[ 63.446102] BUG: Bad rss-counter state mm:000000007a9fda7e type:MM_FILEPAGES val:33 [ 63.447370] BUG: Bad rss-counter state mm:000000007a9fda7e type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 63.602632] ================================================================== [ 63.603543] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.604562] Read of size 8 at addr ffff88800ec1b140 by task sshd/219 [ 63.605348] [ 63.605574] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.606437] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.607435] Call Trace: [ 63.607751] [ 63.608033] dump_stack_lvl+0x91/0xf0 [ 63.608524] print_report+0xcc/0x620 [ 63.609002] ? __virt_addr_valid+0x102/0x340 [ 63.609576] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.610191] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.610801] kasan_report+0xbe/0xf0 [ 63.611277] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.611920] vma_interval_tree_remove+0xc75/0xec0 [ 63.612519] vma_prepare+0xc54/0x11a0 [ 63.612994] __split_vma+0x5af/0x950 [ 63.613472] ? __pfx___split_vma+0x10/0x10 [ 63.614011] ? find_held_lock+0x2c/0x110 [ 63.614529] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.615089] ? lock_is_held_type+0x9f/0x120 [ 63.615625] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.616230] ? mtree_range_walk+0x632/0x900 [ 63.616777] ? mas_walk+0x5c7/0x7c0 [ 63.617248] do_vmi_munmap+0x1f1/0x2b0 [ 63.617757] mmap_region+0x1f9/0x2660 [ 63.618235] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.618739] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.619501] ? __pfx_lock_acquire+0x10/0x10 [ 63.620032] ? __pfx_mmap_region+0x10/0x10 [ 63.620565] ? security_mmap_addr+0x7d/0xa0 [ 63.621094] ? get_unmapped_area+0x1f5/0x3f0 [ 63.621663] do_mmap+0x854/0xf00 [ 63.622099] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.622593] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.623158] ksys_mmap_pgoff+0x3af/0x500 [ 63.623658] do_syscall_64+0x3f/0x90 [ 63.624135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.624780] RIP: 0033:0x7f35fb86dd82 [ 63.625237] 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 [ 63.627360] RSP: 002b:00007ffffa0be418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.628269] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f35fb86dd82 [ 63.629118] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35faca7000 [ 63.629977] RBP: 00007f35faca7000 R08: 0000000000000009 R09: 0000000000001000 [ 63.630823] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e8ffa21ec0 [ 63.631665] R13: 00007ffffa0be430 R14: 00007ffffa0be460 R15: 00007ffffa0be7c0 [ 63.632510] [ 63.632802] [ 63.633013] Allocated by task 212: [ 63.633438] kasan_save_stack+0x22/0x50 [ 63.633956] kasan_set_track+0x25/0x30 [ 63.634445] __kasan_slab_alloc+0x59/0x70 [ 63.634971] kmem_cache_alloc+0x16b/0x370 [ 63.635483] vm_area_dup+0x20/0x160 [ 63.635938] __split_vma+0x170/0x950 [ 63.636400] split_vma+0xc6/0x110 [ 63.636842] mprotect_fixup+0x8d2/0xb30 [ 63.637339] do_mprotect_pkey+0x87e/0xd40 [ 63.637876] __x64_sys_mprotect+0x78/0xc0 [ 63.638399] do_syscall_64+0x3f/0x90 [ 63.638876] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.639519] [ 63.639731] Freed by task 212: [ 63.640126] kasan_save_stack+0x22/0x50 [ 63.640623] kasan_set_track+0x25/0x30 [ 63.641120] kasan_save_free_info+0x2b/0x50 [ 63.641669] __kasan_slab_free+0x10a/0x190 [ 63.642209] kmem_cache_free+0x10d/0x4d0 [ 63.642710] rcu_core+0x8c8/0x2860 [ 63.643156] __do_softirq+0x1b7/0x7d4 [ 63.643629] [ 63.643843] Last potentially related work creation: [ 63.644428] kasan_save_stack+0x22/0x50 [ 63.644925] __kasan_record_aux_stack+0x8e/0xa0 [ 63.645493] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.646150] remove_vma+0x139/0x170 [ 63.646603] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.647162] do_vmi_munmap+0x1f1/0x2b0 [ 63.647641] __vm_munmap+0x138/0x3a0 [ 63.648109] __x64_sys_munmap+0x59/0x80 [ 63.648601] do_syscall_64+0x3f/0x90 [ 63.649074] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.649725] [ 63.649939] Second to last potentially related work creation: [ 63.650629] kasan_save_stack+0x22/0x50 [ 63.651124] __kasan_record_aux_stack+0x8e/0xa0 [ 63.651696] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.652334] remove_vma+0x139/0x170 [ 63.652780] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.653337] do_vmi_munmap+0x1f1/0x2b0 [ 63.653832] __vm_munmap+0x138/0x3a0 [ 63.654294] elf_map+0x26f/0x310 [ 63.654738] load_elf_binary+0x3417/0x5030 [ 63.655273] bprm_execve+0x803/0x1940 [ 63.655738] do_execveat_common+0x734/0x8e0 [ 63.656260] __x64_sys_execve+0x93/0xc0 [ 63.656750] do_syscall_64+0x3f/0x90 [ 63.657220] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.657867] [ 63.658079] The buggy address belongs to the object at ffff88800ec1b0e8 [ 63.658079] which belongs to the cache vm_area_struct of size 168 [ 63.659534] The buggy address is located 88 bytes inside of [ 63.659534] freed 168-byte region [ffff88800ec1b0e8, ffff88800ec1b190) [ 63.660935] [ 63.661150] The buggy address belongs to the physical page: [ 63.661820] page:00000000a71b5abb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xec1b [ 63.662893] memcg:ffff88800ead5f01 [ 63.663315] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 63.664012] page_type: 0xffffffff() [ 63.664462] raw: 0100000000000200 ffff88800879fc80 ffffea000035b380 dead000000000007 [ 63.665386] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ead5f01 [ 63.666293] page dumped because: kasan: bad access detected [ 63.666963] [ 63.667184] Memory state around the buggy address: [ 63.667762] ffff88800ec1b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 63.668611] ffff88800ec1b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 63.669460] >ffff88800ec1b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 63.670339] ^ [ 63.670980] ffff88800ec1b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 63.671840] ffff88800ec1b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 63.672696] ================================================================== [ 63.673783] Disabling lock debugging due to kernel taint [ 65.633830] BUG: Bad rss-counter state mm:0000000041059970 type:MM_FILEPAGES val:33 [ 65.634937] BUG: Bad rss-counter state mm:0000000041059970 type:MM_ANONPAGES val:22 [ 66.165226] BUG: Bad rss-counter state mm:00000000b00a9207 type:MM_FILEPAGES val:33 [ 66.166265] BUG: Bad rss-counter state mm:00000000b00a9207 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8417' (ECDSA) to the list of known hosts. 2023/06/19 17:21:49 fuzzer started 2023/06/19 17:21:50 dialing manager at localhost:44161 2023/06/19 17:21:50 checking machine... 2023/06/19 17:21:50 checking revisions... [ 66.871695] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:21:50 testing simple program... [ 66.923486] cgroup: Unknown subsys name 'net' [ 66.991530] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:21:40 Registers: info registers vcpu 0 RAX=0000000000000034 RBX=0000000000000014 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f9f446cd95b RDI=000056482e9528b0 RBP=00007f9f446cd956 RSP=00007ffe98ac5630 R8 =00000000ffffffff R9 =0000000000000034 R10=000056482e97a1c0 R11=0000000000000000 R12=0000000000000001 R13=00007ffe98ac5750 R14=0000000000000002 R15=000056482e9528b0 RIP=00007f9f44006212 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9f43b9e900 00000000 00000000 GS =0000 0000000000000000 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=00007f9f44153650 CR3=000000000f890000 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=ffbc64ffffbc44ffffbc34ffffbc9f00 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=00007ffec2a3ee28 CR3=00000000097c2000 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=2039343a31323a3731203931206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039343a31323a3731203931 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000