syzkaller login: [ 30.190452] BUG: Bad rss-counter state mm:000000005b2399b5 type:MM_FILEPAGES val:33 [ 30.191744] BUG: Bad rss-counter state mm:000000005b2399b5 type:MM_ANONPAGES val:22 [ 30.338094] ================================================================== [ 30.339023] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.340016] Read of size 8 at addr ffff88800d472140 by task sshd/221 [ 30.340811] [ 30.341088] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.342210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.343215] Call Trace: [ 30.343553] [ 30.343839] dump_stack_lvl+0x91/0xf0 [ 30.344349] print_report+0xcc/0x620 [ 30.344877] ? __virt_addr_valid+0x102/0x340 [ 30.345439] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346086] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.346720] kasan_report+0xbe/0xf0 [ 30.347216] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.347848] vma_interval_tree_remove+0xc75/0xec0 [ 30.348477] vma_prepare+0xc54/0x11a0 [ 30.348991] __split_vma+0x5af/0x950 [ 30.349467] ? __pfx___split_vma+0x10/0x10 [ 30.350019] ? find_held_lock+0x2c/0x110 [ 30.350553] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.351139] ? lock_is_held_type+0x9f/0x120 [ 30.351693] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.352330] ? mtree_range_walk+0x632/0x900 [ 30.352931] ? mas_walk+0x5c7/0x7c0 [ 30.353418] do_vmi_munmap+0x1f1/0x2b0 [ 30.353932] mmap_region+0x1f9/0x2660 [ 30.354421] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.354954] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.355671] ? __pfx_lock_acquire+0x10/0x10 [ 30.356224] ? __pfx_mmap_region+0x10/0x10 [ 30.356776] ? security_mmap_addr+0x7d/0xa0 [ 30.357327] ? get_unmapped_area+0x1f5/0x3f0 [ 30.357890] do_mmap+0x854/0xf00 [ 30.358329] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.358827] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.359405] ksys_mmap_pgoff+0x3af/0x500 [ 30.359941] do_syscall_64+0x3f/0x90 [ 30.360438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.361115] RIP: 0033:0x7fd61d345d82 [ 30.361574] 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 [ 30.363727] RSP: 002b:00007ffc44c48ef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.364666] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd61d345d82 [ 30.365532] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd61c77f000 [ 30.366386] RBP: 00007fd61c77f000 R08: 0000000000000009 R09: 0000000000001000 [ 30.367247] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555b8c5f6f60 [ 30.368106] R13: 00007ffc44c48f10 R14: 00007ffc44c48f40 R15: 00007ffc44c492a0 [ 30.369003] [ 30.369297] [ 30.369517] Allocated by task 214: [ 30.369953] kasan_save_stack+0x22/0x50 [ 30.370458] kasan_set_track+0x25/0x30 [ 30.370967] __kasan_slab_alloc+0x59/0x70 [ 30.371500] kmem_cache_alloc+0x16b/0x370 [ 30.372046] vm_area_dup+0x20/0x160 [ 30.372508] __split_vma+0x170/0x950 [ 30.373025] split_vma+0xc6/0x110 [ 30.373469] mprotect_fixup+0x8d2/0xb30 [ 30.373992] do_mprotect_pkey+0x87e/0xd40 [ 30.374524] __x64_sys_mprotect+0x78/0xc0 [ 30.375064] do_syscall_64+0x3f/0x90 [ 30.375534] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.376193] [ 30.376408] Freed by task 214: [ 30.376809] kasan_save_stack+0x22/0x50 [ 30.377325] kasan_set_track+0x25/0x30 [ 30.377824] kasan_save_free_info+0x2b/0x50 [ 30.378380] __kasan_slab_free+0x10a/0x190 [ 30.378928] kmem_cache_free+0x10d/0x4d0 [ 30.379447] rcu_core+0x8c8/0x2860 [ 30.379921] __do_softirq+0x1b7/0x7d4 [ 30.380407] [ 30.380635] Last potentially related work creation: [ 30.381238] kasan_save_stack+0x22/0x50 [ 30.381744] __kasan_record_aux_stack+0x8e/0xa0 [ 30.382522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.383194] remove_vma+0x139/0x170 [ 30.383653] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.384230] do_vmi_munmap+0x1f1/0x2b0 [ 30.384727] __vm_munmap+0x138/0x3a0 [ 30.385208] __x64_sys_munmap+0x59/0x80 [ 30.385712] do_syscall_64+0x3f/0x90 [ 30.386204] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.386865] [ 30.387089] Second to last potentially related work creation: [ 30.387782] kasan_save_stack+0x22/0x50 [ 30.388302] __kasan_record_aux_stack+0x8e/0xa0 [ 30.388900] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.389555] remove_vma+0x139/0x170 [ 30.390021] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.390588] do_vmi_munmap+0x1f1/0x2b0 [ 30.391086] mmap_region+0x1f9/0x2660 [ 30.391566] do_mmap+0x854/0xf00 [ 30.392015] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.392502] ksys_mmap_pgoff+0x3af/0x500 [ 30.393049] do_syscall_64+0x3f/0x90 [ 30.393524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.394181] [ 30.394396] The buggy address belongs to the object at ffff88800d4720e8 [ 30.394396] which belongs to the cache vm_area_struct of size 168 [ 30.395877] The buggy address is located 88 bytes inside of [ 30.395877] freed 168-byte region [ffff88800d4720e8, ffff88800d472190) [ 30.397315] [ 30.397530] The buggy address belongs to the physical page: [ 30.398200] page:00000000a6cfd315 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd472 [ 30.399299] memcg:ffff88800ef50601 [ 30.399724] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.400444] page_type: 0xffffffff() [ 30.400924] raw: 0100000000000200 ffff88800879fc80 ffffea000067e6c0 dead000000000005 [ 30.401841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef50601 [ 30.402762] page dumped because: kasan: bad access detected [ 30.403441] [ 30.403660] Memory state around the buggy address: [ 30.404261] ffff88800d472000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.405162] ffff88800d472080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 30.406032] >ffff88800d472100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.406886] ^ [ 30.407537] ffff88800d472180: fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 [ 30.408414] ffff88800d472200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.409290] ================================================================== [ 30.410259] Disabling lock debugging due to kernel taint [ 32.675003] BUG: Bad rss-counter state mm:00000000e3df6973 type:MM_FILEPAGES val:33 [ 32.675994] BUG: Bad rss-counter state mm:00000000e3df6973 type:MM_ANONPAGES val:22 [ 33.160341] BUG: Bad rss-counter state mm:000000000e972bb1 type:MM_FILEPAGES val:33 [ 33.161999] BUG: Bad rss-counter state mm:000000000e972bb1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52684' (ECDSA) to the list of known hosts. 2023/06/20 05:02:35 fuzzer started 2023/06/20 05:02:36 dialing manager at localhost:44161 2023/06/20 05:02:36 checking machine... 2023/06/20 05:02:36 checking revisions... [ 33.898545] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:02:36 testing simple program... [ 33.948237] cgroup: Unknown subsys name 'net' [ 33.986007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:02:35 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007ffcb65b81f0 RCX=00007ffcb65b7fe0 RDX=00007fa281773000 RSI=0000000000000006 RDI=00005622e5cdf400 RBP=00005622e5cdf400 RSP=00007ffcb65b7d50 R8 =00007ffcb65b81f0 R9 =00007ffcb65b7d98 R10=0000000000000002 R11=000000000052545f R12=0000000000000006 R13=4fa60f835f290fa4 R14=00007ffcb65b7e98 R15=00007ffcb65b7d90 RIP=00007fa2819396e8 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fa280db5900 00000000 00000000 GS =0000 0000000000000000 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=00007fa28020eba0 CR3=000000000d7fa000 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=00000000000000003033323d4449505f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=be63b87a99ecc2b400000000000ae988 XMM05=8f17d5d51304ad4700000000001366e0 XMM06=c291bd5c70af25b900000000001354d0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888009b801f8 RCX=ffffffff83ab403d RDX=ffff8880159fb680 RSI=0000000000000004 RDI=ffffffff87f94e40 RBP=ffffffff87f94e40 RSP=ffff88801c977500 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000093900000939 R12=0000000000000000 R13=000000000000003f R14=dffffc0000000000 R15=ffffffff87f94640 RIP=ffffffff8180fd28 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 00007f7d4714a900 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=00005574b40d7954 CR3=000000000e7c4000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000