syzkaller login: [ 30.743545] BUG: Bad rss-counter state mm:00000000a7d5bf34 type:MM_FILEPAGES val:33 [ 30.744611] BUG: Bad rss-counter state mm:00000000a7d5bf34 type:MM_ANONPAGES val:22 [ 30.858983] ================================================================== [ 30.859738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.860471] Read of size 8 at addr ffff88801a0e0c20 by task sshd/221 [ 30.861056] [ 30.861226] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.862008] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.862750] Call Trace: [ 30.862993] [ 30.863217] dump_stack_lvl+0x91/0xf0 [ 30.863598] print_report+0xcc/0x620 [ 30.863977] ? __virt_addr_valid+0x102/0x340 [ 30.864402] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.864875] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.865347] kasan_report+0xbe/0xf0 [ 30.865713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.866194] vma_interval_tree_remove+0xc75/0xec0 [ 30.866648] vma_prepare+0xc54/0x11a0 [ 30.867016] __split_vma+0x5af/0x950 [ 30.867373] ? __pfx___split_vma+0x10/0x10 [ 30.867778] ? find_held_lock+0x2c/0x110 [ 30.868183] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.868618] ? lock_is_held_type+0x9f/0x120 [ 30.869027] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.869489] ? mtree_range_walk+0x632/0x900 [ 30.869925] ? mas_walk+0x5c7/0x7c0 [ 30.870286] do_vmi_munmap+0x1f1/0x2b0 [ 30.870657] mmap_region+0x1f9/0x2660 [ 30.870942] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.871240] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.871659] ? __pfx_lock_acquire+0x10/0x10 [ 30.871973] ? __pfx_mmap_region+0x10/0x10 [ 30.872281] ? security_mmap_addr+0x7d/0xa0 [ 30.872593] ? get_unmapped_area+0x1f5/0x3f0 [ 30.872912] do_mmap+0x854/0xf00 [ 30.873164] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.873452] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.873779] ksys_mmap_pgoff+0x3af/0x500 [ 30.874089] do_syscall_64+0x3f/0x90 [ 30.874370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.874756] RIP: 0033:0x7f7d9cbd8d82 [ 30.875024] 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 [ 30.876274] RSP: 002b:00007ffe31377fb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.876812] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d9cbd8d82 [ 30.877313] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d9c012000 [ 30.877811] RBP: 00007f7d9c012000 R08: 0000000000000009 R09: 0000000000001000 [ 30.878317] R10: 0000000000000812 R11: 0000000000000206 R12: 000055bc8166af70 [ 30.878817] R13: 00007ffe31377fd0 R14: 00007ffe31378000 R15: 00007ffe31378360 [ 30.879321] [ 30.879497] [ 30.879623] Allocated by task 214: [ 30.879874] kasan_save_stack+0x22/0x50 [ 30.880167] kasan_set_track+0x25/0x30 [ 30.880456] __kasan_slab_alloc+0x59/0x70 [ 30.880761] kmem_cache_alloc+0x16b/0x370 [ 30.881064] vm_area_dup+0x20/0x160 [ 30.881329] __split_vma+0x170/0x950 [ 30.881597] split_vma+0xc6/0x110 [ 30.881862] mprotect_fixup+0x8d2/0xb30 [ 30.882156] do_mprotect_pkey+0x87e/0xd40 [ 30.882460] __x64_sys_mprotect+0x78/0xc0 [ 30.882766] do_syscall_64+0x3f/0x90 [ 30.883041] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.883418] [ 30.883543] Freed by task 204: [ 30.883775] kasan_save_stack+0x22/0x50 [ 30.884066] kasan_set_track+0x25/0x30 [ 30.884356] kasan_save_free_info+0x2b/0x50 [ 30.884664] __kasan_slab_free+0x10a/0x190 [ 30.884977] kmem_cache_free+0x10d/0x4d0 [ 30.885271] rcu_core+0x8c8/0x2860 [ 30.885531] __do_softirq+0x1b7/0x7d4 [ 30.885808] [ 30.885938] Last potentially related work creation: [ 30.886282] kasan_save_stack+0x22/0x50 [ 30.886574] __kasan_record_aux_stack+0x8e/0xa0 [ 30.886908] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.887287] remove_vma+0x139/0x170 [ 30.887550] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.887872] do_vmi_munmap+0x1f1/0x2b0 [ 30.888150] __vm_munmap+0x138/0x3a0 [ 30.888421] __x64_sys_munmap+0x59/0x80 [ 30.888711] do_syscall_64+0x3f/0x90 [ 30.888992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.889369] [ 30.889494] Second to last potentially related work creation: [ 30.889903] kasan_save_stack+0x22/0x50 [ 30.890202] __kasan_record_aux_stack+0x8e/0xa0 [ 30.890536] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.890915] remove_vma+0x139/0x170 [ 30.891175] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.891495] do_vmi_munmap+0x1f1/0x2b0 [ 30.891781] mmap_region+0x1f9/0x2660 [ 30.892058] do_mmap+0x854/0xf00 [ 30.892308] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.892590] ksys_mmap_pgoff+0x3af/0x500 [ 30.892882] do_syscall_64+0x3f/0x90 [ 30.893159] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.893539] [ 30.893664] The buggy address belongs to the object at ffff88801a0e0bc8 [ 30.893664] which belongs to the cache vm_area_struct of size 168 [ 30.894490] The buggy address is located 88 bytes inside of [ 30.894490] freed 168-byte region [ffff88801a0e0bc8, ffff88801a0e0c70) [ 30.895282] [ 30.895403] The buggy address belongs to the physical page: [ 30.895771] page:0000000076f3b203 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a0e0 [ 30.896384] memcg:ffff8880163e4d01 [ 30.896622] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.896982] page_type: 0xffffffff() [ 30.897233] raw: 0100000000000200 ffff8880087a0c80 ffffea0000683a00 dead000000000006 [ 30.897742] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880163e4d01 [ 30.898253] page dumped because: kasan: bad access detected [ 30.898620] [ 30.898741] Memory state around the buggy address: [ 30.899061] ffff88801a0e0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.899543] ffff88801a0e0b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 30.900018] >ffff88801a0e0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.900488] ^ [ 30.900786] ffff88801a0e0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.901261] ffff88801a0e0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.901745] ================================================================== [ 30.902301] Disabling lock debugging due to kernel taint [ 32.987599] BUG: Bad rss-counter state mm:000000000b63b074 type:MM_FILEPAGES val:33 [ 32.988915] BUG: Bad rss-counter state mm:000000000b63b074 type:MM_ANONPAGES val:22 [ 33.505419] BUG: Bad rss-counter state mm:000000008928c683 type:MM_FILEPAGES val:33 [ 33.506690] BUG: Bad rss-counter state mm:000000008928c683 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21019' (ECDSA) to the list of known hosts. 2023/06/21 07:33:02 fuzzer started 2023/06/21 07:33:03 dialing manager at localhost:36067 2023/06/21 07:33:03 checking machine... 2023/06/21 07:33:03 checking revisions... [ 34.233734] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:33:03 testing simple program... [ 34.288707] cgroup: Unknown subsys name 'net' [ 34.335670] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:33:02 Registers: info registers vcpu 0 RAX=1ffff11001fb3f22 RBX=ffff88800fd9f960 RCX=ffff88800fd9f968 RDX=ffff88800fda0000 RSI=1ffff11001fb3f1b RDI=ffff88800fd9f8c8 RBP=dffffc0000000000 RSP=ffff88800fd9f870 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88800fd9f8c8 R11=00000000000b6a61 R12=ffffed1001fb3f1b R13=ffffed1001fb3f1a R14=ffff88800fd9f910 R15=ffff88800fd9f8c8 RIP=ffffffff811305d0 RFL=00000216 [----AP-] 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 00007f53888ca900 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=00007f5388e7f650 CR3=00000000102b0000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007f9d875226c0 CR3=000000000e6e6000 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=2032303a33333a3730203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a33333a3730203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000