syzkaller login: [ 33.031552] BUG: Bad rss-counter state mm:00000000beb05499 type:MM_FILEPAGES val:33 [ 33.033192] BUG: Bad rss-counter state mm:00000000beb05499 type:MM_ANONPAGES val:22 [ 33.198912] ================================================================== [ 33.200027] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.201138] Read of size 8 at addr ffff888016db3228 by task sshd/220 [ 33.202240] [ 33.202502] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.203379] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.204380] Call Trace: [ 33.204702] [ 33.204992] dump_stack_lvl+0x91/0xf0 [ 33.205489] print_report+0xcc/0x620 [ 33.205974] ? __virt_addr_valid+0x102/0x340 [ 33.206547] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.207166] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.207787] kasan_report+0xbe/0xf0 [ 33.208266] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.208894] vma_interval_tree_remove+0xc75/0xec0 [ 33.209496] vma_prepare+0xc54/0x11a0 [ 33.209974] __split_vma+0x5af/0x950 [ 33.210456] ? __pfx___split_vma+0x10/0x10 [ 33.210996] ? find_held_lock+0x2c/0x110 [ 33.211517] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.212098] ? lock_is_held_type+0x9f/0x120 [ 33.212651] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.213270] ? mtree_range_walk+0x632/0x900 [ 33.213829] ? mas_walk+0x5c7/0x7c0 [ 33.214335] do_vmi_munmap+0x1f1/0x2b0 [ 33.214846] mmap_region+0x1f9/0x2660 [ 33.215328] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.215851] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.216572] ? __pfx_lock_acquire+0x10/0x10 [ 33.217111] ? __pfx_mmap_region+0x10/0x10 [ 33.217654] ? security_mmap_addr+0x7d/0xa0 [ 33.218202] ? get_unmapped_area+0x1f5/0x3f0 [ 33.218757] do_mmap+0x854/0xf00 [ 33.219201] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.219705] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.220278] ksys_mmap_pgoff+0x3af/0x500 [ 33.220800] do_syscall_64+0x3f/0x90 [ 33.221286] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.221941] RIP: 0033:0x7f14054f5d82 [ 33.222422] 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 [ 33.224578] RSP: 002b:00007fff1e37e3e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.225494] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f14054f5d82 [ 33.226371] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f140492f000 [ 33.227247] RBP: 00007f140492f000 R08: 0000000000000009 R09: 0000000000001000 [ 33.228128] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a95a028d90 [ 33.229004] R13: 00007fff1e37e400 R14: 00007fff1e37e430 R15: 00007fff1e37e790 [ 33.229877] [ 33.230188] [ 33.230408] Allocated by task 213: [ 33.230843] kasan_save_stack+0x22/0x50 [ 33.231353] kasan_set_track+0x25/0x30 [ 33.231855] __kasan_slab_alloc+0x59/0x70 [ 33.232389] kmem_cache_alloc+0x16b/0x370 [ 33.232917] vm_area_dup+0x20/0x160 [ 33.233381] __split_vma+0x170/0x950 [ 33.233860] split_vma+0xc6/0x110 [ 33.234319] mprotect_fixup+0x8d2/0xb30 [ 33.234836] do_mprotect_pkey+0x87e/0xd40 [ 33.235365] __x64_sys_mprotect+0x78/0xc0 [ 33.235885] do_syscall_64+0x3f/0x90 [ 33.236370] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.237016] [ 33.237229] Freed by task 213: [ 33.237634] kasan_save_stack+0x22/0x50 [ 33.238145] kasan_set_track+0x25/0x30 [ 33.238644] kasan_save_free_info+0x2b/0x50 [ 33.239178] __kasan_slab_free+0x10a/0x190 [ 33.239723] kmem_cache_free+0x10d/0x4d0 [ 33.240241] rcu_core+0x8c8/0x2860 [ 33.240697] __do_softirq+0x1b7/0x7d4 [ 33.241174] [ 33.241388] Last potentially related work creation: [ 33.241990] kasan_save_stack+0x22/0x50 [ 33.242530] __kasan_record_aux_stack+0x8e/0xa0 [ 33.243180] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.243845] remove_vma+0x139/0x170 [ 33.244311] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.244893] do_vmi_munmap+0x1f1/0x2b0 [ 33.245384] __vm_munmap+0x138/0x3a0 [ 33.245866] __x64_sys_munmap+0x59/0x80 [ 33.246380] do_syscall_64+0x3f/0x90 [ 33.246871] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.247513] [ 33.247731] The buggy address belongs to the object at ffff888016db31d0 [ 33.247731] which belongs to the cache vm_area_struct of size 168 [ 33.249195] The buggy address is located 88 bytes inside of [ 33.249195] freed 168-byte region [ffff888016db31d0, ffff888016db3278) [ 33.250629] [ 33.250843] The buggy address belongs to the physical page: [ 33.251500] page:00000000d8f0e2f9 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16db3 [ 33.252594] memcg:ffff88800de11701 [ 33.253023] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.253694] page_type: 0xffffffff() [ 33.254164] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.255081] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de11701 [ 33.256002] page dumped because: kasan: bad access detected [ 33.256667] [ 33.256884] Memory state around the buggy address: [ 33.257458] ffff888016db3100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.258324] ffff888016db3180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 33.259175] >ffff888016db3200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 33.260021] ^ [ 33.260575] ffff888016db3280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 33.261427] ffff888016db3300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 33.262314] ================================================================== [ 33.263257] Disabling lock debugging due to kernel taint [ 35.395868] BUG: Bad rss-counter state mm:0000000094b535d3 type:MM_FILEPAGES val:33 [ 35.397107] BUG: Bad rss-counter state mm:0000000094b535d3 type:MM_ANONPAGES val:22 [ 35.894083] BUG: Bad rss-counter state mm:000000006badfbe4 type:MM_FILEPAGES val:33 [ 35.895282] BUG: Bad rss-counter state mm:000000006badfbe4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18475' (ECDSA) to the list of known hosts. 2023/06/19 15:17:20 fuzzer started 2023/06/19 15:17:20 dialing manager at localhost:44161 2023/06/19 15:17:20 checking machine... 2023/06/19 15:17:20 checking revisions... [ 36.556254] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:17:20 testing simple program... [ 36.607298] cgroup: Unknown subsys name 'net' [ 36.654848] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:17:18 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=00007ffe7336dd18 CR3=0000000005482000 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=00007f813787751000005565ed4bf790 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 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=ffff888008c58400 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=00007f36feff0650 CR3=000000000f212000 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=2030323a37313a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a37313a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000