syzkaller login: [ 38.615975] BUG: Bad rss-counter state mm:000000006082b81b type:MM_FILEPAGES val:33 [ 38.617204] BUG: Bad rss-counter state mm:000000006082b81b type:MM_ANONPAGES val:22 [ 38.780594] ================================================================== [ 38.781545] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.782514] Read of size 8 at addr ffff888009511228 by task sshd/219 [ 38.783451] [ 38.783714] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.784626] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.785666] Call Trace: [ 38.785998] [ 38.786307] dump_stack_lvl+0x91/0xf0 [ 38.786814] print_report+0xcc/0x620 [ 38.787317] ? __virt_addr_valid+0x102/0x340 [ 38.787906] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.788545] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.789170] kasan_report+0xbe/0xf0 [ 38.789656] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.790289] vma_interval_tree_remove+0xc75/0xec0 [ 38.790914] vma_prepare+0xc54/0x11a0 [ 38.791409] __split_vma+0x5af/0x950 [ 38.791905] ? __pfx___split_vma+0x10/0x10 [ 38.792452] ? find_held_lock+0x2c/0x110 [ 38.792993] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.793569] ? lock_is_held_type+0x9f/0x120 [ 38.794126] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.794758] ? mtree_range_walk+0x632/0x900 [ 38.795335] ? mas_walk+0x5c7/0x7c0 [ 38.795837] do_vmi_munmap+0x1f1/0x2b0 [ 38.796355] mmap_region+0x1f9/0x2660 [ 38.796853] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.797382] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.798118] ? __pfx_lock_acquire+0x10/0x10 [ 38.798675] ? __pfx_mmap_region+0x10/0x10 [ 38.799231] ? security_mmap_addr+0x7d/0xa0 [ 38.799804] ? get_unmapped_area+0x1f5/0x3f0 [ 38.800376] do_mmap+0x854/0xf00 [ 38.800835] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.801345] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.801922] ksys_mmap_pgoff+0x3af/0x500 [ 38.802453] do_syscall_64+0x3f/0x90 [ 38.802953] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.803623] RIP: 0033:0x7f2a8dda0d82 [ 38.804099] 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 [ 38.806304] RSP: 002b:00007fff63e72238 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.807254] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2a8dda0d82 [ 38.808152] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2a8d1da000 [ 38.809022] RBP: 00007f2a8d1da000 R08: 0000000000000009 R09: 0000000000001000 [ 38.809892] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c424319ec0 [ 38.810771] R13: 00007fff63e72250 R14: 00007fff63e72280 R15: 00007fff63e725e0 [ 38.811639] [ 38.811931] [ 38.812146] Allocated by task 212: [ 38.812576] kasan_save_stack+0x22/0x50 [ 38.813080] kasan_set_track+0x25/0x30 [ 38.813573] __kasan_slab_alloc+0x59/0x70 [ 38.814094] kmem_cache_alloc+0x16b/0x370 [ 38.814611] vm_area_dup+0x20/0x160 [ 38.815066] __split_vma+0x170/0x950 [ 38.815533] split_vma+0xc6/0x110 [ 38.815980] mprotect_fixup+0x8d2/0xb30 [ 38.816485] do_mprotect_pkey+0x87e/0xd40 [ 38.817011] __x64_sys_mprotect+0x78/0xc0 [ 38.817535] do_syscall_64+0x3f/0x90 [ 38.818012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.818659] [ 38.818873] Freed by task 210: [ 38.819269] kasan_save_stack+0x22/0x50 [ 38.819781] kasan_set_track+0x25/0x30 [ 38.820275] kasan_save_free_info+0x2b/0x50 [ 38.820809] __kasan_slab_free+0x10a/0x190 [ 38.821343] kmem_cache_free+0x10d/0x4d0 [ 38.821857] rcu_core+0x8c8/0x2860 [ 38.822302] __do_softirq+0x1b7/0x7d4 [ 38.822779] [ 38.822996] Last potentially related work creation: [ 38.823578] kasan_save_stack+0x22/0x50 [ 38.824143] __kasan_record_aux_stack+0x8e/0xa0 [ 38.824728] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.825375] remove_vma+0x139/0x170 [ 38.825826] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.826387] do_vmi_munmap+0x1f1/0x2b0 [ 38.826878] __vm_munmap+0x138/0x3a0 [ 38.827345] __x64_sys_munmap+0x59/0x80 [ 38.827869] do_syscall_64+0x3f/0x90 [ 38.828344] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.828990] [ 38.829207] Second to last potentially related work creation: [ 38.829896] kasan_save_stack+0x22/0x50 [ 38.830408] __kasan_record_aux_stack+0x8e/0xa0 [ 38.830979] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.831633] remove_vma+0x139/0x170 [ 38.832088] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.832649] do_vmi_munmap+0x1f1/0x2b0 [ 38.833139] mmap_region+0x1f9/0x2660 [ 38.833619] do_mmap+0x854/0xf00 [ 38.834049] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.834542] ksys_mmap_pgoff+0x3af/0x500 [ 38.835042] do_syscall_64+0x3f/0x90 [ 38.835520] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.836169] [ 38.836385] The buggy address belongs to the object at ffff8880095111d0 [ 38.836385] which belongs to the cache vm_area_struct of size 168 [ 38.837859] The buggy address is located 88 bytes inside of [ 38.837859] freed 168-byte region [ffff8880095111d0, ffff888009511278) [ 38.839248] [ 38.839461] The buggy address belongs to the physical page: [ 38.840134] page:000000007d588a14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9511 [ 38.841215] memcg:ffff88800e579901 [ 38.841636] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.842281] page_type: 0xffffffff() [ 38.842729] raw: 0100000000000200 ffff8880087a0c80 ffffea0000383dc0 dead000000000006 [ 38.843659] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e579901 [ 38.844558] page dumped because: kasan: bad access detected [ 38.845219] [ 38.845438] Memory state around the buggy address: [ 38.846021] ffff888009511100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.846886] ffff888009511180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.847756] >ffff888009511200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.848619] ^ [ 38.849193] ffff888009511280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 38.850056] ffff888009511300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 38.850930] ================================================================== [ 38.851879] Disabling lock debugging due to kernel taint [ 40.775584] BUG: Bad rss-counter state mm:00000000e725149b type:MM_FILEPAGES val:33 [ 40.776603] BUG: Bad rss-counter state mm:00000000e725149b type:MM_ANONPAGES val:22 [ 41.362209] BUG: Bad rss-counter state mm:0000000021959128 type:MM_FILEPAGES val:33 [ 41.363210] BUG: Bad rss-counter state mm:0000000021959128 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22230' (ECDSA) to the list of known hosts. 2023/06/20 17:22:52 fuzzer started 2023/06/20 17:22:53 dialing manager at localhost:36067 2023/06/20 17:22:53 checking machine... 2023/06/20 17:22:53 checking revisions... [ 41.991579] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:22:53 testing simple program... [ 42.036534] cgroup: Unknown subsys name 'net' [ 42.075144] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:22:52 Registers: info registers vcpu 0 RAX=ffff88806ce3ce10 RBX=ffff8880145adb40 RCX=ffff8880145adb40 RDX=0000000000800043 RSI=ffffea0000516b40 RDI=ffff8880084413c0 RBP=ffff888015c7f7f8 RSP=ffff888015c7f760 R8 =0000000000000001 R9 =ffffffff8181032f R10=ffffea0000516b40 R11=0000000080200018 R12=ffffea0000516b40 R13=ffff888015c7f848 R14=ffff8880084413c0 R15=ffff8880084413c0 RIP=ffffffff81809616 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fde69b14900 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=00007fde68f48440 CR3=0000000008c7a000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f4424c1c114f237a00000000000ae988 XMM05=9138840dc52210890000000000135840 XMM06=806171799158d9670000000000133cb8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=0000000000000100 RDX=ffff888008d951c0 RSI=ffffffff813b92f2 RDI=0000000000000004 RBP=00000000fffc0b2e RSP=ffff88806cf09df8 R8 =000000000000002e R9 =0000000000000040 R10=000000000000002f R11=0000001c10a90610 R12=000000000000002e R13=0000000000000000 R14=0000000000000040 R15=0000000000000006 RIP=ffffffff814c0860 RFL=00000002 [-------] 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=00007fa747779618 CR3=0000000016492000 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=2032353a32323a3731203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032353a32323a3731203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000