syzkaller login: [ 30.323171] BUG: Bad rss-counter state mm:0000000047e229fc type:MM_FILEPAGES val:33 [ 30.324550] BUG: Bad rss-counter state mm:0000000047e229fc type:MM_ANONPAGES val:22 [ 30.473078] ================================================================== [ 30.474095] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.475285] Read of size 8 at addr ffff88800e279140 by task sshd/219 [ 30.476181] [ 30.476438] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.477426] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.478546] Call Trace: [ 30.478898] [ 30.479212] dump_stack_lvl+0x91/0xf0 [ 30.479790] print_report+0xcc/0x620 [ 30.480323] ? __virt_addr_valid+0x102/0x340 [ 30.480951] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.481677] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.482360] kasan_report+0xbe/0xf0 [ 30.482906] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.483618] vma_interval_tree_remove+0xc75/0xec0 [ 30.484299] vma_prepare+0xc54/0x11a0 [ 30.484842] __split_vma+0x5af/0x950 [ 30.485374] ? __pfx___split_vma+0x10/0x10 [ 30.485983] ? find_held_lock+0x2c/0x110 [ 30.486578] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.487203] ? lock_is_held_type+0x9f/0x120 [ 30.487829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.488518] ? mtree_range_walk+0x632/0x900 [ 30.489147] ? mas_walk+0x5c7/0x7c0 [ 30.489690] do_vmi_munmap+0x1f1/0x2b0 [ 30.490240] mmap_region+0x1f9/0x2660 [ 30.490783] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.491347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.492156] ? __pfx_lock_acquire+0x10/0x10 [ 30.492760] ? __pfx_mmap_region+0x10/0x10 [ 30.493379] ? security_mmap_addr+0x7d/0xa0 [ 30.493985] ? get_unmapped_area+0x1f5/0x3f0 [ 30.494616] do_mmap+0x854/0xf00 [ 30.495101] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.495685] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.496319] ksys_mmap_pgoff+0x3af/0x500 [ 30.496898] do_syscall_64+0x3f/0x90 [ 30.497467] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.498193] RIP: 0033:0x7f7c07072d82 [ 30.498755] 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 [ 30.501165] RSP: 002b:00007ffcfeb1ad78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.502175] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7c07072d82 [ 30.503129] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7c064ac000 [ 30.504103] RBP: 00007f7c064ac000 R08: 0000000000000009 R09: 0000000000001000 [ 30.505081] R10: 0000000000000812 R11: 0000000000000206 R12: 000056356f9aeec0 [ 30.506048] R13: 00007ffcfeb1ad90 R14: 00007ffcfeb1adc0 R15: 00007ffcfeb1b120 [ 30.507019] [ 30.507349] [ 30.507618] Allocated by task 212: [ 30.508111] kasan_save_stack+0x22/0x50 [ 30.508704] kasan_set_track+0x25/0x30 [ 30.509280] __kasan_slab_alloc+0x59/0x70 [ 30.509893] kmem_cache_alloc+0x16b/0x370 [ 30.510495] vm_area_dup+0x20/0x160 [ 30.511012] __split_vma+0x170/0x950 [ 30.511577] split_vma+0xc6/0x110 [ 30.512071] mprotect_fixup+0x8d2/0xb30 [ 30.512659] do_mprotect_pkey+0x87e/0xd40 [ 30.513266] __x64_sys_mprotect+0x78/0xc0 [ 30.513878] do_syscall_64+0x3f/0x90 [ 30.514436] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.515161] [ 30.515422] Freed by task 212: [ 30.515886] kasan_save_stack+0x22/0x50 [ 30.516474] kasan_set_track+0x25/0x30 [ 30.517059] kasan_save_free_info+0x2b/0x50 [ 30.517677] __kasan_slab_free+0x10a/0x190 [ 30.518277] kmem_cache_free+0x10d/0x4d0 [ 30.518867] rcu_core+0x8c8/0x2860 [ 30.519379] __do_softirq+0x1b7/0x7d4 [ 30.519952] [ 30.520200] Last potentially related work creation: [ 30.520882] kasan_save_stack+0x22/0x50 [ 30.521490] __kasan_record_aux_stack+0x8e/0xa0 [ 30.522144] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.522894] remove_vma+0x139/0x170 [ 30.523430] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.524078] do_vmi_munmap+0x1f1/0x2b0 [ 30.524646] __vm_munmap+0x138/0x3a0 [ 30.525193] __x64_sys_munmap+0x59/0x80 [ 30.525785] do_syscall_64+0x3f/0x90 [ 30.526324] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.527068] [ 30.527315] Second to last potentially related work creation: [ 30.528116] kasan_save_stack+0x22/0x50 [ 30.528703] __kasan_record_aux_stack+0x8e/0xa0 [ 30.529388] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.530135] remove_vma+0x139/0x170 [ 30.530669] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.531308] do_vmi_munmap+0x1f1/0x2b0 [ 30.531891] mmap_region+0x1f9/0x2660 [ 30.532459] do_mmap+0x854/0xf00 [ 30.532945] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.533561] ksys_mmap_pgoff+0x3af/0x500 [ 30.534299] do_syscall_64+0x3f/0x90 [ 30.534858] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.535621] [ 30.535868] The buggy address belongs to the object at ffff88800e2790e8 [ 30.535868] which belongs to the cache vm_area_struct of size 168 [ 30.537586] The buggy address is located 88 bytes inside of [ 30.537586] freed 168-byte region [ffff88800e2790e8, ffff88800e279190) [ 30.539204] [ 30.539481] The buggy address belongs to the physical page: [ 30.540230] page:00000000c962a445 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe279 [ 30.541515] memcg:ffff88800e26b101 [ 30.541998] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.542808] page_type: 0xffffffff() [ 30.543327] raw: 0100000000000200 ffff8880087a0c80 ffffea0000388ec0 dead000000000005 [ 30.544409] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e26b101 [ 30.545489] page dumped because: kasan: bad access detected [ 30.546250] [ 30.546508] Memory state around the buggy address: [ 30.547170] ffff88800e279000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.548172] ffff88800e279080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 30.549177] >ffff88800e279100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.550160] ^ [ 30.550908] ffff88800e279180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.551913] ffff88800e279200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.552829] ================================================================== [ 30.553893] Disabling lock debugging due to kernel taint [ 32.460499] BUG: Bad rss-counter state mm:00000000fb63e13f type:MM_FILEPAGES val:33 [ 32.461959] BUG: Bad rss-counter state mm:00000000fb63e13f type:MM_ANONPAGES val:22 [ 32.942409] BUG: Bad rss-counter state mm:00000000632a2ff9 type:MM_FILEPAGES val:33 [ 32.943477] BUG: Bad rss-counter state mm:00000000632a2ff9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7338' (ECDSA) to the list of known hosts. 2023/06/20 23:41:52 fuzzer started 2023/06/20 23:41:52 dialing manager at localhost:36067 2023/06/20 23:41:52 checking machine... 2023/06/20 23:41:52 checking revisions... [ 33.654796] kmemleak: Automatic memory scanning thread ended 2023/06/20 23:41:52 testing simple program... [ 33.695142] cgroup: Unknown subsys name 'net' [ 33.737684] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:41:52 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fff40ab5398 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=00007f705b81d5100000559b64ba9790 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=ffff88800db60000 RBX=00007ffd7ae775c8 RCX=ffffffff864bbb54 RDX=1ffff11001b6bdf5 RSI=0000000000000000 RDI=ffff88800db5efa8 RBP=ffff88800db58000 RSP=ffff88800db5ef28 R8 =ffffffff864bbb58 R9 =ffff88800db5efd8 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88800db5ff58 R13=ffff88800db5efe0 R14=ffff88800db5ff58 R15=ffff88800db5ef98 RIP=ffffffff8113128d 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 00007f0de84e1900 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=00007f0de84c0020 CR3=000000000ee7e000 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