syzkaller login: [ 33.572656] BUG: Bad rss-counter state mm:00000000bb116edf type:MM_FILEPAGES val:33 [ 33.573704] BUG: Bad rss-counter state mm:00000000bb116edf type:MM_ANONPAGES val:22 [ 33.739228] ================================================================== [ 33.740192] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.741171] Read of size 8 at addr ffff88801991b140 by task sshd/220 [ 33.742067] [ 33.742293] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.743180] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.744204] Call Trace: [ 33.744536] [ 33.744832] dump_stack_lvl+0x91/0xf0 [ 33.745341] print_report+0xcc/0x620 [ 33.745840] ? __virt_addr_valid+0x102/0x340 [ 33.746410] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.747044] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.747720] kasan_report+0xbe/0xf0 [ 33.748209] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.748856] vma_interval_tree_remove+0xc75/0xec0 [ 33.749477] vma_prepare+0xc54/0x11a0 [ 33.749979] __split_vma+0x5af/0x950 [ 33.750467] ? __pfx___split_vma+0x10/0x10 [ 33.751020] ? find_held_lock+0x2c/0x110 [ 33.751577] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.752164] ? lock_is_held_type+0x9f/0x120 [ 33.752729] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.753357] ? mtree_range_walk+0x632/0x900 [ 33.753931] ? mas_walk+0x5c7/0x7c0 [ 33.754424] do_vmi_munmap+0x1f1/0x2b0 [ 33.754935] mmap_region+0x1f9/0x2660 [ 33.755453] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.755986] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.756721] ? __pfx_lock_acquire+0x10/0x10 [ 33.757279] ? __pfx_mmap_region+0x10/0x10 [ 33.757843] ? security_mmap_addr+0x7d/0xa0 [ 33.758399] ? get_unmapped_area+0x1f5/0x3f0 [ 33.758969] do_mmap+0x854/0xf00 [ 33.759451] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.759969] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.760550] ksys_mmap_pgoff+0x3af/0x500 [ 33.761075] do_syscall_64+0x3f/0x90 [ 33.761574] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.762238] RIP: 0033:0x7f9ea5ce9d82 [ 33.762712] 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 [ 33.764939] RSP: 002b:00007ffcb791c878 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.765879] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ea5ce9d82 [ 33.766765] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ea5123000 [ 33.767654] RBP: 00007f9ea5123000 R08: 0000000000000009 R09: 0000000000001000 [ 33.768537] R10: 0000000000000812 R11: 0000000000000206 R12: 000055afef48aec0 [ 33.769416] R13: 00007ffcb791c890 R14: 00007ffcb791c8c0 R15: 00007ffcb791cc20 [ 33.770304] [ 33.770608] [ 33.770830] Allocated by task 213: [ 33.771275] kasan_save_stack+0x22/0x50 [ 33.771819] kasan_set_track+0x25/0x30 [ 33.772328] __kasan_slab_alloc+0x59/0x70 [ 33.772870] kmem_cache_alloc+0x16b/0x370 [ 33.773405] vm_area_dup+0x20/0x160 [ 33.773863] __split_vma+0x170/0x950 [ 33.774328] split_vma+0xc6/0x110 [ 33.774767] mprotect_fixup+0x8d2/0xb30 [ 33.775267] do_mprotect_pkey+0x87e/0xd40 [ 33.775799] __x64_sys_mprotect+0x78/0xc0 [ 33.776329] do_syscall_64+0x3f/0x90 [ 33.776802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.777449] [ 33.777668] Freed by task 209: [ 33.778068] kasan_save_stack+0x22/0x50 [ 33.778566] kasan_set_track+0x25/0x30 [ 33.779067] kasan_save_free_info+0x2b/0x50 [ 33.779644] __kasan_slab_free+0x10a/0x190 [ 33.780209] kmem_cache_free+0x10d/0x4d0 [ 33.780727] rcu_core+0x8c8/0x2860 [ 33.781173] __do_softirq+0x1b7/0x7d4 [ 33.781652] [ 33.781867] Last potentially related work creation: [ 33.782460] kasan_save_stack+0x22/0x50 [ 33.782964] __kasan_record_aux_stack+0x8e/0xa0 [ 33.783564] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.784213] remove_vma+0x139/0x170 [ 33.784665] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.785231] do_vmi_munmap+0x1f1/0x2b0 [ 33.785729] __vm_munmap+0x138/0x3a0 [ 33.786204] __x64_sys_munmap+0x59/0x80 [ 33.786715] do_syscall_64+0x3f/0x90 [ 33.787193] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.787843] [ 33.788058] The buggy address belongs to the object at ffff88801991b0e8 [ 33.788058] which belongs to the cache vm_area_struct of size 168 [ 33.789555] The buggy address is located 88 bytes inside of [ 33.789555] freed 168-byte region [ffff88801991b0e8, ffff88801991b190) [ 33.790948] [ 33.791168] The buggy address belongs to the physical page: [ 33.791854] page:0000000064b59531 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1991b [ 33.792949] memcg:ffff888016ab8801 [ 33.793371] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.794019] page_type: 0xffffffff() [ 33.794470] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.795414] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016ab8801 [ 33.796329] page dumped because: kasan: bad access detected [ 33.797002] [ 33.797224] Memory state around the buggy address: [ 33.797809] ffff88801991b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.798680] ffff88801991b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.799554] >ffff88801991b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.800409] ^ [ 33.801047] ffff88801991b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.801909] ffff88801991b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.802765] ================================================================== [ 33.803787] Disabling lock debugging due to kernel taint [ 36.392271] BUG: Bad rss-counter state mm:000000005d078fc6 type:MM_FILEPAGES val:33 [ 36.393028] BUG: Bad rss-counter state mm:000000005d078fc6 type:MM_ANONPAGES val:22 [ 36.959442] BUG: Bad rss-counter state mm:00000000e0d180a3 type:MM_FILEPAGES val:33 [ 36.960250] BUG: Bad rss-counter state mm:00000000e0d180a3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40403' (ECDSA) to the list of known hosts. 2023/06/19 23:14:35 fuzzer started 2023/06/19 23:14:36 dialing manager at localhost:44161 2023/06/19 23:14:36 checking machine... 2023/06/19 23:14:36 checking revisions... [ 37.489833] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:14:36 testing simple program... [ 37.536827] cgroup: Unknown subsys name 'net' [ 37.605030] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:14:33 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000718 RCX=0000000000000400 RDX=00000000030347b8 RSI=0000000000000718 RDI=ffff888018dc9000 RBP=ffff888008442000 RSP=ffff888015c27cc0 R8 =ffff888015c27ca0 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffff888018dc9000 R13=0000000000000dc0 R14=ffffffff83646a97 R15=0000000000000001 RIP=ffffffff8180c3de 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 00007ff8354ba900 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=00007ff835a720b0 CR3=000000001c8c6000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=ffff888008c58400 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=00007fff601d2f38 CR3=0000000018d14000 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=2035333a34313a3332203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035333a34313a3332203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000