syzkaller login: [ 31.087434] BUG: Bad rss-counter state mm:00000000e837100f type:MM_FILEPAGES val:33 [ 31.088895] BUG: Bad rss-counter state mm:00000000e837100f type:MM_ANONPAGES val:22 [ 31.263003] ================================================================== [ 31.263928] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.264869] Read of size 8 at addr ffff88801654b6b0 by task sshd/221 [ 31.265645] [ 31.265868] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.266840] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.267815] Call Trace: [ 31.268147] [ 31.268429] dump_stack_lvl+0x91/0xf0 [ 31.268919] print_report+0xcc/0x620 [ 31.269409] ? __virt_addr_valid+0x102/0x340 [ 31.269964] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.270584] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.271200] kasan_report+0xbe/0xf0 [ 31.271671] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.272308] vma_interval_tree_remove+0xc75/0xec0 [ 31.272907] vma_prepare+0xc54/0x11a0 [ 31.273392] __split_vma+0x5af/0x950 [ 31.273862] ? __pfx___split_vma+0x10/0x10 [ 31.274394] ? find_held_lock+0x2c/0x110 [ 31.274911] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.275482] ? lock_is_held_type+0x9f/0x120 [ 31.276023] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.276634] ? mtree_range_walk+0x632/0x900 [ 31.277179] ? mas_walk+0x5c7/0x7c0 [ 31.277649] do_vmi_munmap+0x1f1/0x2b0 [ 31.278143] mmap_region+0x1f9/0x2660 [ 31.278625] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.279137] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.279870] ? __pfx_lock_acquire+0x10/0x10 [ 31.280406] ? __pfx_mmap_region+0x10/0x10 [ 31.280937] ? security_mmap_addr+0x7d/0xa0 [ 31.281473] ? get_unmapped_area+0x1f5/0x3f0 [ 31.282020] do_mmap+0x854/0xf00 [ 31.282459] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.282960] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.283531] ksys_mmap_pgoff+0x3af/0x500 [ 31.284044] do_syscall_64+0x3f/0x90 [ 31.284524] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.285169] RIP: 0033:0x7fb01455cd82 [ 31.285631] 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 [ 31.287757] RSP: 002b:00007ffde249c908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.288670] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb01455cd82 [ 31.289524] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb013996000 [ 31.290377] RBP: 00007fb013996000 R08: 0000000000000009 R09: 0000000000001000 [ 31.291224] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c1af429ec0 [ 31.292087] R13: 00007ffde249c920 R14: 00007ffde249c950 R15: 00007ffde249ccb0 [ 31.292948] [ 31.293239] [ 31.293453] Allocated by task 214: [ 31.293886] kasan_save_stack+0x22/0x50 [ 31.294389] kasan_set_track+0x25/0x30 [ 31.294887] __kasan_slab_alloc+0x59/0x70 [ 31.295410] kmem_cache_alloc+0x16b/0x370 [ 31.295936] vm_area_dup+0x20/0x160 [ 31.296390] __split_vma+0x170/0x950 [ 31.296852] split_vma+0xc6/0x110 [ 31.297294] mprotect_fixup+0x8d2/0xb30 [ 31.297803] do_mprotect_pkey+0x87e/0xd40 [ 31.298322] __x64_sys_mprotect+0x78/0xc0 [ 31.298851] do_syscall_64+0x3f/0x90 [ 31.299322] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.299975] [ 31.300191] Freed by task 13: [ 31.300573] kasan_save_stack+0x22/0x50 [ 31.301076] kasan_set_track+0x25/0x30 [ 31.301568] kasan_save_free_info+0x2b/0x50 [ 31.302103] __kasan_slab_free+0x10a/0x190 [ 31.302632] kmem_cache_free+0x10d/0x4d0 [ 31.303137] rcu_core+0x8c8/0x2860 [ 31.303585] __do_softirq+0x1b7/0x7d4 [ 31.304074] [ 31.304289] Last potentially related work creation: [ 31.304876] kasan_save_stack+0x22/0x50 [ 31.305378] __kasan_record_aux_stack+0x8e/0xa0 [ 31.305951] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.306609] remove_vma+0x139/0x170 [ 31.307061] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.307620] do_vmi_munmap+0x1f1/0x2b0 [ 31.308110] __vm_munmap+0x138/0x3a0 [ 31.308582] __x64_sys_munmap+0x59/0x80 [ 31.309072] do_syscall_64+0x3f/0x90 [ 31.309546] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.310186] [ 31.310396] The buggy address belongs to the object at ffff88801654b658 [ 31.310396] which belongs to the cache vm_area_struct of size 168 [ 31.311894] The buggy address is located 88 bytes inside of [ 31.311894] freed 168-byte region [ffff88801654b658, ffff88801654b700) [ 31.313297] [ 31.313517] The buggy address belongs to the physical page: [ 31.314190] page:00000000f6e36e02 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1654b [ 31.315290] memcg:ffff88800f0cc001 [ 31.315713] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.316364] page_type: 0xffffffff() [ 31.316819] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.317734] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f0cc001 [ 31.318648] page dumped because: kasan: bad access detected [ 31.319315] [ 31.319537] Memory state around the buggy address: [ 31.320133] ffff88801654b580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.320989] ffff88801654b600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.321846] >ffff88801654b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.322713] ^ [ 31.323299] ffff88801654b700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.324171] ffff88801654b780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.325038] ================================================================== [ 31.326030] Disabling lock debugging due to kernel taint [ 33.238388] BUG: Bad rss-counter state mm:00000000e008b053 type:MM_FILEPAGES val:33 [ 33.239528] BUG: Bad rss-counter state mm:00000000e008b053 type:MM_ANONPAGES val:22 [ 33.735022] BUG: Bad rss-counter state mm:0000000069c68d2b type:MM_FILEPAGES val:33 [ 33.736209] BUG: Bad rss-counter state mm:0000000069c68d2b type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:40454' (ECDSA) to the list of known hosts. 2023/06/19 17:42:42 fuzzer started 2023/06/19 17:42:42 dialing manager at localhost:44161 2023/06/19 17:42:42 checking machine... 2023/06/19 17:42:42 checking revisions... [ 34.437473] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:42:42 testing simple program... [ 34.491986] cgroup: Unknown subsys name 'net' [ 34.534772] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:42:41 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=00007fff4b133648 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=00007f9661f635100000557d63337790 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=0000000000000000 RBX=ffff88800c6db300 RCX=ffffea000031b601 RDX=ffffea000031b600 RSI=ffff888019909100 RDI=ffff8880087b63c0 RBP=0000000000000000 RSP=ffff888014637c78 R8 =ffff88800c6dc400 R9 =0000000000000000 R10=ffffea0000664200 R11=0000000000070003 R12=dffffc0000000000 R13=ffff888014637cb8 R14=ffff8880087b63c0 R15=ffff888019909100 RIP=ffffffff81810196 RFL=00000202 [-------] 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 00007f4840b0e900 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=00007fa0e3c68650 CR3=000000000cacc000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=6194e478f37f8fd800000000000ae988 XMM05=6aac9f18baa39dbd0000000000135068 XMM06=c291bd5c70af25b90000000000133e58 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000