syzkaller login: [ 32.232260] BUG: Bad rss-counter state mm:0000000079f3f3a1 type:MM_FILEPAGES val:33 [ 32.233301] BUG: Bad rss-counter state mm:0000000079f3f3a1 type:MM_ANONPAGES val:22 [ 32.402805] ================================================================== [ 32.403731] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.404691] Read of size 8 at addr ffff888019a43310 by task sshd/219 [ 32.405472] [ 32.405787] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.406659] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.407648] Call Trace: [ 32.407975] [ 32.408265] dump_stack_lvl+0x91/0xf0 [ 32.408782] print_report+0xcc/0x620 [ 32.409269] ? __virt_addr_valid+0x102/0x340 [ 32.409834] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.410447] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.411069] kasan_report+0xbe/0xf0 [ 32.411551] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.412178] vma_interval_tree_remove+0xc75/0xec0 [ 32.412819] vma_prepare+0xc54/0x11a0 [ 32.413300] __split_vma+0x5af/0x950 [ 32.413789] ? __pfx___split_vma+0x10/0x10 [ 32.414336] ? find_held_lock+0x2c/0x110 [ 32.414859] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.415435] ? lock_is_held_type+0x9f/0x120 [ 32.415970] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.416595] ? mtree_range_walk+0x632/0x900 [ 32.417148] ? mas_walk+0x5c7/0x7c0 [ 32.417625] do_vmi_munmap+0x1f1/0x2b0 [ 32.418128] mmap_region+0x1f9/0x2660 [ 32.418612] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.419125] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.419839] ? __pfx_lock_acquire+0x10/0x10 [ 32.420377] ? __pfx_mmap_region+0x10/0x10 [ 32.420947] ? security_mmap_addr+0x7d/0xa0 [ 32.421493] ? get_unmapped_area+0x1f5/0x3f0 [ 32.422056] do_mmap+0x854/0xf00 [ 32.422501] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.422998] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.423576] ksys_mmap_pgoff+0x3af/0x500 [ 32.424095] do_syscall_64+0x3f/0x90 [ 32.424595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.425251] RIP: 0033:0x7f596c07bd82 [ 32.425706] 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 [ 32.427864] RSP: 002b:00007ffd997c3db8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.428799] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f596c07bd82 [ 32.429667] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f596b4b5000 [ 32.430529] RBP: 00007f596b4b5000 R08: 0000000000000009 R09: 0000000000001000 [ 32.431396] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b290b5f70 [ 32.432254] R13: 00007ffd997c3dd0 R14: 00007ffd997c3e00 R15: 00007ffd997c4160 [ 32.433144] [ 32.433442] [ 32.433661] Allocated by task 212: [ 32.434088] kasan_save_stack+0x22/0x50 [ 32.434595] kasan_set_track+0x25/0x30 [ 32.435101] __kasan_slab_alloc+0x59/0x70 [ 32.435631] kmem_cache_alloc+0x16b/0x370 [ 32.436164] vm_area_dup+0x20/0x160 [ 32.436628] __split_vma+0x170/0x950 [ 32.437113] split_vma+0xc6/0x110 [ 32.437556] mprotect_fixup+0x8d2/0xb30 [ 32.438073] do_mprotect_pkey+0x87e/0xd40 [ 32.438599] __x64_sys_mprotect+0x78/0xc0 [ 32.439136] do_syscall_64+0x3f/0x90 [ 32.439631] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.440279] [ 32.440505] Freed by task 209: [ 32.440899] kasan_save_stack+0x22/0x50 [ 32.441410] kasan_set_track+0x25/0x30 [ 32.441911] kasan_save_free_info+0x2b/0x50 [ 32.442462] __kasan_slab_free+0x10a/0x190 [ 32.443011] kmem_cache_free+0x10d/0x4d0 [ 32.443529] rcu_core+0x8c8/0x2860 [ 32.443977] __do_softirq+0x1b7/0x7d4 [ 32.444484] [ 32.444698] Last potentially related work creation: [ 32.445294] kasan_save_stack+0x22/0x50 [ 32.445802] __kasan_record_aux_stack+0x8e/0xa0 [ 32.446395] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.447046] remove_vma+0x139/0x170 [ 32.447502] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.448071] do_vmi_munmap+0x1f1/0x2b0 [ 32.448577] __vm_munmap+0x138/0x3a0 [ 32.449052] __x64_sys_munmap+0x59/0x80 [ 32.449557] do_syscall_64+0x3f/0x90 [ 32.450042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.450691] [ 32.450910] The buggy address belongs to the object at ffff888019a432b8 [ 32.450910] which belongs to the cache vm_area_struct of size 168 [ 32.452414] The buggy address is located 88 bytes inside of [ 32.452414] freed 168-byte region [ffff888019a432b8, ffff888019a43360) [ 32.453826] [ 32.454040] The buggy address belongs to the physical page: [ 32.454699] page:0000000078d62217 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19a43 [ 32.455805] memcg:ffff8880094c1001 [ 32.456239] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.456912] page_type: 0xffffffff() [ 32.457389] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.458319] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880094c1001 [ 32.459240] page dumped because: kasan: bad access detected [ 32.459917] [ 32.460139] Memory state around the buggy address: [ 32.460743] ffff888019a43200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 32.461628] ffff888019a43280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 32.462507] >ffff888019a43300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 32.463380] ^ [ 32.463857] ffff888019a43380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 32.464748] ffff888019a43400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 32.465625] ================================================================== [ 32.466615] Disabling lock debugging due to kernel taint [ 34.408138] BUG: Bad rss-counter state mm:0000000037cec481 type:MM_FILEPAGES val:33 [ 34.409545] BUG: Bad rss-counter state mm:0000000037cec481 type:MM_ANONPAGES val:22 [ 34.893373] BUG: Bad rss-counter state mm:0000000026df3e34 type:MM_FILEPAGES val:33 [ 34.894816] BUG: Bad rss-counter state mm:0000000026df3e34 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:9233' (ECDSA) to the list of known hosts. 2023/06/20 07:33:40 fuzzer started 2023/06/20 07:33:40 dialing manager at localhost:44161 2023/06/20 07:33:40 checking machine... 2023/06/20 07:33:40 checking revisions... [ 35.630400] kmemleak: Automatic memory scanning thread ended 2023/06/20 07:33:40 testing simple program... [ 35.681806] cgroup: Unknown subsys name 'net' [ 35.728312] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:33:38 Registers: info registers vcpu 0 RAX=ffff888016a67ca8 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888016a67c01 RSI=ffff888016a67c30 RDI=ffff888016a67c30 RBP=ffff888016a67880 RSP=ffff888016a677b0 R8 =0000000000000001 R9 =ffff888016a67868 R10=0000000000038001 R11=0000000000021edf R12=ffff888016a67888 R13=ffff888016a67870 R14=ffff888016a67c30 R15=ffff888016a67828 RIP=ffffffff8112fbf3 RFL=00000202 [-------] 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 00007fb4fe03d900 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=00007ffeb737f000 CR3=0000000017d8a000 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=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=00007f0a95eb6740 CR3=000000000c680000 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=2030343a33333a3730203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039333a33333a3730203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000