syzkaller login: [ 33.295040] BUG: Bad rss-counter state mm:00000000018e81ea type:MM_FILEPAGES val:33 [ 33.296600] BUG: Bad rss-counter state mm:00000000018e81ea type:MM_ANONPAGES val:22 [ 33.357091] ================================================================== [ 33.358525] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.359938] Read of size 8 at addr ffff88800ed7dc20 by task sshd/220 [ 33.361362] [ 33.361755] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.363089] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.364589] Call Trace: [ 33.365092] [ 33.365519] dump_stack_lvl+0x91/0xf0 [ 33.366251] print_report+0xcc/0x620 [ 33.366956] ? __virt_addr_valid+0x102/0x340 [ 33.367815] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.368886] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.369880] kasan_report+0xbe/0xf0 [ 33.370637] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.371638] vma_interval_tree_remove+0xc75/0xec0 [ 33.372657] vma_prepare+0xc54/0x11a0 [ 33.373435] __split_vma+0x5af/0x950 [ 33.374199] ? __pfx___split_vma+0x10/0x10 [ 33.375044] ? find_held_lock+0x2c/0x110 [ 33.375875] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.376693] ? lock_is_held_type+0x9f/0x120 [ 33.377498] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.378460] ? mtree_range_walk+0x632/0x900 [ 33.379361] ? mas_walk+0x5c7/0x7c0 [ 33.380146] do_vmi_munmap+0x1f1/0x2b0 [ 33.380960] mmap_region+0x1f9/0x2660 [ 33.381739] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.382563] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.383693] ? __pfx_lock_acquire+0x10/0x10 [ 33.384560] ? __pfx_mmap_region+0x10/0x10 [ 33.385415] ? security_mmap_addr+0x7d/0xa0 [ 33.386168] ? get_unmapped_area+0x1f5/0x3f0 [ 33.386965] do_mmap+0x854/0xf00 [ 33.387616] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.388403] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.389291] ksys_mmap_pgoff+0x3af/0x500 [ 33.390128] do_syscall_64+0x3f/0x90 [ 33.390925] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.391956] RIP: 0033:0x7efcaeadcd82 [ 33.392713] 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 [ 33.396086] RSP: 002b:00007fff2a70c508 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.397514] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efcaeadcd82 [ 33.398864] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efcadf16000 [ 33.400218] RBP: 00007efcadf16000 R08: 0000000000000009 R09: 0000000000001000 [ 33.401515] R10: 0000000000000812 R11: 0000000000000206 R12: 00005627bc020f70 [ 33.402818] R13: 00007fff2a70c520 R14: 00007fff2a70c550 R15: 00007fff2a70c8b0 [ 33.404165] [ 33.404578] [ 33.404884] Allocated by task 213: [ 33.405468] kasan_save_stack+0x22/0x50 [ 33.406188] kasan_set_track+0x25/0x30 [ 33.406894] __kasan_slab_alloc+0x59/0x70 [ 33.407642] kmem_cache_alloc+0x16b/0x370 [ 33.408391] vm_area_dup+0x20/0x160 [ 33.409029] __split_vma+0x170/0x950 [ 33.409705] split_vma+0xc6/0x110 [ 33.410333] mprotect_fixup+0x8d2/0xb30 [ 33.411081] do_mprotect_pkey+0x87e/0xd40 [ 33.411860] __x64_sys_mprotect+0x78/0xc0 [ 33.412608] do_syscall_64+0x3f/0x90 [ 33.413271] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.414218] [ 33.414528] Freed by task 213: [ 33.415124] kasan_save_stack+0x22/0x50 [ 33.415854] kasan_set_track+0x25/0x30 [ 33.416616] kasan_save_free_info+0x2b/0x50 [ 33.417419] __kasan_slab_free+0x10a/0x190 [ 33.418183] kmem_cache_free+0x10d/0x4d0 [ 33.418911] rcu_core+0x8c8/0x2860 [ 33.419561] __do_softirq+0x1b7/0x7d4 [ 33.420249] [ 33.420556] Last potentially related work creation: [ 33.421417] kasan_save_stack+0x22/0x50 [ 33.422176] __kasan_record_aux_stack+0x8e/0xa0 [ 33.422998] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.423938] remove_vma+0x139/0x170 [ 33.425045] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.425857] do_vmi_munmap+0x1f1/0x2b0 [ 33.426551] __vm_munmap+0x138/0x3a0 [ 33.427228] __x64_sys_munmap+0x59/0x80 [ 33.427940] do_syscall_64+0x3f/0x90 [ 33.428652] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.429591] [ 33.429895] Second to last potentially related work creation: [ 33.432167] kasan_save_stack+0x22/0x50 [ 33.433021] __kasan_record_aux_stack+0x8e/0xa0 [ 33.433936] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.434982] remove_vma+0x139/0x170 [ 33.435863] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.436984] do_vmi_munmap+0x1f1/0x2b0 [ 33.438260] mmap_region+0x1f9/0x2660 [ 33.439208] do_mmap+0x854/0xf00 [ 33.440001] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.440818] ksys_mmap_pgoff+0x3af/0x500 [ 33.441527] do_syscall_64+0x3f/0x90 [ 33.442210] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.443100] [ 33.443414] The buggy address belongs to the object at ffff88800ed7dbc8 [ 33.443414] which belongs to the cache vm_area_struct of size 168 [ 33.445462] The buggy address is located 88 bytes inside of [ 33.445462] freed 168-byte region [ffff88800ed7dbc8, ffff88800ed7dc70) [ 33.447357] [ 33.447659] The buggy address belongs to the physical page: [ 33.448597] page:0000000020b588cf refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed7d [ 33.450038] memcg:ffff888013f5ef01 [ 33.450624] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.451485] page_type: 0xffffffff() [ 33.452133] raw: 0100000000000200 ffff88800879fc80 ffffea000025e7c0 dead000000000004 [ 33.453443] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f5ef01 [ 33.454752] page dumped because: kasan: bad access detected [ 33.455630] [ 33.455913] Memory state around the buggy address: [ 33.456716] ffff88800ed7db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.457900] ffff88800ed7db80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.459106] >ffff88800ed7dc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.460295] ^ [ 33.461072] ffff88800ed7dc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.462189] ffff88800ed7dd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.463301] ================================================================== [ 33.465244] Disabling lock debugging due to kernel taint [ 35.793818] BUG: Bad rss-counter state mm:00000000adb4980d type:MM_FILEPAGES val:33 [ 35.794480] BUG: Bad rss-counter state mm:00000000adb4980d type:MM_ANONPAGES val:22 [ 36.163063] BUG: Bad rss-counter state mm:00000000d052b943 type:MM_FILEPAGES val:33 [ 36.164285] BUG: Bad rss-counter state mm:00000000d052b943 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56989' (ECDSA) to the list of known hosts. 2023/06/20 00:05:59 fuzzer started 2023/06/20 00:06:00 dialing manager at localhost:44161 2023/06/20 00:06:00 checking machine... 2023/06/20 00:06:00 checking revisions... [ 36.831428] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:06:00 testing simple program... [ 36.874266] cgroup: Unknown subsys name 'net' [ 36.924703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:05:58 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007fff0a794b48 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=00007f87392f751000005641fc1ec790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea0000596200 RCX=0000000000000000 RDX=0000000000001000 RSI=ffffea0000596200 RDI=ffff88801838fcf8 RBP=0000000000000000 RSP=ffff88801838f940 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffff R13=00007f91f2cfe000 R14=ffff88801b66e7e8 R15=dffffc0000000000 RIP=ffffffff817496f4 RFL=00000286 [--S--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 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=00007f91f300f328 CR3=000000000ecae000 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=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