[ 31.752983] BUG: Bad rss-counter state mm:0000000055a02be8 type:MM_FILEPAGES val:33 [ 31.754153] BUG: Bad rss-counter state mm:0000000055a02be8 type:MM_ANONPAGES val:22 [ 31.903166] ================================================================== [ 31.904078] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.905027] Read of size 8 at addr ffff88800e8b5880 by task sshd/219 [ 31.905792] [ 31.906099] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.906960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.907934] Call Trace: [ 31.908262] [ 31.908557] dump_stack_lvl+0x91/0xf0 [ 31.909047] print_report+0xcc/0x620 [ 31.909530] ? __virt_addr_valid+0x102/0x340 [ 31.910088] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.910708] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.911327] kasan_report+0xbe/0xf0 [ 31.911804] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.912457] vma_interval_tree_remove+0xc75/0xec0 [ 31.913057] vma_prepare+0xc54/0x11a0 [ 31.913536] __split_vma+0x5af/0x950 [ 31.914011] ? __pfx___split_vma+0x10/0x10 [ 31.914550] ? find_held_lock+0x2c/0x110 [ 31.915078] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.915644] ? lock_is_held_type+0x9f/0x120 [ 31.916188] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.916812] ? mtree_range_walk+0x632/0x900 [ 31.917366] ? mas_walk+0x5c7/0x7c0 [ 31.917846] do_vmi_munmap+0x1f1/0x2b0 [ 31.918334] mmap_region+0x1f9/0x2660 [ 31.918822] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.919330] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.920054] ? __pfx_lock_acquire+0x10/0x10 [ 31.920613] ? __pfx_mmap_region+0x10/0x10 [ 31.921137] ? security_mmap_addr+0x7d/0xa0 [ 31.921676] ? get_unmapped_area+0x1f5/0x3f0 [ 31.922219] do_mmap+0x854/0xf00 [ 31.922656] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.923156] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.923714] ksys_mmap_pgoff+0x3af/0x500 [ 31.924228] do_syscall_64+0x3f/0x90 [ 31.924719] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.925382] RIP: 0033:0x7f1eeb4a9d82 [ 31.925833] 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 [ 31.927973] RSP: 002b:00007ffe03d2bb68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.928896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1eeb4a9d82 [ 31.929753] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1eea8e3000 [ 31.930608] RBP: 00007f1eea8e3000 R08: 0000000000000009 R09: 0000000000001000 [ 31.931467] R10: 0000000000000812 R11: 0000000000000206 R12: 00005607b4656f70 [ 31.932320] R13: 00007ffe03d2bb80 R14: 00007ffe03d2bbb0 R15: 00007ffe03d2bf10 [ 31.933192] [ 31.933482] [ 31.933703] Allocated by task 212: [ 31.934136] kasan_save_stack+0x22/0x50 [ 31.934645] kasan_set_track+0x25/0x30 [ 31.935140] __kasan_slab_alloc+0x59/0x70 [ 31.935665] kmem_cache_alloc+0x16b/0x370 [ 31.936185] vm_area_dup+0x20/0x160 [ 31.936656] __split_vma+0x170/0x950 [ 31.937125] split_vma+0xc6/0x110 [ 31.937571] mprotect_fixup+0x8d2/0xb30 [ 31.938073] do_mprotect_pkey+0x87e/0xd40 [ 31.938593] __x64_sys_mprotect+0x78/0xc0 [ 31.939114] do_syscall_64+0x3f/0x90 [ 31.939588] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.940231] [ 31.940458] Freed by task 212: [ 31.940853] kasan_save_stack+0x22/0x50 [ 31.941362] kasan_set_track+0x25/0x30 [ 31.941864] kasan_save_free_info+0x2b/0x50 [ 31.942401] __kasan_slab_free+0x10a/0x190 [ 31.942933] kmem_cache_free+0x10d/0x4d0 [ 31.943448] rcu_core+0x8c8/0x2860 [ 31.943895] __do_softirq+0x1b7/0x7d4 [ 31.944391] [ 31.944614] Last potentially related work creation: [ 31.945198] kasan_save_stack+0x22/0x50 [ 31.945700] __kasan_record_aux_stack+0x8e/0xa0 [ 31.946279] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.946924] remove_vma+0x139/0x170 [ 31.947381] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.947935] do_vmi_munmap+0x1f1/0x2b0 [ 31.948454] __vm_munmap+0x138/0x3a0 [ 31.948926] __x64_sys_munmap+0x59/0x80 [ 31.949420] do_syscall_64+0x3f/0x90 [ 31.949899] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.950551] [ 31.950769] The buggy address belongs to the object at ffff88800e8b5828 [ 31.950769] which belongs to the cache vm_area_struct of size 168 [ 31.952248] The buggy address is located 88 bytes inside of [ 31.952248] freed 168-byte region [ffff88800e8b5828, ffff88800e8b58d0) [ 31.953669] [ 31.953890] The buggy address belongs to the physical page: [ 31.954560] page:0000000019c97b62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe8b5 [ 31.955663] memcg:ffff88800d12ac01 [ 31.956086] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.956812] page_type: 0xffffffff() [ 31.957261] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 31.958201] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d12ac01 [ 31.959112] page dumped because: kasan: bad access detected [ 31.959779] [ 31.959996] Memory state around the buggy address: [ 31.960586] ffff88800e8b5780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.961442] ffff88800e8b5800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.962292] >ffff88800e8b5880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.963156] ^ [ 31.963569] ffff88800e8b5900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.964429] ffff88800e8b5980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 31.965276] ================================================================== [ 31.966243] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.845141] BUG: Bad rss-counter state mm:000000002990e267 type:MM_FILEPAGES val:33 [ 33.846164] BUG: Bad rss-counter state mm:000000002990e267 type:MM_ANONPAGES val:22 [ 34.317708] BUG: Bad rss-counter state mm:00000000a3e1a79e type:MM_FILEPAGES val:33 [ 34.318691] BUG: Bad rss-counter state mm:00000000a3e1a79e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47174' (ECDSA) to the list of known hosts. 2023/06/19 15:53:52 fuzzer started 2023/06/19 15:53:52 dialing manager at localhost:44161 2023/06/19 15:53:52 checking machine... 2023/06/19 15:53:52 checking revisions... [ 35.033948] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:53:52 testing simple program... [ 35.073569] cgroup: Unknown subsys name 'net' [ 35.109092] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:53:51 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fc846e57ca0 CR3=000000001015a000 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=2032353a33353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031353a33353a3531203931 XMM08=00007f7550004b400000008300000100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000008 RBX=ffff8880147d7c20 RCX=0000000000000000 RDX=0000000000000003 RSI=ffffffff849c9b00 RDI=0000000000000000 RBP=ffffffff849c9b00 RSP=ffff8880147d7988 R8 =0000000000000004 R9 =0000000000000031 R10=0000000000000083 R11=00000000000b6996 R12=0000000000000000 R13=ffff8880102280e0 R14=1ffff110028faf3b R15=0000000000000083 RIP=ffffffff814c0402 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 00007f800faa1900 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=00007ffd7f4ab000 CR3=0000000016dec000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000