syzkaller login: [ 34.156987] BUG: Bad rss-counter state mm:000000009fcf2d57 type:MM_FILEPAGES val:33 [ 34.158565] BUG: Bad rss-counter state mm:000000009fcf2d57 type:MM_ANONPAGES val:22 [ 34.318966] ================================================================== [ 34.320047] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.321168] Read of size 8 at addr ffff8880098b66b0 by task sshd/221 [ 34.322334] [ 34.322628] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.323630] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.324799] Call Trace: [ 34.325327] [ 34.325815] dump_stack_lvl+0x91/0xf0 [ 34.326696] print_report+0xcc/0x620 [ 34.327468] ? __virt_addr_valid+0x102/0x340 [ 34.328274] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.329139] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.329761] kasan_report+0xbe/0xf0 [ 34.330229] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.330862] vma_interval_tree_remove+0xc75/0xec0 [ 34.331456] vma_prepare+0xc54/0x11a0 [ 34.331934] __split_vma+0x5af/0x950 [ 34.332390] ? __pfx___split_vma+0x10/0x10 [ 34.332907] ? find_held_lock+0x2c/0x110 [ 34.333419] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.333982] ? lock_is_held_type+0x9f/0x120 [ 34.334538] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.335144] ? mtree_range_walk+0x632/0x900 [ 34.335676] ? mas_walk+0x5c7/0x7c0 [ 34.336138] do_vmi_munmap+0x1f1/0x2b0 [ 34.336622] mmap_region+0x1f9/0x2660 [ 34.337092] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.337586] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.338291] ? __pfx_lock_acquire+0x10/0x10 [ 34.338842] ? __pfx_mmap_region+0x10/0x10 [ 34.339361] ? security_mmap_addr+0x7d/0xa0 [ 34.339893] ? get_unmapped_area+0x1f5/0x3f0 [ 34.340433] do_mmap+0x854/0xf00 [ 34.340873] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.341363] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.341922] ksys_mmap_pgoff+0x3af/0x500 [ 34.342426] do_syscall_64+0x3f/0x90 [ 34.342917] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.343542] RIP: 0033:0x7f6671612d82 [ 34.343996] 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 [ 34.346092] RSP: 002b:00007ffc684fc0c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.346998] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6671612d82 [ 34.347828] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6670a4c000 [ 34.348651] RBP: 00007f6670a4c000 R08: 0000000000000009 R09: 0000000000001000 [ 34.349485] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd0d9c0ec0 [ 34.350323] R13: 00007ffc684fc0e0 R14: 00007ffc684fc110 R15: 00007ffc684fc470 [ 34.351196] [ 34.351483] [ 34.351691] Allocated by task 214: [ 34.352109] kasan_save_stack+0x22/0x50 [ 34.352603] kasan_set_track+0x25/0x30 [ 34.353089] __kasan_slab_alloc+0x59/0x70 [ 34.353605] kmem_cache_alloc+0x16b/0x370 [ 34.354109] vm_area_dup+0x20/0x160 [ 34.354573] __split_vma+0x170/0x950 [ 34.355034] split_vma+0xc6/0x110 [ 34.355463] mprotect_fixup+0x8d2/0xb30 [ 34.355949] do_mprotect_pkey+0x87e/0xd40 [ 34.356464] __x64_sys_mprotect+0x78/0xc0 [ 34.356963] do_syscall_64+0x3f/0x90 [ 34.357422] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.358053] [ 34.358265] Freed by task 214: [ 34.358651] kasan_save_stack+0x22/0x50 [ 34.359148] kasan_set_track+0x25/0x30 [ 34.359627] kasan_save_free_info+0x2b/0x50 [ 34.360144] __kasan_slab_free+0x10a/0x190 [ 34.360667] kmem_cache_free+0x10d/0x4d0 [ 34.361165] rcu_core+0x8c8/0x2860 [ 34.361603] __do_softirq+0x1b7/0x7d4 [ 34.362066] [ 34.362278] Last potentially related work creation: [ 34.362884] kasan_save_stack+0x22/0x50 [ 34.363368] __kasan_record_aux_stack+0x8e/0xa0 [ 34.363924] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.364557] remove_vma+0x139/0x170 [ 34.365000] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.365552] do_vmi_munmap+0x1f1/0x2b0 [ 34.366028] __vm_munmap+0x138/0x3a0 [ 34.366507] __x64_sys_munmap+0x59/0x80 [ 34.367001] do_syscall_64+0x3f/0x90 [ 34.367455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.368074] [ 34.368285] The buggy address belongs to the object at ffff8880098b6658 [ 34.368285] which belongs to the cache vm_area_struct of size 168 [ 34.369734] The buggy address is located 88 bytes inside of [ 34.369734] freed 168-byte region [ffff8880098b6658, ffff8880098b6700) [ 34.371128] [ 34.371337] The buggy address belongs to the physical page: [ 34.371989] page:0000000032d67796 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x98b6 [ 34.373044] memcg:ffff88801038d301 [ 34.373457] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.374089] page_type: 0xffffffff() [ 34.374565] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.375480] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801038d301 [ 34.376374] page dumped because: kasan: bad access detected [ 34.377020] [ 34.377232] Memory state around the buggy address: [ 34.377804] ffff8880098b6580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.378663] ffff8880098b6600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 34.379497] >ffff8880098b6680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.380339] ^ [ 34.380916] ffff8880098b6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 34.381753] ffff8880098b6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 34.382609] ================================================================== [ 34.383819] Disabling lock debugging due to kernel taint [ 37.341376] BUG: Bad rss-counter state mm:00000000368ac8ab type:MM_FILEPAGES val:33 [ 37.342652] BUG: Bad rss-counter state mm:00000000368ac8ab type:MM_ANONPAGES val:22 [ 37.805750] BUG: Bad rss-counter state mm:0000000001fb2e4d type:MM_FILEPAGES val:33 [ 37.807038] BUG: Bad rss-counter state mm:0000000001fb2e4d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:29880' (ECDSA) to the list of known hosts. 2023/06/20 00:06:10 fuzzer started 2023/06/20 00:06:10 dialing manager at localhost:44161 2023/06/20 00:06:10 checking machine... 2023/06/20 00:06:10 checking revisions... [ 38.722579] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:06:11 testing simple program... [ 38.779980] cgroup: Unknown subsys name 'net' [ 38.833153] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:06:06 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=ffff888008c58000 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=00007f3785813d60 CR3=0000000017374000 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=2030313a36303a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039303a36303a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffff888016b2fca8 RCX=0000000000000000 RDX=ffff888010208000 RSI=ffffffff8449f886 RDI=0000000000000007 RBP=0000000000000001 RSP=ffff888016b2f8e8 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000001 R11=0000000000000000 R12=0000000000000000 R13=ffff888016b2fcb0 R14=0000000000000000 R15=ffff888016b2fce1 RIP=ffffffff814c081b 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 00007f31ecb21900 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=00007f31ecaf0008 CR3=0000000018c34000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000