syzkaller login: [ 42.850761] BUG: Bad rss-counter state mm:00000000171f869a type:MM_FILEPAGES val:33 [ 42.851963] BUG: Bad rss-counter state mm:00000000171f869a type:MM_ANONPAGES val:22 [ 43.010027] ================================================================== [ 43.010935] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.011866] Read of size 8 at addr ffff888016153310 by task sshd/220 [ 43.012640] [ 43.012857] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.013892] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.014883] Call Trace: [ 43.015216] [ 43.015499] dump_stack_lvl+0x91/0xf0 [ 43.015988] print_report+0xcc/0x620 [ 43.016491] ? __virt_addr_valid+0x102/0x340 [ 43.017047] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.017653] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.018278] kasan_report+0xbe/0xf0 [ 43.018753] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.019387] vma_interval_tree_remove+0xc75/0xec0 [ 43.019987] vma_prepare+0xc54/0x11a0 [ 43.020486] __split_vma+0x5af/0x950 [ 43.020961] ? __pfx___split_vma+0x10/0x10 [ 43.021494] ? find_held_lock+0x2c/0x110 [ 43.022019] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.022589] ? lock_is_held_type+0x9f/0x120 [ 43.023127] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.023741] ? mtree_range_walk+0x632/0x900 [ 43.024323] ? mas_walk+0x5c7/0x7c0 [ 43.024799] do_vmi_munmap+0x1f1/0x2b0 [ 43.025294] mmap_region+0x1f9/0x2660 [ 43.025785] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.026295] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.027009] ? __pfx_lock_acquire+0x10/0x10 [ 43.027538] ? __pfx_mmap_region+0x10/0x10 [ 43.028070] ? security_mmap_addr+0x7d/0xa0 [ 43.028606] ? get_unmapped_area+0x1f5/0x3f0 [ 43.029162] do_mmap+0x854/0xf00 [ 43.029601] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.030099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.030668] ksys_mmap_pgoff+0x3af/0x500 [ 43.031175] do_syscall_64+0x3f/0x90 [ 43.031665] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.032327] RIP: 0033:0x7f55ba162d82 [ 43.032796] 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 [ 43.034941] RSP: 002b:00007fffac6e8f68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.035856] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f55ba162d82 [ 43.036721] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f55b959c000 [ 43.037585] RBP: 00007f55b959c000 R08: 0000000000000009 R09: 0000000000001000 [ 43.038435] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556687932f70 [ 43.039293] R13: 00007fffac6e8f80 R14: 00007fffac6e8fb0 R15: 00007fffac6e9310 [ 43.040153] [ 43.040452] [ 43.040675] Allocated by task 213: [ 43.041110] kasan_save_stack+0x22/0x50 [ 43.041612] kasan_set_track+0x25/0x30 [ 43.042110] __kasan_slab_alloc+0x59/0x70 [ 43.042637] kmem_cache_alloc+0x16b/0x370 [ 43.043161] vm_area_dup+0x20/0x160 [ 43.043617] __split_vma+0x170/0x950 [ 43.044097] split_vma+0xc6/0x110 [ 43.044565] mprotect_fixup+0x8d2/0xb30 [ 43.045089] do_mprotect_pkey+0x87e/0xd40 [ 43.045629] __x64_sys_mprotect+0x78/0xc0 [ 43.046178] do_syscall_64+0x3f/0x90 [ 43.046669] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.047336] [ 43.047557] Freed by task 213: [ 43.047967] kasan_save_stack+0x22/0x50 [ 43.048506] kasan_set_track+0x25/0x30 [ 43.049017] kasan_save_free_info+0x2b/0x50 [ 43.049571] __kasan_slab_free+0x10a/0x190 [ 43.050127] kmem_cache_free+0x10d/0x4d0 [ 43.050660] rcu_core+0x8c8/0x2860 [ 43.051120] __do_softirq+0x1b7/0x7d4 [ 43.051621] [ 43.051847] Last potentially related work creation: [ 43.052485] kasan_save_stack+0x22/0x50 [ 43.053011] __kasan_record_aux_stack+0x8e/0xa0 [ 43.053615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.054286] remove_vma+0x139/0x170 [ 43.054761] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.055398] do_vmi_munmap+0x1f1/0x2b0 [ 43.055905] __vm_munmap+0x138/0x3a0 [ 43.056396] __x64_sys_munmap+0x59/0x80 [ 43.056914] do_syscall_64+0x3f/0x90 [ 43.057410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.058076] [ 43.058296] The buggy address belongs to the object at ffff8880161532b8 [ 43.058296] which belongs to the cache vm_area_struct of size 168 [ 43.059830] The buggy address is located 88 bytes inside of [ 43.059830] freed 168-byte region [ffff8880161532b8, ffff888016153360) [ 43.061313] [ 43.061545] The buggy address belongs to the physical page: [ 43.062231] page:000000002a731680 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16153 [ 43.063376] memcg:ffff88800dacd201 [ 43.063817] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.064510] page_type: 0xffffffff() [ 43.064985] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 43.065944] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800dacd201 [ 43.066888] page dumped because: kasan: bad access detected [ 43.067577] [ 43.067802] Memory state around the buggy address: [ 43.068414] ffff888016153200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.069312] ffff888016153280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.070211] >ffff888016153300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.071094] ^ [ 43.071575] ffff888016153380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.072484] ffff888016153400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.073377] ================================================================== [ 43.074335] Disabling lock debugging due to kernel taint [ 44.924380] BUG: Bad rss-counter state mm:000000006d111184 type:MM_FILEPAGES val:33 [ 44.925130] BUG: Bad rss-counter state mm:000000006d111184 type:MM_ANONPAGES val:22 [ 45.465960] BUG: Bad rss-counter state mm:0000000069e467ac type:MM_FILEPAGES val:33 [ 45.467193] BUG: Bad rss-counter state mm:0000000069e467ac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51078' (ECDSA) to the list of known hosts. 2023/06/20 06:54:10 fuzzer started 2023/06/20 06:54:10 dialing manager at localhost:44161 2023/06/20 06:54:10 checking machine... 2023/06/20 06:54:10 checking revisions... [ 46.162595] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:54:10 testing simple program... [ 46.194349] cgroup: Unknown subsys name 'net' [ 46.230736] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:54:02 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=dffffc0000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff815a2954 RDI=ffff88801479fd28 RBP=ffff88801479fd28 RSP=ffff88801479fc60 R8 =0000000000000004 R9 =000000007fff0000 R10=000000007fff0000 R11=0000000000000000 R12=00000000000000ac R13=1ffff110028f3fa7 R14=ffff88801479fe30 R15=ffffc90000683048 RIP=ffffffff815a2975 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 00007f5c562e7900 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=00007f5c5570bc90 CR3=000000000c62e000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=dbc9fe132fc6675f00000000000ae988 XMM05=6d1f40d7c5176df600000000001351a8 XMM06=00c3ffa147b8d8570000000000133c28 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000008000 RBX=000055b383f15ed0 RCX=0000000000000010 RDX=00000000000001c0 RSI=000000000000000a RDI=000055b383f252e0 RBP=00007ffe91854830 RSP=00007ffe918547c8 R8 =000055b383f252f0 R9 =00007f01d5ce1be0 R10=0000000000000100 R11=0000000000000246 R12=00007f01d572f900 R13=00007ffe91854838 R14=00000000000001c0 R15=0000000000000000 RIP=00007f01d5c7e9bf RFL=00000202 [-------] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f01d572f900 00000000 00000000 GS =0000 0000000000000000 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=00007ffe9184f000 CR3=000000000e5ce000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=ff000000000000000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=20666f207473696c20646574696d696c XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00ffffffffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000