[ 54.469675] BUG: Bad rss-counter state mm:000000003df5833c type:MM_FILEPAGES val:33 [ 54.470694] BUG: Bad rss-counter state mm:000000003df5833c type:MM_ANONPAGES val:22 [ 54.634233] ================================================================== [ 54.635177] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 54.636126] Read of size 8 at addr ffff88801a1ac4e0 by task sshd/218 [ 54.636971] [ 54.637238] CPU: 1 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 54.638288] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 54.639288] Call Trace: [ 54.639618] [ 54.639902] dump_stack_lvl+0x91/0xf0 [ 54.640389] print_report+0xcc/0x620 [ 54.640878] ? __virt_addr_valid+0x102/0x340 [ 54.641445] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.642076] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.642699] kasan_report+0xbe/0xf0 [ 54.643182] ? vma_interval_tree_remove+0xc75/0xec0 [ 54.643812] vma_interval_tree_remove+0xc75/0xec0 [ 54.644419] vma_prepare+0xc54/0x11a0 [ 54.644901] __split_vma+0x5af/0x950 [ 54.645394] ? __pfx___split_vma+0x10/0x10 [ 54.645924] ? find_held_lock+0x2c/0x110 [ 54.646455] do_vmi_align_munmap+0x2ba/0x11f0 [ 54.647016] ? lock_is_held_type+0x9f/0x120 [ 54.647557] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 54.648166] ? mtree_range_walk+0x632/0x900 [ 54.648727] ? mas_walk+0x5c7/0x7c0 [ 54.649205] do_vmi_munmap+0x1f1/0x2b0 [ 54.649706] mmap_region+0x1f9/0x2660 [ 54.650196] ? vm_mmap_pgoff+0x15c/0x3a0 [ 54.650720] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 54.651437] ? __pfx_lock_acquire+0x10/0x10 [ 54.651972] ? __pfx_mmap_region+0x10/0x10 [ 54.652508] ? security_mmap_addr+0x7d/0xa0 [ 54.653040] ? get_unmapped_area+0x1f5/0x3f0 [ 54.653611] do_mmap+0x854/0xf00 [ 54.654057] vm_mmap_pgoff+0x1a6/0x3a0 [ 54.654552] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 54.655124] ksys_mmap_pgoff+0x3af/0x500 [ 54.655631] do_syscall_64+0x3f/0x90 [ 54.656105] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.656757] RIP: 0033:0x7fb23595ad82 [ 54.657227] 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 [ 54.659391] RSP: 002b:00007ffd543c3788 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 54.660318] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb23595ad82 [ 54.661192] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb234d94000 [ 54.662044] RBP: 00007fb234d94000 R08: 0000000000000009 R09: 0000000000001000 [ 54.662892] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555be691cec0 [ 54.663741] R13: 00007ffd543c37a0 R14: 00007ffd543c37d0 R15: 00007ffd543c3b30 [ 54.664602] [ 54.664894] [ 54.665115] Allocated by task 211: [ 54.665557] kasan_save_stack+0x22/0x50 [ 54.666061] kasan_set_track+0x25/0x30 [ 54.666561] __kasan_slab_alloc+0x59/0x70 [ 54.667090] kmem_cache_alloc+0x16b/0x370 [ 54.667604] vm_area_dup+0x20/0x160 [ 54.668061] __split_vma+0x170/0x950 [ 54.668546] split_vma+0xc6/0x110 [ 54.668993] mprotect_fixup+0x8d2/0xb30 [ 54.669512] do_mprotect_pkey+0x87e/0xd40 [ 54.670027] __x64_sys_mprotect+0x78/0xc0 [ 54.670554] do_syscall_64+0x3f/0x90 [ 54.671029] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.671688] [ 54.671904] Freed by task 211: [ 54.672307] kasan_save_stack+0x22/0x50 [ 54.672810] kasan_set_track+0x25/0x30 [ 54.673333] kasan_save_free_info+0x2b/0x50 [ 54.673873] __kasan_slab_free+0x10a/0x190 [ 54.674406] kmem_cache_free+0x10d/0x4d0 [ 54.674919] rcu_core+0x8c8/0x2860 [ 54.675367] __do_softirq+0x1b7/0x7d4 [ 54.675841] [ 54.676061] Last potentially related work creation: [ 54.676659] kasan_save_stack+0x22/0x50 [ 54.677174] __kasan_record_aux_stack+0x8e/0xa0 [ 54.677756] __call_rcu_common.constprop.0+0x6a/0xb90 [ 54.678410] remove_vma+0x139/0x170 [ 54.678866] do_vmi_align_munmap+0xd4a/0x11f0 [ 54.679421] do_vmi_munmap+0x1f1/0x2b0 [ 54.679908] __vm_munmap+0x138/0x3a0 [ 54.680382] __x64_sys_munmap+0x59/0x80 [ 54.680879] do_syscall_64+0x3f/0x90 [ 54.681358] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 54.682004] [ 54.682219] The buggy address belongs to the object at ffff88801a1ac488 [ 54.682219] which belongs to the cache vm_area_struct of size 168 [ 54.683705] The buggy address is located 88 bytes inside of [ 54.683705] freed 168-byte region [ffff88801a1ac488, ffff88801a1ac530) [ 54.685113] [ 54.685347] The buggy address belongs to the physical page: [ 54.686000] page:00000000e6ff016b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a1ac [ 54.687105] memcg:ffff88800e723201 [ 54.687541] flags: 0x100000000000200(slab|node=0|zone=1) [ 54.688194] page_type: 0xffffffff() [ 54.688643] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 54.689570] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e723201 [ 54.690478] page dumped because: kasan: bad access detected [ 54.691146] [ 54.691366] Memory state around the buggy address: [ 54.691947] ffff88801a1ac380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 54.692804] ffff88801a1ac400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 54.693678] >ffff88801a1ac480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.694536] ^ [ 54.695301] ffff88801a1ac500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 54.696175] ffff88801a1ac580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 54.697022] ================================================================== [ 54.698155] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 56.665406] BUG: Bad rss-counter state mm:00000000e0968d8b type:MM_FILEPAGES val:33 [ 56.666364] BUG: Bad rss-counter state mm:00000000e0968d8b type:MM_ANONPAGES val:22 [ 57.163541] BUG: Bad rss-counter state mm:000000006a3cc30b type:MM_FILEPAGES val:33 [ 57.164721] BUG: Bad rss-counter state mm:000000006a3cc30b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55327' (ECDSA) to the list of known hosts. 2023/06/20 02:45:02 fuzzer started 2023/06/20 02:45:03 dialing manager at localhost:44161 2023/06/20 02:45:03 checking machine... 2023/06/20 02:45:03 checking revisions... [ 57.965271] kmemleak: Automatic memory scanning thread ended 2023/06/20 02:45:03 testing simple program... [ 58.009418] cgroup: Unknown subsys name 'net' [ 58.054071] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 02:44:32 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800fcef9f8 RCX=0000000000000001 RDX=ffff88800fcefa10 RSI=ffff88800fcef9f8 RDI=ffff88800fcef970 RBP=dffffc0000000000 RSP=ffff88800fcef910 R8 =0000000000000001 R9 =ffff88800fcef9a0 R10=0000000000038001 R11=0000000000003c0d R12=ffffed1001f9df2e R13=ffffed1001f9df2d R14=ffff88800fcef9a8 R15=ffff88800fcef960 RIP=ffffffff81132f8e RFL=00000212 [----A--] 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 00007f9b2bc64900 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=00007f9b2c21c0b0 CR3=000000000e936000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe1fccd2c20 CR3=000000000d80c000 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=2032303a35343a3230203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032303a35343a3230203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000