[ 36.714887] BUG: Bad rss-counter state mm:000000005d4ab4f3 type:MM_FILEPAGES val:33 [ 36.716524] BUG: Bad rss-counter state mm:000000005d4ab4f3 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.877195] ================================================================== [ 36.878512] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.879730] Read of size 8 at addr ffff88800e21d6b0 by task sshd/219 [ 36.880738] [ 36.881020] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.882157] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.883444] Call Trace: [ 36.883864] [ 36.884232] dump_stack_lvl+0x91/0xf0 [ 36.884876] print_report+0xcc/0x620 [ 36.885514] ? __virt_addr_valid+0x102/0x340 [ 36.886242] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.887054] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.887879] kasan_report+0xbe/0xf0 [ 36.888520] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.889353] vma_interval_tree_remove+0xc75/0xec0 [ 36.890182] vma_prepare+0xc54/0x11a0 [ 36.890828] __split_vma+0x5af/0x950 [ 36.891462] ? __pfx___split_vma+0x10/0x10 [ 36.892172] ? find_held_lock+0x2c/0x110 [ 36.892865] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.893612] ? lock_is_held_type+0x9f/0x120 [ 36.894360] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.895184] ? mtree_range_walk+0x632/0x900 [ 36.895915] ? mas_walk+0x5c7/0x7c0 [ 36.896553] do_vmi_munmap+0x1f1/0x2b0 [ 36.897207] mmap_region+0x1f9/0x2660 [ 36.897873] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.898557] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.899514] ? __pfx_lock_acquire+0x10/0x10 [ 36.900228] ? __pfx_mmap_region+0x10/0x10 [ 36.900935] ? security_mmap_addr+0x7d/0xa0 [ 36.901643] ? get_unmapped_area+0x1f5/0x3f0 [ 36.902423] do_mmap+0x854/0xf00 [ 36.902976] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.903595] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.904294] ksys_mmap_pgoff+0x3af/0x500 [ 36.904922] do_syscall_64+0x3f/0x90 [ 36.905510] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.906341] RIP: 0033:0x7f7902d06d82 [ 36.906849] 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 [ 36.908959] RSP: 002b:00007fff350be218 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.909865] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7902d06d82 [ 36.910710] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7902140000 [ 36.911554] RBP: 00007f7902140000 R08: 0000000000000009 R09: 0000000000001000 [ 36.912393] R10: 0000000000000812 R11: 0000000000000206 R12: 000055597e923ec0 [ 36.913237] R13: 00007fff350be230 R14: 00007fff350be260 R15: 00007fff350be5c0 [ 36.914127] [ 36.914420] [ 36.914636] Allocated by task 212: [ 36.915062] kasan_save_stack+0x22/0x50 [ 36.915566] kasan_set_track+0x25/0x30 [ 36.916058] __kasan_slab_alloc+0x59/0x70 [ 36.916584] kmem_cache_alloc+0x16b/0x370 [ 36.917100] vm_area_dup+0x20/0x160 [ 36.917559] __split_vma+0x170/0x950 [ 36.918029] split_vma+0xc6/0x110 [ 36.918471] mprotect_fixup+0x8d2/0xb30 [ 36.918970] do_mprotect_pkey+0x87e/0xd40 [ 36.919496] __x64_sys_mprotect+0x78/0xc0 [ 36.920016] do_syscall_64+0x3f/0x90 [ 36.920488] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.921127] [ 36.921344] Freed by task 212: [ 36.921731] kasan_save_stack+0x22/0x50 [ 36.922241] kasan_set_track+0x25/0x30 [ 36.922732] kasan_save_free_info+0x2b/0x50 [ 36.923264] __kasan_slab_free+0x10a/0x190 [ 36.923804] kmem_cache_free+0x10d/0x4d0 [ 36.924312] rcu_core+0x8c8/0x2860 [ 36.924756] __do_softirq+0x1b7/0x7d4 [ 36.925233] [ 36.925452] Last potentially related work creation: [ 36.926055] kasan_save_stack+0x22/0x50 [ 36.926560] __kasan_record_aux_stack+0x8e/0xa0 [ 36.927129] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.927770] remove_vma+0x139/0x170 [ 36.928226] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.928781] do_vmi_munmap+0x1f1/0x2b0 [ 36.929274] __vm_munmap+0x138/0x3a0 [ 36.929744] __x64_sys_munmap+0x59/0x80 [ 36.930255] do_syscall_64+0x3f/0x90 [ 36.930742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.931391] [ 36.931607] Second to last potentially related work creation: [ 36.932298] kasan_save_stack+0x22/0x50 [ 36.932818] __kasan_record_aux_stack+0x8e/0xa0 [ 36.933397] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.934067] remove_vma+0x139/0x170 [ 36.934527] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.935079] do_vmi_munmap+0x1f1/0x2b0 [ 36.935566] mmap_region+0x1f9/0x2660 [ 36.936040] do_mmap+0x854/0xf00 [ 36.936470] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.936959] ksys_mmap_pgoff+0x3af/0x500 [ 36.937461] do_syscall_64+0x3f/0x90 [ 36.937948] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.938599] [ 36.938813] The buggy address belongs to the object at ffff88800e21d658 [ 36.938813] which belongs to the cache vm_area_struct of size 168 [ 36.940278] The buggy address is located 88 bytes inside of [ 36.940278] freed 168-byte region [ffff88800e21d658, ffff88800e21d700) [ 36.941664] [ 36.941893] The buggy address belongs to the physical page: [ 36.942550] page:000000009ad04691 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe21d [ 36.943634] memcg:ffff88800e0c1801 [ 36.944055] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 36.944765] page_type: 0xffffffff() [ 36.945213] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 36.946148] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0c1801 [ 36.947053] page dumped because: kasan: bad access detected [ 36.947708] [ 36.947925] Memory state around the buggy address: [ 36.948505] ffff88800e21d580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.949356] ffff88800e21d600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.950216] >ffff88800e21d680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.951063] ^ [ 36.951643] ffff88800e21d700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 36.952490] ffff88800e21d780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 36.953331] ================================================================== [ 36.954440] Disabling lock debugging due to kernel taint [ 38.998268] BUG: Bad rss-counter state mm:00000000fc1760a2 type:MM_FILEPAGES val:33 [ 38.999466] BUG: Bad rss-counter state mm:00000000fc1760a2 type:MM_ANONPAGES val:22 [ 39.393359] BUG: Bad rss-counter state mm:0000000093694748 type:MM_FILEPAGES val:33 [ 39.394592] BUG: Bad rss-counter state mm:0000000093694748 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20979' (ECDSA) to the list of known hosts. 2023/06/20 02:46:09 fuzzer started 2023/06/20 02:46:10 dialing manager at localhost:44161 2023/06/20 02:46:10 checking machine... 2023/06/20 02:46:10 checking revisions... [ 40.149265] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:46:10 testing simple program... [ 40.199034] cgroup: Unknown subsys name 'net' [ 40.260134] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:45:57 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000001000 RCX=ffffffff8185c8c3 RDX=0000000000001000 RSI=0000000000000000 RDI=0000000000000007 RBP=0000000000000000 RSP=ffff888015e67d40 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000001000 R11=0000000000000000 R12=0000000000000000 R13=ffff88800e8d8280 R14=ffff888015e67ec8 R15=0000000000000001 RIP=ffffffff814c01d0 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 00007fda6ea99900 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=00007ffd23fb2000 CR3=000000000edd4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=ffff888008c58400 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=00007f2fd943ebe0 CR3=000000000d804000 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=2039303a36343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a36343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000