syzkaller login: [ 31.891777] BUG: Bad rss-counter state mm:00000000b3ce517a type:MM_FILEPAGES val:33 [ 31.892938] BUG: Bad rss-counter state mm:00000000b3ce517a type:MM_ANONPAGES val:22 [ 32.058399] ================================================================== [ 32.059327] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.060296] Read of size 8 at addr ffff88800dfd6798 by task sshd/219 [ 32.061098] [ 32.061323] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 32.062480] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.063639] Call Trace: [ 32.064027] [ 32.064365] dump_stack_lvl+0x91/0xf0 [ 32.064956] print_report+0xcc/0x620 [ 32.065579] ? __virt_addr_valid+0x102/0x340 [ 32.066235] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.066961] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.067705] kasan_report+0xbe/0xf0 [ 32.068274] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.069048] vma_interval_tree_remove+0xc75/0xec0 [ 32.069798] vma_prepare+0xc54/0x11a0 [ 32.070401] __split_vma+0x5af/0x950 [ 32.070989] ? __pfx___split_vma+0x10/0x10 [ 32.071652] ? find_held_lock+0x2c/0x110 [ 32.072308] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.073032] ? lock_is_held_type+0x9f/0x120 [ 32.073637] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.074243] ? mtree_range_walk+0x632/0x900 [ 32.074793] ? mas_walk+0x5c7/0x7c0 [ 32.075299] do_vmi_munmap+0x1f1/0x2b0 [ 32.075806] mmap_region+0x1f9/0x2660 [ 32.076297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.076808] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.077526] ? __pfx_lock_acquire+0x10/0x10 [ 32.078062] ? __pfx_mmap_region+0x10/0x10 [ 32.078588] ? security_mmap_addr+0x7d/0xa0 [ 32.079117] ? get_unmapped_area+0x1f5/0x3f0 [ 32.079666] do_mmap+0x854/0xf00 [ 32.080112] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.080621] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.081192] ksys_mmap_pgoff+0x3af/0x500 [ 32.081701] do_syscall_64+0x3f/0x90 [ 32.082181] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.082831] RIP: 0033:0x7f2f64b76d82 [ 32.083292] 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 [ 32.085502] RSP: 002b:00007ffe27744108 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.086401] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f64b76d82 [ 32.087256] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f63fb0000 [ 32.088096] RBP: 00007f2f63fb0000 R08: 0000000000000009 R09: 0000000000001000 [ 32.088941] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b0b6dfec0 [ 32.089785] R13: 00007ffe27744120 R14: 00007ffe27744150 R15: 00007ffe277444b0 [ 32.090646] [ 32.090936] [ 32.091151] Allocated by task 212: [ 32.091585] kasan_save_stack+0x22/0x50 [ 32.092088] kasan_set_track+0x25/0x30 [ 32.092593] __kasan_slab_alloc+0x59/0x70 [ 32.093154] kmem_cache_alloc+0x16b/0x370 [ 32.093681] vm_area_dup+0x20/0x160 [ 32.094157] __split_vma+0x170/0x950 [ 32.094622] split_vma+0xc6/0x110 [ 32.095062] mprotect_fixup+0x8d2/0xb30 [ 32.095570] do_mprotect_pkey+0x87e/0xd40 [ 32.096091] __x64_sys_mprotect+0x78/0xc0 [ 32.096621] do_syscall_64+0x3f/0x90 [ 32.097117] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.097765] [ 32.097984] Freed by task 212: [ 32.098377] kasan_save_stack+0x22/0x50 [ 32.098891] kasan_set_track+0x25/0x30 [ 32.099385] kasan_save_free_info+0x2b/0x50 [ 32.099915] __kasan_slab_free+0x10a/0x190 [ 32.100456] kmem_cache_free+0x10d/0x4d0 [ 32.100969] rcu_core+0x8c8/0x2860 [ 32.101432] __do_softirq+0x1b7/0x7d4 [ 32.101910] [ 32.102122] Last potentially related work creation: [ 32.102721] kasan_save_stack+0x22/0x50 [ 32.103244] __kasan_record_aux_stack+0x8e/0xa0 [ 32.103820] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.104463] remove_vma+0x139/0x170 [ 32.104912] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.105475] do_vmi_munmap+0x1f1/0x2b0 [ 32.105977] __vm_munmap+0x138/0x3a0 [ 32.106456] __x64_sys_munmap+0x59/0x80 [ 32.106970] do_syscall_64+0x3f/0x90 [ 32.107445] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.108093] [ 32.108308] Second to last potentially related work creation: [ 32.108999] kasan_save_stack+0x22/0x50 [ 32.109520] __kasan_record_aux_stack+0x8e/0xa0 [ 32.110107] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.110753] remove_vma+0x139/0x170 [ 32.111206] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.111776] do_vmi_munmap+0x1f1/0x2b0 [ 32.112269] mmap_region+0x1f9/0x2660 [ 32.112743] do_mmap+0x854/0xf00 [ 32.113198] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.113695] ksys_mmap_pgoff+0x7d/0x500 [ 32.114186] do_syscall_64+0x3f/0x90 [ 32.114661] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.115301] [ 32.115515] The buggy address belongs to the object at ffff88800dfd6740 [ 32.115515] which belongs to the cache vm_area_struct of size 168 [ 32.116975] The buggy address is located 88 bytes inside of [ 32.116975] freed 168-byte region [ffff88800dfd6740, ffff88800dfd67e8) [ 32.118398] [ 32.118619] The buggy address belongs to the physical page: [ 32.119281] page:000000003d9c3ea6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdfd6 [ 32.120379] memcg:ffff88800ca68601 [ 32.120831] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.121525] page_type: 0xffffffff() [ 32.121990] raw: 0100000000000200 ffff8880087a0c80 ffffea0000618b00 dead000000000006 [ 32.122952] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca68601 [ 32.123891] page dumped because: kasan: bad access detected [ 32.124575] [ 32.124798] Memory state around the buggy address: [ 32.125427] ffff88800dfd6680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.126330] ffff88800dfd6700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 32.127224] >ffff88800dfd6780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 32.128116] ^ [ 32.128633] ffff88800dfd6800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 32.129521] ffff88800dfd6880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 32.130415] ================================================================== [ 32.131739] Disabling lock debugging due to kernel taint [ 34.535768] BUG: Bad rss-counter state mm:000000004f00dc67 type:MM_FILEPAGES val:33 [ 34.536947] BUG: Bad rss-counter state mm:000000004f00dc67 type:MM_ANONPAGES val:22 [ 35.094155] BUG: Bad rss-counter state mm:000000005dc945f3 type:MM_FILEPAGES val:33 [ 35.095308] BUG: Bad rss-counter state mm:000000005dc945f3 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11544' (ECDSA) to the list of known hosts. 2023/06/20 14:27:57 fuzzer started 2023/06/20 14:27:57 dialing manager at localhost:36067 2023/06/20 14:27:57 checking machine... 2023/06/20 14:27:57 checking revisions... [ 35.734985] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:27:57 testing simple program... [ 35.779092] cgroup: Unknown subsys name 'net' [ 35.850150] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:27:57 Registers: info registers vcpu 0 RAX=0000556953309720 RBX=00005569533006f0 RCX=0000000000000000 RDX=0000000000000005 RSI=0000000000008000 RDI=0000556953300c20 RBP=0000000000000000 RSP=fffffe0000002fd0 R8 =000055695330f2a0 R9 =0000000000000000 R10=0000556952040d0c R11=0000000000000246 R12=0000556953300c20 R13=0000000000000005 R14=0000000000008000 R15=0000556953309720 RIP=ffffffff84601260 RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f0838986900 00000000 00000000 GS =0000 0000000000000000 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=00005569533097e4 CR3=000000000c4a0000 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=00000000000000000000556951fe1060 XMM02=ff000000000000ff0000000000ff0000 XMM03=66207463656e6e6f6373696420646576 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=0d0c0f0e09080b0a0504070601000302 XMM07=00000000000000000000000000000000 XMM08=000a0d732a2e25006c61746166003367 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c04400 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fffef8ff4e8 CR3=000000000b820000 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=2037353a37323a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036353a37323a3431203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000