syzkaller login: [ 182.219085] BUG: Bad rss-counter state mm:0000000044733a3f type:MM_FILEPAGES val:33 [ 182.220306] BUG: Bad rss-counter state mm:0000000044733a3f type:MM_ANONPAGES val:22 [ 182.382627] ================================================================== [ 182.383572] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 182.384565] Read of size 8 at addr ffff88800e0db6b0 by task sshd/218 [ 182.385343] [ 182.385567] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 182.386720] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 182.387752] Call Trace: [ 182.388084] [ 182.388392] dump_stack_lvl+0x91/0xf0 [ 182.388901] print_report+0xcc/0x620 [ 182.389409] ? __virt_addr_valid+0x102/0x340 [ 182.389976] ? vma_interval_tree_remove+0xc75/0xec0 [ 182.390620] ? vma_interval_tree_remove+0xc75/0xec0 [ 182.391264] kasan_report+0xbe/0xf0 [ 182.391770] ? vma_interval_tree_remove+0xc75/0xec0 [ 182.392418] vma_interval_tree_remove+0xc75/0xec0 [ 182.393047] vma_prepare+0xc54/0x11a0 [ 182.393546] __split_vma+0x5af/0x950 [ 182.394036] ? __pfx___split_vma+0x10/0x10 [ 182.394575] ? find_held_lock+0x2c/0x110 [ 182.395118] do_vmi_align_munmap+0x2ba/0x11f0 [ 182.395686] ? lock_is_held_type+0x9f/0x120 [ 182.396261] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 182.396853] ? mtree_range_walk+0x632/0x900 [ 182.397399] ? mas_walk+0x5c7/0x7c0 [ 182.397869] do_vmi_munmap+0x1f1/0x2b0 [ 182.398367] mmap_region+0x1f9/0x2660 [ 182.398844] ? vm_mmap_pgoff+0x15c/0x3a0 [ 182.399350] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 182.400136] ? __pfx_lock_acquire+0x10/0x10 [ 182.400696] ? __pfx_mmap_region+0x10/0x10 [ 182.401232] ? security_mmap_addr+0x7d/0xa0 [ 182.401779] ? get_unmapped_area+0x1f5/0x3f0 [ 182.402321] do_mmap+0x854/0xf00 [ 182.402776] vm_mmap_pgoff+0x1a6/0x3a0 [ 182.403284] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 182.403882] ksys_mmap_pgoff+0x3af/0x500 [ 182.404388] do_syscall_64+0x3f/0x90 [ 182.404904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 182.405590] RIP: 0033:0x7f4ebddfcd82 [ 182.406042] 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 [ 182.408206] RSP: 002b:00007ffe623ab648 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 182.409126] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f4ebddfcd82 [ 182.409999] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f4ebd236000 [ 182.410858] RBP: 00007f4ebd236000 R08: 0000000000000009 R09: 0000000000001000 [ 182.411754] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d8f1044ec0 [ 182.412629] R13: 00007ffe623ab660 R14: 00007ffe623ab690 R15: 00007ffe623ab9f0 [ 182.413513] [ 182.413811] [ 182.414028] Allocated by task 211: [ 182.414463] kasan_save_stack+0x22/0x50 [ 182.414990] kasan_set_track+0x25/0x30 [ 182.415490] __kasan_slab_alloc+0x59/0x70 [ 182.416074] kmem_cache_alloc+0x16b/0x370 [ 182.416615] vm_area_dup+0x20/0x160 [ 182.417061] __split_vma+0x170/0x950 [ 182.417556] split_vma+0xc6/0x110 [ 182.418019] mprotect_fixup+0x8d2/0xb30 [ 182.418529] do_mprotect_pkey+0x87e/0xd40 [ 182.419048] __x64_sys_mprotect+0x78/0xc0 [ 182.419606] do_syscall_64+0x3f/0x90 [ 182.420108] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 182.420774] [ 182.420988] Freed by task 211: [ 182.421377] kasan_save_stack+0x22/0x50 [ 182.421893] kasan_set_track+0x25/0x30 [ 182.422389] kasan_save_free_info+0x2b/0x50 [ 182.422930] __kasan_slab_free+0x10a/0x190 [ 182.423456] kmem_cache_free+0x10d/0x4d0 [ 182.423994] rcu_core+0x8c8/0x2860 [ 182.424435] __do_softirq+0x1b7/0x7d4 [ 182.424923] [ 182.425138] Last potentially related work creation: [ 182.425740] kasan_save_stack+0x22/0x50 [ 182.426241] __kasan_record_aux_stack+0x8e/0xa0 [ 182.426839] __call_rcu_common.constprop.0+0x6a/0xb90 [ 182.427488] remove_vma+0x139/0x170 [ 182.427969] do_vmi_align_munmap+0xd4a/0x11f0 [ 182.428542] do_vmi_munmap+0x1f1/0x2b0 [ 182.429024] __vm_munmap+0x138/0x3a0 [ 182.429502] __x64_sys_munmap+0x59/0x80 [ 182.430017] do_syscall_64+0x3f/0x90 [ 182.430490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 182.431135] [ 182.431349] Second to last potentially related work creation: [ 182.432052] kasan_save_stack+0x22/0x50 [ 182.432580] __kasan_record_aux_stack+0x8e/0xa0 [ 182.433160] __call_rcu_common.constprop.0+0x6a/0xb90 [ 182.433817] remove_vma+0x139/0x170 [ 182.434265] do_vmi_align_munmap+0xd4a/0x11f0 [ 182.434834] do_vmi_munmap+0x1f1/0x2b0 [ 182.435323] mmap_region+0x1f9/0x2660 [ 182.435832] do_mmap+0x854/0xf00 [ 182.436261] vm_mmap_pgoff+0x1a6/0x3a0 [ 182.436761] ksys_mmap_pgoff+0x3af/0x500 [ 182.437256] do_syscall_64+0x3f/0x90 [ 182.437739] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 182.438388] [ 182.438623] The buggy address belongs to the object at ffff88800e0db658 [ 182.438623] which belongs to the cache vm_area_struct of size 168 [ 182.440096] The buggy address is located 88 bytes inside of [ 182.440096] freed 168-byte region [ffff88800e0db658, ffff88800e0db700) [ 182.441530] [ 182.441745] The buggy address belongs to the physical page: [ 182.442400] page:000000000e19d00d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe0db [ 182.443482] memcg:ffff88800f1c3901 [ 182.443941] flags: 0x100000000000200(slab|node=0|zone=1) [ 182.444592] page_type: 0xffffffff() [ 182.445039] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 182.445971] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f1c3901 [ 182.446876] page dumped because: kasan: bad access detected [ 182.447548] [ 182.447770] Memory state around the buggy address: [ 182.448345] ffff88800e0db580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 182.449215] ffff88800e0db600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 182.450075] >ffff88800e0db680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 182.450934] ^ [ 182.451525] ffff88800e0db700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 182.452393] ffff88800e0db780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 182.453248] ================================================================== [ 182.454247] Disabling lock debugging due to kernel taint [ 184.652553] BUG: Bad rss-counter state mm:00000000efdeadcf type:MM_FILEPAGES val:33 [ 184.653541] BUG: Bad rss-counter state mm:00000000efdeadcf type:MM_ANONPAGES val:22 [ 185.261257] BUG: Bad rss-counter state mm:00000000c40316c6 type:MM_FILEPAGES val:33 [ 185.262606] BUG: Bad rss-counter state mm:00000000c40316c6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34138' (ECDSA) to the list of known hosts. 2023/06/19 21:24:48 fuzzer started 2023/06/19 21:24:48 dialing manager at localhost:44161 2023/06/19 21:24:48 checking machine... 2023/06/19 21:24:48 checking revisions... [ 185.918031] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:24:48 testing simple program... [ 185.970071] cgroup: Unknown subsys name 'net' [ 186.073572] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:22:24 Registers: info registers vcpu 0 RAX=ffffed10028c8e73 RBX=1ffff110028c8e73 RCX=0000000000000002 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff8560b640 RBP=0000000000000000 RSP=ffff888014647388 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff812d8e7d RFL=00000282 [--S----] 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 00007f631e6ae900 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=00007f631db089f0 CR3=0000000009aa6000 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=8485add5a016ab96634468be79012bc7 XMM02=eff9b2d0a8fce9cb000000000012c9a8 XMM03=2c67c8bc2e329bc3000000000012cad0 XMM04=ef43a6e5ade5977100000000000ae988 XMM05=4a9df1b7876bf3f400000000001458d0 XMM06=dfcdbad4f1609c370000000000144a18 XMM07=fb795ef6d65770560000000000133478 XMM08=2c67c8bc2e329bc3000000000012cad0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=000000000000001f RCX=ffffffff81f58614 RDX=0000000000000062 RSI=000000000000001f RDI=0000000000000002 RBP=ffff88800bb0a800 RSP=ffff888018ebfa88 R8 =0000000000000002 R9 =000000000000001f R10=0000000000000062 R11=0000000000000000 R12=ffff888018ebfd68 R13=0000000000000001 R14=0000000000000062 R15=dffffc0000000000 RIP=ffffffff814c01d0 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 00007f6efc70f900 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=00007f6efccc6618 CR3=000000001a264000 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