syzkaller login: [ 29.938963] BUG: Bad rss-counter state mm:00000000cda22cac type:MM_FILEPAGES val:33 [ 29.939766] BUG: Bad rss-counter state mm:00000000cda22cac type:MM_ANONPAGES val:22 [ 30.069764] ================================================================== [ 30.070407] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.071096] Read of size 8 at addr ffff888017defa50 by task sshd/220 [ 30.071647] [ 30.071803] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.072383] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.073068] Call Trace: [ 30.073304] [ 30.073503] dump_stack_lvl+0x91/0xf0 [ 30.073844] print_report+0xcc/0x620 [ 30.074399] ? __virt_addr_valid+0x102/0x340 [ 30.074771] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.075189] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.075638] kasan_report+0xbe/0xf0 [ 30.075962] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.076400] vma_interval_tree_remove+0xc75/0xec0 [ 30.076814] vma_prepare+0xc54/0x11a0 [ 30.077141] __split_vma+0x5af/0x950 [ 30.077459] ? __pfx___split_vma+0x10/0x10 [ 30.077834] ? find_held_lock+0x2c/0x110 [ 30.078217] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.078619] ? lock_is_held_type+0x9f/0x120 [ 30.079008] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.079425] ? mtree_range_walk+0x632/0x900 [ 30.079802] ? mas_walk+0x5c7/0x7c0 [ 30.080128] do_vmi_munmap+0x1f1/0x2b0 [ 30.080452] mmap_region+0x1f9/0x2660 [ 30.080776] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.081137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.081629] ? __pfx_lock_acquire+0x10/0x10 [ 30.082018] ? __pfx_mmap_region+0x10/0x10 [ 30.082382] ? security_mmap_addr+0x7d/0xa0 [ 30.082753] ? get_unmapped_area+0x1f5/0x3f0 [ 30.083192] do_mmap+0x854/0xf00 [ 30.083498] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.083852] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.084239] ksys_mmap_pgoff+0x3af/0x500 [ 30.084594] do_syscall_64+0x3f/0x90 [ 30.084930] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.085391] RIP: 0033:0x7fd5ebb83d82 [ 30.085723] 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 [ 30.087197] RSP: 002b:00007ffd8eda1c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.087786] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd5ebb83d82 [ 30.088369] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd5eafbd000 [ 30.088949] RBP: 00007fd5eafbd000 R08: 0000000000000009 R09: 0000000000001000 [ 30.089530] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a17d4fdec0 [ 30.090114] R13: 00007ffd8eda1c20 R14: 00007ffd8eda1c50 R15: 00007ffd8eda1fb0 [ 30.090705] [ 30.090905] [ 30.091096] Allocated by task 213: [ 30.091391] kasan_save_stack+0x22/0x50 [ 30.091755] kasan_set_track+0x25/0x30 [ 30.092093] __kasan_slab_alloc+0x59/0x70 [ 30.092462] kmem_cache_alloc+0x16b/0x370 [ 30.092817] vm_area_dup+0x20/0x160 [ 30.093131] __split_vma+0x170/0x950 [ 30.093459] split_vma+0xc6/0x110 [ 30.093757] mprotect_fixup+0x8d2/0xb30 [ 30.094094] do_mprotect_pkey+0x87e/0xd40 [ 30.094446] __x64_sys_mprotect+0x78/0xc0 [ 30.094820] do_syscall_64+0x3f/0x90 [ 30.095188] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.095648] [ 30.095806] Freed by task 202: [ 30.096078] kasan_save_stack+0x22/0x50 [ 30.096427] kasan_set_track+0x25/0x30 [ 30.096762] kasan_save_free_info+0x2b/0x50 [ 30.097125] __kasan_slab_free+0x10a/0x190 [ 30.097496] kmem_cache_free+0x10d/0x4d0 [ 30.097850] rcu_core+0x8c8/0x2860 [ 30.098157] __do_softirq+0x1b7/0x7d4 [ 30.098489] [ 30.098636] Last potentially related work creation: [ 30.099062] kasan_save_stack+0x22/0x50 [ 30.099422] __kasan_record_aux_stack+0x8e/0xa0 [ 30.099832] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.100297] remove_vma+0x139/0x170 [ 30.100613] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.101007] do_vmi_munmap+0x1f1/0x2b0 [ 30.101362] __vm_munmap+0x138/0x3a0 [ 30.101686] __x64_sys_munmap+0x59/0x80 [ 30.102018] do_syscall_64+0x3f/0x90 [ 30.102332] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.102765] [ 30.102913] The buggy address belongs to the object at ffff888017def9f8 [ 30.102913] which belongs to the cache vm_area_struct of size 168 [ 30.103970] The buggy address is located 88 bytes inside of [ 30.103970] freed 168-byte region [ffff888017def9f8, ffff888017defaa0) [ 30.104940] [ 30.105088] The buggy address belongs to the physical page: [ 30.105539] page:00000000e67a0265 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17def [ 30.106288] memcg:ffff888016ae2601 [ 30.106570] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.107034] page_type: 0xffffffff() [ 30.107330] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.107935] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ae2601 [ 30.108538] page dumped because: kasan: bad access detected [ 30.108979] [ 30.109123] Memory state around the buggy address: [ 30.109506] ffff888017def900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.110063] ffff888017def980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.110626] >ffff888017defa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.111248] ^ [ 30.111724] ffff888017defa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 30.112305] ffff888017defb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.112900] ================================================================== [ 30.113611] Disabling lock debugging due to kernel taint [ 32.232241] BUG: Bad rss-counter state mm:0000000001d3cbc3 type:MM_FILEPAGES val:33 [ 32.232931] BUG: Bad rss-counter state mm:0000000001d3cbc3 type:MM_ANONPAGES val:22 [ 32.609466] BUG: Bad rss-counter state mm:00000000f81d227d type:MM_FILEPAGES val:33 [ 32.610512] BUG: Bad rss-counter state mm:00000000f81d227d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59252' (ECDSA) to the list of known hosts. 2023/06/21 09:03:00 fuzzer started 2023/06/21 09:03:00 dialing manager at localhost:36067 2023/06/21 09:03:00 checking machine... 2023/06/21 09:03:00 checking revisions... [ 33.211666] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:03:00 testing simple program... [ 33.245856] cgroup: Unknown subsys name 'net' [ 33.281930] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:02:59 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007fb924c72810 CR3=000000000f30c000 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=72c1fb3731d2cb89094c0aeb36cafe44 XMM02=000000000011a2c0ec2efd57dc4c00df XMM03=000000000012183872477d01fd0461d7 XMM04=a504eaac646134c700000000000ae988 XMM05=19e9129bd510f23500000000001316b0 XMM06=0c6573c3e90e68f90000000000130518 XMM07=e042d86d42eb936e0000000000121ab8 XMM08=72477d01fd0461d7000000000011a320 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0bb7b00 RBX=ffffffff85dbd804 RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806cf099e0 R8 =ffffffff860d8256 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd814 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000217 [----APC] 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 00007f34e885d900 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=00007f34e8822008 CR3=000000001ca38000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000