syzkaller login: [ 44.775302] BUG: Bad rss-counter state mm:00000000d4979e4b type:MM_FILEPAGES val:33 [ 44.776348] BUG: Bad rss-counter state mm:00000000d4979e4b type:MM_ANONPAGES val:22 [ 44.918468] ================================================================== [ 44.919420] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.921200] Read of size 8 at addr ffff88800fcc53f8 by task sshd/220 [ 44.921851] [ 44.921995] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.922819] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.923587] Call Trace: [ 44.924051] [ 44.924295] dump_stack_lvl+0x91/0xf0 [ 44.924642] print_report+0xcc/0x620 [ 44.925159] ? __virt_addr_valid+0x102/0x340 [ 44.925618] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.926269] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.926683] kasan_report+0xbe/0xf0 [ 44.927183] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.927638] vma_interval_tree_remove+0xc75/0xec0 [ 44.929128] vma_prepare+0xc54/0x11a0 [ 44.929567] __split_vma+0x5af/0x950 [ 44.932595] ? __pfx___split_vma+0x10/0x10 [ 44.932899] ? find_held_lock+0x2c/0x110 [ 44.933233] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.933530] ? lock_is_held_type+0x9f/0x120 [ 44.933843] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.934192] ? mtree_range_walk+0x632/0x900 [ 44.934482] ? mas_walk+0x5c7/0x7c0 [ 44.934757] do_vmi_munmap+0x1f1/0x2b0 [ 44.935020] mmap_region+0x1f9/0x2660 [ 44.935314] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.935601] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.935993] ? __pfx_lock_acquire+0x10/0x10 [ 44.936305] ? __pfx_mmap_region+0x10/0x10 [ 44.936695] ? security_mmap_addr+0x7d/0xa0 [ 44.937094] ? get_unmapped_area+0x1f5/0x3f0 [ 44.937510] do_mmap+0x854/0xf00 [ 44.937851] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.938232] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.938604] ksys_mmap_pgoff+0x3af/0x500 [ 44.938956] do_syscall_64+0x3f/0x90 [ 44.939278] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.939695] RIP: 0033:0x7fc36c6f9d82 [ 44.940011] 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 [ 44.941585] RSP: 002b:00007ffc8de7ea48 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.942286] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc36c6f9d82 [ 44.942895] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc36bb33000 [ 44.943532] RBP: 00007fc36bb33000 R08: 0000000000000009 R09: 0000000000001000 [ 44.944155] R10: 0000000000000812 R11: 0000000000000206 R12: 0000560867d58ec0 [ 44.944813] R13: 00007ffc8de7ea60 R14: 00007ffc8de7ea90 R15: 00007ffc8de7edf0 [ 44.945442] [ 44.945640] [ 44.945803] Allocated by task 213: [ 44.946133] kasan_save_stack+0x22/0x50 [ 44.946517] kasan_set_track+0x25/0x30 [ 44.946852] __kasan_slab_alloc+0x59/0x70 [ 44.947190] kmem_cache_alloc+0x16b/0x370 [ 44.947533] vm_area_dup+0x20/0x160 [ 44.947862] __split_vma+0x170/0x950 [ 44.948205] split_vma+0xc6/0x110 [ 44.948691] mprotect_fixup+0x8d2/0xb30 [ 44.949023] do_mprotect_pkey+0x87e/0xd40 [ 44.949458] __x64_sys_mprotect+0x78/0xc0 [ 44.949823] do_syscall_64+0x3f/0x90 [ 44.950197] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.950685] [ 44.950834] Freed by task 213: [ 44.951125] kasan_save_stack+0x22/0x50 [ 44.951524] kasan_set_track+0x25/0x30 [ 44.952164] kasan_save_free_info+0x2b/0x50 [ 44.953177] __kasan_slab_free+0x10a/0x190 [ 44.954196] kmem_cache_free+0x10d/0x4d0 [ 44.955129] rcu_core+0x8c8/0x2860 [ 44.955960] __do_softirq+0x1b7/0x7d4 [ 44.956873] [ 44.957251] Last potentially related work creation: [ 44.958394] kasan_save_stack+0x22/0x50 [ 44.959334] __kasan_record_aux_stack+0x8e/0xa0 [ 44.960426] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.961621] remove_vma+0x139/0x170 [ 44.962466] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.963481] do_vmi_munmap+0x1f1/0x2b0 [ 44.964511] __vm_munmap+0x138/0x3a0 [ 44.965363] __x64_sys_munmap+0x59/0x80 [ 44.966347] do_syscall_64+0x3f/0x90 [ 44.967236] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.968472] [ 44.968838] The buggy address belongs to the object at ffff88800fcc53a0 [ 44.968838] which belongs to the cache vm_area_struct of size 168 [ 44.971801] The buggy address is located 88 bytes inside of [ 44.971801] freed 168-byte region [ffff88800fcc53a0, ffff88800fcc5448) [ 44.974618] [ 44.974976] The buggy address belongs to the physical page: [ 44.976250] page:000000008cf01b4b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcc5 [ 44.978370] memcg:ffff888009028201 [ 44.979109] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.980397] page_type: 0xffffffff() [ 44.981219] raw: 0100000000000200 ffff88800879fc80 ffffea000040f580 dead000000000008 [ 44.982976] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009028201 [ 44.984831] page dumped because: kasan: bad access detected [ 44.986118] [ 44.986558] Memory state around the buggy address: [ 44.987678] ffff88800fcc5280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 44.989351] ffff88800fcc5300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 44.991006] >ffff88800fcc5380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 44.992662] ^ [ 44.994283] ffff88800fcc5400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 44.995899] ffff88800fcc5480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.997586] ================================================================== [ 44.999279] Disabling lock debugging due to kernel taint [ 48.308976] BUG: Bad rss-counter state mm:00000000ab6fbcc1 type:MM_FILEPAGES val:33 [ 48.310332] BUG: Bad rss-counter state mm:00000000ab6fbcc1 type:MM_ANONPAGES val:22 [ 49.251728] BUG: Bad rss-counter state mm:00000000a1ff64c8 type:MM_FILEPAGES val:33 [ 49.252684] BUG: Bad rss-counter state mm:00000000a1ff64c8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10075' (ECDSA) to the list of known hosts. 2023/06/20 09:55:43 fuzzer started 2023/06/20 09:55:43 dialing manager at localhost:44161 2023/06/20 09:55:43 checking machine... 2023/06/20 09:55:43 checking revisions... [ 50.096155] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:55:43 testing simple program... [ 50.135726] cgroup: Unknown subsys name 'net' [ 50.230732] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:55:28 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff86055ea4 RCX=ffffffff8661f20e RDX=000000000000000a RSI=ffffffff860723cc RDI=ffffffff85d793d4 RBP=ffffffff86055e78 RSP=ffff88806ce099e0 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b5420 R12=ffffffff86055ea0 R13=ffffffff85d793d4 R14=ffffffff86055e74 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000216 [----AP-] 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 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=00007ffeb5627878 CR3=0000000005482000 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=00007f2f65347510000055c51139c790 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 info registers vcpu 1 RAX=1ffff11001bd49b5 RBX=ffff88800dea4d78 RCX=ffffffff812e00e5 RDX=0000000000000000 RSI=0000000000000000 RDI=ffff88800dea4db0 RBP=ffff88800de6f0c8 RSP=ffff888015a67c38 R8 =0000000000000001 R9 =ffffed1002b4cf7b R10=0000000000000003 R11=00000000000b6996 R12=dffffc0000000000 R13=ffff88800e07d400 R14=ffffffff81ef13be R15=ffff88800e774400 RIP=ffffffff81846375 RFL=00000083 [--S---C] 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=00007fa268999328 CR3=0000000005482000 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