syzkaller login: [ 51.809728] BUG: Bad rss-counter state mm:000000009640a95c type:MM_FILEPAGES val:33 [ 51.810991] BUG: Bad rss-counter state mm:000000009640a95c type:MM_ANONPAGES val:22 [ 51.850020] ================================================================== [ 51.851069] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.852306] Read of size 8 at addr ffff888015d995c8 by task sshd/221 [ 51.853155] [ 51.853401] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.854383] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.855465] Call Trace: [ 51.855812] [ 51.856127] dump_stack_lvl+0x91/0xf0 [ 51.856714] print_report+0xcc/0x620 [ 51.857264] ? __virt_addr_valid+0x102/0x340 [ 51.857875] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.858578] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.859267] kasan_report+0xbe/0xf0 [ 51.859806] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.860523] vma_interval_tree_remove+0xc75/0xec0 [ 51.861208] vma_prepare+0xc54/0x11a0 [ 51.861744] __split_vma+0x5af/0x950 [ 51.862267] ? __pfx___split_vma+0x10/0x10 [ 51.862854] ? find_held_lock+0x2c/0x110 [ 51.863433] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.864064] ? lock_is_held_type+0x9f/0x120 [ 51.864675] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.865341] ? mtree_range_walk+0x632/0x900 [ 51.865951] ? mas_walk+0x5c7/0x7c0 [ 51.866480] do_vmi_munmap+0x1f1/0x2b0 [ 51.867032] mmap_region+0x1f9/0x2660 [ 51.867558] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.868123] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.868931] ? __pfx_lock_acquire+0x10/0x10 [ 51.869525] ? __pfx_mmap_region+0x10/0x10 [ 51.870114] ? security_mmap_addr+0x7d/0xa0 [ 51.870695] ? get_unmapped_area+0x1f5/0x3f0 [ 51.871299] do_mmap+0x854/0xf00 [ 51.871785] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.872360] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.872983] ksys_mmap_pgoff+0x3af/0x500 [ 51.873546] do_syscall_64+0x3f/0x90 [ 51.874077] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.874786] RIP: 0033:0x7f6ea3a71d82 [ 51.875288] 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 [ 51.877636] RSP: 002b:00007ffec88f2418 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.878618] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6ea3a71d82 [ 51.879566] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6ea2eab000 [ 51.880551] RBP: 00007f6ea2eab000 R08: 0000000000000009 R09: 0000000000001000 [ 51.881493] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f5385fdec0 [ 51.882418] R13: 00007ffec88f2430 R14: 00007ffec88f2460 R15: 00007ffec88f27c0 [ 51.883335] [ 51.883659] [ 51.883890] Allocated by task 214: [ 51.884361] kasan_save_stack+0x22/0x50 [ 51.884900] kasan_set_track+0x25/0x30 [ 51.885452] __kasan_slab_alloc+0x59/0x70 [ 51.886029] kmem_cache_alloc+0x16b/0x370 [ 51.886612] vm_area_dup+0x20/0x160 [ 51.887105] __split_vma+0x170/0x950 [ 51.887616] split_vma+0xc6/0x110 [ 51.888095] mprotect_fixup+0x8d2/0xb30 [ 51.888656] do_mprotect_pkey+0x87e/0xd40 [ 51.889222] __x64_sys_mprotect+0x78/0xc0 [ 51.889790] do_syscall_64+0x3f/0x90 [ 51.890302] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.890994] [ 51.891229] Freed by task 214: [ 51.891661] kasan_save_stack+0x22/0x50 [ 51.892221] kasan_set_track+0x25/0x30 [ 51.892761] kasan_save_free_info+0x2b/0x50 [ 51.893346] __kasan_slab_free+0x10a/0x190 [ 51.893916] kmem_cache_free+0x10d/0x4d0 [ 51.894459] rcu_core+0x8c8/0x2860 [ 51.894941] __do_softirq+0x1b7/0x7d4 [ 51.895440] [ 51.895676] Last potentially related work creation: [ 51.896331] kasan_save_stack+0x22/0x50 [ 51.896874] __kasan_record_aux_stack+0x8e/0xa0 [ 51.897490] __call_rcu_common.constprop.0+0x6a/0xb90 [ 51.898183] remove_vma+0x139/0x170 [ 51.898683] do_vmi_align_munmap+0xd4a/0x11f0 [ 51.899302] do_vmi_munmap+0x1f1/0x2b0 [ 51.899843] __vm_munmap+0x138/0x3a0 [ 51.900376] __x64_sys_munmap+0x59/0x80 [ 51.900930] do_syscall_64+0x3f/0x90 [ 51.901460] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.902174] [ 51.902416] The buggy address belongs to the object at ffff888015d99570 [ 51.902416] which belongs to the cache vm_area_struct of size 168 [ 51.904054] The buggy address is located 88 bytes inside of [ 51.904054] freed 168-byte region [ffff888015d99570, ffff888015d99618) [ 51.905632] [ 51.905869] The buggy address belongs to the physical page: [ 51.906605] page:00000000a581ac02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15d99 [ 51.907811] memcg:ffff888010078801 [ 51.908304] flags: 0x100000000000200(slab|node=0|zone=1) [ 51.909017] page_type: 0xffffffff() [ 51.909512] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 51.910536] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888010078801 [ 51.911538] page dumped because: kasan: bad access detected [ 51.912281] [ 51.912518] Memory state around the buggy address: [ 51.913156] ffff888015d99480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 51.914099] ffff888015d99500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 51.915044] >ffff888015d99580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.915986] ^ [ 51.916729] ffff888015d99600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 51.917678] ffff888015d99680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 51.918622] ================================================================== [ 51.919962] Disabling lock debugging due to kernel taint [ 54.420026] BUG: Bad rss-counter state mm:00000000f6ba1bf2 type:MM_FILEPAGES val:33 [ 54.421263] BUG: Bad rss-counter state mm:00000000f6ba1bf2 type:MM_ANONPAGES val:22 [ 54.868750] BUG: Bad rss-counter state mm:0000000037333dd7 type:MM_FILEPAGES val:33 [ 54.869754] BUG: Bad rss-counter state mm:0000000037333dd7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:22197' (ECDSA) to the list of known hosts. 2023/06/19 17:47:46 fuzzer started 2023/06/19 17:47:46 dialing manager at localhost:44161 2023/06/19 17:47:46 checking machine... 2023/06/19 17:47:46 checking revisions... [ 55.439005] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:47:46 testing simple program... [ 55.500102] cgroup: Unknown subsys name 'net' [ 55.541944] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:47:25 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffd16970388 CR3=0000000015e74000 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=2035343a37343a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a37343a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=00007f4746b82163 RCX=0000000080000000 RDX=1ffff11001e0be56 RSI=ffffffff81007b50 RDI=00007f4746b82163 RBP=00007f4746b82163 RSP=ffff88800f05f1d8 R8 =ffffffff864b9d5a R9 =ffff88800f05f298 R10=0000000000038001 R11=00000000000b6996 R12=ffff88800f05f320 R13=0000000000000000 R14=ffff88800e9cd1c0 R15=00000000000928c0 RIP=ffffffff814c07f1 RFL=00000207 [-----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 00007f474668f900 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=00007ffc4b76c000 CR3=000000001645e000 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