syzkaller login: [ 32.377615] BUG: Bad rss-counter state mm:0000000012145df1 type:MM_FILEPAGES val:33 [ 32.378875] BUG: Bad rss-counter state mm:0000000012145df1 type:MM_ANONPAGES val:22 [ 32.415852] ================================================================== [ 32.416794] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.417840] Read of size 8 at addr ffff88801974da50 by task sshd/221 [ 32.418628] [ 32.418849] CPU: 0 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.419731] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.420722] Call Trace: [ 32.421044] [ 32.421328] dump_stack_lvl+0x91/0xf0 [ 32.421823] print_report+0xcc/0x620 [ 32.422313] ? __virt_addr_valid+0x102/0x340 [ 32.422885] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.423512] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.424129] kasan_report+0xbe/0xf0 [ 32.424603] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.425234] vma_interval_tree_remove+0xc75/0xec0 [ 32.425849] vma_prepare+0xc54/0x11a0 [ 32.426328] __split_vma+0x5af/0x950 [ 32.426809] ? __pfx___split_vma+0x10/0x10 [ 32.427345] ? find_held_lock+0x2c/0x110 [ 32.427864] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.428434] ? lock_is_held_type+0x9f/0x120 [ 32.428974] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.429584] ? mtree_range_walk+0x632/0x900 [ 32.430137] ? mas_walk+0x5c7/0x7c0 [ 32.430619] do_vmi_munmap+0x1f1/0x2b0 [ 32.431114] mmap_region+0x1f9/0x2660 [ 32.431602] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.432119] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.432847] ? __pfx_lock_acquire+0x10/0x10 [ 32.433392] ? __pfx_mmap_region+0x10/0x10 [ 32.433921] ? security_mmap_addr+0x7d/0xa0 [ 32.434481] ? get_unmapped_area+0x1f5/0x3f0 [ 32.435041] do_mmap+0x854/0xf00 [ 32.435487] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.435984] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.436546] ksys_mmap_pgoff+0x3af/0x500 [ 32.437054] do_syscall_64+0x3f/0x90 [ 32.437538] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.438189] RIP: 0033:0x7fbc4f0ddd82 [ 32.438663] 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 [ 32.440835] RSP: 002b:00007fff645b53b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.441761] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fbc4f0ddd82 [ 32.442633] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fbc4e517000 [ 32.443511] RBP: 00007fbc4e517000 R08: 0000000000000009 R09: 0000000000001000 [ 32.444358] R10: 0000000000000812 R11: 0000000000000206 R12: 00005573b0144ec0 [ 32.445200] R13: 00007fff645b53d0 R14: 00007fff645b5400 R15: 00007fff645b5760 [ 32.446061] [ 32.446359] [ 32.446591] Allocated by task 214: [ 32.447024] kasan_save_stack+0x22/0x50 [ 32.447541] kasan_set_track+0x25/0x30 [ 32.448043] __kasan_slab_alloc+0x59/0x70 [ 32.448579] kmem_cache_alloc+0x16b/0x370 [ 32.449099] vm_area_dup+0x20/0x160 [ 32.449558] __split_vma+0x170/0x950 [ 32.450030] split_vma+0xc6/0x110 [ 32.450477] mprotect_fixup+0x8d2/0xb30 [ 32.450984] do_mprotect_pkey+0x87e/0xd40 [ 32.451522] __x64_sys_mprotect+0x78/0xc0 [ 32.452042] do_syscall_64+0x3f/0x90 [ 32.452523] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.453166] [ 32.453383] Freed by task 214: [ 32.453778] kasan_save_stack+0x22/0x50 [ 32.454282] kasan_set_track+0x25/0x30 [ 32.454795] kasan_save_free_info+0x2b/0x50 [ 32.455335] __kasan_slab_free+0x10a/0x190 [ 32.455870] kmem_cache_free+0x10d/0x4d0 [ 32.456384] rcu_core+0x8c8/0x2860 [ 32.456832] __do_softirq+0x1b7/0x7d4 [ 32.457311] [ 32.457534] Last potentially related work creation: [ 32.458126] kasan_save_stack+0x22/0x50 [ 32.458645] __kasan_record_aux_stack+0x8e/0xa0 [ 32.459227] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.459870] remove_vma+0x139/0x170 [ 32.460326] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.460888] do_vmi_munmap+0x1f1/0x2b0 [ 32.461392] __vm_munmap+0x138/0x3a0 [ 32.461864] __x64_sys_munmap+0x59/0x80 [ 32.462367] do_syscall_64+0x3f/0x90 [ 32.462867] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.463515] [ 32.463734] The buggy address belongs to the object at ffff88801974d9f8 [ 32.463734] which belongs to the cache vm_area_struct of size 168 [ 32.465236] The buggy address is located 88 bytes inside of [ 32.465236] freed 168-byte region [ffff88801974d9f8, ffff88801974daa0) [ 32.466673] [ 32.466890] The buggy address belongs to the physical page: [ 32.467566] page:00000000979bc881 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1974d [ 32.468694] memcg:ffff88800963c701 [ 32.469118] flags: 0x100000000000200(slab|node=0|zone=1) [ 32.469762] page_type: 0xffffffff() [ 32.470214] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 32.471162] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800963c701 [ 32.472092] page dumped because: kasan: bad access detected [ 32.472760] [ 32.472974] Memory state around the buggy address: [ 32.473571] ffff88801974d900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 32.474447] ffff88801974d980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 32.475329] >ffff88801974da00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.476181] ^ [ 32.476887] ffff88801974da80: fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb [ 32.477763] ffff88801974db00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.478629] ================================================================== [ 32.479704] Disabling lock debugging due to kernel taint [ 34.241345] BUG: Bad rss-counter state mm:0000000038d13487 type:MM_FILEPAGES val:33 [ 34.242056] BUG: Bad rss-counter state mm:0000000038d13487 type:MM_ANONPAGES val:22 [ 34.668451] BUG: Bad rss-counter state mm:000000001062afea type:MM_FILEPAGES val:33 [ 34.669208] BUG: Bad rss-counter state mm:000000001062afea type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39411' (ECDSA) to the list of known hosts. 2023/06/19 16:57:29 fuzzer started 2023/06/19 16:57:30 dialing manager at localhost:44161 2023/06/19 16:57:30 checking machine... 2023/06/19 16:57:30 checking revisions... [ 35.393401] kmemleak: Automatic memory scanning thread ended 2023/06/19 16:57:30 testing simple program... [ 35.438418] cgroup: Unknown subsys name 'net' [ 35.478049] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:57:27 Registers: info registers vcpu 0 RAX=ffffffff83644420 RBX=0000000000000000 RCX=1ffffffff0ba7a02 RDX=ffffffffffffffff RSI=0000000000000000 RDI=ffff88800ebe7f58 RBP=ffff88800ebe7f48 RSP=ffff88800ebe7f30 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=0000000000000000 R12=ffff88800ebe7f58 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff83644425 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 00007fa826439900 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=00007fa8269f0618 CR3=000000000d872000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 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=00007efe7c478020 CR3=0000000009494000 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=84dc0c71ed7a8db20b4f77661ae01f7b XMM02=ec2efd57dc4c00df0000000000120d20 XMM03=4a0a573615860efe0000000000120df0 XMM04=e0ef80100a6303d100000000000ae988 XMM05=e4cb8bb95a7664b60000000000134ff8 XMM06=35faea433f70d2850000000000133e60 XMM07=e042d86d42eb936e00000000001256d8 XMM08=4a0a573615860efe0000000000120df0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000