syzkaller login: [ 34.305450] BUG: Bad rss-counter state mm:0000000000fca116 type:MM_FILEPAGES val:33 [ 34.306458] BUG: Bad rss-counter state mm:0000000000fca116 type:MM_ANONPAGES val:22 [ 34.469563] ================================================================== [ 34.470477] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.471401] Read of size 8 at addr ffff88800992aa50 by task sshd/219 [ 34.472256] [ 34.472490] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.473350] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.474336] Call Trace: [ 34.474652] [ 34.474937] dump_stack_lvl+0x91/0xf0 [ 34.475418] print_report+0xcc/0x620 [ 34.475926] ? __virt_addr_valid+0x102/0x340 [ 34.476473] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.477097] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.477713] kasan_report+0xbe/0xf0 [ 34.478194] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.478822] vma_interval_tree_remove+0xc75/0xec0 [ 34.479423] vma_prepare+0xc54/0x11a0 [ 34.479915] __split_vma+0x5af/0x950 [ 34.480394] ? __pfx___split_vma+0x10/0x10 [ 34.480931] ? find_held_lock+0x2c/0x110 [ 34.481448] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.482013] ? lock_is_held_type+0x9f/0x120 [ 34.482555] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.483178] ? mtree_range_walk+0x632/0x900 [ 34.483726] ? mas_walk+0x5c7/0x7c0 [ 34.484211] do_vmi_munmap+0x1f1/0x2b0 [ 34.484706] mmap_region+0x1f9/0x2660 [ 34.485194] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.485710] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.486448] ? __pfx_lock_acquire+0x10/0x10 [ 34.486989] ? __pfx_mmap_region+0x10/0x10 [ 34.487522] ? security_mmap_addr+0x7d/0xa0 [ 34.488083] ? get_unmapped_area+0x1f5/0x3f0 [ 34.488632] do_mmap+0x854/0xf00 [ 34.489074] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.489581] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.490151] ksys_mmap_pgoff+0x3af/0x500 [ 34.490657] do_syscall_64+0x3f/0x90 [ 34.491132] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.491775] RIP: 0033:0x7fa744959d82 [ 34.492239] 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 [ 34.494360] RSP: 002b:00007ffd26ce6898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.495264] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fa744959d82 [ 34.496140] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fa743d93000 [ 34.496990] RBP: 00007fa743d93000 R08: 0000000000000009 R09: 0000000000001000 [ 34.497838] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557d9d251ec0 [ 34.498695] R13: 00007ffd26ce68b0 R14: 00007ffd26ce68e0 R15: 00007ffd26ce6c40 [ 34.499545] [ 34.499845] [ 34.500065] Allocated by task 212: [ 34.500488] kasan_save_stack+0x22/0x50 [ 34.500995] kasan_set_track+0x25/0x30 [ 34.501492] __kasan_slab_alloc+0x59/0x70 [ 34.502017] kmem_cache_alloc+0x16b/0x370 [ 34.502540] vm_area_dup+0x20/0x160 [ 34.502996] __split_vma+0x170/0x950 [ 34.503465] split_vma+0xc6/0x110 [ 34.503912] mprotect_fixup+0x8d2/0xb30 [ 34.504420] do_mprotect_pkey+0x87e/0xd40 [ 34.504953] __x64_sys_mprotect+0x78/0xc0 [ 34.505472] do_syscall_64+0x3f/0x90 [ 34.505946] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.506576] [ 34.506794] Freed by task 212: [ 34.507186] kasan_save_stack+0x22/0x50 [ 34.507692] kasan_set_track+0x25/0x30 [ 34.508216] kasan_save_free_info+0x2b/0x50 [ 34.508751] __kasan_slab_free+0x10a/0x190 [ 34.509287] kmem_cache_free+0x10d/0x4d0 [ 34.509793] rcu_core+0x8c8/0x2860 [ 34.510234] __do_softirq+0x1b7/0x7d4 [ 34.510710] [ 34.510925] Last potentially related work creation: [ 34.511514] kasan_save_stack+0x22/0x50 [ 34.512024] __kasan_record_aux_stack+0x8e/0xa0 [ 34.512597] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.513243] remove_vma+0x139/0x170 [ 34.513691] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.514255] do_vmi_munmap+0x1f1/0x2b0 [ 34.514745] __vm_munmap+0x138/0x3a0 [ 34.515210] __x64_sys_munmap+0x59/0x80 [ 34.515711] do_syscall_64+0x3f/0x90 [ 34.516190] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.516830] [ 34.517053] Second to last potentially related work creation: [ 34.517727] kasan_save_stack+0x22/0x50 [ 34.518228] __kasan_record_aux_stack+0x8e/0xa0 [ 34.518810] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.519452] remove_vma+0x139/0x170 [ 34.519927] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.520486] do_vmi_munmap+0x1f1/0x2b0 [ 34.520973] mmap_region+0x1f9/0x2660 [ 34.521453] do_mmap+0x854/0xf00 [ 34.521886] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.522372] ksys_mmap_pgoff+0x3af/0x500 [ 34.522875] do_syscall_64+0x3f/0x90 [ 34.523355] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.524001] [ 34.524218] The buggy address belongs to the object at ffff88800992a9f8 [ 34.524218] which belongs to the cache vm_area_struct of size 168 [ 34.525669] The buggy address is located 88 bytes inside of [ 34.525669] freed 168-byte region [ffff88800992a9f8, ffff88800992aaa0) [ 34.527054] [ 34.527271] The buggy address belongs to the physical page: [ 34.527928] page:000000000b8951c7 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x992a [ 34.529020] memcg:ffff88800e60e101 [ 34.529449] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.530098] page_type: 0xffffffff() [ 34.530558] raw: 0100000000000200 ffff88800879fc80 ffffea00003611c0 dead000000000002 [ 34.531483] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e60e101 [ 34.532400] page dumped because: kasan: bad access detected [ 34.533062] [ 34.533279] Memory state around the buggy address: [ 34.533853] ffff88800992a900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.534708] ffff88800992a980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 34.535559] >ffff88800992aa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.536428] ^ [ 34.537130] ffff88800992aa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 34.537979] ffff88800992ab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.538836] ================================================================== [ 34.539843] Disabling lock debugging due to kernel taint [ 36.578422] BUG: Bad rss-counter state mm:000000005aebc6fc type:MM_FILEPAGES val:33 [ 36.579346] BUG: Bad rss-counter state mm:000000005aebc6fc type:MM_ANONPAGES val:22 [ 37.125413] BUG: Bad rss-counter state mm:00000000380decca type:MM_FILEPAGES val:33 [ 37.126572] BUG: Bad rss-counter state mm:00000000380decca type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:32331' (ECDSA) to the list of known hosts. 2023/06/19 21:44:55 fuzzer started 2023/06/19 21:44:55 dialing manager at localhost:44161 2023/06/19 21:44:55 checking machine... 2023/06/19 21:44:55 checking revisions... [ 37.783383] kmemleak: Automatic memory scanning thread ended 2023/06/19 21:44:55 testing simple program... [ 37.824468] cgroup: Unknown subsys name 'net' [ 37.867587] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:44:44 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800f970000 RSI=ffffffff81851861 RDI=0000000000000005 RBP=ffff888013610500 RSP=ffff88801cdffed8 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=ffff88800f547840 R13=0000000000000000 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff814c081b RFL=00000246 [---Z-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 00007fcc57d2a900 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=00007fffcbe71000 CR3=000000000f1b8000 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=563412feff00545000000000000080fe 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 info registers vcpu 1 RAX=ffff88806cf35000 RBX=0000000000000001 RCX=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 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 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=00007f6581338c50 CR3=0000000016c18000 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=2035353a34343a3132203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034353a34343a3132203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000