[ 23.874672] BUG: Bad rss-counter state mm:000000001e5fa41a type:MM_FILEPAGES val:33 [ 23.875990] BUG: Bad rss-counter state mm:000000001e5fa41a type:MM_ANONPAGES val:22 [ 24.006040] ================================================================== [ 24.006738] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.007449] Read of size 8 at addr ffff888018f3b5c8 by task sshd/219 [ 24.008030] [ 24.008202] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.008888] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.009716] Call Trace: [ 24.009961] [ 24.010181] dump_stack_lvl+0x91/0xf0 [ 24.010555] print_report+0xcc/0x620 [ 24.010924] ? __virt_addr_valid+0x102/0x340 [ 24.011348] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.011814] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.012287] kasan_report+0xbe/0xf0 [ 24.012645] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.013144] vma_interval_tree_remove+0xc75/0xec0 [ 24.013603] vma_prepare+0xc54/0x11a0 [ 24.013965] __split_vma+0x5af/0x950 [ 24.014323] ? __pfx___split_vma+0x10/0x10 [ 24.014727] ? find_held_lock+0x2c/0x110 [ 24.015124] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.015548] ? lock_is_held_type+0x9f/0x120 [ 24.015962] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.016430] ? mtree_range_walk+0x632/0x900 [ 24.016869] ? mas_walk+0x5c7/0x7c0 [ 24.017237] do_vmi_munmap+0x1f1/0x2b0 [ 24.017616] mmap_region+0x1f9/0x2660 [ 24.017988] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.018400] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.018955] ? __pfx_lock_acquire+0x10/0x10 [ 24.019381] ? __pfx_mmap_region+0x10/0x10 [ 24.019790] ? security_mmap_addr+0x7d/0xa0 [ 24.020201] ? get_unmapped_area+0x1f5/0x3f0 [ 24.020640] do_mmap+0x854/0xf00 [ 24.020985] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.021391] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.021827] ksys_mmap_pgoff+0x3af/0x500 [ 24.022215] do_syscall_64+0x3f/0x90 [ 24.022586] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.023093] RIP: 0033:0x7f7d4efddd82 [ 24.023450] 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 [ 24.025118] RSP: 002b:00007ffc4792c858 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.025832] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7d4efddd82 [ 24.026493] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7d4e417000 [ 24.027157] RBP: 00007f7d4e417000 R08: 0000000000000009 R09: 0000000000001000 [ 24.027836] R10: 0000000000000812 R11: 0000000000000206 R12: 00005613dad8fec0 [ 24.028506] R13: 00007ffc4792c870 R14: 00007ffc4792c8a0 R15: 00007ffc4792cc00 [ 24.029187] [ 24.029410] [ 24.029577] Allocated by task 212: [ 24.029919] kasan_save_stack+0x22/0x50 [ 24.030309] kasan_set_track+0x25/0x30 [ 24.030689] __kasan_slab_alloc+0x59/0x70 [ 24.031100] kmem_cache_alloc+0x16b/0x370 [ 24.031503] vm_area_dup+0x20/0x160 [ 24.031853] __split_vma+0x170/0x950 [ 24.032229] split_vma+0xc6/0x110 [ 24.032570] mprotect_fixup+0x8d2/0xb30 [ 24.032973] do_mprotect_pkey+0x87e/0xd40 [ 24.033377] __x64_sys_mprotect+0x78/0xc0 [ 24.033781] do_syscall_64+0x3f/0x90 [ 24.034167] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.034668] [ 24.034832] Freed by task 203: [ 24.035139] kasan_save_stack+0x22/0x50 [ 24.035531] kasan_set_track+0x25/0x30 [ 24.035915] kasan_save_free_info+0x2b/0x50 [ 24.036328] __kasan_slab_free+0x10a/0x190 [ 24.036749] kmem_cache_free+0x10d/0x4d0 [ 24.037139] rcu_core+0x8c8/0x2860 [ 24.037485] __do_softirq+0x1b7/0x7d4 [ 24.037867] [ 24.038031] Last potentially related work creation: [ 24.038490] kasan_save_stack+0x22/0x50 [ 24.038873] __kasan_record_aux_stack+0x8e/0xa0 [ 24.039321] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.039821] remove_vma+0x139/0x170 [ 24.040175] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.040626] do_vmi_munmap+0x1f1/0x2b0 [ 24.041010] __vm_munmap+0x138/0x3a0 [ 24.041376] __x64_sys_munmap+0x59/0x80 [ 24.041761] do_syscall_64+0x3f/0x90 [ 24.042135] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.042637] [ 24.042810] Second to last potentially related work creation: [ 24.043357] kasan_save_stack+0x22/0x50 [ 24.043753] __kasan_record_aux_stack+0x8e/0xa0 [ 24.044205] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.044715] remove_vma+0x139/0x170 [ 24.045067] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.045502] do_vmi_munmap+0x1f1/0x2b0 [ 24.045875] mmap_region+0x1f9/0x2660 [ 24.046251] do_mmap+0x854/0xf00 [ 24.046591] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.046972] ksys_mmap_pgoff+0x3af/0x500 [ 24.047355] do_syscall_64+0x3f/0x90 [ 24.047727] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.048238] [ 24.048404] The buggy address belongs to the object at ffff888018f3b570 [ 24.048404] which belongs to the cache vm_area_struct of size 168 [ 24.049584] The buggy address is located 88 bytes inside of [ 24.049584] freed 168-byte region [ffff888018f3b570, ffff888018f3b618) [ 24.050679] [ 24.050846] The buggy address belongs to the physical page: [ 24.051383] page:0000000013b0029c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18f3b [ 24.052245] memcg:ffff888018f32401 [ 24.052584] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.053138] page_type: 0xffffffff() [ 24.053489] raw: 0100000000000200 ffff8880087a0c80 ffffea00005ab100 000000000000000b [ 24.054228] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018f32401 [ 24.054958] page dumped because: kasan: bad access detected [ 24.055479] [ 24.055647] Memory state around the buggy address: [ 24.056095] ffff888018f3b480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.056781] ffff888018f3b500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.057466] >ffff888018f3b580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.058132] ^ [ 24.058642] ffff888018f3b600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.059317] ffff888018f3b680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.059974] ================================================================== [ 24.060841] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.307370] BUG: Bad rss-counter state mm:000000009a11d8c9 type:MM_FILEPAGES val:33 [ 26.308427] BUG: Bad rss-counter state mm:000000009a11d8c9 type:MM_ANONPAGES val:22 [ 26.797401] BUG: Bad rss-counter state mm:0000000029f7657a type:MM_FILEPAGES val:33 [ 26.798600] BUG: Bad rss-counter state mm:0000000029f7657a type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:39978' (ECDSA) to the list of known hosts. 2023/06/20 11:48:46 fuzzer started 2023/06/20 11:48:47 dialing manager at localhost:36067 2023/06/20 11:48:47 checking machine... 2023/06/20 11:48:47 checking revisions... [ 27.530399] kmemleak: Automatic memory scanning thread ended 2023/06/20 11:48:47 testing simple program... [ 27.591869] cgroup: Unknown subsys name 'net' [ 27.701236] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 11:48:46 Registers: info registers vcpu 0 RAX=000055fd9e833ee0 RBX=000055fd9e4aaa50 RCX=0000000000000000 RDX=0000000000000000 RSI=000055fd9e826e00 RDI=000055fd9e82aa20 RBP=00007f21d40049a0 RSP=00007f21dadf4800 R8 =00007f21d4004ba8 R9 =0000000000000000 R10=0000000000000009 R11=0000000000000286 R12=00007f21dadf48d0 R13=000055fd9e826e00 R14=0000000000000000 R15=000055fd9e82aa20 RIP=000055fd9e461682 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f21dadf5700 00000000 00000000 GS =0000 0000000000000000 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=00007f7f598d5390 CR3=000000000f3a0000 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=6e6f6373696420646576696563655220 XMM01=31313a34373138332074726f7020322e XMM02=63736964203a31313a34373138332074 XMM03=66207463656e6e6f6373696420646576 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732036343a38343a3131203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=000000000000000c RBX=0000000000000002 RCX=ffffffff8180c704 RDX=000000000000000c RSI=ffffffff86138eb0 RDI=ffffffff85dfe034 RBP=ffffffff85dfe034 RSP=ffff88806cf099b0 R8 =ffffffff86138eb0 R9 =ffff88806cf09aa8 R10=0000000000038001 R11=0000000000020d9c R12=ffffffff85dfe060 R13=ffffffff85dfe034 R14=ffffffff85dfe034 R15=dffffc0000000000 RIP=ffffffff8112fc49 RFL=00000287 [--S--PC] 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 00007f0ca709b900 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=00007f0ca7065008 CR3=0000000016756000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000