syzkaller login: [ 38.869303] BUG: Bad rss-counter state mm:00000000966c5806 type:MM_FILEPAGES val:33 [ 38.870411] BUG: Bad rss-counter state mm:00000000966c5806 type:MM_ANONPAGES val:22 [ 38.912366] ================================================================== [ 38.913451] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.914441] Read of size 8 at addr ffff88800ee3c310 by task sshd/219 [ 38.915252] [ 38.915485] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.916399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.917440] Call Trace: [ 38.917780] [ 38.918082] dump_stack_lvl+0x91/0xf0 [ 38.918607] print_report+0xcc/0x620 [ 38.919118] ? __virt_addr_valid+0x102/0x340 [ 38.919702] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.920360] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.921032] kasan_report+0xbe/0xf0 [ 38.921535] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.922196] vma_interval_tree_remove+0xc75/0xec0 [ 38.922838] vma_prepare+0xc54/0x11a0 [ 38.923346] __split_vma+0x5af/0x950 [ 38.923848] ? __pfx___split_vma+0x10/0x10 [ 38.924415] ? find_held_lock+0x2c/0x110 [ 38.924983] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.925589] ? lock_is_held_type+0x9f/0x120 [ 38.926161] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.926801] ? mtree_range_walk+0x632/0x900 [ 38.927386] ? mas_walk+0x5c7/0x7c0 [ 38.927892] do_vmi_munmap+0x1f1/0x2b0 [ 38.928414] mmap_region+0x1f9/0x2660 [ 38.928952] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.929494] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.930255] ? __pfx_lock_acquire+0x10/0x10 [ 38.930818] ? __pfx_mmap_region+0x10/0x10 [ 38.931382] ? security_mmap_addr+0x7d/0xa0 [ 38.931943] ? get_unmapped_area+0x1f5/0x3f0 [ 38.932530] do_mmap+0x854/0xf00 [ 38.933006] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.933533] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.934129] ksys_mmap_pgoff+0x3af/0x500 [ 38.934662] do_syscall_64+0x3f/0x90 [ 38.935175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.935866] RIP: 0033:0x7f01a878bd82 [ 38.936349] 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 [ 38.938807] RSP: 002b:00007ffcafc79938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.939717] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f01a878bd82 [ 38.940573] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f01a7bc5000 [ 38.941530] RBP: 00007f01a7bc5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.942428] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556ac2abaf70 [ 38.943325] R13: 00007ffcafc79950 R14: 00007ffcafc79980 R15: 00007ffcafc79ce0 [ 38.944234] [ 38.944544] [ 38.944771] Allocated by task 212: [ 38.945235] kasan_save_stack+0x22/0x50 [ 38.945773] kasan_set_track+0x25/0x30 [ 38.946296] __kasan_slab_alloc+0x59/0x70 [ 38.946856] kmem_cache_alloc+0x16b/0x370 [ 38.947406] vm_area_dup+0x20/0x160 [ 38.947892] __split_vma+0x170/0x950 [ 38.948383] split_vma+0xc6/0x110 [ 38.948850] mprotect_fixup+0x8d2/0xb30 [ 38.949407] do_mprotect_pkey+0x87e/0xd40 [ 38.949964] __x64_sys_mprotect+0x78/0xc0 [ 38.950522] do_syscall_64+0x3f/0x90 [ 38.951031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.951719] [ 38.951950] Freed by task 203: [ 38.952367] kasan_save_stack+0x22/0x50 [ 38.952909] kasan_set_track+0x25/0x30 [ 38.953434] kasan_save_free_info+0x2b/0x50 [ 38.953996] __kasan_slab_free+0x10a/0x190 [ 38.954562] kmem_cache_free+0x10d/0x4d0 [ 38.955099] rcu_core+0x8c8/0x2860 [ 38.955575] __do_softirq+0x1b7/0x7d4 [ 38.956083] [ 38.956314] Last potentially related work creation: [ 38.956952] kasan_save_stack+0x22/0x50 [ 38.957485] __kasan_record_aux_stack+0x8e/0xa0 [ 38.958098] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.958771] remove_vma+0x139/0x170 [ 38.959246] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.959836] do_vmi_munmap+0x1f1/0x2b0 [ 38.960350] __vm_munmap+0x138/0x3a0 [ 38.960844] __x64_sys_munmap+0x59/0x80 [ 38.961388] do_syscall_64+0x3f/0x90 [ 38.961897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.962583] [ 38.962813] Second to last potentially related work creation: [ 38.963545] kasan_save_stack+0x22/0x50 [ 38.964077] __kasan_record_aux_stack+0x8e/0xa0 [ 38.964684] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.965376] remove_vma+0x139/0x170 [ 38.965859] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.966452] do_vmi_munmap+0x1f1/0x2b0 [ 38.966968] __vm_munmap+0x138/0x3a0 [ 38.967466] __x64_sys_munmap+0x59/0x80 [ 38.967995] do_syscall_64+0x3f/0x90 [ 38.968498] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.969204] [ 38.969434] The buggy address belongs to the object at ffff88800ee3c2b8 [ 38.969434] which belongs to the cache vm_area_struct of size 168 [ 38.970997] The buggy address is located 88 bytes inside of [ 38.970997] freed 168-byte region [ffff88800ee3c2b8, ffff88800ee3c360) [ 38.972489] [ 38.972717] The buggy address belongs to the physical page: [ 38.973432] page:000000003928eb62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xee3c [ 38.974588] memcg:ffff88800d6c7c01 [ 38.975041] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.975732] page_type: 0xffffffff() [ 38.976215] raw: 0100000000000200 ffff8880087a0c80 ffffea00003e6240 dead000000000008 [ 38.977209] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d6c7c01 [ 38.978174] page dumped because: kasan: bad access detected [ 38.978876] [ 38.979109] Memory state around the buggy address: [ 38.979725] ffff88800ee3c200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.980632] ffff88800ee3c280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.981570] >ffff88800ee3c300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.982469] ^ [ 38.982968] ffff88800ee3c380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.983879] ffff88800ee3c400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.984781] ================================================================== [ 38.986006] Disabling lock debugging due to kernel taint [ 41.076560] BUG: Bad rss-counter state mm:0000000028c5dbe5 type:MM_FILEPAGES val:33 [ 41.077741] BUG: Bad rss-counter state mm:0000000028c5dbe5 type:MM_ANONPAGES val:22 [ 41.478303] BUG: Bad rss-counter state mm:00000000d8dbcf76 type:MM_FILEPAGES val:33 [ 41.479247] BUG: Bad rss-counter state mm:00000000d8dbcf76 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39686' (ECDSA) to the list of known hosts. 2023/06/20 18:16:38 fuzzer started 2023/06/20 18:16:38 dialing manager at localhost:36067 2023/06/20 18:16:38 checking machine... 2023/06/20 18:16:38 checking revisions... [ 42.240905] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:16:38 testing simple program... [ 42.296363] cgroup: Unknown subsys name 'net' [ 42.333307] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:16:38 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=00007fffb2f9e908 CR3=000000001023a000 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=2038333a36313a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a36313a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff888019c551c0 RSI=0000000000000000 RDI=00007f84a9f76044 RBP=ffff88800ea37f58 RSP=ffff88800ea37f20 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000007 R13=0000000000000000 R14=00007f84a9f76044 R15=0000000000000000 RIP=ffffffff8113cf84 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f84a9422900 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=00007f84a9f76044 CR3=000000000ca64000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000 XMM04=000000000000000000000000000000ff XMM05=000000000000000000000000000000ff XMM06=6c6113696d72655a20322e321c302e00 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000