syzkaller login: [ 30.479482] BUG: Bad rss-counter state mm:00000000972f7883 type:MM_FILEPAGES val:33 [ 30.480478] BUG: Bad rss-counter state mm:00000000972f7883 type:MM_ANONPAGES val:22 [ 30.648160] ================================================================== [ 30.649284] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.650443] Read of size 8 at addr ffff888016ad73f8 by task sshd/221 [ 30.651495] [ 30.651736] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.652595] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.653570] Call Trace: [ 30.653890] [ 30.654175] dump_stack_lvl+0x91/0xf0 [ 30.654683] print_report+0xcc/0x620 [ 30.655164] ? __virt_addr_valid+0x102/0x340 [ 30.655713] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656337] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.656956] kasan_report+0xbe/0xf0 [ 30.657431] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.658049] vma_interval_tree_remove+0xc75/0xec0 [ 30.658667] vma_prepare+0xc54/0x11a0 [ 30.659156] __split_vma+0x5af/0x950 [ 30.659644] ? __pfx___split_vma+0x10/0x10 [ 30.660188] ? find_held_lock+0x2c/0x110 [ 30.660716] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.661277] ? lock_is_held_type+0x9f/0x120 [ 30.661825] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.662453] ? mtree_range_walk+0x632/0x900 [ 30.663005] ? mas_walk+0x5c7/0x7c0 [ 30.663484] do_vmi_munmap+0x1f1/0x2b0 [ 30.663979] mmap_region+0x1f9/0x2660 [ 30.664463] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.665000] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.665732] ? __pfx_lock_acquire+0x10/0x10 [ 30.666266] ? __pfx_mmap_region+0x10/0x10 [ 30.666802] ? security_mmap_addr+0x7d/0xa0 [ 30.667337] ? get_unmapped_area+0x1f5/0x3f0 [ 30.667891] do_mmap+0x854/0xf00 [ 30.668334] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.668834] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.669397] ksys_mmap_pgoff+0x3af/0x500 [ 30.669913] do_syscall_64+0x3f/0x90 [ 30.670410] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.671057] RIP: 0033:0x7f175493bd82 [ 30.671510] 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 [ 30.673637] RSP: 002b:00007ffdd894eb78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.674555] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f175493bd82 [ 30.675405] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1753d75000 [ 30.676247] RBP: 00007f1753d75000 R08: 0000000000000009 R09: 0000000000001000 [ 30.677092] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d687eb5ec0 [ 30.677943] R13: 00007ffdd894eb90 R14: 00007ffdd894ebc0 R15: 00007ffdd894ef20 [ 30.678862] [ 30.679156] [ 30.679374] Allocated by task 214: [ 30.679807] kasan_save_stack+0x22/0x50 [ 30.680319] kasan_set_track+0x25/0x30 [ 30.680822] __kasan_slab_alloc+0x59/0x70 [ 30.681344] kmem_cache_alloc+0x16b/0x370 [ 30.681872] vm_area_dup+0x20/0x160 [ 30.682334] __split_vma+0x170/0x950 [ 30.682808] split_vma+0xc6/0x110 [ 30.683244] mprotect_fixup+0x8d2/0xb30 [ 30.683753] do_mprotect_pkey+0x87e/0xd40 [ 30.684278] __x64_sys_mprotect+0x78/0xc0 [ 30.684810] do_syscall_64+0x3f/0x90 [ 30.685291] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.685944] [ 30.686158] Freed by task 19: [ 30.686554] kasan_save_stack+0x22/0x50 [ 30.687062] kasan_set_track+0x25/0x30 [ 30.687562] kasan_save_free_info+0x2b/0x50 [ 30.688101] __kasan_slab_free+0x10a/0x190 [ 30.688645] kmem_cache_free+0x10d/0x4d0 [ 30.689150] rcu_core+0x8c8/0x2860 [ 30.689592] __do_softirq+0x1b7/0x7d4 [ 30.690084] [ 30.690302] Last potentially related work creation: [ 30.690907] kasan_save_stack+0x22/0x50 [ 30.691407] __kasan_record_aux_stack+0x8e/0xa0 [ 30.692064] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.692706] remove_vma+0x139/0x170 [ 30.693158] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.693716] do_vmi_munmap+0x1f1/0x2b0 [ 30.694207] __vm_munmap+0x138/0x3a0 [ 30.694684] __x64_sys_munmap+0x59/0x80 [ 30.695176] do_syscall_64+0x3f/0x90 [ 30.695662] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.696303] [ 30.696520] The buggy address belongs to the object at ffff888016ad73a0 [ 30.696520] which belongs to the cache vm_area_struct of size 168 [ 30.697991] The buggy address is located 88 bytes inside of [ 30.697991] freed 168-byte region [ffff888016ad73a0, ffff888016ad7448) [ 30.699404] [ 30.699623] The buggy address belongs to the physical page: [ 30.700282] page:00000000759b64c2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16ad7 [ 30.701372] memcg:ffff888009519e01 [ 30.701797] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.702457] page_type: 0xffffffff() [ 30.702914] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.703831] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009519e01 [ 30.704739] page dumped because: kasan: bad access detected [ 30.705396] [ 30.705614] Memory state around the buggy address: [ 30.706200] ffff888016ad7280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.707066] ffff888016ad7300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.707925] >ffff888016ad7380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.708819] ^ [ 30.709663] ffff888016ad7400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.710548] ffff888016ad7480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.711400] ================================================================== [ 30.712322] Disabling lock debugging due to kernel taint [ 32.696218] BUG: Bad rss-counter state mm:000000008293600f type:MM_FILEPAGES val:33 [ 32.697439] BUG: Bad rss-counter state mm:000000008293600f type:MM_ANONPAGES val:22 [ 33.197517] BUG: Bad rss-counter state mm:00000000ca939319 type:MM_FILEPAGES val:33 [ 33.198752] BUG: Bad rss-counter state mm:00000000ca939319 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:47049' (ECDSA) to the list of known hosts. 2023/06/20 22:23:02 fuzzer started 2023/06/20 22:23:02 dialing manager at localhost:36067 2023/06/20 22:23:02 checking machine... 2023/06/20 22:23:02 checking revisions... [ 33.788144] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:23:02 testing simple program... [ 33.838022] cgroup: Unknown subsys name 'net' [ 33.878875] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:23:02 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007f904ca527d0 CR3=000000000e362000 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=2032303a33323a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031303a33323a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=ffff88800f750000 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffff88800f7503f4 RBP=ffff88800f750000 RSP=ffff88806cf09dd8 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=00000000000b6a61 R12=ffff888008fae500 R13=ffffea000063a600 R14=ffffffff818d9c06 R15=ffff888008f25b00 RIP=ffffffff8135bdea RFL=00000217 [----APC] 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 00007fee78035900 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=00007fee77ffa008 CR3=0000000015bf2000 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