syzkaller login: [ 63.242630] BUG: Bad rss-counter state mm:00000000e0097d49 type:MM_FILEPAGES val:33 [ 63.243879] BUG: Bad rss-counter state mm:00000000e0097d49 type:MM_ANONPAGES val:22 [ 63.406619] ================================================================== [ 63.407647] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 63.408590] Read of size 8 at addr ffff888018de2310 by task sshd/226 [ 63.409450] [ 63.409691] CPU: 1 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 63.410553] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 63.411536] Call Trace: [ 63.411876] [ 63.412163] dump_stack_lvl+0x91/0xf0 [ 63.412656] print_report+0xcc/0x620 [ 63.413163] ? __virt_addr_valid+0x102/0x340 [ 63.413718] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.414347] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.414973] kasan_report+0xbe/0xf0 [ 63.415453] ? vma_interval_tree_remove+0xc75/0xec0 [ 63.416076] vma_interval_tree_remove+0xc75/0xec0 [ 63.416674] vma_prepare+0xc54/0x11a0 [ 63.417160] __split_vma+0x5af/0x950 [ 63.417643] ? __pfx___split_vma+0x10/0x10 [ 63.418170] ? find_held_lock+0x2c/0x110 [ 63.418695] do_vmi_align_munmap+0x2ba/0x11f0 [ 63.419302] ? lock_is_held_type+0x9f/0x120 [ 63.419848] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 63.420450] ? mtree_range_walk+0x632/0x900 [ 63.421012] ? mas_walk+0x5c7/0x7c0 [ 63.421488] do_vmi_munmap+0x1f1/0x2b0 [ 63.421979] mmap_region+0x1f9/0x2660 [ 63.422476] ? vm_mmap_pgoff+0x15c/0x3a0 [ 63.423016] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 63.423761] ? __pfx_lock_acquire+0x10/0x10 [ 63.424322] ? __pfx_mmap_region+0x10/0x10 [ 63.424876] ? security_mmap_addr+0x7d/0xa0 [ 63.425445] ? get_unmapped_area+0x1f5/0x3f0 [ 63.426017] do_mmap+0x854/0xf00 [ 63.426477] vm_mmap_pgoff+0x1a6/0x3a0 [ 63.427013] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 63.427600] ksys_mmap_pgoff+0x3af/0x500 [ 63.428127] do_syscall_64+0x3f/0x90 [ 63.428625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.429297] RIP: 0033:0x7f9320c6cd82 [ 63.429776] 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 [ 63.432016] RSP: 002b:00007fff93e625d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 63.432948] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9320c6cd82 [ 63.433826] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f93200a6000 [ 63.434707] RBP: 00007f93200a6000 R08: 0000000000000009 R09: 0000000000001000 [ 63.435603] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b4ff6fdd90 [ 63.436482] R13: 00007fff93e625f0 R14: 00007fff93e62620 R15: 00007fff93e62980 [ 63.437373] [ 63.437683] [ 63.437906] Allocated by task 219: [ 63.438352] kasan_save_stack+0x22/0x50 [ 63.438894] kasan_set_track+0x25/0x30 [ 63.439408] __kasan_slab_alloc+0x59/0x70 [ 63.439952] kmem_cache_alloc+0x16b/0x370 [ 63.440490] vm_area_dup+0x20/0x160 [ 63.440960] __split_vma+0x170/0x950 [ 63.441447] split_vma+0xc6/0x110 [ 63.441902] mprotect_fixup+0x8d2/0xb30 [ 63.442427] do_mprotect_pkey+0x87e/0xd40 [ 63.442986] __x64_sys_mprotect+0x78/0xc0 [ 63.443534] do_syscall_64+0x3f/0x90 [ 63.444024] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.444699] [ 63.444919] Freed by task 219: [ 63.445323] kasan_save_stack+0x22/0x50 [ 63.445841] kasan_set_track+0x25/0x30 [ 63.446348] kasan_save_free_info+0x2b/0x50 [ 63.446912] __kasan_slab_free+0x10a/0x190 [ 63.447464] kmem_cache_free+0x10d/0x4d0 [ 63.447991] rcu_core+0x8c8/0x2860 [ 63.448458] __do_softirq+0x1b7/0x7d4 [ 63.448950] [ 63.449172] Last potentially related work creation: [ 63.449780] kasan_save_stack+0x22/0x50 [ 63.450304] __kasan_record_aux_stack+0x8e/0xa0 [ 63.450956] __call_rcu_common.constprop.0+0x6a/0xb90 [ 63.451629] remove_vma+0x139/0x170 [ 63.452094] do_vmi_align_munmap+0xd4a/0x11f0 [ 63.452670] do_vmi_munmap+0x1f1/0x2b0 [ 63.453175] __vm_munmap+0x138/0x3a0 [ 63.453668] __x64_sys_munmap+0x59/0x80 [ 63.454180] do_syscall_64+0x3f/0x90 [ 63.454669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 63.455347] [ 63.455567] The buggy address belongs to the object at ffff888018de22b8 [ 63.455567] which belongs to the cache vm_area_struct of size 168 [ 63.457099] The buggy address is located 88 bytes inside of [ 63.457099] freed 168-byte region [ffff888018de22b8, ffff888018de2360) [ 63.458557] [ 63.458779] The buggy address belongs to the physical page: [ 63.459495] page:00000000fa96d293 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18de2 [ 63.460632] memcg:ffff888015e9ca01 [ 63.461074] flags: 0x100000000000200(slab|node=0|zone=1) [ 63.461745] page_type: 0xffffffff() [ 63.462214] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 63.463189] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015e9ca01 [ 63.464138] page dumped because: kasan: bad access detected [ 63.464829] [ 63.465049] Memory state around the buggy address: [ 63.465649] ffff888018de2200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 63.466552] ffff888018de2280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 63.467466] >ffff888018de2300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 63.468365] ^ [ 63.468851] ffff888018de2380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 63.469741] ffff888018de2400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 63.470635] ================================================================== [ 63.471597] Disabling lock debugging due to kernel taint [ 65.450511] BUG: Bad rss-counter state mm:00000000068882c6 type:MM_FILEPAGES val:33 [ 65.451497] BUG: Bad rss-counter state mm:00000000068882c6 type:MM_ANONPAGES val:22 [ 65.978483] BUG: Bad rss-counter state mm:0000000010832294 type:MM_FILEPAGES val:33 [ 65.979607] BUG: Bad rss-counter state mm:0000000010832294 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59821' (ECDSA) to the list of known hosts. 2023/06/19 17:35:49 fuzzer started 2023/06/19 17:35:49 dialing manager at localhost:44161 2023/06/19 17:35:49 checking machine... 2023/06/19 17:35:49 checking revisions... [ 66.678946] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:35:49 testing simple program... [ 66.728851] cgroup: Unknown subsys name 'net' [ 66.779246] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:35:46 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c84ed RDX=ffff888016bb9b40 RSI=0000000000000000 RDI=0000000000000000 RBP=0000000000000000 RSP=ffff88806ce09a20 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652a88 R15=ffff88800fbf0900 RIP=ffffffff814c0388 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 00007f7a8698b900 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=00007fffb781b000 CR3=000000000fc88000 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=0000000000000001 RBX=0000000000000200 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff81830c63 RDI=ffffffff8560b640 RBP=ffffea00006fbac0 RSP=ffff88800fec7a68 R8 =0000000000000001 R9 =fffffbfff0a8288d R10=ffffffff8541446f R11=0000000000000128 R12=00000000ffffffff R13=ffff888019bfa401 R14=0000000000000001 R15=ffff888019bfa298 RIP=ffffffff81830c80 RFL=00000093 [--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 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=00007ffe011d3698 CR3=0000000005482000 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=00007f5880c7d510000055ff8204d790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000