syzkaller login: [ 38.249490] BUG: Bad rss-counter state mm:00000000bba702ac type:MM_FILEPAGES val:33 [ 38.251521] BUG: Bad rss-counter state mm:00000000bba702ac type:MM_ANONPAGES val:22 [ 38.432854] ================================================================== [ 38.433959] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.435212] Read of size 8 at addr ffff8880159e15c8 by task sshd/219 [ 38.436103] [ 38.436344] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.437310] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.438401] Call Trace: [ 38.438753] [ 38.439067] dump_stack_lvl+0x91/0xf0 [ 38.439649] print_report+0xcc/0x620 [ 38.440182] ? __virt_addr_valid+0x102/0x340 [ 38.440790] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.441472] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.442184] kasan_report+0xbe/0xf0 [ 38.442710] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.443393] vma_interval_tree_remove+0xc75/0xec0 [ 38.444094] vma_prepare+0xc54/0x11a0 [ 38.444627] __split_vma+0x5af/0x950 [ 38.445153] ? __pfx___split_vma+0x10/0x10 [ 38.445741] ? find_held_lock+0x2c/0x110 [ 38.446333] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.446957] ? lock_is_held_type+0x9f/0x120 [ 38.447593] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.448266] ? mtree_range_walk+0x632/0x900 [ 38.448879] ? mas_walk+0x5c7/0x7c0 [ 38.449400] do_vmi_munmap+0x1f1/0x2b0 [ 38.449942] mmap_region+0x1f9/0x2660 [ 38.450487] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.451056] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.451883] ? __pfx_lock_acquire+0x10/0x10 [ 38.452476] ? __pfx_mmap_region+0x10/0x10 [ 38.453058] ? security_mmap_addr+0x7d/0xa0 [ 38.453649] ? get_unmapped_area+0x1f5/0x3f0 [ 38.454280] do_mmap+0x854/0xf00 [ 38.454769] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.455320] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.455982] ksys_mmap_pgoff+0x3af/0x500 [ 38.456549] do_syscall_64+0x3f/0x90 [ 38.457075] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.457802] RIP: 0033:0x7f6817609d82 [ 38.458319] 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 [ 38.460714] RSP: 002b:00007ffc6bcfa8d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.461720] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6817609d82 [ 38.462673] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6816a43000 [ 38.463646] RBP: 00007f6816a43000 R08: 0000000000000009 R09: 0000000000001000 [ 38.464608] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b3f96f2b20 [ 38.465554] R13: 00007ffc6bcfa8f0 R14: 00007ffc6bcfa920 R15: 00007ffc6bcfac80 [ 38.466527] [ 38.466846] [ 38.467080] Allocated by task 212: [ 38.467550] kasan_save_stack+0x22/0x50 [ 38.468105] kasan_set_track+0x25/0x30 [ 38.468695] __kasan_slab_alloc+0x59/0x70 [ 38.469278] kmem_cache_alloc+0x16b/0x370 [ 38.469851] vm_area_dup+0x20/0x160 [ 38.470369] __split_vma+0x170/0x950 [ 38.470883] split_vma+0xc6/0x110 [ 38.471376] mprotect_fixup+0x8d2/0xb30 [ 38.471927] do_mprotect_pkey+0x87e/0xd40 [ 38.472523] __x64_sys_mprotect+0x78/0xc0 [ 38.473131] do_syscall_64+0x3f/0x90 [ 38.473655] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.474382] [ 38.474619] Freed by task 212: [ 38.475052] kasan_save_stack+0x22/0x50 [ 38.475618] kasan_set_track+0x25/0x30 [ 38.476167] kasan_save_free_info+0x2b/0x50 [ 38.476792] __kasan_slab_free+0x10a/0x190 [ 38.477381] kmem_cache_free+0x10d/0x4d0 [ 38.477940] rcu_core+0x8c8/0x2860 [ 38.478472] __do_softirq+0x1b7/0x7d4 [ 38.479004] [ 38.479238] Last potentially related work creation: [ 38.479879] kasan_save_stack+0x22/0x50 [ 38.480440] __kasan_record_aux_stack+0x8e/0xa0 [ 38.481116] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.481824] remove_vma+0x139/0x170 [ 38.482340] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.482956] do_vmi_munmap+0x1f1/0x2b0 [ 38.483490] __vm_munmap+0x138/0x3a0 [ 38.484019] __x64_sys_munmap+0x59/0x80 [ 38.484603] do_syscall_64+0x3f/0x90 [ 38.485134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.485844] [ 38.486081] The buggy address belongs to the object at ffff8880159e1570 [ 38.486081] which belongs to the cache vm_area_struct of size 168 [ 38.487718] The buggy address is located 88 bytes inside of [ 38.487718] freed 168-byte region [ffff8880159e1570, ffff8880159e1618) [ 38.489317] [ 38.489555] The buggy address belongs to the physical page: [ 38.490309] page:00000000dc045a83 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x159e1 [ 38.491512] memcg:ffff88800e016801 [ 38.491982] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.492805] page_type: 0xffffffff() [ 38.493307] raw: 0100000000000200 ffff8880087a0c80 ffffea000037f6c0 dead000000000003 [ 38.494344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e016801 [ 38.495338] page dumped because: kasan: bad access detected [ 38.496062] [ 38.496296] Memory state around the buggy address: [ 38.496979] ffff8880159e1480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.497917] ffff8880159e1500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 38.498872] >ffff8880159e1580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.499846] ^ [ 38.500602] ffff8880159e1600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 38.501523] ffff8880159e1680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 38.502454] ================================================================== [ 38.503565] Disabling lock debugging due to kernel taint [ 40.835751] BUG: Bad rss-counter state mm:0000000091c77975 type:MM_FILEPAGES val:33 [ 40.836944] BUG: Bad rss-counter state mm:0000000091c77975 type:MM_ANONPAGES val:22 [ 41.244442] BUG: Bad rss-counter state mm:0000000065c25d80 type:MM_FILEPAGES val:33 [ 41.245485] BUG: Bad rss-counter state mm:0000000065c25d80 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:54699' (ECDSA) to the list of known hosts. 2023/06/21 10:27:00 fuzzer started 2023/06/21 10:27:00 dialing manager at localhost:36067 2023/06/21 10:27:00 checking machine... 2023/06/21 10:27:00 checking revisions... [ 42.046756] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:27:00 testing simple program... [ 42.093094] cgroup: Unknown subsys name 'net' [ 42.151651] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:27:00 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c04000 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f42631e4460 CR3=000000000db68000 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=5f2cea811519c98f6345bc66771c24ed XMM02=ec2efd57dc4c00df000000000011d3a0 XMM03=7cb3b15a3fa4e79d000000000011d470 XMM04=262d2afe1c4ee13600000000000ae988 XMM05=dfcdbad4f1609c370000000000130ba8 XMM06=f2512898deacbf8f000000000012fd80 XMM07=e042d86d42eb936e00000000001212d0 XMM08=7cb3b15a3fa4e79d000000000011d470 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000080000000 RBX=0000000000000008 RCX=ffffffff8184ce90 RDX=ffff8880166ad1c0 RSI=0000000000000000 RDI=0000000000000007 RBP=ffff88800e937a3c RSP=ffff88800e937908 R8 =0000000000000007 R9 =0000000000000010 R10=ffff88800e937a34 R11=0000000000000000 R12=ffff88800e937a34 R13=0000000000000000 R14=ffff88800e937a3b R15=ffff88800e937a34 RIP=ffffffff814c086b RFL=00000286 [--S--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 00007f3f83166700 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=00007f6ff9914618 CR3=000000000fce8000 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=36323a3031203132206e754a3e36383c XMM01=7365733a646873732878696e755f6d61 XMM02=736f6c63206e6f6973736573203a296e XMM03=5f6d6170203a5d3832325b6468737320 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320323034 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000