syzkaller login: [ 30.864461] BUG: Bad rss-counter state mm:000000007dd24dfd type:MM_FILEPAGES val:33 [ 30.865505] BUG: Bad rss-counter state mm:000000007dd24dfd type:MM_ANONPAGES val:22 [ 30.912110] ================================================================== [ 30.912941] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.913812] Read of size 8 at addr ffff88800ddf5d08 by task sshd/221 [ 30.914524] [ 30.914732] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.915798] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.917469] Call Trace: [ 30.918000] [ 30.918478] dump_stack_lvl+0x91/0xf0 [ 30.919181] print_report+0xcc/0x620 [ 30.919887] ? __virt_addr_valid+0x102/0x340 [ 30.920679] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.921569] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.922461] kasan_report+0xbe/0xf0 [ 30.923139] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.924050] vma_interval_tree_remove+0xc75/0xec0 [ 30.924890] vma_prepare+0xc54/0x11a0 [ 30.925682] __split_vma+0x5af/0x950 [ 30.926350] ? __pfx___split_vma+0x10/0x10 [ 30.927108] ? find_held_lock+0x2c/0x110 [ 30.927888] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.928697] ? lock_is_held_type+0x9f/0x120 [ 30.929466] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.930329] ? mtree_range_walk+0x632/0x900 [ 30.931107] ? mas_walk+0x5c7/0x7c0 [ 30.931787] do_vmi_munmap+0x1f1/0x2b0 [ 30.932489] mmap_region+0x1f9/0x2660 [ 30.933170] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.933897] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.934918] ? __pfx_lock_acquire+0x10/0x10 [ 30.935673] ? __pfx_mmap_region+0x10/0x10 [ 30.936426] ? security_mmap_addr+0x7d/0xa0 [ 30.937183] ? get_unmapped_area+0x1f5/0x3f0 [ 30.937954] do_mmap+0x854/0xf00 [ 30.938571] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.939277] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.940092] ksys_mmap_pgoff+0x3af/0x500 [ 30.940815] do_syscall_64+0x3f/0x90 [ 30.941486] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.942394] RIP: 0033:0x7f553acb6d82 [ 30.943040] 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 [ 30.946068] RSP: 002b:00007ffe40155fa8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.947327] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f553acb6d82 [ 30.948514] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f553a0f0000 [ 30.949700] RBP: 00007f553a0f0000 R08: 0000000000000009 R09: 0000000000001000 [ 30.950917] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564b25b7bf70 [ 30.952149] R13: 00007ffe40155fc0 R14: 00007ffe40155ff0 R15: 00007ffe40156350 [ 30.953366] [ 30.953778] [ 30.954072] Allocated by task 214: [ 30.954677] kasan_save_stack+0x22/0x50 [ 30.955379] kasan_set_track+0x25/0x30 [ 30.956067] __kasan_slab_alloc+0x59/0x70 [ 30.956795] kmem_cache_alloc+0x16b/0x370 [ 30.957512] vm_area_dup+0x20/0x160 [ 30.958136] __split_vma+0x170/0x950 [ 30.958789] split_vma+0xc6/0x110 [ 30.959400] mprotect_fixup+0x8d2/0xb30 [ 30.960122] do_mprotect_pkey+0x87e/0xd40 [ 30.960850] __x64_sys_mprotect+0x78/0xc0 [ 30.961571] do_syscall_64+0x3f/0x90 [ 30.962223] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.963123] [ 30.963416] Freed by task 214: [ 30.963975] kasan_save_stack+0x22/0x50 [ 30.964675] kasan_set_track+0x25/0x30 [ 30.965359] kasan_save_free_info+0x2b/0x50 [ 30.966109] __kasan_slab_free+0x10a/0x190 [ 30.966853] kmem_cache_free+0x10d/0x4d0 [ 30.967573] rcu_core+0x8c8/0x2860 [ 30.968050] __do_softirq+0x1b7/0x7d4 [ 30.968635] [ 30.968868] Last potentially related work creation: [ 30.969483] kasan_save_stack+0x22/0x50 [ 30.970014] __kasan_record_aux_stack+0x8e/0xa0 [ 30.970614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.971286] remove_vma+0x139/0x170 [ 30.971783] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.972407] do_vmi_munmap+0x1f1/0x2b0 [ 30.972922] __vm_munmap+0x138/0x3a0 [ 30.973419] __x64_sys_munmap+0x59/0x80 [ 30.973946] do_syscall_64+0x3f/0x90 [ 30.974443] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.975118] [ 30.975347] Second to last potentially related work creation: [ 30.976118] kasan_save_stack+0x22/0x50 [ 30.976723] __kasan_record_aux_stack+0x8e/0xa0 [ 30.977344] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.978042] remove_vma+0x139/0x170 [ 30.978539] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.979142] do_vmi_munmap+0x1f1/0x2b0 [ 30.979679] mmap_region+0x1f9/0x2660 [ 30.980208] do_mmap+0x854/0xf00 [ 30.980725] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.981261] ksys_mmap_pgoff+0x3af/0x500 [ 30.981809] do_syscall_64+0x3f/0x90 [ 30.982330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.983033] [ 30.983272] The buggy address belongs to the object at ffff88800ddf5cb0 [ 30.983272] which belongs to the cache vm_area_struct of size 168 [ 30.984924] The buggy address is located 88 bytes inside of [ 30.984924] freed 168-byte region [ffff88800ddf5cb0, ffff88800ddf5d58) [ 30.986483] [ 30.986720] The buggy address belongs to the physical page: [ 30.987438] page:00000000f12ddf18 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddf5 [ 30.988612] memcg:ffff88800de53b01 [ 30.989070] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.989824] page_type: 0xffffffff() [ 30.990321] raw: 0100000000000200 ffff8880087a0c80 dead000000000100 dead000000000122 [ 30.991310] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de53b01 [ 30.992273] page dumped because: kasan: bad access detected [ 30.992981] [ 30.993217] Memory state around the buggy address: [ 30.993891] ffff88800ddf5c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 30.994817] ffff88800ddf5c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 30.995771] >ffff88800ddf5d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 30.996700] ^ [ 30.997173] ffff88800ddf5d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.998137] ffff88800ddf5e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.999044] ================================================================== [ 31.000515] Disabling lock debugging due to kernel taint [ 33.406574] BUG: Bad rss-counter state mm:00000000d71cffe2 type:MM_FILEPAGES val:33 [ 33.407648] BUG: Bad rss-counter state mm:00000000d71cffe2 type:MM_ANONPAGES val:22 [ 33.973724] BUG: Bad rss-counter state mm:00000000e9580459 type:MM_FILEPAGES val:33 [ 33.974897] BUG: Bad rss-counter state mm:00000000e9580459 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10261' (ECDSA) to the list of known hosts. 2023/06/21 10:48:13 fuzzer started 2023/06/21 10:48:14 dialing manager at localhost:36067 2023/06/21 10:48:14 checking machine... 2023/06/21 10:48:14 checking revisions... [ 34.623251] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:48:14 testing simple program... [ 34.676211] cgroup: Unknown subsys name 'net' [ 34.739626] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:48:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85652c60 RCX=0000000000000000 RDX=ffff88800c609b40 RSI=ffffffff814c8471 RDI=ffff88800c609f34 RBP=00007efc9c8e6366 RSP=ffff88800ea2f7a0 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=00007efc9c8e6366 R13=0000000000000000 R14=ffff88800c609b40 R15=ffff88801b261850 RIP=ffffffff814c8474 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 00007efc9c3f3900 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=00007fff57594000 CR3=000000000ed54000 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=ffffffff8180c6b9 RBX=ffffffff85dfe020 RCX=ffffffff8180c6a1 RDX=0000000000000000 RSI=ffffffff86138e62 RDI=ffffffff85dfe000 RBP=ffffffff85dfe01c RSP=ffff88806cf099e0 R8 =ffffffff86138e62 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8f R12=ffffffff85dfe024 R13=ffffffff85dfe000 R14=ffffffff85dfe018 R15=dffffc0000000000 RIP=ffffffff8112fc99 RFL=00000297 [--S-APC] 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=00007f7fe6f351e0 CR3=000000000e3c2000 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=2033313a38343a3031203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a38343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000