syzkaller login: [ 40.979550] BUG: Bad rss-counter state mm:000000008fa34e2b type:MM_FILEPAGES val:33 [ 40.980779] BUG: Bad rss-counter state mm:000000008fa34e2b type:MM_ANONPAGES val:22 [ 41.020354] ================================================================== [ 41.021314] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 41.022258] Read of size 8 at addr ffff88800ea32310 by task sshd/220 [ 41.023191] [ 41.023416] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 41.024286] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 41.025288] Call Trace: [ 41.025612] [ 41.025900] dump_stack_lvl+0x91/0xf0 [ 41.026395] print_report+0xcc/0x620 [ 41.026883] ? __virt_addr_valid+0x102/0x340 [ 41.027441] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.028080] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.028700] kasan_report+0xbe/0xf0 [ 41.029225] ? vma_interval_tree_remove+0xc75/0xec0 [ 41.029854] vma_interval_tree_remove+0xc75/0xec0 [ 41.030453] vma_prepare+0xc54/0x11a0 [ 41.030934] __split_vma+0x5af/0x950 [ 41.031403] ? __pfx___split_vma+0x10/0x10 [ 41.031932] ? find_held_lock+0x2c/0x110 [ 41.032449] do_vmi_align_munmap+0x2ba/0x11f0 [ 41.033009] ? lock_is_held_type+0x9f/0x120 [ 41.033548] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 41.034153] ? mtree_range_walk+0x632/0x900 [ 41.034706] ? mas_walk+0x5c7/0x7c0 [ 41.035182] do_vmi_munmap+0x1f1/0x2b0 [ 41.035677] mmap_region+0x1f9/0x2660 [ 41.036168] ? vm_mmap_pgoff+0x15c/0x3a0 [ 41.036687] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 41.037409] ? __pfx_lock_acquire+0x10/0x10 [ 41.037942] ? __pfx_mmap_region+0x10/0x10 [ 41.038474] ? security_mmap_addr+0x7d/0xa0 [ 41.039006] ? get_unmapped_area+0x1f5/0x3f0 [ 41.039558] do_mmap+0x854/0xf00 [ 41.040000] vm_mmap_pgoff+0x1a6/0x3a0 [ 41.040497] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 41.041083] ksys_mmap_pgoff+0x3af/0x500 [ 41.041594] do_syscall_64+0x3f/0x90 [ 41.042078] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.042730] RIP: 0033:0x7f74ac971d82 [ 41.043197] 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 [ 41.045350] RSP: 002b:00007ffd08020b58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 41.046250] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f74ac971d82 [ 41.047107] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f74abdab000 [ 41.047951] RBP: 00007f74abdab000 R08: 0000000000000009 R09: 0000000000001000 [ 41.048807] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cabb74cf70 [ 41.049669] R13: 00007ffd08020b70 R14: 00007ffd08020ba0 R15: 00007ffd08020f00 [ 41.050523] [ 41.050818] [ 41.051038] Allocated by task 213: [ 41.051460] kasan_save_stack+0x22/0x50 [ 41.051966] kasan_set_track+0x25/0x30 [ 41.052462] __kasan_slab_alloc+0x59/0x70 [ 41.052995] kmem_cache_alloc+0x16b/0x370 [ 41.053533] vm_area_dup+0x20/0x160 [ 41.053996] __split_vma+0x170/0x950 [ 41.054462] split_vma+0xc6/0x110 [ 41.054908] mprotect_fixup+0x8d2/0xb30 [ 41.055413] do_mprotect_pkey+0x87e/0xd40 [ 41.055939] __x64_sys_mprotect+0x78/0xc0 [ 41.056456] do_syscall_64+0x3f/0x90 [ 41.056931] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.057582] [ 41.057796] Freed by task 13: [ 41.058184] kasan_save_stack+0x22/0x50 [ 41.058692] kasan_set_track+0x25/0x30 [ 41.059188] kasan_save_free_info+0x2b/0x50 [ 41.059723] __kasan_slab_free+0x10a/0x190 [ 41.060265] kmem_cache_free+0x10d/0x4d0 [ 41.060778] rcu_core+0x8c8/0x2860 [ 41.061234] __do_softirq+0x1b7/0x7d4 [ 41.061712] [ 41.061925] Last potentially related work creation: [ 41.062522] kasan_save_stack+0x22/0x50 [ 41.063033] __kasan_record_aux_stack+0x8e/0xa0 [ 41.063688] __call_rcu_common.constprop.0+0x6a/0xb90 [ 41.064331] remove_vma+0x139/0x170 [ 41.064778] do_vmi_align_munmap+0xd4a/0x11f0 [ 41.065345] do_vmi_munmap+0x1f1/0x2b0 [ 41.065834] __vm_munmap+0x138/0x3a0 [ 41.066299] __x64_sys_munmap+0x59/0x80 [ 41.066796] do_syscall_64+0x3f/0x90 [ 41.067283] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 41.067928] [ 41.068146] The buggy address belongs to the object at ffff88800ea322b8 [ 41.068146] which belongs to the cache vm_area_struct of size 168 [ 41.069624] The buggy address is located 88 bytes inside of [ 41.069624] freed 168-byte region [ffff88800ea322b8, ffff88800ea32360) [ 41.071025] [ 41.071240] The buggy address belongs to the physical page: [ 41.071890] page:0000000047379ab0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xea32 [ 41.072970] memcg:ffff88800ea18101 [ 41.073414] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 41.074116] page_type: 0xffffffff() [ 41.074564] raw: 0100000000000200 ffff88800879fc80 ffffea000038ad40 dead00000000000d [ 41.075477] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea18101 [ 41.076386] page dumped because: kasan: bad access detected [ 41.077046] [ 41.077278] Memory state around the buggy address: [ 41.077855] ffff88800ea32200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 41.078714] ffff88800ea32280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 41.079572] >ffff88800ea32300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 41.080418] ^ [ 41.080883] ffff88800ea32380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 41.081753] ffff88800ea32400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 41.082618] ================================================================== [ 41.083598] Disabling lock debugging due to kernel taint [ 43.326993] BUG: Bad rss-counter state mm:00000000b028bc7c type:MM_FILEPAGES val:33 [ 43.327995] BUG: Bad rss-counter state mm:00000000b028bc7c type:MM_ANONPAGES val:22 [ 43.799891] BUG: Bad rss-counter state mm:000000004ca223e5 type:MM_FILEPAGES val:33 [ 43.800912] BUG: Bad rss-counter state mm:000000004ca223e5 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:12836' (ECDSA) to the list of known hosts. 2023/06/19 14:53:29 fuzzer started 2023/06/19 14:53:29 dialing manager at localhost:44161 2023/06/19 14:53:29 checking machine... 2023/06/19 14:53:29 checking revisions... [ 44.527414] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:53:30 testing simple program... [ 44.575369] cgroup: Unknown subsys name 'net' [ 44.632123] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:53:19 Registers: info registers vcpu 0 RAX=ffffffff83646bbf RBX=ffffffff85fa488c RCX=ffffffff83646b4a RDX=0000000000000000 RSI=ffffffff863b32da RDI=ffffffff85fa4888 RBP=ffffffff85fa488c RSP=ffff88801458f730 R8 =ffffffff863b32da R9 =ffff88801458f828 R10=0000000000038001 R11=000000000008ad2d R12=ffffffff85fa4888 R13=ffffffff85fa4888 R14=ffffffff85fa4888 R15=dffffc0000000000 RIP=ffffffff8112fc9f RFL=00000297 [--S-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 00007f45b9c09900 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=00007f45ba1c10b0 CR3=000000000e194000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 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=00007f717d134630 CR3=000000000c9d2000 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=9c0eace3c63383a8a64aadd22c5a62a2 XMM02=2c67c8bc2e329bc3000000000011e350 XMM03=fb795ef6d65770560000000000124cf0 XMM04=f68683246019819200000000000ae988 XMM05=19e9129bd510f2350000000000134580 XMM06=4fda316b135da52b0000000000134408 XMM07=e042d86d42eb936e0000000000124fc8 XMM08=6b4cb989755e474c000000000011e3b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000