[ 23.885794] BUG: Bad rss-counter state mm:0000000034984224 type:MM_FILEPAGES val:33 [ 23.887255] BUG: Bad rss-counter state mm:0000000034984224 type:MM_ANONPAGES val:22 [ 24.035096] ================================================================== [ 24.036016] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.036954] Read of size 8 at addr ffff88800e93a968 by task sshd/219 [ 24.037897] [ 24.038147] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.039012] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.040016] Call Trace: [ 24.040337] [ 24.040621] dump_stack_lvl+0x91/0xf0 [ 24.041117] print_report+0xcc/0x620 [ 24.041605] ? __virt_addr_valid+0x102/0x340 [ 24.042189] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.042822] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.043456] kasan_report+0xbe/0xf0 [ 24.043942] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.044570] vma_interval_tree_remove+0xc75/0xec0 [ 24.045173] vma_prepare+0xc54/0x11a0 [ 24.045650] __split_vma+0x5af/0x950 [ 24.046138] ? __pfx___split_vma+0x10/0x10 [ 24.046665] ? find_held_lock+0x2c/0x110 [ 24.047183] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.047745] ? lock_is_held_type+0x9f/0x120 [ 24.048281] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.048889] ? mtree_range_walk+0x632/0x900 [ 24.049436] ? mas_walk+0x5c7/0x7c0 [ 24.049918] do_vmi_munmap+0x1f1/0x2b0 [ 24.050408] mmap_region+0x1f9/0x2660 [ 24.050889] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.051401] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.052118] ? __pfx_lock_acquire+0x10/0x10 [ 24.052678] ? __pfx_mmap_region+0x10/0x10 [ 24.053210] ? security_mmap_addr+0x7d/0xa0 [ 24.053762] ? get_unmapped_area+0x1f5/0x3f0 [ 24.054327] do_mmap+0x854/0xf00 [ 24.054771] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.055271] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.055833] ksys_mmap_pgoff+0x3af/0x500 [ 24.056347] do_syscall_64+0x3f/0x90 [ 24.056835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.057481] RIP: 0033:0x7fe18e42dd82 [ 24.057951] 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 [ 24.060090] RSP: 002b:00007ffecfae2e28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.061002] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe18e42dd82 [ 24.061861] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe18d867000 [ 24.062704] RBP: 00007fe18d867000 R08: 0000000000000009 R09: 0000000000001000 [ 24.063530] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a81e098d90 [ 24.064359] R13: 00007ffecfae2e40 R14: 00007ffecfae2e70 R15: 00007ffecfae31d0 [ 24.065191] [ 24.065476] [ 24.065687] Allocated by task 212: [ 24.066118] kasan_save_stack+0x22/0x50 [ 24.066608] kasan_set_track+0x25/0x30 [ 24.067090] __kasan_slab_alloc+0x59/0x70 [ 24.067600] kmem_cache_alloc+0x16b/0x370 [ 24.068110] vm_area_dup+0x20/0x160 [ 24.068553] __split_vma+0x170/0x950 [ 24.069012] split_vma+0xc6/0x110 [ 24.069442] mprotect_fixup+0x8d2/0xb30 [ 24.069941] do_mprotect_pkey+0x87e/0xd40 [ 24.070449] __x64_sys_mprotect+0x78/0xc0 [ 24.070959] do_syscall_64+0x3f/0x90 [ 24.071424] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.072052] [ 24.072263] Freed by task 203: [ 24.072647] kasan_save_stack+0x22/0x50 [ 24.073146] kasan_set_track+0x25/0x30 [ 24.073630] kasan_save_free_info+0x2b/0x50 [ 24.074156] __kasan_slab_free+0x10a/0x190 [ 24.074676] kmem_cache_free+0x10d/0x4d0 [ 24.075171] rcu_core+0x8c8/0x2860 [ 24.075601] __do_softirq+0x1b7/0x7d4 [ 24.076066] [ 24.076278] Last potentially related work creation: [ 24.076849] kasan_save_stack+0x22/0x50 [ 24.077340] __kasan_record_aux_stack+0x8e/0xa0 [ 24.077915] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.078540] remove_vma+0x139/0x170 [ 24.078980] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.079542] do_vmi_munmap+0x1f1/0x2b0 [ 24.080018] __vm_munmap+0x138/0x3a0 [ 24.080474] __x64_sys_munmap+0x59/0x80 [ 24.080963] do_syscall_64+0x3f/0x90 [ 24.081428] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.082063] [ 24.082273] Second to last potentially related work creation: [ 24.082944] kasan_save_stack+0x22/0x50 [ 24.083434] __kasan_record_aux_stack+0x8e/0xa0 [ 24.083999] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.084622] remove_vma+0x139/0x170 [ 24.085061] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.085604] do_vmi_munmap+0x1f1/0x2b0 [ 24.086097] mmap_region+0x1f9/0x2660 [ 24.086563] do_mmap+0x854/0xf00 [ 24.086986] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.087463] ksys_mmap_pgoff+0x3af/0x500 [ 24.087951] do_syscall_64+0x3f/0x90 [ 24.088414] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.089040] [ 24.089249] The buggy address belongs to the object at ffff88800e93a910 [ 24.089249] which belongs to the cache vm_area_struct of size 168 [ 24.090692] The buggy address is located 88 bytes inside of [ 24.090692] freed 168-byte region [ffff88800e93a910, ffff88800e93a9b8) [ 24.092050] [ 24.092262] The buggy address belongs to the physical page: [ 24.092901] page:00000000691a77a2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe93a [ 24.093964] memcg:ffff88800eeb0e01 [ 24.094384] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.095078] page_type: 0xffffffff() [ 24.095522] raw: 0100000000000200 ffff88800879fc80 ffffea00003ace40 dead000000000003 [ 24.096426] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eeb0e01 [ 24.097318] page dumped because: kasan: bad access detected [ 24.097977] [ 24.098189] Memory state around the buggy address: [ 24.098772] ffff88800e93a800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 24.099613] ffff88800e93a880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 24.100462] >ffff88800e93a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.101295] ^ [ 24.102075] ffff88800e93a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 24.102929] ffff88800e93aa00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.103768] ================================================================== [ 24.104677] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.502256] BUG: Bad rss-counter state mm:00000000a3e85544 type:MM_FILEPAGES val:33 [ 26.503522] BUG: Bad rss-counter state mm:00000000a3e85544 type:MM_ANONPAGES val:22 [ 26.976671] BUG: Bad rss-counter state mm:00000000aa89597e type:MM_FILEPAGES val:33 [ 26.978053] BUG: Bad rss-counter state mm:00000000aa89597e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7330' (ECDSA) to the list of known hosts. 2023/06/19 21:40:29 fuzzer started 2023/06/19 21:40:29 dialing manager at localhost:44161 2023/06/19 21:40:29 checking machine... 2023/06/19 21:40:29 checking revisions... [ 27.719740] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:40:29 testing simple program... [ 27.759119] cgroup: Unknown subsys name 'net' [ 27.802122] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:40:29 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=ffffffff8153425b RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81810591 RSP=ffff88806ce09db8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=0000000000000001 R14=ffffffff818d9dc6 R15=ffff888017875c00 RIP=ffffffff8135b910 RFL=00000016 [----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 00007f6533a98900 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=00007f6532ee0a10 CR3=000000000a7e0000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=278a2e496b107f3100000000000ae988 XMM05=48eef8395c1598490000000000135d38 XMM06=dfcdbad4f1609c370000000000134b10 XMM07=fb795ef6d65770560000000000123c08 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88801789f2e8 RCX=0000000000000001 RDX=1ffff11002f13e5f RSI=ffff88801789f798 RDI=ffff88801789f2f8 RBP=ffff88801789f798 RSP=ffff88801789f240 R8 =0000000000000001 R9 =ffff88801789f328 R10=0000000000038001 R11=000000000001cfe6 R12=0000000000000008 R13=ffff888017898000 R14=ffff88801789f798 R15=ffff88801789f2e8 RIP=ffffffff81130468 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 00007f2d022ee700 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=00007f1b3a3cc618 CR3=000000000a760000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732039323a3034 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303739 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000