syzkaller login: [ 39.203164] BUG: Bad rss-counter state mm:00000000aa1e1678 type:MM_FILEPAGES val:33 [ 39.204537] BUG: Bad rss-counter state mm:00000000aa1e1678 type:MM_ANONPAGES val:22 [ 39.345546] ================================================================== [ 39.346484] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.347437] Read of size 8 at addr ffff88800fbe3880 by task sshd/219 [ 39.348338] [ 39.348556] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.349453] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.350447] Call Trace: [ 39.350765] [ 39.351051] dump_stack_lvl+0x91/0xf0 [ 39.351546] print_report+0xcc/0x620 [ 39.352029] ? __virt_addr_valid+0x102/0x340 [ 39.352578] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.353218] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.353830] kasan_report+0xbe/0xf0 [ 39.354318] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.354952] vma_interval_tree_remove+0xc75/0xec0 [ 39.355556] vma_prepare+0xc54/0x11a0 [ 39.356040] __split_vma+0x5af/0x950 [ 39.356512] ? __pfx___split_vma+0x10/0x10 [ 39.357049] ? find_held_lock+0x2c/0x110 [ 39.357575] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.358140] ? lock_is_held_type+0x9f/0x120 [ 39.358677] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.359288] ? mtree_range_walk+0x632/0x900 [ 39.359836] ? mas_walk+0x5c7/0x7c0 [ 39.360307] do_vmi_munmap+0x1f1/0x2b0 [ 39.360797] mmap_region+0x1f9/0x2660 [ 39.361309] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.361817] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.362522] ? __pfx_lock_acquire+0x10/0x10 [ 39.363053] ? __pfx_mmap_region+0x10/0x10 [ 39.363591] ? security_mmap_addr+0x7d/0xa0 [ 39.364125] ? get_unmapped_area+0x1f5/0x3f0 [ 39.364679] do_mmap+0x854/0xf00 [ 39.365125] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.365632] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.366195] ksys_mmap_pgoff+0x3af/0x500 [ 39.366702] do_syscall_64+0x3f/0x90 [ 39.367180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.367833] RIP: 0033:0x7f218dbb8d82 [ 39.368295] 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 [ 39.370466] RSP: 002b:00007ffe022b8848 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.371376] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f218dbb8d82 [ 39.372230] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f218cff2000 [ 39.373103] RBP: 00007f218cff2000 R08: 0000000000000009 R09: 0000000000001000 [ 39.373951] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e44d1a8b20 [ 39.374825] R13: 00007ffe022b8860 R14: 00007ffe022b8890 R15: 00007ffe022b8bf0 [ 39.375690] [ 39.375980] [ 39.376212] Allocated by task 212: [ 39.376647] kasan_save_stack+0x22/0x50 [ 39.377159] kasan_set_track+0x25/0x30 [ 39.377658] __kasan_slab_alloc+0x59/0x70 [ 39.378186] kmem_cache_alloc+0x16b/0x370 [ 39.378703] vm_area_dup+0x20/0x160 [ 39.379159] __split_vma+0x170/0x950 [ 39.379630] split_vma+0xc6/0x110 [ 39.380073] mprotect_fixup+0x8d2/0xb30 [ 39.380577] do_mprotect_pkey+0x87e/0xd40 [ 39.381111] __x64_sys_mprotect+0x78/0xc0 [ 39.381631] do_syscall_64+0x3f/0x90 [ 39.382108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.382752] [ 39.382970] Freed by task 202: [ 39.383365] kasan_save_stack+0x22/0x50 [ 39.383879] kasan_set_track+0x25/0x30 [ 39.384375] kasan_save_free_info+0x2b/0x50 [ 39.384924] __kasan_slab_free+0x10a/0x190 [ 39.385468] kmem_cache_free+0x10d/0x4d0 [ 39.385981] rcu_core+0x8c8/0x2860 [ 39.386429] __do_softirq+0x1b7/0x7d4 [ 39.386901] [ 39.387119] Last potentially related work creation: [ 39.387708] kasan_save_stack+0x22/0x50 [ 39.388230] __kasan_record_aux_stack+0x8e/0xa0 [ 39.388816] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.389544] remove_vma+0x139/0x170 [ 39.389993] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.390556] do_vmi_munmap+0x1f1/0x2b0 [ 39.391044] __vm_munmap+0x138/0x3a0 [ 39.391510] __x64_sys_munmap+0x59/0x80 [ 39.392003] do_syscall_64+0x3f/0x90 [ 39.392478] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.393136] [ 39.393353] The buggy address belongs to the object at ffff88800fbe3828 [ 39.393353] which belongs to the cache vm_area_struct of size 168 [ 39.394820] The buggy address is located 88 bytes inside of [ 39.394820] freed 168-byte region [ffff88800fbe3828, ffff88800fbe38d0) [ 39.396223] [ 39.396440] The buggy address belongs to the physical page: [ 39.397113] page:00000000f856b15b refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800fbe30e8 pfn:0xfbe3 [ 39.398348] memcg:ffff888019843801 [ 39.398777] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.399474] page_type: 0xffffffff() [ 39.399934] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 39.400866] raw: ffff88800fbe30e8 000000008011000f 00000001ffffffff ffff888019843801 [ 39.401790] page dumped because: kasan: bad access detected [ 39.402455] [ 39.402669] Memory state around the buggy address: [ 39.403263] ffff88800fbe3780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 39.404121] ffff88800fbe3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.405016] >ffff88800fbe3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.405886] ^ [ 39.406300] ffff88800fbe3900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.407163] ffff88800fbe3980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc 00 [ 39.408022] ================================================================== [ 39.409055] Disabling lock debugging due to kernel taint [ 41.493824] BUG: Bad rss-counter state mm:0000000030093f5c type:MM_FILEPAGES val:33 [ 41.495021] BUG: Bad rss-counter state mm:0000000030093f5c type:MM_ANONPAGES val:22 [ 41.965742] BUG: Bad rss-counter state mm:00000000f35c1905 type:MM_FILEPAGES val:33 [ 41.966733] BUG: Bad rss-counter state mm:00000000f35c1905 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40469' (ECDSA) to the list of known hosts. 2023/06/20 04:02:11 fuzzer started 2023/06/20 04:02:11 dialing manager at localhost:44161 2023/06/20 04:02:11 checking machine... 2023/06/20 04:02:11 checking revisions... [ 42.714169] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:02:12 testing simple program... [ 42.766775] cgroup: Unknown subsys name 'net' [ 42.818214] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:11 Registers: info registers vcpu 0 RAX=00000000000005c1 RBX=00007f7edd650c00 RCX=00007f7edd6475b0 RDX=0000000000000012 RSI=0000000000000001 RDI=00007f7edd3b05d0 RBP=00007ffee64ed7f0 RSP=00007ffee64ed6f0 R8 =0000000000000000 R9 =00007f7edd6491b8 R10=00007f7edd6db700 R11=00007f7edd749510 R12=0000000000000007 R13=000001eb00000007 R14=00007f7edd64a3b8 R15=00007f7edd749510 RIP=00007f7eddf30780 RFL=00000202 [-------] 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 00007f7edd3ad900 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=00007f7edd621000 CR3=000000001473e000 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=00000000ff0000000000000000000000 XMM01=ffffffff00ffffffffffffffffffffff XMM02=42494c4700342e332e325f4342494c47 XMM03=000000000000004700352e322e325f43 XMM04=4342494c4700362e322e325f4342494c XMM05=00007f7edd966f6000007f7eddb20950 XMM06=00007f7eddb2044000007f7eddb1ff20 XMM07=00007f7edd46a12000007f7edd469b10 XMM08=00007f7edd4695f000007f7edd469060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c0a745 RBX=ffffffff86053a2c RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a2c RSP=ffff88806cf09998 R8 =ffffffff864b9d50 R9 =ffff88806cf09a90 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=ffffffff86053a2c R15=dffffc0000000000 RIP=ffffffff8112fc7f RFL=00000213 [----A-C] 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 00007fb27e465900 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=00007f217e73d650 CR3=0000000008dae000 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=203b93f3610768bdf34fb95cb3f05aca XMM02=000000000011e2c0d59e07bde36eea69 XMM03=000000000011e3e8ec2efd57dc4c00df XMM04=d8a59eaeec0de2a500000000000ae988 XMM05=8d72450594407b8a00000000001352d0 XMM06=dfcdbad4f1609c370000000000133e18 XMM07=fb795ef6d657705600000000001245f0 XMM08=2c67c8bc2e329bc3000000000011e3e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000