syzkaller login: [ 32.264145] BUG: Bad rss-counter state mm:00000000dcf28e08 type:MM_FILEPAGES val:33 [ 32.265461] BUG: Bad rss-counter state mm:00000000dcf28e08 type:MM_ANONPAGES val:22 [ 32.448095] ================================================================== [ 32.449161] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.450163] Read of size 8 at addr ffff88800c4daa50 by task sshd/219 [ 32.451000] [ 32.451235] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.452141] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.453190] Call Trace: [ 32.453530] <TASK> [ 32.453829] dump_stack_lvl+0x91/0xf0 [ 32.454369] print_report+0xcc/0x620 [ 32.454876] ? __virt_addr_valid+0x102/0x340 [ 32.455455] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.456120] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.456768] kasan_report+0xbe/0xf0 [ 32.457272] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.457919] vma_interval_tree_remove+0xc75/0xec0 [ 32.458580] vma_prepare+0xc54/0x11a0 [ 32.459092] __split_vma+0x5af/0x950 [ 32.459588] ? __pfx___split_vma+0x10/0x10 [ 32.460151] ? find_held_lock+0x2c/0x110 [ 32.460711] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.461306] ? lock_is_held_type+0x9f/0x120 [ 32.461880] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.462528] ? mtree_range_walk+0x632/0x900 [ 32.463114] ? mas_walk+0x5c7/0x7c0 [ 32.463610] do_vmi_munmap+0x1f1/0x2b0 [ 32.464131] mmap_region+0x1f9/0x2660 [ 32.464648] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.465197] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.465955] ? __pfx_lock_acquire+0x10/0x10 [ 32.466536] ? __pfx_mmap_region+0x10/0x10 [ 32.467100] ? security_mmap_addr+0x7d/0xa0 [ 32.467664] ? get_unmapped_area+0x1f5/0x3f0 [ 32.468250] do_mmap+0x854/0xf00 [ 32.468709] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.469227] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.469807] ksys_mmap_pgoff+0x3af/0x500 [ 32.470358] do_syscall_64+0x3f/0x90 [ 32.470855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.471528] RIP: 0033:0x7f7d98306d82 [ 32.472006] 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 [ 32.474227] RSP: 002b:00007ffdcd72e9f8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.475178] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d98306d82 [ 32.476069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d97740000 [ 32.476949] RBP: 00007f7d97740000 R08: 0000000000000009 R09: 0000000000001000 [ 32.477841] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d51376cf60 [ 32.478746] R13: 00007ffdcd72ea10 R14: 00007ffdcd72ea40 R15: 00007ffdcd72eda0 [ 32.479645] </TASK> [ 32.479947] [ 32.480171] Allocated by task 212: [ 32.480615] kasan_save_stack+0x22/0x50 [ 32.481147] kasan_set_track+0x25/0x30 [ 32.481662] __kasan_slab_alloc+0x59/0x70 [ 32.482212] kmem_cache_alloc+0x16b/0x370 [ 32.482762] vm_area_dup+0x20/0x160 [ 32.483231] __split_vma+0x170/0x950 [ 32.483715] split_vma+0xc6/0x110 [ 32.484190] mprotect_fixup+0x8d2/0xb30 [ 32.484717] do_mprotect_pkey+0x87e/0xd40 [ 32.485257] __x64_sys_mprotect+0x78/0xc0 [ 32.485803] do_syscall_64+0x3f/0x90 [ 32.486293] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.486948] [ 32.487170] Freed by task 212: [ 32.487574] kasan_save_stack+0x22/0x50 [ 32.488086] kasan_set_track+0x25/0x30 [ 32.488593] kasan_save_free_info+0x2b/0x50 [ 32.489143] __kasan_slab_free+0x10a/0x190 [ 32.489685] kmem_cache_free+0x10d/0x4d0 [ 32.490211] rcu_core+0x8c8/0x2860 [ 32.490683] __do_softirq+0x1b7/0x7d4 [ 32.491178] [ 32.491398] Last potentially related work creation: [ 32.491995] kasan_save_stack+0x22/0x50 [ 32.492507] __kasan_record_aux_stack+0x8e/0xa0 [ 32.493094] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.493751] remove_vma+0x139/0x170 [ 32.494226] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.494809] do_vmi_munmap+0x1f1/0x2b0 [ 32.495316] __vm_munmap+0x138/0x3a0 [ 32.495795] __x64_sys_munmap+0x59/0x80 [ 32.496303] do_syscall_64+0x3f/0x90 [ 32.496787] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.497441] [ 32.497664] The buggy address belongs to the object at ffff88800c4da9f8 [ 32.497664] which belongs to the cache vm_area_struct of size 168 [ 32.499176] The buggy address is located 88 bytes inside of [ 32.499176] freed 168-byte region [ffff88800c4da9f8, ffff88800c4daaa0) [ 32.500619] [ 32.500843] The buggy address belongs to the physical page: [ 32.501517] page:0000000027d91e29 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc4da [ 32.502642] memcg:ffff888016efb701 [ 32.503077] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.503730] page_type: 0xffffffff() [ 32.504184] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.505104] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016efb701 [ 32.506013] page dumped because: kasan: bad access detected [ 32.506676] [ 32.506896] Memory state around the buggy address: [ 32.507479] ffff88800c4da900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.508400] ffff88800c4da980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.509265] >ffff88800c4daa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.510124] ^ [ 32.510851] ffff88800c4daa80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.511715] ffff88800c4dab00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.512581] ================================================================== [ 32.513600] Disabling lock debugging due to kernel taint [ 34.879714] BUG: Bad rss-counter state mm:00000000f36763ef type:MM_FILEPAGES val:33 [ 34.880795] BUG: Bad rss-counter state mm:00000000f36763ef type:MM_ANONPAGES val:22 [ 35.334912] BUG: Bad rss-counter state mm:00000000eaf7dc41 type:MM_FILEPAGES val:33 [ 35.335475] BUG: Bad rss-counter state mm:00000000eaf7dc41 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44878' (ECDSA) to the list of known hosts. 2023/06/19 15:37:01 fuzzer started 2023/06/19 15:37:01 dialing manager at localhost:44161 2023/06/19 15:37:01 checking machine... 2023/06/19 15:37:01 checking revisions... [ 35.848458] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:37:01 testing simple program... [ 35.879361] cgroup: Unknown subsys name 'net' [ 35.931011] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:36:59 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=00007f00211d2e80 CR3=0000000009a84000 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=2030303a37333a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030303a37333a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=ffff888015887898 RCX=ffffffff83868e94 RDX=ffff88800f3351c0 RSI=0000000000000000 RDI=0000000000000004 RBP=ffff888019f97000 RSP=ffff888015887828 R8 =0000000000000004 R9 =0000000000034000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=0000000000034000 R14=ffff888019f97579 R15=ffff888019f97600 RIP=ffffffff814c01e1 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 00007f04b1e58900 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=00007fff2db41000 CR3=000000000c616000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000