syzkaller login: [ 64.503274] BUG: Bad rss-counter state mm:000000009ce288b7 type:MM_FILEPAGES val:33 [ 64.504928] BUG: Bad rss-counter state mm:000000009ce288b7 type:MM_ANONPAGES val:22 [ 64.674812] ================================================================== [ 64.675704] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 64.676625] Read of size 8 at addr ffff888019ea0310 by task sshd/221 [ 64.677393] [ 64.677614] CPU: 1 PID: 221 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 64.678807] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 64.679764] Call Trace: [ 64.680078] <TASK> [ 64.680358] dump_stack_lvl+0x91/0xf0 [ 64.680854] print_report+0xcc/0x620 [ 64.681333] ? __virt_addr_valid+0x102/0x340 [ 64.681899] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.682513] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.683126] kasan_report+0xbe/0xf0 [ 64.683594] ? vma_interval_tree_remove+0xc75/0xec0 [ 64.684206] vma_interval_tree_remove+0xc75/0xec0 [ 64.684799] vma_prepare+0xc54/0x11a0 [ 64.685302] __split_vma+0x5af/0x950 [ 64.685792] ? __pfx___split_vma+0x10/0x10 [ 64.686336] ? find_held_lock+0x2c/0x110 [ 64.686857] do_vmi_align_munmap+0x2ba/0x11f0 [ 64.687427] ? lock_is_held_type+0x9f/0x120 [ 64.687966] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 64.688571] ? mtree_range_walk+0x632/0x900 [ 64.689127] ? mas_walk+0x5c7/0x7c0 [ 64.689600] do_vmi_munmap+0x1f1/0x2b0 [ 64.690108] mmap_region+0x1f9/0x2660 [ 64.690589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 64.691095] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 64.691812] ? __pfx_lock_acquire+0x10/0x10 [ 64.692341] ? __pfx_mmap_region+0x10/0x10 [ 64.692867] ? security_mmap_addr+0x7d/0xa0 [ 64.693395] ? get_unmapped_area+0x1f5/0x3f0 [ 64.693956] do_mmap+0x854/0xf00 [ 64.694395] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.694881] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 64.695453] ksys_mmap_pgoff+0x3af/0x500 [ 64.695961] do_syscall_64+0x3f/0x90 [ 64.696437] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.697080] RIP: 0033:0x7fb065615d82 [ 64.697538] 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 [ 64.699673] RSP: 002b:00007ffe72db1468 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 64.700577] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb065615d82 [ 64.701428] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb064a4f000 [ 64.702291] RBP: 00007fb064a4f000 R08: 0000000000000009 R09: 0000000000001000 [ 64.703139] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558161c06ec0 [ 64.703989] R13: 00007ffe72db1480 R14: 00007ffe72db14b0 R15: 00007ffe72db1810 [ 64.704835] </TASK> [ 64.705126] [ 64.705343] Allocated by task 214: [ 64.705771] kasan_save_stack+0x22/0x50 [ 64.706286] kasan_set_track+0x25/0x30 [ 64.706777] __kasan_slab_alloc+0x59/0x70 [ 64.707308] kmem_cache_alloc+0x16b/0x370 [ 64.707822] vm_area_dup+0x20/0x160 [ 64.708271] __split_vma+0x170/0x950 [ 64.708734] split_vma+0xc6/0x110 [ 64.709165] mprotect_fixup+0x8d2/0xb30 [ 64.709661] do_mprotect_pkey+0x87e/0xd40 [ 64.710204] __x64_sys_mprotect+0x78/0xc0 [ 64.710726] do_syscall_64+0x3f/0x90 [ 64.711198] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.711831] [ 64.712045] Freed by task 214: [ 64.712434] kasan_save_stack+0x22/0x50 [ 64.712929] kasan_set_track+0x25/0x30 [ 64.713424] kasan_save_free_info+0x2b/0x50 [ 64.713955] __kasan_slab_free+0x10a/0x190 [ 64.714485] kmem_cache_free+0x10d/0x4d0 [ 64.714986] rcu_core+0x8c8/0x2860 [ 64.715426] __do_softirq+0x1b7/0x7d4 [ 64.715897] [ 64.716112] Last potentially related work creation: [ 64.716705] kasan_save_stack+0x22/0x50 [ 64.717208] __kasan_record_aux_stack+0x8e/0xa0 [ 64.717776] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.718629] remove_vma+0x139/0x170 [ 64.719223] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.719999] do_vmi_munmap+0x1f1/0x2b0 [ 64.720596] __vm_munmap+0x138/0x3a0 [ 64.721181] __x64_sys_munmap+0x59/0x80 [ 64.721804] do_syscall_64+0x3f/0x90 [ 64.722442] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.723164] [ 64.723382] Second to last potentially related work creation: [ 64.724079] kasan_save_stack+0x22/0x50 [ 64.724588] __kasan_record_aux_stack+0x8e/0xa0 [ 64.725186] __call_rcu_common.constprop.0+0x6a/0xb90 [ 64.725837] remove_vma+0x139/0x170 [ 64.726305] do_vmi_align_munmap+0xd4a/0x11f0 [ 64.726864] do_vmi_munmap+0x1f1/0x2b0 [ 64.727373] mmap_region+0x1f9/0x2660 [ 64.727857] do_mmap+0x854/0xf00 [ 64.728307] vm_mmap_pgoff+0x1a6/0x3a0 [ 64.728796] ksys_mmap_pgoff+0x3af/0x500 [ 64.729316] do_syscall_64+0x3f/0x90 [ 64.729786] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 64.730455] [ 64.730673] The buggy address belongs to the object at ffff888019ea02b8 [ 64.730673] which belongs to the cache vm_area_struct of size 168 [ 64.732181] The buggy address is located 88 bytes inside of [ 64.732181] freed 168-byte region [ffff888019ea02b8, ffff888019ea0360) [ 64.733591] [ 64.733828] The buggy address belongs to the physical page: [ 64.734500] page:00000000b1a8bd87 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19ea0 [ 64.735643] memcg:ffff888019ea2101 [ 64.736095] flags: 0x100000000000200(slab|node=0|zone=1) [ 64.736733] page_type: 0xffffffff() [ 64.737201] raw: 0100000000000200 ffff88800879fc80 ffffea00006066c0 000000000000000a [ 64.738150] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019ea2101 [ 64.739075] page dumped because: kasan: bad access detected [ 64.739732] [ 64.739980] Memory state around the buggy address: [ 64.740560] ffff888019ea0200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 64.741428] ffff888019ea0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 64.742335] >ffff888019ea0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 64.743205] ^ [ 64.743675] ffff888019ea0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 64.744563] ffff888019ea0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 64.745426] ================================================================== [ 64.746460] Disabling lock debugging due to kernel taint [ 66.637189] BUG: Bad rss-counter state mm:0000000013adf223 type:MM_FILEPAGES val:33 [ 66.638011] BUG: Bad rss-counter state mm:0000000013adf223 type:MM_ANONPAGES val:22 [ 67.155964] BUG: Bad rss-counter state mm:0000000060cecd5b type:MM_FILEPAGES val:33 [ 67.156955] BUG: Bad rss-counter state mm:0000000060cecd5b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:59565' (ECDSA) to the list of known hosts. 2023/06/19 21:02:43 fuzzer started 2023/06/19 21:02:44 dialing manager at localhost:44161 2023/06/19 21:02:44 checking machine... 2023/06/19 21:02:44 checking revisions... [ 67.870914] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:02:44 testing simple program... [ 67.919703] cgroup: Unknown subsys name 'net' [ 67.962978] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:02:10 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85d3d010 RCX=ffffffff812d869a RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffed10033f8f16 RSP=ffff888019fc78a0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6cb2 R12=ffffffff8560b640 R13=ffffffff814c84f5 R14=ffffffff85652988 R15=ffff8880099028d0 RIP=ffffffff812d8a03 RFL=00000246 [---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 00007f4f409c8900 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=00007f4f40f800b0 CR3=000000000c462000 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=25252525252525252525252525252525 XMM01=00000000000000000000000000000000 XMM02=00000000000000000000000000000000 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=707465675f6c697475646f6d6d61705f 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=00007ffe85dd7948 CR3=0000000005482000 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=00007f17fddb65100000558610f00790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000