syzkaller login: [ 31.217637] BUG: Bad rss-counter state mm:000000003ea1b8d7 type:MM_FILEPAGES val:33 [ 31.218377] BUG: Bad rss-counter state mm:000000003ea1b8d7 type:MM_ANONPAGES val:22 [ 31.330735] ================================================================== [ 31.331394] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.332042] Read of size 8 at addr ffff88800f75ddf0 by task sshd/219 [ 31.332558] [ 31.332706] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.333294] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.333970] Call Trace: [ 31.334185] [ 31.334378] dump_stack_lvl+0x91/0xf0 [ 31.334716] print_report+0xcc/0x620 [ 31.335052] ? __virt_addr_valid+0x102/0x340 [ 31.335426] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.335949] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.336373] kasan_report+0xbe/0xf0 [ 31.336708] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.337134] vma_interval_tree_remove+0xc75/0xec0 [ 31.337560] vma_prepare+0xc54/0x11a0 [ 31.337909] __split_vma+0x5af/0x950 [ 31.338229] ? __pfx___split_vma+0x10/0x10 [ 31.338591] ? find_held_lock+0x2c/0x110 [ 31.338945] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.339331] ? lock_is_held_type+0x9f/0x120 [ 31.339698] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.340108] ? mtree_range_walk+0x632/0x900 [ 31.340485] ? mas_walk+0x5c7/0x7c0 [ 31.340808] do_vmi_munmap+0x1f1/0x2b0 [ 31.341145] mmap_region+0x1f9/0x2660 [ 31.341509] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.341863] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.342360] ? __pfx_lock_acquire+0x10/0x10 [ 31.342733] ? __pfx_mmap_region+0x10/0x10 [ 31.343099] ? security_mmap_addr+0x7d/0xa0 [ 31.343464] ? get_unmapped_area+0x1f5/0x3f0 [ 31.343849] do_mmap+0x854/0xf00 [ 31.344157] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.344493] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.344876] ksys_mmap_pgoff+0x3af/0x500 [ 31.345232] do_syscall_64+0x3f/0x90 [ 31.345573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.346020] RIP: 0033:0x7fc567bbfd82 [ 31.346328] 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 [ 31.347801] RSP: 002b:00007ffc9ccb4278 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.348432] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc567bbfd82 [ 31.349008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc566ff9000 [ 31.349589] RBP: 00007fc566ff9000 R08: 0000000000000009 R09: 0000000000001000 [ 31.350162] R10: 0000000000000812 R11: 0000000000000206 R12: 00005625a0577ec0 [ 31.350746] R13: 00007ffc9ccb4290 R14: 00007ffc9ccb42c0 R15: 00007ffc9ccb4620 [ 31.351338] [ 31.351545] [ 31.351698] Allocated by task 212: [ 31.351997] kasan_save_stack+0x22/0x50 [ 31.352339] kasan_set_track+0x25/0x30 [ 31.352694] __kasan_slab_alloc+0x59/0x70 [ 31.353052] kmem_cache_alloc+0x16b/0x370 [ 31.353409] vm_area_dup+0x20/0x160 [ 31.353743] __split_vma+0x170/0x950 [ 31.354060] split_vma+0xc6/0x110 [ 31.354354] mprotect_fixup+0x8d2/0xb30 [ 31.354698] do_mprotect_pkey+0x87e/0xd40 [ 31.355056] __x64_sys_mprotect+0x78/0xc0 [ 31.355410] do_syscall_64+0x3f/0x90 [ 31.355734] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.356178] [ 31.356329] Freed by task 19: [ 31.356591] kasan_save_stack+0x22/0x50 [ 31.356935] kasan_set_track+0x25/0x30 [ 31.357278] kasan_save_free_info+0x2b/0x50 [ 31.357658] __kasan_slab_free+0x10a/0x190 [ 31.358024] kmem_cache_free+0x10d/0x4d0 [ 31.358369] rcu_core+0x8c8/0x2860 [ 31.358670] __do_softirq+0x1b7/0x7d4 [ 31.359000] [ 31.359148] Last potentially related work creation: [ 31.359562] kasan_save_stack+0x22/0x50 [ 31.359912] __kasan_record_aux_stack+0x8e/0xa0 [ 31.360312] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.360766] remove_vma+0x139/0x170 [ 31.361072] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.361454] do_vmi_munmap+0x1f1/0x2b0 [ 31.361803] __vm_munmap+0x138/0x3a0 [ 31.362126] __x64_sys_munmap+0x59/0x80 [ 31.362465] do_syscall_64+0x3f/0x90 [ 31.362789] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.363226] [ 31.363379] The buggy address belongs to the object at ffff88800f75dd98 [ 31.363379] which belongs to the cache vm_area_struct of size 168 [ 31.364376] The buggy address is located 88 bytes inside of [ 31.364376] freed 168-byte region [ffff88800f75dd98, ffff88800f75de40) [ 31.365328] [ 31.365477] The buggy address belongs to the physical page: [ 31.365937] page:00000000cdc02d62 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf75d [ 31.366688] memcg:ffff888009803f01 [ 31.366986] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.367426] page_type: 0xffffffff() [ 31.367729] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.368357] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009803f01 [ 31.368973] page dumped because: kasan: bad access detected [ 31.369423] [ 31.369593] Memory state around the buggy address: [ 31.369983] ffff88800f75dc80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 31.370562] ffff88800f75dd00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 31.371163] >ffff88800f75dd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.371748] ^ [ 31.372298] ffff88800f75de00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.372880] ffff88800f75de80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.373456] ================================================================== [ 31.374170] Disabling lock debugging due to kernel taint [ 32.806926] BUG: Bad rss-counter state mm:0000000043a54e41 type:MM_FILEPAGES val:33 [ 32.807642] BUG: Bad rss-counter state mm:0000000043a54e41 type:MM_ANONPAGES val:22 [ 33.162903] BUG: Bad rss-counter state mm:00000000a0c346bb type:MM_FILEPAGES val:33 [ 33.163651] BUG: Bad rss-counter state mm:00000000a0c346bb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59907' (ECDSA) to the list of known hosts. 2023/06/21 09:37:08 fuzzer started 2023/06/21 09:37:09 dialing manager at localhost:36067 2023/06/21 09:37:09 checking machine... 2023/06/21 09:37:09 checking revisions... [ 33.712337] kmemleak: Automatic memory scanning thread ended 2023/06/21 09:37:09 testing simple program... [ 33.752547] cgroup: Unknown subsys name 'net' [ 33.784099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:37:08 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=0000000000000001 RCX=ffffffff861414ba RDX=0000000000000000 RSI=1ffff1100302cefc RDI=0000000000000001 RBP=ffff8880181677f8 RSP=ffff888018167730 R8 =ffffffff861414be R9 =ffff8880181677e0 R10=0000000000038001 R11=00000000000223eb R12=ffff888018167800 R13=ffff8880181677e8 R14=ffff8880181677e1 R15=ffff8880181677a0 RIP=ffffffff81130af5 RFL=00000216 [----AP-] 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 00007f6d00312900 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=00007f6d008c7650 CR3=000000001812e000 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=ffffffff00ffffffffffffffffffffff XMM01=707465675f6c697475646f6d6d61705f 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=0000000000000001 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=00007ffdcebdecc8 CR3=000000000fe70000 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=2038303a37333a3930203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038303a37333a3930203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000