[ 112.348052] BUG: Bad rss-counter state mm:0000000052ec47ca type:MM_FILEPAGES val:33 [ 112.349590] BUG: Bad rss-counter state mm:0000000052ec47ca type:MM_ANONPAGES val:22 [ 112.390305] ================================================================== [ 112.391237] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 112.392173] Read of size 8 at addr ffff88800e847c20 by task sshd/219 [ 112.392942] [ 112.393162] CPU: 0 PID: 219 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 112.394189] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 112.395183] Call Trace: [ 112.395504] [ 112.395792] dump_stack_lvl+0x91/0xf0 [ 112.396282] print_report+0xcc/0x620 [ 112.396762] ? __virt_addr_valid+0x102/0x340 [ 112.397315] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.397938] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.398574] kasan_report+0xbe/0xf0 [ 112.399050] ? vma_interval_tree_remove+0xc75/0xec0 [ 112.399676] vma_interval_tree_remove+0xc75/0xec0 [ 112.400281] vma_prepare+0xc54/0x11a0 [ 112.400768] __split_vma+0x5af/0x950 [ 112.401241] ? __pfx___split_vma+0x10/0x10 [ 112.401787] ? find_held_lock+0x2c/0x110 [ 112.402320] do_vmi_align_munmap+0x2ba/0x11f0 [ 112.403081] ? lock_is_held_type+0x9f/0x120 [ 112.403639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 112.404264] ? mtree_range_walk+0x632/0x900 [ 112.404824] ? mas_walk+0x5c7/0x7c0 [ 112.405318] do_vmi_munmap+0x1f1/0x2b0 [ 112.405832] mmap_region+0x1f9/0x2660 [ 112.406339] ? vm_mmap_pgoff+0x15c/0x3a0 [ 112.406864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 112.407590] ? __pfx_lock_acquire+0x10/0x10 [ 112.408135] ? __pfx_mmap_region+0x10/0x10 [ 112.408675] ? security_mmap_addr+0x7d/0xa0 [ 112.409224] ? get_unmapped_area+0x1f5/0x3f0 [ 112.409792] do_mmap+0x854/0xf00 [ 112.410253] vm_mmap_pgoff+0x1a6/0x3a0 [ 112.410767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 112.411345] ksys_mmap_pgoff+0x3af/0x500 [ 112.411880] do_syscall_64+0x3f/0x90 [ 112.412359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.412995] RIP: 0033:0x7f06fd3a7d82 [ 112.413460] 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 [ 112.415715] RSP: 002b:00007ffd1564b838 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 112.416631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f06fd3a7d82 [ 112.417483] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f06fc7e1000 [ 112.418350] RBP: 00007f06fc7e1000 R08: 0000000000000009 R09: 0000000000001000 [ 112.419193] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557de48c6ec0 [ 112.420048] R13: 00007ffd1564b850 R14: 00007ffd1564b880 R15: 00007ffd1564bbe0 [ 112.420913] [ 112.421206] [ 112.421424] Allocated by task 211: [ 112.421862] kasan_save_stack+0x22/0x50 [ 112.422383] kasan_set_track+0x25/0x30 [ 112.422880] __kasan_slab_alloc+0x59/0x70 [ 112.423398] kmem_cache_alloc+0x16b/0x370 [ 112.423910] vm_area_dup+0x20/0x160 [ 112.424362] __split_vma+0x170/0x950 [ 112.424827] split_vma+0xc6/0x110 [ 112.425266] mprotect_fixup+0x8d2/0xb30 [ 112.425778] do_mprotect_pkey+0x87e/0xd40 [ 112.426317] __x64_sys_mprotect+0x78/0xc0 [ 112.426837] do_syscall_64+0x3f/0x90 [ 112.427311] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.427946] [ 112.428160] Freed by task 211: [ 112.428549] kasan_save_stack+0x22/0x50 [ 112.429060] kasan_set_track+0x25/0x30 [ 112.429554] kasan_save_free_info+0x2b/0x50 [ 112.430085] __kasan_slab_free+0x10a/0x190 [ 112.430629] kmem_cache_free+0x10d/0x4d0 [ 112.431145] rcu_core+0x8c8/0x2860 [ 112.431587] __do_softirq+0x1b7/0x7d4 [ 112.432063] [ 112.432278] Last potentially related work creation: [ 112.432859] kasan_save_stack+0x22/0x50 [ 112.433359] __kasan_record_aux_stack+0x8e/0xa0 [ 112.433932] __call_rcu_common.constprop.0+0x6a/0xb90 [ 112.434581] remove_vma+0x139/0x170 [ 112.435038] do_vmi_align_munmap+0xd4a/0x11f0 [ 112.435593] do_vmi_munmap+0x1f1/0x2b0 [ 112.436084] __vm_munmap+0x138/0x3a0 [ 112.436550] __x64_sys_munmap+0x59/0x80 [ 112.437043] do_syscall_64+0x3f/0x90 [ 112.437518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 112.438166] [ 112.438404] The buggy address belongs to the object at ffff88800e847bc8 [ 112.438404] which belongs to the cache vm_area_struct of size 168 [ 112.439867] The buggy address is located 88 bytes inside of [ 112.439867] freed 168-byte region [ffff88800e847bc8, ffff88800e847c70) [ 112.441267] [ 112.441486] The buggy address belongs to the physical page: [ 112.442144] page:000000008f5b491a refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe847 [ 112.443245] memcg:ffff888009486101 [ 112.443670] flags: 0x100000000000200(slab|node=0|zone=1) [ 112.444322] page_type: 0xffffffff() [ 112.444769] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 112.445684] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009486101 [ 112.446601] page dumped because: kasan: bad access detected [ 112.447258] [ 112.447472] Memory state around the buggy address: [ 112.448051] ffff88800e847b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 112.448906] ffff88800e847b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 112.449751] >ffff88800e847c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 112.450611] ^ [ 112.451153] ffff88800e847c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 112.452003] ffff88800e847d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 112.452843] ================================================================== [ 112.455480] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 114.477356] BUG: Bad rss-counter state mm:0000000081d223e8 type:MM_FILEPAGES val:33 [ 114.478564] BUG: Bad rss-counter state mm:0000000081d223e8 type:MM_ANONPAGES val:22 [ 114.880066] BUG: Bad rss-counter state mm:0000000056a7f5d2 type:MM_FILEPAGES val:33 [ 114.881134] BUG: Bad rss-counter state mm:0000000056a7f5d2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20753' (ECDSA) to the list of known hosts. 2023/06/20 04:01:15 fuzzer started 2023/06/20 04:01:15 dialing manager at localhost:44161 2023/06/20 04:01:15 checking machine... 2023/06/20 04:01:15 checking revisions... [ 115.627148] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:01:16 testing simple program... [ 115.680519] cgroup: Unknown subsys name 'net' [ 115.721846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:59:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff83642d11 RDX=dffffc0000000000 RSI=ffffffff83642d12 RDI=ffff888015927410 RBP=ffff888015927468 RSP=ffff8880159273a0 R8 =0000000000000001 R9 =ffff888015927450 R10=0000000000038001 R11=000000000008a85c R12=ffff888015927470 R13=ffff888015927458 R14=ffff888015927451 R15=ffff888015927410 RIP=ffffffff8113071f RFL=00000286 [--S--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 00007f770f046900 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=00007f770f5fd618 CR3=000000000e292000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000283 RCX=1ffff11003783763 RDX=1ffff11001fc3455 RSI=ffffffff845136aa RDI=ffffffff856d8238 RBP=1ffff1100d9e13a3 RSP=ffff88806cf09d08 R8 =0000000000000001 R9 =ffffed100d9e13ab R10=0000000000000003 R11=0000000000000000 R12=ffffffff856d8238 R13=ffffffff845136aa R14=ffffffff818d9dc6 R15=ffff88800da48b80 RIP=ffffffff812d8649 RFL=00000016 [----AP-] 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=00007f6ad80b3b40 CR3=000000000feae000 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=2035313a31303a3430203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035313a31303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000