syzkaller login: [ 33.699444] BUG: Bad rss-counter state mm:00000000d86afb1b type:MM_FILEPAGES val:33 [ 33.700727] BUG: Bad rss-counter state mm:00000000d86afb1b type:MM_ANONPAGES val:22 [ 33.738423] ================================================================== [ 33.739422] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.740372] Read of size 8 at addr ffff888014245c20 by task sshd/220 [ 33.741148] [ 33.741370] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.742248] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.743245] Call Trace: [ 33.743574] [ 33.743860] dump_stack_lvl+0x91/0xf0 [ 33.744352] print_report+0xcc/0x620 [ 33.744848] ? __virt_addr_valid+0x102/0x340 [ 33.745405] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.746035] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.746707] kasan_report+0xbe/0xf0 [ 33.747186] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.747845] vma_interval_tree_remove+0xc75/0xec0 [ 33.748455] vma_prepare+0xc54/0x11a0 [ 33.748936] __split_vma+0x5af/0x950 [ 33.749412] ? __pfx___split_vma+0x10/0x10 [ 33.749946] ? find_held_lock+0x2c/0x110 [ 33.750483] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.751075] ? lock_is_held_type+0x9f/0x120 [ 33.751622] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.752242] ? mtree_range_walk+0x632/0x900 [ 33.752813] ? mas_walk+0x5c7/0x7c0 [ 33.753311] do_vmi_munmap+0x1f1/0x2b0 [ 33.753828] mmap_region+0x1f9/0x2660 [ 33.754332] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.754891] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.755633] ? __pfx_lock_acquire+0x10/0x10 [ 33.756198] ? __pfx_mmap_region+0x10/0x10 [ 33.756735] ? security_mmap_addr+0x7d/0xa0 [ 33.757278] ? get_unmapped_area+0x1f5/0x3f0 [ 33.757848] do_mmap+0x854/0xf00 [ 33.758292] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.758795] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.759374] ksys_mmap_pgoff+0x3af/0x500 [ 33.759895] do_syscall_64+0x3f/0x90 [ 33.760382] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.761032] RIP: 0033:0x7f3f9f131d82 [ 33.761501] 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 [ 33.763665] RSP: 002b:00007fffc0696a88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.764583] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3f9f131d82 [ 33.765597] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3f9e56b000 [ 33.766468] RBP: 00007f3f9e56b000 R08: 0000000000000009 R09: 0000000000001000 [ 33.767328] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b567a3fb20 [ 33.768199] R13: 00007fffc0696aa0 R14: 00007fffc0696ad0 R15: 00007fffc0696e30 [ 33.769062] [ 33.769361] [ 33.769582] Allocated by task 213: [ 33.770016] kasan_save_stack+0x22/0x50 [ 33.770541] kasan_set_track+0x25/0x30 [ 33.771043] __kasan_slab_alloc+0x59/0x70 [ 33.771581] kmem_cache_alloc+0x16b/0x370 [ 33.772098] vm_area_dup+0x20/0x160 [ 33.772554] __split_vma+0x170/0x950 [ 33.773038] split_vma+0xc6/0x110 [ 33.773487] mprotect_fixup+0x8d2/0xb30 [ 33.773999] do_mprotect_pkey+0x87e/0xd40 [ 33.774553] __x64_sys_mprotect+0x78/0xc0 [ 33.775084] do_syscall_64+0x3f/0x90 [ 33.775573] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.776228] [ 33.776446] Freed by task 213: [ 33.776890] kasan_save_stack+0x22/0x50 [ 33.777444] kasan_set_track+0x25/0x30 [ 33.777968] kasan_save_free_info+0x2b/0x50 [ 33.778523] __kasan_slab_free+0x10a/0x190 [ 33.779075] kmem_cache_free+0x10d/0x4d0 [ 33.779613] rcu_core+0x8c8/0x2860 [ 33.780087] __do_softirq+0x1b7/0x7d4 [ 33.780576] [ 33.780799] Last potentially related work creation: [ 33.781387] kasan_save_stack+0x22/0x50 [ 33.781899] __kasan_record_aux_stack+0x8e/0xa0 [ 33.782528] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.783199] remove_vma+0x139/0x170 [ 33.783667] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.784253] do_vmi_munmap+0x1f1/0x2b0 [ 33.784759] __vm_munmap+0x138/0x3a0 [ 33.785256] __x64_sys_munmap+0x59/0x80 [ 33.785765] do_syscall_64+0x3f/0x90 [ 33.786243] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.786910] [ 33.787124] The buggy address belongs to the object at ffff888014245bc8 [ 33.787124] which belongs to the cache vm_area_struct of size 168 [ 33.788627] The buggy address is located 88 bytes inside of [ 33.788627] freed 168-byte region [ffff888014245bc8, ffff888014245c70) [ 33.790058] [ 33.790277] The buggy address belongs to the physical page: [ 33.790962] page:0000000047fe7747 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x14245 [ 33.792109] memcg:ffff888016e46301 [ 33.792552] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.793206] page_type: 0xffffffff() [ 33.793668] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 33.794655] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888016e46301 [ 33.795579] page dumped because: kasan: bad access detected [ 33.796239] [ 33.796453] Memory state around the buggy address: [ 33.797036] ffff888014245b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.797892] ffff888014245b80: 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb [ 33.798760] >ffff888014245c00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc [ 33.799619] ^ [ 33.800151] ffff888014245c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 33.801007] ffff888014245d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 33.801865] ================================================================== [ 33.802915] Disabling lock debugging due to kernel taint [ 35.732721] BUG: Bad rss-counter state mm:000000009b8f19c1 type:MM_FILEPAGES val:33 [ 35.733967] BUG: Bad rss-counter state mm:000000009b8f19c1 type:MM_ANONPAGES val:22 [ 36.134588] BUG: Bad rss-counter state mm:00000000dc2b4b98 type:MM_FILEPAGES val:33 [ 36.135686] BUG: Bad rss-counter state mm:00000000dc2b4b98 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:43497' (ECDSA) to the list of known hosts. 2023/06/19 10:58:27 fuzzer started 2023/06/19 10:58:27 dialing manager at localhost:44161 2023/06/19 10:58:27 checking machine... 2023/06/19 10:58:27 checking revisions... [ 36.859665] kmemleak: Automatic memory scanning thread ended 2023/06/19 10:58:28 testing simple program... [ 36.901626] cgroup: Unknown subsys name 'net' [ 36.950489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:58:24 Registers: info registers vcpu 0 RAX=ffff888018938001 RBX=ffff888018937908 RCX=0000000000000001 RDX=ffff888018937910 RSI=ffff8880189378f8 RDI=ffff888018937640 RBP=ffff888018930000 RSP=ffff8880189375c0 R8 =0000000000000001 R9 =ffff888018937670 R10=0000000000038001 R11=0000000000020c48 R12=ffff888018937690 R13=ffff888018937678 R14=ffff8880189378f8 R15=ffff888018937630 RIP=ffffffff81131cda RFL=00000202 [-------] 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 00007f548648c700 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=00007f6b44ced330 CR3=0000000016648000 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=2037323a38353a3031203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037323a38353a3031203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff888015bb8001 RBX=0000000000000001 RCX=0000000000000001 RDX=ffff888015bb7f01 RSI=ffff888015bb7f48 RDI=ffff888015bb7218 RBP=ffff888015bb7f48 RSP=ffff888015bb7170 R8 =0000000000000001 R9 =ffff888015bb7248 R10=0000000000038001 R11=00000000000b4fb9 R12=0000000000000008 R13=ffff888015bb0000 R14=ffff888015bb7f48 R15=ffff888015bb7208 RIP=ffffffff811304ce 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 00007f68019ce900 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=00007ffdbf797000 CR3=000000001b8f0000 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