syzkaller login: [ 31.351871] BUG: Bad rss-counter state mm:000000003d39ba73 type:MM_FILEPAGES val:33 [ 31.353163] BUG: Bad rss-counter state mm:000000003d39ba73 type:MM_ANONPAGES val:22 [ 31.394776] ================================================================== [ 31.395795] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.396803] Read of size 8 at addr ffff8880090d9228 by task sshd/219 [ 31.397668] [ 31.397913] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.398885] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.399949] Call Trace: [ 31.400291] [ 31.400602] dump_stack_lvl+0x91/0xf0 [ 31.401125] print_report+0xcc/0x620 [ 31.401644] ? __virt_addr_valid+0x102/0x340 [ 31.402247] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.402911] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.403571] kasan_report+0xbe/0xf0 [ 31.404081] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.404752] vma_interval_tree_remove+0xc75/0xec0 [ 31.405403] vma_prepare+0xc54/0x11a0 [ 31.405920] __split_vma+0x5af/0x950 [ 31.406447] ? __pfx___split_vma+0x10/0x10 [ 31.407018] ? find_held_lock+0x2c/0x110 [ 31.407581] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.408197] ? lock_is_held_type+0x9f/0x120 [ 31.408776] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.409434] ? mtree_range_walk+0x632/0x900 [ 31.410036] ? mas_walk+0x5c7/0x7c0 [ 31.410563] do_vmi_munmap+0x1f1/0x2b0 [ 31.411099] mmap_region+0x1f9/0x2660 [ 31.411615] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.412168] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.412939] ? __pfx_lock_acquire+0x10/0x10 [ 31.413515] ? __pfx_mmap_region+0x10/0x10 [ 31.414109] ? security_mmap_addr+0x7d/0xa0 [ 31.414689] ? get_unmapped_area+0x1f5/0x3f0 [ 31.415290] do_mmap+0x854/0xf00 [ 31.415766] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.416303] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.416922] ksys_mmap_pgoff+0x3af/0x500 [ 31.417475] do_syscall_64+0x3f/0x90 [ 31.418001] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.418720] RIP: 0033:0x7f9b0c550d82 [ 31.419224] 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 [ 31.421696] RSP: 002b:00007ffff55597a8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.422702] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9b0c550d82 [ 31.423613] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9b0b98a000 [ 31.424527] RBP: 00007f9b0b98a000 R08: 0000000000000009 R09: 0000000000001000 [ 31.425448] R10: 0000000000000812 R11: 0000000000000206 R12: 000055adc447fd90 [ 31.426369] R13: 00007ffff55597c0 R14: 00007ffff55597f0 R15: 00007ffff5559b50 [ 31.427307] [ 31.427627] [ 31.427860] Allocated by task 212: [ 31.428329] kasan_save_stack+0x22/0x50 [ 31.428883] kasan_set_track+0x25/0x30 [ 31.429422] __kasan_slab_alloc+0x59/0x70 [ 31.429991] kmem_cache_alloc+0x16b/0x370 [ 31.430643] vm_area_dup+0x20/0x160 [ 31.431143] __split_vma+0x170/0x950 [ 31.431646] split_vma+0xc6/0x110 [ 31.432125] mprotect_fixup+0x8d2/0xb30 [ 31.432677] do_mprotect_pkey+0x87e/0xd40 [ 31.433246] __x64_sys_mprotect+0x78/0xc0 [ 31.433820] do_syscall_64+0x3f/0x90 [ 31.434350] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.435048] [ 31.435281] Freed by task 19: [ 31.435700] kasan_save_stack+0x22/0x50 [ 31.436252] kasan_set_track+0x25/0x30 [ 31.436789] kasan_save_free_info+0x2b/0x50 [ 31.437365] __kasan_slab_free+0x10a/0x190 [ 31.437942] kmem_cache_free+0x10d/0x4d0 [ 31.438502] rcu_core+0x8c8/0x2860 [ 31.438983] __do_softirq+0x1b7/0x7d4 [ 31.439508] [ 31.439743] Last potentially related work creation: [ 31.440382] kasan_save_stack+0x22/0x50 [ 31.440932] __kasan_record_aux_stack+0x8e/0xa0 [ 31.441562] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.442279] remove_vma+0x139/0x170 [ 31.442774] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.443379] do_vmi_munmap+0x1f1/0x2b0 [ 31.443900] __vm_munmap+0x138/0x3a0 [ 31.444409] __x64_sys_munmap+0x59/0x80 [ 31.444955] do_syscall_64+0x3f/0x90 [ 31.445479] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.446202] [ 31.446438] The buggy address belongs to the object at ffff8880090d91d0 [ 31.446438] which belongs to the cache vm_area_struct of size 168 [ 31.448040] The buggy address is located 88 bytes inside of [ 31.448040] freed 168-byte region [ffff8880090d91d0, ffff8880090d9278) [ 31.449575] [ 31.449809] The buggy address belongs to the physical page: [ 31.450529] page:00000000bd9afd42 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x90d9 [ 31.451714] memcg:ffff88800e8e0401 [ 31.452179] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.452882] page_type: 0xffffffff() [ 31.453373] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.454418] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e8e0401 [ 31.455408] page dumped because: kasan: bad access detected [ 31.456135] [ 31.456369] Memory state around the buggy address: [ 31.457004] ffff8880090d9100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.457947] ffff8880090d9180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.458892] >ffff8880090d9200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.459821] ^ [ 31.460432] ffff8880090d9280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 31.461375] ffff8880090d9300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 31.462312] ================================================================== [ 31.463548] Disabling lock debugging due to kernel taint [ 33.288131] BUG: Bad rss-counter state mm:00000000cebd5cde type:MM_FILEPAGES val:33 [ 33.289559] BUG: Bad rss-counter state mm:00000000cebd5cde type:MM_ANONPAGES val:22 [ 33.735569] BUG: Bad rss-counter state mm:0000000087371ea1 type:MM_FILEPAGES val:33 [ 33.736312] BUG: Bad rss-counter state mm:0000000087371ea1 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:19172' (ECDSA) to the list of known hosts. 2023/06/21 06:24:32 fuzzer started 2023/06/21 06:24:32 dialing manager at localhost:36067 2023/06/21 06:24:32 checking machine... 2023/06/21 06:24:32 checking revisions... [ 34.349005] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:24:32 testing simple program... [ 34.382887] cgroup: Unknown subsys name 'net' [ 34.418841] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:24:32 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=00007f9ff89a0560 CR3=000000000eb4c000 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=2032333a34323a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032333a34323a3630203132 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8173f809 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100d9e135e RSI=ffffffff8173f809 RDI=ffff88806cf09b60 RBP=ffff88806cf09b30 RSP=ffff88806cf09a90 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b3db4 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff8880102051c0 R15=ffff88800974d7a0 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 00007f3057eec900 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=00007f3057ea5008 CR3=000000000e3aa000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000