Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.241806] BUG: Bad rss-counter state mm:00000000bcbb0b1f type:MM_FILEPAGES val:33 [ 31.242854] BUG: Bad rss-counter state mm:00000000bcbb0b1f type:MM_ANONPAGES val:22 [ 31.410825] ================================================================== [ 31.411809] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.412813] Read of size 8 at addr ffff88800fcdd798 by task sshd/218 [ 31.413713] [ 31.414034] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.414952] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.415985] Call Trace: [ 31.416335] [ 31.416638] dump_stack_lvl+0x91/0xf0 [ 31.417159] print_report+0xcc/0x620 [ 31.417680] ? __virt_addr_valid+0x102/0x340 [ 31.418275] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.418934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.419596] kasan_report+0xbe/0xf0 [ 31.420110] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.420796] vma_interval_tree_remove+0xc75/0xec0 [ 31.421464] vma_prepare+0xc54/0x11a0 [ 31.422004] __split_vma+0x5af/0x950 [ 31.422525] ? __pfx___split_vma+0x10/0x10 [ 31.423111] ? find_held_lock+0x2c/0x110 [ 31.423690] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.424318] ? lock_is_held_type+0x9f/0x120 [ 31.424915] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.425610] ? mtree_range_walk+0x632/0x900 [ 31.426224] ? mas_walk+0x5c7/0x7c0 [ 31.426752] do_vmi_munmap+0x1f1/0x2b0 [ 31.427296] mmap_region+0x1f9/0x2660 [ 31.427829] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.428390] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.429177] ? __pfx_lock_acquire+0x10/0x10 [ 31.429774] ? __pfx_mmap_region+0x10/0x10 [ 31.430359] ? security_mmap_addr+0x7d/0xa0 [ 31.430953] ? get_unmapped_area+0x1f5/0x3f0 [ 31.431545] do_mmap+0x854/0xf00 [ 31.432022] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.432560] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.433165] ksys_mmap_pgoff+0x3af/0x500 [ 31.433715] do_syscall_64+0x3f/0x90 [ 31.434232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.434928] RIP: 0033:0x7fa629fb1d82 [ 31.435420] 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 [ 31.437702] RSP: 002b:00007fff496da848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.438676] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa629fb1d82 [ 31.439597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa6293eb000 [ 31.440502] RBP: 00007fa6293eb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.441407] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557fabdcaf60 [ 31.442319] R13: 00007fff496da860 R14: 00007fff496da890 R15: 00007fff496dabf0 [ 31.443241] [ 31.443551] [ 31.443790] Allocated by task 211: [ 31.444249] kasan_save_stack+0x22/0x50 [ 31.444784] kasan_set_track+0x25/0x30 [ 31.445317] __kasan_slab_alloc+0x59/0x70 [ 31.445884] kmem_cache_alloc+0x16b/0x370 [ 31.446435] vm_area_dup+0x20/0x160 [ 31.446918] __split_vma+0x170/0x950 [ 31.447417] split_vma+0xc6/0x110 [ 31.447887] mprotect_fixup+0x8d2/0xb30 [ 31.448446] do_mprotect_pkey+0x87e/0xd40 [ 31.449020] __x64_sys_mprotect+0x78/0xc0 [ 31.449603] do_syscall_64+0x3f/0x90 [ 31.450129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.450843] [ 31.451075] Freed by task 211: [ 31.451510] kasan_save_stack+0x22/0x50 [ 31.452072] kasan_set_track+0x25/0x30 [ 31.452617] kasan_save_free_info+0x2b/0x50 [ 31.453208] __kasan_slab_free+0x10a/0x190 [ 31.453815] kmem_cache_free+0x10d/0x4d0 [ 31.454380] rcu_core+0x8c8/0x2860 [ 31.454873] __do_softirq+0x1b7/0x7d4 [ 31.455404] [ 31.455639] Last potentially related work creation: [ 31.456277] kasan_save_stack+0x22/0x50 [ 31.456826] __kasan_record_aux_stack+0x8e/0xa0 [ 31.457456] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.458175] remove_vma+0x139/0x170 [ 31.458680] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.459299] do_vmi_munmap+0x1f1/0x2b0 [ 31.459838] __vm_munmap+0x138/0x3a0 [ 31.460359] __x64_sys_munmap+0x59/0x80 [ 31.460914] do_syscall_64+0x3f/0x90 [ 31.461435] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.462156] [ 31.462395] The buggy address belongs to the object at ffff88800fcdd740 [ 31.462395] which belongs to the cache vm_area_struct of size 168 [ 31.464020] The buggy address is located 88 bytes inside of [ 31.464020] freed 168-byte region [ffff88800fcdd740, ffff88800fcdd7e8) [ 31.465596] [ 31.465838] The buggy address belongs to the physical page: [ 31.466573] page:00000000632c48d5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcdd [ 31.467783] memcg:ffff88800a0ab201 [ 31.468258] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.468980] page_type: 0xffffffff() [ 31.469479] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.470499] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800a0ab201 [ 31.471506] page dumped because: kasan: bad access detected [ 31.472237] [ 31.472475] Memory state around the buggy address: [ 31.473112] ffff88800fcdd680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.474066] ffff88800fcdd700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.475020] >ffff88800fcdd780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.475972] ^ [ 31.476517] ffff88800fcdd800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.477471] ffff88800fcdd880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.478441] ================================================================== [ 31.479808] Disabling lock debugging due to kernel taint [ 34.175564] BUG: Bad rss-counter state mm:0000000007d7e334 type:MM_FILEPAGES val:33 [ 34.176963] BUG: Bad rss-counter state mm:0000000007d7e334 type:MM_ANONPAGES val:22 [ 34.725310] BUG: Bad rss-counter state mm:000000002819f8a3 type:MM_FILEPAGES val:33 [ 34.726907] BUG: Bad rss-counter state mm:000000002819f8a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15261' (ECDSA) to the list of known hosts. 2023/06/21 01:01:11 fuzzer started 2023/06/21 01:01:11 dialing manager at localhost:36067 2023/06/21 01:01:11 checking machine... 2023/06/21 01:01:11 checking revisions... [ 35.444402] kmemleak: Automatic memory scanning thread ended 2023/06/21 01:01:11 testing simple program... [ 35.475685] cgroup: Unknown subsys name 'net' [ 35.517829] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 01:01:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff88806ce099e0 R8 =ffffffff860d8256 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd7f8 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc6b 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 00007f59bcc0d900 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=00007ffeffeff000 CR3=000000000c642000 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=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 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=00007fdbdfbe1cd0 CR3=00000000168c8000 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=2030313a31303a3130203132206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030313a31303a3130203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000