.585999] __kasan_slab_free+0x10a/0x190 [ 34.586531] kmem_cache_free+0x10d/0x4d0 [ 34.587033] rcu_core+0x8c8/0x2860 [ 34.587474] __do_softirq+0x1b7/0x7d4 [ 34.587952] [ 34.588167] Last potentially related work creation: [ 34.588746] kasan_save_stack+0x22/0x50 [ 34.589242] __kasan_record_aux_stack+0x8e/0xa0 [ 34.589829] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.590475] remove_vma+0x139/0x170 [ 34.590974] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.591541] do_vmi_munmap+0x1f1/0x2b0 [ 34.592029] __vm_munmap+0x138/0x3a0 [ 34.592493] __x64_sys_munmap+0x59/0x80 [ 34.592983] do_syscall_64+0x3f/0x90 [ 34.593459] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.594128] [ 34.594345] The buggy address belongs to the object at ffff888009770cb0 [ 34.594345] which belongs to the cache vm_area_struct of size 168 [ 34.595818] The buggy address is located 88 bytes inside of [ 34.595818] freed 168-byte region [ffff888009770cb0, ffff888009770d58) [ 34.597238] [ 34.597451] The buggy address belongs to the physical page: [ 34.598111] page:00000000cbecce5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9770 [ 34.599185] memcg:ffff88800e355301 [ 34.599606] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.600247] page_type: 0xffffffff() [ 34.600694] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 34.601606] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e355301 [ 34.602497] page dumped because: kasan: bad access detected [ 34.603155] [ 34.603369] Memory state around the buggy address: [ 34.603950] ffff888009770c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.604799] ffff888009770c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.605659] >ffff888009770d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.606497] ^ [ 34.606932] ffff888009770d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.607770] ffff888009770e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.608608] ================================================================== [ 34.609568] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.472531] BUG: Bad rss-counter state mm:00000000dd88800d type:MM_FILEPAGES val:33 [ 36.473689] BUG: Bad rss-counter state mm:00000000dd88800d type:MM_ANONPAGES val:22 [ 37.000812] BUG: Bad rss-counter state mm:0000000013559598 type:MM_FILEPAGES val:33 [ 37.002170] BUG: Bad rss-counter state mm:0000000013559598 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:30485' (ECDSA) to the list of known hosts. 2023/06/19 17:39:54 fuzzer started 2023/06/19 17:39:55 dialing manager at localhost:44161 2023/06/19 17:39:55 checking machine... 2023/06/19 17:39:55 checking revisions... [ 37.622848] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:39:55 testing simple program... [ 37.672834] cgroup: Unknown subsys name 'net' [ 37.712205] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:39:44 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff87b67200 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81827a83 RDI=ffffffff8560b640 RBP=ffff88806ce361a0 RSP=ffff888010047898 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=0000000000000000 R12=0000000000000200 R13=00000000000361a0 R14=000000000000003f R15=ffff88800c7a6000 RIP=ffffffff812d8614 RFL=00000093 [--S-A-C] 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 00007fc709fc5900 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=00007fc70a57d0b0 CR3=00000000167ce000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffee70c3a08 CR3=0000000015ea2000 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=39333a3731203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383835 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000