syzkaller login: [ 38.722100] BUG: Bad rss-counter state mm:00000000d515d4ed type:MM_FILEPAGES val:33 [ 38.723207] BUG: Bad rss-counter state mm:00000000d515d4ed type:MM_ANONPAGES val:22 [ 38.900060] ================================================================== [ 38.900988] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.901955] Read of size 8 at addr ffff88800f718140 by task sshd/219 [ 38.902756] [ 38.902984] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.903960] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.904963] Call Trace: [ 38.905296] [ 38.905607] dump_stack_lvl+0x91/0xf0 [ 38.906117] print_report+0xcc/0x620 [ 38.906633] ? __virt_addr_valid+0x102/0x340 [ 38.907209] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.907852] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.908491] kasan_report+0xbe/0xf0 [ 38.908984] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.909633] vma_interval_tree_remove+0xc75/0xec0 [ 38.910256] vma_prepare+0xc54/0x11a0 [ 38.910765] __split_vma+0x5af/0x950 [ 38.911254] ? __pfx___split_vma+0x10/0x10 [ 38.911803] ? find_held_lock+0x2c/0x110 [ 38.912347] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.912934] ? lock_is_held_type+0x9f/0x120 [ 38.913493] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.914118] ? mtree_range_walk+0x632/0x900 [ 38.914707] ? mas_walk+0x5c7/0x7c0 [ 38.915206] do_vmi_munmap+0x1f1/0x2b0 [ 38.915720] mmap_region+0x1f9/0x2660 [ 38.916223] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.916751] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.917501] ? __pfx_lock_acquire+0x10/0x10 [ 38.918076] ? __pfx_mmap_region+0x10/0x10 [ 38.918655] ? security_mmap_addr+0x7d/0xa0 [ 38.919221] ? get_unmapped_area+0x1f5/0x3f0 [ 38.919812] do_mmap+0x854/0xf00 [ 38.920280] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.920806] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.921405] ksys_mmap_pgoff+0x3af/0x500 [ 38.921946] do_syscall_64+0x3f/0x90 [ 38.922461] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.923148] RIP: 0033:0x7f9c11efcd82 [ 38.923633] 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 [ 38.925911] RSP: 002b:00007ffe592ee768 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.926896] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9c11efcd82 [ 38.927803] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9c11336000 [ 38.928714] RBP: 00007f9c11336000 R08: 0000000000000009 R09: 0000000000001000 [ 38.929617] R10: 0000000000000812 R11: 0000000000000206 R12: 00005634f6bc8ec0 [ 38.930526] R13: 00007ffe592ee780 R14: 00007ffe592ee7b0 R15: 00007ffe592eeb10 [ 38.931442] [ 38.931754] [ 38.931983] Allocated by task 212: [ 38.932438] kasan_save_stack+0x22/0x50 [ 38.932978] kasan_set_track+0x25/0x30 [ 38.933505] __kasan_slab_alloc+0x59/0x70 [ 38.934064] kmem_cache_alloc+0x16b/0x370 [ 38.934634] vm_area_dup+0x20/0x160 [ 38.935115] __split_vma+0x170/0x950 [ 38.935612] split_vma+0xc6/0x110 [ 38.936080] mprotect_fixup+0x8d2/0xb30 [ 38.936614] do_mprotect_pkey+0x87e/0xd40 [ 38.937170] __x64_sys_mprotect+0x78/0xc0 [ 38.937726] do_syscall_64+0x3f/0x90 [ 38.938232] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.938927] [ 38.939157] Freed by task 212: [ 38.939579] kasan_save_stack+0x22/0x50 [ 38.940119] kasan_set_track+0x25/0x30 [ 38.940648] kasan_save_free_info+0x2b/0x50 [ 38.941219] __kasan_slab_free+0x10a/0x190 [ 38.941788] kmem_cache_free+0x10d/0x4d0 [ 38.942350] rcu_core+0x8c8/0x2860 [ 38.942822] __do_softirq+0x1b7/0x7d4 [ 38.943332] [ 38.943563] Last potentially related work creation: [ 38.944185] kasan_save_stack+0x22/0x50 [ 38.944725] __kasan_record_aux_stack+0x8e/0xa0 [ 38.945336] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.946030] remove_vma+0x139/0x170 [ 38.946519] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.947114] do_vmi_munmap+0x1f1/0x2b0 [ 38.947643] __vm_munmap+0x138/0x3a0 [ 38.948142] __x64_sys_munmap+0x59/0x80 [ 38.948674] do_syscall_64+0x3f/0x90 [ 38.949182] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.949866] [ 38.950096] The buggy address belongs to the object at ffff88800f7180e8 [ 38.950096] which belongs to the cache vm_area_struct of size 168 [ 38.951682] The buggy address is located 88 bytes inside of [ 38.951682] freed 168-byte region [ffff88800f7180e8, ffff88800f718190) [ 38.953183] [ 38.953414] The buggy address belongs to the physical page: [ 38.954120] page:000000006400f6b7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf718 [ 38.955292] memcg:ffff88800d2e2101 [ 38.955744] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.956430] page_type: 0xffffffff() [ 38.956913] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.957896] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d2e2101 [ 38.958882] page dumped because: kasan: bad access detected [ 38.959590] [ 38.959821] Memory state around the buggy address: [ 38.960442] ffff88800f718000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.961358] ffff88800f718080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 38.962267] >ffff88800f718100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.963183] ^ [ 38.963864] ffff88800f718180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 38.964775] ffff88800f718200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 38.965682] ================================================================== [ 38.966752] Disabling lock debugging due to kernel taint [ 40.889186] BUG: Bad rss-counter state mm:0000000012b76ed5 type:MM_FILEPAGES val:33 [ 40.890385] BUG: Bad rss-counter state mm:0000000012b76ed5 type:MM_ANONPAGES val:22 [ 41.242385] BUG: Bad rss-counter state mm:000000007faebdb7 type:MM_FILEPAGES val:33 [ 41.243423] BUG: Bad rss-counter state mm:000000007faebdb7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45206' (ECDSA) to the list of known hosts. 2023/06/20 19:00:20 fuzzer started 2023/06/20 19:00:20 dialing manager at localhost:36067 2023/06/20 19:00:20 checking machine... 2023/06/20 19:00:20 checking revisions... [ 42.033159] kmemleak: Automatic memory scanning thread ended 2023/06/20 19:00:20 testing simple program... [ 42.079657] cgroup: Unknown subsys name 'net' [ 42.129442] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:00:20 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=00007fb8f8c94fe0 CR3=000000000c4d8000 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=6fca673ee34917938b4661cfc85a1cec XMM02=ec2efd57dc4c00df000000000011b850 XMM03=601e125e4420ea72000000000011b920 XMM04=b119a8c41ed9653800000000000ae988 XMM05=0693710e9200fd5e00000000001331d8 XMM06=806171799158d9670000000000131c58 XMM07=fb795ef6d65770560000000000122260 XMM08=2c67c8bc2e329bc3000000000011b8c0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff86138e91 RBX=0000000000000001 RCX=ffffffff86138e8c RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff88806cf09ad0 RSP=ffff88806cf09a08 R8 =ffffffff86138e90 R9 =ffff88806cf09ab8 R10=0000000000038001 R11=0000000000020d8f R12=ffff88806cf09ad8 R13=ffff88806cf09ac0 R14=ffff888010357628 R15=ffff88806cf09a78 RIP=ffffffff8113113c 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 00007f1999da6900 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=00007f199a35d618 CR3=000000000db7a000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000