syzkaller login: [ 35.858793] BUG: Bad rss-counter state mm:0000000009c87d27 type:MM_FILEPAGES val:33 [ 35.860123] BUG: Bad rss-counter state mm:0000000009c87d27 type:MM_ANONPAGES val:22 [ 36.006752] ================================================================== [ 36.007891] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.009035] Read of size 8 at addr ffff88801593e798 by task sshd/219 [ 36.010134] [ 36.010401] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.011487] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.012531] Call Trace: [ 36.012870] <TASK> [ 36.013164] dump_stack_lvl+0x91/0xf0 [ 36.013678] print_report+0xcc/0x620 [ 36.014194] ? __virt_addr_valid+0x102/0x340 [ 36.014770] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.015430] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.016089] kasan_report+0xbe/0xf0 [ 36.016591] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.017245] vma_interval_tree_remove+0xc75/0xec0 [ 36.017880] vma_prepare+0xc54/0x11a0 [ 36.018381] __split_vma+0x5af/0x950 [ 36.018887] ? __pfx___split_vma+0x10/0x10 [ 36.019456] ? find_held_lock+0x2c/0x110 [ 36.020007] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.020601] ? lock_is_held_type+0x9f/0x120 [ 36.021173] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.021814] ? mtree_range_walk+0x632/0x900 [ 36.022405] ? mas_walk+0x5c7/0x7c0 [ 36.022908] do_vmi_munmap+0x1f1/0x2b0 [ 36.023444] mmap_region+0x1f9/0x2660 [ 36.023944] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.024490] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.025243] ? __pfx_lock_acquire+0x10/0x10 [ 36.025805] ? __pfx_mmap_region+0x10/0x10 [ 36.026368] ? security_mmap_addr+0x7d/0xa0 [ 36.026927] ? get_unmapped_area+0x1f5/0x3f0 [ 36.027513] do_mmap+0x854/0xf00 [ 36.027979] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.028504] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.029088] ksys_mmap_pgoff+0x3af/0x500 [ 36.029621] do_syscall_64+0x3f/0x90 [ 36.030118] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.030803] RIP: 0033:0x7f621e854d82 [ 36.031293] 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 [ 36.033423] RSP: 002b:00007fff2fb79a28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.034333] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f621e854d82 [ 36.035185] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f621dc8e000 [ 36.036050] RBP: 00007f621dc8e000 R08: 0000000000000009 R09: 0000000000001000 [ 36.036893] R10: 0000000000000812 R11: 0000000000000206 R12: 000056514c366ec0 [ 36.037740] R13: 00007fff2fb79a40 R14: 00007fff2fb79a70 R15: 00007fff2fb79dd0 [ 36.038600] </TASK> [ 36.038898] [ 36.039115] Allocated by task 212: [ 36.039554] kasan_save_stack+0x22/0x50 [ 36.040054] kasan_set_track+0x25/0x30 [ 36.040548] __kasan_slab_alloc+0x59/0x70 [ 36.041068] kmem_cache_alloc+0x16b/0x370 [ 36.041607] vm_area_dup+0x20/0x160 [ 36.042068] __split_vma+0x170/0x950 [ 36.042552] split_vma+0xc6/0x110 [ 36.042995] mprotect_fixup+0x8d2/0xb30 [ 36.043500] do_mprotect_pkey+0x87e/0xd40 [ 36.044027] __x64_sys_mprotect+0x78/0xc0 [ 36.044545] do_syscall_64+0x3f/0x90 [ 36.045019] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.045661] [ 36.045875] Freed by task 212: [ 36.046265] kasan_save_stack+0x22/0x50 [ 36.046774] kasan_set_track+0x25/0x30 [ 36.047281] kasan_save_free_info+0x2b/0x50 [ 36.047823] __kasan_slab_free+0x10a/0x190 [ 36.048351] kmem_cache_free+0x10d/0x4d0 [ 36.048856] rcu_core+0x8c8/0x2860 [ 36.049299] __do_softirq+0x1b7/0x7d4 [ 36.049781] [ 36.049996] Last potentially related work creation: [ 36.050587] kasan_save_stack+0x22/0x50 [ 36.051152] __kasan_record_aux_stack+0x8e/0xa0 [ 36.051739] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.052390] remove_vma+0x139/0x170 [ 36.052842] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.053405] do_vmi_munmap+0x1f1/0x2b0 [ 36.053890] __vm_munmap+0x138/0x3a0 [ 36.054355] __x64_sys_munmap+0x59/0x80 [ 36.054852] do_syscall_64+0x3f/0x90 [ 36.055337] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.055990] [ 36.056208] The buggy address belongs to the object at ffff88801593e740 [ 36.056208] which belongs to the cache vm_area_struct of size 168 [ 36.057679] The buggy address is located 88 bytes inside of [ 36.057679] freed 168-byte region [ffff88801593e740, ffff88801593e7e8) [ 36.059093] [ 36.059318] The buggy address belongs to the physical page: [ 36.059978] page:000000003f6b9275 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1593e [ 36.061066] memcg:ffff88800f0b4401 [ 36.061491] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.062133] page_type: 0xffffffff() [ 36.062588] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.063530] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0b4401 [ 36.064442] page dumped because: kasan: bad access detected [ 36.065097] [ 36.065315] Memory state around the buggy address: [ 36.065888] ffff88801593e680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.066746] ffff88801593e700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 36.067606] >ffff88801593e780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 36.068449] ^ [ 36.068939] ffff88801593e800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 36.069790] ffff88801593e880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 36.070637] ================================================================== [ 36.071558] Disabling lock debugging due to kernel taint [ 38.459471] BUG: Bad rss-counter state mm:000000004dc2b687 type:MM_FILEPAGES val:33 [ 38.460241] BUG: Bad rss-counter state mm:000000004dc2b687 type:MM_ANONPAGES val:22 [ 38.879599] BUG: Bad rss-counter state mm:000000005131c20e type:MM_FILEPAGES val:33 [ 38.880598] BUG: Bad rss-counter state mm:000000005131c20e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59300' (ECDSA) to the list of known hosts. 2023/06/20 05:42:12 fuzzer started 2023/06/20 05:42:12 dialing manager at localhost:44161 2023/06/20 05:42:12 checking machine... 2023/06/20 05:42:12 checking revisions... [ 39.539697] kmemleak: Automatic memory scanning thread ended 2023/06/20 05:42:12 testing simple program... [ 39.589833] cgroup: Unknown subsys name 'net' [ 39.629309] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 05:42:07 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdc0e1ea98 CR3=0000000005482000 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=00007f94b6f43510000055fb25c60790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff88800f319e60 RCX=ffffffff818e9b7c RDX=ffff88800ef61b40 RSI=0000000000000000 RDI=0000000000000004 RBP=0000000000000008 RSP=ffff88801814fd50 R8 =0000000000000004 R9 =0000000000000004 R10=0000000000000000 R11=0000000000000000 R12=ffff88800f319e00 R13=0000000000000004 R14=0000000000000000 R15=0000000000000400 RIP=ffffffff814c07e4 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 00007f1d30da2900 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=00007f1d3135a0b0 CR3=000000000caa2000 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=00000000000000000000000000000000 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000