syzkaller login: [ 31.119675] BUG: Bad rss-counter state mm:000000001821b22b type:MM_FILEPAGES val:33 [ 31.120455] BUG: Bad rss-counter state mm:000000001821b22b type:MM_ANONPAGES val:22 [ 31.257632] ================================================================== [ 31.258534] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.259452] Read of size 8 at addr ffff88800fdddc20 by task sshd/219 [ 31.260360] [ 31.260576] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.261428] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.262405] Call Trace: [ 31.262729] [ 31.263004] dump_stack_lvl+0x91/0xf0 [ 31.263482] print_report+0xcc/0x620 [ 31.263966] ? __virt_addr_valid+0x102/0x340 [ 31.264519] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265141] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.265737] kasan_report+0xbe/0xf0 [ 31.266202] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266831] vma_interval_tree_remove+0xc75/0xec0 [ 31.267427] vma_prepare+0xc54/0x11a0 [ 31.267932] __split_vma+0x5af/0x950 [ 31.268403] ? __pfx___split_vma+0x10/0x10 [ 31.268929] ? find_held_lock+0x2c/0x110 [ 31.269443] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270018] ? lock_is_held_type+0x9f/0x120 [ 31.270555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.271151] ? mtree_range_walk+0x632/0x900 [ 31.271694] ? mas_walk+0x5c7/0x7c0 [ 31.272198] do_vmi_munmap+0x1f1/0x2b0 [ 31.272683] mmap_region+0x1f9/0x2660 [ 31.273156] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.273694] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.274398] ? __pfx_lock_acquire+0x10/0x10 [ 31.274917] ? __pfx_mmap_region+0x10/0x10 [ 31.275436] ? security_mmap_addr+0x7d/0xa0 [ 31.275964] ? get_unmapped_area+0x1f5/0x3f0 [ 31.276397] do_mmap+0x854/0xf00 [ 31.276740] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.277127] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.277562] ksys_mmap_pgoff+0x3af/0x500 [ 31.277961] do_syscall_64+0x3f/0x90 [ 31.278338] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.278838] RIP: 0033:0x7f925db48d82 [ 31.279195] 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 [ 31.280856] RSP: 002b:00007ffcbd21fae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.281559] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f925db48d82 [ 31.282222] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f925cf82000 [ 31.282884] RBP: 00007f925cf82000 R08: 0000000000000009 R09: 0000000000001000 [ 31.283540] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557e250cbb20 [ 31.284208] R13: 00007ffcbd21fb00 R14: 00007ffcbd21fb30 R15: 00007ffcbd21fe90 [ 31.284868] [ 31.285095] [ 31.285261] Allocated by task 212: [ 31.285592] kasan_save_stack+0x22/0x50 [ 31.285984] kasan_set_track+0x25/0x30 [ 31.286366] __kasan_slab_alloc+0x59/0x70 [ 31.286772] kmem_cache_alloc+0x16b/0x370 [ 31.287170] vm_area_dup+0x20/0x160 [ 31.287522] __split_vma+0x170/0x950 [ 31.287890] split_vma+0xc6/0x110 [ 31.288233] mprotect_fixup+0x8d2/0xb30 [ 31.288622] do_mprotect_pkey+0x87e/0xd40 [ 31.289020] __x64_sys_mprotect+0x78/0xc0 [ 31.289423] do_syscall_64+0x3f/0x90 [ 31.289789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.290285] [ 31.290451] Freed by task 212: [ 31.290753] kasan_save_stack+0x22/0x50 [ 31.291146] kasan_set_track+0x25/0x30 [ 31.291528] kasan_save_free_info+0x2b/0x50 [ 31.291959] __kasan_slab_free+0x10a/0x190 [ 31.292373] kmem_cache_free+0x10d/0x4d0 [ 31.292768] rcu_core+0x8c8/0x2860 [ 31.293111] __do_softirq+0x1b7/0x7d4 [ 31.293477] [ 31.293643] Last potentially related work creation: [ 31.294098] kasan_save_stack+0x22/0x50 [ 31.294486] __kasan_record_aux_stack+0x8e/0xa0 [ 31.294935] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.295428] remove_vma+0x139/0x170 [ 31.295774] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.296217] do_vmi_munmap+0x1f1/0x2b0 [ 31.296592] __vm_munmap+0x138/0x3a0 [ 31.296951] __x64_sys_munmap+0x59/0x80 [ 31.297333] do_syscall_64+0x3f/0x90 [ 31.297696] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.298193] [ 31.298361] The buggy address belongs to the object at ffff88800fdddbc8 [ 31.298361] which belongs to the cache vm_area_struct of size 168 [ 31.299503] The buggy address is located 88 bytes inside of [ 31.299503] freed 168-byte region [ffff88800fdddbc8, ffff88800fdddc70) [ 31.300612] [ 31.300780] The buggy address belongs to the physical page: [ 31.301289] page:00000000999fdd57 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfddd [ 31.302134] memcg:ffff88800e8c4201 [ 31.302467] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.302968] page_type: 0xffffffff() [ 31.303316] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.304034] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8c4201 [ 31.304731] page dumped because: kasan: bad access detected [ 31.305243] [ 31.305408] Memory state around the buggy address: [ 31.305857] ffff88800fdddb00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.306522] ffff88800fdddb80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 31.307183] >ffff88800fdddc00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 31.307851] ^ [ 31.308261] ffff88800fdddc80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 31.308931] ffff88800fdddd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.309605] ================================================================== [ 31.310430] Disabling lock debugging due to kernel taint [ 33.341868] BUG: Bad rss-counter state mm:000000001e215dc6 type:MM_FILEPAGES val:33 [ 33.343033] BUG: Bad rss-counter state mm:000000001e215dc6 type:MM_ANONPAGES val:22 [ 33.735850] BUG: Bad rss-counter state mm:00000000452d2cb9 type:MM_FILEPAGES val:33 [ 33.737305] BUG: Bad rss-counter state mm:00000000452d2cb9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26185' (ECDSA) to the list of known hosts. 2023/06/19 12:10:48 fuzzer started 2023/06/19 12:10:49 dialing manager at localhost:44161 2023/06/19 12:10:49 checking machine... 2023/06/19 12:10:49 checking revisions... [ 34.478909] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:10:49 testing simple program... [ 34.536717] cgroup: Unknown subsys name 'net' [ 34.590314] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:10:48 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=ffff888008c58000 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=00007f9ecf6b26c0 CR3=000000000c7ea000 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=bf09a6341562ab84ba4e9203a2897425 XMM02=ec2efd57dc4c00df000000000011cc60 XMM03=93809a7f012c53dd000000000011cd30 XMM04=73163451c89daa6a00000000000ae988 XMM05=dfcdbad4f1609c370000000000133d18 XMM06=e8934c0e76c1bf890000000000132b80 XMM07=e042d86d42eb936e0000000000124410 XMM08=93809a7f012c53dd000000000011cd30 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000001 RCX=ffffffff864b0246 RDX=1ffff110031f3f54 RSI=1ffff110031f3f53 RDI=1ffff110031f3f53 RBP=ffff888018f9fa98 RSP=ffff888018f9f9d0 R8 =ffffffff864b024a R9 =ffff888018f9fa80 R10=0000000000038001 R11=00000000000b4fb9 R12=ffff888018f9faa0 R13=ffff888018f9fa88 R14=ffff888018f9ff58 R15=ffff888018f9fa40 RIP=ffffffff811310d4 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 00007f13bc6cc900 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=00007ffceefa9000 CR3=000000000dd92000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000