syzkaller login: [ 38.833326] BUG: Bad rss-counter state mm:0000000083c90267 type:MM_FILEPAGES val:33 [ 38.834514] BUG: Bad rss-counter state mm:0000000083c90267 type:MM_ANONPAGES val:22 [ 39.004086] ================================================================== [ 39.005058] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.006062] Read of size 8 at addr ffff88800eee3d08 by task sshd/227 [ 39.006860] [ 39.007182] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.008117] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.009201] Call Trace: [ 39.009531] [ 39.009824] dump_stack_lvl+0x91/0xf0 [ 39.010347] print_report+0xcc/0x620 [ 39.010868] ? __virt_addr_valid+0x102/0x340 [ 39.011459] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.012116] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.012760] kasan_report+0xbe/0xf0 [ 39.013286] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.013941] vma_interval_tree_remove+0xc75/0xec0 [ 39.014592] vma_prepare+0xc54/0x11a0 [ 39.015101] __split_vma+0x5af/0x950 [ 39.015593] ? __pfx___split_vma+0x10/0x10 [ 39.016160] ? find_held_lock+0x2c/0x110 [ 39.016699] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.017314] ? lock_is_held_type+0x9f/0x120 [ 39.017873] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.018525] ? mtree_range_walk+0x632/0x900 [ 39.019122] ? mas_walk+0x5c7/0x7c0 [ 39.019627] do_vmi_munmap+0x1f1/0x2b0 [ 39.020152] mmap_region+0x1f9/0x2660 [ 39.020673] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.021235] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.022006] ? __pfx_lock_acquire+0x10/0x10 [ 39.022572] ? __pfx_mmap_region+0x10/0x10 [ 39.023142] ? security_mmap_addr+0x7d/0xa0 [ 39.023703] ? get_unmapped_area+0x1f5/0x3f0 [ 39.024297] do_mmap+0x854/0xf00 [ 39.024754] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.025295] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.025875] ksys_mmap_pgoff+0x3af/0x500 [ 39.026410] do_syscall_64+0x3f/0x90 [ 39.026911] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.027585] RIP: 0033:0x7f6eba05ed82 [ 39.028095] 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 [ 39.030341] RSP: 002b:00007ffec27a6ff8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.031310] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6eba05ed82 [ 39.032193] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6eb9498000 [ 39.033126] RBP: 00007f6eb9498000 R08: 0000000000000009 R09: 0000000000001000 [ 39.034020] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557de78e7ec0 [ 39.034911] R13: 00007ffec27a7010 R14: 00007ffec27a7040 R15: 00007ffec27a73a0 [ 39.035837] [ 39.036143] [ 39.036365] Allocated by task 220: [ 39.036806] kasan_save_stack+0x22/0x50 [ 39.037352] kasan_set_track+0x25/0x30 [ 39.037868] __kasan_slab_alloc+0x59/0x70 [ 39.038425] kmem_cache_alloc+0x16b/0x370 [ 39.038965] vm_area_dup+0x20/0x160 [ 39.039440] __split_vma+0x170/0x950 [ 39.039927] split_vma+0xc6/0x110 [ 39.040398] mprotect_fixup+0x8d2/0xb30 [ 39.040937] do_mprotect_pkey+0x87e/0xd40 [ 39.041484] __x64_sys_mprotect+0x78/0xc0 [ 39.042034] do_syscall_64+0x3f/0x90 [ 39.042525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.043189] [ 39.043415] Freed by task 220: [ 39.043827] kasan_save_stack+0x22/0x50 [ 39.044346] kasan_set_track+0x25/0x30 [ 39.044871] kasan_save_free_info+0x2b/0x50 [ 39.045433] __kasan_slab_free+0x10a/0x190 [ 39.045978] kmem_cache_free+0x10d/0x4d0 [ 39.046519] rcu_core+0x8c8/0x2860 [ 39.046981] __do_softirq+0x1b7/0x7d4 [ 39.047477] [ 39.047695] Last potentially related work creation: [ 39.048313] kasan_save_stack+0x22/0x50 [ 39.048835] __kasan_record_aux_stack+0x8e/0xa0 [ 39.049437] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.050116] remove_vma+0x139/0x170 [ 39.050586] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.051168] do_vmi_munmap+0x1f1/0x2b0 [ 39.051668] __vm_munmap+0x138/0x3a0 [ 39.052147] __x64_sys_munmap+0x59/0x80 [ 39.052658] do_syscall_64+0x3f/0x90 [ 39.053158] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.053825] [ 39.054047] The buggy address belongs to the object at ffff88800eee3cb0 [ 39.054047] which belongs to the cache vm_area_struct of size 168 [ 39.055570] The buggy address is located 88 bytes inside of [ 39.055570] freed 168-byte region [ffff88800eee3cb0, ffff88800eee3d58) [ 39.057044] [ 39.057264] The buggy address belongs to the physical page: [ 39.057948] page:000000009c83e6d2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xeee3 [ 39.059066] memcg:ffff888018c82401 [ 39.059520] flags: 0x100000000000200(slab|node=0|zone=1) [ 39.060193] page_type: 0xffffffff() [ 39.060657] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 39.061611] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018c82401 [ 39.062531] page dumped because: kasan: bad access detected [ 39.063199] [ 39.063418] Memory state around the buggy address: [ 39.064005] ffff88800eee3c00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 39.064927] ffff88800eee3c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 39.065820] >ffff88800eee3d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 39.066710] ^ [ 39.067176] ffff88800eee3d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 39.068088] ffff88800eee3e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 39.069001] ================================================================== [ 39.070026] Disabling lock debugging due to kernel taint [ 40.939999] BUG: Bad rss-counter state mm:00000000867e0f7f type:MM_FILEPAGES val:33 [ 40.941074] BUG: Bad rss-counter state mm:00000000867e0f7f type:MM_ANONPAGES val:22 [ 41.419781] BUG: Bad rss-counter state mm:00000000928cceac type:MM_FILEPAGES val:33 [ 41.420798] BUG: Bad rss-counter state mm:00000000928cceac type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:11865' (ECDSA) to the list of known hosts. 2023/06/20 00:49:31 fuzzer started 2023/06/20 00:49:31 dialing manager at localhost:44161 2023/06/20 00:49:31 checking machine... 2023/06/20 00:49:31 checking revisions... [ 42.150934] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:49:31 testing simple program... [ 42.198996] cgroup: Unknown subsys name 'net' [ 42.245211] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:49:31 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=ffff888008c58000 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=00007f2b8ae786b0 CR3=0000000008eee000 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=2030333a39343a3030203032206e754a XMM01=73732878696e755f6d6170203a5d3633 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3633325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732030333a39343a3030203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff8880168088d0 RCX=ffffffff81370c98 RDX=fffffbfff0ba77db RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=0000000000000200 RSP=ffff88806cf09dc0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000001 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff81370ca0 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 00007f9631658900 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=0000561792c77954 CR3=0000000018c08000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000