syzkaller login: [ 38.848256] BUG: Bad rss-counter state mm:00000000270a87c9 type:MM_FILEPAGES val:33 [ 38.849339] BUG: Bad rss-counter state mm:00000000270a87c9 type:MM_ANONPAGES val:22 [ 38.986573] ================================================================== [ 38.987494] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.988446] Read of size 8 at addr ffff88800ded8968 by task sshd/219 [ 38.989210] [ 38.989429] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 38.990402] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.991412] Call Trace: [ 38.991735] [ 38.992016] dump_stack_lvl+0x91/0xf0 [ 38.992508] print_report+0xcc/0x620 [ 38.992988] ? __virt_addr_valid+0x102/0x340 [ 38.993545] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.994160] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.994779] kasan_report+0xbe/0xf0 [ 38.995280] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.995898] vma_interval_tree_remove+0xc75/0xec0 [ 38.996506] vma_prepare+0xc54/0x11a0 [ 38.996992] __split_vma+0x5af/0x950 [ 38.997471] ? __pfx___split_vma+0x10/0x10 [ 38.998006] ? find_held_lock+0x2c/0x110 [ 38.998531] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.999092] ? lock_is_held_type+0x9f/0x120 [ 38.999639] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.000253] ? mtree_range_walk+0x632/0x900 [ 39.000811] ? mas_walk+0x5c7/0x7c0 [ 39.001288] do_vmi_munmap+0x1f1/0x2b0 [ 39.001780] mmap_region+0x1f9/0x2660 [ 39.002260] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.002771] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.003506] ? __pfx_lock_acquire+0x10/0x10 [ 39.004043] ? __pfx_mmap_region+0x10/0x10 [ 39.004569] ? security_mmap_addr+0x7d/0xa0 [ 39.005098] ? get_unmapped_area+0x1f5/0x3f0 [ 39.005648] do_mmap+0x854/0xf00 [ 39.006083] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.006588] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.007156] ksys_mmap_pgoff+0x3af/0x500 [ 39.007682] do_syscall_64+0x3f/0x90 [ 39.008163] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.008814] RIP: 0033:0x7f12b677cd82 [ 39.009265] 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 [ 39.011398] RSP: 002b:00007ffd2ac558d8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.012313] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f12b677cd82 [ 39.013157] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f12b5bb6000 [ 39.014006] RBP: 00007f12b5bb6000 R08: 0000000000000009 R09: 0000000000001000 [ 39.014857] R10: 0000000000000812 R11: 0000000000000206 R12: 000055826d3d3b20 [ 39.015739] R13: 00007ffd2ac558f0 R14: 00007ffd2ac55920 R15: 00007ffd2ac55c80 [ 39.016606] [ 39.016899] [ 39.017108] Allocated by task 212: [ 39.017579] kasan_save_stack+0x22/0x50 [ 39.018073] kasan_set_track+0x25/0x30 [ 39.018554] __kasan_slab_alloc+0x59/0x70 [ 39.019067] kmem_cache_alloc+0x16b/0x370 [ 39.019578] vm_area_dup+0x20/0x160 [ 39.020041] __split_vma+0x170/0x950 [ 39.020517] split_vma+0xc6/0x110 [ 39.020963] mprotect_fixup+0x8d2/0xb30 [ 39.021467] do_mprotect_pkey+0x87e/0xd40 [ 39.021988] __x64_sys_mprotect+0x78/0xc0 [ 39.022507] do_syscall_64+0x3f/0x90 [ 39.022972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.023607] [ 39.023814] Freed by task 212: [ 39.024197] kasan_save_stack+0x22/0x50 [ 39.024689] kasan_set_track+0x25/0x30 [ 39.025165] kasan_save_free_info+0x2b/0x50 [ 39.025685] __kasan_slab_free+0x10a/0x190 [ 39.026199] kmem_cache_free+0x10d/0x4d0 [ 39.026690] rcu_core+0x8c8/0x2860 [ 39.027120] __do_softirq+0x1b7/0x7d4 [ 39.027592] [ 39.027804] Last potentially related work creation: [ 39.028377] kasan_save_stack+0x22/0x50 [ 39.028865] __kasan_record_aux_stack+0x8e/0xa0 [ 39.029422] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.030050] remove_vma+0x139/0x170 [ 39.030488] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.031069] do_vmi_munmap+0x1f1/0x2b0 [ 39.031548] __vm_munmap+0x138/0x3a0 [ 39.031999] __x64_sys_munmap+0x59/0x80 [ 39.032478] do_syscall_64+0x3f/0x90 [ 39.032937] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.033565] [ 39.033776] Second to last potentially related work creation: [ 39.034437] kasan_save_stack+0x22/0x50 [ 39.034933] __kasan_record_aux_stack+0x8e/0xa0 [ 39.035506] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.036138] remove_vma+0x139/0x170 [ 39.036580] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.037125] do_vmi_munmap+0x1f1/0x2b0 [ 39.037595] mmap_region+0x1f9/0x2660 [ 39.038066] do_mmap+0x854/0xf00 [ 39.038482] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.038956] ksys_mmap_pgoff+0x3af/0x500 [ 39.039447] do_syscall_64+0x3f/0x90 [ 39.039904] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.040530] [ 39.040739] The buggy address belongs to the object at ffff88800ded8910 [ 39.040739] which belongs to the cache vm_area_struct of size 168 [ 39.042158] The buggy address is located 88 bytes inside of [ 39.042158] freed 168-byte region [ffff88800ded8910, ffff88800ded89b8) [ 39.043522] [ 39.043735] The buggy address belongs to the physical page: [ 39.044372] page:0000000082d9c87b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xded8 [ 39.045416] memcg:ffff88800f2c8501 [ 39.045835] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.046519] page_type: 0xffffffff() [ 39.046954] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a0c00 dead000000000007 [ 39.047857] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f2c8501 [ 39.048735] page dumped because: kasan: bad access detected [ 39.049372] [ 39.049581] Memory state around the buggy address: [ 39.050141] ffff88800ded8800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 39.050970] ffff88800ded8880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 39.051810] >ffff88800ded8900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 39.052631] ^ [ 39.053394] ffff88800ded8980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc 00 [ 39.054220] ffff88800ded8a00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.055045] ================================================================== [ 39.055933] Disabling lock debugging due to kernel taint [ 41.004139] BUG: Bad rss-counter state mm:000000009c9b1fa6 type:MM_FILEPAGES val:33 [ 41.005471] BUG: Bad rss-counter state mm:000000009c9b1fa6 type:MM_ANONPAGES val:22 [ 41.448065] BUG: Bad rss-counter state mm:000000001da52236 type:MM_FILEPAGES val:33 [ 41.449692] BUG: Bad rss-counter state mm:000000001da52236 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:60253' (ECDSA) to the list of known hosts. 2023/06/21 03:00:24 fuzzer started 2023/06/21 03:00:25 dialing manager at localhost:36067 2023/06/21 03:00:25 checking machine... 2023/06/21 03:00:25 checking revisions... [ 42.141540] kmemleak: Automatic memory scanning thread ended 2023/06/21 03:00:25 testing simple program... [ 42.191901] cgroup: Unknown subsys name 'net' [ 42.230313] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 03:00:24 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=ffff88806ce09a50 RCX=0000000000000001 RDX=1ffff1100d9c1355 RSI=ffff88800d8af518 RDI=ffffffff813ad720 RBP=ffff88806ce09aa8 RSP=ffff88806ce09a30 R8 =0000000000000001 R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000003c0d R12=ffff88806ce09b18 R13=0000000000000000 R14=ffff8880159651c0 R15=ffff88800967b500 RIP=ffffffff811fc8a2 RFL=00000202 [-------] 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 00007f3388626900 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=00007f3387a94560 CR3=0000000009a4a000 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=2d385b5bdc6f4e9e00000000000ae988 XMM05=ba64eed68abb016e00000000001337c0 XMM06=806171799158d96700000000001324f0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=fffffbfff0ba7a6a RBX=fffffbfff0ba7a6b RCX=ffffffff812d8f13 RDX=fffffbfff0ba7a6b RSI=0000000000000008 RDI=ffffffff85d3d350 RBP=fffffbfff0ba7a6a RSP=ffff8880166b7ba8 R8 =0000000000000000 R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=000000000000e988 R12=0000000000000000 R13=0000000000000000 R14=ffff88800f0d3d48 R15=0000000000000000 RIP=ffffffff8180f186 RFL=00000082 [--S----] 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 00007f34daa15900 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=00007ffdf9fd96d8 CR3=000000001a2ce000 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=00007fdf754a9510000055c1b9f64790 XMM02=6f6974707972636e6561737268746977 XMM03=00000000000000000000000000777074 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=ffffffffffff00ffffff00ffffff00ff XMM08=00002000000000202020002020200000 XMM09=ffffffffffff00ffffff00ffffff00ff XMM10=00002000000000202020002020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000