syzkaller login: [ 115.966659] BUG: Bad rss-counter state mm:00000000019cd4e9 type:MM_FILEPAGES val:33 [ 115.967804] BUG: Bad rss-counter state mm:00000000019cd4e9 type:MM_ANONPAGES val:22 [ 116.132094] ================================================================== [ 116.133086] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 116.134001] Read of size 8 at addr ffff88800ddd9798 by task sshd/218 [ 116.134869] [ 116.135097] CPU: 0 PID: 218 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 116.136126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 116.137107] Call Trace: [ 116.137433] [ 116.137717] dump_stack_lvl+0x91/0xf0 [ 116.138198] print_report+0xcc/0x620 [ 116.138677] ? __virt_addr_valid+0x102/0x340 [ 116.139226] ? vma_interval_tree_remove+0xc75/0xec0 [ 116.139829] ? vma_interval_tree_remove+0xc75/0xec0 [ 116.140465] kasan_report+0xbe/0xf0 [ 116.140936] ? vma_interval_tree_remove+0xc75/0xec0 [ 116.141561] vma_interval_tree_remove+0xc75/0xec0 [ 116.142159] vma_prepare+0xc54/0x11a0 [ 116.142643] __split_vma+0x5af/0x950 [ 116.143115] ? __pfx___split_vma+0x10/0x10 [ 116.143644] ? find_held_lock+0x2c/0x110 [ 116.144159] do_vmi_align_munmap+0x2ba/0x11f0 [ 116.144737] ? lock_is_held_type+0x9f/0x120 [ 116.145270] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 116.145871] ? mtree_range_walk+0x632/0x900 [ 116.146414] ? mas_walk+0x5c7/0x7c0 [ 116.146889] do_vmi_munmap+0x1f1/0x2b0 [ 116.147379] mmap_region+0x1f9/0x2660 [ 116.147858] ? vm_mmap_pgoff+0x15c/0x3a0 [ 116.148371] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 116.149071] ? __pfx_lock_acquire+0x10/0x10 [ 116.149600] ? __pfx_mmap_region+0x10/0x10 [ 116.150122] ? security_mmap_addr+0x7d/0xa0 [ 116.150650] ? get_unmapped_area+0x1f5/0x3f0 [ 116.151193] do_mmap+0x854/0xf00 [ 116.151627] vm_mmap_pgoff+0x1a6/0x3a0 [ 116.152118] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 116.152695] ksys_mmap_pgoff+0x3af/0x500 [ 116.153199] do_syscall_64+0x3f/0x90 [ 116.153671] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 116.154313] RIP: 0033:0x7fa83963ad82 [ 116.154768] 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 [ 116.156876] RSP: 002b:00007ffe5777e5a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 116.157778] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa83963ad82 [ 116.158607] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa838a74000 [ 116.159438] RBP: 00007fa838a74000 R08: 0000000000000009 R09: 0000000000001000 [ 116.160277] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557c4e15bec0 [ 116.161109] R13: 00007ffe5777e5c0 R14: 00007ffe5777e5f0 R15: 00007ffe5777e950 [ 116.161964] [ 116.162251] [ 116.162462] Allocated by task 211: [ 116.162887] kasan_save_stack+0x22/0x50 [ 116.163386] kasan_set_track+0x25/0x30 [ 116.163880] __kasan_slab_alloc+0x59/0x70 [ 116.164416] kmem_cache_alloc+0x16b/0x370 [ 116.164929] vm_area_dup+0x20/0x160 [ 116.165374] __split_vma+0x170/0x950 [ 116.165835] split_vma+0xc6/0x110 [ 116.166269] mprotect_fixup+0x8d2/0xb30 [ 116.166768] do_mprotect_pkey+0x87e/0xd40 [ 116.167289] __x64_sys_mprotect+0x78/0xc0 [ 116.167807] do_syscall_64+0x3f/0x90 [ 116.168296] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 116.168929] [ 116.169152] Freed by task 211: [ 116.169545] kasan_save_stack+0x22/0x50 [ 116.170053] kasan_set_track+0x25/0x30 [ 116.170552] kasan_save_free_info+0x2b/0x50 [ 116.171082] __kasan_slab_free+0x10a/0x190 [ 116.171623] kmem_cache_free+0x10d/0x4d0 [ 116.172128] rcu_core+0x8c8/0x2860 [ 116.172584] __do_softirq+0x1b7/0x7d4 [ 116.173059] [ 116.173276] Last potentially related work creation: [ 116.173855] kasan_save_stack+0x22/0x50 [ 116.174356] __kasan_record_aux_stack+0x8e/0xa0 [ 116.174937] __call_rcu_common.constprop.0+0x6a/0xb90 [ 116.175585] remove_vma+0x139/0x170 [ 116.176052] do_vmi_align_munmap+0xd4a/0x11f0 [ 116.176638] do_vmi_munmap+0x1f1/0x2b0 [ 116.177140] __vm_munmap+0x138/0x3a0 [ 116.177620] __x64_sys_munmap+0x59/0x80 [ 116.178138] do_syscall_64+0x3f/0x90 [ 116.178625] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 116.179287] [ 116.179511] The buggy address belongs to the object at ffff88800ddd9740 [ 116.179511] which belongs to the cache vm_area_struct of size 168 [ 116.181044] The buggy address is located 88 bytes inside of [ 116.181044] freed 168-byte region [ffff88800ddd9740, ffff88800ddd97e8) [ 116.182491] [ 116.182714] The buggy address belongs to the physical page: [ 116.183406] page:000000002e225985 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xddd9 [ 116.184548] memcg:ffff88800e013601 [ 116.184993] flags: 0x100000000000200(slab|node=0|zone=1) [ 116.185663] page_type: 0xffffffff() [ 116.186126] raw: 0100000000000200 ffff88800879fc80 ffffea0000358ec0 dead000000000002 [ 116.187076] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e013601 [ 116.188028] page dumped because: kasan: bad access detected [ 116.188732] [ 116.188956] Memory state around the buggy address: [ 116.189569] ffff88800ddd9680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 116.190459] ffff88800ddd9700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 116.191347] >ffff88800ddd9780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 116.192255] ^ [ 116.192771] ffff88800ddd9800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 116.193670] ffff88800ddd9880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 116.194547] ================================================================== [ 116.195661] Disabling lock debugging due to kernel taint [ 118.062700] BUG: Bad rss-counter state mm:00000000efe13729 type:MM_FILEPAGES val:33 [ 118.063473] BUG: Bad rss-counter state mm:00000000efe13729 type:MM_ANONPAGES val:22 [ 118.531621] BUG: Bad rss-counter state mm:0000000045edace7 type:MM_FILEPAGES val:33 [ 118.532795] BUG: Bad rss-counter state mm:0000000045edace7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:7538' (ECDSA) to the list of known hosts. 2023/06/19 16:58:40 fuzzer started 2023/06/19 16:58:40 dialing manager at localhost:44161 2023/06/19 16:58:40 checking machine... 2023/06/19 16:58:40 checking revisions... [ 119.183658] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:58:40 testing simple program... [ 119.228886] cgroup: Unknown subsys name 'net' [ 119.313956] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:22 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=0000000000000001 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=00007ffcaf653948 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=00007fbb02bff510000055f833ec4790 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=ffffffff8613ffeb RBX=0000000000000001 RCX=ffffffff8613ffe6 RDX=0000000000000002 RSI=0000000000000003 RDI=ffffffff85e0266c RBP=ffff88800ed67af8 RSP=ffff88800ed67a30 R8 =ffffffff8613ffb0 R9 =ffff88800ed67ae0 R10=0000000000038001 R11=00000000000224a6 R12=ffff88800ed67b00 R13=ffff88800ed67ae8 R14=ffff88800ed67ae1 R15=ffff88800ed67aa0 RIP=ffffffff81130a72 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 00007fe2abf2c900 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=00007fe2ac4e3618 CR3=0000000015c00000 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=563412feff00545000000000000080fe 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