syzkaller login: [ 30.525433] BUG: Bad rss-counter state mm:0000000089950325 type:MM_FILEPAGES val:33 [ 30.526895] BUG: Bad rss-counter state mm:0000000089950325 type:MM_ANONPAGES val:22 [ 30.635713] ================================================================== [ 30.636834] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.638141] Read of size 8 at addr ffff8880164696b0 by task sshd/221 [ 30.638972] [ 30.639192] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.640082] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.641103] Call Trace: [ 30.641432] [ 30.641735] dump_stack_lvl+0x91/0xf0 [ 30.642244] print_report+0xcc/0x620 [ 30.642737] ? __virt_addr_valid+0x102/0x340 [ 30.643306] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.643956] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.644596] kasan_report+0xbe/0xf0 [ 30.645088] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.645720] vma_interval_tree_remove+0xc75/0xec0 [ 30.646320] vma_prepare+0xc54/0x11a0 [ 30.646797] __split_vma+0x5af/0x950 [ 30.647264] ? __pfx___split_vma+0x10/0x10 [ 30.647792] ? find_held_lock+0x2c/0x110 [ 30.648323] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.648893] ? lock_is_held_type+0x9f/0x120 [ 30.649449] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.650050] ? mtree_range_walk+0x632/0x900 [ 30.650604] ? mas_walk+0x5c7/0x7c0 [ 30.651080] do_vmi_munmap+0x1f1/0x2b0 [ 30.651570] mmap_region+0x1f9/0x2660 [ 30.652059] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.652562] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.653278] ? __pfx_lock_acquire+0x10/0x10 [ 30.653818] ? __pfx_mmap_region+0x10/0x10 [ 30.654345] ? security_mmap_addr+0x7d/0xa0 [ 30.654869] ? get_unmapped_area+0x1f5/0x3f0 [ 30.655413] do_mmap+0x854/0xf00 [ 30.655852] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.656343] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.656896] ksys_mmap_pgoff+0x3af/0x500 [ 30.657423] do_syscall_64+0x3f/0x90 [ 30.657897] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.658538] RIP: 0033:0x7f2e2523dd82 [ 30.658987] 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 [ 30.661112] RSP: 002b:00007ffcf4ee93e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.661999] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2e2523dd82 [ 30.662844] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2e24677000 [ 30.663686] RBP: 00007f2e24677000 R08: 0000000000000009 R09: 0000000000001000 [ 30.664522] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ef0c9b8f70 [ 30.665375] R13: 00007ffcf4ee9400 R14: 00007ffcf4ee9430 R15: 00007ffcf4ee9790 [ 30.666218] [ 30.666511] [ 30.666723] Allocated by task 214: [ 30.667151] kasan_save_stack+0x22/0x50 [ 30.667652] kasan_set_track+0x25/0x30 [ 30.668136] __kasan_slab_alloc+0x59/0x70 [ 30.668656] kmem_cache_alloc+0x16b/0x370 [ 30.669173] vm_area_dup+0x20/0x160 [ 30.669629] __split_vma+0x170/0x950 [ 30.670085] split_vma+0xc6/0x110 [ 30.670523] mprotect_fixup+0x8d2/0xb30 [ 30.671019] do_mprotect_pkey+0x87e/0xd40 [ 30.671538] __x64_sys_mprotect+0x78/0xc0 [ 30.672055] do_syscall_64+0x3f/0x90 [ 30.672538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.673190] [ 30.673407] Freed by task 214: [ 30.673798] kasan_save_stack+0x22/0x50 [ 30.674292] kasan_set_track+0x25/0x30 [ 30.674782] kasan_save_free_info+0x2b/0x50 [ 30.675302] __kasan_slab_free+0x10a/0x190 [ 30.675828] kmem_cache_free+0x10d/0x4d0 [ 30.676331] rcu_core+0x8c8/0x2860 [ 30.676770] __do_softirq+0x1b7/0x7d4 [ 30.677258] [ 30.677471] Last potentially related work creation: [ 30.678052] kasan_save_stack+0x22/0x50 [ 30.678550] __kasan_record_aux_stack+0x8e/0xa0 [ 30.679204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.679849] remove_vma+0x139/0x170 [ 30.680297] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.680848] do_vmi_munmap+0x1f1/0x2b0 [ 30.681339] __vm_munmap+0x138/0x3a0 [ 30.681809] __x64_sys_munmap+0x59/0x80 [ 30.682295] do_syscall_64+0x3f/0x90 [ 30.682763] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.683398] [ 30.683617] The buggy address belongs to the object at ffff888016469658 [ 30.683617] which belongs to the cache vm_area_struct of size 168 [ 30.685081] The buggy address is located 88 bytes inside of [ 30.685081] freed 168-byte region [ffff888016469658, ffff888016469700) [ 30.686472] [ 30.686693] The buggy address belongs to the physical page: [ 30.687348] page:0000000004fc90d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16469 [ 30.688443] memcg:ffff88800fb98201 [ 30.688871] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.689531] page_type: 0xffffffff() [ 30.689977] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.690884] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fb98201 [ 30.691784] page dumped because: kasan: bad access detected [ 30.692441] [ 30.692653] Memory state around the buggy address: [ 30.693234] ffff888016469580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.694083] ffff888016469600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.694932] >ffff888016469680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.695779] ^ [ 30.696368] ffff888016469700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.697228] ffff888016469780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.698065] ================================================================== [ 30.698979] Disabling lock debugging due to kernel taint [ 33.165092] BUG: Bad rss-counter state mm:00000000278a3a4a type:MM_FILEPAGES val:33 [ 33.165644] BUG: Bad rss-counter state mm:00000000278a3a4a type:MM_ANONPAGES val:22 [ 33.556163] BUG: Bad rss-counter state mm:00000000d569d91a type:MM_FILEPAGES val:33 [ 33.556929] BUG: Bad rss-counter state mm:00000000d569d91a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26573' (ECDSA) to the list of known hosts. 2023/06/19 19:44:27 fuzzer started 2023/06/19 19:44:27 dialing manager at localhost:44161 2023/06/19 19:44:27 checking machine... 2023/06/19 19:44:27 checking revisions... [ 34.241790] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:44:27 testing simple program... [ 34.295042] cgroup: Unknown subsys name 'net' [ 34.336516] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:44:27 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=00007f8e4a112a40 CR3=000000000da0c000 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=2037323a34343a3931203931206e754a XMM01=73732878696e755f6d6170203a5d3033 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3033325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036323a34343a3931203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff860d68f6 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff888018d37730 RSP=ffff888018d37668 R8 =ffffffff860d68fa R9 =ffff888018d37718 R10=0000000000038001 R11=0000000000010b7e R12=ffff888018d37738 R13=ffff888018d37720 R14=ffff888018d37810 R15=ffff888018d376d8 RIP=ffffffff81131171 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 =0018 0000000000000000 ffffffff 00c09300 DPL=0 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f9d0f2d8900 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=00007f9d0f291008 CR3=000000000f948000 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