syzkaller login: [ 34.240072] BUG: Bad rss-counter state mm:000000007b2ddc3c type:MM_FILEPAGES val:33 [ 34.241550] BUG: Bad rss-counter state mm:000000007b2ddc3c type:MM_ANONPAGES val:22 [ 34.283247] ================================================================== [ 34.284224] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.285165] Read of size 8 at addr ffff888015a14d08 by task sshd/219 [ 34.286023] [ 34.286303] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.287275] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.288236] Call Trace: [ 34.288552] [ 34.288837] dump_stack_lvl+0x91/0xf0 [ 34.289323] print_report+0xcc/0x620 [ 34.289816] ? __virt_addr_valid+0x102/0x340 [ 34.290362] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.290971] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.291579] kasan_report+0xbe/0xf0 [ 34.292058] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.292674] vma_interval_tree_remove+0xc75/0xec0 [ 34.293269] vma_prepare+0xc54/0x11a0 [ 34.293759] __split_vma+0x5af/0x950 [ 34.294236] ? __pfx___split_vma+0x10/0x10 [ 34.294765] ? find_held_lock+0x2c/0x110 [ 34.295287] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.295842] ? lock_is_held_type+0x9f/0x120 [ 34.296376] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.296975] ? mtree_range_walk+0x632/0x900 [ 34.297524] ? mas_walk+0x5c7/0x7c0 [ 34.298028] do_vmi_munmap+0x1f1/0x2b0 [ 34.298521] mmap_region+0x1f9/0x2660 [ 34.299000] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.299511] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.300219] ? __pfx_lock_acquire+0x10/0x10 [ 34.300750] ? __pfx_mmap_region+0x10/0x10 [ 34.301283] ? security_mmap_addr+0x7d/0xa0 [ 34.301834] ? get_unmapped_area+0x1f5/0x3f0 [ 34.302376] do_mmap+0x854/0xf00 [ 34.302812] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.303309] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.303865] ksys_mmap_pgoff+0x3af/0x500 [ 34.304366] do_syscall_64+0x3f/0x90 [ 34.304845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.305496] RIP: 0033:0x7f6010b71d82 [ 34.305961] 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 [ 34.308089] RSP: 002b:00007ffca74c0018 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.309158] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6010b71d82 [ 34.310022] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f600ffab000 [ 34.310876] RBP: 00007f600ffab000 R08: 0000000000000009 R09: 0000000000001000 [ 34.311732] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560cd1d67ec0 [ 34.312576] R13: 00007ffca74c0030 R14: 00007ffca74c0060 R15: 00007ffca74c03c0 [ 34.313438] [ 34.313742] [ 34.313957] Allocated by task 212: [ 34.314384] kasan_save_stack+0x22/0x50 [ 34.314895] kasan_set_track+0x25/0x30 [ 34.315390] __kasan_slab_alloc+0x59/0x70 [ 34.315917] kmem_cache_alloc+0x16b/0x370 [ 34.316437] vm_area_dup+0x20/0x160 [ 34.316889] __split_vma+0x170/0x950 [ 34.317351] split_vma+0xc6/0x110 [ 34.317836] mprotect_fixup+0x8d2/0xb30 [ 34.318340] do_mprotect_pkey+0x87e/0xd40 [ 34.318854] __x64_sys_mprotect+0x78/0xc0 [ 34.319378] do_syscall_64+0x3f/0x90 [ 34.319847] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.320483] [ 34.320695] Freed by task 212: [ 34.321085] kasan_save_stack+0x22/0x50 [ 34.321587] kasan_set_track+0x25/0x30 [ 34.322093] kasan_save_free_info+0x2b/0x50 [ 34.322623] __kasan_slab_free+0x10a/0x190 [ 34.323153] kmem_cache_free+0x10d/0x4d0 [ 34.323656] rcu_core+0x8c8/0x2860 [ 34.324097] __do_softirq+0x1b7/0x7d4 [ 34.324574] [ 34.324788] Last potentially related work creation: [ 34.325372] kasan_save_stack+0x22/0x50 [ 34.325882] __kasan_record_aux_stack+0x8e/0xa0 [ 34.326454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.327092] remove_vma+0x139/0x170 [ 34.327542] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.328103] do_vmi_munmap+0x1f1/0x2b0 [ 34.328583] __vm_munmap+0x138/0x3a0 [ 34.329047] __x64_sys_munmap+0x59/0x80 [ 34.329539] do_syscall_64+0x3f/0x90 [ 34.330031] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.330675] [ 34.330895] The buggy address belongs to the object at ffff888015a14cb0 [ 34.330895] which belongs to the cache vm_area_struct of size 168 [ 34.332356] The buggy address is located 88 bytes inside of [ 34.332356] freed 168-byte region [ffff888015a14cb0, ffff888015a14d58) [ 34.333775] [ 34.333988] The buggy address belongs to the physical page: [ 34.334645] page:00000000abbf180d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15a14 [ 34.335725] memcg:ffff888019d7b701 [ 34.336154] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.336803] page_type: 0xffffffff() [ 34.337261] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.338195] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019d7b701 [ 34.339098] page dumped because: kasan: bad access detected [ 34.339759] [ 34.339973] Memory state around the buggy address: [ 34.340564] ffff888015a14c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 34.341432] ffff888015a14c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 34.342302] >ffff888015a14d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 34.343148] ^ [ 34.343588] ffff888015a14d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 34.344454] ffff888015a14e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 34.345304] ================================================================== [ 34.346344] Disabling lock debugging due to kernel taint [ 36.826535] BUG: Bad rss-counter state mm:00000000e545a47a type:MM_FILEPAGES val:33 [ 36.828044] BUG: Bad rss-counter state mm:00000000e545a47a type:MM_ANONPAGES val:22 [ 37.300737] BUG: Bad rss-counter state mm:00000000542134a8 type:MM_FILEPAGES val:33 [ 37.301984] BUG: Bad rss-counter state mm:00000000542134a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41788' (ECDSA) to the list of known hosts. 2023/06/19 23:18:57 fuzzer started 2023/06/19 23:18:57 dialing manager at localhost:44161 2023/06/19 23:18:57 checking machine... 2023/06/19 23:18:57 checking revisions... [ 38.004201] kmemleak: Automatic memory scanning thread ended 2023/06/19 23:18:58 testing simple program... [ 38.056154] cgroup: Unknown subsys name 'net' [ 38.099609] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 23:18:54 Registers: info registers vcpu 0 RAX=ffffed100338fcc8 RBX=ffffed100338fec0 RCX=ffffffff8226ff67 RDX=00000000000001f8 RSI=0000000000000fe0 RDI=ffff888019c7e620 RBP=ffffed100338fcc4 RSP=ffff8880147d7d00 R8 =0000000000000001 R9 =ffffed100338febf R10=ffff888019c7f5ff R11=000000000000003f R12=0000000000000004 R13=ffff888019c7e620 R14=00007f9dea164b31 R15=ffffffff85d3ce80 RIP=ffffffff8180ef53 RFL=00000206 [-----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 00007f9dea189900 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=00007ffea875b000 CR3=000000000c534000 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=635f6e6f69737365733a4d41503d706f XMM01=6f6c5f6d61702c78756e696c65735f6d XMM02=61702c74696d7265705f6d61702c7469 XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f6eb87e6000 CR3=000000000caf8000 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=f31df86d16c17fb883420c9c2a5dd0c3 XMM02=000000000011c818eff9b2d0a8fce9cb XMM03=000000000011c8e82c67c8bc2e329bc3 XMM04=ef382700832f01e600000000000ae988 XMM05=dfcdbad4f1609c3700000000001339e8 XMM06=806171799158d9670000000000133870 XMM07=e042d86d42eb936e0000000000124080 XMM08=afc219325a0600e2000000000011c8e8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000