syzkaller login: [ 38.674689] BUG: Bad rss-counter state mm:000000006f3fe8c3 type:MM_FILEPAGES val:33 [ 38.675363] BUG: Bad rss-counter state mm:000000006f3fe8c3 type:MM_ANONPAGES val:22 [ 38.846559] ================================================================== [ 38.847472] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.848408] Read of size 8 at addr ffff88800f7d6b38 by task sshd/226 [ 38.849188] [ 38.849404] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.850367] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.851344] Call Trace: [ 38.851662] [ 38.852065] dump_stack_lvl+0x91/0xf0 [ 38.852687] print_report+0xcc/0x620 [ 38.853279] ? __virt_addr_valid+0x102/0x340 [ 38.853962] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.854715] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.855468] kasan_report+0xbe/0xf0 [ 38.856059] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.856832] vma_interval_tree_remove+0xc75/0xec0 [ 38.857564] vma_prepare+0xc54/0x11a0 [ 38.858155] __split_vma+0x5af/0x950 [ 38.858734] ? __pfx___split_vma+0x10/0x10 [ 38.859381] ? find_held_lock+0x2c/0x110 [ 38.860022] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.860731] ? lock_is_held_type+0x9f/0x120 [ 38.861399] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.862158] ? mtree_range_walk+0x632/0x900 [ 38.862844] ? mas_walk+0x5c7/0x7c0 [ 38.863429] do_vmi_munmap+0x1f1/0x2b0 [ 38.864027] mmap_region+0x1f9/0x2660 [ 38.864647] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.865173] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.865901] ? __pfx_lock_acquire+0x10/0x10 [ 38.866442] ? __pfx_mmap_region+0x10/0x10 [ 38.866973] ? security_mmap_addr+0x7d/0xa0 [ 38.867511] ? get_unmapped_area+0x1f5/0x3f0 [ 38.868060] do_mmap+0x854/0xf00 [ 38.868500] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.869004] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.869560] ksys_mmap_pgoff+0x3af/0x500 [ 38.870094] do_syscall_64+0x3f/0x90 [ 38.870576] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.871228] RIP: 0033:0x7f8ac732cd82 [ 38.871688] 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 [ 38.873837] RSP: 002b:00007ffc7164cef8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.874744] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8ac732cd82 [ 38.875624] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f8ac6766000 [ 38.876476] RBP: 00007f8ac6766000 R08: 0000000000000009 R09: 0000000000001000 [ 38.877364] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564584e49f70 [ 38.878218] R13: 00007ffc7164cf10 R14: 00007ffc7164cf40 R15: 00007ffc7164d2a0 [ 38.879086] [ 38.879376] [ 38.879595] Allocated by task 219: [ 38.880088] kasan_save_stack+0x22/0x50 [ 38.880617] kasan_set_track+0x25/0x30 [ 38.881115] __kasan_slab_alloc+0x59/0x70 [ 38.881638] kmem_cache_alloc+0x16b/0x370 [ 38.882157] vm_area_dup+0x20/0x160 [ 38.882613] __split_vma+0x170/0x950 [ 38.883088] split_vma+0xc6/0x110 [ 38.883531] mprotect_fixup+0x8d2/0xb30 [ 38.884036] do_mprotect_pkey+0x87e/0xd40 [ 38.884588] __x64_sys_mprotect+0x78/0xc0 [ 38.885110] do_syscall_64+0x3f/0x90 [ 38.885595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.886241] [ 38.886458] Freed by task 219: [ 38.886859] kasan_save_stack+0x22/0x50 [ 38.887362] kasan_set_track+0x25/0x30 [ 38.887859] kasan_save_free_info+0x2b/0x50 [ 38.888389] __kasan_slab_free+0x10a/0x190 [ 38.888937] kmem_cache_free+0x10d/0x4d0 [ 38.889472] rcu_core+0x8c8/0x2860 [ 38.889933] __do_softirq+0x1b7/0x7d4 [ 38.890433] [ 38.890650] Last potentially related work creation: [ 38.891239] kasan_save_stack+0x22/0x50 [ 38.891773] __kasan_record_aux_stack+0x8e/0xa0 [ 38.892354] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.893024] remove_vma+0x139/0x170 [ 38.893490] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.894054] do_vmi_munmap+0x1f1/0x2b0 [ 38.894542] __vm_munmap+0x138/0x3a0 [ 38.895010] __x64_sys_munmap+0x59/0x80 [ 38.895516] do_syscall_64+0x3f/0x90 [ 38.896000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.896682] [ 38.896929] The buggy address belongs to the object at ffff88800f7d6ae0 [ 38.896929] which belongs to the cache vm_area_struct of size 168 [ 38.898436] The buggy address is located 88 bytes inside of [ 38.898436] freed 168-byte region [ffff88800f7d6ae0, ffff88800f7d6b88) [ 38.899938] [ 38.900161] The buggy address belongs to the physical page: [ 38.900859] page:0000000070c54d9c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7d6 [ 38.901973] memcg:ffff8880102c3e01 [ 38.902418] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.903074] page_type: 0xffffffff() [ 38.903530] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.904519] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880102c3e01 [ 38.905468] page dumped because: kasan: bad access detected [ 38.906131] [ 38.906345] Memory state around the buggy address: [ 38.906930] ffff88800f7d6a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.907793] ffff88800f7d6a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 38.908689] >ffff88800f7d6b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.909568] ^ [ 38.910208] ffff88800f7d6b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 38.911095] ffff88800f7d6c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 38.911984] ================================================================== [ 38.913292] Disabling lock debugging due to kernel taint [ 40.792778] BUG: Bad rss-counter state mm:000000002b568100 type:MM_FILEPAGES val:33 [ 40.794091] BUG: Bad rss-counter state mm:000000002b568100 type:MM_ANONPAGES val:22 [ 41.321289] BUG: Bad rss-counter state mm:00000000e3aaad6a type:MM_FILEPAGES val:33 [ 41.322450] BUG: Bad rss-counter state mm:00000000e3aaad6a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:17038' (ECDSA) to the list of known hosts. 2023/06/20 11:33:16 fuzzer started 2023/06/20 11:33:16 dialing manager at localhost:36067 2023/06/20 11:33:16 checking machine... 2023/06/20 11:33:16 checking revisions... [ 42.066568] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:33:16 testing simple program... [ 42.123414] cgroup: Unknown subsys name 'net' [ 42.190539] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:33:16 Registers: info registers vcpu 0 RAX=000000000410f00c RBX=7fffffffffffffff RCX=0000000000000000 RDX=000000000000001c RSI=00007ffdde5f2040 RDI=0000000000000000 RBP=00007ffdde5f2010 RSP=00007ffdde5f1fe0 R8 =00005563d73f1345 R9 =00007ffdde5f6080 R10=00007ffdde5f6080 R11=000000000000dcac R12=00007ffdde5f2040 R13=000000000000074d R14=000000000000004f R15=00007ffdde5f22f0 RIP=00007ffdde5fa997 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fee413ee900 00000000 00000000 GS =0000 0000000000000000 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=00007fee408371a8 CR3=000000000cb00000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=fe97869ce1361cbd00000000000ae988 XMM05=6e3fc831ada1355600000000001346c8 XMM06=13e856d8d71426c800000000001334b8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888016bf7000 RCX=ffffed1001d92f52 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff84535ffc RBP=0000000000000000 RSP=ffff88800ec97b60 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=ffff888016bf71b8 R13=ffff8880167be780 R14=ffff88800ec97c30 R15=0000000000000024 RIP=ffffffff814c086b 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 00007fc4afb1c900 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=00007ffc929fa000 CR3=000000000e5b8000 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