syzkaller login: [ 38.675089] sshd (212) used greatest stack depth: 24424 bytes left [ 38.677427] BUG: Bad rss-counter state mm:000000007631a418 type:MM_FILEPAGES val:33 [ 38.678689] BUG: Bad rss-counter state mm:000000007631a418 type:MM_ANONPAGES val:22 [ 38.837395] ================================================================== [ 38.838303] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.839249] Read of size 8 at addr ffff88800edca3f8 by task sshd/219 [ 38.840012] [ 38.840229] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.841152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.842118] Call Trace: [ 38.842450] [ 38.842747] dump_stack_lvl+0x91/0xf0 [ 38.843258] print_report+0xcc/0x620 [ 38.843736] ? __virt_addr_valid+0x102/0x340 [ 38.844287] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.844908] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.845528] kasan_report+0xbe/0xf0 [ 38.846009] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.846629] vma_interval_tree_remove+0xc75/0xec0 [ 38.847254] vma_prepare+0xc54/0x11a0 [ 38.847741] __split_vma+0x5af/0x950 [ 38.848208] ? __pfx___split_vma+0x10/0x10 [ 38.848733] ? find_held_lock+0x2c/0x110 [ 38.849250] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.849809] ? lock_is_held_type+0x9f/0x120 [ 38.850346] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.850951] ? mtree_range_walk+0x632/0x900 [ 38.851503] ? mas_walk+0x5c7/0x7c0 [ 38.851984] do_vmi_munmap+0x1f1/0x2b0 [ 38.852477] mmap_region+0x1f9/0x2660 [ 38.852954] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.853464] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.854168] ? __pfx_lock_acquire+0x10/0x10 [ 38.854694] ? __pfx_mmap_region+0x10/0x10 [ 38.855239] ? security_mmap_addr+0x7d/0xa0 [ 38.855778] ? get_unmapped_area+0x1f5/0x3f0 [ 38.856321] do_mmap+0x854/0xf00 [ 38.856756] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.857245] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.857804] ksys_mmap_pgoff+0x3af/0x500 [ 38.858307] do_syscall_64+0x3f/0x90 [ 38.858780] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.859429] RIP: 0033:0x7fb1097ecd82 [ 38.859889] 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 [ 38.861997] RSP: 002b:00007fff97e17fd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.862904] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb1097ecd82 [ 38.863757] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb108c26000 [ 38.864604] RBP: 00007fb108c26000 R08: 0000000000000009 R09: 0000000000001000 [ 38.865451] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae49652ec0 [ 38.866313] R13: 00007fff97e17ff0 R14: 00007fff97e18020 R15: 00007fff97e18380 [ 38.867181] [ 38.867475] [ 38.867691] Allocated by task 212: [ 38.868120] kasan_save_stack+0x22/0x50 [ 38.868624] kasan_set_track+0x25/0x30 [ 38.869115] __kasan_slab_alloc+0x59/0x70 [ 38.869638] kmem_cache_alloc+0x16b/0x370 [ 38.870158] vm_area_dup+0x20/0x160 [ 38.870607] __split_vma+0x170/0x950 [ 38.871075] split_vma+0xc6/0x110 [ 38.871514] mprotect_fixup+0x8d2/0xb30 [ 38.872092] do_mprotect_pkey+0x87e/0xd40 [ 38.872692] __x64_sys_mprotect+0x78/0xc0 [ 38.873320] do_syscall_64+0x3f/0x90 [ 38.873895] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.874691] [ 38.874971] Freed by task 203: [ 38.875445] kasan_save_stack+0x22/0x50 [ 38.876069] kasan_set_track+0x25/0x30 [ 38.876674] kasan_save_free_info+0x2b/0x50 [ 38.877331] __kasan_slab_free+0x10a/0x190 [ 38.877995] kmem_cache_free+0x10d/0x4d0 [ 38.878615] rcu_core+0x8c8/0x2860 [ 38.879167] __do_softirq+0x1b7/0x7d4 [ 38.879742] [ 38.879993] Last potentially related work creation: [ 38.880716] kasan_save_stack+0x22/0x50 [ 38.881317] __kasan_record_aux_stack+0x8e/0xa0 [ 38.882011] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.882799] remove_vma+0x139/0x170 [ 38.883360] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.884036] do_vmi_munmap+0x1f1/0x2b0 [ 38.884616] __vm_munmap+0x138/0x3a0 [ 38.885179] __x64_sys_munmap+0x59/0x80 [ 38.885776] do_syscall_64+0x3f/0x90 [ 38.886347] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.887145] [ 38.887400] The buggy address belongs to the object at ffff88800edca3a0 [ 38.887400] which belongs to the cache vm_area_struct of size 168 [ 38.889179] The buggy address is located 88 bytes inside of [ 38.889179] freed 168-byte region [ffff88800edca3a0, ffff88800edca448) [ 38.890911] [ 38.891185] The buggy address belongs to the physical page: [ 38.891984] page:00000000762cba2b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xedca [ 38.893291] memcg:ffff88800eb43a01 [ 38.893792] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.894570] page_type: 0xffffffff() [ 38.895131] raw: 0100000000000200 ffff8880087a0c80 ffffea0000319040 dead000000000004 [ 38.896235] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb43a01 [ 38.897323] page dumped because: kasan: bad access detected [ 38.898135] [ 38.898399] Memory state around the buggy address: [ 38.899109] ffff88800edca280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 38.900148] ffff88800edca300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 38.901170] >ffff88800edca380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 38.902205] ^ [ 38.903173] ffff88800edca400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 38.903970] ffff88800edca480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.904764] ================================================================== [ 38.905692] Disabling lock debugging due to kernel taint [ 41.221951] BUG: Bad rss-counter state mm:000000004375b377 type:MM_FILEPAGES val:33 [ 41.222974] BUG: Bad rss-counter state mm:000000004375b377 type:MM_ANONPAGES val:22 [ 41.665386] BUG: Bad rss-counter state mm:00000000e288cea1 type:MM_FILEPAGES val:33 [ 41.666611] BUG: Bad rss-counter state mm:00000000e288cea1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64932' (ECDSA) to the list of known hosts. 2023/06/20 18:30:11 fuzzer started 2023/06/20 18:30:11 dialing manager at localhost:36067 2023/06/20 18:30:11 checking machine... 2023/06/20 18:30:11 checking revisions... [ 42.390521] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:30:11 testing simple program... [ 42.444676] cgroup: Unknown subsys name 'net' [ 42.482718] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:30:11 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=ffffffff85dbd7fc RCX=ffffffff813ad71f RDX=0000000000000000 RSI=ffffffff860d8256 RDI=ffffffff85dbd7f8 RBP=ffffffff85dbd7f8 RSP=ffff888014247618 R8 =ffffffff860d8256 R9 =ffff888014247710 R10=0000000000038001 R11=0000000000010b8d R12=ffffffff85dbd800 R13=ffffffff85dbd7f8 R14=ffffffff85dbd7f8 R15=dffffc0000000000 RIP=ffffffff8112fc8c RFL=00000202 [-------] 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 00007f215fdb6900 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=00007fd5b79c9650 CR3=000000000eb94000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6ca375825631807a00000000000ae988 XMM05=1cca7cfe7ef5c0bf0000000000134318 XMM06=19e9129bd510f2350000000000133178 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffffffff0c7660a RBX=0000000000000001 RCX=ffffffff863b3050 RDX=0000000000000000 RSI=dffffc0000000000 RDI=ffff88806cf09b00 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =ffffffff863b3054 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=000000000008a88c R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff8880169c7d08 R15=ffff88806cf09a98 RIP=ffffffff81131118 RFL=00000217 [----APC] 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 00007fd5b7414900 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=00007fd5b79cb618 CR3=000000000fcbe000 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=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