syzkaller login: [ 30.095740] BUG: Bad rss-counter state mm:0000000090541272 type:MM_FILEPAGES val:33 [ 30.097223] BUG: Bad rss-counter state mm:0000000090541272 type:MM_ANONPAGES val:22 [ 30.259358] ================================================================== [ 30.260365] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.261358] Read of size 8 at addr ffff888016a773f8 by task sshd/220 [ 30.262344] [ 30.262576] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.263481] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.264564] Call Trace: [ 30.264902] [ 30.265201] dump_stack_lvl+0x91/0xf0 [ 30.265732] print_report+0xcc/0x620 [ 30.266248] ? __virt_addr_valid+0x102/0x340 [ 30.266836] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.267485] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.268148] kasan_report+0xbe/0xf0 [ 30.268663] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.269320] vma_interval_tree_remove+0xc75/0xec0 [ 30.269965] vma_prepare+0xc54/0x11a0 [ 30.270469] __split_vma+0x5af/0x950 [ 30.270975] ? __pfx___split_vma+0x10/0x10 [ 30.271537] ? find_held_lock+0x2c/0x110 [ 30.272098] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.272712] ? lock_is_held_type+0x9f/0x120 [ 30.273287] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.273926] ? mtree_range_walk+0x632/0x900 [ 30.274507] ? mas_walk+0x5c7/0x7c0 [ 30.275013] do_vmi_munmap+0x1f1/0x2b0 [ 30.275536] mmap_region+0x1f9/0x2660 [ 30.276053] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.276610] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.277368] ? __pfx_lock_acquire+0x10/0x10 [ 30.277933] ? __pfx_mmap_region+0x10/0x10 [ 30.278488] ? security_mmap_addr+0x7d/0xa0 [ 30.279049] ? get_unmapped_area+0x1f5/0x3f0 [ 30.279629] do_mmap+0x854/0xf00 [ 30.280096] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.280622] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.281217] ksys_mmap_pgoff+0x3af/0x500 [ 30.281754] do_syscall_64+0x3f/0x90 [ 30.282272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.282956] RIP: 0033:0x7fd221142d82 [ 30.283440] 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 [ 30.285707] RSP: 002b:00007ffe0eb2aae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.286670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd221142d82 [ 30.287571] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd22057c000 [ 30.288483] RBP: 00007fd22057c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.289376] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557abab35b20 [ 30.290269] R13: 00007ffe0eb2ab00 R14: 00007ffe0eb2ab30 R15: 00007ffe0eb2ae90 [ 30.291173] [ 30.291479] [ 30.291705] Allocated by task 213: [ 30.292161] kasan_save_stack+0x22/0x50 [ 30.292712] kasan_set_track+0x25/0x30 [ 30.293238] __kasan_slab_alloc+0x59/0x70 [ 30.293792] kmem_cache_alloc+0x16b/0x370 [ 30.294340] vm_area_dup+0x20/0x160 [ 30.294816] __split_vma+0x170/0x950 [ 30.295306] split_vma+0xc6/0x110 [ 30.295771] mprotect_fixup+0x8d2/0xb30 [ 30.296323] do_mprotect_pkey+0x87e/0xd40 [ 30.296901] __x64_sys_mprotect+0x78/0xc0 [ 30.297461] do_syscall_64+0x3f/0x90 [ 30.297988] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.298725] [ 30.298971] Freed by task 213: [ 30.299425] kasan_save_stack+0x22/0x50 [ 30.300008] kasan_set_track+0x25/0x30 [ 30.300580] kasan_save_free_info+0x2b/0x50 [ 30.301190] __kasan_slab_free+0x10a/0x190 [ 30.301797] kmem_cache_free+0x10d/0x4d0 [ 30.302378] rcu_core+0x8c8/0x2860 [ 30.302885] __do_softirq+0x1b7/0x7d4 [ 30.303512] [ 30.303754] Last potentially related work creation: [ 30.304468] kasan_save_stack+0x22/0x50 [ 30.305052] __kasan_record_aux_stack+0x8e/0xa0 [ 30.305703] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.306454] remove_vma+0x139/0x170 [ 30.306982] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.307625] do_vmi_munmap+0x1f1/0x2b0 [ 30.308173] __vm_munmap+0x138/0x3a0 [ 30.308718] __x64_sys_munmap+0x59/0x80 [ 30.309286] do_syscall_64+0x3f/0x90 [ 30.309839] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.310577] [ 30.310823] The buggy address belongs to the object at ffff888016a773a0 [ 30.310823] which belongs to the cache vm_area_struct of size 168 [ 30.312540] The buggy address is located 88 bytes inside of [ 30.312540] freed 168-byte region [ffff888016a773a0, ffff888016a77448) [ 30.314169] [ 30.314419] The buggy address belongs to the physical page: [ 30.315175] page:00000000c6a8e27c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16a77 [ 30.316450] memcg:ffff8880095a9701 [ 30.316940] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.317673] page_type: 0xffffffff() [ 30.318186] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.319250] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880095a9701 [ 30.320323] page dumped because: kasan: bad access detected [ 30.321090] [ 30.321333] Memory state around the buggy address: [ 30.322010] ffff888016a77280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.323003] ffff888016a77300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.323983] >ffff888016a77380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.324972] ^ [ 30.325939] ffff888016a77400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.326916] ffff888016a77480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.327892] ================================================================== [ 30.329236] Disabling lock debugging due to kernel taint [ 32.265187] BUG: Bad rss-counter state mm:000000004431d537 type:MM_FILEPAGES val:33 [ 32.266424] BUG: Bad rss-counter state mm:000000004431d537 type:MM_ANONPAGES val:22 [ 32.785901] BUG: Bad rss-counter state mm:000000008a12895c type:MM_FILEPAGES val:33 [ 32.787116] BUG: Bad rss-counter state mm:000000008a12895c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18462' (ECDSA) to the list of known hosts. 2023/06/21 03:49:48 fuzzer started 2023/06/21 03:49:48 dialing manager at localhost:36067 2023/06/21 03:49:48 checking machine... 2023/06/21 03:49:48 checking revisions... [ 33.419657] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:49:49 testing simple program... [ 33.462469] cgroup: Unknown subsys name 'net' [ 33.503681] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:49:48 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=1ffff11003331f5d RSI=1ffff11003331f5f RDI=1ffff11003331f5f RBP=ffff88801998faf8 RSP=ffff88801998fa30 R8 =ffffffff86138e90 R9 =ffff88801998fae0 R10=0000000000038001 R11=0000000000020d8f R12=ffff88801998fb00 R13=ffff88801998fae8 R14=ffff88801998fdf0 R15=ffff88801998faa0 RIP=ffffffff811310af 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 00007f6114637900 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=00007f6114bef0b0 CR3=00000000194ea000 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=ffffffffffffffffffffffff00000000 XMM01=000000000000000000005500746f6f72 XMM02=ff000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=000a687361622f6e69622f3a746f6f72 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffd22891468 CR3=000000000eeee000 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=2038343a39343a3330203132206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038343a39343a3330203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000