syzkaller login: [ 38.858053] BUG: Bad rss-counter state mm:000000000801a29c type:MM_FILEPAGES val:33 [ 38.858947] BUG: Bad rss-counter state mm:000000000801a29c type:MM_ANONPAGES val:22 [ 38.989796] ================================================================== [ 38.990501] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.991225] Read of size 8 at addr ffff88800d6365c8 by task sshd/220 [ 38.991843] [ 38.992004] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.992665] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.993394] Call Trace: [ 38.993639] [ 38.993855] dump_stack_lvl+0x91/0xf0 [ 38.994231] print_report+0xcc/0x620 [ 38.994683] ? __virt_addr_valid+0x102/0x340 [ 38.995104] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.995577] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.996063] kasan_report+0xbe/0xf0 [ 38.996424] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.996914] vma_interval_tree_remove+0xc75/0xec0 [ 38.997377] vma_prepare+0xc54/0x11a0 [ 38.997751] __split_vma+0x5af/0x950 [ 38.998111] ? __pfx___split_vma+0x10/0x10 [ 38.998517] ? find_held_lock+0x2c/0x110 [ 38.998922] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.999355] ? lock_is_held_type+0x9f/0x120 [ 38.999785] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.000249] ? mtree_range_walk+0x632/0x900 [ 39.000673] ? mas_walk+0x5c7/0x7c0 [ 39.001035] do_vmi_munmap+0x1f1/0x2b0 [ 39.001415] mmap_region+0x1f9/0x2660 [ 39.001782] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.002175] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.002723] ? __pfx_lock_acquire+0x10/0x10 [ 39.003131] ? __pfx_mmap_region+0x10/0x10 [ 39.003540] ? security_mmap_addr+0x7d/0xa0 [ 39.003961] ? get_unmapped_area+0x1f5/0x3f0 [ 39.004389] do_mmap+0x854/0xf00 [ 39.004724] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.005109] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.005554] ksys_mmap_pgoff+0x3af/0x500 [ 39.005942] do_syscall_64+0x3f/0x90 [ 39.006312] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.006806] RIP: 0033:0x7f0b59823d82 [ 39.007161] 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 [ 39.008822] RSP: 002b:00007ffcaff11098 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.009516] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f0b59823d82 [ 39.010171] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0b58c5d000 [ 39.010824] RBP: 00007f0b58c5d000 R08: 0000000000000009 R09: 0000000000001000 [ 39.011481] R10: 0000000000000812 R11: 0000000000000206 R12: 000056197500ed90 [ 39.012145] R13: 00007ffcaff110b0 R14: 00007ffcaff110e0 R15: 00007ffcaff11440 [ 39.012798] [ 39.013021] [ 39.013188] Allocated by task 213: [ 39.013518] kasan_save_stack+0x22/0x50 [ 39.013900] kasan_set_track+0x25/0x30 [ 39.014282] __kasan_slab_alloc+0x59/0x70 [ 39.014688] kmem_cache_alloc+0x16b/0x370 [ 39.015083] vm_area_dup+0x20/0x160 [ 39.015429] __split_vma+0x170/0x950 [ 39.015802] split_vma+0xc6/0x110 [ 39.016138] mprotect_fixup+0x8d2/0xb30 [ 39.016522] do_mprotect_pkey+0x87e/0xd40 [ 39.016917] __x64_sys_mprotect+0x78/0xc0 [ 39.017319] do_syscall_64+0x3f/0x90 [ 39.017684] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.018171] [ 39.018332] Freed by task 213: [ 39.018632] kasan_save_stack+0x22/0x50 [ 39.019015] kasan_set_track+0x25/0x30 [ 39.019391] kasan_save_free_info+0x2b/0x50 [ 39.019820] __kasan_slab_free+0x10a/0x190 [ 39.020226] kmem_cache_free+0x10d/0x4d0 [ 39.020617] rcu_core+0x8c8/0x2860 [ 39.020954] __do_softirq+0x1b7/0x7d4 [ 39.021323] [ 39.021488] Last potentially related work creation: [ 39.021937] kasan_save_stack+0x22/0x50 [ 39.022323] __kasan_record_aux_stack+0x8e/0xa0 [ 39.022765] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.023264] remove_vma+0x139/0x170 [ 39.023624] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.024047] do_vmi_munmap+0x1f1/0x2b0 [ 39.024422] __vm_munmap+0x138/0x3a0 [ 39.024784] __x64_sys_munmap+0x59/0x80 [ 39.025161] do_syscall_64+0x3f/0x90 [ 39.025525] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.026014] [ 39.026179] Second to last potentially related work creation: [ 39.026707] kasan_save_stack+0x22/0x50 [ 39.027097] __kasan_record_aux_stack+0x8e/0xa0 [ 39.027542] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.028040] remove_vma+0x139/0x170 [ 39.028389] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.028817] do_vmi_munmap+0x1f1/0x2b0 [ 39.029190] mmap_region+0x1f9/0x2660 [ 39.029554] do_mmap+0x854/0xf00 [ 39.029890] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.030269] ksys_mmap_pgoff+0x3af/0x500 [ 39.030655] do_syscall_64+0x3f/0x90 [ 39.031014] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.031512] [ 39.031694] The buggy address belongs to the object at ffff88800d636570 [ 39.031694] which belongs to the cache vm_area_struct of size 168 [ 39.032827] The buggy address is located 88 bytes inside of [ 39.032827] freed 168-byte region [ffff88800d636570, ffff88800d636618) [ 39.033918] [ 39.034084] The buggy address belongs to the physical page: [ 39.034593] page:00000000f991974c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xd636 [ 39.035419] memcg:ffff88800cb64301 [ 39.035749] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.036282] page_type: 0xffffffff() [ 39.036626] raw: 0100000000000200 ffff88800879fc80 ffffea00003a3f80 dead000000000007 [ 39.037336] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cb64301 [ 39.038030] page dumped because: kasan: bad access detected [ 39.038544] [ 39.038711] Memory state around the buggy address: [ 39.039155] ffff88800d636480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.039828] ffff88800d636500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 39.040488] >ffff88800d636580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.041141] ^ [ 39.041655] ffff88800d636600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 39.042310] ffff88800d636680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.042973] ================================================================== [ 39.043832] Disabling lock debugging due to kernel taint [ 40.821468] BUG: Bad rss-counter state mm:00000000ab89e64a type:MM_FILEPAGES val:33 [ 40.822502] BUG: Bad rss-counter state mm:00000000ab89e64a type:MM_ANONPAGES val:22 [ 41.334969] BUG: Bad rss-counter state mm:00000000b71b67a8 type:MM_FILEPAGES val:33 [ 41.336197] BUG: Bad rss-counter state mm:00000000b71b67a8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45831' (ECDSA) to the list of known hosts. 2023/06/20 08:32:42 fuzzer started 2023/06/20 08:32:42 dialing manager at localhost:44161 2023/06/20 08:32:42 checking machine... 2023/06/20 08:32:42 checking revisions... [ 42.112644] kmemleak: Automatic memory scanning thread ended 2023/06/20 08:32:42 testing simple program... [ 42.160292] cgroup: Unknown subsys name 'net' [ 42.213130] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 08:32:41 Registers: info registers vcpu 0 RAX=ffff88806ce36180 RBX=ffff888019301630 RCX=ffffffff81534376 RDX=0000000000000058 RSI=0000000000000008 RDI=ffffffff85d3bed0 RBP=ffff88800c37f640 RSP=ffff888015b07930 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000200 R13=ffffea000064c040 R14=ffffffff81c63f2c R15=0000000000000000 RIP=ffffffff8181055b RFL=00000086 [--S--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 00007f4c5ce93700 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=00007f2170578130 CR3=0000000018dc4000 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=2031343a32333a3830203032206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732031343a32333a3830203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000004004 RBX=ffff88800f143400 RCX=0000000000000000 RDX=ffff8880161851c0 RSI=ffffffff8207bf15 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff88801020fd70 R8 =ffff88800f143598 R9 =0000000000000007 R10=0000000000000004 R11=0000000000000000 R12=0000000000001000 R13=00005614bf648560 R14=ffff88801020fec8 R15=0000000000000001 RIP=ffffffff814c07e4 RFL=00000282 [--S----] 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 00007f652043c900 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=00007ffe44758000 CR3=000000001016c000 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=2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c2c XMM01=00ff00000000000000000000000000ff XMM02=00ff00000000000000000000000000ff XMM03=655f6d61702c7374696d696c5f6d6170 XMM04=3d6c616e696d72657420322e322e302e XMM05=3d656d616e74736f682022646873732f XMM06=746f6f72223d746363612078756e696c XMM07=6e655f6d61702c7374696d696c5f6d61 XMM08=6500273d2720676e6974636570786500 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000