[ 26.539961] BUG: Bad rss-counter state mm:00000000c9d7d9bd type:MM_FILEPAGES val:33 [ 26.541089] BUG: Bad rss-counter state mm:00000000c9d7d9bd type:MM_ANONPAGES val:22 [ 26.701133] ================================================================== [ 26.702232] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 26.703329] Read of size 8 at addr ffff888016f73228 by task sshd/219 [ 26.704415] [ 26.704679] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 26.705559] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 26.706558] Call Trace: [ 26.706875] [ 26.707157] dump_stack_lvl+0x91/0xf0 [ 26.707643] print_report+0xcc/0x620 [ 26.708120] ? __virt_addr_valid+0x102/0x340 [ 26.708669] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.709294] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.709911] kasan_report+0xbe/0xf0 [ 26.710389] ? vma_interval_tree_remove+0xc75/0xec0 [ 26.711018] vma_interval_tree_remove+0xc75/0xec0 [ 26.711650] vma_prepare+0xc54/0x11a0 [ 26.712152] __split_vma+0x5af/0x950 [ 26.712647] ? __pfx___split_vma+0x10/0x10 [ 26.713222] ? find_held_lock+0x2c/0x110 [ 26.713767] do_vmi_align_munmap+0x2ba/0x11f0 [ 26.714355] ? lock_is_held_type+0x9f/0x120 [ 26.714907] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 26.715544] ? mtree_range_walk+0x632/0x900 [ 26.716120] ? mas_walk+0x5c7/0x7c0 [ 26.716612] do_vmi_munmap+0x1f1/0x2b0 [ 26.717140] mmap_region+0x1f9/0x2660 [ 26.717640] ? vm_mmap_pgoff+0x15c/0x3a0 [ 26.718164] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 26.718920] ? __pfx_lock_acquire+0x10/0x10 [ 26.719480] ? __pfx_mmap_region+0x10/0x10 [ 26.720033] ? security_mmap_addr+0x7d/0xa0 [ 26.720584] ? get_unmapped_area+0x1f5/0x3f0 [ 26.721188] do_mmap+0x854/0xf00 [ 26.721645] vm_mmap_pgoff+0x1a6/0x3a0 [ 26.722165] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 26.722750] ksys_mmap_pgoff+0x3af/0x500 [ 26.723283] do_syscall_64+0x3f/0x90 [ 26.723775] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.724443] RIP: 0033:0x7fcba5f01d82 [ 26.724937] 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 [ 26.727153] RSP: 002b:00007ffd7fff02b8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 26.728097] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcba5f01d82 [ 26.728983] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcba533b000 [ 26.729867] RBP: 00007fcba533b000 R08: 0000000000000009 R09: 0000000000001000 [ 26.730751] R10: 0000000000000812 R11: 0000000000000206 R12: 000055e0857a6ec0 [ 26.731630] R13: 00007ffd7fff02d0 R14: 00007ffd7fff0300 R15: 00007ffd7fff0660 [ 26.732519] [ 26.732824] [ 26.733069] Allocated by task 210: [ 26.733515] kasan_save_stack+0x22/0x50 [ 26.734033] kasan_set_track+0x25/0x30 [ 26.734539] __kasan_slab_alloc+0x59/0x70 [ 26.735079] kmem_cache_alloc+0x16b/0x370 [ 26.735613] vm_area_dup+0x20/0x160 [ 26.736086] __split_vma+0x170/0x950 [ 26.736579] split_vma+0xc6/0x110 [ 26.737047] mprotect_fixup+0x8d2/0xb30 [ 26.737575] do_mprotect_pkey+0x87e/0xd40 [ 26.738160] __x64_sys_mprotect+0x78/0xc0 [ 26.738764] do_syscall_64+0x3f/0x90 [ 26.739306] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.740056] [ 26.740309] Freed by task 210: [ 26.740761] kasan_save_stack+0x22/0x50 [ 26.741359] kasan_set_track+0x25/0x30 [ 26.741942] kasan_save_free_info+0x2b/0x50 [ 26.742561] __kasan_slab_free+0x10a/0x190 [ 26.743184] kmem_cache_free+0x10d/0x4d0 [ 26.743774] rcu_core+0x8c8/0x2860 [ 26.744287] __do_softirq+0x1b7/0x7d4 [ 26.744836] [ 26.745101] Last potentially related work creation: [ 26.745878] kasan_save_stack+0x22/0x50 [ 26.746481] __kasan_record_aux_stack+0x8e/0xa0 [ 26.747122] __call_rcu_common.constprop.0+0x6a/0xb90 [ 26.747794] remove_vma+0x139/0x170 [ 26.748267] do_vmi_align_munmap+0xd4a/0x11f0 [ 26.748840] do_vmi_munmap+0x1f1/0x2b0 [ 26.749368] __vm_munmap+0x138/0x3a0 [ 26.749855] __x64_sys_munmap+0x59/0x80 [ 26.750376] do_syscall_64+0x3f/0x90 [ 26.750879] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 26.751555] [ 26.751776] The buggy address belongs to the object at ffff888016f731d0 [ 26.751776] which belongs to the cache vm_area_struct of size 168 [ 26.753310] The buggy address is located 88 bytes inside of [ 26.753310] freed 168-byte region [ffff888016f731d0, ffff888016f73278) [ 26.754769] [ 26.754994] The buggy address belongs to the physical page: [ 26.755676] page:00000000aec5432e refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16f73 [ 26.756818] memcg:ffff88800d52f801 [ 26.757288] flags: 0x100000000000200(slab|node=0|zone=1) [ 26.757964] page_type: 0xffffffff() [ 26.758443] raw: 0100000000000200 ffff88800879fc80 ffffea000051afc0 dead00000000000a [ 26.759416] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d52f801 [ 26.760369] page dumped because: kasan: bad access detected [ 26.761079] [ 26.761301] Memory state around the buggy address: [ 26.761911] ffff888016f73100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 26.762803] ffff888016f73180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 26.763695] >ffff888016f73200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 26.764580] ^ [ 26.765173] ffff888016f73280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 26.766072] ffff888016f73300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 26.766965] ================================================================== [ 26.767937] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.728651] BUG: Bad rss-counter state mm:00000000da72e746 type:MM_FILEPAGES val:33 [ 28.730176] BUG: Bad rss-counter state mm:00000000da72e746 type:MM_ANONPAGES val:22 [ 29.320123] BUG: Bad rss-counter state mm:00000000a2bd9c93 type:MM_FILEPAGES val:33 [ 29.321479] BUG: Bad rss-counter state mm:00000000a2bd9c93 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62590' (ECDSA) to the list of known hosts. 2023/06/19 20:30:28 fuzzer started 2023/06/19 20:30:29 dialing manager at localhost:44161 2023/06/19 20:30:29 checking machine... 2023/06/19 20:30:29 checking revisions... [ 29.967803] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:30:29 testing simple program... [ 30.014407] cgroup: Unknown subsys name 'net' [ 30.053369] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:30:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=1ffff110028dff2a RCX=0000000000000001 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff888016a87298 RBP=0000000000000001 RSP=ffff8880146ff940 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000010000 R11=00000000000b6c88 R12=0000000000000001 R13=0000000000000000 R14=ffff888016a87298 R15=0000000000000000 RIP=ffffffff812d8e5d RFL=00000212 [----A--] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f16c9ad7900 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=00007f16c8f47e50 CR3=000000000d78c000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=7f5eeb2fa66b453a00000000000ae988 XMM05=be42086a79fd7ba90000000000134268 XMM06=806171799158d9670000000000132f98 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff844bfa24 RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff11002d87e15 RSI=ffffffff844bfa24 RDI=ffff888016c3f118 RBP=ffff888016c3f0e8 RSP=ffff888016c3f048 R8 =0000000000000001 R9 =ffff888016c3f090 R10=0000000000038001 R11=00000000000b3b3c R12=ffff888016c3f118 R13=0000000000000000 R14=ffff888019f21b40 R15=0000000000000000 RIP=ffffffff84532440 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 00007faf690cb900 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=00007faf690aa020 CR3=000000000df34000 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