syzkaller login: [ 32.412521] BUG: Bad rss-counter state mm:00000000e443a942 type:MM_FILEPAGES val:33 [ 32.413718] BUG: Bad rss-counter state mm:00000000e443a942 type:MM_ANONPAGES val:22 [ 32.457380] ================================================================== [ 32.458318] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.459209] Read of size 8 at addr ffff88800e232b38 by task sshd/221 [ 32.460078] [ 32.460285] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.461129] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.462066] Call Trace: [ 32.462374] [ 32.462654] dump_stack_lvl+0x91/0xf0 [ 32.463124] print_report+0xcc/0x620 [ 32.463600] ? __virt_addr_valid+0x102/0x340 [ 32.464124] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.464715] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.465319] kasan_report+0xbe/0xf0 [ 32.465783] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.466358] vma_interval_tree_remove+0xc75/0xec0 [ 32.466919] vma_prepare+0xc54/0x11a0 [ 32.467377] __split_vma+0x5af/0x950 [ 32.467845] ? __pfx___split_vma+0x10/0x10 [ 32.468355] ? find_held_lock+0x2c/0x110 [ 32.468940] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.469664] ? lock_is_held_type+0x9f/0x120 [ 32.470334] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.471090] ? mtree_range_walk+0x632/0x900 [ 32.471779] ? mas_walk+0x5c7/0x7c0 [ 32.472363] do_vmi_munmap+0x1f1/0x2b0 [ 32.473006] mmap_region+0x1f9/0x2660 [ 32.473606] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.474241] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.475133] ? __pfx_lock_acquire+0x10/0x10 [ 32.475797] ? __pfx_mmap_region+0x10/0x10 [ 32.476457] ? security_mmap_addr+0x7d/0xa0 [ 32.477137] ? get_unmapped_area+0x1f5/0x3f0 [ 32.477825] do_mmap+0x854/0xf00 [ 32.478370] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.478981] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.479672] ksys_mmap_pgoff+0x3af/0x500 [ 32.480303] do_syscall_64+0x3f/0x90 [ 32.480909] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.481706] RIP: 0033:0x7fcf73c93d82 [ 32.482266] 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 [ 32.484924] RSP: 002b:00007fff8c396228 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.485971] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcf73c93d82 [ 32.486858] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcf730cd000 [ 32.487737] RBP: 00007fcf730cd000 R08: 0000000000000009 R09: 0000000000001000 [ 32.488611] R10: 0000000000000812 R11: 0000000000000206 R12: 00005559d4a9af60 [ 32.489507] R13: 00007fff8c396240 R14: 00007fff8c396270 R15: 00007fff8c3965d0 [ 32.490410] [ 32.490717] [ 32.490942] Allocated by task 214: [ 32.491387] kasan_save_stack+0x22/0x50 [ 32.491909] kasan_set_track+0x25/0x30 [ 32.492418] __kasan_slab_alloc+0x59/0x70 [ 32.492971] kmem_cache_alloc+0x16b/0x370 [ 32.493504] vm_area_dup+0x20/0x160 [ 32.493972] __split_vma+0x170/0x950 [ 32.494455] split_vma+0xc6/0x110 [ 32.494909] mprotect_fixup+0x8d2/0xb30 [ 32.495427] do_mprotect_pkey+0x87e/0xd40 [ 32.495963] __x64_sys_mprotect+0x78/0xc0 [ 32.496502] do_syscall_64+0x3f/0x90 [ 32.497004] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.497662] [ 32.497882] Freed by task 214: [ 32.498291] kasan_save_stack+0x22/0x50 [ 32.498811] kasan_set_track+0x25/0x30 [ 32.499326] kasan_save_free_info+0x2b/0x50 [ 32.499875] __kasan_slab_free+0x10a/0x190 [ 32.500427] kmem_cache_free+0x10d/0x4d0 [ 32.500967] rcu_core+0x8c8/0x2860 [ 32.501428] __do_softirq+0x1b7/0x7d4 [ 32.501918] [ 32.502139] Last potentially related work creation: [ 32.502755] kasan_save_stack+0x22/0x50 [ 32.503281] __kasan_record_aux_stack+0x8e/0xa0 [ 32.503893] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.504556] remove_vma+0x139/0x170 [ 32.505051] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.505632] do_vmi_munmap+0x1f1/0x2b0 [ 32.506135] __vm_munmap+0x138/0x3a0 [ 32.506619] __x64_sys_munmap+0x59/0x80 [ 32.507131] do_syscall_64+0x3f/0x90 [ 32.507613] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.508270] [ 32.508488] The buggy address belongs to the object at ffff88800e232ae0 [ 32.508488] which belongs to the cache vm_area_struct of size 168 [ 32.509985] The buggy address is located 88 bytes inside of [ 32.509985] freed 168-byte region [ffff88800e232ae0, ffff88800e232b88) [ 32.511427] [ 32.511658] The buggy address belongs to the physical page: [ 32.512367] page:00000000d0e91618 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe232 [ 32.513477] memcg:ffff8880164fdf01 [ 32.513916] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.514571] page_type: 0xffffffff() [ 32.515037] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.515984] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880164fdf01 [ 32.516924] page dumped because: kasan: bad access detected [ 32.517602] [ 32.517824] Memory state around the buggy address: [ 32.518407] ffff88800e232a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.519277] ffff88800e232a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 32.520148] >ffff88800e232b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.521022] ^ [ 32.521644] ffff88800e232b80: fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 32.522522] ffff88800e232c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 32.523382] ================================================================== [ 32.524611] Disabling lock debugging due to kernel taint [ 34.238484] BUG: Bad rss-counter state mm:0000000096b937e6 type:MM_FILEPAGES val:33 [ 34.239776] BUG: Bad rss-counter state mm:0000000096b937e6 type:MM_ANONPAGES val:22 [ 34.595371] BUG: Bad rss-counter state mm:00000000513419f9 type:MM_FILEPAGES val:33 [ 34.596111] BUG: Bad rss-counter state mm:00000000513419f9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43570' (ECDSA) to the list of known hosts. 2023/06/19 18:53:27 fuzzer started 2023/06/19 18:53:27 dialing manager at localhost:44161 2023/06/19 18:53:27 checking machine... 2023/06/19 18:53:27 checking revisions... [ 35.329517] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:53:27 testing simple program... [ 35.383445] cgroup: Unknown subsys name 'net' [ 35.421235] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:53:26 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000002 RCX=1ffff1100d9c135e RDX=dffffc0000000000 RSI=ffffffff8180c522 RDI=ffff88806ce09a98 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 RIP=ffffffff81130706 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 00007fded8908900 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=00007fded8ec00b0 CR3=000000000f174000 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=33353a3831203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323631 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=00007fdda06e4000 CR3=00000000101fc000 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=1675481278606dbd7447eea07aac5fdf XMM02=2c67c8bc2e329bc3000000000011c8b8 XMM03=fb795ef6d65770560000000000123e30 XMM04=5429e473a151c7dc00000000000ae988 XMM05=e5def281648b10b90000000000134818 XMM06=c291bd5c70af25b900000000001338b8 XMM07=e042d86d42eb936e00000000001240b0 XMM08=11a4a415984c2cff000000000011c918 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000