syzkaller login: [ 38.255777] BUG: Bad rss-counter state mm:00000000e6c25988 type:MM_FILEPAGES val:33 [ 38.256900] BUG: Bad rss-counter state mm:00000000e6c25988 type:MM_ANONPAGES val:22 [ 38.406253] ================================================================== [ 38.407184] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.408121] Read of size 8 at addr ffff88800ddc1140 by task sshd/222 [ 38.408959] [ 38.409181] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.410053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.411033] Call Trace: [ 38.411346] [ 38.411630] dump_stack_lvl+0x91/0xf0 [ 38.412115] print_report+0xcc/0x620 [ 38.412590] ? __virt_addr_valid+0x102/0x340 [ 38.413139] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.413764] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.414386] kasan_report+0xbe/0xf0 [ 38.414864] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.415620] vma_interval_tree_remove+0xc75/0xec0 [ 38.416237] vma_prepare+0xc54/0x11a0 [ 38.416717] __split_vma+0x5af/0x950 [ 38.417202] ? __pfx___split_vma+0x10/0x10 [ 38.417734] ? find_held_lock+0x2c/0x110 [ 38.418297] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.418877] ? lock_is_held_type+0x9f/0x120 [ 38.419433] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.420069] ? mtree_range_walk+0x632/0x900 [ 38.420636] ? mas_walk+0x5c7/0x7c0 [ 38.421122] do_vmi_munmap+0x1f1/0x2b0 [ 38.421625] mmap_region+0x1f9/0x2660 [ 38.422129] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.422659] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.423399] ? __pfx_lock_acquire+0x10/0x10 [ 38.423953] ? __pfx_mmap_region+0x10/0x10 [ 38.424504] ? security_mmap_addr+0x7d/0xa0 [ 38.425043] ? get_unmapped_area+0x1f5/0x3f0 [ 38.425602] do_mmap+0x854/0xf00 [ 38.426059] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.426579] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.427159] ksys_mmap_pgoff+0x3af/0x500 [ 38.427690] do_syscall_64+0x3f/0x90 [ 38.428185] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.428851] RIP: 0033:0x7f9cca81cd82 [ 38.429313] 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 [ 38.431534] RSP: 002b:00007ffc7915d618 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.432465] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9cca81cd82 [ 38.433343] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9cc9c56000 [ 38.434228] RBP: 00007f9cc9c56000 R08: 0000000000000009 R09: 0000000000001000 [ 38.435103] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561536905ec0 [ 38.435994] R13: 00007ffc7915d630 R14: 00007ffc7915d660 R15: 00007ffc7915d9c0 [ 38.436880] [ 38.437181] [ 38.437394] Allocated by task 215: [ 38.437843] kasan_save_stack+0x22/0x50 [ 38.438358] kasan_set_track+0x25/0x30 [ 38.438856] __kasan_slab_alloc+0x59/0x70 [ 38.439381] kmem_cache_alloc+0x16b/0x370 [ 38.439899] vm_area_dup+0x20/0x160 [ 38.440363] __split_vma+0x170/0x950 [ 38.440839] split_vma+0xc6/0x110 [ 38.441281] mprotect_fixup+0x8d2/0xb30 [ 38.441805] do_mprotect_pkey+0x87e/0xd40 [ 38.442340] __x64_sys_mprotect+0x78/0xc0 [ 38.442867] do_syscall_64+0x3f/0x90 [ 38.443361] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.444022] [ 38.444247] Freed by task 215: [ 38.444649] kasan_save_stack+0x22/0x50 [ 38.445164] kasan_set_track+0x25/0x30 [ 38.445671] kasan_save_free_info+0x2b/0x50 [ 38.446223] __kasan_slab_free+0x10a/0x190 [ 38.446777] kmem_cache_free+0x10d/0x4d0 [ 38.447326] rcu_core+0x8c8/0x2860 [ 38.447793] __do_softirq+0x1b7/0x7d4 [ 38.448280] [ 38.448502] Last potentially related work creation: [ 38.449107] kasan_save_stack+0x22/0x50 [ 38.449625] __kasan_record_aux_stack+0x8e/0xa0 [ 38.450247] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.450904] remove_vma+0x139/0x170 [ 38.451377] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.451943] do_vmi_munmap+0x1f1/0x2b0 [ 38.452452] __vm_munmap+0x138/0x3a0 [ 38.452937] __x64_sys_munmap+0x59/0x80 [ 38.453453] do_syscall_64+0x3f/0x90 [ 38.453951] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.454615] [ 38.454842] Second to last potentially related work creation: [ 38.455547] kasan_save_stack+0x22/0x50 [ 38.456078] __kasan_record_aux_stack+0x8e/0xa0 [ 38.456678] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.457338] remove_vma+0x139/0x170 [ 38.457815] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.458400] do_vmi_munmap+0x1f1/0x2b0 [ 38.458897] mmap_region+0x1f9/0x2660 [ 38.459386] do_mmap+0x854/0xf00 [ 38.459828] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.460324] ksys_mmap_pgoff+0x3af/0x500 [ 38.460848] do_syscall_64+0x3f/0x90 [ 38.461330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.462005] [ 38.462226] The buggy address belongs to the object at ffff88800ddc10e8 [ 38.462226] which belongs to the cache vm_area_struct of size 168 [ 38.463726] The buggy address is located 88 bytes inside of [ 38.463726] freed 168-byte region [ffff88800ddc10e8, ffff88800ddc1190) [ 38.465166] [ 38.465389] The buggy address belongs to the physical page: [ 38.466067] page:00000000f9805006 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddc1 [ 38.467175] memcg:ffff88800c921101 [ 38.467619] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.468340] page_type: 0xffffffff() [ 38.468807] raw: 0100000000000200 ffff88800879fc80 ffffea000036e900 dead000000000007 [ 38.470058] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c921101 [ 38.471001] page dumped because: kasan: bad access detected [ 38.471698] [ 38.471914] Memory state around the buggy address: [ 38.472526] ffff88800ddc1000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.473397] ffff88800ddc1080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.474294] >ffff88800ddc1100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.475165] ^ [ 38.475832] ffff88800ddc1180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 38.476726] ffff88800ddc1200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 38.477614] ================================================================== [ 38.478615] Disabling lock debugging due to kernel taint [ 40.451371] BUG: Bad rss-counter state mm:00000000d5940ee1 type:MM_FILEPAGES val:33 [ 40.452423] BUG: Bad rss-counter state mm:00000000d5940ee1 type:MM_ANONPAGES val:22 [ 40.912030] BUG: Bad rss-counter state mm:0000000096046ceb type:MM_FILEPAGES val:33 [ 40.913081] BUG: Bad rss-counter state mm:0000000096046ceb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41149' (ECDSA) to the list of known hosts. 2023/06/19 10:56:13 fuzzer started 2023/06/19 10:56:13 dialing manager at localhost:44161 2023/06/19 10:56:13 checking machine... 2023/06/19 10:56:13 checking revisions... [ 41.683855] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:56:13 testing simple program... [ 41.729642] cgroup: Unknown subsys name 'net' [ 41.776146] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:56:05 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=0000000000000000 RSI=00000000000006c2 RDI=ffff888008d71f34 RBP=ffffffff84886b20 RSP=ffff888008d87d28 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=1ffff1100d9c7479 R12=00000000000006c2 R13=0000000000000000 R14=ffff888008d71b40 R15=ffffffff85d3d010 RIP=ffffffff8122e42a 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 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=00007f23831e7328 CR3=0000000005482000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 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=0000000000000001 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=00007fb099bf4fb0 CR3=000000000c7c8000 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=bc6c49c5bf44dbbd4d4b7e85665d8b83 XMM02=ec2efd57dc4c00df000000000011e610 XMM03=dcd7991ac1cdb568000000000011e6e0 XMM04=163a9c272e9ce21900000000000ae988 XMM05=59d5b690e0af863b0000000000136758 XMM06=70d064552bf8138b00000000001355c0 XMM07=e042d86d42eb936e0000000000126250 XMM08=dcd7991ac1cdb568000000000011e6e0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000