syzkaller login: [ 30.466722] BUG: Bad rss-counter state mm:0000000087936683 type:MM_FILEPAGES val:33 [ 30.468725] BUG: Bad rss-counter state mm:0000000087936683 type:MM_ANONPAGES val:22 [ 30.639405] ================================================================== [ 30.640500] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.641787] Read of size 8 at addr ffff88800d5033f8 by task sshd/218 [ 30.642608] [ 30.642841] CPU: 0 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.643778] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.644810] Call Trace: [ 30.645151] [ 30.645466] dump_stack_lvl+0x91/0xf0 [ 30.645990] print_report+0xcc/0x620 [ 30.646512] ? __virt_addr_valid+0x102/0x340 [ 30.647104] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.647777] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.648433] kasan_report+0xbe/0xf0 [ 30.648942] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.649625] vma_interval_tree_remove+0xc75/0xec0 [ 30.650262] vma_prepare+0xc54/0x11a0 [ 30.650772] __split_vma+0x5af/0x950 [ 30.651275] ? __pfx___split_vma+0x10/0x10 [ 30.651843] ? find_held_lock+0x2c/0x110 [ 30.652395] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.652994] ? lock_is_held_type+0x9f/0x120 [ 30.653577] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.654223] ? mtree_range_walk+0x632/0x900 [ 30.654814] ? mas_walk+0x5c7/0x7c0 [ 30.655317] do_vmi_munmap+0x1f1/0x2b0 [ 30.655840] mmap_region+0x1f9/0x2660 [ 30.656382] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.656947] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.657726] ? __pfx_lock_acquire+0x10/0x10 [ 30.658285] ? __pfx_mmap_region+0x10/0x10 [ 30.658849] ? security_mmap_addr+0x7d/0xa0 [ 30.659414] ? get_unmapped_area+0x1f5/0x3f0 [ 30.660003] do_mmap+0x854/0xf00 [ 30.660469] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.660989] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.661598] ksys_mmap_pgoff+0x3af/0x500 [ 30.662149] do_syscall_64+0x3f/0x90 [ 30.662662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.663366] RIP: 0033:0x7f114a71ed82 [ 30.663864] 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 [ 30.666148] RSP: 002b:00007ffd9cf6d4b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.667104] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f114a71ed82 [ 30.668010] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1149b58000 [ 30.668930] RBP: 00007f1149b58000 R08: 0000000000000009 R09: 0000000000001000 [ 30.669845] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563c8403e980 [ 30.670760] R13: 00007ffd9cf6d4d0 R14: 00007ffd9cf6d500 R15: 00007ffd9cf6d860 [ 30.671655] [ 30.671964] [ 30.672189] Allocated by task 211: [ 30.672641] kasan_save_stack+0x22/0x50 [ 30.673175] kasan_set_track+0x25/0x30 [ 30.673714] __kasan_slab_alloc+0x59/0x70 [ 30.674267] kmem_cache_alloc+0x16b/0x370 [ 30.674812] vm_area_dup+0x20/0x160 [ 30.675320] __split_vma+0x170/0x950 [ 30.675822] split_vma+0xc6/0x110 [ 30.676294] mprotect_fixup+0x8d2/0xb30 [ 30.676844] do_mprotect_pkey+0x87e/0xd40 [ 30.677419] __x64_sys_mprotect+0x78/0xc0 [ 30.677978] do_syscall_64+0x3f/0x90 [ 30.678492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.679167] [ 30.679397] Freed by task 211: [ 30.679811] kasan_save_stack+0x22/0x50 [ 30.680337] kasan_set_track+0x25/0x30 [ 30.680859] kasan_save_free_info+0x2b/0x50 [ 30.681421] __kasan_slab_free+0x10a/0x190 [ 30.681982] kmem_cache_free+0x10d/0x4d0 [ 30.682519] rcu_core+0x8c8/0x2860 [ 30.682992] __do_softirq+0x1b7/0x7d4 [ 30.683485] [ 30.683711] Last potentially related work creation: [ 30.684332] kasan_save_stack+0x22/0x50 [ 30.684869] __kasan_record_aux_stack+0x8e/0xa0 [ 30.685478] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.686148] remove_vma+0x139/0x170 [ 30.686622] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.687202] do_vmi_munmap+0x1f1/0x2b0 [ 30.687709] __vm_munmap+0x138/0x3a0 [ 30.688194] __x64_sys_munmap+0x59/0x80 [ 30.688711] do_syscall_64+0x3f/0x90 [ 30.689212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.689887] [ 30.690111] Second to last potentially related work creation: [ 30.690811] kasan_save_stack+0x22/0x50 [ 30.691340] __kasan_record_aux_stack+0x8e/0xa0 [ 30.691937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692604] remove_vma+0x139/0x170 [ 30.693076] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693654] do_vmi_munmap+0x1f1/0x2b0 [ 30.694161] mmap_region+0x1f9/0x2660 [ 30.694662] do_mmap+0x854/0xf00 [ 30.695116] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.695618] ksys_mmap_pgoff+0x3af/0x500 [ 30.696142] do_syscall_64+0x3f/0x90 [ 30.696642] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.697321] [ 30.697544] The buggy address belongs to the object at ffff88800d5033a0 [ 30.697544] which belongs to the cache vm_area_struct of size 168 [ 30.699058] The buggy address is located 88 bytes inside of [ 30.699058] freed 168-byte region [ffff88800d5033a0, ffff88800d503448) [ 30.700496] [ 30.700723] The buggy address belongs to the physical page: [ 30.701399] page:000000000580574c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd503 [ 30.702512] memcg:ffff88800c4c7d01 [ 30.702958] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.703619] page_type: 0xffffffff() [ 30.704088] raw: 0100000000000200 ffff88800879fc80 ffffea000038edc0 dead000000000004 [ 30.705034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c4c7d01 [ 30.705975] page dumped because: kasan: bad access detected [ 30.706654] [ 30.706879] Memory state around the buggy address: [ 30.707485] ffff88800d503280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.708402] ffff88800d503300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.709334] >ffff88800d503380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.710242] ^ [ 30.711149] ffff88800d503400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.712060] ffff88800d503480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.712966] ================================================================== [ 30.714104] Disabling lock debugging due to kernel taint [ 32.538488] BUG: Bad rss-counter state mm:000000000b24b7e8 type:MM_FILEPAGES val:33 [ 32.539582] BUG: Bad rss-counter state mm:000000000b24b7e8 type:MM_ANONPAGES val:22 [ 32.994675] BUG: Bad rss-counter state mm:00000000cdc650d8 type:MM_FILEPAGES val:33 [ 32.995611] BUG: Bad rss-counter state mm:00000000cdc650d8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2828' (ECDSA) to the list of known hosts. 2023/06/19 23:47:51 fuzzer started 2023/06/19 23:47:51 dialing manager at localhost:44161 2023/06/19 23:47:51 checking machine... 2023/06/19 23:47:51 checking revisions... [ 33.706899] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:47:51 testing simple program... [ 33.756957] cgroup: Unknown subsys name 'net' [ 33.813065] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:47:50 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007fca8b03b000 RCX=0000000000000000 RDX=ffff88800f6eb680 RSI=ffffffff844a3182 RDI=0000000000000001 RBP=ffff888016770600 RSP=ffff888015fefb20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000006 R11=00000000000b6996 R12=0000000000000006 R13=dffffc0000000000 R14=0000000000000000 R15=ffff888015fefe70 RIP=ffffffff844a3186 RFL=00000293 [--S-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 00007fca8b071900 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=00007fca8b040008 CR3=0000000018c2c000 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=0000000000038000 RBX=0000000000000002 RCX=ffffffff813ad6cf RDX=dffffc0000000000 RSI=0000000000003ad6 RDI=ffff88806cf09a78 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =0000000000000001 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff88806cf09ab9 R15=ffff88806cf09a78 RIP=ffffffff81130754 RFL=00000283 [--S---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 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=00007f4b3a6e9bf0 CR3=00000000102a8000 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=2030353a37343a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030353a37343a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000