[ 23.928804] BUG: Bad rss-counter state mm:000000006a4e4963 type:MM_FILEPAGES val:33 [ 23.930703] BUG: Bad rss-counter state mm:000000006a4e4963 type:MM_ANONPAGES val:22 [ 24.092072] ================================================================== [ 24.092998] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.093929] Read of size 8 at addr ffff88800dccb5c8 by task sshd/219 [ 24.094694] [ 24.095023] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.095895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.096858] Call Trace: [ 24.097200] [ 24.097483] dump_stack_lvl+0x91/0xf0 [ 24.097972] print_report+0xcc/0x620 [ 24.098454] ? __virt_addr_valid+0x102/0x340 [ 24.099005] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.099636] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.100245] kasan_report+0xbe/0xf0 [ 24.100736] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.101347] vma_interval_tree_remove+0xc75/0xec0 [ 24.101942] vma_prepare+0xc54/0x11a0 [ 24.102418] __split_vma+0x5af/0x950 [ 24.102886] ? __pfx___split_vma+0x10/0x10 [ 24.103412] ? find_held_lock+0x2c/0x110 [ 24.103939] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.104505] ? lock_is_held_type+0x9f/0x120 [ 24.105042] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.105645] ? mtree_range_walk+0x632/0x900 [ 24.106190] ? mas_walk+0x5c7/0x7c0 [ 24.106667] do_vmi_munmap+0x1f1/0x2b0 [ 24.107151] mmap_region+0x1f9/0x2660 [ 24.107640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.108156] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.108877] ? __pfx_lock_acquire+0x10/0x10 [ 24.109405] ? __pfx_mmap_region+0x10/0x10 [ 24.109938] ? security_mmap_addr+0x7d/0xa0 [ 24.110468] ? get_unmapped_area+0x1f5/0x3f0 [ 24.111014] do_mmap+0x854/0xf00 [ 24.111449] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.111961] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.112531] ksys_mmap_pgoff+0x3af/0x500 [ 24.113043] do_syscall_64+0x3f/0x90 [ 24.113519] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.114170] RIP: 0033:0x7fab760e2d82 [ 24.114630] 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 [ 24.116737] RSP: 002b:00007ffcbe078ee8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.117641] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab760e2d82 [ 24.118474] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab7551c000 [ 24.119318] RBP: 00007fab7551c000 R08: 0000000000000009 R09: 0000000000001000 [ 24.120186] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562026cccf70 [ 24.121031] R13: 00007ffcbe078f00 R14: 00007ffcbe078f30 R15: 00007ffcbe079290 [ 24.121887] [ 24.122178] [ 24.122392] Allocated by task 212: [ 24.122819] kasan_save_stack+0x22/0x50 [ 24.123325] kasan_set_track+0x25/0x30 [ 24.123825] __kasan_slab_alloc+0x59/0x70 [ 24.124345] kmem_cache_alloc+0x16b/0x370 [ 24.124858] vm_area_dup+0x20/0x160 [ 24.125308] __split_vma+0x170/0x950 [ 24.125774] split_vma+0xc6/0x110 [ 24.126209] mprotect_fixup+0x8d2/0xb30 [ 24.126710] do_mprotect_pkey+0x87e/0xd40 [ 24.127224] __x64_sys_mprotect+0x78/0xc0 [ 24.127762] do_syscall_64+0x3f/0x90 [ 24.128230] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.128864] [ 24.129081] Freed by task 212: [ 24.129472] kasan_save_stack+0x22/0x50 [ 24.129969] kasan_set_track+0x25/0x30 [ 24.130459] kasan_save_free_info+0x2b/0x50 [ 24.130988] __kasan_slab_free+0x10a/0x190 [ 24.131517] kmem_cache_free+0x10d/0x4d0 [ 24.132033] rcu_core+0x8c8/0x2860 [ 24.132478] __do_softirq+0x1b7/0x7d4 [ 24.132953] [ 24.133169] Last potentially related work creation: [ 24.133749] kasan_save_stack+0x22/0x50 [ 24.134248] __kasan_record_aux_stack+0x8e/0xa0 [ 24.134814] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.135454] remove_vma+0x139/0x170 [ 24.135909] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.136471] do_vmi_munmap+0x1f1/0x2b0 [ 24.136955] __vm_munmap+0x138/0x3a0 [ 24.137431] __x64_sys_munmap+0x59/0x80 [ 24.137926] do_syscall_64+0x3f/0x90 [ 24.138394] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.139049] [ 24.139263] Second to last potentially related work creation: [ 24.139959] kasan_save_stack+0x22/0x50 [ 24.140489] __kasan_record_aux_stack+0x8e/0xa0 [ 24.141094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.141789] remove_vma+0x139/0x170 [ 24.142245] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.142802] do_vmi_munmap+0x1f1/0x2b0 [ 24.143290] __vm_munmap+0x138/0x3a0 [ 24.143776] __x64_sys_munmap+0x59/0x80 [ 24.144265] do_syscall_64+0x3f/0x90 [ 24.144732] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.145379] [ 24.145594] The buggy address belongs to the object at ffff88800dccb570 [ 24.145594] which belongs to the cache vm_area_struct of size 168 [ 24.147160] The buggy address is located 88 bytes inside of [ 24.147160] freed 168-byte region [ffff88800dccb570, ffff88800dccb618) [ 24.148649] [ 24.148879] The buggy address belongs to the physical page: [ 24.149577] page:000000000df08f3b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdccb [ 24.150725] memcg:ffff88800c6a4801 [ 24.151147] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.151861] page_type: 0xffffffff() [ 24.152314] raw: 0100000000000200 ffff88800879fc80 ffffea0000381600 dead000000000002 [ 24.153232] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c6a4801 [ 24.154124] page dumped because: kasan: bad access detected [ 24.154778] [ 24.154996] Memory state around the buggy address: [ 24.155587] ffff88800dccb480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.156476] ffff88800dccb500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.157328] >ffff88800dccb580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.158172] ^ [ 24.158832] ffff88800dccb600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.159716] ffff88800dccb680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.160580] ================================================================== [ 24.161582] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.505941] BUG: Bad rss-counter state mm:00000000f39894e2 type:MM_FILEPAGES val:33 [ 26.506916] BUG: Bad rss-counter state mm:00000000f39894e2 type:MM_ANONPAGES val:22 [ 26.997149] BUG: Bad rss-counter state mm:0000000084576e31 type:MM_FILEPAGES val:33 [ 26.998523] BUG: Bad rss-counter state mm:0000000084576e31 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13174' (ECDSA) to the list of known hosts. 2023/06/19 18:00:18 fuzzer started 2023/06/19 18:00:18 dialing manager at localhost:44161 2023/06/19 18:00:18 checking machine... 2023/06/19 18:00:18 checking revisions... [ 27.755237] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:00:18 testing simple program... [ 27.808229] cgroup: Unknown subsys name 'net' [ 27.861349] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:00:17 Registers: info registers vcpu 0 RAX=0000000000000010 RBX=0000000000000002 RCX=ffffffff8180f43a RDX=0000000000000010 RSI=ffffffff86137dcc RDI=ffffffff85dfcfd4 RBP=ffffffff85dfcfd4 RSP=ffff88806ce099e0 R8 =ffffffff86137dcc R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000020f00 R12=ffffffff85dfd010 R13=ffffffff85dfcfd4 R14=ffffffff85dfcfd4 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000283 [--S---C] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa76f1b9900 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=00007fa76e5b2290 CR3=000000000c5d2000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c648ace80c3e803c00000000000ae988 XMM05=9dc04c7391f9dd9c0000000000135a18 XMM06=806171799158d9670000000000134498 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888019050001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801904fd01 RSI=ffff88801904fd20 RDI=ffff88801904f9e8 RBP=ffff88801904fa30 RSP=ffff88801904f960 R8 =ffffffff8613751e R9 =ffff88801904fa18 R10=0000000000038001 R11=0000000000020d8a R12=ffff88801904fa38 R13=ffff88801904fa20 R14=ffff88801904fd28 R15=ffff88801904f9d8 RIP=ffffffff811304d5 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f325d2ff900 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=00007ffd57cc9ff8 CR3=0000000009492000 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=23232323232323232323232323232323 XMM01=00000053000002a03b031b01003d0920 XMM02=0000000000ffff000000000000000000 XMM03=20202020202020205249445f4c49414d XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=612064646100006c69616d2f7261762f XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000