syzkaller login: [ 51.809228] BUG: Bad rss-counter state mm:00000000112176ac type:MM_FILEPAGES val:33 [ 51.810119] BUG: Bad rss-counter state mm:00000000112176ac type:MM_ANONPAGES val:22 [ 51.972533] ================================================================== [ 51.973719] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 51.974961] Read of size 8 at addr ffff88800ef64b38 by task sshd/219 [ 51.975747] [ 51.975969] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 51.976827] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 51.977826] Call Trace: [ 51.978157] [ 51.978444] dump_stack_lvl+0x91/0xf0 [ 51.978954] print_report+0xcc/0x620 [ 51.979462] ? __virt_addr_valid+0x102/0x340 [ 51.980015] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.980650] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.981269] kasan_report+0xbe/0xf0 [ 51.981748] ? vma_interval_tree_remove+0xc75/0xec0 [ 51.982369] vma_interval_tree_remove+0xc75/0xec0 [ 51.982982] vma_prepare+0xc54/0x11a0 [ 51.983481] __split_vma+0x5af/0x950 [ 51.983959] ? __pfx___split_vma+0x10/0x10 [ 51.984490] ? find_held_lock+0x2c/0x110 [ 51.985024] do_vmi_align_munmap+0x2ba/0x11f0 [ 51.985595] ? lock_is_held_type+0x9f/0x120 [ 51.986131] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 51.986745] ? mtree_range_walk+0x632/0x900 [ 51.987302] ? mas_walk+0x5c7/0x7c0 [ 51.987788] do_vmi_munmap+0x1f1/0x2b0 [ 51.988288] mmap_region+0x1f9/0x2660 [ 51.988769] ? vm_mmap_pgoff+0x15c/0x3a0 [ 51.989284] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 51.989997] ? __pfx_lock_acquire+0x10/0x10 [ 51.990524] ? __pfx_mmap_region+0x10/0x10 [ 51.991054] ? security_mmap_addr+0x7d/0xa0 [ 51.991634] ? get_unmapped_area+0x1f5/0x3f0 [ 51.992190] do_mmap+0x854/0xf00 [ 51.992631] vm_mmap_pgoff+0x1a6/0x3a0 [ 51.993146] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 51.993714] ksys_mmap_pgoff+0x3af/0x500 [ 51.994224] do_syscall_64+0x3f/0x90 [ 51.994703] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 51.995348] RIP: 0033:0x7faa26ef5d82 [ 51.995814] 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 [ 51.997933] RSP: 002b:00007ffe1fc694c8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 51.998841] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007faa26ef5d82 [ 51.999691] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007faa2632f000 [ 52.000528] RBP: 00007faa2632f000 R08: 0000000000000009 R09: 0000000000001000 [ 52.001386] R10: 0000000000000812 R11: 0000000000000206 R12: 0000564aa1518ec0 [ 52.002232] R13: 00007ffe1fc694e0 R14: 00007ffe1fc69510 R15: 00007ffe1fc69870 [ 52.003091] [ 52.003382] [ 52.003617] Allocated by task 212: [ 52.004050] kasan_save_stack+0x22/0x50 [ 52.004555] kasan_set_track+0x25/0x30 [ 52.005051] __kasan_slab_alloc+0x59/0x70 [ 52.005573] kmem_cache_alloc+0x16b/0x370 [ 52.006091] vm_area_dup+0x20/0x160 [ 52.006543] __split_vma+0x170/0x950 [ 52.007008] split_vma+0xc6/0x110 [ 52.007453] mprotect_fixup+0x8d2/0xb30 [ 52.007954] do_mprotect_pkey+0x87e/0xd40 [ 52.008476] __x64_sys_mprotect+0x78/0xc0 [ 52.009005] do_syscall_64+0x3f/0x90 [ 52.009477] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.010117] [ 52.010333] Freed by task 212: [ 52.010725] kasan_save_stack+0x22/0x50 [ 52.011227] kasan_set_track+0x25/0x30 [ 52.011729] kasan_save_free_info+0x2b/0x50 [ 52.012263] __kasan_slab_free+0x10a/0x190 [ 52.012801] kmem_cache_free+0x10d/0x4d0 [ 52.013307] rcu_core+0x8c8/0x2860 [ 52.013759] __do_softirq+0x1b7/0x7d4 [ 52.014232] [ 52.014449] Last potentially related work creation: [ 52.015034] kasan_save_stack+0x22/0x50 [ 52.015554] __kasan_record_aux_stack+0x8e/0xa0 [ 52.016131] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.016775] remove_vma+0x139/0x170 [ 52.017225] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.017787] do_vmi_munmap+0x1f1/0x2b0 [ 52.018274] __vm_munmap+0x138/0x3a0 [ 52.018745] __x64_sys_munmap+0x59/0x80 [ 52.019238] do_syscall_64+0x3f/0x90 [ 52.019720] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.020357] [ 52.020574] Second to last potentially related work creation: [ 52.021252] kasan_save_stack+0x22/0x50 [ 52.021754] __kasan_record_aux_stack+0x8e/0xa0 [ 52.022324] __call_rcu_common.constprop.0+0x6a/0xb90 [ 52.022973] remove_vma+0x139/0x170 [ 52.023446] do_vmi_align_munmap+0xd4a/0x11f0 [ 52.024009] do_vmi_munmap+0x1f1/0x2b0 [ 52.024510] mmap_region+0x1f9/0x2660 [ 52.025004] do_mmap+0x854/0xf00 [ 52.025444] vm_mmap_pgoff+0x1a6/0x3a0 [ 52.025950] ksys_mmap_pgoff+0x3af/0x500 [ 52.026468] do_syscall_64+0x3f/0x90 [ 52.026963] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 52.027646] [ 52.027868] The buggy address belongs to the object at ffff88800ef64ae0 [ 52.027868] which belongs to the cache vm_area_struct of size 168 [ 52.029369] The buggy address is located 88 bytes inside of [ 52.029369] freed 168-byte region [ffff88800ef64ae0, ffff88800ef64b88) [ 52.030821] [ 52.031044] The buggy address belongs to the physical page: [ 52.031733] page:00000000a450e6d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xef64 [ 52.032936] memcg:ffff888018fc0701 [ 52.033378] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 52.034125] page_type: 0xffffffff() [ 52.034584] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 52.035529] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018fc0701 [ 52.036468] page dumped because: kasan: bad access detected [ 52.037144] [ 52.037362] Memory state around the buggy address: [ 52.037956] ffff88800ef64a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 52.038859] ffff88800ef64a80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 52.039762] >ffff88800ef64b00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 52.040625] ^ [ 52.041247] ffff88800ef64b80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 52.042134] ffff88800ef64c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 52.043042] ================================================================== [ 52.044069] Disabling lock debugging due to kernel taint [ 54.065464] BUG: Bad rss-counter state mm:000000002186a1ac type:MM_FILEPAGES val:33 [ 54.066686] BUG: Bad rss-counter state mm:000000002186a1ac type:MM_ANONPAGES val:22 [ 54.547422] BUG: Bad rss-counter state mm:000000009d324edb type:MM_FILEPAGES val:33 [ 54.548735] BUG: Bad rss-counter state mm:000000009d324edb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:33247' (ECDSA) to the list of known hosts. 2023/06/19 17:18:42 fuzzer started 2023/06/19 17:18:42 dialing manager at localhost:44161 2023/06/19 17:18:42 checking machine... 2023/06/19 17:18:42 checking revisions... [ 55.260608] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:18:42 testing simple program... [ 55.312203] cgroup: Unknown subsys name 'net' [ 55.352621] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:18:28 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffffb0da5e8 CR3=0000000005482000 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=00007f0bc4cd7510000055e551979790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff8153425b RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffffffff8452fffc RSP=ffff88806cf09db8 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000287 R13=ffff88800c9772a8 R14=ffffffff818d9dc6 R15=ffff88800cb31a80 RIP=ffffffff81534263 RFL=00000047 [---Z-PC] 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 00007fa51b698700 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=00007fc42c1f5790 CR3=000000000c4aa000 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=2031343a38313a3731203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a38313a3731203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000