[ 30.440337] BUG: Bad rss-counter state mm:00000000017dfc8e type:MM_FILEPAGES val:33 [ 30.441739] BUG: Bad rss-counter state mm:00000000017dfc8e type:MM_ANONPAGES val:22 [ 30.481353] ================================================================== [ 30.482255] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.483186] Read of size 8 at addr ffff888019e153f8 by task sshd/219 [ 30.483953] [ 30.484244] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.485146] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.486139] Call Trace: [ 30.486474] [ 30.486758] dump_stack_lvl+0x91/0xf0 [ 30.487248] print_report+0xcc/0x620 [ 30.487733] ? __virt_addr_valid+0x102/0x340 [ 30.488278] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.488933] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.489556] kasan_report+0xbe/0xf0 [ 30.490029] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.490647] vma_interval_tree_remove+0xc75/0xec0 [ 30.491245] vma_prepare+0xc54/0x11a0 [ 30.491717] __split_vma+0x5af/0x950 [ 30.492191] ? __pfx___split_vma+0x10/0x10 [ 30.492755] ? find_held_lock+0x2c/0x110 [ 30.493276] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.493845] ? lock_is_held_type+0x9f/0x120 [ 30.494381] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.494993] ? mtree_range_walk+0x632/0x900 [ 30.495543] ? mas_walk+0x5c7/0x7c0 [ 30.496020] do_vmi_munmap+0x1f1/0x2b0 [ 30.496521] mmap_region+0x1f9/0x2660 [ 30.497034] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.497548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.498261] ? __pfx_lock_acquire+0x10/0x10 [ 30.498796] ? __pfx_mmap_region+0x10/0x10 [ 30.499321] ? security_mmap_addr+0x7d/0xa0 [ 30.499854] ? get_unmapped_area+0x1f5/0x3f0 [ 30.500395] do_mmap+0x854/0xf00 [ 30.500866] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.501358] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.501919] ksys_mmap_pgoff+0x3af/0x500 [ 30.502432] do_syscall_64+0x3f/0x90 [ 30.502907] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.503549] RIP: 0033:0x7f64cbee8d82 [ 30.504000] 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 [ 30.506120] RSP: 002b:00007ffd81d82608 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.507027] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f64cbee8d82 [ 30.507866] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f64cb322000 [ 30.508732] RBP: 00007f64cb322000 R08: 0000000000000009 R09: 0000000000001000 [ 30.509583] R10: 0000000000000812 R11: 0000000000000206 R12: 000055870638bb20 [ 30.510432] R13: 00007ffd81d82620 R14: 00007ffd81d82650 R15: 00007ffd81d829b0 [ 30.511282] [ 30.511580] [ 30.511799] Allocated by task 212: [ 30.512224] kasan_save_stack+0x22/0x50 [ 30.512773] kasan_set_track+0x25/0x30 [ 30.513265] __kasan_slab_alloc+0x59/0x70 [ 30.513787] kmem_cache_alloc+0x16b/0x370 [ 30.514300] vm_area_dup+0x20/0x160 [ 30.514754] __split_vma+0x170/0x950 [ 30.515242] split_vma+0xc6/0x110 [ 30.515685] mprotect_fixup+0x8d2/0xb30 [ 30.516180] do_mprotect_pkey+0x87e/0xd40 [ 30.516741] __x64_sys_mprotect+0x78/0xc0 [ 30.517269] do_syscall_64+0x3f/0x90 [ 30.517742] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.518389] [ 30.518611] Freed by task 212: [ 30.519001] kasan_save_stack+0x22/0x50 [ 30.519505] kasan_set_track+0x25/0x30 [ 30.519991] kasan_save_free_info+0x2b/0x50 [ 30.520525] __kasan_slab_free+0x10a/0x190 [ 30.521095] kmem_cache_free+0x10d/0x4d0 [ 30.521610] rcu_core+0x8c8/0x2860 [ 30.522052] __do_softirq+0x1b7/0x7d4 [ 30.522540] [ 30.522755] Last potentially related work creation: [ 30.523336] kasan_save_stack+0x22/0x50 [ 30.523836] __kasan_record_aux_stack+0x8e/0xa0 [ 30.524414] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.525089] remove_vma+0x139/0x170 [ 30.525541] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.526095] do_vmi_munmap+0x1f1/0x2b0 [ 30.526588] __vm_munmap+0x138/0x3a0 [ 30.527059] __x64_sys_munmap+0x59/0x80 [ 30.527553] do_syscall_64+0x3f/0x90 [ 30.528027] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.528692] [ 30.528919] The buggy address belongs to the object at ffff888019e153a0 [ 30.528919] which belongs to the cache vm_area_struct of size 168 [ 30.530377] The buggy address is located 88 bytes inside of [ 30.530377] freed 168-byte region [ffff888019e153a0, ffff888019e15448) [ 30.531781] [ 30.531997] The buggy address belongs to the physical page: [ 30.532691] page:000000008be0fb1e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19e15 [ 30.533805] memcg:ffff88800ecf6201 [ 30.534230] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.534883] page_type: 0xffffffff() [ 30.535336] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.536269] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ecf6201 [ 30.537214] page dumped because: kasan: bad access detected [ 30.537887] [ 30.538102] Memory state around the buggy address: [ 30.538693] ffff888019e15280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 30.539562] ffff888019e15300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 30.540438] >ffff888019e15380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 30.541358] ^ [ 30.542232] ffff888019e15400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 30.543117] ffff888019e15480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.543996] ================================================================== [ 30.545065] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.778985] BUG: Bad rss-counter state mm:00000000f0f37ed1 type:MM_FILEPAGES val:33 [ 32.780775] BUG: Bad rss-counter state mm:00000000f0f37ed1 type:MM_ANONPAGES val:22 [ 33.259611] BUG: Bad rss-counter state mm:000000005506e9fe type:MM_FILEPAGES val:33 [ 33.261320] BUG: Bad rss-counter state mm:000000005506e9fe type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:4297' (ECDSA) to the list of known hosts. 2023/06/21 10:48:25 fuzzer started 2023/06/21 10:48:25 dialing manager at localhost:36067 2023/06/21 10:48:25 checking machine... 2023/06/21 10:48:25 checking revisions... [ 34.023417] kmemleak: Automatic memory scanning thread ended 2023/06/21 10:48:25 testing simple program... [ 34.066281] cgroup: Unknown subsys name 'net' [ 34.117559] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:48:25 Registers: info registers vcpu 0 RAX=1ffffffff0bbfc2d RBX=ffffffff85dfe168 RCX=ffffffff8180ce5f RDX=0000000000000008 RSI=ffffffff86139066 RDI=ffffffff85dfe158 RBP=ffffffff85dfe158 RSP=ffff88806ce099b8 R8 =ffffffff86139066 R9 =ffff88806ce09ab0 R10=0000000000038001 R11=0000000000020de5 R12=ffffffff85dfe178 R13=ffffffff85dfe158 R14=ffffffff85dfe158 R15=dffffc0000000000 RIP=ffffffff8112fc7a RFL=00000216 [----AP-] 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 00007ff194e3e900 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=0000561407676748 CR3=000000000e90e000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=dcf38fe531166d2000000000000ae988 XMM05=43593be929075a4800000000001324c8 XMM06=806171799158d96700000000001311f8 XMM07=fb795ef6d65770560000000000121478 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=0000000000000001 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=00005614076503c8 CR3=000000000c9ea000 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=2034323a38343a3031203132206e754a XMM01=6964206465766965636552203a5d3832 XMM02=6f63736964203a31313a343736353320 XMM03=7266207463656e6e6f63736964206465 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034323a38343a3031203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000