syzkaller login: [ 68.801113] sshd (222) used greatest stack depth: 24128 bytes left [ 68.803039] BUG: Bad rss-counter state mm:000000000d077e08 type:MM_FILEPAGES val:33 [ 68.803992] BUG: Bad rss-counter state mm:000000000d077e08 type:MM_ANONPAGES val:22 [ 68.980757] ================================================================== [ 68.981845] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 68.982856] Read of size 8 at addr ffff88801a038d08 by task sshd/229 [ 68.983745] [ 68.983984] CPU: 0 PID: 229 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 68.984922] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 68.985967] Call Trace: [ 68.986315] [ 68.986621] dump_stack_lvl+0x91/0xf0 [ 68.987156] print_report+0xcc/0x620 [ 68.987680] ? __virt_addr_valid+0x102/0x340 [ 68.988270] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.988951] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.989623] kasan_report+0xbe/0xf0 [ 68.990146] ? vma_interval_tree_remove+0xc75/0xec0 [ 68.990823] vma_interval_tree_remove+0xc75/0xec0 [ 68.991483] vma_prepare+0xc54/0x11a0 [ 68.992007] __split_vma+0x5af/0x950 [ 68.992531] ? __pfx___split_vma+0x10/0x10 [ 68.993112] ? find_held_lock+0x2c/0x110 [ 68.993680] do_vmi_align_munmap+0x2ba/0x11f0 [ 68.994301] ? lock_is_held_type+0x9f/0x120 [ 68.994894] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 68.995553] ? mtree_range_walk+0x632/0x900 [ 68.996160] ? mas_walk+0x5c7/0x7c0 [ 68.996687] do_vmi_munmap+0x1f1/0x2b0 [ 68.997228] mmap_region+0x1f9/0x2660 [ 68.997761] ? vm_mmap_pgoff+0x15c/0x3a0 [ 68.998324] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 68.999109] ? __pfx_lock_acquire+0x10/0x10 [ 68.999683] ? __pfx_mmap_region+0x10/0x10 [ 69.000267] ? security_mmap_addr+0x7d/0xa0 [ 69.000868] ? get_unmapped_area+0x1f5/0x3f0 [ 69.001470] do_mmap+0x854/0xf00 [ 69.001952] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.002491] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.003115] ksys_mmap_pgoff+0x3af/0x500 [ 69.003674] do_syscall_64+0x3f/0x90 [ 69.004202] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.004921] RIP: 0033:0x7f72ae2c0d82 [ 69.005418] 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 [ 69.007752] RSP: 002b:00007ffc764f5488 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.008751] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f72ae2c0d82 [ 69.009684] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f72ad6fa000 [ 69.010613] RBP: 00007f72ad6fa000 R08: 0000000000000009 R09: 0000000000001000 [ 69.011542] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e643d25ec0 [ 69.012477] R13: 00007ffc764f54a0 R14: 00007ffc764f54d0 R15: 00007ffc764f5830 [ 69.013414] [ 69.013730] [ 69.013966] Allocated by task 222: [ 69.014436] kasan_save_stack+0x22/0x50 [ 69.014989] kasan_set_track+0x25/0x30 [ 69.015524] __kasan_slab_alloc+0x59/0x70 [ 69.016097] kmem_cache_alloc+0x16b/0x370 [ 69.016667] vm_area_dup+0x20/0x160 [ 69.017165] __split_vma+0x170/0x950 [ 69.017672] split_vma+0xc6/0x110 [ 69.018159] mprotect_fixup+0x8d2/0xb30 [ 69.018712] do_mprotect_pkey+0x87e/0xd40 [ 69.019281] __x64_sys_mprotect+0x78/0xc0 [ 69.019847] do_syscall_64+0x3f/0x90 [ 69.020365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.021088] [ 69.021322] Freed by task 222: [ 69.021754] kasan_save_stack+0x22/0x50 [ 69.022298] kasan_set_track+0x25/0x30 [ 69.022836] kasan_save_free_info+0x2b/0x50 [ 69.023415] __kasan_slab_free+0x10a/0x190 [ 69.023994] kmem_cache_free+0x10d/0x4d0 [ 69.024553] rcu_core+0x8c8/0x2860 [ 69.025039] __do_softirq+0x1b7/0x7d4 [ 69.025555] [ 69.025790] Last potentially related work creation: [ 69.026432] kasan_save_stack+0x22/0x50 [ 69.026977] __kasan_record_aux_stack+0x8e/0xa0 [ 69.027599] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.028298] remove_vma+0x139/0x170 [ 69.028808] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.029414] do_vmi_munmap+0x1f1/0x2b0 [ 69.029944] __vm_munmap+0x138/0x3a0 [ 69.030451] __x64_sys_munmap+0x59/0x80 [ 69.030991] do_syscall_64+0x3f/0x90 [ 69.031511] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.032204] [ 69.032443] The buggy address belongs to the object at ffff88801a038cb0 [ 69.032443] which belongs to the cache vm_area_struct of size 168 [ 69.034044] The buggy address is located 88 bytes inside of [ 69.034044] freed 168-byte region [ffff88801a038cb0, ffff88801a038d58) [ 69.035570] [ 69.035803] The buggy address belongs to the physical page: [ 69.036526] page:00000000106fd065 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a038 [ 69.037715] memcg:ffff888019e4d401 [ 69.038182] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.038887] page_type: 0xffffffff() [ 69.039377] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.040381] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e4d401 [ 69.041385] page dumped because: kasan: bad access detected [ 69.042098] [ 69.042333] Memory state around the buggy address: [ 69.042969] ffff88801a038c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.043891] ffff88801a038c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.044822] >ffff88801a038d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.045735] ^ [ 69.046208] ffff88801a038d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 69.047127] ffff88801a038e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 69.048049] ================================================================== [ 69.049189] Disabling lock debugging due to kernel taint [ 70.965302] BUG: Bad rss-counter state mm:0000000009238a39 type:MM_FILEPAGES val:33 [ 70.966218] BUG: Bad rss-counter state mm:0000000009238a39 type:MM_ANONPAGES val:22 [ 71.523034] BUG: Bad rss-counter state mm:00000000cc1077d7 type:MM_FILEPAGES val:33 [ 71.524210] BUG: Bad rss-counter state mm:00000000cc1077d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:48606' (ECDSA) to the list of known hosts. 2023/06/21 06:29:04 fuzzer started 2023/06/21 06:29:04 dialing manager at localhost:36067 2023/06/21 06:29:04 checking machine... 2023/06/21 06:29:04 checking revisions... [ 72.158184] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:29:04 testing simple program... [ 72.206102] cgroup: Unknown subsys name 'net' [ 72.247935] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:29:04 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88806ce35000 RCX=1ffffffff0ba7530 RDX=0000000000000000 RSI=ffffffff81007b90 RDI=0000000000000007 RBP=00007f15d281420c RSP=ffff888015dff418 R8 =0000000000000007 R9 =ffffffffff600000 R10=00007f15d2814000 R11=00000000000b6a61 R12=ffff888015dff530 R13=0000000000000000 R14=ffff8880134d51c0 R15=0000000000092cc0 RIP=ffffffff8135b960 RFL=00000216 [----AP-] 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 00007f15d2321900 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=00007f15d28d6650 CR3=000000000c4cc000 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=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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007ffd55f6df08 CR3=000000000debe000 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=2034303a39323a3630203132206e754a XMM01=657463656e6e6f63736944203a5d3833 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3833325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033303a39323a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000