[ 24.101815] BUG: Bad rss-counter state mm:0000000076a88038 type:MM_FILEPAGES val:33 [ 24.103105] BUG: Bad rss-counter state mm:0000000076a88038 type:MM_ANONPAGES val:22 [ 24.276728] ================================================================== [ 24.277845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.278938] Read of size 8 at addr ffff888019e07b38 by task sshd/220 [ 24.279716] [ 24.279933] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.280790] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.281799] Call Trace: [ 24.282126] [ 24.282408] dump_stack_lvl+0x91/0xf0 [ 24.282899] print_report+0xcc/0x620 [ 24.283383] ? __virt_addr_valid+0x102/0x340 [ 24.283938] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.284553] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.285177] kasan_report+0xbe/0xf0 [ 24.285667] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.286290] vma_interval_tree_remove+0xc75/0xec0 [ 24.286885] vma_prepare+0xc54/0x11a0 [ 24.287363] __split_vma+0x5af/0x950 [ 24.287832] ? __pfx___split_vma+0x10/0x10 [ 24.288372] ? find_held_lock+0x2c/0x110 [ 24.288886] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.289475] ? lock_is_held_type+0x9f/0x120 [ 24.290016] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.290624] ? mtree_range_walk+0x632/0x900 [ 24.291168] ? mas_walk+0x5c7/0x7c0 [ 24.291645] do_vmi_munmap+0x1f1/0x2b0 [ 24.292139] mmap_region+0x1f9/0x2660 [ 24.292617] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.293122] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.293837] ? __pfx_lock_acquire+0x10/0x10 [ 24.294368] ? __pfx_mmap_region+0x10/0x10 [ 24.294893] ? security_mmap_addr+0x7d/0xa0 [ 24.295421] ? get_unmapped_area+0x1f5/0x3f0 [ 24.295964] do_mmap+0x854/0xf00 [ 24.296415] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.296905] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.297499] ksys_mmap_pgoff+0x3af/0x500 [ 24.298016] do_syscall_64+0x3f/0x90 [ 24.298501] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.299146] RIP: 0033:0x7f1029f6ad82 [ 24.299596] 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 [ 24.301726] RSP: 002b:00007ffd551dd018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.302629] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1029f6ad82 [ 24.303472] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10293a4000 [ 24.304314] RBP: 00007f10293a4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.305153] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558facd70d90 [ 24.306010] R13: 00007ffd551dd030 R14: 00007ffd551dd060 R15: 00007ffd551dd3c0 [ 24.306855] [ 24.307146] [ 24.307369] Allocated by task 211: [ 24.307793] kasan_save_stack+0x22/0x50 [ 24.308300] kasan_set_track+0x25/0x30 [ 24.308789] __kasan_slab_alloc+0x59/0x70 [ 24.309316] kmem_cache_alloc+0x16b/0x370 [ 24.309843] vm_area_dup+0x20/0x160 [ 24.310299] __split_vma+0x170/0x950 [ 24.310773] split_vma+0xc6/0x110 [ 24.311217] mprotect_fixup+0x8d2/0xb30 [ 24.311721] do_mprotect_pkey+0x87e/0xd40 [ 24.312240] __x64_sys_mprotect+0x78/0xc0 [ 24.312770] do_syscall_64+0x3f/0x90 [ 24.313241] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.313897] [ 24.314109] Freed by task 211: [ 24.314503] kasan_save_stack+0x22/0x50 [ 24.315004] kasan_set_track+0x25/0x30 [ 24.315495] kasan_save_free_info+0x2b/0x50 [ 24.316021] __kasan_slab_free+0x10a/0x190 [ 24.316564] kmem_cache_free+0x10d/0x4d0 [ 24.317065] rcu_core+0x8c8/0x2860 [ 24.317520] __do_softirq+0x1b7/0x7d4 [ 24.317994] [ 24.318216] Last potentially related work creation: [ 24.318794] kasan_save_stack+0x22/0x50 [ 24.319304] __kasan_record_aux_stack+0x8e/0xa0 [ 24.319877] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.320525] remove_vma+0x139/0x170 [ 24.320975] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.321549] do_vmi_munmap+0x1f1/0x2b0 [ 24.322044] __vm_munmap+0x138/0x3a0 [ 24.322509] __x64_sys_munmap+0x59/0x80 [ 24.323003] do_syscall_64+0x3f/0x90 [ 24.323482] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.324139] [ 24.324360] The buggy address belongs to the object at ffff888019e07ae0 [ 24.324360] which belongs to the cache vm_area_struct of size 168 [ 24.325871] The buggy address is located 88 bytes inside of [ 24.325871] freed 168-byte region [ffff888019e07ae0, ffff888019e07b88) [ 24.327279] [ 24.327499] The buggy address belongs to the physical page: [ 24.328160] page:00000000923bb453 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e07 [ 24.329252] memcg:ffff88800d1ca401 [ 24.329697] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.330346] page_type: 0xffffffff() [ 24.330802] raw: 0100000000000200 ffff8880087a0c80 ffffea000056de40 dead000000000008 [ 24.331729] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d1ca401 [ 24.332635] page dumped because: kasan: bad access detected [ 24.333295] [ 24.333528] Memory state around the buggy address: [ 24.334111] ffff888019e07a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.334964] ffff888019e07a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 24.335814] >ffff888019e07b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.336666] ^ [ 24.337280] ffff888019e07b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 24.338146] ffff888019e07c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 24.338998] ================================================================== [ 24.340057] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.099456] BUG: Bad rss-counter state mm:00000000f8e447fc type:MM_FILEPAGES val:33 [ 27.100642] BUG: Bad rss-counter state mm:00000000f8e447fc type:MM_ANONPAGES val:22 [ 27.586452] BUG: Bad rss-counter state mm:00000000ef2280c2 type:MM_FILEPAGES val:33 [ 27.587881] BUG: Bad rss-counter state mm:00000000ef2280c2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:13049' (ECDSA) to the list of known hosts. 2023/06/20 23:03:10 fuzzer started 2023/06/20 23:03:10 dialing manager at localhost:36067 2023/06/20 23:03:10 checking machine... 2023/06/20 23:03:10 checking revisions... [ 28.369118] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:03:10 testing simple program... [ 28.421114] cgroup: Unknown subsys name 'net' [ 28.460785] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:03:09 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=0000000000000001 RCX=ffffffff818ea579 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=0000000000000003 RSP=ffff88801680fde0 R8 =0000000000000000 R9 =ffffed100344a348 R10=ffff88801a251a43 R11=0000000000000000 R12=ffff88801a251a40 R13=0000000000004000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c0408 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 00007f347de9a900 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=00007f347e44f650 CR3=000000001936a000 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=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 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=00007ff194ca48a0 CR3=000000000caaa000 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=52a5d61265e43bb404474c64fc852af1 XMM02=000000000011a138eff9b2d0a8fce9cb XMM03=000000000011a2082c67c8bc2e329bc3 XMM04=bf1f2947a5d7fa9c00000000000ae988 XMM05=19e9129bd510f2350000000000130e08 XMM06=3bd00c02e8a53c90000000000012f878 XMM07=e042d86d42eb936e00000000001212a0 XMM08=5f97362e8366c8af000000000011a208 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000