syzkaller login: [ 30.639728] BUG: Bad rss-counter state mm:00000000e647a615 type:MM_FILEPAGES val:33 [ 30.641510] BUG: Bad rss-counter state mm:00000000e647a615 type:MM_ANONPAGES val:22 [ 30.798215] ================================================================== [ 30.799128] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.800059] Read of size 8 at addr ffff88800f1866b0 by task sshd/222 [ 30.800834] [ 30.801052] CPU: 0 PID: 222 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.802041] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.803012] Call Trace: [ 30.803356] [ 30.803641] dump_stack_lvl+0x91/0xf0 [ 30.804139] print_report+0xcc/0x620 [ 30.804628] ? __virt_addr_valid+0x102/0x340 [ 30.805188] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.805816] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.806426] kasan_report+0xbe/0xf0 [ 30.806904] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.807533] vma_interval_tree_remove+0xc75/0xec0 [ 30.808149] vma_prepare+0xc54/0x11a0 [ 30.808638] __split_vma+0x5af/0x950 [ 30.809106] ? __pfx___split_vma+0x10/0x10 [ 30.809648] ? find_held_lock+0x2c/0x110 [ 30.810170] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.810738] ? lock_is_held_type+0x9f/0x120 [ 30.811278] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.811886] ? mtree_range_walk+0x632/0x900 [ 30.812440] ? mas_walk+0x5c7/0x7c0 [ 30.812920] do_vmi_munmap+0x1f1/0x2b0 [ 30.813415] mmap_region+0x1f9/0x2660 [ 30.813926] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.814435] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.815152] ? __pfx_lock_acquire+0x10/0x10 [ 30.815700] ? __pfx_mmap_region+0x10/0x10 [ 30.816231] ? security_mmap_addr+0x7d/0xa0 [ 30.816759] ? get_unmapped_area+0x1f5/0x3f0 [ 30.817310] do_mmap+0x854/0xf00 [ 30.817760] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.818263] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.818831] ksys_mmap_pgoff+0x3af/0x500 [ 30.819340] do_syscall_64+0x3f/0x90 [ 30.819818] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.820480] RIP: 0033:0x7fb895d23d82 [ 30.820942] 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 [ 30.823114] RSP: 002b:00007ffc8d75cf38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.824029] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fb895d23d82 [ 30.824876] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fb89515d000 [ 30.825766] RBP: 00007fb89515d000 R08: 0000000000000009 R09: 0000000000001000 [ 30.826652] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae00f33ec0 [ 30.827554] R13: 00007ffc8d75cf50 R14: 00007ffc8d75cf80 R15: 00007ffc8d75d2e0 [ 30.828422] [ 30.828726] [ 30.828944] Allocated by task 215: [ 30.829398] kasan_save_stack+0x22/0x50 [ 30.829934] kasan_set_track+0x25/0x30 [ 30.830422] __kasan_slab_alloc+0x59/0x70 [ 30.830953] kmem_cache_alloc+0x16b/0x370 [ 30.831483] vm_area_dup+0x20/0x160 [ 30.831940] __split_vma+0x170/0x950 [ 30.832409] split_vma+0xc6/0x110 [ 30.832846] mprotect_fixup+0x8d2/0xb30 [ 30.833354] do_mprotect_pkey+0x87e/0xd40 [ 30.833890] __x64_sys_mprotect+0x78/0xc0 [ 30.834411] do_syscall_64+0x3f/0x90 [ 30.834894] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.835536] [ 30.835755] Freed by task 215: [ 30.836151] kasan_save_stack+0x22/0x50 [ 30.836661] kasan_set_track+0x25/0x30 [ 30.837159] kasan_save_free_info+0x2b/0x50 [ 30.837710] __kasan_slab_free+0x10a/0x190 [ 30.838252] kmem_cache_free+0x10d/0x4d0 [ 30.838770] rcu_core+0x8c8/0x2860 [ 30.839221] __do_softirq+0x1b7/0x7d4 [ 30.839704] [ 30.839927] Last potentially related work creation: [ 30.840519] kasan_save_stack+0x22/0x50 [ 30.841024] __kasan_record_aux_stack+0x8e/0xa0 [ 30.841614] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.842259] remove_vma+0x139/0x170 [ 30.842713] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.843271] do_vmi_munmap+0x1f1/0x2b0 [ 30.843784] __vm_munmap+0x138/0x3a0 [ 30.844261] __x64_sys_munmap+0x59/0x80 [ 30.844761] do_syscall_64+0x3f/0x90 [ 30.845238] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.845910] [ 30.846128] The buggy address belongs to the object at ffff88800f186658 [ 30.846128] which belongs to the cache vm_area_struct of size 168 [ 30.847629] The buggy address is located 88 bytes inside of [ 30.847629] freed 168-byte region [ffff88800f186658, ffff88800f186700) [ 30.849092] [ 30.849311] The buggy address belongs to the physical page: [ 30.849999] page:000000002185c603 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf186 [ 30.851105] memcg:ffff88801a1db601 [ 30.851534] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.852182] page_type: 0xffffffff() [ 30.852638] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.853589] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801a1db601 [ 30.854507] page dumped because: kasan: bad access detected [ 30.855178] [ 30.855394] Memory state around the buggy address: [ 30.855989] ffff88800f186580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.856850] ffff88800f186600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.857713] >ffff88800f186680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.858558] ^ [ 30.859147] ffff88800f186700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 30.860016] ffff88800f186780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 30.860863] ================================================================== [ 30.861873] Disabling lock debugging due to kernel taint [ 32.786420] BUG: Bad rss-counter state mm:00000000019a4372 type:MM_FILEPAGES val:33 [ 32.787627] BUG: Bad rss-counter state mm:00000000019a4372 type:MM_ANONPAGES val:22 [ 33.264971] BUG: Bad rss-counter state mm:00000000205e7dd6 type:MM_FILEPAGES val:33 [ 33.266159] BUG: Bad rss-counter state mm:00000000205e7dd6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3711' (ECDSA) to the list of known hosts. 2023/06/20 13:01:44 fuzzer started 2023/06/20 13:01:44 dialing manager at localhost:36067 2023/06/20 13:01:44 checking machine... 2023/06/20 13:01:44 checking revisions... [ 33.913420] kmemleak: Automatic memory scanning thread ended 2023/06/20 13:01:44 testing simple program... [ 33.958945] cgroup: Unknown subsys name 'net' [ 33.995557] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:01:44 Registers: info registers vcpu 0 RAX=ffffffff863b2b1b RBX=0000000000000001 RCX=ffffffff863b2b16 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880164bfa00 RSP=ffff8880164bf938 R8 =ffffffff863b2b1a R9 =ffff8880164bf9e8 R10=0000000000038001 R11=000000000008a79f R12=ffff8880164bfa08 R13=ffff8880164bf9f0 R14=ffff8880164bfdc0 R15=ffff8880164bf9a8 RIP=ffffffff81131134 RFL=00000293 [--S-A-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 00007f9f99fe3900 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=00007f9f9a59b0b0 CR3=000000000f048000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=ffff888008c04400 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=00007f9f9a598650 CR3=000000001a0a6000 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=2033343a31303a3331203032206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033343a31303a3331203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000