[ 25.335620] BUG: Bad rss-counter state mm:00000000170f89b1 type:MM_FILEPAGES val:33 [ 25.336650] BUG: Bad rss-counter state mm:00000000170f89b1 type:MM_ANONPAGES val:22 [ 25.500988] ================================================================== [ 25.501921] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 25.502870] Read of size 8 at addr ffff888016e294e0 by task sshd/219 [ 25.503646] [ 25.503869] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 25.504811] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 25.505796] Call Trace: [ 25.506124] <TASK> [ 25.506425] dump_stack_lvl+0x91/0xf0 [ 25.506927] print_report+0xcc/0x620 [ 25.507428] ? __virt_addr_valid+0x102/0x340 [ 25.507990] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.508609] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.509241] kasan_report+0xbe/0xf0 [ 25.509752] ? vma_interval_tree_remove+0xc75/0xec0 [ 25.510394] vma_interval_tree_remove+0xc75/0xec0 [ 25.511003] vma_prepare+0xc54/0x11a0 [ 25.511489] __split_vma+0x5af/0x950 [ 25.511962] ? __pfx___split_vma+0x10/0x10 [ 25.512496] ? find_held_lock+0x2c/0x110 [ 25.513024] do_vmi_align_munmap+0x2ba/0x11f0 [ 25.513592] ? lock_is_held_type+0x9f/0x120 [ 25.514144] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 25.514755] ? mtree_range_walk+0x632/0x900 [ 25.515310] ? mas_walk+0x5c7/0x7c0 [ 25.515795] do_vmi_munmap+0x1f1/0x2b0 [ 25.516299] mmap_region+0x1f9/0x2660 [ 25.516790] ? vm_mmap_pgoff+0x15c/0x3a0 [ 25.517309] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 25.518054] ? __pfx_lock_acquire+0x10/0x10 [ 25.518610] ? __pfx_mmap_region+0x10/0x10 [ 25.519161] ? security_mmap_addr+0x7d/0xa0 [ 25.519696] ? get_unmapped_area+0x1f5/0x3f0 [ 25.520257] do_mmap+0x854/0xf00 [ 25.520712] vm_mmap_pgoff+0x1a6/0x3a0 [ 25.521209] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 25.521796] ksys_mmap_pgoff+0x3af/0x500 [ 25.522316] do_syscall_64+0x3f/0x90 [ 25.522803] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.523459] RIP: 0033:0x7f1016faed82 [ 25.523926] 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 [ 25.526155] RSP: 002b:00007ffcaa465348 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 25.527073] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1016faed82 [ 25.527945] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f10163e8000 [ 25.528812] RBP: 00007f10163e8000 R08: 0000000000000009 R09: 0000000000001000 [ 25.529678] R10: 0000000000000812 R11: 0000000000000206 R12: 0000561eaf2daec0 [ 25.530588] R13: 00007ffcaa465360 R14: 00007ffcaa465390 R15: 00007ffcaa4656f0 [ 25.531512] </TASK> [ 25.531807] [ 25.532090] Allocated by task 212: [ 25.532574] kasan_save_stack+0x22/0x50 [ 25.533103] kasan_set_track+0x25/0x30 [ 25.533654] __kasan_slab_alloc+0x59/0x70 [ 25.534295] kmem_cache_alloc+0x16b/0x370 [ 25.534923] vm_area_dup+0x20/0x160 [ 25.535485] __split_vma+0x170/0x950 [ 25.536052] split_vma+0xc6/0x110 [ 25.536504] mprotect_fixup+0x8d2/0xb30 [ 25.537030] do_mprotect_pkey+0x87e/0xd40 [ 25.537558] __x64_sys_mprotect+0x78/0xc0 [ 25.538112] do_syscall_64+0x3f/0x90 [ 25.538595] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.539258] [ 25.539481] Freed by task 212: [ 25.539899] kasan_save_stack+0x22/0x50 [ 25.540415] kasan_set_track+0x25/0x30 [ 25.540915] kasan_save_free_info+0x2b/0x50 [ 25.541485] __kasan_slab_free+0x10a/0x190 [ 25.542022] kmem_cache_free+0x10d/0x4d0 [ 25.542557] rcu_core+0x8c8/0x2860 [ 25.543009] __do_softirq+0x1b7/0x7d4 [ 25.543493] [ 25.543709] Last potentially related work creation: [ 25.544304] kasan_save_stack+0x22/0x50 [ 25.544839] __kasan_record_aux_stack+0x8e/0xa0 [ 25.545408] __call_rcu_common.constprop.0+0x6a/0xb90 [ 25.546051] remove_vma+0x139/0x170 [ 25.546537] do_vmi_align_munmap+0xd4a/0x11f0 [ 25.547102] do_vmi_munmap+0x1f1/0x2b0 [ 25.547594] __vm_munmap+0x138/0x3a0 [ 25.548074] __x64_sys_munmap+0x59/0x80 [ 25.548667] do_syscall_64+0x3f/0x90 [ 25.549272] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 25.550126] [ 25.550406] The buggy address belongs to the object at ffff888016e29488 [ 25.550406] which belongs to the cache vm_area_struct of size 168 [ 25.552270] The buggy address is located 88 bytes inside of [ 25.552270] freed 168-byte region [ffff888016e29488, ffff888016e29530) [ 25.553782] [ 25.553996] The buggy address belongs to the physical page: [ 25.554724] page:00000000378c9f56 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16e29 [ 25.555833] memcg:ffff88800ebd5c01 [ 25.556286] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 25.557042] page_type: 0xffffffff() [ 25.557471] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 25.558396] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ebd5c01 [ 25.559338] page dumped because: kasan: bad access detected [ 25.559969] [ 25.560184] Memory state around the buggy address: [ 25.560795] ffff888016e29380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 25.561896] ffff888016e29400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 25.562995] >ffff888016e29480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.564112] ^ [ 25.565035] ffff888016e29500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 25.566169] ffff888016e29580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 25.567307] ================================================================== [ 25.568543] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 27.562452] BUG: Bad rss-counter state mm:00000000466cc965 type:MM_FILEPAGES val:33 [ 27.563450] BUG: Bad rss-counter state mm:00000000466cc965 type:MM_ANONPAGES val:22 [ 28.017449] BUG: Bad rss-counter state mm:000000004ce630f0 type:MM_FILEPAGES val:33 [ 28.018466] BUG: Bad rss-counter state mm:000000004ce630f0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:16847' (ECDSA) to the list of known hosts. 2023/06/20 04:12:04 fuzzer started 2023/06/20 04:12:04 dialing manager at localhost:44161 2023/06/20 04:12:04 checking machine... 2023/06/20 04:12:04 checking revisions... [ 28.721704] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:12:04 testing simple program... [ 28.773347] cgroup: Unknown subsys name 'net' [ 28.822256] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:12:03 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=00007f631d703860 RCX=0000000000000000 RDX=ffff88800fe8b680 RSI=ffffffff8369f8a9 RDI=0000000000000007 RBP=ffff888016a678e0 RSP=ffff888016a677b8 R8 =0000000000000007 R9 =0000000000000003 R10=0000000000000000 R11=63206e6f69737365 R12=ffff888016a67e60 R13=0000000000000000 R14=dffffc0000000000 R15=00007f631d703860 RIP=ffffffff814c081b RFL=00040246 [---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 00007f631d707700 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=00007fff7e3f5000 CR3=0000000009828000 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=00000000000000000000000000000000 XMM01=6d6f72662064657463656e6e6f637369 XMM02=2e303120746f6f722072657375206d6f XMM03=3a5d3832325b646873732034303a3231 XMM04=6456774875434142334f726f59427469 XMM05=485320415352203a3268737320363034 XMM06=206d6f726620746f6f7220726f662079 XMM07=00000000000000000000000000000000 XMM08=3a677562656420676f6c737973720000 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=ffff888008c58400 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=00007f0775288040 CR3=000000000d5e4000 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=699c38754417a1a07741c9a7efd049cf XMM02=2c67c8bc2e329bc3000000000011c050 XMM03=fb795ef6d65770560000000000122ed8 XMM04=d999a97d3d14cc4900000000000ae988 XMM05=7443a8019ea9c1c700000000001338d8 XMM06=806171799158d9670000000000132608 XMM07=e042d86d42eb936e0000000000123158 XMM08=ad497c69cb4dec75000000000011c0b0 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000