syzkaller login: [ 33.762273] BUG: Bad rss-counter state mm:00000000a407012e type:MM_FILEPAGES val:33 [ 33.763466] BUG: Bad rss-counter state mm:00000000a407012e type:MM_ANONPAGES val:22 [ 33.799919] ================================================================== [ 33.800812] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.801860] Read of size 8 at addr ffff88801696b140 by task sshd/221 [ 33.802761] [ 33.802984] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.803950] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.805101] Call Trace: [ 33.805463] [ 33.805756] dump_stack_lvl+0x91/0xf0 [ 33.806252] print_report+0xcc/0x620 [ 33.806742] ? __virt_addr_valid+0x102/0x340 [ 33.807301] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.807944] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.808569] kasan_report+0xbe/0xf0 [ 33.809046] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.809669] vma_interval_tree_remove+0xc75/0xec0 [ 33.810273] vma_prepare+0xc54/0x11a0 [ 33.810755] __split_vma+0x5af/0x950 [ 33.811352] ? __pfx___split_vma+0x10/0x10 [ 33.811905] ? find_held_lock+0x2c/0x110 [ 33.812431] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.813000] ? lock_is_held_type+0x9f/0x120 [ 33.813541] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.814153] ? mtree_range_walk+0x632/0x900 [ 33.814705] ? mas_walk+0x5c7/0x7c0 [ 33.815180] do_vmi_munmap+0x1f1/0x2b0 [ 33.815675] mmap_region+0x1f9/0x2660 [ 33.816193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.816704] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.817424] ? __pfx_lock_acquire+0x10/0x10 [ 33.817959] ? __pfx_mmap_region+0x10/0x10 [ 33.818494] ? security_mmap_addr+0x7d/0xa0 [ 33.819026] ? get_unmapped_area+0x1f5/0x3f0 [ 33.819581] do_mmap+0x854/0xf00 [ 33.820044] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.820539] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.821106] ksys_mmap_pgoff+0x3af/0x500 [ 33.821621] do_syscall_64+0x3f/0x90 [ 33.822110] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.822764] RIP: 0033:0x7f0c4d277d82 [ 33.823255] 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 [ 33.825420] RSP: 002b:00007ffd1df15de8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.826330] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0c4d277d82 [ 33.827181] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0c4c6b1000 [ 33.828033] RBP: 00007f0c4c6b1000 R08: 0000000000000009 R09: 0000000000001000 [ 33.828880] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f8a2f93d90 [ 33.829721] R13: 00007ffd1df15e00 R14: 00007ffd1df15e30 R15: 00007ffd1df16190 [ 33.830587] [ 33.830883] [ 33.831101] Allocated by task 214: [ 33.831546] kasan_save_stack+0x22/0x50 [ 33.832072] kasan_set_track+0x25/0x30 [ 33.832570] __kasan_slab_alloc+0x59/0x70 [ 33.833104] kmem_cache_alloc+0x16b/0x370 [ 33.833624] vm_area_dup+0x20/0x160 [ 33.834079] __split_vma+0x170/0x950 [ 33.834548] split_vma+0xc6/0x110 [ 33.834992] mprotect_fixup+0x8d2/0xb30 [ 33.835493] do_mprotect_pkey+0x87e/0xd40 [ 33.836024] __x64_sys_mprotect+0x78/0xc0 [ 33.836545] do_syscall_64+0x3f/0x90 [ 33.837020] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.837664] [ 33.837884] Freed by task 214: [ 33.838279] kasan_save_stack+0x22/0x50 [ 33.838785] kasan_set_track+0x25/0x30 [ 33.839279] kasan_save_free_info+0x2b/0x50 [ 33.839858] __kasan_slab_free+0x10a/0x190 [ 33.840394] kmem_cache_free+0x10d/0x4d0 [ 33.840901] rcu_core+0x8c8/0x2860 [ 33.841344] __do_softirq+0x1b7/0x7d4 [ 33.841821] [ 33.842035] Last potentially related work creation: [ 33.842626] kasan_save_stack+0x22/0x50 [ 33.843129] __kasan_record_aux_stack+0x8e/0xa0 [ 33.843726] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.844368] remove_vma+0x139/0x170 [ 33.844820] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.845381] do_vmi_munmap+0x1f1/0x2b0 [ 33.845877] __vm_munmap+0x138/0x3a0 [ 33.846341] __x64_sys_munmap+0x59/0x80 [ 33.846836] do_syscall_64+0x3f/0x90 [ 33.847309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.847975] [ 33.848188] The buggy address belongs to the object at ffff88801696b0e8 [ 33.848188] which belongs to the cache vm_area_struct of size 168 [ 33.849661] The buggy address is located 88 bytes inside of [ 33.849661] freed 168-byte region [ffff88801696b0e8, ffff88801696b190) [ 33.851070] [ 33.851286] The buggy address belongs to the physical page: [ 33.851952] page:00000000056f472f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1696b [ 33.853037] memcg:ffff888013422f01 [ 33.853466] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.854108] page_type: 0xffffffff() [ 33.854556] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.855478] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013422f01 [ 33.856406] page dumped because: kasan: bad access detected [ 33.857061] [ 33.857280] Memory state around the buggy address: [ 33.857863] ffff88801696b000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.858718] ffff88801696b080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 33.859574] >ffff88801696b100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.860436] ^ [ 33.861075] ffff88801696b180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.861937] ffff88801696b200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.862791] ================================================================== [ 33.864007] Disabling lock debugging due to kernel taint [ 35.849874] BUG: Bad rss-counter state mm:000000009716895e type:MM_FILEPAGES val:33 [ 35.851059] BUG: Bad rss-counter state mm:000000009716895e type:MM_ANONPAGES val:22 [ 36.237722] BUG: Bad rss-counter state mm:000000002b01fcc6 type:MM_FILEPAGES val:33 [ 36.238720] BUG: Bad rss-counter state mm:000000002b01fcc6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59165' (ECDSA) to the list of known hosts. 2023/06/20 08:28:28 fuzzer started 2023/06/20 08:28:28 dialing manager at localhost:44161 2023/06/20 08:28:28 checking machine... 2023/06/20 08:28:28 checking revisions... [ 36.975502] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:28:28 testing simple program... [ 37.023783] cgroup: Unknown subsys name 'net' [ 37.072846] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:28:25 Registers: info registers vcpu 0 RAX=ffffed10018bdf7c RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800eae9b40 RSI=ffffffff8162f8ea RDI=0000000000000007 RBP=0000000000000508 RSP=ffff88800c5efb48 R8 =0000000000000007 R9 =0000000000000000 R10=0000000000000508 R11=2f6e6962732f7273 R12=0000000000000508 R13=ffff88800c5efc00 R14=ffff88800c5efe00 R15=dffffc0000000000 RIP=ffffffff8162f902 RFL=00000282 [--S----] 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 00007f987792f900 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=00007f9877ee70b0 CR3=000000000e9c4000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00000000000000000000000000ff0000 XMM02=00000000000000000000000000ff0000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=6c6f636f746f72702f6374652f006563 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=0000000000000001 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=00007ff05af9cf10 CR3=000000000ffb4000 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=2038323a38323a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38323a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000