[ 23.584468] BUG: Bad rss-counter state mm:00000000ea5bfe99 type:MM_FILEPAGES val:33 [ 23.585945] BUG: Bad rss-counter state mm:00000000ea5bfe99 type:MM_ANONPAGES val:22 [ 23.751379] ================================================================== [ 23.752576] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.753784] Read of size 8 at addr ffff88801a3be968 by task sshd/218 [ 23.754947] [ 23.755233] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.756369] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.757675] Call Trace: [ 23.758098] [ 23.758471] dump_stack_lvl+0x91/0xf0 [ 23.759110] print_report+0xcc/0x620 [ 23.759729] ? __virt_addr_valid+0x102/0x340 [ 23.760436] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.761233] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.762023] kasan_report+0xbe/0xf0 [ 23.762630] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.763450] vma_interval_tree_remove+0xc75/0xec0 [ 23.764230] vma_prepare+0xc54/0x11a0 [ 23.764854] __split_vma+0x5af/0x950 [ 23.765467] ? __pfx___split_vma+0x10/0x10 [ 23.766148] ? find_held_lock+0x2c/0x110 [ 23.766834] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.767561] ? lock_is_held_type+0x9f/0x120 [ 23.768257] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.769044] ? mtree_range_walk+0x632/0x900 [ 23.769758] ? mas_walk+0x5c7/0x7c0 [ 23.770371] do_vmi_munmap+0x1f1/0x2b0 [ 23.771015] mmap_region+0x1f9/0x2660 [ 23.771640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.772302] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.773234] ? __pfx_lock_acquire+0x10/0x10 [ 23.773922] ? __pfx_mmap_region+0x10/0x10 [ 23.774621] ? security_mmap_addr+0x7d/0xa0 [ 23.775329] ? get_unmapped_area+0x1f5/0x3f0 [ 23.776049] do_mmap+0x854/0xf00 [ 23.776631] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.777270] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.777994] ksys_mmap_pgoff+0x3af/0x500 [ 23.778649] do_syscall_64+0x3f/0x90 [ 23.779279] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.780117] RIP: 0033:0x7fcdb2da0d82 [ 23.780728] 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 [ 23.783540] RSP: 002b:00007fff8d68acc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.784771] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcdb2da0d82 [ 23.785946] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcdb21da000 [ 23.787126] RBP: 00007fcdb21da000 R08: 0000000000000009 R09: 0000000000001000 [ 23.788299] R10: 0000000000000812 R11: 0000000000000206 R12: 0000555c9238eb20 [ 23.789489] R13: 00007fff8d68ace0 R14: 00007fff8d68ad10 R15: 00007fff8d68b070 [ 23.790691] [ 23.791097] [ 23.791391] Allocated by task 211: [ 23.791958] kasan_save_stack+0x22/0x50 [ 23.792621] kasan_set_track+0x25/0x30 [ 23.793267] __kasan_slab_alloc+0x59/0x70 [ 23.793961] kmem_cache_alloc+0x16b/0x370 [ 23.794626] vm_area_dup+0x20/0x160 [ 23.795239] __split_vma+0x170/0x950 [ 23.795910] split_vma+0xc6/0x110 [ 23.796478] mprotect_fixup+0x8d2/0xb30 [ 23.797130] do_mprotect_pkey+0x87e/0xd40 [ 23.797813] __x64_sys_mprotect+0x78/0xc0 [ 23.798493] do_syscall_64+0x3f/0x90 [ 23.799126] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.799981] [ 23.800262] Freed by task 211: [ 23.800762] kasan_save_stack+0x22/0x50 [ 23.801417] kasan_set_track+0x25/0x30 [ 23.802052] kasan_save_free_info+0x2b/0x50 [ 23.802745] __kasan_slab_free+0x10a/0x190 [ 23.803432] kmem_cache_free+0x10d/0x4d0 [ 23.804078] rcu_core+0x8c8/0x2860 [ 23.804658] __do_softirq+0x1b7/0x7d4 [ 23.805266] [ 23.805550] Last potentially related work creation: [ 23.806313] kasan_save_stack+0x22/0x50 [ 23.806981] __kasan_record_aux_stack+0x8e/0xa0 [ 23.807740] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.808578] remove_vma+0x139/0x170 [ 23.809171] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.809891] do_vmi_munmap+0x1f1/0x2b0 [ 23.810527] __vm_munmap+0x138/0x3a0 [ 23.811137] __x64_sys_munmap+0x59/0x80 [ 23.811781] do_syscall_64+0x3f/0x90 [ 23.812396] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.813213] [ 23.813495] The buggy address belongs to the object at ffff88801a3be910 [ 23.813495] which belongs to the cache vm_area_struct of size 168 [ 23.815462] The buggy address is located 88 bytes inside of [ 23.815462] freed 168-byte region [ffff88801a3be910, ffff88801a3be9b8) [ 23.817297] [ 23.817569] The buggy address belongs to the physical page: [ 23.818436] page:000000002a8718e4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1a3be [ 23.819895] memcg:ffff888009acef01 [ 23.820461] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.821300] page_type: 0xffffffff() [ 23.821887] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 23.823126] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009acef01 [ 23.824323] page dumped because: kasan: bad access detected [ 23.825187] [ 23.825470] Memory state around the buggy address: [ 23.826243] ffff88801a3be800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 23.827418] ffff88801a3be880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 23.828747] >ffff88801a3be900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.830028] ^ [ 23.831032] ffff88801a3be980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 23.831937] ffff88801a3bea00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.832828] ================================================================== [ 23.833837] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.880096] BUG: Bad rss-counter state mm:0000000071629cb2 type:MM_FILEPAGES val:33 [ 25.881194] BUG: Bad rss-counter state mm:0000000071629cb2 type:MM_ANONPAGES val:22 [ 26.282445] BUG: Bad rss-counter state mm:00000000aaf582c7 type:MM_FILEPAGES val:33 [ 26.283658] BUG: Bad rss-counter state mm:00000000aaf582c7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:3342' (ECDSA) to the list of known hosts. 2023/06/20 22:41:04 fuzzer started 2023/06/20 22:41:05 dialing manager at localhost:36067 2023/06/20 22:41:05 checking machine... 2023/06/20 22:41:05 checking revisions... [ 26.976999] kmemleak: Automatic memory scanning thread ended 2023/06/20 22:41:05 testing simple program... [ 27.031795] cgroup: Unknown subsys name 'net' [ 27.076099] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:41:04 Registers: info registers vcpu 0 RAX=00007fb317dee163 RBX=0000000000000001 RCX=ffffffff864bbb54 RDX=dffffc0000000000 RSI=1ffff1100d9c1355 RDI=ffff888015ca7fd8 RBP=ffff88806ce09aa8 RSP=ffff88806ce099e0 R8 =ffffffff864bbb58 R9 =ffff88806ce09a90 R10=0000000000038001 R11=00000000000b6a61 R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff888015ca7f58 R15=ffff88806ce09a50 RIP=ffffffff811317d9 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 00007fb3178fb900 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=00007fff74d8f000 CR3=000000001ca70000 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=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=00007ff2e47db000 CR3=000000000e54e000 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=2034303a31343a3232203032206e754a XMM01=73732878696e755f6d6170203a5d3732 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3732325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732034303a31343a3232203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000