[ 36.213405] BUG: Bad rss-counter state mm:00000000d6b4613b type:MM_FILEPAGES val:33 [ 36.214417] BUG: Bad rss-counter state mm:00000000d6b4613b type:MM_ANONPAGES val:22 [ 36.249535] ================================================================== [ 36.250503] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.251450] Read of size 8 at addr ffff88801667e5c8 by task sshd/226 [ 36.252318] [ 36.252543] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.253415] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.254440] Call Trace: [ 36.254772] [ 36.255062] dump_stack_lvl+0x91/0xf0 [ 36.255556] print_report+0xcc/0x620 [ 36.256051] ? __virt_addr_valid+0x102/0x340 [ 36.256642] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.257271] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.257894] kasan_report+0xbe/0xf0 [ 36.258369] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.258997] vma_interval_tree_remove+0xc75/0xec0 [ 36.259604] vma_prepare+0xc54/0x11a0 [ 36.260090] __split_vma+0x5af/0x950 [ 36.260578] ? __pfx___split_vma+0x10/0x10 [ 36.261111] ? find_held_lock+0x2c/0x110 [ 36.261631] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.262199] ? lock_is_held_type+0x9f/0x120 [ 36.262734] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.263359] ? mtree_range_walk+0x632/0x900 [ 36.263917] ? mas_walk+0x5c7/0x7c0 [ 36.264409] do_vmi_munmap+0x1f1/0x2b0 [ 36.264900] mmap_region+0x1f9/0x2660 [ 36.265388] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.265906] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.266638] ? __pfx_lock_acquire+0x10/0x10 [ 36.267189] ? __pfx_mmap_region+0x10/0x10 [ 36.267723] ? security_mmap_addr+0x7d/0xa0 [ 36.268259] ? get_unmapped_area+0x1f5/0x3f0 [ 36.268819] do_mmap+0x854/0xf00 [ 36.269261] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.269765] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.270329] ksys_mmap_pgoff+0x3af/0x500 [ 36.270837] do_syscall_64+0x3f/0x90 [ 36.271323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.271968] RIP: 0033:0x7fed0292dd82 [ 36.272448] 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 [ 36.274569] RSP: 002b:00007ffce7ae7458 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.275463] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fed0292dd82 [ 36.276312] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fed01d67000 [ 36.277155] RBP: 00007fed01d67000 R08: 0000000000000009 R09: 0000000000001000 [ 36.278010] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556f270c8f70 [ 36.278862] R13: 00007ffce7ae7470 R14: 00007ffce7ae74a0 R15: 00007ffce7ae7800 [ 36.279733] [ 36.280026] [ 36.280244] Allocated by task 213: [ 36.280681] kasan_save_stack+0x22/0x50 [ 36.281186] kasan_set_track+0x25/0x30 [ 36.281680] __kasan_slab_alloc+0x59/0x70 [ 36.282206] kmem_cache_alloc+0x16b/0x370 [ 36.282724] vm_area_dup+0x20/0x160 [ 36.283189] __split_vma+0x170/0x950 [ 36.283656] split_vma+0xc6/0x110 [ 36.284096] mprotect_fixup+0x8d2/0xb30 [ 36.284614] do_mprotect_pkey+0x87e/0xd40 [ 36.285134] __x64_sys_mprotect+0x78/0xc0 [ 36.285656] do_syscall_64+0x3f/0x90 [ 36.286127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.286767] [ 36.286989] Freed by task 213: [ 36.287382] kasan_save_stack+0x22/0x50 [ 36.287885] kasan_set_track+0x25/0x30 [ 36.288393] kasan_save_free_info+0x2b/0x50 [ 36.288926] __kasan_slab_free+0x10a/0x190 [ 36.289458] kmem_cache_free+0x10d/0x4d0 [ 36.289968] rcu_core+0x8c8/0x2860 [ 36.290411] __do_softirq+0x1b7/0x7d4 [ 36.290887] [ 36.291100] Last potentially related work creation: [ 36.291716] kasan_save_stack+0x22/0x50 [ 36.292231] __kasan_record_aux_stack+0x8e/0xa0 [ 36.292833] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.293488] remove_vma+0x139/0x170 [ 36.293938] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.294504] do_vmi_munmap+0x1f1/0x2b0 [ 36.294998] __vm_munmap+0x138/0x3a0 [ 36.295477] __x64_sys_munmap+0x59/0x80 [ 36.295994] do_syscall_64+0x3f/0x90 [ 36.296489] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.297146] [ 36.297367] The buggy address belongs to the object at ffff88801667e570 [ 36.297367] which belongs to the cache vm_area_struct of size 168 [ 36.298894] The buggy address is located 88 bytes inside of [ 36.298894] freed 168-byte region [ffff88801667e570, ffff88801667e618) [ 36.300330] [ 36.300554] The buggy address belongs to the physical page: [ 36.301227] page:000000008fbdddf1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1667e [ 36.302339] memcg:ffff88801667d101 [ 36.302765] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.303415] page_type: 0xffffffff() [ 36.303865] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.304808] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801667d101 [ 36.305709] page dumped because: kasan: bad access detected [ 36.306371] [ 36.306588] Memory state around the buggy address: [ 36.307175] ffff88801667e480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.308040] ffff88801667e500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 36.308910] >ffff88801667e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.309764] ^ [ 36.310443] ffff88801667e600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 36.311295] ffff88801667e680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.312145] ================================================================== [ 36.313197] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 37.798532] BUG: Bad rss-counter state mm:000000002b083aea type:MM_FILEPAGES val:33 [ 37.799726] BUG: Bad rss-counter state mm:000000002b083aea type:MM_ANONPAGES val:22 [ 38.223335] BUG: Bad rss-counter state mm:0000000003a9bb68 type:MM_FILEPAGES val:33 [ 38.224590] BUG: Bad rss-counter state mm:0000000003a9bb68 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20475' (ECDSA) to the list of known hosts. 2023/06/20 07:25:13 fuzzer started 2023/06/20 07:25:13 dialing manager at localhost:44161 2023/06/20 07:25:13 checking machine... 2023/06/20 07:25:13 checking revisions... [ 38.943293] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:25:13 testing simple program... [ 38.996825] cgroup: Unknown subsys name 'net' [ 39.036869] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:25:07 Registers: info registers vcpu 0 RAX=0000000040000000 RBX=ffff888019794d00 RCX=ffffffff810b59b1 RDX=ffff888019793680 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff888019794d10 RSP=ffff8880146cf980 R8 =0000000000000006 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=0000000000000007 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff810b5a8a RFL=00000046 [---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 00007fa3eb2d7900 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=0000561fbe1d6768 CR3=000000000948c000 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=ff0000000000ffff0000000000ff0000 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019793680 RBX=0000000000000019 RCX=0000000000000019 RDX=ffff888019793680 RSI=ffffffff81f584e3 RDI=0000000000000001 RBP=0000000000000019 RSP=ffff88800e7a7a78 R8 =0000000000000000 R9 =ffff88800e7a7d68 R10=0000000000000001 R11=00000000000b6996 R12=ffff88800e7a7d68 R13=0000000000000001 R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff81f58522 RFL=00000282 [--S----] 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 00007fa3eb2d7900 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=00007fa3eb88c650 CR3=000000000e544000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000