syzkaller login: [ 31.662366] BUG: Bad rss-counter state mm:000000006f818abb type:MM_FILEPAGES val:33 [ 31.663562] BUG: Bad rss-counter state mm:000000006f818abb type:MM_ANONPAGES val:22 [ 31.707062] ================================================================== [ 31.708336] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.709393] Read of size 8 at addr ffff888019cde968 by task sshd/219 [ 31.710369] [ 31.710591] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.711658] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.712744] Call Trace: [ 31.713141] [ 31.713491] dump_stack_lvl+0x91/0xf0 [ 31.714124] print_report+0xcc/0x620 [ 31.714626] ? __virt_addr_valid+0x102/0x340 [ 31.715279] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716050] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.716836] kasan_report+0xbe/0xf0 [ 31.717313] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.717936] vma_interval_tree_remove+0xc75/0xec0 [ 31.718535] vma_prepare+0xc54/0x11a0 [ 31.719013] __split_vma+0x5af/0x950 [ 31.719487] ? __pfx___split_vma+0x10/0x10 [ 31.720093] ? find_held_lock+0x2c/0x110 [ 31.720648] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.721222] ? lock_is_held_type+0x9f/0x120 [ 31.721785] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.722428] ? mtree_range_walk+0x632/0x900 [ 31.723006] ? mas_walk+0x5c7/0x7c0 [ 31.723493] do_vmi_munmap+0x1f1/0x2b0 [ 31.724028] mmap_region+0x1f9/0x2660 [ 31.724555] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.725068] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.725793] ? __pfx_lock_acquire+0x10/0x10 [ 31.726329] ? __pfx_mmap_region+0x10/0x10 [ 31.726861] ? security_mmap_addr+0x7d/0xa0 [ 31.727396] ? get_unmapped_area+0x1f5/0x3f0 [ 31.727963] do_mmap+0x854/0xf00 [ 31.728402] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.728912] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.729479] ksys_mmap_pgoff+0x3af/0x500 [ 31.729994] do_syscall_64+0x3f/0x90 [ 31.730480] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.731138] RIP: 0033:0x7eff3bfc1d82 [ 31.731599] 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 [ 31.733752] RSP: 002b:00007ffe7eb22d08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.734650] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007eff3bfc1d82 [ 31.735492] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007eff3b3fb000 [ 31.736360] RBP: 00007eff3b3fb000 R08: 0000000000000009 R09: 0000000000001000 [ 31.737216] R10: 0000000000000812 R11: 0000000000000206 R12: 00005633e3f42980 [ 31.738071] R13: 00007ffe7eb22d20 R14: 00007ffe7eb22d50 R15: 00007ffe7eb230b0 [ 31.738939] [ 31.739233] [ 31.739446] Allocated by task 212: [ 31.739900] kasan_save_stack+0x22/0x50 [ 31.740416] kasan_set_track+0x25/0x30 [ 31.740919] __kasan_slab_alloc+0x59/0x70 [ 31.741434] kmem_cache_alloc+0x16b/0x370 [ 31.741949] vm_area_dup+0x20/0x160 [ 31.742412] __split_vma+0x170/0x950 [ 31.742889] split_vma+0xc6/0x110 [ 31.743332] mprotect_fixup+0x8d2/0xb30 [ 31.743848] do_mprotect_pkey+0x87e/0xd40 [ 31.744377] __x64_sys_mprotect+0x78/0xc0 [ 31.744913] do_syscall_64+0x3f/0x90 [ 31.745385] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.746026] [ 31.746241] Freed by task 19: [ 31.746623] kasan_save_stack+0x22/0x50 [ 31.747123] kasan_set_track+0x25/0x30 [ 31.747619] kasan_save_free_info+0x2b/0x50 [ 31.748177] __kasan_slab_free+0x10a/0x190 [ 31.748712] kmem_cache_free+0x10d/0x4d0 [ 31.749225] rcu_core+0x8c8/0x2860 [ 31.749671] __do_softirq+0x1b7/0x7d4 [ 31.750147] [ 31.750364] Last potentially related work creation: [ 31.750950] kasan_save_stack+0x22/0x50 [ 31.751454] __kasan_record_aux_stack+0x8e/0xa0 [ 31.752039] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.752749] remove_vma+0x139/0x170 [ 31.753202] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.753760] do_vmi_munmap+0x1f1/0x2b0 [ 31.754247] __vm_munmap+0x138/0x3a0 [ 31.754715] __x64_sys_munmap+0x59/0x80 [ 31.755215] do_syscall_64+0x3f/0x90 [ 31.755693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.756348] [ 31.756563] The buggy address belongs to the object at ffff888019cde910 [ 31.756563] which belongs to the cache vm_area_struct of size 168 [ 31.758048] The buggy address is located 88 bytes inside of [ 31.758048] freed 168-byte region [ffff888019cde910, ffff888019cde9b8) [ 31.759440] [ 31.759653] The buggy address belongs to the physical page: [ 31.760321] page:00000000dab20f37 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19cde [ 31.761406] memcg:ffff88800c79cf01 [ 31.761832] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.762523] page_type: 0xffffffff() [ 31.762992] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.763953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c79cf01 [ 31.764890] page dumped because: kasan: bad access detected [ 31.765583] [ 31.765797] Memory state around the buggy address: [ 31.766403] ffff888019cde800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.767300] ffff888019cde880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.768157] >ffff888019cde900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.769005] ^ [ 31.769774] ffff888019cde980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 31.770640] ffff888019cdea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.771554] ================================================================== [ 31.772549] Disabling lock debugging due to kernel taint [ 33.513989] BUG: Bad rss-counter state mm:00000000c03d7c38 type:MM_FILEPAGES val:33 [ 33.515166] BUG: Bad rss-counter state mm:00000000c03d7c38 type:MM_ANONPAGES val:22 [ 33.899724] BUG: Bad rss-counter state mm:00000000ac561f25 type:MM_FILEPAGES val:33 [ 33.900898] BUG: Bad rss-counter state mm:00000000ac561f25 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:55845' (ECDSA) to the list of known hosts. 2023/06/20 21:26:38 fuzzer started 2023/06/20 21:26:38 dialing manager at localhost:36067 2023/06/20 21:26:38 checking machine... 2023/06/20 21:26:38 checking revisions... [ 34.390223] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:26:38 testing simple program... [ 34.429418] cgroup: Unknown subsys name 'net' [ 34.481451] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:26:38 Registers: info registers vcpu 0 RAX=ffffffff81741318 RBX=0000000000000007 RCX=0000000000000001 RDX=0000000000000800 RSI=000000000000000b RDI=ffff888019d7f2e8 RBP=dffffc0000000000 RSP=ffff888019d7f200 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=000000000000000b R13=0000000000000800 R14=ffff888019d7f2b0 R15=ffff88800e581390 RIP=ffffffff813ad649 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 00007f2e50216900 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=00007f2e501f5020 CR3=00000000099cc000 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=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 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=00007fcd60ee25f0 CR3=00000000096e6000 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=fcdbb93da1e94db47449fb06f645c5c9 XMM02=ec2efd57dc4c00df000000000011a840 XMM03=4ec8db7d005b443a000000000011a910 XMM04=957fcd6ec1cde79b00000000000ae988 XMM05=dfcdbad4f1609c370000000000132078 XMM06=6264ae1b8d7d840f0000000000130ee0 XMM07=e042d86d42eb936e0000000000122478 XMM08=4ec8db7d005b443a000000000011a910 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000