syzkaller login: [ 30.261506] BUG: Bad rss-counter state mm:000000001bbade8a type:MM_FILEPAGES val:33 [ 30.262751] BUG: Bad rss-counter state mm:000000001bbade8a type:MM_ANONPAGES val:22 [ 30.394930] ================================================================== [ 30.395942] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.397082] Read of size 8 at addr ffff888015c9d310 by task sshd/221 [ 30.397945] [ 30.398195] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.399187] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.400295] Call Trace: [ 30.400651] [ 30.400986] dump_stack_lvl+0x91/0xf0 [ 30.401544] print_report+0xcc/0x620 [ 30.402088] ? __virt_addr_valid+0x102/0x340 [ 30.402718] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.403414] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.404110] kasan_report+0xbe/0xf0 [ 30.404647] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.405364] vma_interval_tree_remove+0xc75/0xec0 [ 30.406045] vma_prepare+0xc54/0x11a0 [ 30.406589] __split_vma+0x5af/0x950 [ 30.407114] ? __pfx___split_vma+0x10/0x10 [ 30.407714] ? find_held_lock+0x2c/0x110 [ 30.408293] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.408962] ? lock_is_held_type+0x9f/0x120 [ 30.409574] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.410263] ? mtree_range_walk+0x632/0x900 [ 30.410885] ? mas_walk+0x5c7/0x7c0 [ 30.411432] do_vmi_munmap+0x1f1/0x2b0 [ 30.411980] mmap_region+0x1f9/0x2660 [ 30.412527] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.413113] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.413930] ? __pfx_lock_acquire+0x10/0x10 [ 30.414528] ? __pfx_mmap_region+0x10/0x10 [ 30.415135] ? security_mmap_addr+0x7d/0xa0 [ 30.415740] ? get_unmapped_area+0x1f5/0x3f0 [ 30.416365] do_mmap+0x854/0xf00 [ 30.416885] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.417457] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.418113] ksys_mmap_pgoff+0x3af/0x500 [ 30.418712] do_syscall_64+0x3f/0x90 [ 30.419277] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.420019] RIP: 0033:0x7f20ab97bd82 [ 30.420552] 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 [ 30.423063] RSP: 002b:00007ffed2fe29c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.424124] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20ab97bd82 [ 30.425121] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20aadb5000 [ 30.426136] RBP: 00007f20aadb5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.427122] R10: 0000000000000812 R11: 0000000000000206 R12: 000056104690ef70 [ 30.428115] R13: 00007ffed2fe29e0 R14: 00007ffed2fe2a10 R15: 00007ffed2fe2d70 [ 30.429163] [ 30.429505] [ 30.429762] Allocated by task 214: [ 30.430272] kasan_save_stack+0x22/0x50 [ 30.430863] kasan_set_track+0x25/0x30 [ 30.431451] __kasan_slab_alloc+0x59/0x70 [ 30.432071] kmem_cache_alloc+0x16b/0x370 [ 30.432674] vm_area_dup+0x20/0x160 [ 30.433224] __split_vma+0x170/0x950 [ 30.433782] split_vma+0xc6/0x110 [ 30.434292] mprotect_fixup+0x8d2/0xb30 [ 30.434879] do_mprotect_pkey+0x87e/0xd40 [ 30.435487] __x64_sys_mprotect+0x78/0xc0 [ 30.436115] do_syscall_64+0x3f/0x90 [ 30.436658] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.437437] [ 30.437682] Freed by task 211: [ 30.438142] kasan_save_stack+0x22/0x50 [ 30.438740] kasan_set_track+0x25/0x30 [ 30.439330] kasan_save_free_info+0x2b/0x50 [ 30.439933] __kasan_slab_free+0x10a/0x190 [ 30.440544] kmem_cache_free+0x10d/0x4d0 [ 30.441140] rcu_core+0x8c8/0x2860 [ 30.441636] __do_softirq+0x1b7/0x7d4 [ 30.442184] [ 30.442426] Last potentially related work creation: [ 30.443084] kasan_save_stack+0x22/0x50 [ 30.443673] __kasan_record_aux_stack+0x8e/0xa0 [ 30.444357] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.445119] remove_vma+0x139/0x170 [ 30.445649] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.446312] do_vmi_munmap+0x1f1/0x2b0 [ 30.446884] __vm_munmap+0x138/0x3a0 [ 30.447434] __x64_sys_munmap+0x59/0x80 [ 30.448013] do_syscall_64+0x3f/0x90 [ 30.448572] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.449339] [ 30.449588] The buggy address belongs to the object at ffff888015c9d2b8 [ 30.449588] which belongs to the cache vm_area_struct of size 168 [ 30.451325] The buggy address is located 88 bytes inside of [ 30.451325] freed 168-byte region [ffff888015c9d2b8, ffff888015c9d360) [ 30.453333] [ 30.453650] The buggy address belongs to the physical page: [ 30.454589] page:000000002918149e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15c9d [ 30.456265] memcg:ffff88800ca76401 [ 30.456956] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.457951] page_type: 0xffffffff() [ 30.458653] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.460097] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca76401 [ 30.461505] page dumped because: kasan: bad access detected [ 30.462533] [ 30.462872] Memory state around the buggy address: [ 30.463756] ffff888015c9d200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 30.465040] ffff888015c9d280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 30.466345] >ffff888015c9d300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 30.467472] ^ [ 30.468102] ffff888015c9d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.469244] ffff888015c9d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.470279] ================================================================== [ 30.471597] Disabling lock debugging due to kernel taint [ 32.415263] BUG: Bad rss-counter state mm:000000008df6aa6e type:MM_FILEPAGES val:33 [ 32.416265] BUG: Bad rss-counter state mm:000000008df6aa6e type:MM_ANONPAGES val:22 [ 32.888522] BUG: Bad rss-counter state mm:000000004e236738 type:MM_FILEPAGES val:33 [ 32.890578] BUG: Bad rss-counter state mm:000000004e236738 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:24055' (ECDSA) to the list of known hosts. 2023/06/20 15:56:43 fuzzer started 2023/06/20 15:56:43 dialing manager at localhost:36067 2023/06/20 15:56:43 checking machine... 2023/06/20 15:56:43 checking revisions... [ 33.627651] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:56:44 testing simple program... [ 33.680761] cgroup: Unknown subsys name 'net' [ 33.750675] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:56:43 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888016cc7d80 RCX=0000000000000000 RDX=ffff888016cc7c64 RSI=0000000000000000 RDI=ffff88801acc5640 RBP=0000000000000014 RSP=ffff888016cc7ba8 R8 =0000000000000004 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=00000000ffffffa4 R13=ffff88801acc5640 R14=0000000000000000 R15=ffff888016cc7c64 RIP=ffffffff814c086b 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 00007f27d7ba7900 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=00007f27d815e618 CR3=00000000167ca000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 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=00007f30ca2e9970 CR3=000000000d57a000 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=67b4f5ab3dbc6ba92e4e0701fcf176f3 XMM02=000000000011fe08ec2efd57dc4c00df XMM03=0000000000122ca08748df1e4514e630 XMM04=b0df8fa8c564df4700000000000ae988 XMM05=e4cb8bb95a7664b60000000000132e38 XMM06=c291bd5c70af25b90000000000132cc0 XMM07=e042d86d42eb936e0000000000123688 XMM08=8748df1e4514e630000000000011fe68 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000