syzkaller login: [ 31.072626] BUG: Bad rss-counter state mm:00000000289f70e5 type:MM_FILEPAGES val:33 [ 31.073697] BUG: Bad rss-counter state mm:00000000289f70e5 type:MM_ANONPAGES val:22 [ 31.235227] ================================================================== [ 31.236140] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.237076] Read of size 8 at addr ffff8880147415c8 by task sshd/219 [ 31.237845] [ 31.238183] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.239158] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.240137] Call Trace: [ 31.240454] <TASK> [ 31.240738] dump_stack_lvl+0x91/0xf0 [ 31.241239] print_report+0xcc/0x620 [ 31.241739] ? __virt_addr_valid+0x102/0x340 [ 31.242305] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.242934] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.243545] kasan_report+0xbe/0xf0 [ 31.244033] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.244654] vma_interval_tree_remove+0xc75/0xec0 [ 31.245269] vma_prepare+0xc54/0x11a0 [ 31.245749] __split_vma+0x5af/0x950 [ 31.246226] ? __pfx___split_vma+0x10/0x10 [ 31.246753] ? find_held_lock+0x2c/0x110 [ 31.247287] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.247850] ? lock_is_held_type+0x9f/0x120 [ 31.248395] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.249006] ? mtree_range_walk+0x632/0x900 [ 31.249569] ? mas_walk+0x5c7/0x7c0 [ 31.250045] do_vmi_munmap+0x1f1/0x2b0 [ 31.250551] mmap_region+0x1f9/0x2660 [ 31.251071] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.251592] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.252305] ? __pfx_lock_acquire+0x10/0x10 [ 31.252846] ? __pfx_mmap_region+0x10/0x10 [ 31.253383] ? security_mmap_addr+0x7d/0xa0 [ 31.253931] ? get_unmapped_area+0x1f5/0x3f0 [ 31.254488] do_mmap+0x854/0xf00 [ 31.254945] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.255438] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.256009] ksys_mmap_pgoff+0x3af/0x500 [ 31.256513] do_syscall_64+0x3f/0x90 [ 31.256995] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.257661] RIP: 0033:0x7fe995881d82 [ 31.258125] 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 [ 31.260293] RSP: 002b:00007ffcc2da1268 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.261214] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe995881d82 [ 31.262073] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe994cbb000 [ 31.262948] RBP: 00007fe994cbb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.263818] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e762dfcb20 [ 31.264669] R13: 00007ffcc2da1280 R14: 00007ffcc2da12b0 R15: 00007ffcc2da1610 [ 31.265548] </TASK> [ 31.265840] [ 31.266070] Allocated by task 212: [ 31.266513] kasan_save_stack+0x22/0x50 [ 31.267025] kasan_set_track+0x25/0x30 [ 31.267531] __kasan_slab_alloc+0x59/0x70 [ 31.268078] kmem_cache_alloc+0x16b/0x370 [ 31.268602] vm_area_dup+0x20/0x160 [ 31.269058] __split_vma+0x170/0x950 [ 31.269532] split_vma+0xc6/0x110 [ 31.269973] mprotect_fixup+0x8d2/0xb30 [ 31.270478] do_mprotect_pkey+0x87e/0xd40 [ 31.271008] __x64_sys_mprotect+0x78/0xc0 [ 31.271530] do_syscall_64+0x3f/0x90 [ 31.272005] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.272651] [ 31.272869] Freed by task 202: [ 31.273265] kasan_save_stack+0x22/0x50 [ 31.273766] kasan_set_track+0x25/0x30 [ 31.274258] kasan_save_free_info+0x2b/0x50 [ 31.274797] __kasan_slab_free+0x10a/0x190 [ 31.275343] kmem_cache_free+0x10d/0x4d0 [ 31.275857] rcu_core+0x8c8/0x2860 [ 31.276310] __do_softirq+0x1b7/0x7d4 [ 31.276791] [ 31.277005] Last potentially related work creation: [ 31.277590] kasan_save_stack+0x22/0x50 [ 31.278102] __kasan_record_aux_stack+0x8e/0xa0 [ 31.278676] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.279403] remove_vma+0x139/0x170 [ 31.279871] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.280432] do_vmi_munmap+0x1f1/0x2b0 [ 31.280925] __vm_munmap+0x138/0x3a0 [ 31.281396] __x64_sys_munmap+0x59/0x80 [ 31.281891] do_syscall_64+0x3f/0x90 [ 31.282371] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.283042] [ 31.283260] The buggy address belongs to the object at ffff888014741570 [ 31.283260] which belongs to the cache vm_area_struct of size 168 [ 31.284757] The buggy address is located 88 bytes inside of [ 31.284757] freed 168-byte region [ffff888014741570, ffff888014741618) [ 31.286190] [ 31.286404] The buggy address belongs to the physical page: [ 31.287087] page:0000000048459bb4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14741 [ 31.288226] memcg:ffff888017f71501 [ 31.288652] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.289346] page_type: 0xffffffff() [ 31.289830] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.290767] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888017f71501 [ 31.291697] page dumped because: kasan: bad access detected [ 31.292374] [ 31.292592] Memory state around the buggy address: [ 31.293183] ffff888014741480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.294047] ffff888014741500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 31.294918] >ffff888014741580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.295777] ^ [ 31.296451] ffff888014741600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 31.297302] ffff888014741680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.298181] ================================================================== [ 31.299152] Disabling lock debugging due to kernel taint [ 33.409658] BUG: Bad rss-counter state mm:00000000d1448d72 type:MM_FILEPAGES val:33 [ 33.410809] BUG: Bad rss-counter state mm:00000000d1448d72 type:MM_ANONPAGES val:22 [ 33.824001] BUG: Bad rss-counter state mm:0000000003286bb2 type:MM_FILEPAGES val:33 [ 33.825058] BUG: Bad rss-counter state mm:0000000003286bb2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42806' (ECDSA) to the list of known hosts. 2023/06/20 12:27:33 fuzzer started 2023/06/20 12:27:33 dialing manager at localhost:36067 2023/06/20 12:27:33 checking machine... 2023/06/20 12:27:33 checking revisions... [ 34.503789] kmemleak: Automatic memory scanning thread ended 2023/06/20 12:27:33 testing simple program... [ 34.548319] cgroup: Unknown subsys name 'net' [ 34.599577] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:27:33 Registers: info registers vcpu 0 RAX=000000000000000e RBX=ffffed1002f9ff26 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000000 RDI=ffffffff85d3d350 RBP=ffff88800844f780 RSP=ffff888017cff930 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000092cc0 R13=0000000000092cc0 R14=0000000000000000 R15=0000000000092cc0 RIP=ffffffff813ad740 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 00007fddb2431900 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=00007fddb29e90b0 CR3=000000001a722000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 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 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=00007ff72f965408 CR3=000000000d6ce000 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=899702602a3199b0ef435ecf84963443 XMM02=000000000011a5d0ec2efd57dc4c00df XMM03=0000000000121a38f736ea18ece01597 XMM04=47f0422e7fc1e3d600000000000ae988 XMM05=c63c99c372c795200000000000131d00 XMM06=806171799158d96700000000001316f8 XMM07=e042d86d42eb936e0000000000121cb8 XMM08=f736ea18ece01597000000000011a630 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000