[ 37.272160] BUG: Bad rss-counter state mm:000000008ee84e6b type:MM_FILEPAGES val:33 [ 37.273376] BUG: Bad rss-counter state mm:000000008ee84e6b type:MM_ANONPAGES val:22 [ 37.418388] ================================================================== [ 37.419544] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 37.420684] Read of size 8 at addr ffff88800d6b25c8 by task sshd/218 [ 37.421801] [ 37.422069] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 37.423129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 37.424348] Call Trace: [ 37.424678] <TASK> [ 37.424968] dump_stack_lvl+0x91/0xf0 [ 37.425456] print_report+0xcc/0x620 [ 37.425932] ? __virt_addr_valid+0x102/0x340 [ 37.426477] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.427092] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.427727] kasan_report+0xbe/0xf0 [ 37.428203] ? vma_interval_tree_remove+0xc75/0xec0 [ 37.428822] vma_interval_tree_remove+0xc75/0xec0 [ 37.429435] vma_prepare+0xc54/0x11a0 [ 37.429914] __split_vma+0x5af/0x950 [ 37.430388] ? __pfx___split_vma+0x10/0x10 [ 37.430917] ? find_held_lock+0x2c/0x110 [ 37.431433] do_vmi_align_munmap+0x2ba/0x11f0 [ 37.431993] ? lock_is_held_type+0x9f/0x120 [ 37.432531] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 37.433148] ? mtree_range_walk+0x632/0x900 [ 37.433696] ? mas_walk+0x5c7/0x7c0 [ 37.434169] do_vmi_munmap+0x1f1/0x2b0 [ 37.434662] mmap_region+0x1f9/0x2660 [ 37.435142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 37.435657] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 37.436368] ? __pfx_lock_acquire+0x10/0x10 [ 37.436894] ? __pfx_mmap_region+0x10/0x10 [ 37.437448] ? security_mmap_addr+0x7d/0xa0 [ 37.437983] ? get_unmapped_area+0x1f5/0x3f0 [ 37.438552] do_mmap+0x854/0xf00 [ 37.438988] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.439480] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 37.440034] ksys_mmap_pgoff+0x3af/0x500 [ 37.440540] do_syscall_64+0x3f/0x90 [ 37.441018] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.441662] RIP: 0033:0x7fbf03b10d82 [ 37.442117] 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 [ 37.444223] RSP: 002b:00007ffd7f76b338 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 37.445137] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbf03b10d82 [ 37.445996] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbf02f4a000 [ 37.446837] RBP: 00007fbf02f4a000 R08: 0000000000000009 R09: 0000000000001000 [ 37.447684] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f28b599d90 [ 37.448563] R13: 00007ffd7f76b350 R14: 00007ffd7f76b380 R15: 00007ffd7f76b6e0 [ 37.449425] </TASK> [ 37.449717] [ 37.449929] Allocated by task 211: [ 37.450360] kasan_save_stack+0x22/0x50 [ 37.450865] kasan_set_track+0x25/0x30 [ 37.451354] __kasan_slab_alloc+0x59/0x70 [ 37.451876] kmem_cache_alloc+0x16b/0x370 [ 37.452390] vm_area_dup+0x20/0x160 [ 37.452844] __split_vma+0x170/0x950 [ 37.453330] split_vma+0xc6/0x110 [ 37.453771] mprotect_fixup+0x8d2/0xb30 [ 37.454273] do_mprotect_pkey+0x87e/0xd40 [ 37.454794] __x64_sys_mprotect+0x78/0xc0 [ 37.455319] do_syscall_64+0x3f/0x90 [ 37.455791] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.456424] [ 37.456639] Freed by task 211: [ 37.457039] kasan_save_stack+0x22/0x50 [ 37.457544] kasan_set_track+0x25/0x30 [ 37.458038] kasan_save_free_info+0x2b/0x50 [ 37.458570] __kasan_slab_free+0x10a/0x190 [ 37.459101] kmem_cache_free+0x10d/0x4d0 [ 37.459610] rcu_core+0x8c8/0x2860 [ 37.460052] __do_softirq+0x1b7/0x7d4 [ 37.460573] [ 37.460839] Last potentially related work creation: [ 37.461450] kasan_save_stack+0x22/0x50 [ 37.461950] __kasan_record_aux_stack+0x8e/0xa0 [ 37.462583] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.463232] remove_vma+0x139/0x170 [ 37.463686] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.464237] do_vmi_munmap+0x1f1/0x2b0 [ 37.464739] __vm_munmap+0x138/0x3a0 [ 37.465219] __x64_sys_munmap+0x59/0x80 [ 37.465715] do_syscall_64+0x3f/0x90 [ 37.466186] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.466828] [ 37.467041] Second to last potentially related work creation: [ 37.467717] kasan_save_stack+0x22/0x50 [ 37.468220] __kasan_record_aux_stack+0x8e/0xa0 [ 37.468803] __call_rcu_common.constprop.0+0x6a/0xb90 [ 37.469470] remove_vma+0x139/0x170 [ 37.469938] do_vmi_align_munmap+0xd4a/0x11f0 [ 37.470493] do_vmi_munmap+0x1f1/0x2b0 [ 37.470978] mmap_region+0x1f9/0x2660 [ 37.471459] do_mmap+0x854/0xf00 [ 37.471894] vm_mmap_pgoff+0x1a6/0x3a0 [ 37.472384] ksys_mmap_pgoff+0x3af/0x500 [ 37.472886] do_syscall_64+0x3f/0x90 [ 37.473370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 37.474006] [ 37.474220] The buggy address belongs to the object at ffff88800d6b2570 [ 37.474220] which belongs to the cache vm_area_struct of size 168 [ 37.475673] The buggy address is located 88 bytes inside of [ 37.475673] freed 168-byte region [ffff88800d6b2570, ffff88800d6b2618) [ 37.477089] [ 37.477305] The buggy address belongs to the physical page: [ 37.477961] page:000000005857194f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd6b2 [ 37.479049] memcg:ffff88800d121801 [ 37.479478] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 37.480174] page_type: 0xffffffff() [ 37.480656] raw: 0100000000000200 ffff88800879fc80 ffffea00003304c0 dead000000000007 [ 37.481590] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d121801 [ 37.482494] page dumped because: kasan: bad access detected [ 37.483154] [ 37.483367] Memory state around the buggy address: [ 37.483942] ffff88800d6b2480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.484818] ffff88800d6b2500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 37.485748] >ffff88800d6b2580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 37.486614] ^ [ 37.487296] ffff88800d6b2600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 37.488153] ffff88800d6b2680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 37.489025] ================================================================== [ 37.489949] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 39.986049] BUG: Bad rss-counter state mm:00000000531abcbb type:MM_FILEPAGES val:33 [ 39.987037] BUG: Bad rss-counter state mm:00000000531abcbb type:MM_ANONPAGES val:22 [ 40.490220] BUG: Bad rss-counter state mm:0000000011c89d70 type:MM_FILEPAGES val:33 [ 40.491399] BUG: Bad rss-counter state mm:0000000011c89d70 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6629' (ECDSA) to the list of known hosts. 2023/06/19 11:58:49 fuzzer started 2023/06/19 11:58:49 dialing manager at localhost:44161 2023/06/19 11:58:49 checking machine... 2023/06/19 11:58:49 checking revisions... [ 41.228645] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:58:49 testing simple program... [ 41.265503] cgroup: Unknown subsys name 'net' [ 41.315680] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:58:42 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffffffff85dfc6a8 RCX=ffffffff8180995c RDX=0000000000000000 RSI=ffffffff86137004 RDI=ffffffff85dfc6a4 RBP=ffffffff85dfc6a8 RSP=ffff88806ce099e0 R8 =ffffffff86137004 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020cb4 R12=ffffffff85dfc6a8 R13=ffffffff85dfc6a4 R14=ffffffff85dfc6a4 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007fa18a972900 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=00007ffefc631000 CR3=000000001641c000 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=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 info registers vcpu 1 RAX=ffffffff813782a8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888008e57a01 RSI=ffff888008e57a10 RDI=ffff888008e57a10 RBP=ffff888008e579d0 RSP=ffff888008e578b8 R8 =0000000000000001 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008e579d8 R13=ffff888008e579c0 R14=ffff888008e57a10 R15=ffff888008e57978 RIP=ffffffff81131236 RFL=00000202 [-------] 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 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=00007f6e99bb3580 CR3=0000000017a9e000 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=2038343a38353a3131203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a38353a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000