syzkaller login: [ 40.224755] BUG: Bad rss-counter state mm:000000003c2df9d9 type:MM_FILEPAGES val:33 [ 40.225985] BUG: Bad rss-counter state mm:000000003c2df9d9 type:MM_ANONPAGES val:22 [ 40.267160] ================================================================== [ 40.268244] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 40.269533] Read of size 8 at addr ffff88800c635798 by task sshd/220 [ 40.270723] [ 40.271006] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 40.272072] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 40.273214] Call Trace: [ 40.273545] [ 40.273863] dump_stack_lvl+0x91/0xf0 [ 40.274365] print_report+0xcc/0x620 [ 40.274863] ? __virt_addr_valid+0x102/0x340 [ 40.275427] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.276081] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.276704] kasan_report+0xbe/0xf0 [ 40.277217] ? vma_interval_tree_remove+0xc75/0xec0 [ 40.277865] vma_interval_tree_remove+0xc75/0xec0 [ 40.278470] vma_prepare+0xc54/0x11a0 [ 40.278965] __split_vma+0x5af/0x950 [ 40.279437] ? __pfx___split_vma+0x10/0x10 [ 40.279991] ? find_held_lock+0x2c/0x110 [ 40.280517] do_vmi_align_munmap+0x2ba/0x11f0 [ 40.281127] ? lock_is_held_type+0x9f/0x120 [ 40.281685] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 40.282322] ? mtree_range_walk+0x632/0x900 [ 40.282892] ? mas_walk+0x5c7/0x7c0 [ 40.283369] do_vmi_munmap+0x1f1/0x2b0 [ 40.283876] mmap_region+0x1f9/0x2660 [ 40.284369] ? vm_mmap_pgoff+0x15c/0x3a0 [ 40.284911] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 40.285639] ? __pfx_lock_acquire+0x10/0x10 [ 40.286198] ? __pfx_mmap_region+0x10/0x10 [ 40.286735] ? security_mmap_addr+0x7d/0xa0 [ 40.287282] ? get_unmapped_area+0x1f5/0x3f0 [ 40.287866] do_mmap+0x854/0xf00 [ 40.288308] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.288825] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 40.289417] ksys_mmap_pgoff+0x3af/0x500 [ 40.289963] do_syscall_64+0x3f/0x90 [ 40.290449] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.291121] RIP: 0033:0x7f25e04d3d82 [ 40.291584] 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 [ 40.293833] RSP: 002b:00007ffe7ba5dbd8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 40.294742] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f25e04d3d82 [ 40.295626] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f25df90d000 [ 40.296490] RBP: 00007f25df90d000 R08: 0000000000000009 R09: 0000000000001000 [ 40.297383] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563dcf57eec0 [ 40.298255] R13: 00007ffe7ba5dbf0 R14: 00007ffe7ba5dc20 R15: 00007ffe7ba5df80 [ 40.299137] [ 40.299428] [ 40.299650] Allocated by task 213: [ 40.300090] kasan_save_stack+0x22/0x50 [ 40.300599] kasan_set_track+0x25/0x30 [ 40.301140] __kasan_slab_alloc+0x59/0x70 [ 40.301670] kmem_cache_alloc+0x16b/0x370 [ 40.302217] vm_area_dup+0x20/0x160 [ 40.302673] __split_vma+0x170/0x950 [ 40.303173] split_vma+0xc6/0x110 [ 40.303627] mprotect_fixup+0x8d2/0xb30 [ 40.304140] do_mprotect_pkey+0x87e/0xd40 [ 40.304679] __x64_sys_mprotect+0x78/0xc0 [ 40.305245] do_syscall_64+0x3f/0x90 [ 40.305717] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.306401] [ 40.306614] Freed by task 213: [ 40.307031] kasan_save_stack+0x22/0x50 [ 40.307548] kasan_set_track+0x25/0x30 [ 40.308056] kasan_save_free_info+0x2b/0x50 [ 40.308603] __kasan_slab_free+0x10a/0x190 [ 40.309161] kmem_cache_free+0x10d/0x4d0 [ 40.309677] rcu_core+0x8c8/0x2860 [ 40.310160] __do_softirq+0x1b7/0x7d4 [ 40.310661] [ 40.310937] Last potentially related work creation: [ 40.311674] kasan_save_stack+0x22/0x50 [ 40.312195] __kasan_record_aux_stack+0x8e/0xa0 [ 40.312801] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.313483] remove_vma+0x139/0x170 [ 40.313966] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.314529] do_vmi_munmap+0x1f1/0x2b0 [ 40.315033] __vm_munmap+0x138/0x3a0 [ 40.315504] __x64_sys_munmap+0x59/0x80 [ 40.316024] do_syscall_64+0x3f/0x90 [ 40.316518] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.317195] [ 40.317409] Second to last potentially related work creation: [ 40.318117] kasan_save_stack+0x22/0x50 [ 40.318621] __kasan_record_aux_stack+0x8e/0xa0 [ 40.319218] __call_rcu_common.constprop.0+0x6a/0xb90 [ 40.319892] remove_vma+0x139/0x170 [ 40.320344] do_vmi_align_munmap+0xd4a/0x11f0 [ 40.320925] do_vmi_munmap+0x1f1/0x2b0 [ 40.321429] mmap_region+0x1f9/0x2660 [ 40.321948] do_mmap+0x854/0xf00 [ 40.322396] vm_mmap_pgoff+0x1a6/0x3a0 [ 40.322908] ksys_mmap_pgoff+0x3af/0x500 [ 40.323415] do_syscall_64+0x3f/0x90 [ 40.323915] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 40.324560] [ 40.324793] The buggy address belongs to the object at ffff88800c635740 [ 40.324793] which belongs to the cache vm_area_struct of size 168 [ 40.326322] The buggy address is located 88 bytes inside of [ 40.326322] freed 168-byte region [ffff88800c635740, ffff88800c6357e8) [ 40.327766] [ 40.327988] The buggy address belongs to the physical page: [ 40.328654] page:0000000070d20492 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc635 [ 40.329787] memcg:ffff88800ea24b01 [ 40.330224] flags: 0x100000000000200(slab|node=0|zone=1) [ 40.330889] page_type: 0xffffffff() [ 40.331338] raw: 0100000000000200 ffff88800879fc80 ffffea0000395e40 dead000000000006 [ 40.332275] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ea24b01 [ 40.333207] page dumped because: kasan: bad access detected [ 40.333897] [ 40.334112] Memory state around the buggy address: [ 40.334707] ffff88800c635680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 40.335590] ffff88800c635700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 40.336467] >ffff88800c635780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 40.337365] ^ [ 40.337886] ffff88800c635800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 40.338754] ffff88800c635880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 40.339617] ================================================================== [ 40.340537] Disabling lock debugging due to kernel taint [ 42.314771] BUG: Bad rss-counter state mm:000000008d5ac0d3 type:MM_FILEPAGES val:33 [ 42.315974] BUG: Bad rss-counter state mm:000000008d5ac0d3 type:MM_ANONPAGES val:22 [ 42.742857] BUG: Bad rss-counter state mm:00000000a7a78959 type:MM_FILEPAGES val:33 [ 42.743832] BUG: Bad rss-counter state mm:00000000a7a78959 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14123' (ECDSA) to the list of known hosts. 2023/06/19 20:26:29 fuzzer started 2023/06/19 20:26:30 dialing manager at localhost:44161 2023/06/19 20:26:30 checking machine... 2023/06/19 20:26:30 checking revisions... [ 43.534265] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:26:30 testing simple program... [ 43.584200] cgroup: Unknown subsys name 'net' [ 43.637358] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:26:28 Registers: info registers vcpu 0 RAX=ffff88800c4fe198 RBX=0000000000000000 RCX=1ffff11001bc01b0 RDX=dffffc0000000000 RSI=ffffffff87b86f80 RDI=ffff88800de00d80 RBP=ffff88800de00d78 RSP=ffff88800c61fcf8 R8 =0000000000000001 R9 =ffffed10018c3f97 R10=0000000000000003 R11=00000000000b6cb2 R12=0000000000000283 R13=ffff88800d2aad78 R14=ffff88800de00d78 R15=ffffffff87b86f80 RIP=ffffffff844cc6fa RFL=00000046 [---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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f4421579900 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=00007ffe4b7f3000 CR3=000000000f03e000 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=0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a0a XMM01=000000000000ff000000000000000000 XMM02=ffffffffffffff00ffff000000000000 XMM03=726f66203337373839322320646e6120 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffff0000ffffffffffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=ffff888008c58400 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=00007f1407ae3000 CR3=000000000d5b0000 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=f611affb8777a8a0f44d771c56f13a57 XMM02=000000000011cce8eff9b2d0a8fce9cb XMM03=000000000011cdb82c67c8bc2e329bc3 XMM04=4dcd7073f6191fa500000000000ae988 XMM05=19e9129bd510f2350000000000134710 XMM06=e2124e473b8dc41500000000001338e8 XMM07=e042d86d42eb936e0000000000123d80 XMM08=48febfa29b9c7845000000000011cdb8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000