[ 23.769747] BUG: Bad rss-counter state mm:000000003be5e6ce type:MM_FILEPAGES val:32 [ 23.770298] BUG: Bad rss-counter state mm:000000003be5e6ce type:MM_ANONPAGES val:22 [ 23.918053] ================================================================== [ 23.918766] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.919485] Read of size 8 at addr ffff888019f3a228 by task sshd/218 [ 23.920078] [ 23.920246] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.920968] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.921714] Call Trace: [ 23.921960] [ 23.922178] dump_stack_lvl+0x91/0xf0 [ 23.922558] print_report+0xcc/0x620 [ 23.922930] ? __virt_addr_valid+0x102/0x340 [ 23.923374] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.923843] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.924314] kasan_report+0xbe/0xf0 [ 23.924674] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.925013] vma_interval_tree_remove+0xc75/0xec0 [ 23.925339] vma_prepare+0xc54/0x11a0 [ 23.925607] __split_vma+0x5af/0x950 [ 23.925868] ? __pfx___split_vma+0x10/0x10 [ 23.926160] ? find_held_lock+0x2c/0x110 [ 23.926448] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.926758] ? lock_is_held_type+0x9f/0x120 [ 23.927053] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.927384] ? mtree_range_walk+0x632/0x900 [ 23.927700] ? mas_walk+0x5c7/0x7c0 [ 23.927959] do_vmi_munmap+0x1f1/0x2b0 [ 23.928229] mmap_region+0x1f9/0x2660 [ 23.928501] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.928803] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.929228] ? __pfx_lock_acquire+0x10/0x10 [ 23.929532] ? __pfx_mmap_region+0x10/0x10 [ 23.929839] ? security_mmap_addr+0x7d/0xa0 [ 23.930146] ? get_unmapped_area+0x1f5/0x3f0 [ 23.930465] do_mmap+0x854/0xf00 [ 23.930719] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.931003] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.931321] ksys_mmap_pgoff+0x3af/0x500 [ 23.931611] do_syscall_64+0x3f/0x90 [ 23.931895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.932280] RIP: 0033:0x7fba0d1f6d82 [ 23.932553] 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 [ 23.933810] RSP: 002b:00007fffc61fd298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.934348] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fba0d1f6d82 [ 23.934843] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fba0c630000 [ 23.935347] RBP: 00007fba0c630000 R08: 0000000000000009 R09: 0000000000001000 [ 23.935848] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558daccd9b20 [ 23.936344] R13: 00007fffc61fd2b0 R14: 00007fffc61fd2e0 R15: 00007fffc61fd640 [ 23.936863] [ 23.937030] [ 23.937153] Allocated by task 205: [ 23.937405] kasan_save_stack+0x22/0x50 [ 23.937695] kasan_set_track+0x25/0x30 [ 23.937977] __kasan_slab_alloc+0x59/0x70 [ 23.938272] kmem_cache_alloc+0x16b/0x370 [ 23.938572] vm_area_dup+0x20/0x160 [ 23.938841] __split_vma+0x170/0x950 [ 23.939113] split_vma+0xc6/0x110 [ 23.939367] mprotect_fixup+0x8d2/0xb30 [ 23.939653] do_mprotect_pkey+0x87e/0xd40 [ 23.939961] __x64_sys_mprotect+0x78/0xc0 [ 23.940268] do_syscall_64+0x3f/0x90 [ 23.940550] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.940928] [ 23.941050] Freed by task 207: [ 23.941277] kasan_save_stack+0x22/0x50 [ 23.941564] kasan_set_track+0x25/0x30 [ 23.941849] kasan_save_free_info+0x2b/0x50 [ 23.942156] __kasan_slab_free+0x10a/0x190 [ 23.942466] kmem_cache_free+0x10d/0x4d0 [ 23.942763] rcu_core+0x8c8/0x2860 [ 23.943022] __do_softirq+0x1b7/0x7d4 [ 23.943298] [ 23.943418] Last potentially related work creation: [ 23.943766] kasan_save_stack+0x22/0x50 [ 23.944055] __kasan_record_aux_stack+0x8e/0xa0 [ 23.944401] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.944785] remove_vma+0x139/0x170 [ 23.945044] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.945360] do_vmi_munmap+0x1f1/0x2b0 [ 23.945646] __vm_munmap+0x138/0x3a0 [ 23.945923] __x64_sys_munmap+0x59/0x80 [ 23.946217] do_syscall_64+0x3f/0x90 [ 23.946492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.946867] [ 23.946991] The buggy address belongs to the object at ffff888019f3a1d0 [ 23.946991] which belongs to the cache vm_area_struct of size 168 [ 23.947867] The buggy address is located 88 bytes inside of [ 23.947867] freed 168-byte region [ffff888019f3a1d0, ffff888019f3a278) [ 23.948704] [ 23.948828] The buggy address belongs to the physical page: [ 23.949217] page:000000003ac4161d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19f3a [ 23.949861] memcg:ffff888019f3b001 [ 23.950101] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.950479] page_type: 0xffffffff() [ 23.950747] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.951288] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f3b001 [ 23.951827] page dumped because: kasan: bad access detected [ 23.952218] [ 23.952345] Memory state around the buggy address: [ 23.952698] ffff888019f3a100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.953200] ffff888019f3a180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 23.953714] >ffff888019f3a200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 23.954220] ^ [ 23.954543] ffff888019f3a280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 23.955051] ffff888019f3a300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 23.955568] ================================================================== [ 23.956155] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.247401] BUG: Bad rss-counter state mm:000000009e70ae57 type:MM_FILEPAGES val:33 [ 26.248328] BUG: Bad rss-counter state mm:000000009e70ae57 type:MM_ANONPAGES val:22 [ 26.794780] BUG: Bad rss-counter state mm:00000000e1028d4d type:MM_FILEPAGES val:33 [ 26.795933] BUG: Bad rss-counter state mm:00000000e1028d4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28853' (ECDSA) to the list of known hosts. 2023/06/20 16:58:00 fuzzer started 2023/06/20 16:58:00 dialing manager at localhost:36067 2023/06/20 16:58:00 checking machine... 2023/06/20 16:58:00 checking revisions... [ 27.463263] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:58:00 testing simple program... [ 27.508116] cgroup: Unknown subsys name 'net' [ 27.557367] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:59 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00000000000f73e8 RCX=00005633dec46f26 RDX=00007ffcd912b9b8 RSI=00007ffcd912b9b8 RDI=00005633dff9e2a0 RBP=00007ffcd912ba48 RSP=00007ffcd912b9b0 R8 =0000000000000046 R9 =00000000000f73e8 R10=0000000000000002 R11=000000000052545f R12=00007f269ff5a3e8 R13=00005633dffa04c0 R14=0000000000000001 R15=00007ffcd912b9c0 RIP=00007f26a15fb475 RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f26a0a78900 00000000 00000000 GS =0000 0000000000000000 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=00007f9ff0376650 CR3=0000000008dc8000 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=00000000000000003732323d4449505f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=0706757189e70ab500000000000ae988 XMM05=a8ea8f316f9528a50000000000131e18 XMM06=bdf2e299e47b49d50000000000130898 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f RFL=00000246 [---Z-P-] CPL=0 II=0 A20=1 SMM=0 HLT=1 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=000055ba570f9290 CR3=0000000018004000 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=ffffffffffff00000000000000000000 XMM02=ffffffffffff00000000000000000000 XMM03=00000000000000000000000000777074 XMM04=00007f5e742a9c71000000725f646975 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=000000000000726f7475636578652d7a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000