syzkaller login: [ 30.506470] sshd (213) used greatest stack depth: 24128 bytes left [ 30.508286] BUG: Bad rss-counter state mm:00000000a6852a26 type:MM_FILEPAGES val:33 [ 30.509396] BUG: Bad rss-counter state mm:00000000a6852a26 type:MM_ANONPAGES val:22 [ 30.660506] ================================================================== [ 30.661431] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.662342] Read of size 8 at addr ffff888019e13d08 by task sshd/220 [ 30.663088] [ 30.663304] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.664257] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.665210] Call Trace: [ 30.665523] [ 30.665801] dump_stack_lvl+0x91/0xf0 [ 30.666281] print_report+0xcc/0x620 [ 30.666764] ? __virt_addr_valid+0x102/0x340 [ 30.667295] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.667897] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.668504] kasan_report+0xbe/0xf0 [ 30.668993] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.669607] vma_interval_tree_remove+0xc75/0xec0 [ 30.670192] vma_prepare+0xc54/0x11a0 [ 30.670663] __split_vma+0x5af/0x950 [ 30.671120] ? __pfx___split_vma+0x10/0x10 [ 30.671637] ? find_held_lock+0x2c/0x110 [ 30.672147] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.672714] ? lock_is_held_type+0x9f/0x120 [ 30.673240] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.673829] ? mtree_range_walk+0x632/0x900 [ 30.674367] ? mas_walk+0x5c7/0x7c0 [ 30.674830] do_vmi_munmap+0x1f1/0x2b0 [ 30.675318] mmap_region+0x1f9/0x2660 [ 30.675787] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.676287] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.676984] ? __pfx_lock_acquire+0x10/0x10 [ 30.677507] ? __pfx_mmap_region+0x10/0x10 [ 30.678033] ? security_mmap_addr+0x7d/0xa0 [ 30.678557] ? get_unmapped_area+0x1f5/0x3f0 [ 30.679091] do_mmap+0x854/0xf00 [ 30.679518] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.680000] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.680551] ksys_mmap_pgoff+0x3af/0x500 [ 30.681063] do_syscall_64+0x3f/0x90 [ 30.681531] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.682161] RIP: 0033:0x7fe897b1ed82 [ 30.682609] 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 [ 30.684703] RSP: 002b:00007ffd5cf9a488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.685586] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe897b1ed82 [ 30.686407] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe896f58000 [ 30.687250] RBP: 00007fe896f58000 R08: 0000000000000009 R09: 0000000000001000 [ 30.688088] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560fc31f5d90 [ 30.688934] R13: 00007ffd5cf9a4a0 R14: 00007ffd5cf9a4d0 R15: 00007ffd5cf9a830 [ 30.689788] [ 30.690073] [ 30.690283] Allocated by task 213: [ 30.690703] kasan_save_stack+0x22/0x50 [ 30.691201] kasan_set_track+0x25/0x30 [ 30.691689] __kasan_slab_alloc+0x59/0x70 [ 30.692207] kmem_cache_alloc+0x16b/0x370 [ 30.692717] vm_area_dup+0x20/0x160 [ 30.693159] __split_vma+0x170/0x950 [ 30.693620] split_vma+0xc6/0x110 [ 30.694051] mprotect_fixup+0x8d2/0xb30 [ 30.694541] do_mprotect_pkey+0x87e/0xd40 [ 30.695051] __x64_sys_mprotect+0x78/0xc0 [ 30.695562] do_syscall_64+0x3f/0x90 [ 30.696025] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696695] [ 30.696912] Freed by task 213: [ 30.697328] kasan_save_stack+0x22/0x50 [ 30.697843] kasan_set_track+0x25/0x30 [ 30.698340] kasan_save_free_info+0x2b/0x50 [ 30.698868] __kasan_slab_free+0x10a/0x190 [ 30.699390] kmem_cache_free+0x10d/0x4d0 [ 30.699886] rcu_core+0x8c8/0x2860 [ 30.700320] __do_softirq+0x1b7/0x7d4 [ 30.700792] [ 30.701001] Last potentially related work creation: [ 30.701574] kasan_save_stack+0x22/0x50 [ 30.702066] __kasan_record_aux_stack+0x8e/0xa0 [ 30.702623] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.703249] remove_vma+0x139/0x170 [ 30.703683] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.704228] do_vmi_munmap+0x1f1/0x2b0 [ 30.704708] __vm_munmap+0x138/0x3a0 [ 30.705207] __x64_sys_munmap+0x59/0x80 [ 30.705691] do_syscall_64+0x3f/0x90 [ 30.706153] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.706782] [ 30.706995] The buggy address belongs to the object at ffff888019e13cb0 [ 30.706995] which belongs to the cache vm_area_struct of size 168 [ 30.708423] The buggy address is located 88 bytes inside of [ 30.708423] freed 168-byte region [ffff888019e13cb0, ffff888019e13d58) [ 30.709845] [ 30.710062] The buggy address belongs to the physical page: [ 30.710720] page:00000000f9c9a4e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e13 [ 30.711799] memcg:ffff88800db66101 [ 30.712216] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.712848] page_type: 0xffffffff() [ 30.713288] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.714208] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800db66101 [ 30.715109] page dumped because: kasan: bad access detected [ 30.715789] [ 30.716002] Memory state around the buggy address: [ 30.716581] ffff888019e13c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 30.717433] ffff888019e13c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.718300] >ffff888019e13d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.719142] ^ [ 30.719593] ffff888019e13d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.720437] ffff888019e13e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.721284] ================================================================== [ 30.722301] Disabling lock debugging due to kernel taint [ 32.706455] BUG: Bad rss-counter state mm:00000000dd578619 type:MM_FILEPAGES val:33 [ 32.707641] BUG: Bad rss-counter state mm:00000000dd578619 type:MM_ANONPAGES val:22 [ 33.159149] BUG: Bad rss-counter state mm:000000007580ca1c type:MM_FILEPAGES val:33 [ 33.160269] BUG: Bad rss-counter state mm:000000007580ca1c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54795' (ECDSA) to the list of known hosts. 2023/06/20 11:56:09 fuzzer started 2023/06/20 11:56:09 dialing manager at localhost:36067 2023/06/20 11:56:09 checking machine... 2023/06/20 11:56:09 checking revisions... [ 33.814797] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:56:10 testing simple program... [ 33.857246] cgroup: Unknown subsys name 'net' [ 33.902476] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:56:09 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=ffff88801661d1c0 RSI=ffffffff811fc450 RDI=ffff88801661db40 RBP=0000000000000000 RSP=ffff88800f08fe50 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff88801661da38 R13=ffff88801661d1c0 R14=0000000000000001 R15=0000000000000000 RIP=ffffffff814c0880 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 00007fab9b985900 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=00007ffff83b6000 CR3=000000000c660000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 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=00007f5b6914a6c0 CR3=0000000009938000 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=e575270b02e5b895eb40361a422f0d0b XMM02=000000000011ab00ec2efd57dc4c00df XMM03=0000000000121fa05b628f80ef0ea3f8 XMM04=91c6c228c4792c6800000000000ae988 XMM05=19e9129bd510f2350000000000132018 XMM06=4fda316b135da52b0000000000131ea0 XMM07=e042d86d42eb936e0000000000122220 XMM08=5b628f80ef0ea3f8000000000011ab60 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000