syzkaller login: [ 33.794069] BUG: Bad rss-counter state mm:0000000074ede5c0 type:MM_FILEPAGES val:33 [ 33.795261] BUG: Bad rss-counter state mm:0000000074ede5c0 type:MM_ANONPAGES val:22 [ 33.961409] ================================================================== [ 33.962391] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.963390] Read of size 8 at addr ffff88800ed0e228 by task sshd/220 [ 33.964332] [ 33.964565] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.965502] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.966534] Call Trace: [ 33.966871] [ 33.967180] dump_stack_lvl+0x91/0xf0 [ 33.967695] print_report+0xcc/0x620 [ 33.968215] ? __virt_addr_valid+0x102/0x340 [ 33.968803] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.969465] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.970127] kasan_report+0xbe/0xf0 [ 33.970634] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.971308] vma_interval_tree_remove+0xc75/0xec0 [ 33.971950] vma_prepare+0xc54/0x11a0 [ 33.972477] __split_vma+0x5af/0x950 [ 33.972996] ? __pfx___split_vma+0x10/0x10 [ 33.973580] ? find_held_lock+0x2c/0x110 [ 33.974154] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.974774] ? lock_is_held_type+0x9f/0x120 [ 33.975359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.976018] ? mtree_range_walk+0x632/0x900 [ 33.976615] ? mas_walk+0x5c7/0x7c0 [ 33.977152] do_vmi_munmap+0x1f1/0x2b0 [ 33.977689] mmap_region+0x1f9/0x2660 [ 33.978223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.978780] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.979550] ? __pfx_lock_acquire+0x10/0x10 [ 33.980134] ? __pfx_mmap_region+0x10/0x10 [ 33.980712] ? security_mmap_addr+0x7d/0xa0 [ 33.981305] ? get_unmapped_area+0x1f5/0x3f0 [ 33.981902] do_mmap+0x854/0xf00 [ 33.982385] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.982929] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.983543] ksys_mmap_pgoff+0x3af/0x500 [ 33.984100] do_syscall_64+0x3f/0x90 [ 33.984623] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.985344] RIP: 0033:0x7f1d93d08d82 [ 33.985844] 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 [ 33.988148] RSP: 002b:00007fffc0395598 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.989155] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d93d08d82 [ 33.990086] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d93142000 [ 33.991013] RBP: 00007f1d93142000 R08: 0000000000000009 R09: 0000000000001000 [ 33.991938] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556fbbae4ec0 [ 33.992864] R13: 00007fffc03955b0 R14: 00007fffc03955e0 R15: 00007fffc0395940 [ 33.993816] [ 33.994139] [ 33.994374] Allocated by task 213: [ 33.994844] kasan_save_stack+0x22/0x50 [ 33.995402] kasan_set_track+0x25/0x30 [ 33.995949] __kasan_slab_alloc+0x59/0x70 [ 33.996523] kmem_cache_alloc+0x16b/0x370 [ 33.997102] vm_area_dup+0x20/0x160 [ 33.997602] __split_vma+0x170/0x950 [ 33.998120] split_vma+0xc6/0x110 [ 33.998604] mprotect_fixup+0x8d2/0xb30 [ 33.999151] do_mprotect_pkey+0x87e/0xd40 [ 33.999726] __x64_sys_mprotect+0x78/0xc0 [ 34.000293] do_syscall_64+0x3f/0x90 [ 34.000811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.001528] [ 34.001762] Freed by task 10: [ 34.002181] kasan_save_stack+0x22/0x50 [ 34.002732] kasan_set_track+0x25/0x30 [ 34.003272] kasan_save_free_info+0x2b/0x50 [ 34.003867] __kasan_slab_free+0x10a/0x190 [ 34.004445] kmem_cache_free+0x10d/0x4d0 [ 34.004997] rcu_core+0x8c8/0x2860 [ 34.005491] __do_softirq+0x1b7/0x7d4 [ 34.006011] [ 34.006245] Last potentially related work creation: [ 34.006887] kasan_save_stack+0x22/0x50 [ 34.007439] __kasan_record_aux_stack+0x8e/0xa0 [ 34.008074] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.008776] remove_vma+0x139/0x170 [ 34.009287] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.009899] do_vmi_munmap+0x1f1/0x2b0 [ 34.010437] __vm_munmap+0x138/0x3a0 [ 34.010948] __x64_sys_munmap+0x59/0x80 [ 34.011492] do_syscall_64+0x3f/0x90 [ 34.012031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.012731] [ 34.012969] The buggy address belongs to the object at ffff88800ed0e1d0 [ 34.012969] which belongs to the cache vm_area_struct of size 168 [ 34.014580] The buggy address is located 88 bytes inside of [ 34.014580] freed 168-byte region [ffff88800ed0e1d0, ffff88800ed0e278) [ 34.016128] [ 34.016364] The buggy address belongs to the physical page: [ 34.017093] page:000000005fb278b8 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xed0e [ 34.018286] memcg:ffff8880197bcd01 [ 34.018754] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.019535] page_type: 0xffffffff() [ 34.020025] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.021006] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880197bcd01 [ 34.021978] page dumped because: kasan: bad access detected [ 34.022679] [ 34.022906] Memory state around the buggy address: [ 34.023522] ffff88800ed0e100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.024465] ffff88800ed0e180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 34.025409] >ffff88800ed0e200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 34.026339] ^ [ 34.026944] ffff88800ed0e280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 34.027877] ffff88800ed0e300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 34.028814] ================================================================== [ 34.030047] Disabling lock debugging due to kernel taint [ 36.079460] BUG: Bad rss-counter state mm:000000007ad785d4 type:MM_FILEPAGES val:33 [ 36.080672] BUG: Bad rss-counter state mm:000000007ad785d4 type:MM_ANONPAGES val:22 [ 36.490473] BUG: Bad rss-counter state mm:00000000d69513ac type:MM_FILEPAGES val:33 [ 36.491668] BUG: Bad rss-counter state mm:00000000d69513ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3040' (ECDSA) to the list of known hosts. 2023/06/20 03:02:14 fuzzer started 2023/06/20 03:02:15 dialing manager at localhost:44161 2023/06/20 03:02:15 checking machine... 2023/06/20 03:02:15 checking revisions... [ 37.247848] kmemleak: Automatic memory scanning thread ended 2023/06/20 03:02:15 testing simple program... [ 37.305707] cgroup: Unknown subsys name 'net' [ 37.353897] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:02:11 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88800ed30500 RCX=0000000000000000 RDX=1ffff11001da60a0 RSI=ffffffff81862d15 RDI=ffffffff849384c0 RBP=0000000000000000 RSP=ffff888016f7fd78 R8 =ffff88800ed30698 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000001000 R13=000055ce7454d4b0 R14=ffff888016f7fec8 R15=0000000000000001 RIP=ffffffff81862d46 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 00007f762ed94900 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=00007ffdf0ade000 CR3=000000000f2a0000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 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=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=00007f7fbb79e4a0 CR3=000000000e858000 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=2034313a32303a3330203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034313a32303a3330203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000