[ 24.868058] BUG: Bad rss-counter state mm:000000008f4a37d9 type:MM_FILEPAGES val:33 [ 24.869017] BUG: Bad rss-counter state mm:000000008f4a37d9 type:MM_ANONPAGES val:22 [ 25.035442] ================================================================== [ 25.036569] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.037712] Read of size 8 at addr ffff88801a3cf5c8 by task sshd/220 [ 25.038850] [ 25.039075] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.039964] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.041002] Call Trace: [ 25.041340] [ 25.041636] dump_stack_lvl+0x91/0xf0 [ 25.042156] print_report+0xcc/0x620 [ 25.042658] ? __virt_addr_valid+0x102/0x340 [ 25.043232] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.043882] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.044521] kasan_report+0xbe/0xf0 [ 25.045014] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.045682] vma_interval_tree_remove+0xc75/0xec0 [ 25.046330] vma_prepare+0xc54/0x11a0 [ 25.046836] __split_vma+0x5af/0x950 [ 25.047331] ? __pfx___split_vma+0x10/0x10 [ 25.047879] ? find_held_lock+0x2c/0x110 [ 25.048421] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.049003] ? lock_is_held_type+0x9f/0x120 [ 25.049561] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.050217] ? mtree_range_walk+0x632/0x900 [ 25.050800] ? mas_walk+0x5c7/0x7c0 [ 25.051290] do_vmi_munmap+0x1f1/0x2b0 [ 25.051798] mmap_region+0x1f9/0x2660 [ 25.052299] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.052835] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.053587] ? __pfx_lock_acquire+0x10/0x10 [ 25.054165] ? __pfx_mmap_region+0x10/0x10 [ 25.054722] ? security_mmap_addr+0x7d/0xa0 [ 25.055283] ? get_unmapped_area+0x1f5/0x3f0 [ 25.055860] do_mmap+0x854/0xf00 [ 25.056319] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.056838] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.057424] ksys_mmap_pgoff+0x3af/0x500 [ 25.057950] do_syscall_64+0x3f/0x90 [ 25.058464] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.059138] RIP: 0033:0x7f140bc00d82 [ 25.059618] 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 [ 25.061853] RSP: 002b:00007ffff9b6d398 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.062821] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f140bc00d82 [ 25.063713] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f140b03a000 [ 25.064608] RBP: 00007f140b03a000 R08: 0000000000000009 R09: 0000000000001000 [ 25.065504] R10: 0000000000000812 R11: 0000000000000206 R12: 00005609f1a8ad90 [ 25.066406] R13: 00007ffff9b6d3b0 R14: 00007ffff9b6d3e0 R15: 00007ffff9b6d740 [ 25.067316] [ 25.067622] [ 25.067842] Allocated by task 208: [ 25.068288] kasan_save_stack+0x22/0x50 [ 25.068812] kasan_set_track+0x25/0x30 [ 25.069330] __kasan_slab_alloc+0x59/0x70 [ 25.069877] kmem_cache_alloc+0x16b/0x370 [ 25.070423] vm_area_dup+0x20/0x160 [ 25.070902] __split_vma+0x170/0x950 [ 25.071395] split_vma+0xc6/0x110 [ 25.071855] mprotect_fixup+0x8d2/0xb30 [ 25.072382] do_mprotect_pkey+0x87e/0xd40 [ 25.072932] __x64_sys_mprotect+0x78/0xc0 [ 25.073479] do_syscall_64+0x3f/0x90 [ 25.073972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.074675] [ 25.074894] Freed by task 203: [ 25.075301] kasan_save_stack+0x22/0x50 [ 25.075828] kasan_set_track+0x25/0x30 [ 25.076343] kasan_save_free_info+0x2b/0x50 [ 25.076901] __kasan_slab_free+0x10a/0x190 [ 25.077455] kmem_cache_free+0x10d/0x4d0 [ 25.077987] rcu_core+0x8c8/0x2860 [ 25.078465] __do_softirq+0x1b7/0x7d4 [ 25.078966] [ 25.079256] Last potentially related work creation: [ 25.079867] kasan_save_stack+0x22/0x50 [ 25.080395] __kasan_record_aux_stack+0x8e/0xa0 [ 25.080984] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.081649] remove_vma+0x139/0x170 [ 25.082140] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.082725] do_vmi_munmap+0x1f1/0x2b0 [ 25.083234] __vm_munmap+0x138/0x3a0 [ 25.083727] __x64_sys_munmap+0x59/0x80 [ 25.084252] do_syscall_64+0x3f/0x90 [ 25.084747] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.085414] [ 25.085639] The buggy address belongs to the object at ffff88801a3cf570 [ 25.085639] which belongs to the cache vm_area_struct of size 168 [ 25.087181] The buggy address is located 88 bytes inside of [ 25.087181] freed 168-byte region [ffff88801a3cf570, ffff88801a3cf618) [ 25.088664] [ 25.088896] The buggy address belongs to the physical page: [ 25.089597] page:00000000d042d259 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3cf [ 25.090746] memcg:ffff88801a3d0001 [ 25.091194] flags: 0x100000000000200(slab|node=0|zone=1) [ 25.091874] page_type: 0xffffffff() [ 25.092355] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 25.093315] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a3d0001 [ 25.094283] page dumped because: kasan: bad access detected [ 25.094987] [ 25.095209] Memory state around the buggy address: [ 25.095818] ffff88801a3cf480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.096702] ffff88801a3cf500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 25.097596] >ffff88801a3cf580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.098496] ^ [ 25.099197] ffff88801a3cf600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 25.100101] ffff88801a3cf680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.100995] ================================================================== [ 25.101964] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.445531] BUG: Bad rss-counter state mm:00000000bdedaa75 type:MM_FILEPAGES val:33 [ 27.446263] BUG: Bad rss-counter state mm:00000000bdedaa75 type:MM_ANONPAGES val:22 [ 27.999738] BUG: Bad rss-counter state mm:0000000056d7ff13 type:MM_FILEPAGES val:33 [ 28.000931] BUG: Bad rss-counter state mm:0000000056d7ff13 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40366' (ECDSA) to the list of known hosts. 2023/06/19 13:00:18 fuzzer started 2023/06/19 13:00:19 dialing manager at localhost:44161 2023/06/19 13:00:19 checking machine... 2023/06/19 13:00:19 checking revisions... [ 28.649206] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:00:19 testing simple program... [ 28.711878] cgroup: Unknown subsys name 'net' [ 28.773414] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:00:17 Registers: info registers vcpu 0 RAX=1ffffffff0c969e7 RBX=0000000000000001 RCX=ffffffff864b4f38 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffffffff864b4f3a RBP=ffff888008d7f9b0 RSP=ffff888008d7f8e8 R8 =ffffffff864b4f3c R9 =ffff888008d7f998 R10=0000000000038001 R11=00000000000b5c92 R12=ffff888008d7f9b8 R13=ffff888008d7f9a0 R14=ffff888008d7fec8 R15=ffff888008d7f958 RIP=ffffffff811311c7 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 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=0000562beb66c798 CR3=000000000ccb0000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000020f00 RBX=0000000000000001 RCX=ffffffff8180f43a RDX=0000000000020f0f RSI=00000000000080f4 RDI=ffffffff86507f94 RBP=ffff88800d87fa40 RSP=ffff88800d87f978 R8 =0000000000000000 R9 =ffff88800d87fa28 R10=0000000000038001 R11=0000000000020f00 R12=ffff88800d87fa48 R13=ffff88800d87fa30 R14=ffff88800d87fa29 R15=ffff88800d87f9e8 RIP=ffffffff81130837 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 00007f6ae847d900 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=00007f6ae787ecc0 CR3=0000000008de8000 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=2038313a30303a3331203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a30303a3331203931 XMM08=00007fc9300025000000006400000080 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000