[ 31.315026] BUG: Bad rss-counter state mm:00000000e127607b type:MM_FILEPAGES val:33 [ 31.315942] BUG: Bad rss-counter state mm:00000000e127607b type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.479551] ================================================================== [ 31.480398] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.481279] Read of size 8 at addr ffff88800e72b798 by task sshd/219 [ 31.481997] [ 31.482297] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.483128] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.484063] Call Trace: [ 31.484397] [ 31.484677] dump_stack_lvl+0x91/0xf0 [ 31.485156] print_report+0xcc/0x620 [ 31.485616] ? __virt_addr_valid+0x102/0x340 [ 31.486144] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.486758] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.487347] kasan_report+0xbe/0xf0 [ 31.487801] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.488394] vma_interval_tree_remove+0xc75/0xec0 [ 31.488968] vma_prepare+0xc54/0x11a0 [ 31.489426] __split_vma+0x5af/0x950 [ 31.489875] ? __pfx___split_vma+0x10/0x10 [ 31.490379] ? find_held_lock+0x2c/0x110 [ 31.490901] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.491450] ? lock_is_held_type+0x9f/0x120 [ 31.491962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.492553] ? mtree_range_walk+0x632/0x900 [ 31.493086] ? mas_walk+0x5c7/0x7c0 [ 31.493540] do_vmi_munmap+0x1f1/0x2b0 [ 31.494019] mmap_region+0x1f9/0x2660 [ 31.494477] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.494985] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.495668] ? __pfx_lock_acquire+0x10/0x10 [ 31.496171] ? __pfx_mmap_region+0x10/0x10 [ 31.496679] ? security_mmap_addr+0x7d/0xa0 [ 31.497189] ? get_unmapped_area+0x1f5/0x3f0 [ 31.497711] do_mmap+0x854/0xf00 [ 31.498131] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.498604] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.499172] ksys_mmap_pgoff+0x3af/0x500 [ 31.499672] do_syscall_64+0x3f/0x90 [ 31.500129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.500742] RIP: 0033:0x7fc67265fd82 [ 31.501176] 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 [ 31.503230] RSP: 002b:00007fff4bda0618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.504111] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc67265fd82 [ 31.504919] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc671a99000 [ 31.505762] RBP: 00007fc671a99000 R08: 0000000000000009 R09: 0000000000001000 [ 31.506575] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563f1f45fec0 [ 31.507387] R13: 00007fff4bda0630 R14: 00007fff4bda0660 R15: 00007fff4bda09c0 [ 31.508201] [ 31.508484] [ 31.508687] Allocated by task 212: [ 31.509092] kasan_save_stack+0x22/0x50 [ 31.509577] kasan_set_track+0x25/0x30 [ 31.510057] __kasan_slab_alloc+0x59/0x70 [ 31.510554] kmem_cache_alloc+0x16b/0x370 [ 31.511068] vm_area_dup+0x20/0x160 [ 31.511506] __split_vma+0x170/0x950 [ 31.511952] split_vma+0xc6/0x110 [ 31.512368] mprotect_fixup+0x8d2/0xb30 [ 31.512859] do_mprotect_pkey+0x87e/0xd40 [ 31.513354] __x64_sys_mprotect+0x78/0xc0 [ 31.513854] do_syscall_64+0x3f/0x90 [ 31.514312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.514937] [ 31.515141] Freed by task 13: [ 31.515514] kasan_save_stack+0x22/0x50 [ 31.516004] kasan_set_track+0x25/0x30 [ 31.516473] kasan_save_free_info+0x2b/0x50 [ 31.516993] __kasan_slab_free+0x10a/0x190 [ 31.517508] kmem_cache_free+0x10d/0x4d0 [ 31.517995] rcu_core+0x8c8/0x2860 [ 31.518424] __do_softirq+0x1b7/0x7d4 [ 31.518901] [ 31.519109] Last potentially related work creation: [ 31.519670] kasan_save_stack+0x22/0x50 [ 31.520147] __kasan_record_aux_stack+0x8e/0xa0 [ 31.520687] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.521301] remove_vma+0x139/0x170 [ 31.521732] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.522267] do_vmi_munmap+0x1f1/0x2b0 [ 31.522732] __vm_munmap+0x138/0x3a0 [ 31.523172] __x64_sys_munmap+0x59/0x80 [ 31.523638] do_syscall_64+0x3f/0x90 [ 31.524088] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.524692] [ 31.524896] The buggy address belongs to the object at ffff88800e72b740 [ 31.524896] which belongs to the cache vm_area_struct of size 168 [ 31.526276] The buggy address is located 88 bytes inside of [ 31.526276] freed 168-byte region [ffff88800e72b740, ffff88800e72b7e8) [ 31.527605] [ 31.527810] The buggy address belongs to the physical page: [ 31.528425] page:00000000a80b8a03 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe72b [ 31.529443] memcg:ffff88800d765b01 [ 31.529848] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.530449] page_type: 0xffffffff() [ 31.530934] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.531857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d765b01 [ 31.532765] page dumped because: kasan: bad access detected [ 31.533425] [ 31.533643] Memory state around the buggy address: [ 31.534237] ffff88800e72b680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.535117] ffff88800e72b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.535980] >ffff88800e72b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.536835] ^ [ 31.537340] ffff88800e72b800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 31.538199] ffff88800e72b880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 31.539068] ================================================================== [ 31.540344] Disabling lock debugging due to kernel taint [ 33.538328] BUG: Bad rss-counter state mm:000000007995eb2e type:MM_FILEPAGES val:33 [ 33.539330] BUG: Bad rss-counter state mm:000000007995eb2e type:MM_ANONPAGES val:22 [ 33.947080] BUG: Bad rss-counter state mm:00000000e69cea82 type:MM_FILEPAGES val:33 [ 33.948132] BUG: Bad rss-counter state mm:00000000e69cea82 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12085' (ECDSA) to the list of known hosts. 2023/06/21 08:47:03 fuzzer started 2023/06/21 08:47:03 dialing manager at localhost:36067 2023/06/21 08:47:03 checking machine... 2023/06/21 08:47:03 checking revisions... [ 34.616558] kmemleak: Automatic memory scanning thread ended 2023/06/21 08:47:03 testing simple program... [ 34.675608] cgroup: Unknown subsys name 'net' [ 34.732925] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:47:03 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f7c26b6e8b0 CR3=000000000e992000 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=2033303a37343a3830203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a37343a3830203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88806cf09a70 RCX=0000000000000002 RDX=1ffff1100d9e134e RSI=ffff88806cf09db8 RDI=ffff88806cf09a70 RBP=ffff88806cf09db8 RSP=ffff88806cf099c8 R8 =ffffffff86138e90 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000020d8f R12=0000000000000008 R13=ffff88806cf09ab8 R14=ffff88806cf09dc0 R15=ffff88806cf09a70 RIP=ffffffff81130428 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 00007fe3c0fbf900 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=00007fff4021b000 CR3=000000001a834000 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