syzkaller login: [ 36.591244] BUG: Bad rss-counter state mm:000000001421fa6f type:MM_FILEPAGES val:33 [ 36.592258] BUG: Bad rss-counter state mm:000000001421fa6f type:MM_ANONPAGES val:22 [ 36.756216] ================================================================== [ 36.757136] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.758081] Read of size 8 at addr ffff88800dfc0c20 by task sshd/220 [ 36.758942] [ 36.759175] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 36.760040] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.761077] Call Trace: [ 36.761399] [ 36.761680] dump_stack_lvl+0x91/0xf0 [ 36.762174] print_report+0xcc/0x620 [ 36.762662] ? __virt_addr_valid+0x102/0x340 [ 36.763216] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.763842] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.764472] kasan_report+0xbe/0xf0 [ 36.764955] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.765585] vma_interval_tree_remove+0xc75/0xec0 [ 36.766196] vma_prepare+0xc54/0x11a0 [ 36.766680] __split_vma+0x5af/0x950 [ 36.767155] ? __pfx___split_vma+0x10/0x10 [ 36.767689] ? find_held_lock+0x2c/0x110 [ 36.768207] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.768794] ? lock_is_held_type+0x9f/0x120 [ 36.769336] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.769947] ? mtree_range_walk+0x632/0x900 [ 36.770499] ? mas_walk+0x5c7/0x7c0 [ 36.770976] do_vmi_munmap+0x1f1/0x2b0 [ 36.771466] mmap_region+0x1f9/0x2660 [ 36.771945] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.772474] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.773195] ? __pfx_lock_acquire+0x10/0x10 [ 36.773735] ? __pfx_mmap_region+0x10/0x10 [ 36.774271] ? security_mmap_addr+0x7d/0xa0 [ 36.774803] ? get_unmapped_area+0x1f5/0x3f0 [ 36.775363] do_mmap+0x854/0xf00 [ 36.775802] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.776302] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.776875] ksys_mmap_pgoff+0x3af/0x500 [ 36.777381] do_syscall_64+0x3f/0x90 [ 36.777860] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.778509] RIP: 0033:0x7fbe7a9c3d82 [ 36.778970] 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 [ 36.781127] RSP: 002b:00007ffe671b0f48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.782043] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbe7a9c3d82 [ 36.782896] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbe79dfd000 [ 36.783752] RBP: 00007fbe79dfd000 R08: 0000000000000009 R09: 0000000000001000 [ 36.784620] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562402744ec0 [ 36.785468] R13: 00007ffe671b0f60 R14: 00007ffe671b0f90 R15: 00007ffe671b12f0 [ 36.786331] [ 36.786628] [ 36.786844] Allocated by task 213: [ 36.787276] kasan_save_stack+0x22/0x50 [ 36.787783] kasan_set_track+0x25/0x30 [ 36.788280] __kasan_slab_alloc+0x59/0x70 [ 36.788825] kmem_cache_alloc+0x16b/0x370 [ 36.789370] vm_area_dup+0x20/0x160 [ 36.789839] __split_vma+0x170/0x950 [ 36.790306] split_vma+0xc6/0x110 [ 36.790750] mprotect_fixup+0x8d2/0xb30 [ 36.791258] do_mprotect_pkey+0x87e/0xd40 [ 36.791781] __x64_sys_mprotect+0x78/0xc0 [ 36.792310] do_syscall_64+0x3f/0x90 [ 36.792804] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.793454] [ 36.793671] Freed by task 213: [ 36.794066] kasan_save_stack+0x22/0x50 [ 36.794573] kasan_set_track+0x25/0x30 [ 36.795065] kasan_save_free_info+0x2b/0x50 [ 36.795598] __kasan_slab_free+0x10a/0x190 [ 36.796135] kmem_cache_free+0x10d/0x4d0 [ 36.796652] rcu_core+0x8c8/0x2860 [ 36.797104] __do_softirq+0x1b7/0x7d4 [ 36.797579] [ 36.797793] Last potentially related work creation: [ 36.798383] kasan_save_stack+0x22/0x50 [ 36.798885] __kasan_record_aux_stack+0x8e/0xa0 [ 36.799459] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.800116] remove_vma+0x139/0x170 [ 36.800579] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.801141] do_vmi_munmap+0x1f1/0x2b0 [ 36.801622] __vm_munmap+0x138/0x3a0 [ 36.802092] __x64_sys_munmap+0x59/0x80 [ 36.802588] do_syscall_64+0x3f/0x90 [ 36.803060] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.803703] [ 36.803918] The buggy address belongs to the object at ffff88800dfc0bc8 [ 36.803918] which belongs to the cache vm_area_struct of size 168 [ 36.805417] The buggy address is located 88 bytes inside of [ 36.805417] freed 168-byte region [ffff88800dfc0bc8, ffff88800dfc0c70) [ 36.806848] [ 36.807065] The buggy address belongs to the physical page: [ 36.807723] page:0000000038c9ebc5 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfc0 [ 36.808819] memcg:ffff88800cb07e01 [ 36.809249] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.809904] page_type: 0xffffffff() [ 36.810355] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 36.811280] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb07e01 [ 36.812195] page dumped because: kasan: bad access detected [ 36.812866] [ 36.813092] Memory state around the buggy address: [ 36.813681] ffff88800dfc0b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.814536] ffff88800dfc0b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 36.815385] >ffff88800dfc0c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 36.816236] ^ [ 36.816782] ffff88800dfc0c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 36.817649] ffff88800dfc0d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 36.818519] ================================================================== [ 36.819512] Disabling lock debugging due to kernel taint [ 39.165865] BUG: Bad rss-counter state mm:00000000d918b100 type:MM_FILEPAGES val:33 [ 39.167100] BUG: Bad rss-counter state mm:00000000d918b100 type:MM_ANONPAGES val:22 [ 39.655023] BUG: Bad rss-counter state mm:00000000b49f6cd5 type:MM_FILEPAGES val:33 [ 39.656266] BUG: Bad rss-counter state mm:00000000b49f6cd5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31707' (ECDSA) to the list of known hosts. 2023/06/19 14:45:06 fuzzer started 2023/06/19 14:45:06 dialing manager at localhost:44161 2023/06/19 14:45:06 checking machine... 2023/06/19 14:45:06 checking revisions... [ 40.278666] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:45:06 testing simple program... [ 40.337012] cgroup: Unknown subsys name 'net' [ 40.383851] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:45:00 Registers: info registers vcpu 0 RAX=ffffffff84600055 RBX=ffffffff86053a30 RCX=ffffffff846000a9 RDX=0000000000000000 RSI=ffffffff864b9d50 RDI=ffffffff86053a2c RBP=ffffffff86053a34 RSP=ffff888017c97350 R8 =ffffffff864b9d50 R9 =ffff888017c97448 R10=0000000000038001 R11=00000000000b6996 R12=ffffffff86053a30 R13=ffffffff86053a2c R14=0000000000000001 R15=dffffc0000000000 RIP=ffffffff8112fcab RFL=00000212 [----A--] 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 00007f03ac690700 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=00007fa32d1830b0 CR3=0000000015f62000 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=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3932325b646873732036303a3534 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320303033 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=00007f5b8dc80c60 CR3=0000000015f62000 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=2036303a35343a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035303a35343a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000