[ 24.168458] BUG: Bad rss-counter state mm:000000009fa38380 type:MM_FILEPAGES val:33 [ 24.169495] BUG: Bad rss-counter state mm:000000009fa38380 type:MM_ANONPAGES val:22 [ 24.213438] ================================================================== [ 24.214410] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.215400] Read of size 8 at addr ffff88800ded04e0 by task sshd/219 [ 24.216366] [ 24.216598] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.217519] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.218567] Call Trace: [ 24.218907] [ 24.219210] dump_stack_lvl+0x91/0xf0 [ 24.219728] print_report+0xcc/0x620 [ 24.220241] ? __virt_addr_valid+0x102/0x340 [ 24.220825] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.221505] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.222162] kasan_report+0xbe/0xf0 [ 24.222667] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.223334] vma_interval_tree_remove+0xc75/0xec0 [ 24.223991] vma_prepare+0xc54/0x11a0 [ 24.224513] __split_vma+0x5af/0x950 [ 24.225041] ? __pfx___split_vma+0x10/0x10 [ 24.225625] ? find_held_lock+0x2c/0x110 [ 24.226195] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.226813] ? lock_is_held_type+0x9f/0x120 [ 24.227395] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.228064] ? mtree_range_walk+0x632/0x900 [ 24.228672] ? mas_walk+0x5c7/0x7c0 [ 24.229224] do_vmi_munmap+0x1f1/0x2b0 [ 24.229764] mmap_region+0x1f9/0x2660 [ 24.230290] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.230849] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.231632] ? __pfx_lock_acquire+0x10/0x10 [ 24.232216] ? __pfx_mmap_region+0x10/0x10 [ 24.232791] ? security_mmap_addr+0x7d/0xa0 [ 24.233375] ? get_unmapped_area+0x1f5/0x3f0 [ 24.233979] do_mmap+0x854/0xf00 [ 24.234458] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.234998] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.235610] ksys_mmap_pgoff+0x3af/0x500 [ 24.236166] do_syscall_64+0x3f/0x90 [ 24.236690] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.237398] RIP: 0033:0x7f3cc1979d82 [ 24.237893] 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 [ 24.240234] RSP: 002b:00007ffced3c3c88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.241242] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3cc1979d82 [ 24.242169] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3cc0db3000 [ 24.243096] RBP: 00007f3cc0db3000 R08: 0000000000000009 R09: 0000000000001000 [ 24.244020] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563ff6fdb980 [ 24.244942] R13: 00007ffced3c3ca0 R14: 00007ffced3c3cd0 R15: 00007ffced3c4030 [ 24.245885] [ 24.246204] [ 24.246439] Allocated by task 211: [ 24.246906] kasan_save_stack+0x22/0x50 [ 24.247454] kasan_set_track+0x25/0x30 [ 24.247988] __kasan_slab_alloc+0x59/0x70 [ 24.248557] kmem_cache_alloc+0x16b/0x370 [ 24.249125] vm_area_dup+0x20/0x160 [ 24.249622] __split_vma+0x170/0x950 [ 24.250129] split_vma+0xc6/0x110 [ 24.250603] mprotect_fixup+0x8d2/0xb30 [ 24.251152] do_mprotect_pkey+0x87e/0xd40 [ 24.251717] __x64_sys_mprotect+0x78/0xc0 [ 24.252283] do_syscall_64+0x3f/0x90 [ 24.252802] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.253524] [ 24.253757] Freed by task 19: [ 24.254170] kasan_save_stack+0x22/0x50 [ 24.254761] kasan_set_track+0x25/0x30 [ 24.255321] kasan_save_free_info+0x2b/0x50 [ 24.255903] __kasan_slab_free+0x10a/0x190 [ 24.256483] kmem_cache_free+0x10d/0x4d0 [ 24.257042] rcu_core+0x8c8/0x2860 [ 24.257530] __do_softirq+0x1b7/0x7d4 [ 24.258049] [ 24.258282] Last potentially related work creation: [ 24.258919] kasan_save_stack+0x22/0x50 [ 24.259469] __kasan_record_aux_stack+0x8e/0xa0 [ 24.260091] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.260791] remove_vma+0x139/0x170 [ 24.261286] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.261899] do_vmi_munmap+0x1f1/0x2b0 [ 24.262430] __vm_munmap+0x138/0x3a0 [ 24.262935] __x64_sys_munmap+0x59/0x80 [ 24.263481] do_syscall_64+0x3f/0x90 [ 24.264000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.264700] [ 24.264936] Second to last potentially related work creation: [ 24.265704] kasan_save_stack+0x22/0x50 [ 24.266255] __kasan_record_aux_stack+0x8e/0xa0 [ 24.266882] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.267585] remove_vma+0x139/0x170 [ 24.268076] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.268687] do_vmi_munmap+0x1f1/0x2b0 [ 24.269225] mmap_region+0x1f9/0x2660 [ 24.269746] do_mmap+0x854/0xf00 [ 24.270218] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.270752] ksys_mmap_pgoff+0x3af/0x500 [ 24.271298] do_syscall_64+0x3f/0x90 [ 24.271811] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.272515] [ 24.272751] The buggy address belongs to the object at ffff88800ded0488 [ 24.272751] which belongs to the cache vm_area_struct of size 168 [ 24.274376] The buggy address is located 88 bytes inside of [ 24.274376] freed 168-byte region [ffff88800ded0488, ffff88800ded0530) [ 24.275918] [ 24.276151] The buggy address belongs to the physical page: [ 24.276874] page:000000000d1864d1 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded0 [ 24.278058] memcg:ffff88800df09a01 [ 24.278523] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.279228] page_type: 0xffffffff() [ 24.279718] raw: 0100000000000200 ffff8880087a0c80 ffffea00003b01c0 dead000000000002 [ 24.280725] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800df09a01 [ 24.281720] page dumped because: kasan: bad access detected [ 24.282441] [ 24.282676] Memory state around the buggy address: [ 24.283311] ffff88800ded0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.284249] ffff88800ded0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.285192] >ffff88800ded0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.286122] ^ [ 24.286944] ffff88800ded0500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 [ 24.287870] ffff88800ded0580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.288801] ================================================================== [ 24.289876] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.344033] BUG: Bad rss-counter state mm:00000000ea0919ce type:MM_FILEPAGES val:33 [ 26.345351] BUG: Bad rss-counter state mm:00000000ea0919ce type:MM_ANONPAGES val:22 [ 26.731117] BUG: Bad rss-counter state mm:000000004705a9f8 type:MM_FILEPAGES val:33 [ 26.732120] BUG: Bad rss-counter state mm:000000004705a9f8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:42383' (ECDSA) to the list of known hosts. 2023/06/20 21:08:13 fuzzer started 2023/06/20 21:08:13 dialing manager at localhost:36067 2023/06/20 21:08:13 checking machine... 2023/06/20 21:08:13 checking revisions... [ 27.368295] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:08:13 testing simple program... [ 27.414743] cgroup: Unknown subsys name 'net' [ 27.473319] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:08:13 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffed10028e5f3d RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=0000000000000001 RSP=ffff88801472f9d8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000000000 R14=ffff88800f399420 R15=0000000000000000 RIP=ffffffff812d9031 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 00007f08e32bb900 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=00007ffc48df4000 CR3=000000000f3b2000 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=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=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=00007f8e0baa9b08 CR3=000000000ca9a000 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=84f5b94de407a08b89492ef512b88d47 XMM02=000000000011a9f0eff9b2d0a8fce9cb XMM03=000000000011aac02c67c8bc2e329bc3 XMM04=2f6dfd4e1519ddd200000000000ae988 XMM05=dfcdbad4f1609c370000000000132340 XMM06=34c73ec00335e83f0000000000130db0 XMM07=e042d86d42eb936e0000000000121750 XMM08=851ab29b517a617f000000000011aac0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000