[ 23.954396] BUG: Bad rss-counter state mm:0000000090766c61 type:MM_FILEPAGES val:33 [ 23.956266] BUG: Bad rss-counter state mm:0000000090766c61 type:MM_ANONPAGES val:22 [ 24.141901] ================================================================== [ 24.142951] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.144029] Read of size 8 at addr ffff888016551a50 by task sshd/220 [ 24.145038] [ 24.145288] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.146281] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.147430] Call Trace: [ 24.147796] [ 24.148122] dump_stack_lvl+0x91/0xf0 [ 24.148686] print_report+0xcc/0x620 [ 24.149256] ? __virt_addr_valid+0x102/0x340 [ 24.149874] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.150553] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.151236] kasan_report+0xbe/0xf0 [ 24.151764] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.152454] vma_interval_tree_remove+0xc75/0xec0 [ 24.153144] vma_prepare+0xc54/0x11a0 [ 24.153679] __split_vma+0x5af/0x950 [ 24.154201] ? __pfx___split_vma+0x10/0x10 [ 24.154790] ? find_held_lock+0x2c/0x110 [ 24.155369] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.156002] ? lock_is_held_type+0x9f/0x120 [ 24.156598] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.157321] ? mtree_range_walk+0x632/0x900 [ 24.157964] ? mas_walk+0x5c7/0x7c0 [ 24.158514] do_vmi_munmap+0x1f1/0x2b0 [ 24.159077] mmap_region+0x1f9/0x2660 [ 24.159628] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.160214] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.161056] ? __pfx_lock_acquire+0x10/0x10 [ 24.161673] ? __pfx_mmap_region+0x10/0x10 [ 24.162298] ? security_mmap_addr+0x7d/0xa0 [ 24.162915] ? get_unmapped_area+0x1f5/0x3f0 [ 24.163549] do_mmap+0x854/0xf00 [ 24.164054] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.164627] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.165294] ksys_mmap_pgoff+0x3af/0x500 [ 24.165881] do_syscall_64+0x3f/0x90 [ 24.166433] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.167182] RIP: 0033:0x7fe24b3a2d82 [ 24.167716] 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 [ 24.170180] RSP: 002b:00007ffd190e5028 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.171224] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe24b3a2d82 [ 24.172194] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe24a7dc000 [ 24.173184] RBP: 00007fe24a7dc000 R08: 0000000000000009 R09: 0000000000001000 [ 24.174161] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558847b7ab20 [ 24.175131] R13: 00007ffd190e5040 R14: 00007ffd190e5070 R15: 00007ffd190e53d0 [ 24.176115] [ 24.176456] [ 24.176704] Allocated by task 209: [ 24.177208] kasan_save_stack+0x22/0x50 [ 24.177781] kasan_set_track+0x25/0x30 [ 24.178358] __kasan_slab_alloc+0x59/0x70 [ 24.178955] kmem_cache_alloc+0x16b/0x370 [ 24.179552] vm_area_dup+0x20/0x160 [ 24.180072] __split_vma+0x170/0x950 [ 24.180607] split_vma+0xc6/0x110 [ 24.181129] mprotect_fixup+0x8d2/0xb30 [ 24.181707] do_mprotect_pkey+0x87e/0xd40 [ 24.182303] __x64_sys_mprotect+0x78/0xc0 [ 24.182898] do_syscall_64+0x3f/0x90 [ 24.183445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.184181] [ 24.184428] Freed by task 209: [ 24.184887] kasan_save_stack+0x22/0x50 [ 24.185464] kasan_set_track+0x25/0x30 [ 24.186031] kasan_save_free_info+0x2b/0x50 [ 24.186641] __kasan_slab_free+0x10a/0x190 [ 24.187248] kmem_cache_free+0x10d/0x4d0 [ 24.187827] rcu_core+0x8c8/0x2860 [ 24.188335] __do_softirq+0x1b7/0x7d4 [ 24.188898] [ 24.189144] Last potentially related work creation: [ 24.189813] kasan_save_stack+0x22/0x50 [ 24.190389] __kasan_record_aux_stack+0x8e/0xa0 [ 24.191047] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.191783] remove_vma+0x139/0x170 [ 24.192300] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.192955] do_vmi_munmap+0x1f1/0x2b0 [ 24.193516] __vm_munmap+0x138/0x3a0 [ 24.194049] __x64_sys_munmap+0x59/0x80 [ 24.194618] do_syscall_64+0x3f/0x90 [ 24.195161] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.195901] [ 24.196149] The buggy address belongs to the object at ffff8880165519f8 [ 24.196149] which belongs to the cache vm_area_struct of size 168 [ 24.197844] The buggy address is located 88 bytes inside of [ 24.197844] freed 168-byte region [ffff8880165519f8, ffff888016551aa0) [ 24.199449] [ 24.199694] The buggy address belongs to the physical page: [ 24.200450] page:000000008e0340f7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16551 [ 24.201715] memcg:ffff88800d66c701 [ 24.202207] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.202918] page_type: 0xffffffff() [ 24.203428] raw: 0100000000000200 ffff8880087a0c80 ffffea0000652d40 0000000000000008 [ 24.204447] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d66c701 [ 24.205478] page dumped because: kasan: bad access detected [ 24.206210] [ 24.206450] Memory state around the buggy address: [ 24.207088] ffff888016551900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.208034] ffff888016551980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 24.208988] >ffff888016551a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.209922] ^ [ 24.210712] ffff888016551a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 24.211683] ffff888016551b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.212651] ================================================================== [ 24.213811] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.084202] BUG: Bad rss-counter state mm:000000000d0f56d9 type:MM_FILEPAGES val:33 [ 26.085385] BUG: Bad rss-counter state mm:000000000d0f56d9 type:MM_ANONPAGES val:22 [ 26.629623] BUG: Bad rss-counter state mm:0000000024dc511f type:MM_FILEPAGES val:33 [ 26.631033] BUG: Bad rss-counter state mm:0000000024dc511f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64817' (ECDSA) to the list of known hosts. 2023/06/20 17:47:28 fuzzer started 2023/06/20 17:47:28 dialing manager at localhost:36067 2023/06/20 17:47:28 checking machine... 2023/06/20 17:47:28 checking revisions... [ 27.265534] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:47:28 testing simple program... [ 27.310433] cgroup: Unknown subsys name 'net' [ 27.350284] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:47:28 Registers: info registers vcpu 0 RAX=ffffffff8614caff RBX=0000000000000001 RCX=ffffffff8614cafa RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018ec7988 RSP=ffff888018ec78c0 R8 =ffffffff8614cafe R9 =ffff888018ec7970 R10=0000000000038001 R11=0000000000024253 R12=ffff888018ec7990 R13=ffff888018ec7978 R14=ffff888018ec7971 R15=ffff888018ec7930 RIP=ffffffff81130abf 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 00007f36f04f2900 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=00007ffe98629000 CR3=0000000014606000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000626936e40 RCX=ffffffff813beabb RDX=0000000000000002 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000002 RSP=ffff88806cf09ea8 R8 =0000000000000006 R9 =0000000626936e40 R10=7fffffffffffffff R11=ffff88806cf09ff8 R12=ffff88806cf2c250 R13=0000000000000000 R14=dffffc0000000000 R15=0000000000000000 RIP=ffffffff814c03a8 RFL=00000046 [---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=00007fccd3caa000 CR3=000000000d914000 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=1e6e6d6dcb39aab4f6445d2e13696eca XMM02=000000000011a0e0ec2efd57dc4c00df XMM03=0000000000120f306afed05266e1c758 XMM04=17b0493d09ccbb6900000000000ae988 XMM05=8407cdee968682910000000000131c00 XMM06=4fda316b135da52b0000000000130930 XMM07=e042d86d42eb936e0000000000121208 XMM08=6afed05266e1c758000000000011a140 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000