syzkaller login: [ 38.778632] BUG: Bad rss-counter state mm:000000005871c1ee type:MM_FILEPAGES val:33 [ 38.779185] BUG: Bad rss-counter state mm:000000005871c1ee type:MM_ANONPAGES val:22 [ 38.892047] ================================================================== [ 38.892562] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.893081] Read of size 8 at addr ffff88801810c968 by task sshd/219 [ 38.893564] [ 38.893732] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.894376] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.895081] Call Trace: [ 38.895322] [ 38.895532] dump_stack_lvl+0x91/0xf0 [ 38.895901] print_report+0xcc/0x620 [ 38.896260] ? __virt_addr_valid+0x102/0x340 [ 38.896676] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897138] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.897763] kasan_report+0xbe/0xf0 [ 38.898119] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.898581] vma_interval_tree_remove+0xc75/0xec0 [ 38.899031] vma_prepare+0xc54/0x11a0 [ 38.899384] __split_vma+0x5af/0x950 [ 38.899741] ? __pfx___split_vma+0x10/0x10 [ 38.900144] ? find_held_lock+0x2c/0x110 [ 38.900542] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.900953] ? lock_is_held_type+0x9f/0x120 [ 38.901386] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.901836] ? mtree_range_walk+0x632/0x900 [ 38.902250] ? mas_walk+0x5c7/0x7c0 [ 38.902560] do_vmi_munmap+0x1f1/0x2b0 [ 38.902834] mmap_region+0x1f9/0x2660 [ 38.903094] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.903370] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.903753] ? __pfx_lock_acquire+0x10/0x10 [ 38.904038] ? __pfx_mmap_region+0x10/0x10 [ 38.904323] ? security_mmap_addr+0x7d/0xa0 [ 38.904616] ? get_unmapped_area+0x1f5/0x3f0 [ 38.904913] do_mmap+0x854/0xf00 [ 38.905155] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.905429] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.905729] ksys_mmap_pgoff+0x3af/0x500 [ 38.906003] do_syscall_64+0x3f/0x90 [ 38.906262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.906615] RIP: 0033:0x7fb863e9bd82 [ 38.906859] 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 [ 38.907996] RSP: 002b:00007fffcaa1e368 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.908483] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb863e9bd82 [ 38.908934] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb8632d5000 [ 38.909394] RBP: 00007fb8632d5000 R08: 0000000000000009 R09: 0000000000001000 [ 38.909849] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ff90242d90 [ 38.910306] R13: 00007fffcaa1e380 R14: 00007fffcaa1e3b0 R15: 00007fffcaa1e710 [ 38.910774] [ 38.910930] [ 38.911045] Allocated by task 212: [ 38.911274] kasan_save_stack+0x22/0x50 [ 38.911544] kasan_set_track+0x25/0x30 [ 38.911813] __kasan_slab_alloc+0x59/0x70 [ 38.912095] kmem_cache_alloc+0x16b/0x370 [ 38.912373] vm_area_dup+0x20/0x160 [ 38.912622] __split_vma+0x170/0x950 [ 38.912873] split_vma+0xc6/0x110 [ 38.913106] mprotect_fixup+0x8d2/0xb30 [ 38.913385] do_mprotect_pkey+0x87e/0xd40 [ 38.913669] __x64_sys_mprotect+0x78/0xc0 [ 38.913953] do_syscall_64+0x3f/0x90 [ 38.914208] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.914556] [ 38.914670] Freed by task 212: [ 38.914882] kasan_save_stack+0x22/0x50 [ 38.915152] kasan_set_track+0x25/0x30 [ 38.915417] kasan_save_free_info+0x2b/0x50 [ 38.915705] __kasan_slab_free+0x10a/0x190 [ 38.915994] kmem_cache_free+0x10d/0x4d0 [ 38.916267] rcu_core+0x8c8/0x2860 [ 38.916509] __do_softirq+0x1b7/0x7d4 [ 38.916770] [ 38.916886] Last potentially related work creation: [ 38.917213] kasan_save_stack+0x22/0x50 [ 38.917484] __kasan_record_aux_stack+0x8e/0xa0 [ 38.917791] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.918142] remove_vma+0x139/0x170 [ 38.918392] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.918690] do_vmi_munmap+0x1f1/0x2b0 [ 38.918955] __vm_munmap+0x138/0x3a0 [ 38.919204] __x64_sys_munmap+0x59/0x80 [ 38.919479] do_syscall_64+0x3f/0x90 [ 38.919733] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.920076] [ 38.920191] The buggy address belongs to the object at ffff88801810c910 [ 38.920191] which belongs to the cache vm_area_struct of size 168 [ 38.920987] The buggy address is located 88 bytes inside of [ 38.920987] freed 168-byte region [ffff88801810c910, ffff88801810c9b8) [ 38.921759] [ 38.921883] The buggy address belongs to the physical page: [ 38.922250] page:000000000862f7c9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1810c [ 38.922843] memcg:ffff8880182bbd01 [ 38.923074] flags: 0x100000000000200(slab|node=0|zone=1) [ 38.923429] page_type: 0xffffffff() [ 38.923670] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 38.924169] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182bbd01 [ 38.924663] page dumped because: kasan: bad access detected [ 38.925014] [ 38.925128] Memory state around the buggy address: [ 38.925446] ffff88801810c800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 38.925900] ffff88801810c880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 38.926368] >ffff88801810c900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.926830] ^ [ 38.927256] ffff88801810c980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.927731] ffff88801810ca00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.928191] ================================================================== [ 38.928709] Disabling lock debugging due to kernel taint [ 40.547484] BUG: Bad rss-counter state mm:0000000008ae61f8 type:MM_FILEPAGES val:33 [ 40.548653] BUG: Bad rss-counter state mm:0000000008ae61f8 type:MM_ANONPAGES val:22 [ 41.176696] BUG: Bad rss-counter state mm:000000003d10427f type:MM_FILEPAGES val:33 [ 41.177886] BUG: Bad rss-counter state mm:000000003d10427f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26931' (ECDSA) to the list of known hosts. 2023/06/20 17:19:47 fuzzer started 2023/06/20 17:19:48 dialing manager at localhost:36067 2023/06/20 17:19:48 checking machine... 2023/06/20 17:19:48 checking revisions... [ 41.858328] kmemleak: Automatic memory scanning thread ended 2023/06/20 17:19:48 testing simple program... [ 41.908872] cgroup: Unknown subsys name 'net' [ 41.955170] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:19:47 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff88800d99f8d8 RCX=0000000000000001 RDX=1ffff11001b33f1c RSI=ffff88800d99f8a8 RDI=ffff88800d99f8e0 RBP=ffff88800d99f8a8 RSP=ffff88800d99f7e0 R8 =0000000000000001 R9 =ffff88800d99f918 R10=0000000000038001 R11=0000000000006097 R12=0000000000000008 R13=ffff88800d99f920 R14=ffff88800d99f8a8 R15=ffff88800d99f8d8 RIP=ffffffff81130445 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 00007f48e8b20900 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=00007f48e7f46de0 CR3=000000000d7a4000 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=57bde251e5f35baa00000000000ae988 XMM05=8b5a04675d2ae2d70000000000133bd0 XMM06=f3829ad94b2e2eec0000000000132600 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000000 RCX=ffffffff814c856d RDX=ffff88800caa9b40 RSI=0000000000000100 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88806cf099f8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652c08 R15=ffff8880101c3008 RIP=ffffffff814c0272 RFL=00000206 [-----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 00007f1366344900 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=00007f13668fb618 CR3=000000001be1e000 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