syzkaller login: [ 30.833168] BUG: Bad rss-counter state mm:00000000142b9d5f type:MM_FILEPAGES val:33 [ 30.835375] BUG: Bad rss-counter state mm:00000000142b9d5f type:MM_ANONPAGES val:22 [ 31.025076] ================================================================== [ 31.026053] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.027041] Read of size 8 at addr ffff88800ea6bdf0 by task sshd/222 [ 31.027971] [ 31.028201] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.029115] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.030149] Call Trace: [ 31.030487] [ 31.030786] dump_stack_lvl+0x91/0xf0 [ 31.031304] print_report+0xcc/0x620 [ 31.031826] ? __virt_addr_valid+0x102/0x340 [ 31.032410] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.033061] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.033705] kasan_report+0xbe/0xf0 [ 31.034212] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.034863] vma_interval_tree_remove+0xc75/0xec0 [ 31.035517] vma_prepare+0xc54/0x11a0 [ 31.036030] __split_vma+0x5af/0x950 [ 31.036530] ? __pfx___split_vma+0x10/0x10 [ 31.037100] ? find_held_lock+0x2c/0x110 [ 31.037652] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.038248] ? lock_is_held_type+0x9f/0x120 [ 31.038829] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.039479] ? mtree_range_walk+0x632/0x900 [ 31.040060] ? mas_walk+0x5c7/0x7c0 [ 31.040563] do_vmi_munmap+0x1f1/0x2b0 [ 31.041081] mmap_region+0x1f9/0x2660 [ 31.041589] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.042128] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.042880] ? __pfx_lock_acquire+0x10/0x10 [ 31.043437] ? __pfx_mmap_region+0x10/0x10 [ 31.044028] ? security_mmap_addr+0x7d/0xa0 [ 31.044596] ? get_unmapped_area+0x1f5/0x3f0 [ 31.045183] do_mmap+0x854/0xf00 [ 31.045649] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.046172] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.046775] ksys_mmap_pgoff+0x3af/0x500 [ 31.047314] do_syscall_64+0x3f/0x90 [ 31.047830] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.048515] RIP: 0033:0x7f99ba409d82 [ 31.048996] 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 [ 31.051240] RSP: 002b:00007ffedb7338c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.052204] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f99ba409d82 [ 31.053103] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f99b9843000 [ 31.053997] RBP: 00007f99b9843000 R08: 0000000000000009 R09: 0000000000001000 [ 31.054892] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560c9f080f70 [ 31.055799] R13: 00007ffedb7338e0 R14: 00007ffedb733910 R15: 00007ffedb733c70 [ 31.056705] [ 31.057012] [ 31.057240] Allocated by task 215: [ 31.057698] kasan_save_stack+0x22/0x50 [ 31.058231] kasan_set_track+0x25/0x30 [ 31.058757] __kasan_slab_alloc+0x59/0x70 [ 31.059313] kmem_cache_alloc+0x16b/0x370 [ 31.059868] vm_area_dup+0x20/0x160 [ 31.060349] __split_vma+0x170/0x950 [ 31.060839] split_vma+0xc6/0x110 [ 31.061304] mprotect_fixup+0x8d2/0xb30 [ 31.061836] do_mprotect_pkey+0x87e/0xd40 [ 31.062385] __x64_sys_mprotect+0x78/0xc0 [ 31.062938] do_syscall_64+0x3f/0x90 [ 31.063440] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064145] [ 31.064377] Freed by task 204: [ 31.064794] kasan_save_stack+0x22/0x50 [ 31.065324] kasan_set_track+0x25/0x30 [ 31.065846] kasan_save_free_info+0x2b/0x50 [ 31.066405] __kasan_slab_free+0x10a/0x190 [ 31.066971] kmem_cache_free+0x10d/0x4d0 [ 31.067513] rcu_core+0x8c8/0x2860 [ 31.067986] __do_softirq+0x1b7/0x7d4 [ 31.068492] [ 31.068719] Last potentially related work creation: [ 31.069340] kasan_save_stack+0x22/0x50 [ 31.069873] __kasan_record_aux_stack+0x8e/0xa0 [ 31.070476] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.071158] remove_vma+0x139/0x170 [ 31.071759] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.072450] do_vmi_munmap+0x1f1/0x2b0 [ 31.073037] __vm_munmap+0x138/0x3a0 [ 31.073605] __x64_sys_munmap+0x59/0x80 [ 31.074203] do_syscall_64+0x3f/0x90 [ 31.074781] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.075603] [ 31.075864] Second to last potentially related work creation: [ 31.076702] kasan_save_stack+0x22/0x50 [ 31.077312] __kasan_record_aux_stack+0x8e/0xa0 [ 31.078003] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.078780] remove_vma+0x139/0x170 [ 31.079331] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.080012] do_vmi_munmap+0x1f1/0x2b0 [ 31.080602] mmap_region+0x1f9/0x2660 [ 31.081176] do_mmap+0x854/0xf00 [ 31.081697] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.082283] ksys_mmap_pgoff+0x3af/0x500 [ 31.082894] do_syscall_64+0x3f/0x90 [ 31.083477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.084258] [ 31.084519] The buggy address belongs to the object at ffff88800ea6bd98 [ 31.084519] which belongs to the cache vm_area_struct of size 168 [ 31.086302] The buggy address is located 88 bytes inside of [ 31.086302] freed 168-byte region [ffff88800ea6bd98, ffff88800ea6be40) [ 31.088005] [ 31.088222] The buggy address belongs to the physical page: [ 31.088877] page:00000000300a66e5 refcount:1 mapcount:0 mapping:0000000000000000 index:0xffff88800ea6bcb0 pfn:0xea6b [ 31.090089] memcg:ffff88800e54ba01 [ 31.090513] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.091149] page_type: 0xffffffff() [ 31.091605] raw: 0100000000000200 ffff8880087a0c80 ffffea000039cd80 dead000000000004 [ 31.092511] raw: ffff88800ea6bcb0 0000000080110006 00000001ffffffff ffff88800e54ba01 [ 31.093430] page dumped because: kasan: bad access detected [ 31.094095] [ 31.094306] Memory state around the buggy address: [ 31.094879] ffff88800ea6bc80: fc fc fc fc fc fc fb fb fb fb fb fb fb fb fb fb [ 31.095733] ffff88800ea6bd00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 31.096576] >ffff88800ea6bd80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 31.097413] ^ [ 31.098213] ffff88800ea6be00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 31.099062] ffff88800ea6be80: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.099918] ================================================================== [ 31.101052] Disabling lock debugging due to kernel taint [ 33.379098] BUG: Bad rss-counter state mm:00000000573062b6 type:MM_FILEPAGES val:33 [ 33.380365] BUG: Bad rss-counter state mm:00000000573062b6 type:MM_ANONPAGES val:22 [ 33.918105] BUG: Bad rss-counter state mm:000000008456bf08 type:MM_FILEPAGES val:33 [ 33.919291] BUG: Bad rss-counter state mm:000000008456bf08 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62389' (ECDSA) to the list of known hosts. 2023/06/20 14:14:38 fuzzer started 2023/06/20 14:14:38 dialing manager at localhost:36067 2023/06/20 14:14:38 checking machine... 2023/06/20 14:14:38 checking revisions... [ 34.662545] kmemleak: Automatic memory scanning thread ended 2023/06/20 14:14:38 testing simple program... [ 34.703913] cgroup: Unknown subsys name 'net' [ 34.800402] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:14:38 Registers: info registers vcpu 0 RAX=0000000000000003 RBX=ffff8880102ac720 RCX=1ffffffff0ba7c92 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff81810711 RBP=ffff88800844f780 RSP=ffff88806ce09e08 R8 =0000000000000000 R9 =0000000000000000 R10=ffffffff85d3d357 R11=0000000000000000 R12=0000000000000200 R13=0000000000000001 R14=ffffffff813782f8 R15=ffff8880102ac7a0 RIP=ffffffff81810713 RFL=00000246 [---Z-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 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=00007ffe25a34ff8 CR3=000000000c7b0000 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=2038333a34313a3431203032206e754a XMM01=657463656e6e6f63736944203a5d3133 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3133325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037333a34313a3431203032 XMM08=69767265733d7373616c63742030733a XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff863b7f8e RBX=0000000000000001 RCX=ffffffff8366a63b RDX=0000000000000000 RSI=ffffffff863b7f8e RDI=ffffffff85fa80c8 RBP=ffffffff85fa80cc RSP=ffff888018fef0b8 R8 =ffffffff863b7f8e R9 =ffff888018fef198 R10=0000000000038001 R11=000000000008b5c1 R12=ffffffff85fa80c8 R13=ffffffff85fa80c8 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcb8 RFL=00000282 [--S----] 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 00007f9d93858900 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=00007f9d93e0f618 CR3=000000000e686000 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=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