syzkaller login: [ 34.135838] BUG: Bad rss-counter state mm:000000001d9efe4b type:MM_FILEPAGES val:33 [ 34.137506] BUG: Bad rss-counter state mm:000000001d9efe4b type:MM_ANONPAGES val:22 [ 34.296596] ================================================================== [ 34.297499] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.298441] Read of size 8 at addr ffff88800e671df0 by task sshd/220 [ 34.299293] [ 34.299519] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.300398] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.301386] Call Trace: [ 34.301706] [ 34.301991] dump_stack_lvl+0x91/0xf0 [ 34.302483] print_report+0xcc/0x620 [ 34.302966] ? __virt_addr_valid+0x102/0x340 [ 34.303516] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.304150] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.304766] kasan_report+0xbe/0xf0 [ 34.305237] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.305865] vma_interval_tree_remove+0xc75/0xec0 [ 34.306455] vma_prepare+0xc54/0x11a0 [ 34.306925] __split_vma+0x5af/0x950 [ 34.307389] ? __pfx___split_vma+0x10/0x10 [ 34.307921] ? find_held_lock+0x2c/0x110 [ 34.308435] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.309000] ? lock_is_held_type+0x9f/0x120 [ 34.309538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.310141] ? mtree_range_walk+0x632/0x900 [ 34.310687] ? mas_walk+0x5c7/0x7c0 [ 34.311156] do_vmi_munmap+0x1f1/0x2b0 [ 34.311645] mmap_region+0x1f9/0x2660 [ 34.312140] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.312645] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.313350] ? __pfx_lock_acquire+0x10/0x10 [ 34.313871] ? __pfx_mmap_region+0x10/0x10 [ 34.314394] ? security_mmap_addr+0x7d/0xa0 [ 34.314917] ? get_unmapped_area+0x1f5/0x3f0 [ 34.315454] do_mmap+0x854/0xf00 [ 34.315910] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.316406] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.316957] ksys_mmap_pgoff+0x3af/0x500 [ 34.317458] do_syscall_64+0x3f/0x90 [ 34.317935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.318576] RIP: 0033:0x7f38fbfe4d82 [ 34.319031] 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 [ 34.321132] RSP: 002b:00007ffd2c2254e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.322053] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f38fbfe4d82 [ 34.322897] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f38fb41e000 [ 34.323764] RBP: 00007f38fb41e000 R08: 0000000000000009 R09: 0000000000001000 [ 34.324615] R10: 0000000000000812 R11: 0000000000000206 R12: 00005563b5171ec0 [ 34.325465] R13: 00007ffd2c225500 R14: 00007ffd2c225530 R15: 00007ffd2c225890 [ 34.326331] [ 34.326624] [ 34.326844] Allocated by task 213: [ 34.327278] kasan_save_stack+0x22/0x50 [ 34.327792] kasan_set_track+0x25/0x30 [ 34.328283] __kasan_slab_alloc+0x59/0x70 [ 34.328812] kmem_cache_alloc+0x16b/0x370 [ 34.329330] vm_area_dup+0x20/0x160 [ 34.329788] __split_vma+0x170/0x950 [ 34.330248] split_vma+0xc6/0x110 [ 34.330684] mprotect_fixup+0x8d2/0xb30 [ 34.331183] do_mprotect_pkey+0x87e/0xd40 [ 34.331700] __x64_sys_mprotect+0x78/0xc0 [ 34.332255] do_syscall_64+0x3f/0x90 [ 34.332728] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.333364] [ 34.333576] Freed by task 213: [ 34.333968] kasan_save_stack+0x22/0x50 [ 34.334467] kasan_set_track+0x25/0x30 [ 34.334956] kasan_save_free_info+0x2b/0x50 [ 34.335488] __kasan_slab_free+0x10a/0x190 [ 34.336023] kmem_cache_free+0x10d/0x4d0 [ 34.336526] rcu_core+0x8c8/0x2860 [ 34.336969] __do_softirq+0x1b7/0x7d4 [ 34.337441] [ 34.337656] Last potentially related work creation: [ 34.338237] kasan_save_stack+0x22/0x50 [ 34.338731] __kasan_record_aux_stack+0x8e/0xa0 [ 34.339305] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.339948] remove_vma+0x139/0x170 [ 34.340392] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.340943] do_vmi_munmap+0x1f1/0x2b0 [ 34.341418] __vm_munmap+0x138/0x3a0 [ 34.341876] __x64_sys_munmap+0x59/0x80 [ 34.342371] do_syscall_64+0x3f/0x90 [ 34.342842] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.343481] [ 34.343699] Second to last potentially related work creation: [ 34.344403] kasan_save_stack+0x22/0x50 [ 34.344906] __kasan_record_aux_stack+0x8e/0xa0 [ 34.345473] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.346106] remove_vma+0x139/0x170 [ 34.346559] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.347113] do_vmi_munmap+0x1f1/0x2b0 [ 34.347595] mmap_region+0x1f9/0x2660 [ 34.348073] do_mmap+0x854/0xf00 [ 34.348503] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.348991] ksys_mmap_pgoff+0x3af/0x500 [ 34.349488] do_syscall_64+0x3f/0x90 [ 34.349955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.350595] [ 34.350807] The buggy address belongs to the object at ffff88800e671d98 [ 34.350807] which belongs to the cache vm_area_struct of size 168 [ 34.352282] The buggy address is located 88 bytes inside of [ 34.352282] freed 168-byte region [ffff88800e671d98, ffff88800e671e40) [ 34.353684] [ 34.353898] The buggy address belongs to the physical page: [ 34.354549] page:00000000a12616b4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe671 [ 34.355616] memcg:ffff88800d2e9a01 [ 34.356057] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.356692] page_type: 0xffffffff() [ 34.357141] raw: 0100000000000200 ffff88800879fc80 ffffea00003920c0 dead00000000000a [ 34.358048] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e9a01 [ 34.358942] page dumped because: kasan: bad access detected [ 34.359600] [ 34.359822] Memory state around the buggy address: [ 34.360399] ffff88800e671c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.361250] ffff88800e671d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.362096] >ffff88800e671d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.362930] ^ [ 34.363733] ffff88800e671e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.364585] ffff88800e671e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.365432] ================================================================== [ 34.366402] Disabling lock debugging due to kernel taint [ 36.284190] BUG: Bad rss-counter state mm:00000000a5687104 type:MM_FILEPAGES val:33 [ 36.285481] BUG: Bad rss-counter state mm:00000000a5687104 type:MM_ANONPAGES val:22 [ 36.815117] BUG: Bad rss-counter state mm:00000000c01ffbd2 type:MM_FILEPAGES val:33 [ 36.816302] BUG: Bad rss-counter state mm:00000000c01ffbd2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:38730' (ECDSA) to the list of known hosts. 2023/06/19 19:21:05 fuzzer started 2023/06/19 19:21:05 dialing manager at localhost:44161 2023/06/19 19:21:05 checking machine... 2023/06/19 19:21:05 checking revisions... [ 37.447919] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:21:05 testing simple program... [ 37.491112] cgroup: Unknown subsys name 'net' [ 37.540506] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:21:01 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=00000000007fffff RCX=0000000000000000 RDX=0000000000000014 RSI=ffff88800dd880dc RDI=ffff88800ece7ca8 RBP=0000000000000001 RSP=ffff88800ece7c20 R8 =0000000000000004 R9 =0000000000000001 R10=0000000000000001 R11=0000000000000000 R12=0000000000000008 R13=000000000000001f R14=0000000000000001 R15=ffff88800ece7ca8 RIP=ffffffff8450d064 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 00007f50b5e53900 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=00005577c0e07954 CR3=000000001464e000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f2a683eaf60 CR3=000000000e522000 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=2035303a31323a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31323a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000