[ 38.876464] BUG: Bad rss-counter state mm:00000000d6dc79e4 type:MM_FILEPAGES val:33 [ 38.877454] BUG: Bad rss-counter state mm:00000000d6dc79e4 type:MM_ANONPAGES val:22 [ 39.042338] ================================================================== [ 39.043243] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.044179] Read of size 8 at addr ffff888018f91a50 by task sshd/219 [ 39.044964] [ 39.045187] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.046142] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.047131] Call Trace: [ 39.047452] [ 39.047757] dump_stack_lvl+0x91/0xf0 [ 39.048254] print_report+0xcc/0x620 [ 39.048736] ? __virt_addr_valid+0x102/0x340 [ 39.049298] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.049911] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.050540] kasan_report+0xbe/0xf0 [ 39.051016] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.051630] vma_interval_tree_remove+0xc75/0xec0 [ 39.052385] vma_prepare+0xc54/0x11a0 [ 39.052883] __split_vma+0x5af/0x950 [ 39.053361] ? __pfx___split_vma+0x10/0x10 [ 39.053917] ? find_held_lock+0x2c/0x110 [ 39.054463] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.055048] ? lock_is_held_type+0x9f/0x120 [ 39.055606] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.056228] ? mtree_range_walk+0x632/0x900 [ 39.056826] ? mas_walk+0x5c7/0x7c0 [ 39.057319] do_vmi_munmap+0x1f1/0x2b0 [ 39.057830] mmap_region+0x1f9/0x2660 [ 39.058333] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.058864] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.059603] ? __pfx_lock_acquire+0x10/0x10 [ 39.060144] ? __pfx_mmap_region+0x10/0x10 [ 39.060700] ? security_mmap_addr+0x7d/0xa0 [ 39.061265] ? get_unmapped_area+0x1f5/0x3f0 [ 39.061833] do_mmap+0x854/0xf00 [ 39.062287] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.062790] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.063377] ksys_mmap_pgoff+0x3af/0x500 [ 39.063907] do_syscall_64+0x3f/0x90 [ 39.064408] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.065072] RIP: 0033:0x7f1d2cf04d82 [ 39.065538] 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 [ 39.067763] RSP: 002b:00007ffd71cc5f58 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.068722] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1d2cf04d82 [ 39.069600] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f1d2c33e000 [ 39.070491] RBP: 00007f1d2c33e000 R08: 0000000000000009 R09: 0000000000001000 [ 39.071375] R10: 0000000000000812 R11: 0000000000000206 R12: 0000563406468b20 [ 39.072259] R13: 00007ffd71cc5f70 R14: 00007ffd71cc5fa0 R15: 00007ffd71cc6300 [ 39.073159] [ 39.073462] [ 39.073683] Allocated by task 211: [ 39.074128] kasan_save_stack+0x22/0x50 [ 39.074653] kasan_set_track+0x25/0x30 [ 39.075167] __kasan_slab_alloc+0x59/0x70 [ 39.075713] kmem_cache_alloc+0x16b/0x370 [ 39.076265] vm_area_dup+0x20/0x160 [ 39.076737] __split_vma+0x170/0x950 [ 39.077230] split_vma+0xc6/0x110 [ 39.077695] mprotect_fixup+0x8d2/0xb30 [ 39.078212] do_mprotect_pkey+0x87e/0xd40 [ 39.078747] __x64_sys_mprotect+0x78/0xc0 [ 39.079286] do_syscall_64+0x3f/0x90 [ 39.079779] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.080452] [ 39.080667] Freed by task 203: [ 39.081067] kasan_save_stack+0x22/0x50 [ 39.081593] kasan_set_track+0x25/0x30 [ 39.082091] kasan_save_free_info+0x2b/0x50 [ 39.082644] __kasan_slab_free+0x10a/0x190 [ 39.083188] kmem_cache_free+0x10d/0x4d0 [ 39.083722] rcu_core+0x8c8/0x2860 [ 39.084187] __do_softirq+0x1b7/0x7d4 [ 39.084697] [ 39.084923] Last potentially related work creation: [ 39.085537] kasan_save_stack+0x22/0x50 [ 39.086057] __kasan_record_aux_stack+0x8e/0xa0 [ 39.086649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.087316] remove_vma+0x139/0x170 [ 39.087780] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.088362] do_vmi_munmap+0x1f1/0x2b0 [ 39.088854] __vm_munmap+0x138/0x3a0 [ 39.089333] __x64_sys_munmap+0x59/0x80 [ 39.089844] do_syscall_64+0x3f/0x90 [ 39.090323] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.090986] [ 39.091201] The buggy address belongs to the object at ffff888018f919f8 [ 39.091201] which belongs to the cache vm_area_struct of size 168 [ 39.092743] The buggy address is located 88 bytes inside of [ 39.092743] freed 168-byte region [ffff888018f919f8, ffff888018f91aa0) [ 39.094201] [ 39.094419] The buggy address belongs to the physical page: [ 39.095104] page:000000009b6abd6e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f91 [ 39.096221] memcg:ffff888009a2ae01 [ 39.096677] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.097396] page_type: 0xffffffff() [ 39.097850] raw: 0100000000000200 ffff88800879fc80 ffffea000039fd80 dead000000000007 [ 39.098802] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009a2ae01 [ 39.099743] page dumped because: kasan: bad access detected [ 39.100431] [ 39.100654] Memory state around the buggy address: [ 39.101244] ffff888018f91900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.102108] ffff888018f91980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 39.102986] >ffff888018f91a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.103880] ^ [ 39.104617] ffff888018f91a80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 39.105502] ffff888018f91b00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.106382] ================================================================== [ 39.107505] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 40.716172] BUG: Bad rss-counter state mm:0000000082335820 type:MM_FILEPAGES val:33 [ 40.717471] BUG: Bad rss-counter state mm:0000000082335820 type:MM_ANONPAGES val:22 [ 41.196169] BUG: Bad rss-counter state mm:0000000089f53632 type:MM_FILEPAGES val:33 [ 41.197520] BUG: Bad rss-counter state mm:0000000089f53632 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44274' (ECDSA) to the list of known hosts. 2023/06/19 19:42:16 fuzzer started 2023/06/19 19:42:16 dialing manager at localhost:44161 2023/06/19 19:42:16 checking machine... 2023/06/19 19:42:16 checking revisions... [ 41.967571] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:42:16 testing simple program... [ 42.015598] cgroup: Unknown subsys name 'net' [ 42.060020] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:42:08 Registers: info registers vcpu 0 RAX=ffff88800d8d0000 RBX=ffff88800d8cfa20 RCX=ffffffff81132ffe RDX=ffff88800d8cf938 RSI=0000000000000000 RDI=ffff88800d8cf9f8 RBP=ffff88800d8d0000 RSP=ffff88800d8cf938 R8 =ffff888019c52200 R9 =0000000000000000 R10=ffff88800d8cf988 R11=0000000000000000 R12=0000000000000000 R13=ffff88800d8cf9b0 R14=ffff88800d8cf9d0 R15=ffff88800d8cf988 RIP=ffffffff81133010 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 00007f0a33959900 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=00007f0a32ded3c0 CR3=0000000008ece000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=c6dbe188b47bed3f00000000000ae988 XMM05=bd706ca568d45c330000000000135558 XMM06=806171799158d9670000000000133fd8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff863b27c4 RDX=0000000000000001 RSI=0000000000000000 RDI=0000000000000001 RBP=ffff8880165df600 RSP=ffff8880165df538 R8 =ffffffff863b27c8 R9 =ffff8880165df5e8 R10=0000000000038001 R11=000000000008ab54 R12=ffff8880165df608 R13=ffff8880165df5f0 R14=ffff8880165dfe10 R15=ffff8880165df5a8 RIP=ffffffff81131153 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 00007f2548266900 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=00007ffc7abb2000 CR3=000000000fbb2000 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=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