syzkaller login: [ 68.837338] BUG: Bad rss-counter state mm:00000000ced69efd type:MM_FILEPAGES val:33 [ 68.838368] BUG: Bad rss-counter state mm:00000000ced69efd type:MM_ANONPAGES val:22 [ 69.024360] ================================================================== [ 69.025312] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.026280] Read of size 8 at addr ffff888018067d08 by task sshd/227 [ 69.027076] [ 69.027297] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.028201] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.029202] Call Trace: [ 69.029539] [ 69.029849] dump_stack_lvl+0x91/0xf0 [ 69.030353] print_report+0xcc/0x620 [ 69.030839] ? __virt_addr_valid+0x102/0x340 [ 69.031397] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.032021] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.032648] kasan_report+0xbe/0xf0 [ 69.033127] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.033767] vma_interval_tree_remove+0xc75/0xec0 [ 69.034372] vma_prepare+0xc54/0x11a0 [ 69.034862] __split_vma+0x5af/0x950 [ 69.035339] ? __pfx___split_vma+0x10/0x10 [ 69.035869] ? find_held_lock+0x2c/0x110 [ 69.036397] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.036967] ? lock_is_held_type+0x9f/0x120 [ 69.037509] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.038142] ? mtree_range_walk+0x632/0x900 [ 69.038707] ? mas_walk+0x5c7/0x7c0 [ 69.039190] do_vmi_munmap+0x1f1/0x2b0 [ 69.039684] mmap_region+0x1f9/0x2660 [ 69.040167] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.040686] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.041398] ? __pfx_lock_acquire+0x10/0x10 [ 69.041940] ? __pfx_mmap_region+0x10/0x10 [ 69.042485] ? security_mmap_addr+0x7d/0xa0 [ 69.043046] ? get_unmapped_area+0x1f5/0x3f0 [ 69.043596] do_mmap+0x854/0xf00 [ 69.044049] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.044559] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.045127] ksys_mmap_pgoff+0x3af/0x500 [ 69.045673] do_syscall_64+0x3f/0x90 [ 69.046175] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.046831] RIP: 0033:0x7f411a1a2d82 [ 69.047294] 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 [ 69.049511] RSP: 002b:00007ffdd80816c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.050446] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f411a1a2d82 [ 69.051302] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f41195dc000 [ 69.052164] RBP: 00007f41195dc000 R08: 0000000000000009 R09: 0000000000001000 [ 69.053020] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562ca15c2980 [ 69.053915] R13: 00007ffdd80816e0 R14: 00007ffdd8081710 R15: 00007ffdd8081a70 [ 69.054792] [ 69.055081] [ 69.055299] Allocated by task 220: [ 69.055733] kasan_save_stack+0x22/0x50 [ 69.056246] kasan_set_track+0x25/0x30 [ 69.056753] __kasan_slab_alloc+0x59/0x70 [ 69.057294] kmem_cache_alloc+0x16b/0x370 [ 69.057829] vm_area_dup+0x20/0x160 [ 69.058286] __split_vma+0x170/0x950 [ 69.058762] split_vma+0xc6/0x110 [ 69.059202] mprotect_fixup+0x8d2/0xb30 [ 69.059711] do_mprotect_pkey+0x87e/0xd40 [ 69.060239] __x64_sys_mprotect+0x78/0xc0 [ 69.060758] do_syscall_64+0x3f/0x90 [ 69.061243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.061919] [ 69.062139] Freed by task 220: [ 69.062550] kasan_save_stack+0x22/0x50 [ 69.063125] kasan_set_track+0x25/0x30 [ 69.063695] kasan_save_free_info+0x2b/0x50 [ 69.064307] __kasan_slab_free+0x10a/0x190 [ 69.064917] kmem_cache_free+0x10d/0x4d0 [ 69.065502] rcu_core+0x8c8/0x2860 [ 69.066035] __do_softirq+0x1b7/0x7d4 [ 69.066590] [ 69.066843] Last potentially related work creation: [ 69.067542] kasan_save_stack+0x22/0x50 [ 69.068131] __kasan_record_aux_stack+0x8e/0xa0 [ 69.068811] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.069573] remove_vma+0x139/0x170 [ 69.070118] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.070782] do_vmi_munmap+0x1f1/0x2b0 [ 69.071363] __vm_munmap+0x138/0x3a0 [ 69.071916] __x64_sys_munmap+0x59/0x80 [ 69.072505] do_syscall_64+0x3f/0x90 [ 69.073063] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.073833] [ 69.074086] The buggy address belongs to the object at ffff888018067cb0 [ 69.074086] which belongs to the cache vm_area_struct of size 168 [ 69.075811] The buggy address is located 88 bytes inside of [ 69.075811] freed 168-byte region [ffff888018067cb0, ffff888018067d58) [ 69.077469] [ 69.077739] The buggy address belongs to the physical page: [ 69.078520] page:000000006f6cd8a7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18067 [ 69.079819] memcg:ffff8880160e4b01 [ 69.080324] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.081086] page_type: 0xffffffff() [ 69.081625] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.082710] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880160e4b01 [ 69.083990] page dumped because: kasan: bad access detected [ 69.084712] [ 69.084949] Memory state around the buggy address: [ 69.085594] ffff888018067c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 69.086589] ffff888018067c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 69.087579] >ffff888018067d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 69.088545] ^ [ 69.089139] ffff888018067d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 69.090107] ffff888018067e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 69.091063] ================================================================== [ 69.092498] Disabling lock debugging due to kernel taint [ 71.337756] BUG: Bad rss-counter state mm:000000007d2ed845 type:MM_FILEPAGES val:33 [ 71.338904] BUG: Bad rss-counter state mm:000000007d2ed845 type:MM_ANONPAGES val:22 [ 71.718820] BUG: Bad rss-counter state mm:00000000326f7486 type:MM_FILEPAGES val:33 [ 71.719878] BUG: Bad rss-counter state mm:00000000326f7486 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2992' (ECDSA) to the list of known hosts. 2023/06/20 14:18:02 fuzzer started 2023/06/20 14:18:02 dialing manager at localhost:36067 2023/06/20 14:18:02 checking machine... 2023/06/20 14:18:02 checking revisions... [ 72.543114] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:18:03 testing simple program... [ 72.592209] cgroup: Unknown subsys name 'net' [ 72.629889] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:18:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007efd96cfeb50 CR3=000000000c9a8000 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=0ce5839d7fcba8ab4740d77ad7ce5757 XMM02=000000000011b3a0d59e07bde36eea69 XMM03=000000000011b4c8ec2efd57dc4c00df XMM04=d0c9f3ee474e658800000000000ae988 XMM05=3cccb70d158389f400000000001340d0 XMM06=1a58cb52dc18f6d70000000000132f30 XMM07=fb795ef6d65770560000000000122aa0 XMM08=2c67c8bc2e329bc3000000000011b4c8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff888015b37520 RCX=ffffffff860d8201 RDX=1ffff11002b66eb2 RSI=ffffffff8180c6a2 RDI=ffff888015b3752c RBP=ffff888015b37590 RSP=ffff888015b37438 R8 =ffffffff860d825a R9 =ffff888015b37498 R10=0000000000038001 R11=0000000000010b8d R12=ffff888015b37520 R13=0000000000000000 R14=ffff88800dc71b40 R15=0000000000082cc0 RIP=ffffffff813ad547 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 00007f6a5db76900 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=00007ffde6217000 CR3=000000000e2b0000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000