syzkaller login: [ 32.593530] BUG: Bad rss-counter state mm:000000002ebd9b77 type:MM_FILEPAGES val:33 [ 32.595082] BUG: Bad rss-counter state mm:000000002ebd9b77 type:MM_ANONPAGES val:22 [ 32.753947] ================================================================== [ 32.754861] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.755797] Read of size 8 at addr ffff888019e5ba50 by task sshd/221 [ 32.756564] [ 32.756782] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.757840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.758810] Call Trace: [ 32.759125] [ 32.759528] dump_stack_lvl+0x91/0xf0 [ 32.760115] print_report+0xcc/0x620 [ 32.760686] ? __virt_addr_valid+0x102/0x340 [ 32.761330] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.762077] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.762803] kasan_report+0xbe/0xf0 [ 32.763374] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.764149] vma_interval_tree_remove+0xc75/0xec0 [ 32.764890] vma_prepare+0xc54/0x11a0 [ 32.765467] __split_vma+0x5af/0x950 [ 32.766054] ? __pfx___split_vma+0x10/0x10 [ 32.766705] ? find_held_lock+0x2c/0x110 [ 32.767340] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.768036] ? lock_is_held_type+0x9f/0x120 [ 32.768695] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.769438] ? mtree_range_walk+0x632/0x900 [ 32.770142] ? mas_walk+0x5c7/0x7c0 [ 32.770653] do_vmi_munmap+0x1f1/0x2b0 [ 32.771150] mmap_region+0x1f9/0x2660 [ 32.771632] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.772146] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.772854] ? __pfx_lock_acquire+0x10/0x10 [ 32.773376] ? __pfx_mmap_region+0x10/0x10 [ 32.773910] ? security_mmap_addr+0x7d/0xa0 [ 32.774439] ? get_unmapped_area+0x1f5/0x3f0 [ 32.774988] do_mmap+0x854/0xf00 [ 32.775431] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.775932] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.776493] ksys_mmap_pgoff+0x3af/0x500 [ 32.776994] do_syscall_64+0x3f/0x90 [ 32.777468] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.778116] RIP: 0033:0x7fd0ab540d82 [ 32.778569] 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 [ 32.780691] RSP: 002b:00007ffebecee628 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.781588] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd0ab540d82 [ 32.782455] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd0aa97a000 [ 32.783308] RBP: 00007fd0aa97a000 R08: 0000000000000009 R09: 0000000000001000 [ 32.784150] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e3da746ec0 [ 32.785000] R13: 00007ffebecee640 R14: 00007ffebecee670 R15: 00007ffebecee9d0 [ 32.785851] [ 32.786145] [ 32.786360] Allocated by task 214: [ 32.786789] kasan_save_stack+0x22/0x50 [ 32.787296] kasan_set_track+0x25/0x30 [ 32.787790] __kasan_slab_alloc+0x59/0x70 [ 32.788309] kmem_cache_alloc+0x16b/0x370 [ 32.788825] vm_area_dup+0x20/0x160 [ 32.789279] __split_vma+0x170/0x950 [ 32.789752] split_vma+0xc6/0x110 [ 32.790190] mprotect_fixup+0x8d2/0xb30 [ 32.790697] do_mprotect_pkey+0x87e/0xd40 [ 32.791214] __x64_sys_mprotect+0x78/0xc0 [ 32.791736] do_syscall_64+0x3f/0x90 [ 32.792205] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.792843] [ 32.793057] Freed by task 211: [ 32.793452] kasan_save_stack+0x22/0x50 [ 32.793976] kasan_set_track+0x25/0x30 [ 32.794477] kasan_save_free_info+0x2b/0x50 [ 32.795002] __kasan_slab_free+0x10a/0x190 [ 32.795532] kmem_cache_free+0x10d/0x4d0 [ 32.796032] rcu_core+0x8c8/0x2860 [ 32.796477] __do_softirq+0x1b7/0x7d4 [ 32.796955] [ 32.797169] Last potentially related work creation: [ 32.797759] kasan_save_stack+0x22/0x50 [ 32.798263] __kasan_record_aux_stack+0x8e/0xa0 [ 32.798917] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.799559] remove_vma+0x139/0x170 [ 32.800010] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.800565] do_vmi_munmap+0x1f1/0x2b0 [ 32.801047] __vm_munmap+0x138/0x3a0 [ 32.801511] __x64_sys_munmap+0x59/0x80 [ 32.802026] do_syscall_64+0x3f/0x90 [ 32.802502] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.803136] [ 32.803350] The buggy address belongs to the object at ffff888019e5b9f8 [ 32.803350] which belongs to the cache vm_area_struct of size 168 [ 32.804811] The buggy address is located 88 bytes inside of [ 32.804811] freed 168-byte region [ffff888019e5b9f8, ffff888019e5baa0) [ 32.806210] [ 32.806426] The buggy address belongs to the physical page: [ 32.807082] page:00000000674f6a96 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e5b [ 32.808168] memcg:ffff8880182dac01 [ 32.808594] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.809241] page_type: 0xffffffff() [ 32.809706] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.810626] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880182dac01 [ 32.811537] page dumped because: kasan: bad access detected [ 32.812195] [ 32.812410] Memory state around the buggy address: [ 32.812991] ffff888019e5b900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.813852] ffff888019e5b980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.814711] >ffff888019e5ba00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.815558] ^ [ 32.816258] ffff888019e5ba80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.817104] ffff888019e5bb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.817967] ================================================================== [ 32.819075] Disabling lock debugging due to kernel taint [ 34.572967] BUG: Bad rss-counter state mm:00000000e890f5ab type:MM_FILEPAGES val:33 [ 34.574247] BUG: Bad rss-counter state mm:00000000e890f5ab type:MM_ANONPAGES val:22 [ 34.995086] BUG: Bad rss-counter state mm:000000001e3ab459 type:MM_FILEPAGES val:33 [ 34.996277] BUG: Bad rss-counter state mm:000000001e3ab459 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:61964' (ECDSA) to the list of known hosts. 2023/06/19 20:07:30 fuzzer started 2023/06/19 20:07:31 dialing manager at localhost:44161 2023/06/19 20:07:31 checking machine... 2023/06/19 20:07:31 checking revisions... [ 35.684646] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:07:31 testing simple program... [ 35.729399] cgroup: Unknown subsys name 'net' [ 35.777035] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:07:29 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff888009690000 RCX=0000000000000000 RDX=ffff88800c551b40 RSI=ffffffff83647f96 RDI=ffff888009690000 RBP=0000000000000000 RSP=ffff888016f3fd20 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=ffff888009690000 R13=0000000000000000 R14=0000000000000001 R15=0000000000000024 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 00007f32dfb72900 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=00007f32e0127650 CR3=0000000019daa000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007ffc29bb98c8 CR3=0000000009a68000 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=2030333a37303a3032203931206e754a XMM01=657463656e6e6f63736944203a5d3033 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3033325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a37303a3032203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000