[ 30.847951] BUG: Bad rss-counter state mm:00000000d87a2a73 type:MM_FILEPAGES val:33 [ 30.849269] BUG: Bad rss-counter state mm:00000000d87a2a73 type:MM_ANONPAGES val:22 [ 31.030219] ================================================================== [ 31.031116] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.032058] Read of size 8 at addr ffff88801af9d3f8 by task sshd/218 [ 31.032841] [ 31.033062] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 31.034059] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.035034] Call Trace: [ 31.035356] <TASK> [ 31.035655] dump_stack_lvl+0x91/0xf0 [ 31.036153] print_report+0xcc/0x620 [ 31.036655] ? __virt_addr_valid+0x102/0x340 [ 31.037209] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.037827] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.038450] kasan_report+0xbe/0xf0 [ 31.038922] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.039551] vma_interval_tree_remove+0xc75/0xec0 [ 31.040158] vma_prepare+0xc54/0x11a0 [ 31.040650] __split_vma+0x5af/0x950 [ 31.041126] ? __pfx___split_vma+0x10/0x10 [ 31.041651] ? find_held_lock+0x2c/0x110 [ 31.042171] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.042736] ? lock_is_held_type+0x9f/0x120 [ 31.043276] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.043882] ? mtree_range_walk+0x632/0x900 [ 31.044461] ? mas_walk+0x5c7/0x7c0 [ 31.044940] do_vmi_munmap+0x1f1/0x2b0 [ 31.045431] mmap_region+0x1f9/0x2660 [ 31.045917] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.046427] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.047150] ? __pfx_lock_acquire+0x10/0x10 [ 31.047684] ? __pfx_mmap_region+0x10/0x10 [ 31.048211] ? security_mmap_addr+0x7d/0xa0 [ 31.048762] ? get_unmapped_area+0x1f5/0x3f0 [ 31.049315] do_mmap+0x854/0xf00 [ 31.049754] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.050246] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.050813] ksys_mmap_pgoff+0x3af/0x500 [ 31.051325] do_syscall_64+0x3f/0x90 [ 31.051806] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.052461] RIP: 0033:0x7efdddb03d82 [ 31.052916] 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 [ 31.055054] RSP: 002b:00007fff7e6a2328 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.055958] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007efdddb03d82 [ 31.056832] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007efddcf3d000 [ 31.057679] RBP: 00007efddcf3d000 R08: 0000000000000009 R09: 0000000000001000 [ 31.058524] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b239d30ec0 [ 31.059386] R13: 00007fff7e6a2340 R14: 00007fff7e6a2370 R15: 00007fff7e6a26d0 [ 31.060253] </TASK> [ 31.060551] [ 31.060767] Allocated by task 209: [ 31.061208] kasan_save_stack+0x22/0x50 [ 31.061712] kasan_set_track+0x25/0x30 [ 31.062200] __kasan_slab_alloc+0x59/0x70 [ 31.062727] kmem_cache_alloc+0x16b/0x370 [ 31.063245] vm_area_dup+0x20/0x160 [ 31.063702] __split_vma+0x170/0x950 [ 31.064177] split_vma+0xc6/0x110 [ 31.064642] mprotect_fixup+0x8d2/0xb30 [ 31.065147] do_mprotect_pkey+0x87e/0xd40 [ 31.065673] __x64_sys_mprotect+0x78/0xc0 [ 31.066196] do_syscall_64+0x3f/0x90 [ 31.066678] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.067321] [ 31.067534] Freed by task 209: [ 31.067932] kasan_save_stack+0x22/0x50 [ 31.068444] kasan_set_track+0x25/0x30 [ 31.068951] kasan_save_free_info+0x2b/0x50 [ 31.069487] __kasan_slab_free+0x10a/0x190 [ 31.070025] kmem_cache_free+0x10d/0x4d0 [ 31.070539] rcu_core+0x8c8/0x2860 [ 31.070984] __do_softirq+0x1b7/0x7d4 [ 31.071465] [ 31.071681] Last potentially related work creation: [ 31.072268] kasan_save_stack+0x22/0x50 [ 31.072796] __kasan_record_aux_stack+0x8e/0xa0 [ 31.073369] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.074026] remove_vma+0x139/0x170 [ 31.074531] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.075171] do_vmi_munmap+0x1f1/0x2b0 [ 31.075668] __vm_munmap+0x138/0x3a0 [ 31.076139] __x64_sys_munmap+0x59/0x80 [ 31.076648] do_syscall_64+0x3f/0x90 [ 31.077124] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.077774] [ 31.077989] The buggy address belongs to the object at ffff88801af9d3a0 [ 31.077989] which belongs to the cache vm_area_struct of size 168 [ 31.079454] The buggy address is located 88 bytes inside of [ 31.079454] freed 168-byte region [ffff88801af9d3a0, ffff88801af9d448) [ 31.080878] [ 31.081093] The buggy address belongs to the physical page: [ 31.081744] page:00000000d0fb1967 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1af9d [ 31.082852] memcg:ffff88801af75701 [ 31.083277] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.083941] page_type: 0xffffffff() [ 31.084427] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 31.085367] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801af75701 [ 31.086297] page dumped because: kasan: bad access detected [ 31.086963] [ 31.087179] Memory state around the buggy address: [ 31.087796] ffff88801af9d280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.088672] ffff88801af9d300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.089555] >ffff88801af9d380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.090436] ^ [ 31.091309] ffff88801af9d400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.092169] ffff88801af9d480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.093034] ================================================================== [ 31.093976] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.412871] BUG: Bad rss-counter state mm:000000009de94035 type:MM_FILEPAGES val:33 [ 33.414024] BUG: Bad rss-counter state mm:000000009de94035 type:MM_ANONPAGES val:22 [ 33.778370] BUG: Bad rss-counter state mm:000000002ae65771 type:MM_FILEPAGES val:33 [ 33.779934] BUG: Bad rss-counter state mm:000000002ae65771 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:2036' (ECDSA) to the list of known hosts. 2023/06/21 00:22:40 fuzzer started 2023/06/21 00:22:40 dialing manager at localhost:36067 2023/06/21 00:22:40 checking machine... 2023/06/21 00:22:40 checking revisions... [ 34.504307] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:22:40 testing simple program... [ 34.548575] cgroup: Unknown subsys name 'net' [ 34.600752] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:22:40 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=0000000000000000 RSI=000000000000013b RDI=ffff888016aba4c0 RBP=ffffffff849ef3a0 RSP=ffff88800f127988 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=000000000000013b R13=ffff888016ab9b40 R14=ffff888016ab9b40 R15=ffff88800f127db0 RIP=ffffffff8122e592 RFL=00000286 [--S--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 00007f25fbb9b900 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=00007ffc9122e000 CR3=0000000016640000 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=6c697473206e61632073726573552023 XMM01=20656c706f657020726568746f20776f XMM02=ffffffffffffff00ffff000000000000 XMM03=796e6120776f6c6c6120746f6e206f74 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ff0000ffffffff00ffffffffffffffff XMM08=00000000000000810000363532616873 XMM09=00000000000000000000000000000000 XMM10=00002020202020200020202020202020 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=00007fbcbec3b0b0 CR3=000000000ee06000 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=fe6ea32583509895b143d2cb147423e2 XMM02=000000000011a988ec2efd57dc4c00df XMM03=00000000001203585d1272bed71161a6 XMM04=7e6aa97fa9a6c6ae00000000000ae988 XMM05=9d3c8fd0244bfb8a0000000000131a60 XMM06=bdf2e299e47b49d500000000001310e8 XMM07=e042d86d42eb936e0000000000121678 XMM08=5d1272bed71161a6000000000011a9e8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000