syzkaller login: [ 45.278272] BUG: Bad rss-counter state mm:00000000afb322e4 type:MM_FILEPAGES val:33 [ 45.279416] BUG: Bad rss-counter state mm:00000000afb322e4 type:MM_ANONPAGES val:22 [ 45.458508] ================================================================== [ 45.459537] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 45.460702] Read of size 8 at addr ffff88800d8025c8 by task sshd/221 [ 45.461610] [ 45.461862] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 45.462843] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 45.463937] Call Trace: [ 45.464301] [ 45.464630] dump_stack_lvl+0x91/0xf0 [ 45.465169] print_report+0xcc/0x620 [ 45.465727] ? __virt_addr_valid+0x102/0x340 [ 45.466381] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.467090] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.467787] kasan_report+0xbe/0xf0 [ 45.468332] ? vma_interval_tree_remove+0xc75/0xec0 [ 45.469027] vma_interval_tree_remove+0xc75/0xec0 [ 45.469706] vma_prepare+0xc54/0x11a0 [ 45.470228] __split_vma+0x5af/0x950 [ 45.470739] ? __pfx___split_vma+0x10/0x10 [ 45.471319] ? find_held_lock+0x2c/0x110 [ 45.471881] do_vmi_align_munmap+0x2ba/0x11f0 [ 45.472491] ? lock_is_held_type+0x9f/0x120 [ 45.473084] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 45.473753] ? mtree_range_walk+0x632/0x900 [ 45.474323] ? mas_walk+0x5c7/0x7c0 [ 45.474807] do_vmi_munmap+0x1f1/0x2b0 [ 45.475313] mmap_region+0x1f9/0x2660 [ 45.475825] ? vm_mmap_pgoff+0x15c/0x3a0 [ 45.476375] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 45.477139] ? __pfx_lock_acquire+0x10/0x10 [ 45.477729] ? __pfx_mmap_region+0x10/0x10 [ 45.478301] ? security_mmap_addr+0x7d/0xa0 [ 45.478872] ? get_unmapped_area+0x1f5/0x3f0 [ 45.479459] do_mmap+0x854/0xf00 [ 45.479930] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.480463] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 45.481133] ksys_mmap_pgoff+0x3af/0x500 [ 45.481729] do_syscall_64+0x3f/0x90 [ 45.482237] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.482912] RIP: 0033:0x7efde7f90d82 [ 45.483383] 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 [ 45.485574] RSP: 002b:00007fff500b6b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 45.486596] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efde7f90d82 [ 45.487549] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efde73ca000 [ 45.488495] RBP: 00007efde73ca000 R08: 0000000000000009 R09: 0000000000001000 [ 45.489458] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564608212ec0 [ 45.490441] R13: 00007fff500b6b70 R14: 00007fff500b6ba0 R15: 00007fff500b6f00 [ 45.491438] [ 45.491782] [ 45.492026] Allocated by task 214: [ 45.492533] kasan_save_stack+0x22/0x50 [ 45.493106] kasan_set_track+0x25/0x30 [ 45.493700] __kasan_slab_alloc+0x59/0x70 [ 45.494280] kmem_cache_alloc+0x16b/0x370 [ 45.494851] vm_area_dup+0x20/0x160 [ 45.495355] __split_vma+0x170/0x950 [ 45.495874] split_vma+0xc6/0x110 [ 45.496364] mprotect_fixup+0x8d2/0xb30 [ 45.496923] do_mprotect_pkey+0x87e/0xd40 [ 45.497513] __x64_sys_mprotect+0x78/0xc0 [ 45.498094] do_syscall_64+0x3f/0x90 [ 45.498617] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.499322] [ 45.499554] Freed by task 13: [ 45.499982] kasan_save_stack+0x22/0x50 [ 45.500539] kasan_set_track+0x25/0x30 [ 45.501089] kasan_save_free_info+0x2b/0x50 [ 45.501702] __kasan_slab_free+0x10a/0x190 [ 45.502300] kmem_cache_free+0x10d/0x4d0 [ 45.502869] rcu_core+0x8c8/0x2860 [ 45.503360] __do_softirq+0x1b7/0x7d4 [ 45.503891] [ 45.504129] Last potentially related work creation: [ 45.504779] kasan_save_stack+0x22/0x50 [ 45.505350] __kasan_record_aux_stack+0x8e/0xa0 [ 45.505988] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.506703] remove_vma+0x139/0x170 [ 45.507205] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.507817] do_vmi_munmap+0x1f1/0x2b0 [ 45.508344] __vm_munmap+0x138/0x3a0 [ 45.508852] __x64_sys_munmap+0x59/0x80 [ 45.509422] do_syscall_64+0x3f/0x90 [ 45.509947] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.510640] [ 45.510875] Second to last potentially related work creation: [ 45.511623] kasan_save_stack+0x22/0x50 [ 45.512192] __kasan_record_aux_stack+0x8e/0xa0 [ 45.512847] __call_rcu_common.constprop.0+0x6a/0xb90 [ 45.513566] remove_vma+0x139/0x170 [ 45.514104] do_vmi_align_munmap+0xd4a/0x11f0 [ 45.514746] do_vmi_munmap+0x1f1/0x2b0 [ 45.515311] mmap_region+0x1f9/0x2660 [ 45.515869] do_mmap+0x854/0xf00 [ 45.516380] vm_mmap_pgoff+0x1a6/0x3a0 [ 45.516976] ksys_mmap_pgoff+0x3af/0x500 [ 45.517568] do_syscall_64+0x3f/0x90 [ 45.518129] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 45.518882] [ 45.519134] The buggy address belongs to the object at ffff88800d802570 [ 45.519134] which belongs to the cache vm_area_struct of size 168 [ 45.520861] The buggy address is located 88 bytes inside of [ 45.520861] freed 168-byte region [ffff88800d802570, ffff88800d802618) [ 45.522512] [ 45.522763] The buggy address belongs to the physical page: [ 45.523539] page:000000001bb8fd73 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd802 [ 45.524794] memcg:ffff88800ef15301 [ 45.525299] flags: 0x100000000000200(slab|node=0|zone=1) [ 45.526017] page_type: 0xffffffff() [ 45.526501] raw: 0100000000000200 ffff88800879fc80 ffffea00003af500 dead000000000004 [ 45.527488] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ef15301 [ 45.528483] page dumped because: kasan: bad access detected [ 45.529222] [ 45.529460] Memory state around the buggy address: [ 45.530098] ffff88800d802480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.531052] ffff88800d802500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 45.532016] >ffff88800d802580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 45.532969] ^ [ 45.533708] ffff88800d802600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 45.534666] ffff88800d802680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 45.535668] ================================================================== [ 45.536857] Disabling lock debugging due to kernel taint [ 47.202570] BUG: Bad rss-counter state mm:000000008ece3432 type:MM_FILEPAGES val:33 [ 47.203654] BUG: Bad rss-counter state mm:000000008ece3432 type:MM_ANONPAGES val:22 [ 47.668119] BUG: Bad rss-counter state mm:00000000cb149eda type:MM_FILEPAGES val:33 [ 47.669218] BUG: Bad rss-counter state mm:00000000cb149eda type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2123' (ECDSA) to the list of known hosts. 2023/06/19 14:04:35 fuzzer started 2023/06/19 14:04:35 dialing manager at localhost:44161 2023/06/19 14:04:35 checking machine... 2023/06/19 14:04:35 checking revisions... [ 48.377755] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:04:35 testing simple program... [ 48.421986] cgroup: Unknown subsys name 'net' [ 48.470549] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:04:18 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffff88801028ddc0 RCX=0000000000000000 RDX=ffff88801857b680 RSI=000000000000001d RDI=0000000000000028 RBP=000000000000001d RSP=ffff88801650f840 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000008 R11=6873733d6c616e69 R12=000000000000001d R13=ffffffff854ee9e0 R14=0000000000000090 R15=0000000000000450 RIP=ffffffff814c0384 RFL=00000293 [--S-A-C] 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 00007fa0c7be3900 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=00007ffdc3915000 CR3=000000000e8c0000 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=6720646572637465733a4d41503d706f 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 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=00007fba647e4ae0 CR3=0000000016c26000 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=34303a3431203931206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3033325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320383934 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000