syzkaller login: [ 35.921579] BUG: Bad rss-counter state mm:000000007b72c25f type:MM_FILEPAGES val:33 [ 35.923022] BUG: Bad rss-counter state mm:000000007b72c25f type:MM_ANONPAGES val:22 [ 35.963141] ================================================================== [ 35.964093] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.965055] Read of size 8 at addr ffff88800efe43f8 by task sshd/220 [ 35.965980] [ 35.966255] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.967159] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.968173] Call Trace: [ 35.968517] [ 35.968804] dump_stack_lvl+0x91/0xf0 [ 35.969313] print_report+0xcc/0x620 [ 35.969814] ? __virt_addr_valid+0x102/0x340 [ 35.970405] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.971028] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.971677] kasan_report+0xbe/0xf0 [ 35.972153] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.972791] vma_interval_tree_remove+0xc75/0xec0 [ 35.973414] vma_prepare+0xc54/0x11a0 [ 35.973896] __split_vma+0x5af/0x950 [ 35.974402] ? __pfx___split_vma+0x10/0x10 [ 35.974939] ? find_held_lock+0x2c/0x110 [ 35.975514] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.976095] ? lock_is_held_type+0x9f/0x120 [ 35.976647] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.977253] ? mtree_range_walk+0x632/0x900 [ 35.977835] ? mas_walk+0x5c7/0x7c0 [ 35.978320] do_vmi_munmap+0x1f1/0x2b0 [ 35.978835] mmap_region+0x1f9/0x2660 [ 35.979368] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.979885] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.980619] ? __pfx_lock_acquire+0x10/0x10 [ 35.981163] ? __pfx_mmap_region+0x10/0x10 [ 35.981712] ? security_mmap_addr+0x7d/0xa0 [ 35.982249] ? get_unmapped_area+0x1f5/0x3f0 [ 35.982840] do_mmap+0x854/0xf00 [ 35.983306] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.983817] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.984394] ksys_mmap_pgoff+0x3af/0x500 [ 35.984909] do_syscall_64+0x3f/0x90 [ 35.985411] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.986057] RIP: 0033:0x7fcc54a75d82 [ 35.986542] 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 [ 35.988717] RSP: 002b:00007ffe4ff4beb8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.989644] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fcc54a75d82 [ 35.990519] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fcc53eaf000 [ 35.991420] RBP: 00007fcc53eaf000 R08: 0000000000000009 R09: 0000000000001000 [ 35.992283] R10: 0000000000000812 R11: 0000000000000206 R12: 00005594b7191b20 [ 35.993150] R13: 00007ffe4ff4bed0 R14: 00007ffe4ff4bf00 R15: 00007ffe4ff4c260 [ 35.994028] [ 35.994345] [ 35.994582] Allocated by task 213: [ 35.995019] kasan_save_stack+0x22/0x50 [ 35.995563] kasan_set_track+0x25/0x30 [ 35.996073] __kasan_slab_alloc+0x59/0x70 [ 35.996621] kmem_cache_alloc+0x16b/0x370 [ 35.997152] vm_area_dup+0x20/0x160 [ 35.997626] __split_vma+0x170/0x950 [ 35.998103] split_vma+0xc6/0x110 [ 35.998575] mprotect_fixup+0x8d2/0xb30 [ 35.999100] do_mprotect_pkey+0x87e/0xd40 [ 35.999666] __x64_sys_mprotect+0x78/0xc0 [ 36.000199] do_syscall_64+0x3f/0x90 [ 36.000698] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.001367] [ 36.001589] Freed by task 213: [ 36.002000] kasan_save_stack+0x22/0x50 [ 36.002532] kasan_set_track+0x25/0x30 [ 36.003051] kasan_save_free_info+0x2b/0x50 [ 36.003625] __kasan_slab_free+0x10a/0x190 [ 36.004164] kmem_cache_free+0x10d/0x4d0 [ 36.004699] rcu_core+0x8c8/0x2860 [ 36.005153] __do_softirq+0x1b7/0x7d4 [ 36.005648] [ 36.005863] Last potentially related work creation: [ 36.006482] kasan_save_stack+0x22/0x50 [ 36.006992] __kasan_record_aux_stack+0x8e/0xa0 [ 36.007615] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.008266] remove_vma+0x139/0x170 [ 36.008742] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.009325] do_vmi_munmap+0x1f1/0x2b0 [ 36.009814] __vm_munmap+0x138/0x3a0 [ 36.010301] __x64_sys_munmap+0x59/0x80 [ 36.010840] do_syscall_64+0x3f/0x90 [ 36.011359] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.012019] [ 36.012236] Second to last potentially related work creation: [ 36.012955] kasan_save_stack+0x22/0x50 [ 36.013474] __kasan_record_aux_stack+0x8e/0xa0 [ 36.014062] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.014747] remove_vma+0x139/0x170 [ 36.015227] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.015820] do_vmi_munmap+0x1f1/0x2b0 [ 36.016329] mmap_region+0x1f9/0x2660 [ 36.016830] do_mmap+0x854/0xf00 [ 36.017282] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.017791] ksys_mmap_pgoff+0x3af/0x500 [ 36.018315] do_syscall_64+0x3f/0x90 [ 36.018828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.019531] [ 36.019754] The buggy address belongs to the object at ffff88800efe43a0 [ 36.019754] which belongs to the cache vm_area_struct of size 168 [ 36.021449] The buggy address is located 88 bytes inside of [ 36.021449] freed 168-byte region [ffff88800efe43a0, ffff88800efe4448) [ 36.023402] [ 36.023701] The buggy address belongs to the physical page: [ 36.024494] page:00000000e37b59d0 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xefe4 [ 36.025657] memcg:ffff88800de4b501 [ 36.026099] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.026870] page_type: 0xffffffff() [ 36.027372] raw: 0100000000000200 ffff88800879fc80 ffffea0000384c80 dead000000000004 [ 36.028345] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800de4b501 [ 36.029290] page dumped because: kasan: bad access detected [ 36.029989] [ 36.030215] Memory state around the buggy address: [ 36.030812] ffff88800efe4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 36.031710] ffff88800efe4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 36.032594] >ffff88800efe4380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 36.033487] ^ [ 36.034372] ffff88800efe4400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 36.035247] ffff88800efe4480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 36.036123] ================================================================== [ 36.037199] Disabling lock debugging due to kernel taint [ 37.826434] BUG: Bad rss-counter state mm:0000000078cccf53 type:MM_FILEPAGES val:33 [ 37.827098] BUG: Bad rss-counter state mm:0000000078cccf53 type:MM_ANONPAGES val:22 [ 38.259258] BUG: Bad rss-counter state mm:00000000345e84d6 type:MM_FILEPAGES val:33 [ 38.260257] BUG: Bad rss-counter state mm:00000000345e84d6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41815' (ECDSA) to the list of known hosts. 2023/06/19 14:24:20 fuzzer started 2023/06/19 14:24:20 dialing manager at localhost:44161 2023/06/19 14:24:20 checking machine... 2023/06/19 14:24:20 checking revisions... [ 39.011487] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:24:20 testing simple program... [ 39.049864] cgroup: Unknown subsys name 'net' [ 39.123213] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:24:15 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888016663680 RCX=0000000000000000 RDX=0000000000000000 RSI=ffffffff814c83e7 RDI=ffff888016663a74 RBP=00007f095e6fed77 RSP=ffff88801cdc78d0 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=00007f095e6fed77 R13=0000000000000000 R14=ffff888016663680 R15=ffff88800f066180 RIP=ffffffff8135bd1b RFL=00000217 [----APC] 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 00007f095e217900 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=00007f095e7ce618 CR3=000000000e9d4000 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=563412feff00545000000000000080fe XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff88806cf09a98 RCX=ffffffff86137501 RDX=1ffff1100d9e135e RSI=0000000000000000 RDI=ffffffff8180f43b RBP=ffff88806cf09af0 RSP=ffff88806cf09a80 R8 =ffffffff86137542 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888008d751c0 R15=ffff88800e919ec0 RIP=ffffffff81130399 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 =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=00007fd7766ff000 CR3=0000000019cde000 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=2030323a34323a3431203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732039313a34323a3431203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000