syzkaller login: [ 39.988109] BUG: Bad rss-counter state mm:00000000a826f2a0 type:MM_FILEPAGES val:33 [ 39.989508] BUG: Bad rss-counter state mm:00000000a826f2a0 type:MM_ANONPAGES val:22 [ 40.030374] ================================================================== [ 40.031057] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.031788] Read of size 8 at addr ffff88800d93f880 by task sshd/219 [ 40.032382] [ 40.032547] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.033210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.033956] Call Trace: [ 40.034197] [ 40.034410] dump_stack_lvl+0x91/0xf0 [ 40.034767] print_report+0xcc/0x620 [ 40.035124] ? __virt_addr_valid+0x102/0x340 [ 40.035758] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.036222] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.036687] kasan_report+0xbe/0xf0 [ 40.037039] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.037512] vma_interval_tree_remove+0xc75/0xec0 [ 40.037979] vma_prepare+0xc54/0x11a0 [ 40.038336] __split_vma+0x5af/0x950 [ 40.038687] ? __pfx___split_vma+0x10/0x10 [ 40.039075] ? find_held_lock+0x2c/0x110 [ 40.039468] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.039888] ? lock_is_held_type+0x9f/0x120 [ 40.040286] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.040741] ? mtree_range_walk+0x632/0x900 [ 40.041144] ? mas_walk+0x5c7/0x7c0 [ 40.041497] do_vmi_munmap+0x1f1/0x2b0 [ 40.041856] mmap_region+0x1f9/0x2660 [ 40.042216] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.042600] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.043140] ? __pfx_lock_acquire+0x10/0x10 [ 40.043543] ? __pfx_mmap_region+0x10/0x10 [ 40.043935] ? security_mmap_addr+0x7d/0xa0 [ 40.044337] ? get_unmapped_area+0x1f5/0x3f0 [ 40.044748] do_mmap+0x854/0xf00 [ 40.045072] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.045440] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.045856] ksys_mmap_pgoff+0x3af/0x500 [ 40.046230] do_syscall_64+0x3f/0x90 [ 40.046589] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.047072] RIP: 0033:0x7ff31667fd82 [ 40.047430] 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 [ 40.049037] RSP: 002b:00007ffeaadbc298 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.049718] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff31667fd82 [ 40.050353] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff315ab9000 [ 40.050992] RBP: 00007ff315ab9000 R08: 0000000000000009 R09: 0000000000001000 [ 40.051577] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560a33e90ec0 [ 40.052078] R13: 00007ffeaadbc2b0 R14: 00007ffeaadbc2e0 R15: 00007ffeaadbc640 [ 40.052595] [ 40.052769] [ 40.052899] Allocated by task 212: [ 40.053153] kasan_save_stack+0x22/0x50 [ 40.053451] kasan_set_track+0x25/0x30 [ 40.053741] __kasan_slab_alloc+0x59/0x70 [ 40.054050] kmem_cache_alloc+0x16b/0x370 [ 40.054357] vm_area_dup+0x20/0x160 [ 40.054629] __split_vma+0x170/0x950 [ 40.054904] split_vma+0xc6/0x110 [ 40.055163] mprotect_fixup+0x8d2/0xb30 [ 40.055466] do_mprotect_pkey+0x87e/0xd40 [ 40.055778] __x64_sys_mprotect+0x78/0xc0 [ 40.056083] do_syscall_64+0x3f/0x90 [ 40.056366] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.056747] [ 40.056874] Freed by task 202: [ 40.057105] kasan_save_stack+0x22/0x50 [ 40.057405] kasan_set_track+0x25/0x30 [ 40.057700] kasan_save_free_info+0x2b/0x50 [ 40.058014] __kasan_slab_free+0x10a/0x190 [ 40.058329] kmem_cache_free+0x10d/0x4d0 [ 40.058628] rcu_core+0x8c8/0x2860 [ 40.058890] __do_softirq+0x1b7/0x7d4 [ 40.059179] [ 40.059307] Last potentially related work creation: [ 40.059673] kasan_save_stack+0x22/0x50 [ 40.059971] __kasan_record_aux_stack+0x8e/0xa0 [ 40.060309] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.060688] remove_vma+0x139/0x170 [ 40.060955] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.061281] do_vmi_munmap+0x1f1/0x2b0 [ 40.061566] __vm_munmap+0x138/0x3a0 [ 40.061839] __x64_sys_munmap+0x59/0x80 [ 40.062130] do_syscall_64+0x3f/0x90 [ 40.062413] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.062789] [ 40.062917] The buggy address belongs to the object at ffff88800d93f828 [ 40.062917] which belongs to the cache vm_area_struct of size 168 [ 40.063784] The buggy address is located 88 bytes inside of [ 40.063784] freed 168-byte region [ffff88800d93f828, ffff88800d93f8d0) [ 40.064608] [ 40.064738] The buggy address belongs to the physical page: [ 40.065129] page:000000002d4f5d0c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd93f [ 40.065762] memcg:ffff88800cb00901 [ 40.066014] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.066397] page_type: 0xffffffff() [ 40.066662] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 40.067202] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb00901 [ 40.067751] page dumped because: kasan: bad access detected [ 40.068138] [ 40.068269] Memory state around the buggy address: [ 40.068608] ffff88800d93f780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 40.069110] ffff88800d93f800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.069615] >ffff88800d93f880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.070109] ^ [ 40.070350] ffff88800d93f900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.070853] ffff88800d93f980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 40.071360] ================================================================== [ 40.071944] Disabling lock debugging due to kernel taint [ 42.108580] BUG: Bad rss-counter state mm:00000000d50ae730 type:MM_FILEPAGES val:33 [ 42.109793] BUG: Bad rss-counter state mm:00000000d50ae730 type:MM_ANONPAGES val:22 [ 42.520485] BUG: Bad rss-counter state mm:000000004e2da3c3 type:MM_FILEPAGES val:33 [ 42.521964] BUG: Bad rss-counter state mm:000000004e2da3c3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18542' (ECDSA) to the list of known hosts. 2023/06/19 16:36:22 fuzzer started 2023/06/19 16:36:22 dialing manager at localhost:44161 2023/06/19 16:36:22 checking machine... 2023/06/19 16:36:22 checking revisions... [ 43.264582] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:36:22 testing simple program... [ 43.314610] cgroup: Unknown subsys name 'net' [ 43.352629] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:36:12 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007ffc9ec7b918 CR3=0000000005482000 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=00007f71a4a865100000555a6c421790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000007 RBX=ffffffff85dfc4fc RCX=ffffffff81807f5a RDX=0000000000000000 RSI=ffffffff86136d7c RDI=ffffffff85dfc4f4 RBP=ffffffff85dfc4fc RSP=ffff88801471f6e8 R8 =ffffffff86136d7c R9 =ffff88801471f7e0 R10=0000000000038001 R11=0000000000020c48 R12=ffffffff85dfc4fc R13=ffffffff85dfc4f4 R14=ffffffff85dfc4f8 R15=dffffc0000000000 RIP=ffffffff8112fc8e 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 00007f37bffbf900 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=00007fbf9a5e3650 CR3=000000000ca26000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=ecc12f77a723bb6300000000000ae988 XMM05=ba33f84ecebc5f550000000000135618 XMM06=806171799158d9670000000000134408 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000