[ 23.669356] BUG: Bad rss-counter state mm:00000000db873afe type:MM_FILEPAGES val:33 [ 23.670538] BUG: Bad rss-counter state mm:00000000db873afe type:MM_ANONPAGES val:22 [ 23.710976] ================================================================== [ 23.711867] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.712892] Read of size 8 at addr ffff888018e76df0 by task sshd/219 [ 23.713647] [ 23.713863] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.714750] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.715733] Call Trace: [ 23.716050] <TASK> [ 23.716329] dump_stack_lvl+0x91/0xf0 [ 23.716819] print_report+0xcc/0x620 [ 23.717294] ? __virt_addr_valid+0x102/0x340 [ 23.717837] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.718443] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.719050] kasan_report+0xbe/0xf0 [ 23.719522] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.720133] vma_interval_tree_remove+0xc75/0xec0 [ 23.720738] vma_prepare+0xc54/0x11a0 [ 23.721218] __split_vma+0x5af/0x950 [ 23.721684] ? __pfx___split_vma+0x10/0x10 [ 23.722212] ? find_held_lock+0x2c/0x110 [ 23.722732] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.723302] ? lock_is_held_type+0x9f/0x120 [ 23.723850] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.724450] ? mtree_range_walk+0x632/0x900 [ 23.725007] ? mas_walk+0x5c7/0x7c0 [ 23.725480] do_vmi_munmap+0x1f1/0x2b0 [ 23.725967] mmap_region+0x1f9/0x2660 [ 23.726450] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.726955] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.727691] ? __pfx_lock_acquire+0x10/0x10 [ 23.728228] ? __pfx_mmap_region+0x10/0x10 [ 23.728761] ? security_mmap_addr+0x7d/0xa0 [ 23.729293] ? get_unmapped_area+0x1f5/0x3f0 [ 23.729848] do_mmap+0x854/0xf00 [ 23.730286] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.730786] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.731339] ksys_mmap_pgoff+0x3af/0x500 [ 23.731855] do_syscall_64+0x3f/0x90 [ 23.732330] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.732976] RIP: 0033:0x7f3b86ef6d82 [ 23.733435] 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 [ 23.735556] RSP: 002b:00007ffdef7aedc8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.736447] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3b86ef6d82 [ 23.737296] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3b86330000 [ 23.738140] RBP: 00007f3b86330000 R08: 0000000000000009 R09: 0000000000001000 [ 23.738977] R10: 0000000000000812 R11: 0000000000000206 R12: 00005639f5c50ec0 [ 23.739854] R13: 00007ffdef7aede0 R14: 00007ffdef7aee10 R15: 00007ffdef7af170 [ 23.740704] </TASK> [ 23.741002] [ 23.741218] Allocated by task 212: [ 23.741652] kasan_save_stack+0x22/0x50 [ 23.742148] kasan_set_track+0x25/0x30 [ 23.742637] __kasan_slab_alloc+0x59/0x70 [ 23.743159] kmem_cache_alloc+0x16b/0x370 [ 23.743678] vm_area_dup+0x20/0x160 [ 23.744135] __split_vma+0x170/0x950 [ 23.744604] split_vma+0xc6/0x110 [ 23.745041] mprotect_fixup+0x8d2/0xb30 [ 23.745544] do_mprotect_pkey+0x87e/0xd40 [ 23.746062] __x64_sys_mprotect+0x78/0xc0 [ 23.746580] do_syscall_64+0x3f/0x90 [ 23.747058] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.747710] [ 23.747927] Freed by task 212: [ 23.748318] kasan_save_stack+0x22/0x50 [ 23.748826] kasan_set_track+0x25/0x30 [ 23.749317] kasan_save_free_info+0x2b/0x50 [ 23.749847] __kasan_slab_free+0x10a/0x190 [ 23.750372] kmem_cache_free+0x10d/0x4d0 [ 23.750879] rcu_core+0x8c8/0x2860 [ 23.751321] __do_softirq+0x1b7/0x7d4 [ 23.751818] [ 23.752032] Last potentially related work creation: [ 23.752618] kasan_save_stack+0x22/0x50 [ 23.753113] __kasan_record_aux_stack+0x8e/0xa0 [ 23.753690] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.754328] remove_vma+0x139/0x170 [ 23.754776] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.755331] do_vmi_munmap+0x1f1/0x2b0 [ 23.755818] __vm_munmap+0x138/0x3a0 [ 23.756284] __x64_sys_munmap+0x59/0x80 [ 23.756778] do_syscall_64+0x3f/0x90 [ 23.757251] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.757898] [ 23.758118] The buggy address belongs to the object at ffff888018e76d98 [ 23.758118] which belongs to the cache vm_area_struct of size 168 [ 23.759593] The buggy address is located 88 bytes inside of [ 23.759593] freed 168-byte region [ffff888018e76d98, ffff888018e76e40) [ 23.760988] [ 23.761205] The buggy address belongs to the physical page: [ 23.761855] page:000000006095adb2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18e76 [ 23.762954] memcg:ffff88800cbdca01 [ 23.763375] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.764032] page_type: 0xffffffff() [ 23.764477] raw: 0100000000000200 ffff8880087a0c80 ffffea0000351300 dead000000000002 [ 23.765382] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800cbdca01 [ 23.766281] page dumped because: kasan: bad access detected [ 23.766934] [ 23.767147] Memory state around the buggy address: [ 23.767727] ffff888018e76c80: fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb [ 23.768576] ffff888018e76d00: fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc [ 23.769421] >ffff888018e76d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 23.770275] ^ [ 23.771078] ffff888018e76e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 23.771945] ffff888018e76e80: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.772783] ================================================================== [ 23.773942] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.605000] BUG: Bad rss-counter state mm:00000000feb71c23 type:MM_FILEPAGES val:33 [ 25.606448] BUG: Bad rss-counter state mm:00000000feb71c23 type:MM_ANONPAGES val:22 [ 26.083756] BUG: Bad rss-counter state mm:00000000774505f4 type:MM_FILEPAGES val:33 [ 26.084764] BUG: Bad rss-counter state mm:00000000774505f4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45384' (ECDSA) to the list of known hosts. 2023/06/21 00:47:05 fuzzer started 2023/06/21 00:47:05 dialing manager at localhost:36067 2023/06/21 00:47:05 checking machine... 2023/06/21 00:47:05 checking revisions... [ 26.815203] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:47:05 testing simple program... [ 26.873279] cgroup: Unknown subsys name 'net' [ 26.923669] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:47:05 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11002cfeecf RSI=ffffffff81808488 RDI=ffff8880167f76e8 RBP=ffff8880167f76b8 RSP=ffff8880167f7610 R8 =0000000000000001 R9 =ffff8880167f7660 R10=0000000000038001 R11=0000000000021eef R12=ffff8880167f76e8 R13=0000000000000000 R14=ffff88800c4451c0 R15=ffff888016c07720 RIP=ffffffff813ad47f 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 00007fb375fc5900 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=00007fb37657a650 CR3=000000001a2f4000 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=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=ffbc64ffffbc44ffffbc34ffffbc9f00 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=ffff888008c04400 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=00007f29fb5e3d00 CR3=000000000c790000 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=0426a354dfc01585124a9fd7d5725512 XMM02=000000000011d738eff9b2d0a8fce9cb XMM03=000000000011d8082c67c8bc2e329bc3 XMM04=9da9757fe013071b00000000000ae988 XMM05=9e75801da177d3ba00000000001320f0 XMM06=806171799158d9670000000000130e20 XMM07=e042d86d42eb936e00000000001216f0 XMM08=9fe5d990fa961f30000000000011d808 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000