syzkaller login: [ 31.134861] BUG: Bad rss-counter state mm:00000000522023bb type:MM_FILEPAGES val:33 [ 31.135937] BUG: Bad rss-counter state mm:00000000522023bb type:MM_ANONPAGES val:22 [ 31.315442] ================================================================== [ 31.316432] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.317425] Read of size 8 at addr ffff8880158d0a50 by task sshd/221 [ 31.318227] [ 31.318537] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.319438] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.320479] Call Trace: [ 31.320849] [ 31.321178] dump_stack_lvl+0x91/0xf0 [ 31.321706] print_report+0xcc/0x620 [ 31.322231] ? __virt_addr_valid+0x102/0x340 [ 31.322822] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.323466] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.324139] kasan_report+0xbe/0xf0 [ 31.324667] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.325329] vma_interval_tree_remove+0xc75/0xec0 [ 31.325970] vma_prepare+0xc54/0x11a0 [ 31.326491] __split_vma+0x5af/0x950 [ 31.327002] ? __pfx___split_vma+0x10/0x10 [ 31.327568] ? find_held_lock+0x2c/0x110 [ 31.328127] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.328771] ? lock_is_held_type+0x9f/0x120 [ 31.329341] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.329993] ? mtree_range_walk+0x632/0x900 [ 31.330579] ? mas_walk+0x5c7/0x7c0 [ 31.331090] do_vmi_munmap+0x1f1/0x2b0 [ 31.331608] mmap_region+0x1f9/0x2660 [ 31.332124] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.332692] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.333455] ? __pfx_lock_acquire+0x10/0x10 [ 31.334033] ? __pfx_mmap_region+0x10/0x10 [ 31.334601] ? security_mmap_addr+0x7d/0xa0 [ 31.335166] ? get_unmapped_area+0x1f5/0x3f0 [ 31.335757] do_mmap+0x854/0xf00 [ 31.336235] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.336767] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.337377] ksys_mmap_pgoff+0x3af/0x500 [ 31.337927] do_syscall_64+0x3f/0x90 [ 31.338438] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.339132] RIP: 0033:0x7f2cc36fad82 [ 31.339621] 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 [ 31.341913] RSP: 002b:00007ffc0d2d2e38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.342876] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2cc36fad82 [ 31.343781] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2cc2b34000 [ 31.344690] RBP: 00007f2cc2b34000 R08: 0000000000000009 R09: 0000000000001000 [ 31.345595] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558f20677ec0 [ 31.346510] R13: 00007ffc0d2d2e50 R14: 00007ffc0d2d2e80 R15: 00007ffc0d2d31e0 [ 31.347432] [ 31.347747] [ 31.347979] Allocated by task 214: [ 31.348437] kasan_save_stack+0x22/0x50 [ 31.348983] kasan_set_track+0x25/0x30 [ 31.349512] __kasan_slab_alloc+0x59/0x70 [ 31.350071] kmem_cache_alloc+0x16b/0x370 [ 31.350634] vm_area_dup+0x20/0x160 [ 31.351121] __split_vma+0x170/0x950 [ 31.351618] split_vma+0xc6/0x110 [ 31.352090] mprotect_fixup+0x8d2/0xb30 [ 31.352645] do_mprotect_pkey+0x87e/0xd40 [ 31.353215] __x64_sys_mprotect+0x78/0xc0 [ 31.353771] do_syscall_64+0x3f/0x90 [ 31.354268] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.354956] [ 31.355182] Freed by task 214: [ 31.355605] kasan_save_stack+0x22/0x50 [ 31.356144] kasan_set_track+0x25/0x30 [ 31.356677] kasan_save_free_info+0x2b/0x50 [ 31.357241] __kasan_slab_free+0x10a/0x190 [ 31.357806] kmem_cache_free+0x10d/0x4d0 [ 31.358368] rcu_core+0x8c8/0x2860 [ 31.358844] __do_softirq+0x1b7/0x7d4 [ 31.359351] [ 31.359583] Last potentially related work creation: [ 31.360221] kasan_save_stack+0x22/0x50 [ 31.360768] __kasan_record_aux_stack+0x8e/0xa0 [ 31.361376] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.362060] remove_vma+0x139/0x170 [ 31.362545] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.363153] do_vmi_munmap+0x1f1/0x2b0 [ 31.363678] __vm_munmap+0x138/0x3a0 [ 31.364184] __x64_sys_munmap+0x59/0x80 [ 31.364713] do_syscall_64+0x3f/0x90 [ 31.365222] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.365903] [ 31.366136] The buggy address belongs to the object at ffff8880158d09f8 [ 31.366136] which belongs to the cache vm_area_struct of size 168 [ 31.367708] The buggy address is located 88 bytes inside of [ 31.367708] freed 168-byte region [ffff8880158d09f8, ffff8880158d0aa0) [ 31.369246] [ 31.369475] The buggy address belongs to the physical page: [ 31.370171] page:00000000496bc7bb refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x158d0 [ 31.371333] memcg:ffff8880159bc501 [ 31.371792] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.372487] page_type: 0xffffffff() [ 31.372960] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.373930] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880159bc501 [ 31.374892] page dumped because: kasan: bad access detected [ 31.375593] [ 31.375821] Memory state around the buggy address: [ 31.376434] ffff8880158d0900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.377343] ffff8880158d0980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 31.378243] >ffff8880158d0a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.379131] ^ [ 31.379886] ffff8880158d0a80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 31.380797] ffff8880158d0b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.381686] ================================================================== [ 31.382756] Disabling lock debugging due to kernel taint [ 33.333265] BUG: Bad rss-counter state mm:0000000084dcd2d4 type:MM_FILEPAGES val:33 [ 33.334561] BUG: Bad rss-counter state mm:0000000084dcd2d4 type:MM_ANONPAGES val:22 [ 33.695926] BUG: Bad rss-counter state mm:000000001019ec88 type:MM_FILEPAGES val:33 [ 33.696712] BUG: Bad rss-counter state mm:000000001019ec88 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35947' (ECDSA) to the list of known hosts. 2023/06/19 15:54:57 fuzzer started 2023/06/19 15:54:57 dialing manager at localhost:44161 2023/06/19 15:54:57 checking machine... 2023/06/19 15:54:57 checking revisions... [ 34.418375] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:54:58 testing simple program... [ 34.476025] cgroup: Unknown subsys name 'net' [ 34.535149] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:54:56 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=00007fff586b9868 CR3=0000000018032000 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=2037353a34353a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037353a34353a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f0df220 RCX=0000000000000001 RDX=0000000000000000 RSI=ffffffff84497e37 RDI=ffff88800f0df22c RBP=0000000000000000 RSP=ffff88800f0df138 R8 =0000000000000001 R9 =ffff88800f0df198 R10=0000000000038001 R11=0000000000020cdb R12=ffff88800f0df220 R13=0000000000000000 R14=ffff8880182bd1c0 R15=ffff88801cd76980 RIP=ffffffff813ad49e RFL=00000213 [----A-C] 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 00007fcbbda58900 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=00007fcbbda37020 CR3=0000000019f5a000 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=00000000000000000000000000000000 XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000