syzkaller login: [ 29.647105] BUG: Bad rss-counter state mm:00000000648785fc type:MM_FILEPAGES val:33 [ 29.648573] BUG: Bad rss-counter state mm:00000000648785fc type:MM_ANONPAGES val:22 [ 29.796496] ================================================================== [ 29.797563] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.798666] Read of size 8 at addr ffff88800ba09d08 by task sshd/219 [ 29.799702] [ 29.799981] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.800947] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.802055] Call Trace: [ 29.802411] [ 29.802726] dump_stack_lvl+0x91/0xf0 [ 29.803307] print_report+0xcc/0x620 [ 29.803845] ? __virt_addr_valid+0x102/0x340 [ 29.804464] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.805159] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.805850] kasan_report+0xbe/0xf0 [ 29.806379] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.807094] vma_interval_tree_remove+0xc75/0xec0 [ 29.807771] vma_prepare+0xc54/0x11a0 [ 29.808300] __split_vma+0x5af/0x950 [ 29.808828] ? __pfx___split_vma+0x10/0x10 [ 29.809424] ? find_held_lock+0x2c/0x110 [ 29.810008] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.810646] ? lock_is_held_type+0x9f/0x120 [ 29.811263] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.811942] ? mtree_range_walk+0x632/0x900 [ 29.812559] ? mas_walk+0x5c7/0x7c0 [ 29.813089] do_vmi_munmap+0x1f1/0x2b0 [ 29.813638] mmap_region+0x1f9/0x2660 [ 29.814178] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.814750] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.815576] ? __pfx_lock_acquire+0x10/0x10 [ 29.816170] ? __pfx_mmap_region+0x10/0x10 [ 29.816761] ? security_mmap_addr+0x7d/0xa0 [ 29.817356] ? get_unmapped_area+0x1f5/0x3f0 [ 29.817969] do_mmap+0x854/0xf00 [ 29.818456] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.819026] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.819650] ksys_mmap_pgoff+0x3af/0x500 [ 29.820213] do_syscall_64+0x3f/0x90 [ 29.820748] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.821468] RIP: 0033:0x7fcc9c493d82 [ 29.821978] 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 [ 29.824369] RSP: 002b:00007fff5d3af2b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.825374] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc9c493d82 [ 29.826319] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc9b8cd000 [ 29.827285] RBP: 00007fcc9b8cd000 R08: 0000000000000009 R09: 0000000000001000 [ 29.828228] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559cfe510ec0 [ 29.829170] R13: 00007fff5d3af2d0 R14: 00007fff5d3af300 R15: 00007fff5d3af660 [ 29.830124] [ 29.830450] [ 29.830689] Allocated by task 212: [ 29.831174] kasan_save_stack+0x22/0x50 [ 29.831741] kasan_set_track+0x25/0x30 [ 29.832293] __kasan_slab_alloc+0x59/0x70 [ 29.832881] kmem_cache_alloc+0x16b/0x370 [ 29.833460] vm_area_dup+0x20/0x160 [ 29.833958] __split_vma+0x170/0x950 [ 29.834512] split_vma+0xc6/0x110 [ 29.835037] mprotect_fixup+0x8d2/0xb30 [ 29.835574] do_mprotect_pkey+0x87e/0xd40 [ 29.836152] __x64_sys_mprotect+0x78/0xc0 [ 29.836725] do_syscall_64+0x3f/0x90 [ 29.837256] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.837977] [ 29.838215] Freed by task 202: [ 29.838655] kasan_save_stack+0x22/0x50 [ 29.839228] kasan_set_track+0x25/0x30 [ 29.839783] kasan_save_free_info+0x2b/0x50 [ 29.840428] __kasan_slab_free+0x10a/0x190 [ 29.841032] kmem_cache_free+0x10d/0x4d0 [ 29.841602] rcu_core+0x8c8/0x2860 [ 29.842099] __do_softirq+0x1b7/0x7d4 [ 29.842637] [ 29.842897] Last potentially related work creation: [ 29.843547] kasan_save_stack+0x22/0x50 [ 29.844107] __kasan_record_aux_stack+0x8e/0xa0 [ 29.844749] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.845459] remove_vma+0x139/0x170 [ 29.845965] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.846587] do_vmi_munmap+0x1f1/0x2b0 [ 29.847144] __vm_munmap+0x138/0x3a0 [ 29.847666] __x64_sys_munmap+0x59/0x80 [ 29.848220] do_syscall_64+0x3f/0x90 [ 29.848752] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.849473] [ 29.849711] The buggy address belongs to the object at ffff88800ba09cb0 [ 29.849711] which belongs to the cache vm_area_struct of size 168 [ 29.851363] The buggy address is located 88 bytes inside of [ 29.851363] freed 168-byte region [ffff88800ba09cb0, ffff88800ba09d58) [ 29.852942] [ 29.853182] The buggy address belongs to the physical page: [ 29.853916] page:00000000637e2fd4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xba09 [ 29.855148] memcg:ffff88800d546901 [ 29.855618] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.856333] page_type: 0xffffffff() [ 29.856829] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.857847] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d546901 [ 29.858864] page dumped because: kasan: bad access detected [ 29.859596] [ 29.859833] Memory state around the buggy address: [ 29.860474] ffff88800ba09c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 29.861420] ffff88800ba09c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 29.862380] >ffff88800ba09d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 29.863340] ^ [ 29.863828] ffff88800ba09d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 29.864787] ffff88800ba09e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 29.865739] ================================================================== [ 29.866879] Disabling lock debugging due to kernel taint [ 32.275077] BUG: Bad rss-counter state mm:000000000a71f262 type:MM_FILEPAGES val:33 [ 32.276289] BUG: Bad rss-counter state mm:000000000a71f262 type:MM_ANONPAGES val:22 [ 32.643446] BUG: Bad rss-counter state mm:00000000bfd9da50 type:MM_FILEPAGES val:33 [ 32.644475] BUG: Bad rss-counter state mm:00000000bfd9da50 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:21770' (ECDSA) to the list of known hosts. 2023/06/20 14:36:52 fuzzer started 2023/06/20 14:36:53 dialing manager at localhost:36067 2023/06/20 14:36:53 checking machine... 2023/06/20 14:36:53 checking revisions... [ 33.359581] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:36:53 testing simple program... [ 33.411388] cgroup: Unknown subsys name 'net' [ 33.460140] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:36:52 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110011b3f71 RCX=ffffffff812d8f13 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000000 RSP=ffff888008d9fb70 R8 =0000000000000000 R9 =0000000000000000 R10=ffff88806ce361e8 R11=0000000000000128 R12=0000000000000002 R13=0000000000000000 R14=ffffffff8560b640 R15=0000000000000000 RIP=ffffffff8180fea8 RFL=00000056 [---ZAP-] 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 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=00007ff4de83a618 CR3=000000000e4f4000 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=36333a3431203032206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343238 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888015812000 RCX=0000000080000000 RDX=ffff8880094cd1c0 RSI=ffffffff8386f904 RDI=0000000000000000 RBP=ffff88800d967d90 RSP=ffff88800d967c90 R8 =0000000000000001 R9 =fffffbfff0b749a0 R10=ffffffff85ba4d07 R11=00000000000b6a61 R12=ffff88801581250c R13=0000000000000000 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0871 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 00007ff4de283900 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=00007ffe6d070000 CR3=000000001686c000 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