[ 25.520726] sshd (212) used greatest stack depth: 23992 bytes left [ 25.523126] BUG: Bad rss-counter state mm:000000008d510c20 type:MM_FILEPAGES val:33 [ 25.524128] BUG: Bad rss-counter state mm:000000008d510c20 type:MM_ANONPAGES val:22 [ 25.677671] ================================================================== [ 25.678778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.679715] Read of size 8 at addr ffff88800e4a7310 by task sshd/219 [ 25.680662] [ 25.680901] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.681770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.682789] Call Trace: [ 25.683109] [ 25.683390] dump_stack_lvl+0x91/0xf0 [ 25.683875] print_report+0xcc/0x620 [ 25.684360] ? __virt_addr_valid+0x102/0x340 [ 25.684915] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.685531] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.686177] kasan_report+0xbe/0xf0 [ 25.686653] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.687278] vma_interval_tree_remove+0xc75/0xec0 [ 25.687873] vma_prepare+0xc54/0x11a0 [ 25.688354] __split_vma+0x5af/0x950 [ 25.688837] ? __pfx___split_vma+0x10/0x10 [ 25.689383] ? find_held_lock+0x2c/0x110 [ 25.689929] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.690499] ? lock_is_held_type+0x9f/0x120 [ 25.691034] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.691652] ? mtree_range_walk+0x632/0x900 [ 25.692199] ? mas_walk+0x5c7/0x7c0 [ 25.692686] do_vmi_munmap+0x1f1/0x2b0 [ 25.693167] mmap_region+0x1f9/0x2660 [ 25.693647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.694172] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.694879] ? __pfx_lock_acquire+0x10/0x10 [ 25.695405] ? __pfx_mmap_region+0x10/0x10 [ 25.695921] ? security_mmap_addr+0x7d/0xa0 [ 25.696453] ? get_unmapped_area+0x1f5/0x3f0 [ 25.697008] do_mmap+0x854/0xf00 [ 25.697445] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.697953] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.698517] ksys_mmap_pgoff+0x3af/0x500 [ 25.699026] do_syscall_64+0x3f/0x90 [ 25.699500] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.700137] RIP: 0033:0x7f3578ebcd82 [ 25.700589] 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 [ 25.702709] RSP: 002b:00007ffc21393c08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.703631] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3578ebcd82 [ 25.704478] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f35782f6000 [ 25.705325] RBP: 00007f35782f6000 R08: 0000000000000009 R09: 0000000000001000 [ 25.706178] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555abab92ec0 [ 25.707020] R13: 00007ffc21393c20 R14: 00007ffc21393c50 R15: 00007ffc21393fb0 [ 25.707875] [ 25.708171] [ 25.708386] Allocated by task 212: [ 25.708815] kasan_save_stack+0x22/0x50 [ 25.709315] kasan_set_track+0x25/0x30 [ 25.709802] __kasan_slab_alloc+0x59/0x70 [ 25.710340] kmem_cache_alloc+0x16b/0x370 [ 25.710856] vm_area_dup+0x20/0x160 [ 25.711305] __split_vma+0x170/0x950 [ 25.711769] split_vma+0xc6/0x110 [ 25.712206] mprotect_fixup+0x8d2/0xb30 [ 25.712737] do_mprotect_pkey+0x87e/0xd40 [ 25.713270] __x64_sys_mprotect+0x78/0xc0 [ 25.713816] do_syscall_64+0x3f/0x90 [ 25.714334] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.714982] [ 25.715205] Freed by task 212: [ 25.715600] kasan_save_stack+0x22/0x50 [ 25.716107] kasan_set_track+0x25/0x30 [ 25.716600] kasan_save_free_info+0x2b/0x50 [ 25.717133] __kasan_slab_free+0x10a/0x190 [ 25.717666] kmem_cache_free+0x10d/0x4d0 [ 25.718187] rcu_core+0x8c8/0x2860 [ 25.718634] __do_softirq+0x1b7/0x7d4 [ 25.719115] [ 25.719330] Last potentially related work creation: [ 25.719934] kasan_save_stack+0x22/0x50 [ 25.720443] __kasan_record_aux_stack+0x8e/0xa0 [ 25.721022] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.721702] remove_vma+0x139/0x170 [ 25.722192] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.722763] do_vmi_munmap+0x1f1/0x2b0 [ 25.723249] __vm_munmap+0x138/0x3a0 [ 25.723724] __x64_sys_munmap+0x59/0x80 [ 25.724221] do_syscall_64+0x3f/0x90 [ 25.724696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.725354] [ 25.725569] Second to last potentially related work creation: [ 25.726269] kasan_save_stack+0x22/0x50 [ 25.726774] __kasan_record_aux_stack+0x8e/0xa0 [ 25.727363] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.728013] remove_vma+0x139/0x170 [ 25.728476] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.729036] do_vmi_munmap+0x1f1/0x2b0 [ 25.729531] mmap_region+0x1f9/0x2660 [ 25.730035] do_mmap+0x854/0xf00 [ 25.730470] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.730959] ksys_mmap_pgoff+0x3af/0x500 [ 25.731464] do_syscall_64+0x3f/0x90 [ 25.731942] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.732587] [ 25.732807] The buggy address belongs to the object at ffff88800e4a72b8 [ 25.732807] which belongs to the cache vm_area_struct of size 168 [ 25.734312] The buggy address is located 88 bytes inside of [ 25.734312] freed 168-byte region [ffff88800e4a72b8, ffff88800e4a7360) [ 25.735732] [ 25.735952] The buggy address belongs to the physical page: [ 25.736610] page:000000009bab0535 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe4a7 [ 25.737697] memcg:ffff88800d824101 [ 25.738143] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.738848] page_type: 0xffffffff() [ 25.739308] raw: 0100000000000200 ffff88800879fc80 ffffea00004051c0 dead000000000003 [ 25.740235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d824101 [ 25.741146] page dumped because: kasan: bad access detected [ 25.741809] [ 25.742048] Memory state around the buggy address: [ 25.742635] ffff88800e4a7200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 25.743502] ffff88800e4a7280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 25.744357] >ffff88800e4a7300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 25.745212] ^ [ 25.745682] ffff88800e4a7380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 25.746550] ffff88800e4a7400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 25.747411] ================================================================== [ 25.748361] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.544588] BUG: Bad rss-counter state mm:00000000f30240c1 type:MM_FILEPAGES val:33 [ 27.545376] BUG: Bad rss-counter state mm:00000000f30240c1 type:MM_ANONPAGES val:22 [ 28.058748] BUG: Bad rss-counter state mm:0000000091dc6688 type:MM_FILEPAGES val:33 [ 28.059786] BUG: Bad rss-counter state mm:0000000091dc6688 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61149' (ECDSA) to the list of known hosts. 2023/06/19 19:00:18 fuzzer started 2023/06/19 19:00:18 dialing manager at localhost:44161 2023/06/19 19:00:18 checking machine... 2023/06/19 19:00:18 checking revisions... [ 28.738105] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:00:19 testing simple program... [ 28.786956] cgroup: Unknown subsys name 'net' [ 28.887820] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:16 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=ffff888008c58000 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=00007fff26672ff8 CR3=000000001452c000 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=2038313a30303a3931203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a30303a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000004 RCX=ffffffff81f06085 RDX=ffff88801796d1c0 RSI=000000000000000f RDI=0000000000000005 RBP=ffffffff849c0940 RSP=ffff88800f22fd10 R8 =0000000000000005 R9 =000000000000000a R10=0000000000000010 R11=0000000000000000 R12=0000000000000010 R13=0000000000000005 R14=0000000000000007 R15=ffff88801796d1c0 RIP=ffffffff814c0420 RFL=00000206 [-----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 00007fa8a6814900 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=00007ffd50c19000 CR3=0000000017a9c000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000