syzkaller login: [ 29.785030] BUG: Bad rss-counter state mm:0000000074330b4e type:MM_FILEPAGES val:33 [ 29.786428] BUG: Bad rss-counter state mm:0000000074330b4e type:MM_ANONPAGES val:22 [ 29.972103] ================================================================== [ 29.973115] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.974221] Read of size 8 at addr ffff8880193be6b0 by task sshd/219 [ 29.975049] [ 29.975284] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.976216] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.977300] Call Trace: [ 29.977645] [ 29.977957] dump_stack_lvl+0x91/0xf0 [ 29.978493] print_report+0xcc/0x620 [ 29.979019] ? __virt_addr_valid+0x102/0x340 [ 29.979620] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.980294] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.980963] kasan_report+0xbe/0xf0 [ 29.981493] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.982212] vma_interval_tree_remove+0xc75/0xec0 [ 29.982892] vma_prepare+0xc54/0x11a0 [ 29.983433] __split_vma+0x5af/0x950 [ 29.983960] ? __pfx___split_vma+0x10/0x10 [ 29.984579] ? find_held_lock+0x2c/0x110 [ 29.985167] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.985800] ? lock_is_held_type+0x9f/0x120 [ 29.986412] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.987083] ? mtree_range_walk+0x632/0x900 [ 29.987708] ? mas_walk+0x5c7/0x7c0 [ 29.988243] do_vmi_munmap+0x1f1/0x2b0 [ 29.988815] mmap_region+0x1f9/0x2660 [ 29.989358] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.989931] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.990722] ? __pfx_lock_acquire+0x10/0x10 [ 29.991317] ? __pfx_mmap_region+0x10/0x10 [ 29.991905] ? security_mmap_addr+0x7d/0xa0 [ 29.992510] ? get_unmapped_area+0x1f5/0x3f0 [ 29.993128] do_mmap+0x854/0xf00 [ 29.993615] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.994166] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.994791] ksys_mmap_pgoff+0x3af/0x500 [ 29.995361] do_syscall_64+0x3f/0x90 [ 29.995892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.996636] RIP: 0033:0x7f391a8c4d82 [ 29.997147] 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 [ 29.999551] RSP: 002b:00007fff086690f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.000570] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f391a8c4d82 [ 30.001505] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3919cfe000 [ 30.002446] RBP: 00007f3919cfe000 R08: 0000000000000009 R09: 0000000000001000 [ 30.003392] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559ec4a83ec0 [ 30.004340] R13: 00007fff08669110 R14: 00007fff08669140 R15: 00007fff086694a0 [ 30.005338] [ 30.005665] [ 30.005900] Allocated by task 212: [ 30.006376] kasan_save_stack+0x22/0x50 [ 30.006927] kasan_set_track+0x25/0x30 [ 30.007472] __kasan_slab_alloc+0x59/0x70 [ 30.008057] kmem_cache_alloc+0x16b/0x370 [ 30.008647] vm_area_dup+0x20/0x160 [ 30.009152] __split_vma+0x170/0x950 [ 30.009688] split_vma+0xc6/0x110 [ 30.010181] mprotect_fixup+0x8d2/0xb30 [ 30.010765] do_mprotect_pkey+0x87e/0xd40 [ 30.011358] __x64_sys_mprotect+0x78/0xc0 [ 30.011945] do_syscall_64+0x3f/0x90 [ 30.012513] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.013255] [ 30.013505] Freed by task 212: [ 30.013947] kasan_save_stack+0x22/0x50 [ 30.014523] kasan_set_track+0x25/0x30 [ 30.015084] kasan_save_free_info+0x2b/0x50 [ 30.015700] __kasan_slab_free+0x10a/0x190 [ 30.016314] kmem_cache_free+0x10d/0x4d0 [ 30.016907] rcu_core+0x8c8/0x2860 [ 30.017415] __do_softirq+0x1b7/0x7d4 [ 30.017965] [ 30.018213] Last potentially related work creation: [ 30.018895] kasan_save_stack+0x22/0x50 [ 30.019476] __kasan_record_aux_stack+0x8e/0xa0 [ 30.020126] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.020874] remove_vma+0x139/0x170 [ 30.021392] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.022027] do_vmi_munmap+0x1f1/0x2b0 [ 30.022595] __vm_munmap+0x138/0x3a0 [ 30.023135] __x64_sys_munmap+0x59/0x80 [ 30.023705] do_syscall_64+0x3f/0x90 [ 30.024246] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.024997] [ 30.025241] The buggy address belongs to the object at ffff8880193be658 [ 30.025241] which belongs to the cache vm_area_struct of size 168 [ 30.026951] The buggy address is located 88 bytes inside of [ 30.026951] freed 168-byte region [ffff8880193be658, ffff8880193be700) [ 30.028596] [ 30.028837] The buggy address belongs to the physical page: [ 30.029561] page:000000009b5cb1a3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x193be [ 30.030780] memcg:ffff888015eb8c01 [ 30.031252] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.031970] page_type: 0xffffffff() [ 30.032504] raw: 0100000000000200 ffff8880087a0c80 ffffea00003adbc0 dead000000000004 [ 30.033514] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888015eb8c01 [ 30.034506] page dumped because: kasan: bad access detected [ 30.035231] [ 30.035466] Memory state around the buggy address: [ 30.036101] ffff8880193be580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.037042] ffff8880193be600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.037988] >ffff8880193be680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.038927] ^ [ 30.039570] ffff8880193be700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 30.040540] ffff8880193be780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.041504] ================================================================== [ 30.042789] Disabling lock debugging due to kernel taint [ 31.885682] BUG: Bad rss-counter state mm:00000000845b3215 type:MM_FILEPAGES val:33 [ 31.886935] BUG: Bad rss-counter state mm:00000000845b3215 type:MM_ANONPAGES val:22 [ 32.397896] BUG: Bad rss-counter state mm:000000002e116512 type:MM_FILEPAGES val:33 [ 32.399049] BUG: Bad rss-counter state mm:000000002e116512 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57560' (ECDSA) to the list of known hosts. 2023/06/20 19:50:19 fuzzer started 2023/06/20 19:50:19 dialing manager at localhost:36067 2023/06/20 19:50:19 checking machine... 2023/06/20 19:50:19 checking revisions... [ 33.039972] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:50:20 testing simple program... [ 33.095535] cgroup: Unknown subsys name 'net' [ 33.161566] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:50:19 Registers: info registers vcpu 0 RAX=ffff88801023d1c1 RBX=ffffffff85d3e48c RCX=ffffffff812be3aa RDX=1ffff11001e42545 RSI=0000000000000008 RDI=ffff88800f212a28 RBP=ffff88800f212a20 RSP=ffff88801809fe28 R8 =0000000000000000 R9 =ffffed1001e42545 R10=ffff88800f212a2f R11=0000000000000000 R12=1ffff11003013fc8 R13=ffff88800f212a88 R14=ffff88801023d1c0 R15=ffff88800f212a28 RIP=ffffffff812be3d2 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f08a51b1900 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=00007ffcc5ac26fc CR3=000000000c8a0000 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=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=983e08d34a799827aa6d6a9741b3fb60 XMM04=e5d8d57eefc92651bc410c2501cf5f60 XMM05=00000000000000000000000000000000 XMM06=983e087e4a792627aa410c2501b35f60 XMM07=672065736f6c635f6e6f69737365733a XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81288ac5 RBX=ffffffff813ad470 RCX=ffffffff864b3801 RDX=1ffff1100d9e135e RSI=ffffffff81288ac5 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =ffffffff864b381e R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b547f R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d951c0 R15=ffff88800d6927a0 RIP=ffffffff813ad470 RFL=00000286 [--S--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 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=00007fc5094b6140 CR3=000000001a8e6000 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=2039313a30353a3931203032206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a30353a3931203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000