[ 26.952995] BUG: Bad rss-counter state mm:00000000ef28c063 type:MM_FILEPAGES val:33 [ 26.954280] BUG: Bad rss-counter state mm:00000000ef28c063 type:MM_ANONPAGES val:22 [ 26.992601] ================================================================== [ 26.993671] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.994643] Read of size 8 at addr ffff88801b8466b0 by task sshd/218 [ 26.995432] [ 26.995654] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.996543] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.997549] Call Trace: [ 26.997876] <TASK> [ 26.998165] dump_stack_lvl+0x91/0xf0 [ 26.998671] print_report+0xcc/0x620 [ 26.999168] ? __virt_addr_valid+0x102/0x340 [ 26.999741] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.000372] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.001004] kasan_report+0xbe/0xf0 [ 27.001512] ? vma_interval_tree_remove+0xc75/0xec0 [ 27.002148] vma_interval_tree_remove+0xc75/0xec0 [ 27.002771] vma_prepare+0xc54/0x11a0 [ 27.003263] __split_vma+0x5af/0x950 [ 27.003751] ? __pfx___split_vma+0x10/0x10 [ 27.004299] ? find_held_lock+0x2c/0x110 [ 27.004844] do_vmi_align_munmap+0x2ba/0x11f0 [ 27.005443] ? lock_is_held_type+0x9f/0x120 [ 27.005997] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 27.006614] ? mtree_range_walk+0x632/0x900 [ 27.007186] ? mas_walk+0x5c7/0x7c0 [ 27.007670] do_vmi_munmap+0x1f1/0x2b0 [ 27.008178] mmap_region+0x1f9/0x2660 [ 27.008673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 27.009201] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 27.009949] ? __pfx_lock_acquire+0x10/0x10 [ 27.010511] ? __pfx_mmap_region+0x10/0x10 [ 27.011060] ? security_mmap_addr+0x7d/0xa0 [ 27.011611] ? get_unmapped_area+0x1f5/0x3f0 [ 27.012178] do_mmap+0x854/0xf00 [ 27.012635] vm_mmap_pgoff+0x1a6/0x3a0 [ 27.013146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 27.013746] ksys_mmap_pgoff+0x3af/0x500 [ 27.014275] do_syscall_64+0x3f/0x90 [ 27.014768] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.015428] RIP: 0033:0x7f7807e99d82 [ 27.015896] 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 [ 27.018098] RSP: 002b:00007ffd714685d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 27.019029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7807e99d82 [ 27.020052] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f78072d3000 [ 27.020934] RBP: 00007f78072d3000 R08: 0000000000000009 R09: 0000000000001000 [ 27.021847] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f6ffe0ec0 [ 27.022723] R13: 00007ffd714685f0 R14: 00007ffd71468620 R15: 00007ffd71468980 [ 27.023600] </TASK> [ 27.023906] [ 27.024130] Allocated by task 207: [ 27.024572] kasan_save_stack+0x22/0x50 [ 27.025091] kasan_set_track+0x25/0x30 [ 27.025619] __kasan_slab_alloc+0x59/0x70 [ 27.026163] kmem_cache_alloc+0x16b/0x370 [ 27.026700] vm_area_dup+0x20/0x160 [ 27.027169] __split_vma+0x170/0x950 [ 27.027651] split_vma+0xc6/0x110 [ 27.028103] mprotect_fixup+0x8d2/0xb30 [ 27.028622] do_mprotect_pkey+0x87e/0xd40 [ 27.029161] __x64_sys_mprotect+0x78/0xc0 [ 27.029742] do_syscall_64+0x3f/0x90 [ 27.030233] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.030870] [ 27.031085] Freed by task 207: [ 27.031478] kasan_save_stack+0x22/0x50 [ 27.031986] kasan_set_track+0x25/0x30 [ 27.032494] kasan_save_free_info+0x2b/0x50 [ 27.033030] __kasan_slab_free+0x10a/0x190 [ 27.033577] kmem_cache_free+0x10d/0x4d0 [ 27.034094] rcu_core+0x8c8/0x2860 [ 27.034538] __do_softirq+0x1b7/0x7d4 [ 27.035034] [ 27.035247] Last potentially related work creation: [ 27.035867] kasan_save_stack+0x22/0x50 [ 27.036382] __kasan_record_aux_stack+0x8e/0xa0 [ 27.036977] __call_rcu_common.constprop.0+0x6a/0xb90 [ 27.037638] remove_vma+0x139/0x170 [ 27.038099] do_vmi_align_munmap+0xd4a/0x11f0 [ 27.038678] do_vmi_munmap+0x1f1/0x2b0 [ 27.039173] __vm_munmap+0x138/0x3a0 [ 27.039653] __x64_sys_munmap+0x59/0x80 [ 27.040165] do_syscall_64+0x3f/0x90 [ 27.040651] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 27.041306] [ 27.041547] The buggy address belongs to the object at ffff88801b846658 [ 27.041547] which belongs to the cache vm_area_struct of size 168 [ 27.043058] The buggy address is located 88 bytes inside of [ 27.043058] freed 168-byte region [ffff88801b846658, ffff88801b846700) [ 27.044499] [ 27.044725] The buggy address belongs to the physical page: [ 27.045403] page:00000000af4a1cb7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b846 [ 27.046531] memcg:ffff88801a37c501 [ 27.046967] flags: 0x100000000000200(slab|node=0|zone=1) [ 27.047620] page_type: 0xffffffff() [ 27.048078] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 27.049005] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a37c501 [ 27.049950] page dumped because: kasan: bad access detected [ 27.050626] [ 27.050848] Memory state around the buggy address: [ 27.051443] ffff88801b846580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 27.052313] ffff88801b846600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 27.053187] >ffff88801b846680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 27.054062] ^ [ 27.054651] ffff88801b846700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 27.055530] ffff88801b846780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 27.056406] ================================================================== [ 27.057574] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 29.028892] BUG: Bad rss-counter state mm:000000002758ba37 type:MM_FILEPAGES val:33 [ 29.030121] BUG: Bad rss-counter state mm:000000002758ba37 type:MM_ANONPAGES val:22 [ 29.567860] BUG: Bad rss-counter state mm:0000000021fc57f6 type:MM_FILEPAGES val:33 [ 29.568906] BUG: Bad rss-counter state mm:0000000021fc57f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43242' (ECDSA) to the list of known hosts. 2023/06/19 10:56:48 fuzzer started 2023/06/19 10:56:49 dialing manager at localhost:44161 2023/06/19 10:56:49 checking machine... 2023/06/19 10:56:49 checking revisions... [ 30.307160] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:56:49 testing simple program... [ 30.357701] cgroup: Unknown subsys name 'net' [ 30.394295] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:45 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff83c1ec28 RCX=0000000000000001 RDX=1ffff1100d9c135e RSI=ffff8880147678e8 RDI=ffffffff83c1ec28 RBP=ffff88806ce09af0 RSP=ffff88806ce09a68 R8 =0000000000000001 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000024815 R12=ffff88806ce09b60 R13=0000000000000000 R14=ffff888015b89b40 R15=ffff88800c344540 RIP=ffffffff811fc7a0 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 00007f5e988bc900 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=00007f5e97ce6800 CR3=0000000008db2000 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=d805715c053b410400000000000ae988 XMM05=3eb9b94a6d71f83e0000000000133c30 XMM06=add65b260049eeae0000000000132660 XMM07=fb795ef6d65770560000000000120418 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000003 RBX=ffffffff85dfca08 RCX=ffffffff8180c521 RDX=0000000000000007 RSI=ffffffff86137508 RDI=ffffffff85dfc9fc RBP=ffffffff85dfc9fc RSP=ffff888008e578c0 R8 =ffffffff86137508 R9 =ffff888008e579b8 R10=0000000000038001 R11=0000000000020d8a R12=ffffffff85dfca18 R13=ffffffff85dfc9fc R14=ffffffff85dfc9fc R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000217 [----APC] 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=00007ffdc7aed000 CR3=00000000098c4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000