syzkaller login: [ 28.968613] BUG: Bad rss-counter state mm:00000000607e7c78 type:MM_FILEPAGES val:33 [ 28.969800] BUG: Bad rss-counter state mm:00000000607e7c78 type:MM_ANONPAGES val:22 [ 29.015471] ================================================================== [ 29.016776] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.018213] Read of size 8 at addr ffff888016c576b0 by task sshd/222 [ 29.019331] [ 29.019684] CPU: 1 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.020737] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.022041] Call Trace: [ 29.022525] [ 29.022881] dump_stack_lvl+0x91/0xf0 [ 29.023570] print_report+0xcc/0x620 [ 29.024276] ? __virt_addr_valid+0x102/0x340 [ 29.025013] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.025880] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.026646] kasan_report+0xbe/0xf0 [ 29.027143] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.027803] vma_interval_tree_remove+0xc75/0xec0 [ 29.028442] vma_prepare+0xc54/0x11a0 [ 29.028937] __split_vma+0x5af/0x950 [ 29.029446] ? __pfx___split_vma+0x10/0x10 [ 29.030083] ? find_held_lock+0x2c/0x110 [ 29.030745] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.031344] ? lock_is_held_type+0x9f/0x120 [ 29.031896] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.032497] ? mtree_range_walk+0x632/0x900 [ 29.033047] ? mas_walk+0x5c7/0x7c0 [ 29.033525] do_vmi_munmap+0x1f1/0x2b0 [ 29.034022] mmap_region+0x1f9/0x2660 [ 29.034526] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.035038] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.035796] ? __pfx_lock_acquire+0x10/0x10 [ 29.036328] ? __pfx_mmap_region+0x10/0x10 [ 29.036862] ? security_mmap_addr+0x7d/0xa0 [ 29.037396] ? get_unmapped_area+0x1f5/0x3f0 [ 29.037946] do_mmap+0x854/0xf00 [ 29.038393] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.038909] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.039491] ksys_mmap_pgoff+0x3af/0x500 [ 29.040016] do_syscall_64+0x3f/0x90 [ 29.040539] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.041192] RIP: 0033:0x7f050ffc6d82 [ 29.041669] 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 [ 29.043899] RSP: 002b:00007ffe8ae28b88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.044828] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f050ffc6d82 [ 29.045702] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f050f400000 [ 29.046573] RBP: 00007f050f400000 R08: 0000000000000009 R09: 0000000000001000 [ 29.047438] R10: 0000000000000812 R11: 0000000000000206 R12: 000056143f5e6f70 [ 29.048299] R13: 00007ffe8ae28ba0 R14: 00007ffe8ae28bd0 R15: 00007ffe8ae28f30 [ 29.049179] [ 29.049476] [ 29.049692] Allocated by task 214: [ 29.050119] kasan_save_stack+0x22/0x50 [ 29.050641] kasan_set_track+0x25/0x30 [ 29.051139] __kasan_slab_alloc+0x59/0x70 [ 29.051663] kmem_cache_alloc+0x16b/0x370 [ 29.052179] vm_area_dup+0x20/0x160 [ 29.052654] __split_vma+0x170/0x950 [ 29.053154] split_vma+0xc6/0x110 [ 29.053631] mprotect_fixup+0x8d2/0xb30 [ 29.054136] do_mprotect_pkey+0x87e/0xd40 [ 29.054682] __x64_sys_mprotect+0x78/0xc0 [ 29.055210] do_syscall_64+0x3f/0x90 [ 29.055691] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.056334] [ 29.056550] Freed by task 214: [ 29.057038] kasan_save_stack+0x22/0x50 [ 29.057546] kasan_set_track+0x25/0x30 [ 29.058044] kasan_save_free_info+0x2b/0x50 [ 29.058592] __kasan_slab_free+0x10a/0x190 [ 29.059131] kmem_cache_free+0x10d/0x4d0 [ 29.059680] rcu_core+0x8c8/0x2860 [ 29.060119] __do_softirq+0x1b7/0x7d4 [ 29.060598] [ 29.060811] Last potentially related work creation: [ 29.061404] kasan_save_stack+0x22/0x50 [ 29.061904] __kasan_record_aux_stack+0x8e/0xa0 [ 29.062486] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.063129] remove_vma+0x139/0x170 [ 29.063576] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.064131] do_vmi_munmap+0x1f1/0x2b0 [ 29.064619] __vm_munmap+0x138/0x3a0 [ 29.065086] __x64_sys_munmap+0x59/0x80 [ 29.065595] do_syscall_64+0x3f/0x90 [ 29.066067] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.066732] [ 29.066953] The buggy address belongs to the object at ffff888016c57658 [ 29.066953] which belongs to the cache vm_area_struct of size 168 [ 29.068441] The buggy address is located 88 bytes inside of [ 29.068441] freed 168-byte region [ffff888016c57658, ffff888016c57700) [ 29.069847] [ 29.070062] The buggy address belongs to the physical page: [ 29.070744] page:0000000019963716 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16c57 [ 29.071837] memcg:ffff88800c5e3001 [ 29.072259] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.072906] page_type: 0xffffffff() [ 29.073359] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.074274] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c5e3001 [ 29.075197] page dumped because: kasan: bad access detected [ 29.075851] [ 29.076066] Memory state around the buggy address: [ 29.076650] ffff888016c57580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.077509] ffff888016c57600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 29.078374] >ffff888016c57680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.079243] ^ [ 29.079819] ffff888016c57700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 29.080681] ffff888016c57780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 29.081535] ================================================================== [ 29.082514] Disabling lock debugging due to kernel taint [ 31.273171] BUG: Bad rss-counter state mm:0000000096665316 type:MM_FILEPAGES val:33 [ 31.274152] BUG: Bad rss-counter state mm:0000000096665316 type:MM_ANONPAGES val:22 [ 31.746460] BUG: Bad rss-counter state mm:0000000038143fe5 type:MM_FILEPAGES val:33 [ 31.747482] BUG: Bad rss-counter state mm:0000000038143fe5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11855' (ECDSA) to the list of known hosts. 2023/06/20 14:26:30 fuzzer started 2023/06/20 14:26:31 dialing manager at localhost:36067 2023/06/20 14:26:31 checking machine... 2023/06/20 14:26:31 checking revisions... [ 32.452789] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:26:31 testing simple program... [ 32.495605] cgroup: Unknown subsys name 'net' [ 32.533961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:26:30 Registers: info registers vcpu 0 RAX=ffff88801ceb0001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff88801ceaf901 RSI=ffff88801ceaf9b0 RDI=ffff88801ceaf890 RBP=ffff88801ceaf8d8 RSP=ffff88801ceaf7f8 R8 =ffffffff860d825a R9 =ffff88801ceaf8c0 R10=0000000000038001 R11=0000000000010b8d R12=ffff88801ceaf8e0 R13=ffff88801cea8000 R14=ffff88801ceaf9b8 R15=ffff88801ceaf880 RIP=ffffffff811304d1 RFL=00000292 [--S-A--] 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 00007fa95d7d9900 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=000055f2d79fd818 CR3=000000000cb5e000 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=00000000000000000000000000000000 XMM01=ff0000000000ffff0000000000ff0000 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=00007f3f51a01338 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=00007f3f51eef51000005642077a3790 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