syzkaller login: [ 32.448767] BUG: Bad rss-counter state mm:000000000e3d6767 type:MM_FILEPAGES val:33 [ 32.450027] BUG: Bad rss-counter state mm:000000000e3d6767 type:MM_ANONPAGES val:22 [ 32.485007] ================================================================== [ 32.486315] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.487706] Read of size 8 at addr ffff88800efdb058 by task sshd/219 [ 32.488803] [ 32.489151] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.490420] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.491638] Call Trace: [ 32.492028] [ 32.492327] dump_stack_lvl+0x91/0xf0 [ 32.492969] print_report+0xcc/0x620 [ 32.493488] ? __virt_addr_valid+0x102/0x340 [ 32.494075] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.494832] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.495505] kasan_report+0xbe/0xf0 [ 32.496022] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.496781] vma_interval_tree_remove+0xc75/0xec0 [ 32.497456] vma_prepare+0xc54/0x11a0 [ 32.497963] __split_vma+0x5af/0x950 [ 32.498446] ? __pfx___split_vma+0x10/0x10 [ 32.499131] ? find_held_lock+0x2c/0x110 [ 32.499673] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.500258] ? lock_is_held_type+0x9f/0x120 [ 32.500821] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.501470] ? mtree_range_walk+0x632/0x900 [ 32.502083] ? mas_walk+0x5c7/0x7c0 [ 32.502611] do_vmi_munmap+0x1f1/0x2b0 [ 32.503151] mmap_region+0x1f9/0x2660 [ 32.503651] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.504177] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.504919] ? __pfx_lock_acquire+0x10/0x10 [ 32.505467] ? __pfx_mmap_region+0x10/0x10 [ 32.506006] ? security_mmap_addr+0x7d/0xa0 [ 32.506553] ? get_unmapped_area+0x1f5/0x3f0 [ 32.507118] do_mmap+0x854/0xf00 [ 32.507562] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.508056] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.508649] ksys_mmap_pgoff+0x3af/0x500 [ 32.509174] do_syscall_64+0x3f/0x90 [ 32.509660] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.510323] RIP: 0033:0x7fd0cfedcd82 [ 32.510790] 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 [ 32.512969] RSP: 002b:00007ffeb6ff4318 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.513880] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0cfedcd82 [ 32.514752] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0cf316000 [ 32.515623] RBP: 00007fd0cf316000 R08: 0000000000000009 R09: 0000000000001000 [ 32.516488] R10: 0000000000000812 R11: 0000000000000206 R12: 00005561987a4ec0 [ 32.517380] R13: 00007ffeb6ff4330 R14: 00007ffeb6ff4360 R15: 00007ffeb6ff46c0 [ 32.518256] [ 32.518551] [ 32.518775] Allocated by task 212: [ 32.519213] kasan_save_stack+0x22/0x50 [ 32.519727] kasan_set_track+0x25/0x30 [ 32.520222] __kasan_slab_alloc+0x59/0x70 [ 32.520757] kmem_cache_alloc+0x16b/0x370 [ 32.521293] vm_area_dup+0x20/0x160 [ 32.521856] __split_vma+0x170/0x950 [ 32.522333] split_vma+0xc6/0x110 [ 32.522771] mprotect_fixup+0x8d2/0xb30 [ 32.523272] do_mprotect_pkey+0x87e/0xd40 [ 32.523806] __x64_sys_mprotect+0x78/0xc0 [ 32.524341] do_syscall_64+0x3f/0x90 [ 32.524835] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.525491] [ 32.525716] Freed by task 202: [ 32.526117] kasan_save_stack+0x22/0x50 [ 32.526631] kasan_set_track+0x25/0x30 [ 32.527130] kasan_save_free_info+0x2b/0x50 [ 32.527667] __kasan_slab_free+0x10a/0x190 [ 32.528214] kmem_cache_free+0x10d/0x4d0 [ 32.528727] rcu_core+0x8c8/0x2860 [ 32.529173] __do_softirq+0x1b7/0x7d4 [ 32.529656] [ 32.529881] Last potentially related work creation: [ 32.530487] kasan_save_stack+0x22/0x50 [ 32.531067] __kasan_record_aux_stack+0x8e/0xa0 [ 32.531751] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.532555] remove_vma+0x139/0x170 [ 32.533122] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.533817] do_vmi_munmap+0x1f1/0x2b0 [ 32.534419] __vm_munmap+0x138/0x3a0 [ 32.534990] __x64_sys_munmap+0x59/0x80 [ 32.535538] do_syscall_64+0x3f/0x90 [ 32.536063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.536748] [ 32.536970] The buggy address belongs to the object at ffff88800efdb000 [ 32.536970] which belongs to the cache vm_area_struct of size 168 [ 32.538464] The buggy address is located 88 bytes inside of [ 32.538464] freed 168-byte region [ffff88800efdb000, ffff88800efdb0a8) [ 32.539878] [ 32.540097] The buggy address belongs to the physical page: [ 32.540775] page:00000000d3932b95 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefdb [ 32.541872] memcg:ffff888016fbe901 [ 32.542311] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.542958] page_type: 0xffffffff() [ 32.543412] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.544366] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016fbe901 [ 32.545300] page dumped because: kasan: bad access detected [ 32.545975] [ 32.546197] Memory state around the buggy address: [ 32.546786] ffff88800efdaf00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.547848] ffff88800efdaf80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.548779] >ffff88800efdb000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.549650] ^ [ 32.550389] ffff88800efdb080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.551250] ffff88800efdb100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.552134] ================================================================== [ 32.553088] Disabling lock debugging due to kernel taint [ 34.862013] BUG: Bad rss-counter state mm:0000000026e12f3f type:MM_FILEPAGES val:33 [ 34.863184] BUG: Bad rss-counter state mm:0000000026e12f3f type:MM_ANONPAGES val:22 [ 35.402015] BUG: Bad rss-counter state mm:00000000b809d88e type:MM_FILEPAGES val:33 [ 35.403211] BUG: Bad rss-counter state mm:00000000b809d88e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11467' (ECDSA) to the list of known hosts. 2023/06/19 22:06:09 fuzzer started 2023/06/19 22:06:09 dialing manager at localhost:44161 2023/06/19 22:06:09 checking machine... 2023/06/19 22:06:09 checking revisions... [ 36.047280] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:06:09 testing simple program... [ 36.101699] cgroup: Unknown subsys name 'net' [ 36.163613] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:06:07 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff86137004 RDX=0000000000000000 RSI=0000000000000001 RDI=0000000000000001 RBP=ffff88800f0f75d8 RSP=ffff88800f0f7510 R8 =ffffffff86137008 R9 =ffff88800f0f75c0 R10=0000000000038001 R11=0000000000020cb4 R12=ffff88800f0f75e0 R13=ffff88800f0f75c8 R14=ffff88800f0f7980 R15=ffff88800f0f7580 RIP=ffffffff81130bd6 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 00007fafcfd19900 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=00007fafd02d0618 CR3=00000000159b4000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f43a47999e0 CR3=000000000e2aa000 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=2039303a36303a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a36303a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000