[ 31.088097] BUG: Bad rss-counter state mm:0000000077b8f7f9 type:MM_FILEPAGES val:33 [ 31.089340] BUG: Bad rss-counter state mm:0000000077b8f7f9 type:MM_ANONPAGES val:22 [ 31.247685] ================================================================== [ 31.248662] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.249665] Read of size 8 at addr ffff88800e7c4a50 by task sshd/218 [ 31.250541] [ 31.250802] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.251714] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.252766] Call Trace: [ 31.253105] [ 31.253452] dump_stack_lvl+0x91/0xf0 [ 31.253983] print_report+0xcc/0x620 [ 31.254509] ? __virt_addr_valid+0x102/0x340 [ 31.255106] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.255784] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.256466] kasan_report+0xbe/0xf0 [ 31.256985] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.257671] vma_interval_tree_remove+0xc75/0xec0 [ 31.258322] vma_prepare+0xc54/0x11a0 [ 31.258834] __split_vma+0x5af/0x950 [ 31.259343] ? __pfx___split_vma+0x10/0x10 [ 31.259913] ? find_held_lock+0x2c/0x110 [ 31.260470] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.261079] ? lock_is_held_type+0x9f/0x120 [ 31.261670] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.262313] ? mtree_range_walk+0x632/0x900 [ 31.262901] ? mas_walk+0x5c7/0x7c0 [ 31.263405] do_vmi_munmap+0x1f1/0x2b0 [ 31.263939] mmap_region+0x1f9/0x2660 [ 31.264456] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.264999] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.265779] ? __pfx_lock_acquire+0x10/0x10 [ 31.266345] ? __pfx_mmap_region+0x10/0x10 [ 31.266908] ? security_mmap_addr+0x7d/0xa0 [ 31.267475] ? get_unmapped_area+0x1f5/0x3f0 [ 31.268064] do_mmap+0x854/0xf00 [ 31.268532] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.269059] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.269676] ksys_mmap_pgoff+0x3af/0x500 [ 31.270216] do_syscall_64+0x3f/0x90 [ 31.270725] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.271415] RIP: 0033:0x7ff53c75cd82 [ 31.271905] 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 [ 31.274161] RSP: 002b:00007ffc8edc04b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.275114] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff53c75cd82 [ 31.276019] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff53bb96000 [ 31.276914] RBP: 00007ff53bb96000 R08: 0000000000000009 R09: 0000000000001000 [ 31.277829] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e16c49eec0 [ 31.278725] R13: 00007ffc8edc04d0 R14: 00007ffc8edc0500 R15: 00007ffc8edc0860 [ 31.279638] [ 31.279948] [ 31.280177] Allocated by task 211: [ 31.280638] kasan_save_stack+0x22/0x50 [ 31.281172] kasan_set_track+0x25/0x30 [ 31.281714] __kasan_slab_alloc+0x59/0x70 [ 31.282282] kmem_cache_alloc+0x16b/0x370 [ 31.282837] vm_area_dup+0x20/0x160 [ 31.283318] __split_vma+0x170/0x950 [ 31.283814] split_vma+0xc6/0x110 [ 31.284278] mprotect_fixup+0x8d2/0xb30 [ 31.284814] do_mprotect_pkey+0x87e/0xd40 [ 31.285391] __x64_sys_mprotect+0x78/0xc0 [ 31.285951] do_syscall_64+0x3f/0x90 [ 31.286456] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.287142] [ 31.287372] Freed by task 211: [ 31.287792] kasan_save_stack+0x22/0x50 [ 31.288326] kasan_set_track+0x25/0x30 [ 31.288852] kasan_save_free_info+0x2b/0x50 [ 31.289430] __kasan_slab_free+0x10a/0x190 [ 31.289992] kmem_cache_free+0x10d/0x4d0 [ 31.290540] rcu_core+0x8c8/0x2860 [ 31.291010] __do_softirq+0x1b7/0x7d4 [ 31.291533] [ 31.291767] Last potentially related work creation: [ 31.292410] kasan_save_stack+0x22/0x50 [ 31.292962] __kasan_record_aux_stack+0x8e/0xa0 [ 31.293589] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.294261] remove_vma+0x139/0x170 [ 31.294742] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.295334] do_vmi_munmap+0x1f1/0x2b0 [ 31.295858] __vm_munmap+0x138/0x3a0 [ 31.296355] __x64_sys_munmap+0x59/0x80 [ 31.296890] do_syscall_64+0x3f/0x90 [ 31.297400] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298092] [ 31.298326] Second to last potentially related work creation: [ 31.299052] kasan_save_stack+0x22/0x50 [ 31.299574] __kasan_record_aux_stack+0x8e/0xa0 [ 31.300189] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.300865] remove_vma+0x139/0x170 [ 31.301357] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.301938] do_vmi_munmap+0x1f1/0x2b0 [ 31.302448] mmap_region+0x1f9/0x2660 [ 31.302949] do_mmap+0x854/0xf00 [ 31.303409] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.303926] ksys_mmap_pgoff+0x3af/0x500 [ 31.304451] do_syscall_64+0x3f/0x90 [ 31.304959] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.305649] [ 31.305881] The buggy address belongs to the object at ffff88800e7c49f8 [ 31.305881] which belongs to the cache vm_area_struct of size 168 [ 31.307441] The buggy address is located 88 bytes inside of [ 31.307441] freed 168-byte region [ffff88800e7c49f8, ffff88800e7c4aa0) [ 31.308911] [ 31.309140] The buggy address belongs to the physical page: [ 31.309852] page:00000000ff04eb2d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe7c4 [ 31.310994] memcg:ffff88800e7a9901 [ 31.311435] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.312117] page_type: 0xffffffff() [ 31.312595] raw: 0100000000000200 ffff8880087a0c80 ffffea0000369700 dead000000000008 [ 31.313584] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e7a9901 [ 31.314523] page dumped because: kasan: bad access detected [ 31.315219] [ 31.315452] Memory state around the buggy address: [ 31.316087] ffff88800e7c4900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.316993] ffff88800e7c4980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.317922] >ffff88800e7c4a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.318818] ^ [ 31.319572] ffff88800e7c4a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.320485] ffff88800e7c4b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.321412] ================================================================== [ 31.322646] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 34.100434] BUG: Bad rss-counter state mm:00000000a6bd94d8 type:MM_FILEPAGES val:33 [ 34.102071] BUG: Bad rss-counter state mm:00000000a6bd94d8 type:MM_ANONPAGES val:22 [ 34.590588] BUG: Bad rss-counter state mm:00000000cd375753 type:MM_FILEPAGES val:33 [ 34.591839] BUG: Bad rss-counter state mm:00000000cd375753 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52864' (ECDSA) to the list of known hosts. 2023/06/20 11:56:43 fuzzer started 2023/06/20 11:56:43 dialing manager at localhost:36067 2023/06/20 11:56:43 checking machine... 2023/06/20 11:56:43 checking revisions... [ 35.330150] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:56:43 testing simple program... [ 35.379366] cgroup: Unknown subsys name 'net' [ 35.422944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:56:43 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=ffffffff84537da6 RDX=dffffc0000000000 RSI=ffffffff84537da7 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000000fdcc R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 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 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=00007f089afaf7f0 CR3=0000000016306000 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=2032343a36353a3131203032206e754a XMM01=6964206465766965636552203a5d3732 XMM02=6f63736964203a31313a343136363420 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032343a36353a3131203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c09d7d RBX=ffffffff8604ebe8 RCX=ffffffff8450cc8b RDX=0000000000000000 RSI=ffffffff864b2008 RDI=ffffffff8604ebc4 RBP=ffffffff8604ebe0 RSP=ffff88800f8979e0 R8 =ffffffff864b2008 R9 =ffff88800f897ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffffffff8604ebf4 R13=ffffffff8604ebc4 R14=ffffffff8604ebdc R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000216 [----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 00007f54aa8af900 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=00007f54aae64650 CR3=0000000009514000 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=000000000000000000ffff0000000000 XMM02=2f00646f6874656d5f74707972636e65 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff00ffffffffffffffffffffffffffff XMM08=20002020202020200020202020202020 XMM09=0000ffffffffffffffffffffffffffff XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000