syzkaller login: [ 39.179654] BUG: Bad rss-counter state mm:0000000098e0415d type:MM_FILEPAGES val:33 [ 39.180988] BUG: Bad rss-counter state mm:0000000098e0415d type:MM_ANONPAGES val:22 [ 39.352092] ================================================================== [ 39.353069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.354302] Read of size 8 at addr ffff888016ff8b38 by task sshd/219 [ 39.355102] [ 39.355321] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.356193] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.357204] Call Trace: [ 39.357523] [ 39.357807] dump_stack_lvl+0x91/0xf0 [ 39.358319] print_report+0xcc/0x620 [ 39.358826] ? __virt_addr_valid+0x102/0x340 [ 39.359396] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.360027] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.360648] kasan_report+0xbe/0xf0 [ 39.361149] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.361776] vma_interval_tree_remove+0xc75/0xec0 [ 39.362412] vma_prepare+0xc54/0x11a0 [ 39.362916] __split_vma+0x5af/0x950 [ 39.363392] ? __pfx___split_vma+0x10/0x10 [ 39.363937] ? find_held_lock+0x2c/0x110 [ 39.364468] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.365060] ? lock_is_held_type+0x9f/0x120 [ 39.365604] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.366247] ? mtree_range_walk+0x632/0x900 [ 39.366833] ? mas_walk+0x5c7/0x7c0 [ 39.367326] do_vmi_munmap+0x1f1/0x2b0 [ 39.367826] mmap_region+0x1f9/0x2660 [ 39.368326] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.368844] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.369590] ? __pfx_lock_acquire+0x10/0x10 [ 39.370152] ? __pfx_mmap_region+0x10/0x10 [ 39.370701] ? security_mmap_addr+0x7d/0xa0 [ 39.371253] ? get_unmapped_area+0x1f5/0x3f0 [ 39.371811] do_mmap+0x854/0xf00 [ 39.372391] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.373047] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.373798] ksys_mmap_pgoff+0x3af/0x500 [ 39.374505] do_syscall_64+0x3f/0x90 [ 39.375152] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.375850] RIP: 0033:0x7fd6f0834d82 [ 39.376336] 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 [ 39.378511] RSP: 002b:00007ffd968eaa48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.379432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd6f0834d82 [ 39.380318] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd6efc6e000 [ 39.381186] RBP: 00007fd6efc6e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.382043] R10: 0000000000000812 R11: 0000000000000206 R12: 00005593f0e26f70 [ 39.382929] R13: 00007ffd968eaa60 R14: 00007ffd968eaa90 R15: 00007ffd968eadf0 [ 39.383792] [ 39.384114] [ 39.384332] Allocated by task 212: [ 39.384761] kasan_save_stack+0x22/0x50 [ 39.385285] kasan_set_track+0x25/0x30 [ 39.385781] __kasan_slab_alloc+0x59/0x70 [ 39.386322] kmem_cache_alloc+0x16b/0x370 [ 39.386862] vm_area_dup+0x20/0x160 [ 39.387328] __split_vma+0x170/0x950 [ 39.387798] split_vma+0xc6/0x110 [ 39.388264] mprotect_fixup+0x8d2/0xb30 [ 39.388771] do_mprotect_pkey+0x87e/0xd40 [ 39.389310] __x64_sys_mprotect+0x78/0xc0 [ 39.389839] do_syscall_64+0x3f/0x90 [ 39.390331] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.391212] [ 39.391482] Freed by task 212: [ 39.391968] kasan_save_stack+0x22/0x50 [ 39.392602] kasan_set_track+0x25/0x30 [ 39.393211] kasan_save_free_info+0x2b/0x50 [ 39.393864] __kasan_slab_free+0x10a/0x190 [ 39.394550] kmem_cache_free+0x10d/0x4d0 [ 39.395242] rcu_core+0x8c8/0x2860 [ 39.395790] __do_softirq+0x1b7/0x7d4 [ 39.396382] [ 39.396647] Last potentially related work creation: [ 39.397372] kasan_save_stack+0x22/0x50 [ 39.397992] __kasan_record_aux_stack+0x8e/0xa0 [ 39.398714] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.399511] remove_vma+0x139/0x170 [ 39.400071] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.400769] do_vmi_munmap+0x1f1/0x2b0 [ 39.401374] __vm_munmap+0x138/0x3a0 [ 39.401953] __x64_sys_munmap+0x59/0x80 [ 39.402580] do_syscall_64+0x3f/0x90 [ 39.403177] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.403972] [ 39.404240] The buggy address belongs to the object at ffff888016ff8ae0 [ 39.404240] which belongs to the cache vm_area_struct of size 168 [ 39.406075] The buggy address is located 88 bytes inside of [ 39.406075] freed 168-byte region [ffff888016ff8ae0, ffff888016ff8b88) [ 39.407694] [ 39.407910] The buggy address belongs to the physical page: [ 39.408566] page:00000000a28eee1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ff8 [ 39.409671] memcg:ffff888016f96f01 [ 39.410096] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.410748] page_type: 0xffffffff() [ 39.411209] raw: 0100000000000200 ffff88800879fc80 ffffea0000384900 dead00000000000c [ 39.412128] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016f96f01 [ 39.413045] page dumped because: kasan: bad access detected [ 39.413709] [ 39.413923] Memory state around the buggy address: [ 39.414513] ffff888016ff8a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.415369] ffff888016ff8a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 39.416226] >ffff888016ff8b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.417075] ^ [ 39.417682] ffff888016ff8b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 39.418553] ffff888016ff8c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.419400] ================================================================== [ 39.420329] Disabling lock debugging due to kernel taint [ 42.019785] BUG: Bad rss-counter state mm:0000000076c4e111 type:MM_FILEPAGES val:33 [ 42.020507] BUG: Bad rss-counter state mm:0000000076c4e111 type:MM_ANONPAGES val:22 [ 42.546650] BUG: Bad rss-counter state mm:00000000ff42ba7c type:MM_FILEPAGES val:33 [ 42.547871] BUG: Bad rss-counter state mm:00000000ff42ba7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14154' (ECDSA) to the list of known hosts. 2023/06/19 11:39:28 fuzzer started 2023/06/19 11:39:28 dialing manager at localhost:44161 2023/06/19 11:39:28 checking machine... 2023/06/19 11:39:28 checking revisions... [ 43.269635] kmemleak: Automatic memory scanning thread ended 2023/06/19 11:39:28 testing simple program... [ 43.317802] cgroup: Unknown subsys name 'net' [ 43.356335] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:39:27 Registers: info registers vcpu 0 RAX=0100000000000000 RBX=000000000000002c RCX=ffffffff8179075a RDX=1ffffd40000e5390 RSI=0000000000000008 RDI=ffffea0000729c80 RBP=ffffea0000729c80 RSP=ffff88806ce09e40 R8 =0000000000000000 R9 =fffff940000e5390 R10=ffffea0000729c87 R11=0000000000000000 R12=dffffc0000000000 R13=0000000000000000 R14=ffff88806ce35000 R15=ffff88801ca72000 RIP=ffffffff81790779 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 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=00007ffce3a10858 CR3=000000000e22c000 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=2038323a39333a3131203931206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a39333a3131203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81534376 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff81806ed6 RSP=ffff8880181d7368 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff88800844f780 R13=0000000000000000 R14=0000000000000246 R15=ffff88806cf3de00 RIP=ffffffff8153437e RFL=00000047 [---Z-PC] 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 00007f86945c9900 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=00007f8694b80618 CR3=0000000015cd8000 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