syzkaller login: [ 43.454933] BUG: Bad rss-counter state mm:0000000032fb8ba4 type:MM_FILEPAGES val:33 [ 43.456068] BUG: Bad rss-counter state mm:0000000032fb8ba4 type:MM_ANONPAGES val:22 [ 43.635415] ================================================================== [ 43.636427] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 43.637470] Read of size 8 at addr ffff88800e083310 by task sshd/220 [ 43.638675] [ 43.638919] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 43.639877] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 43.641005] Call Trace: [ 43.641372] [ 43.641699] dump_stack_lvl+0x91/0xf0 [ 43.642232] print_report+0xcc/0x620 [ 43.642774] ? __virt_addr_valid+0x102/0x340 [ 43.643380] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.644111] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.644803] kasan_report+0xbe/0xf0 [ 43.645335] ? vma_interval_tree_remove+0xc75/0xec0 [ 43.646021] vma_interval_tree_remove+0xc75/0xec0 [ 43.646706] vma_prepare+0xc54/0x11a0 [ 43.647242] __split_vma+0x5af/0x950 [ 43.647772] ? __pfx___split_vma+0x10/0x10 [ 43.648364] ? find_held_lock+0x2c/0x110 [ 43.648955] do_vmi_align_munmap+0x2ba/0x11f0 [ 43.649623] ? lock_is_held_type+0x9f/0x120 [ 43.650236] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 43.650920] ? mtree_range_walk+0x632/0x900 [ 43.651539] ? mas_walk+0x5c7/0x7c0 [ 43.652074] do_vmi_munmap+0x1f1/0x2b0 [ 43.652634] mmap_region+0x1f9/0x2660 [ 43.653193] ? vm_mmap_pgoff+0x15c/0x3a0 [ 43.653770] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 43.654581] ? __pfx_lock_acquire+0x10/0x10 [ 43.655182] ? __pfx_mmap_region+0x10/0x10 [ 43.655777] ? security_mmap_addr+0x7d/0xa0 [ 43.656383] ? get_unmapped_area+0x1f5/0x3f0 [ 43.657012] do_mmap+0x854/0xf00 [ 43.657531] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.658099] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 43.658741] ksys_mmap_pgoff+0x3af/0x500 [ 43.659314] do_syscall_64+0x3f/0x90 [ 43.659854] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.660588] RIP: 0033:0x7f761d5a3d82 [ 43.661120] 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 [ 43.663486] RSP: 002b:00007ffd81aa4428 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 43.664466] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f761d5a3d82 [ 43.665404] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f761c9dd000 [ 43.666331] RBP: 00007f761c9dd000 R08: 0000000000000009 R09: 0000000000001000 [ 43.667248] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564127f09ec0 [ 43.668178] R13: 00007ffd81aa4440 R14: 00007ffd81aa4470 R15: 00007ffd81aa47d0 [ 43.669150] [ 43.669468] [ 43.669704] Allocated by task 213: [ 43.670166] kasan_save_stack+0x22/0x50 [ 43.670731] kasan_set_track+0x25/0x30 [ 43.671285] __kasan_slab_alloc+0x59/0x70 [ 43.671871] kmem_cache_alloc+0x16b/0x370 [ 43.672453] vm_area_dup+0x20/0x160 [ 43.672957] __split_vma+0x170/0x950 [ 43.673485] split_vma+0xc6/0x110 [ 43.673971] mprotect_fixup+0x8d2/0xb30 [ 43.674544] do_mprotect_pkey+0x87e/0xd40 [ 43.675128] __x64_sys_mprotect+0x78/0xc0 [ 43.675700] do_syscall_64+0x3f/0x90 [ 43.676228] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.676936] [ 43.677189] Freed by task 200: [ 43.677642] kasan_save_stack+0x22/0x50 [ 43.678205] kasan_set_track+0x25/0x30 [ 43.678764] kasan_save_free_info+0x2b/0x50 [ 43.679430] __kasan_slab_free+0x10a/0x190 [ 43.680025] kmem_cache_free+0x10d/0x4d0 [ 43.680621] rcu_core+0x8c8/0x2860 [ 43.681172] __do_softirq+0x1b7/0x7d4 [ 43.681717] [ 43.681962] Last potentially related work creation: [ 43.682639] kasan_save_stack+0x22/0x50 [ 43.683222] __kasan_record_aux_stack+0x8e/0xa0 [ 43.683889] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.684630] remove_vma+0x139/0x170 [ 43.685155] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.685799] do_vmi_munmap+0x1f1/0x2b0 [ 43.686353] __vm_munmap+0x138/0x3a0 [ 43.686892] __x64_sys_munmap+0x59/0x80 [ 43.687467] do_syscall_64+0x3f/0x90 [ 43.688011] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.688749] [ 43.688992] Second to last potentially related work creation: [ 43.689808] kasan_save_stack+0x22/0x50 [ 43.690389] __kasan_record_aux_stack+0x8e/0xa0 [ 43.691044] __call_rcu_common.constprop.0+0x6a/0xb90 [ 43.691796] remove_vma+0x139/0x170 [ 43.692316] do_vmi_align_munmap+0xd4a/0x11f0 [ 43.692958] do_vmi_munmap+0x1f1/0x2b0 [ 43.693527] mmap_region+0x1f9/0x2660 [ 43.694077] do_mmap+0x854/0xf00 [ 43.694576] vm_mmap_pgoff+0x1a6/0x3a0 [ 43.695138] ksys_mmap_pgoff+0x3af/0x500 [ 43.695716] do_syscall_64+0x3f/0x90 [ 43.696262] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 43.696998] [ 43.697262] The buggy address belongs to the object at ffff88800e0832b8 [ 43.697262] which belongs to the cache vm_area_struct of size 168 [ 43.698976] The buggy address is located 88 bytes inside of [ 43.698976] freed 168-byte region [ffff88800e0832b8, ffff88800e083360) [ 43.700603] [ 43.700853] The buggy address belongs to the physical page: [ 43.701627] page:000000003e6c1d85 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe083 [ 43.702878] memcg:ffff88800cfd3c01 [ 43.703367] flags: 0x100000000000200(slab|node=0|zone=1) [ 43.704104] page_type: 0xffffffff() [ 43.704620] raw: 0100000000000200 ffff88800879fc80 ffffea0000397ac0 dead000000000006 [ 43.705687] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cfd3c01 [ 43.706725] page dumped because: kasan: bad access detected [ 43.707479] [ 43.707723] Memory state around the buggy address: [ 43.708381] ffff88800e083200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 43.709367] ffff88800e083280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 43.710344] >ffff88800e083300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 43.711322] ^ [ 43.711857] ffff88800e083380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 43.712837] ffff88800e083400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 43.713809] ================================================================== [ 43.715030] Disabling lock debugging due to kernel taint [ 46.211021] BUG: Bad rss-counter state mm:0000000030dc5224 type:MM_FILEPAGES val:33 [ 46.212205] BUG: Bad rss-counter state mm:0000000030dc5224 type:MM_ANONPAGES val:22 [ 46.591232] BUG: Bad rss-counter state mm:000000000755750d type:MM_FILEPAGES val:33 [ 46.591996] BUG: Bad rss-counter state mm:000000000755750d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44530' (ECDSA) to the list of known hosts. 2023/06/20 06:22:39 fuzzer started 2023/06/20 06:22:39 dialing manager at localhost:44161 2023/06/20 06:22:39 checking machine... 2023/06/20 06:22:39 checking revisions... [ 47.329112] kmemleak: Automatic memory scanning thread ended 2023/06/20 06:22:39 testing simple program... [ 47.367240] cgroup: Unknown subsys name 'net' [ 47.403292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:22:27 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81f4dfa8 RDX=ffff888015c3d1c0 RSI=0000000000000001 RDI=0000000000000000 RBP=ffff88801691fc38 RSP=ffff88801691fa50 R8 =0000000000000005 R9 =000000000000017f R10=0000000000000005 R11=0000000000000000 R12=ffff888008f67808 R13=ffff88801691fc3c R14=00000000000002f1 R15=0000000000001032 RIP=ffffffff814c0388 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 00007fe5054f7900 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=00007ffd1b3ff000 CR3=000000001689e000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=00007f5dd0ea3100 CR3=000000000e768000 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=ff2d96a70de7ffadcc450b6a0ba01aad XMM02=000000000011c9e8eff9b2d0a8fce9cb XMM03=000000000011cab82c67c8bc2e329bc3 XMM04=de3b7b3377bd351c00000000000ae988 XMM05=ba18c1eb7ea9024600000000001363f0 XMM06=4fda316b135da52b0000000000135490 XMM07=e042d86d42eb936e0000000000124948 XMM08=a3b00d3cd87970d5000000000011cab8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000