syzkaller login: [ 38.839785] BUG: Bad rss-counter state mm:0000000062a165b3 type:MM_FILEPAGES val:33 [ 38.841422] BUG: Bad rss-counter state mm:0000000062a165b3 type:MM_ANONPAGES val:22 [ 39.001246] ================================================================== [ 39.002179] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.003118] Read of size 8 at addr ffff88800da863f8 by task sshd/221 [ 39.004003] [ 39.004227] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 39.005114] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.006155] Call Trace: [ 39.006480] [ 39.006772] dump_stack_lvl+0x91/0xf0 [ 39.007261] print_report+0xcc/0x620 [ 39.007753] ? __virt_addr_valid+0x102/0x340 [ 39.008313] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.008952] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.009572] kasan_report+0xbe/0xf0 [ 39.010066] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.010707] vma_interval_tree_remove+0xc75/0xec0 [ 39.011326] vma_prepare+0xc54/0x11a0 [ 39.011808] __split_vma+0x5af/0x950 [ 39.012282] ? __pfx___split_vma+0x10/0x10 [ 39.012823] ? find_held_lock+0x2c/0x110 [ 39.013355] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.013930] ? lock_is_held_type+0x9f/0x120 [ 39.014477] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.015088] ? mtree_range_walk+0x632/0x900 [ 39.015640] ? mas_walk+0x5c7/0x7c0 [ 39.016120] do_vmi_munmap+0x1f1/0x2b0 [ 39.016620] mmap_region+0x1f9/0x2660 [ 39.017109] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.017615] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.018327] ? __pfx_lock_acquire+0x10/0x10 [ 39.018862] ? __pfx_mmap_region+0x10/0x10 [ 39.019401] ? security_mmap_addr+0x7d/0xa0 [ 39.019938] ? get_unmapped_area+0x1f5/0x3f0 [ 39.020502] do_mmap+0x854/0xf00 [ 39.020968] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.021477] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.022044] ksys_mmap_pgoff+0x3af/0x500 [ 39.022553] do_syscall_64+0x3f/0x90 [ 39.023037] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.023696] RIP: 0033:0x7f6128686d82 [ 39.024161] 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 [ 39.026319] RSP: 002b:00007ffe02e99808 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.027233] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6128686d82 [ 39.028105] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6127ac0000 [ 39.028977] RBP: 00007f6127ac0000 R08: 0000000000000009 R09: 0000000000001000 [ 39.029836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558e0f1abf70 [ 39.030688] R13: 00007ffe02e99820 R14: 00007ffe02e99850 R15: 00007ffe02e99bb0 [ 39.031538] [ 39.031831] [ 39.032047] Allocated by task 213: [ 39.032479] kasan_save_stack+0x22/0x50 [ 39.033005] kasan_set_track+0x25/0x30 [ 39.033496] __kasan_slab_alloc+0x59/0x70 [ 39.034018] kmem_cache_alloc+0x16b/0x370 [ 39.034533] vm_area_dup+0x20/0x160 [ 39.034986] __split_vma+0x170/0x950 [ 39.035454] split_vma+0xc6/0x110 [ 39.035891] mprotect_fixup+0x8d2/0xb30 [ 39.036395] do_mprotect_pkey+0x87e/0xd40 [ 39.036933] __x64_sys_mprotect+0x78/0xc0 [ 39.037448] do_syscall_64+0x3f/0x90 [ 39.037923] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.038568] [ 39.038785] Freed by task 213: [ 39.039179] kasan_save_stack+0x22/0x50 [ 39.039689] kasan_set_track+0x25/0x30 [ 39.040177] kasan_save_free_info+0x2b/0x50 [ 39.040716] __kasan_slab_free+0x10a/0x190 [ 39.041245] kmem_cache_free+0x10d/0x4d0 [ 39.041753] rcu_core+0x8c8/0x2860 [ 39.042197] __do_softirq+0x1b7/0x7d4 [ 39.042672] [ 39.042887] Last potentially related work creation: [ 39.043469] kasan_save_stack+0x22/0x50 [ 39.043975] __kasan_record_aux_stack+0x8e/0xa0 [ 39.044549] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.045208] remove_vma+0x139/0x170 [ 39.045657] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.046210] do_vmi_munmap+0x1f1/0x2b0 [ 39.046697] __vm_munmap+0x138/0x3a0 [ 39.047163] __x64_sys_munmap+0x59/0x80 [ 39.047663] do_syscall_64+0x3f/0x90 [ 39.048136] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.048786] [ 39.049008] The buggy address belongs to the object at ffff88800da863a0 [ 39.049008] which belongs to the cache vm_area_struct of size 168 [ 39.050483] The buggy address is located 88 bytes inside of [ 39.050483] freed 168-byte region [ffff88800da863a0, ffff88800da86448) [ 39.051893] [ 39.052113] The buggy address belongs to the physical page: [ 39.052787] page:00000000020e7a5f refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xda86 [ 39.053865] memcg:ffff88800d4db901 [ 39.054290] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.054934] page_type: 0xffffffff() [ 39.055385] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aa9c0 dead000000000002 [ 39.056309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d4db901 [ 39.057215] page dumped because: kasan: bad access detected [ 39.057879] [ 39.058096] Memory state around the buggy address: [ 39.058679] ffff88800da86280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.059535] ffff88800da86300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.060396] >ffff88800da86380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 39.061268] ^ [ 39.062106] ffff88800da86400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 39.062957] ffff88800da86480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.063819] ================================================================== [ 39.064829] Disabling lock debugging due to kernel taint [ 41.024581] BUG: Bad rss-counter state mm:000000002a3d24eb type:MM_FILEPAGES val:33 [ 41.025607] BUG: Bad rss-counter state mm:000000002a3d24eb type:MM_ANONPAGES val:22 [ 41.543554] BUG: Bad rss-counter state mm:00000000673e1a8f type:MM_FILEPAGES val:33 [ 41.544718] BUG: Bad rss-counter state mm:00000000673e1a8f type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:27184' (ECDSA) to the list of known hosts. 2023/06/21 06:17:43 fuzzer started 2023/06/21 06:17:44 dialing manager at localhost:36067 2023/06/21 06:17:44 checking machine... 2023/06/21 06:17:44 checking revisions... [ 42.154379] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:17:44 testing simple program... [ 42.190038] cgroup: Unknown subsys name 'net' [ 42.235266] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:17:43 Registers: info registers vcpu 0 RAX=ffffffff86098092 RBX=0000000000000001 RCX=ffffffff81132ffd RDX=0000000000000000 RSI=ffffffff86098092 RDI=ffffffff85d92c20 RBP=ffffffff85d92c24 RSP=ffff888015c0f3b8 R8 =ffffffff86098092 R9 =0000000000000000 R10=0000000000038001 R11=0000000000006097 R12=ffffffff85d92c20 R13=ffffffff85d92c20 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9e278d2900 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=00007f9e26d662f0 CR3=0000000009f8c000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=673720e65a2277dc00000000000ae988 XMM05=553ba62aa6533a9d00000000001326b8 XMM06=c291bd5c70af25b90000000000131138 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007f7c0e7610b0 CR3=000000000f2b8000 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=2033343a37313a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a37313a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000