syzkaller login: [ 35.149778] BUG: Bad rss-counter state mm:00000000f781a2d5 type:MM_FILEPAGES val:33 [ 35.150920] BUG: Bad rss-counter state mm:00000000f781a2d5 type:MM_ANONPAGES val:22 [ 35.294854] ================================================================== [ 35.295778] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.296739] Read of size 8 at addr ffff88800e039140 by task sshd/221 [ 35.297500] [ 35.297720] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 35.298820] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.299782] Call Trace: [ 35.300101] [ 35.300387] dump_stack_lvl+0x91/0xf0 [ 35.300915] print_report+0xcc/0x620 [ 35.301400] ? __virt_addr_valid+0x102/0x340 [ 35.301954] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.302570] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.303206] kasan_report+0xbe/0xf0 [ 35.303687] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.304311] vma_interval_tree_remove+0xc75/0xec0 [ 35.304959] vma_prepare+0xc54/0x11a0 [ 35.305444] __split_vma+0x5af/0x950 [ 35.305923] ? __pfx___split_vma+0x10/0x10 [ 35.306450] ? find_held_lock+0x2c/0x110 [ 35.306982] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.307544] ? lock_is_held_type+0x9f/0x120 [ 35.308088] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.308710] ? mtree_range_walk+0x632/0x900 [ 35.309267] ? mas_walk+0x5c7/0x7c0 [ 35.309749] do_vmi_munmap+0x1f1/0x2b0 [ 35.310247] mmap_region+0x1f9/0x2660 [ 35.310731] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.311235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.311954] ? __pfx_lock_acquire+0x10/0x10 [ 35.312506] ? __pfx_mmap_region+0x10/0x10 [ 35.313041] ? security_mmap_addr+0x7d/0xa0 [ 35.313580] ? get_unmapped_area+0x1f5/0x3f0 [ 35.314133] do_mmap+0x854/0xf00 [ 35.314571] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.315067] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.315638] ksys_mmap_pgoff+0x3af/0x500 [ 35.316147] do_syscall_64+0x3f/0x90 [ 35.316640] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.317291] RIP: 0033:0x7fb2dfe83d82 [ 35.317748] 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 [ 35.319889] RSP: 002b:00007ffe78a04998 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.320814] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb2dfe83d82 [ 35.321664] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb2df2bd000 [ 35.322509] RBP: 00007fb2df2bd000 R08: 0000000000000009 R09: 0000000000001000 [ 35.323351] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562b87a95ec0 [ 35.324200] R13: 00007ffe78a049b0 R14: 00007ffe78a049e0 R15: 00007ffe78a04d40 [ 35.325076] [ 35.325367] [ 35.325583] Allocated by task 214: [ 35.326039] kasan_save_stack+0x22/0x50 [ 35.326550] kasan_set_track+0x25/0x30 [ 35.327048] __kasan_slab_alloc+0x59/0x70 [ 35.327568] kmem_cache_alloc+0x16b/0x370 [ 35.328082] vm_area_dup+0x20/0x160 [ 35.328540] __split_vma+0x170/0x950 [ 35.329009] split_vma+0xc6/0x110 [ 35.329448] mprotect_fixup+0x8d2/0xb30 [ 35.329959] do_mprotect_pkey+0x87e/0xd40 [ 35.330486] __x64_sys_mprotect+0x78/0xc0 [ 35.331015] do_syscall_64+0x3f/0x90 [ 35.331490] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.332130] [ 35.332342] Freed by task 214: [ 35.332756] kasan_save_stack+0x22/0x50 [ 35.333263] kasan_set_track+0x25/0x30 [ 35.333766] kasan_save_free_info+0x2b/0x50 [ 35.334315] __kasan_slab_free+0x10a/0x190 [ 35.334849] kmem_cache_free+0x10d/0x4d0 [ 35.335362] rcu_core+0x8c8/0x2860 [ 35.335821] __do_softirq+0x1b7/0x7d4 [ 35.336305] [ 35.336524] Last potentially related work creation: [ 35.337120] kasan_save_stack+0x22/0x50 [ 35.337629] __kasan_record_aux_stack+0x8e/0xa0 [ 35.338204] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.338859] remove_vma+0x139/0x170 [ 35.339317] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.339942] do_vmi_munmap+0x1f1/0x2b0 [ 35.340439] __vm_munmap+0x138/0x3a0 [ 35.340947] __x64_sys_munmap+0x59/0x80 [ 35.341452] do_syscall_64+0x3f/0x90 [ 35.341935] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.342610] [ 35.342832] Second to last potentially related work creation: [ 35.343522] kasan_save_stack+0x22/0x50 [ 35.344031] __kasan_record_aux_stack+0x8e/0xa0 [ 35.344620] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.345274] remove_vma+0x139/0x170 [ 35.345725] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.346279] do_vmi_munmap+0x1f1/0x2b0 [ 35.346772] mmap_region+0x1f9/0x2660 [ 35.347250] do_mmap+0x854/0xf00 [ 35.347681] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.348173] ksys_mmap_pgoff+0x3af/0x500 [ 35.348686] do_syscall_64+0x3f/0x90 [ 35.349169] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.349818] [ 35.350031] The buggy address belongs to the object at ffff88800e0390e8 [ 35.350031] which belongs to the cache vm_area_struct of size 168 [ 35.351495] The buggy address is located 88 bytes inside of [ 35.351495] freed 168-byte region [ffff88800e0390e8, ffff88800e039190) [ 35.352935] [ 35.353153] The buggy address belongs to the physical page: [ 35.353817] page:0000000010336bda refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe039 [ 35.354893] memcg:ffff88800eb6fb01 [ 35.355321] flags: 0x100000000000200(slab|node=0|zone=1) [ 35.355963] page_type: 0xffffffff() [ 35.356413] raw: 0100000000000200 ffff8880087a0c80 ffffea0000359080 dead000000000008 [ 35.357344] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800eb6fb01 [ 35.358242] page dumped because: kasan: bad access detected [ 35.358912] [ 35.359139] Memory state around the buggy address: [ 35.359723] ffff88800e039000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 35.360584] ffff88800e039080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 35.361439] >ffff88800e039100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.362292] ^ [ 35.362942] ffff88800e039180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.363800] ffff88800e039200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.364673] ================================================================== [ 35.365684] Disabling lock debugging due to kernel taint [ 39.016718] BUG: Bad rss-counter state mm:00000000a821ecb2 type:MM_FILEPAGES val:33 [ 39.017840] BUG: Bad rss-counter state mm:00000000a821ecb2 type:MM_ANONPAGES val:22 [ 39.494873] BUG: Bad rss-counter state mm:000000003d596b7c type:MM_FILEPAGES val:33 [ 39.496217] BUG: Bad rss-counter state mm:000000003d596b7c type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52368' (ECDSA) to the list of known hosts. 2023/06/21 00:05:36 fuzzer started 2023/06/21 00:05:36 dialing manager at localhost:36067 2023/06/21 00:05:36 checking machine... 2023/06/21 00:05:36 checking revisions... [ 40.251202] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:05:36 testing simple program... [ 40.307308] cgroup: Unknown subsys name 'net' [ 40.355315] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:05:36 Registers: info registers vcpu 0 RAX=ffffffff83635bd7 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff110013ffe89 RSI=ffffffff83635bd7 RDI=ffff888009fff4b8 RBP=ffff888009fff488 RSP=ffff888009fff3e8 R8 =0000000000000001 R9 =ffff888009fff430 R10=0000000000038001 R11=0000000000091afa R12=ffff888009fff4b8 R13=0000000000000000 R14=ffff88800daa0000 R15=0000000000000000 RIP=ffffffff813ad470 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 00007fb38fa20900 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=00007fb38ffd7618 CR3=0000000016818000 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=dffffc0000000000 RBX=ffffffff813ad720 RCX=ffff88801469fa50 RDX=1ffff110028d3f41 RSI=ffff88801469fa48 RDI=ffffffff813ad720 RBP=ffffffff813ad720 RSP=ffff88801469f958 R8 =0000000000000001 R9 =ffff88801469f9f0 R10=0000000000038001 R11=0000000000003c0d R12=0000000000000001 R13=0000000000000000 R14=ffff8880146a0000 R15=dffffc0000000000 RIP=ffffffff811fc771 RFL=00000283 [--S---C] 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 00007f5d33228900 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=00007f5d32667ff0 CR3=000000000c484000 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=ffd3af53efda28e700000000000ae988 XMM05=2120c682a91e83d40000000000133fa8 XMM06=e4cb8bb95a7664b60000000000132c68 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000