syzkaller login: [ 28.705088] BUG: Bad rss-counter state mm:00000000414c32d2 type:MM_FILEPAGES val:33 [ 28.706154] BUG: Bad rss-counter state mm:00000000414c32d2 type:MM_ANONPAGES val:22 [ 28.874097] ================================================================== [ 28.875270] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.876316] Read of size 8 at addr ffff88800e1116b0 by task sshd/221 [ 28.877243] [ 28.877466] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 28.878314] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.879286] Call Trace: [ 28.879624] [ 28.879914] dump_stack_lvl+0x91/0xf0 [ 28.880408] print_report+0xcc/0x620 [ 28.880887] ? __virt_addr_valid+0x102/0x340 [ 28.881436] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882043] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.882650] kasan_report+0xbe/0xf0 [ 28.883132] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.883782] vma_interval_tree_remove+0xc75/0xec0 [ 28.884386] vma_prepare+0xc54/0x11a0 [ 28.884870] __split_vma+0x5af/0x950 [ 28.885382] ? __pfx___split_vma+0x10/0x10 [ 28.885947] ? find_held_lock+0x2c/0x110 [ 28.886512] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.887142] ? lock_is_held_type+0x9f/0x120 [ 28.887736] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.888398] ? mtree_range_walk+0x632/0x900 [ 28.888993] ? mas_walk+0x5c7/0x7c0 [ 28.889510] do_vmi_munmap+0x1f1/0x2b0 [ 28.890046] mmap_region+0x1f9/0x2660 [ 28.890566] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.891118] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.891904] ? __pfx_lock_acquire+0x10/0x10 [ 28.892479] ? __pfx_mmap_region+0x10/0x10 [ 28.893055] ? security_mmap_addr+0x7d/0xa0 [ 28.893627] ? get_unmapped_area+0x1f5/0x3f0 [ 28.894218] do_mmap+0x854/0xf00 [ 28.894693] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.895231] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.895854] ksys_mmap_pgoff+0x3af/0x500 [ 28.896407] do_syscall_64+0x3f/0x90 [ 28.896921] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.897610] RIP: 0033:0x7f81954d4d82 [ 28.898110] 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 [ 28.900452] RSP: 002b:00007fff95f18d18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.901432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f81954d4d82 [ 28.902351] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f819490e000 [ 28.903262] RBP: 00007f819490e000 R08: 0000000000000009 R09: 0000000000001000 [ 28.904200] R10: 0000000000000812 R11: 0000000000000206 R12: 000055815b09eec0 [ 28.905119] R13: 00007fff95f18d30 R14: 00007fff95f18d60 R15: 00007fff95f190c0 [ 28.906046] [ 28.906364] [ 28.906589] Allocated by task 214: [ 28.907051] kasan_save_stack+0x22/0x50 [ 28.907624] kasan_set_track+0x25/0x30 [ 28.908157] __kasan_slab_alloc+0x59/0x70 [ 28.908721] kmem_cache_alloc+0x16b/0x370 [ 28.909276] vm_area_dup+0x20/0x160 [ 28.909770] __split_vma+0x170/0x950 [ 28.910266] split_vma+0xc6/0x110 [ 28.910732] mprotect_fixup+0x8d2/0xb30 [ 28.911265] do_mprotect_pkey+0x87e/0xd40 [ 28.911854] __x64_sys_mprotect+0x78/0xc0 [ 28.912418] do_syscall_64+0x3f/0x90 [ 28.912933] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.913626] [ 28.913862] Freed by task 214: [ 28.914285] kasan_save_stack+0x22/0x50 [ 28.914825] kasan_set_track+0x25/0x30 [ 28.915373] kasan_save_free_info+0x2b/0x50 [ 28.915956] __kasan_slab_free+0x10a/0x190 [ 28.916536] kmem_cache_free+0x10d/0x4d0 [ 28.917093] rcu_core+0x8c8/0x2860 [ 28.917644] __do_softirq+0x1b7/0x7d4 [ 28.918171] [ 28.918408] Last potentially related work creation: [ 28.919058] kasan_save_stack+0x22/0x50 [ 28.919613] __kasan_record_aux_stack+0x8e/0xa0 [ 28.920248] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.920948] remove_vma+0x139/0x170 [ 28.921439] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.922054] do_vmi_munmap+0x1f1/0x2b0 [ 28.922568] __vm_munmap+0x138/0x3a0 [ 28.923082] __x64_sys_munmap+0x59/0x80 [ 28.923637] do_syscall_64+0x3f/0x90 [ 28.924147] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.924853] [ 28.925089] Second to last potentially related work creation: [ 28.925818] kasan_save_stack+0x22/0x50 [ 28.926360] __kasan_record_aux_stack+0x8e/0xa0 [ 28.926983] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.927704] remove_vma+0x139/0x170 [ 28.928186] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.928781] do_vmi_munmap+0x1f1/0x2b0 [ 28.929306] mmap_region+0x1f9/0x2660 [ 28.929826] do_mmap+0x854/0xf00 [ 28.930289] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.930821] ksys_mmap_pgoff+0x3af/0x500 [ 28.931376] do_syscall_64+0x3f/0x90 [ 28.931892] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.932600] [ 28.932838] The buggy address belongs to the object at ffff88800e111658 [ 28.932838] which belongs to the cache vm_area_struct of size 168 [ 28.934430] The buggy address is located 88 bytes inside of [ 28.934430] freed 168-byte region [ffff88800e111658, ffff88800e111700) [ 28.935981] [ 28.936222] The buggy address belongs to the physical page: [ 28.936948] page:00000000f3847cd9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe111 [ 28.938128] memcg:ffff88800e63fe01 [ 28.938587] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.939280] page_type: 0xffffffff() [ 28.939788] raw: 0100000000000200 ffff8880087a0c80 ffffea0000380800 dead000000000004 [ 28.940806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e63fe01 [ 28.941801] page dumped because: kasan: bad access detected [ 28.942524] [ 28.942760] Memory state around the buggy address: [ 28.943424] ffff88800e111580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.944355] ffff88800e111600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.945281] >ffff88800e111680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.946202] ^ [ 28.946829] ffff88800e111700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 28.947764] ffff88800e111780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 28.948704] ================================================================== [ 28.949699] Disabling lock debugging due to kernel taint [ 30.879161] BUG: Bad rss-counter state mm:00000000b6f4f4d5 type:MM_FILEPAGES val:33 [ 30.880577] BUG: Bad rss-counter state mm:00000000b6f4f4d5 type:MM_ANONPAGES val:22 [ 31.379431] BUG: Bad rss-counter state mm:00000000f35420d7 type:MM_FILEPAGES val:33 [ 31.380603] BUG: Bad rss-counter state mm:00000000f35420d7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39145' (ECDSA) to the list of known hosts. 2023/06/21 00:21:54 fuzzer started 2023/06/21 00:21:54 dialing manager at localhost:36067 2023/06/21 00:21:54 checking machine... 2023/06/21 00:21:54 checking revisions... [ 32.112452] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:21:54 testing simple program... [ 32.164742] cgroup: Unknown subsys name 'net' [ 32.215337] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:21:54 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00000000000000e6 RCX=0000000000000000 RDX=ffff888014609b40 RSI=ffffffff812110ad RDI=ffffffff85ba4d00 RBP=ffffffff85ba4d00 RSP=ffff8880102a7c58 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000001 R14=ffff8880102a7d28 R15=ffffffff85ba4d98 RIP=ffffffff812bec25 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 00007fbfc4299900 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=00007fbfc4850618 CR3=000000000eb02000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ffab8c01d20 CR3=000000000ef40000 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=35afc526ccaf1e965c4ee73553b3a897 XMM02=ec2efd57dc4c00df000000000011c310 XMM03=4b1e3f3bb18c56dc000000000011c3e0 XMM04=61314d84c82dd9c400000000000ae988 XMM05=e4cb8bb95a7664b60000000000133e38 XMM06=390255a1f065fe020000000000132ca0 XMM07=e042d86d42eb936e0000000000122f38 XMM08=4b1e3f3bb18c56dc000000000011c3e0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000