syzkaller login: [ 46.356080] BUG: Bad rss-counter state mm:00000000568e3b83 type:MM_FILEPAGES val:33 [ 46.356831] BUG: Bad rss-counter state mm:00000000568e3b83 type:MM_ANONPAGES val:22 [ 46.522619] ================================================================== [ 46.523656] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 46.524695] Read of size 8 at addr ffff88800d7543f8 by task sshd/220 [ 46.525689] [ 46.525934] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 46.526895] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 46.528028] Call Trace: [ 46.528391] [ 46.528713] dump_stack_lvl+0x91/0xf0 [ 46.529275] print_report+0xcc/0x620 [ 46.529829] ? __virt_addr_valid+0x102/0x340 [ 46.530471] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.531185] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.531913] kasan_report+0xbe/0xf0 [ 46.532492] ? vma_interval_tree_remove+0xc75/0xec0 [ 46.533218] vma_interval_tree_remove+0xc75/0xec0 [ 46.533914] vma_prepare+0xc54/0x11a0 [ 46.534475] __split_vma+0x5af/0x950 [ 46.535025] ? __pfx___split_vma+0x10/0x10 [ 46.535651] ? find_held_lock+0x2c/0x110 [ 46.536298] do_vmi_align_munmap+0x2ba/0x11f0 [ 46.536960] ? lock_is_held_type+0x9f/0x120 [ 46.537581] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 46.538292] ? mtree_range_walk+0x632/0x900 [ 46.538926] ? mas_walk+0x5c7/0x7c0 [ 46.539495] do_vmi_munmap+0x1f1/0x2b0 [ 46.540064] mmap_region+0x1f9/0x2660 [ 46.540622] ? vm_mmap_pgoff+0x15c/0x3a0 [ 46.541216] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 46.542051] ? __pfx_lock_acquire+0x10/0x10 [ 46.542671] ? __pfx_mmap_region+0x10/0x10 [ 46.543285] ? security_mmap_addr+0x7d/0xa0 [ 46.543913] ? get_unmapped_area+0x1f5/0x3f0 [ 46.544549] do_mmap+0x854/0xf00 [ 46.545060] vm_mmap_pgoff+0x1a6/0x3a0 [ 46.545625] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 46.546264] ksys_mmap_pgoff+0x3af/0x500 [ 46.546841] do_syscall_64+0x3f/0x90 [ 46.547382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.548118] RIP: 0033:0x7f09b1087d82 [ 46.548630] 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 [ 46.551014] RSP: 002b:00007fff33775098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 46.552047] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f09b1087d82 [ 46.553022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f09b04c1000 [ 46.553993] RBP: 00007f09b04c1000 R08: 0000000000000009 R09: 0000000000001000 [ 46.554970] R10: 0000000000000812 R11: 0000000000000206 R12: 00005641a4799ec0 [ 46.555955] R13: 00007fff337750b0 R14: 00007fff337750e0 R15: 00007fff33775440 [ 46.556947] [ 46.557286] [ 46.557532] Allocated by task 213: [ 46.558026] kasan_save_stack+0x22/0x50 [ 46.558606] kasan_set_track+0x25/0x30 [ 46.559184] __kasan_slab_alloc+0x59/0x70 [ 46.559813] kmem_cache_alloc+0x16b/0x370 [ 46.560415] vm_area_dup+0x20/0x160 [ 46.560936] __split_vma+0x170/0x950 [ 46.561475] split_vma+0xc6/0x110 [ 46.561978] mprotect_fixup+0x8d2/0xb30 [ 46.562565] do_mprotect_pkey+0x87e/0xd40 [ 46.563174] __x64_sys_mprotect+0x78/0xc0 [ 46.563788] do_syscall_64+0x3f/0x90 [ 46.564328] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.565054] [ 46.565293] Freed by task 213: [ 46.565727] kasan_save_stack+0x22/0x50 [ 46.566283] kasan_set_track+0x25/0x30 [ 46.566833] kasan_save_free_info+0x2b/0x50 [ 46.567434] __kasan_slab_free+0x10a/0x190 [ 46.568030] kmem_cache_free+0x10d/0x4d0 [ 46.568596] rcu_core+0x8c8/0x2860 [ 46.569093] __do_softirq+0x1b7/0x7d4 [ 46.569625] [ 46.569865] Last potentially related work creation: [ 46.570514] kasan_save_stack+0x22/0x50 [ 46.571076] __kasan_record_aux_stack+0x8e/0xa0 [ 46.571731] __call_rcu_common.constprop.0+0x6a/0xb90 [ 46.572446] remove_vma+0x139/0x170 [ 46.572953] do_vmi_align_munmap+0xd4a/0x11f0 [ 46.573579] do_vmi_munmap+0x1f1/0x2b0 [ 46.574120] __vm_munmap+0x138/0x3a0 [ 46.574639] __x64_sys_munmap+0x59/0x80 [ 46.575194] do_syscall_64+0x3f/0x90 [ 46.575743] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 46.576475] [ 46.576723] The buggy address belongs to the object at ffff88800d7543a0 [ 46.576723] which belongs to the cache vm_area_struct of size 168 [ 46.578415] The buggy address is located 88 bytes inside of [ 46.578415] freed 168-byte region [ffff88800d7543a0, ffff88800d754448) [ 46.580032] [ 46.580278] The buggy address belongs to the physical page: [ 46.581033] page:000000008199d8df refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd754 [ 46.582283] memcg:ffff888019f08001 [ 46.582772] flags: 0x100000000000200(slab|node=0|zone=1) [ 46.583547] page_type: 0xffffffff() [ 46.584065] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 46.585123] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f08001 [ 46.586169] page dumped because: kasan: bad access detected [ 46.586939] [ 46.587194] Memory state around the buggy address: [ 46.587876] ffff88800d754280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 46.588870] ffff88800d754300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 46.589864] >ffff88800d754380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 46.590860] ^ [ 46.591872] ffff88800d754400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 46.592884] ffff88800d754480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 46.593871] ================================================================== [ 46.595096] Disabling lock debugging due to kernel taint [ 48.503045] BUG: Bad rss-counter state mm:0000000074d0b55c type:MM_FILEPAGES val:33 [ 48.503873] BUG: Bad rss-counter state mm:0000000074d0b55c type:MM_ANONPAGES val:22 [ 49.020515] BUG: Bad rss-counter state mm:00000000d771c457 type:MM_FILEPAGES val:33 [ 49.021673] BUG: Bad rss-counter state mm:00000000d771c457 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:65038' (ECDSA) to the list of known hosts. 2023/06/20 04:02:21 fuzzer started 2023/06/20 04:02:21 dialing manager at localhost:44161 2023/06/20 04:02:21 checking machine... 2023/06/20 04:02:21 checking revisions... [ 49.675079] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:02:21 testing simple program... [ 49.721373] cgroup: Unknown subsys name 'net' [ 49.755830] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:02:05 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888019b21680 RCX=0000000000000000 RDX=ffff888019f7b680 RSI=ffffffff81ef0d80 RDI=0000000000000007 RBP=ffff88800b508d38 RSP=ffff888019f77d00 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000004 R11=0000000000000000 R12=0000000000020000 R13=0000000000000004 R14=ffff88800e31cb80 R15=ffff88800f8b4000 RIP=ffffffff814c0800 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 00007ff66b010900 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=00007ff66b5c5650 CR3=00000000099dc000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007ffd32b0eaf8 CR3=000000001a12e000 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=2030323a32303a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3932 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3932325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030323a32303a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000