[ 34.070807] BUG: Bad rss-counter state mm:00000000548b64c3 type:MM_FILEPAGES val:33 [ 34.072000] BUG: Bad rss-counter state mm:00000000548b64c3 type:MM_ANONPAGES val:22 [ 34.227069] ================================================================== [ 34.227966] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.228892] Read of size 8 at addr ffff8880169a9b38 by task sshd/219 [ 34.229765] [ 34.229980] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.230839] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.231819] Call Trace: [ 34.232132] [ 34.232410] dump_stack_lvl+0x91/0xf0 [ 34.232894] print_report+0xcc/0x620 [ 34.233367] ? __virt_addr_valid+0x102/0x340 [ 34.233909] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.234523] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.235130] kasan_report+0xbe/0xf0 [ 34.235599] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.236202] vma_interval_tree_remove+0xc75/0xec0 [ 34.236792] vma_prepare+0xc54/0x11a0 [ 34.237260] __split_vma+0x5af/0x950 [ 34.237724] ? __pfx___split_vma+0x10/0x10 [ 34.238242] ? find_held_lock+0x2c/0x110 [ 34.238772] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.239325] ? lock_is_held_type+0x9f/0x120 [ 34.239857] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.240451] ? mtree_range_walk+0x632/0x900 [ 34.240993] ? mas_walk+0x5c7/0x7c0 [ 34.241457] do_vmi_munmap+0x1f1/0x2b0 [ 34.241941] mmap_region+0x1f9/0x2660 [ 34.242416] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.242939] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.243640] ? __pfx_lock_acquire+0x10/0x10 [ 34.244162] ? __pfx_mmap_region+0x10/0x10 [ 34.244683] ? security_mmap_addr+0x7d/0xa0 [ 34.245199] ? get_unmapped_area+0x1f5/0x3f0 [ 34.245740] do_mmap+0x854/0xf00 [ 34.246173] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.246668] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.247219] ksys_mmap_pgoff+0x3af/0x500 [ 34.247716] do_syscall_64+0x3f/0x90 [ 34.248184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.248818] RIP: 0033:0x7fa8d81b1d82 [ 34.249266] 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 [ 34.251371] RSP: 002b:00007fff364ac0b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.252254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa8d81b1d82 [ 34.253078] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa8d75eb000 [ 34.253908] RBP: 00007fa8d75eb000 R08: 0000000000000009 R09: 0000000000001000 [ 34.254760] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561008566ec0 [ 34.255590] R13: 00007fff364ac0d0 R14: 00007fff364ac100 R15: 00007fff364ac460 [ 34.256429] [ 34.256718] [ 34.256928] Allocated by task 212: [ 34.257346] kasan_save_stack+0x22/0x50 [ 34.257841] kasan_set_track+0x25/0x30 [ 34.258322] __kasan_slab_alloc+0x59/0x70 [ 34.258842] kmem_cache_alloc+0x16b/0x370 [ 34.259347] vm_area_dup+0x20/0x160 [ 34.259799] __split_vma+0x170/0x950 [ 34.260258] split_vma+0xc6/0x110 [ 34.260691] mprotect_fixup+0x8d2/0xb30 [ 34.261186] do_mprotect_pkey+0x87e/0xd40 [ 34.261696] __x64_sys_mprotect+0x78/0xc0 [ 34.262208] do_syscall_64+0x3f/0x90 [ 34.262690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.263319] [ 34.263533] Freed by task 212: [ 34.263919] kasan_save_stack+0x22/0x50 [ 34.264412] kasan_set_track+0x25/0x30 [ 34.264906] kasan_save_free_info+0x2b/0x50 [ 34.265431] __kasan_slab_free+0x10a/0x190 [ 34.265951] kmem_cache_free+0x10d/0x4d0 [ 34.266451] rcu_core+0x8c8/0x2860 [ 34.266893] __do_softirq+0x1b7/0x7d4 [ 34.267369] [ 34.267581] Last potentially related work creation: [ 34.268154] kasan_save_stack+0x22/0x50 [ 34.268647] __kasan_record_aux_stack+0x8e/0xa0 [ 34.269210] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.269843] remove_vma+0x139/0x170 [ 34.270283] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.270843] do_vmi_munmap+0x1f1/0x2b0 [ 34.271329] __vm_munmap+0x138/0x3a0 [ 34.271796] __x64_sys_munmap+0x59/0x80 [ 34.272285] do_syscall_64+0x3f/0x90 [ 34.272754] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.273385] [ 34.273599] The buggy address belongs to the object at ffff8880169a9ae0 [ 34.273599] which belongs to the cache vm_area_struct of size 168 [ 34.275074] The buggy address is located 88 bytes inside of [ 34.275074] freed 168-byte region [ffff8880169a9ae0, ffff8880169a9b88) [ 34.276484] [ 34.276697] The buggy address belongs to the physical page: [ 34.277356] page:00000000e40ed292 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x169a9 [ 34.278438] memcg:ffff88800e1e9101 [ 34.278867] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.279509] page_type: 0xffffffff() [ 34.279959] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.280866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1e9101 [ 34.281763] page dumped because: kasan: bad access detected [ 34.282411] [ 34.282632] Memory state around the buggy address: [ 34.283202] ffff8880169a9a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.284041] ffff8880169a9a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 34.284883] >ffff8880169a9b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.285728] ^ [ 34.286332] ffff8880169a9b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 34.287193] ffff8880169a9c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 34.288032] ================================================================== [ 34.288985] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 36.437515] BUG: Bad rss-counter state mm:00000000d321a62d type:MM_FILEPAGES val:33 [ 36.438453] BUG: Bad rss-counter state mm:00000000d321a62d type:MM_ANONPAGES val:22 [ 37.027780] BUG: Bad rss-counter state mm:00000000d5ae3f8a type:MM_FILEPAGES val:33 [ 37.029097] BUG: Bad rss-counter state mm:00000000d5ae3f8a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6654' (ECDSA) to the list of known hosts. 2023/06/19 18:20:51 fuzzer started 2023/06/19 18:20:51 dialing manager at localhost:44161 2023/06/19 18:20:51 checking machine... 2023/06/19 18:20:51 checking revisions... [ 37.679750] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:20:52 testing simple program... [ 37.742266] cgroup: Unknown subsys name 'net' [ 37.835030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:20:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=ffffffff815a72a5 RDX=ffff8880141db680 RSI=0000000000000000 RDI=0000000000000006 RBP=ffff88801424fd28 RSP=ffff88801424fc58 R8 =0000000000000006 R9 =0000000000000101 R10=00000000000000ff R11=0000000000000000 R12=00000000000000ff R13=ffff88801424fd60 R14=0000000000000101 R15=ffffc9000068d768 RIP=ffffffff814c01fc 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 00007fbe8b7b5900 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=00007fbe8ac0f530 CR3=000000000ca18000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=2bf4f73dc1d7fd0d00000000000ae988 XMM05=d0ae4fcbebf0d6c90000000000134368 XMM06=dfcdbad4f1609c370000000000132eb0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888008e50000 RBX=ffff888008e579c0 RCX=0000000000000001 RDX=ffff888008e57930 RSI=ffff888008e578f8 RDI=ffff888008e57938 RBP=dffffc0000000000 RSP=ffff888008e578d8 R8 =0000000000000001 R9 =ffff888008e57968 R10=0000000000038001 R11=0000000000006097 R12=ffffed10011caf27 R13=ffffed10011caf26 R14=ffff888008e57970 R15=ffff888008e57928 RIP=ffffffff81132fbf 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 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=00007f2606be8618 CR3=0000000016a8c000 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=30323a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343632 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000