syzkaller login: [ 44.461698] BUG: Bad rss-counter state mm:00000000d0948aeb type:MM_FILEPAGES val:33 [ 44.462934] BUG: Bad rss-counter state mm:00000000d0948aeb type:MM_ANONPAGES val:22 [ 44.503938] ================================================================== [ 44.504895] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.506039] Read of size 8 at addr ffff88800d52a6b0 by task sshd/220 [ 44.506852] [ 44.507083] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.507999] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.509045] Call Trace: [ 44.509383] [ 44.509682] dump_stack_lvl+0x91/0xf0 [ 44.510199] print_report+0xcc/0x620 [ 44.510719] ? __virt_addr_valid+0x102/0x340 [ 44.511305] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.511957] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.512615] kasan_report+0xbe/0xf0 [ 44.513156] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.513834] vma_interval_tree_remove+0xc75/0xec0 [ 44.514497] vma_prepare+0xc54/0x11a0 [ 44.515026] __split_vma+0x5af/0x950 [ 44.515545] ? __pfx___split_vma+0x10/0x10 [ 44.516123] ? find_held_lock+0x2c/0x110 [ 44.516700] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.517321] ? lock_is_held_type+0x9f/0x120 [ 44.517911] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.518579] ? mtree_range_walk+0x632/0x900 [ 44.519189] ? mas_walk+0x5c7/0x7c0 [ 44.519708] do_vmi_munmap+0x1f1/0x2b0 [ 44.520240] mmap_region+0x1f9/0x2660 [ 44.520773] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.521347] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.522130] ? __pfx_lock_acquire+0x10/0x10 [ 44.522715] ? __pfx_mmap_region+0x10/0x10 [ 44.523295] ? security_mmap_addr+0x7d/0xa0 [ 44.523885] ? get_unmapped_area+0x1f5/0x3f0 [ 44.524491] do_mmap+0x854/0xf00 [ 44.524967] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.525516] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.526132] ksys_mmap_pgoff+0x3af/0x500 [ 44.526690] do_syscall_64+0x3f/0x90 [ 44.527212] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.527917] RIP: 0033:0x7fd82e7f5d82 [ 44.528418] 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 [ 44.530933] RSP: 002b:00007ffe5b594498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.531922] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd82e7f5d82 [ 44.532851] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd82dc2f000 [ 44.533791] RBP: 00007fd82dc2f000 R08: 0000000000000009 R09: 0000000000001000 [ 44.534718] R10: 0000000000000812 R11: 0000000000000206 R12: 000055fb414d9d90 [ 44.535651] R13: 00007ffe5b5944b0 R14: 00007ffe5b5944e0 R15: 00007ffe5b594840 [ 44.536591] [ 44.536914] [ 44.537161] Allocated by task 213: [ 44.537633] kasan_save_stack+0x22/0x50 [ 44.538178] kasan_set_track+0x25/0x30 [ 44.538718] __kasan_slab_alloc+0x59/0x70 [ 44.539296] kmem_cache_alloc+0x16b/0x370 [ 44.539866] vm_area_dup+0x20/0x160 [ 44.540368] __split_vma+0x170/0x950 [ 44.540881] split_vma+0xc6/0x110 [ 44.541381] mprotect_fixup+0x8d2/0xb30 [ 44.541932] do_mprotect_pkey+0x87e/0xd40 [ 44.542508] __x64_sys_mprotect+0x78/0xc0 [ 44.543080] do_syscall_64+0x3f/0x90 [ 44.543602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.544308] [ 44.544542] Freed by task 19: [ 44.544964] kasan_save_stack+0x22/0x50 [ 44.545526] kasan_set_track+0x25/0x30 [ 44.546065] kasan_save_free_info+0x2b/0x50 [ 44.546647] __kasan_slab_free+0x10a/0x190 [ 44.547225] kmem_cache_free+0x10d/0x4d0 [ 44.547784] rcu_core+0x8c8/0x2860 [ 44.548271] __do_softirq+0x1b7/0x7d4 [ 44.548794] [ 44.549021] Last potentially related work creation: [ 44.549687] kasan_save_stack+0x22/0x50 [ 44.550236] __kasan_record_aux_stack+0x8e/0xa0 [ 44.550861] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.551569] remove_vma+0x139/0x170 [ 44.552058] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.552669] do_vmi_munmap+0x1f1/0x2b0 [ 44.553196] __vm_munmap+0x138/0x3a0 [ 44.553698] __x64_sys_munmap+0x59/0x80 [ 44.554236] do_syscall_64+0x3f/0x90 [ 44.554741] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.555425] [ 44.555653] The buggy address belongs to the object at ffff88800d52a658 [ 44.555653] which belongs to the cache vm_area_struct of size 168 [ 44.557222] The buggy address is located 88 bytes inside of [ 44.557222] freed 168-byte region [ffff88800d52a658, ffff88800d52a700) [ 44.558756] [ 44.558998] The buggy address belongs to the physical page: [ 44.559725] page:00000000e6c45898 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd52a [ 44.560923] memcg:ffff88800c5e9d01 [ 44.561411] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.562135] page_type: 0xffffffff() [ 44.562637] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.563653] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5e9d01 [ 44.564658] page dumped because: kasan: bad access detected [ 44.565404] [ 44.565644] Memory state around the buggy address: [ 44.566291] ffff88800d52a580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 44.567248] ffff88800d52a600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 44.568201] >ffff88800d52a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.569153] ^ [ 44.569804] ffff88800d52a700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 44.570752] ffff88800d52a780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 44.571704] ================================================================== [ 44.573497] Disabling lock debugging due to kernel taint [ 46.785147] BUG: Bad rss-counter state mm:000000000358c550 type:MM_FILEPAGES val:33 [ 46.786157] BUG: Bad rss-counter state mm:000000000358c550 type:MM_ANONPAGES val:22 [ 47.344356] BUG: Bad rss-counter state mm:000000008dc7ad9a type:MM_FILEPAGES val:33 [ 47.345446] BUG: Bad rss-counter state mm:000000008dc7ad9a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2518' (ECDSA) to the list of known hosts. 2023/06/20 10:03:42 fuzzer started 2023/06/20 10:03:42 dialing manager at localhost:44161 2023/06/20 10:03:42 checking machine... 2023/06/20 10:03:42 checking revisions... [ 48.066965] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:03:42 testing simple program... [ 48.113503] cgroup: Unknown subsys name 'net' [ 48.177569] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:03:36 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=00007f1a26dba040 CR3=000000000caf6000 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=33303a3031203032206e754a3e38333c XMM01=656e6e6f637369642064657669656365 XMM02=63736964203a31313a34363232342074 XMM03=66207463656e6e6f6373696420646576 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320343632 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=0000000000000007 RBX=ffff88800e64fe00 RCX=ffffffff81af95ba RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800e64fdb0 RSP=ffff88800e64fbb8 R8 =0000000000000001 R9 =ffffed100326091e R10=ffff8880193048f7 R11=0000000000000000 R12=0000000000000000 R13=ffff888019304808 R14=ffff88800e64fdb0 R15=ffff88800e64fe00 RIP=ffffffff814c0388 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 00007f786bfff700 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=00007fe522a6e0b0 CR3=000000000caf6000 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=2031343a33303a3031203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a33303a3031203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000