[ 53.699091] BUG: Bad rss-counter state mm:000000009d72f08d type:MM_FILEPAGES val:33 [ 53.700650] BUG: Bad rss-counter state mm:000000009d72f08d type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 53.867567] ================================================================== [ 53.868487] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 53.869427] Read of size 8 at addr ffff8880191e2968 by task sshd/220 [ 53.870203] [ 53.870423] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 53.871395] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 53.872387] Call Trace: [ 53.872712] [ 53.873016] dump_stack_lvl+0x91/0xf0 [ 53.873508] print_report+0xcc/0x620 [ 53.873998] ? __virt_addr_valid+0x102/0x340 [ 53.874568] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.875202] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.875831] kasan_report+0xbe/0xf0 [ 53.876308] ? vma_interval_tree_remove+0xc75/0xec0 [ 53.876932] vma_interval_tree_remove+0xc75/0xec0 [ 53.877552] vma_prepare+0xc54/0x11a0 [ 53.878040] __split_vma+0x5af/0x950 [ 53.878517] ? __pfx___split_vma+0x10/0x10 [ 53.879046] ? find_held_lock+0x2c/0x110 [ 53.879720] do_vmi_align_munmap+0x2ba/0x11f0 [ 53.880304] ? lock_is_held_type+0x9f/0x120 [ 53.880842] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 53.881444] ? mtree_range_walk+0x632/0x900 [ 53.881995] ? mas_walk+0x5c7/0x7c0 [ 53.882462] do_vmi_munmap+0x1f1/0x2b0 [ 53.882955] mmap_region+0x1f9/0x2660 [ 53.883471] ? vm_mmap_pgoff+0x15c/0x3a0 [ 53.883980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 53.884702] ? __pfx_lock_acquire+0x10/0x10 [ 53.885234] ? __pfx_mmap_region+0x10/0x10 [ 53.885764] ? security_mmap_addr+0x7d/0xa0 [ 53.886288] ? get_unmapped_area+0x1f5/0x3f0 [ 53.886840] do_mmap+0x854/0xf00 [ 53.887288] vm_mmap_pgoff+0x1a6/0x3a0 [ 53.887784] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 53.888341] ksys_mmap_pgoff+0x3af/0x500 [ 53.888846] do_syscall_64+0x3f/0x90 [ 53.889320] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.889966] RIP: 0033:0x7f0a9541ed82 [ 53.890426] 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 [ 53.892542] RSP: 002b:00007ffed51b4af8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 53.893448] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0a9541ed82 [ 53.894306] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0a94858000 [ 53.895180] RBP: 00007f0a94858000 R08: 0000000000000009 R09: 0000000000001000 [ 53.896038] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a2d6a9d90 [ 53.896895] R13: 00007ffed51b4b10 R14: 00007ffed51b4b40 R15: 00007ffed51b4ea0 [ 53.897754] [ 53.898048] [ 53.898260] Allocated by task 213: [ 53.898684] kasan_save_stack+0x22/0x50 [ 53.899201] kasan_set_track+0x25/0x30 [ 53.899699] __kasan_slab_alloc+0x59/0x70 [ 53.900225] kmem_cache_alloc+0x16b/0x370 [ 53.900738] vm_area_dup+0x20/0x160 [ 53.901183] __split_vma+0x170/0x950 [ 53.901646] split_vma+0xc6/0x110 [ 53.902085] mprotect_fixup+0x8d2/0xb30 [ 53.902592] do_mprotect_pkey+0x87e/0xd40 [ 53.903117] __x64_sys_mprotect+0x78/0xc0 [ 53.903659] do_syscall_64+0x3f/0x90 [ 53.904134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.904777] [ 53.904996] Freed by task 204: [ 53.905391] kasan_save_stack+0x22/0x50 [ 53.905895] kasan_set_track+0x25/0x30 [ 53.906386] kasan_save_free_info+0x2b/0x50 [ 53.906918] __kasan_slab_free+0x10a/0x190 [ 53.907467] kmem_cache_free+0x10d/0x4d0 [ 53.907977] rcu_core+0x8c8/0x2860 [ 53.908432] __do_softirq+0x1b7/0x7d4 [ 53.908911] [ 53.909124] Last potentially related work creation: [ 53.909713] kasan_save_stack+0x22/0x50 [ 53.910218] __kasan_record_aux_stack+0x8e/0xa0 [ 53.910791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 53.911436] remove_vma+0x139/0x170 [ 53.911889] do_vmi_align_munmap+0xd4a/0x11f0 [ 53.912450] do_vmi_munmap+0x1f1/0x2b0 [ 53.912934] __vm_munmap+0x138/0x3a0 [ 53.913406] __x64_sys_munmap+0x59/0x80 [ 53.913903] do_syscall_64+0x3f/0x90 [ 53.914374] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 53.915021] [ 53.915253] The buggy address belongs to the object at ffff8880191e2910 [ 53.915253] which belongs to the cache vm_area_struct of size 168 [ 53.916722] The buggy address is located 88 bytes inside of [ 53.916722] freed 168-byte region [ffff8880191e2910, ffff8880191e29b8) [ 53.918116] [ 53.918333] The buggy address belongs to the physical page: [ 53.918994] page:00000000cbc03a37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x191e2 [ 53.920093] memcg:ffff88800f04a301 [ 53.920514] flags: 0x100000000000200(slab|node=0|zone=1) [ 53.921161] page_type: 0xffffffff() [ 53.921613] raw: 0100000000000200 ffff88800879fc80 ffffea0000370ec0 dead000000000004 [ 53.922527] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f04a301 [ 53.923436] page dumped because: kasan: bad access detected [ 53.924096] [ 53.924315] Memory state around the buggy address: [ 53.924888] ffff8880191e2800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 53.925739] ffff8880191e2880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 53.926583] >ffff8880191e2900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 53.927433] ^ [ 53.928206] ffff8880191e2980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 53.929061] ffff8880191e2a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 53.929912] ================================================================== [ 53.930959] Disabling lock debugging due to kernel taint [ 55.882095] BUG: Bad rss-counter state mm:000000003e4ed70a type:MM_FILEPAGES val:33 [ 55.883274] BUG: Bad rss-counter state mm:000000003e4ed70a type:MM_ANONPAGES val:22 [ 56.348617] BUG: Bad rss-counter state mm:00000000b002826c type:MM_FILEPAGES val:33 [ 56.349609] BUG: Bad rss-counter state mm:00000000b002826c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47540' (ECDSA) to the list of known hosts. 2023/06/19 12:33:35 fuzzer started 2023/06/19 12:33:35 dialing manager at localhost:44161 2023/06/19 12:33:35 checking machine... 2023/06/19 12:33:35 checking revisions... [ 57.090813] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:33:35 testing simple program... [ 57.142358] cgroup: Unknown subsys name 'net' [ 57.179479] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:33:12 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000005 RDX=0000000000000000 RSI=00007efc2ee08c20 RDI=0000000000000005 RBP=00007fffbd7dd840 RSP=00007fffbd7dd2e8 R8 =00007fffbd7dd807 R9 =cccccccccccccccd R10=0000000000000000 R11=0000000000000000 R12=00007fffbd7dd850 R13=00007efc2f3b6a84 R14=00007fffbd7dd990 R15=0000000000000064 RIP=00007efc2eccbef8 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007efc2e887900 00000000 00000000 GS =0000 0000000000000000 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=00007efc2ee3f0b0 CR3=000000000975a000 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=25252525252525252525252525252525 XMM01=000000000000000000000000ff00ff00 XMM02=000000000000000000000000ff000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=5f6c697475646f6d6d61705f0064255f 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=00007ffd92e772d8 CR3=00000000165ea000 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=2034333a33333a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034333a33333a3231203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000