syzkaller login: [ 68.865951] sshd (219) used greatest stack depth: 24128 bytes left [ 68.867417] BUG: Bad rss-counter state mm:0000000085228446 type:MM_FILEPAGES val:33 [ 68.869117] BUG: Bad rss-counter state mm:0000000085228446 type:MM_ANONPAGES val:22 [ 69.027891] ================================================================== [ 69.028816] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 69.029768] Read of size 8 at addr ffff888015f43968 by task sshd/227 [ 69.030539] [ 69.030757] CPU: 1 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 69.031770] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 69.032775] Call Trace: [ 69.033098] [ 69.033388] dump_stack_lvl+0x91/0xf0 [ 69.033903] print_report+0xcc/0x620 [ 69.034391] ? __virt_addr_valid+0x102/0x340 [ 69.034974] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.035600] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.036216] kasan_report+0xbe/0xf0 [ 69.036716] ? vma_interval_tree_remove+0xc75/0xec0 [ 69.037344] vma_interval_tree_remove+0xc75/0xec0 [ 69.037950] vma_prepare+0xc54/0x11a0 [ 69.038431] __split_vma+0x5af/0x950 [ 69.038906] ? __pfx___split_vma+0x10/0x10 [ 69.039438] ? find_held_lock+0x2c/0x110 [ 69.039952] do_vmi_align_munmap+0x2ba/0x11f0 [ 69.040540] ? lock_is_held_type+0x9f/0x120 [ 69.041085] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 69.041699] ? mtree_range_walk+0x632/0x900 [ 69.042259] ? mas_walk+0x5c7/0x7c0 [ 69.042761] do_vmi_munmap+0x1f1/0x2b0 [ 69.043253] mmap_region+0x1f9/0x2660 [ 69.043746] ? vm_mmap_pgoff+0x15c/0x3a0 [ 69.044258] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 69.044983] ? __pfx_lock_acquire+0x10/0x10 [ 69.045517] ? __pfx_mmap_region+0x10/0x10 [ 69.046044] ? security_mmap_addr+0x7d/0xa0 [ 69.046581] ? get_unmapped_area+0x1f5/0x3f0 [ 69.047127] do_mmap+0x854/0xf00 [ 69.047568] vm_mmap_pgoff+0x1a6/0x3a0 [ 69.048064] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 69.048657] ksys_mmap_pgoff+0x3af/0x500 [ 69.049169] do_syscall_64+0x3f/0x90 [ 69.049654] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.050318] RIP: 0033:0x7fe5b69e7d82 [ 69.050797] 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 [ 69.053077] RSP: 002b:00007ffd63c0e498 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 69.054246] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe5b69e7d82 [ 69.055356] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe5b5e21000 [ 69.056465] RBP: 00007fe5b5e21000 R08: 0000000000000009 R09: 0000000000001000 [ 69.057610] R10: 0000000000000812 R11: 0000000000000206 R12: 000055afb87cfec0 [ 69.058698] R13: 00007ffd63c0e4b0 R14: 00007ffd63c0e4e0 R15: 00007ffd63c0e840 [ 69.059826] [ 69.060218] [ 69.060510] Allocated by task 219: [ 69.061062] kasan_save_stack+0x22/0x50 [ 69.061723] kasan_set_track+0x25/0x30 [ 69.062370] __kasan_slab_alloc+0x59/0x70 [ 69.063068] kmem_cache_alloc+0x16b/0x370 [ 69.063735] vm_area_dup+0x20/0x160 [ 69.064327] __split_vma+0x170/0x950 [ 69.065037] split_vma+0xc6/0x110 [ 69.065570] mprotect_fixup+0x8d2/0xb30 [ 69.066221] do_mprotect_pkey+0x87e/0xd40 [ 69.066866] __x64_sys_mprotect+0x78/0xc0 [ 69.067482] do_syscall_64+0x3f/0x90 [ 69.068045] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.068845] [ 69.069105] Freed by task 219: [ 69.069577] kasan_save_stack+0x22/0x50 [ 69.070178] kasan_set_track+0x25/0x30 [ 69.070834] kasan_save_free_info+0x2b/0x50 [ 69.071466] __kasan_slab_free+0x10a/0x190 [ 69.072092] kmem_cache_free+0x10d/0x4d0 [ 69.072807] rcu_core+0x8c8/0x2860 [ 69.073369] __do_softirq+0x1b7/0x7d4 [ 69.073856] [ 69.074068] Last potentially related work creation: [ 69.074685] kasan_save_stack+0x22/0x50 [ 69.075186] __kasan_record_aux_stack+0x8e/0xa0 [ 69.075758] __call_rcu_common.constprop.0+0x6a/0xb90 [ 69.076398] remove_vma+0x139/0x170 [ 69.076857] do_vmi_align_munmap+0xd4a/0x11f0 [ 69.077407] do_vmi_munmap+0x1f1/0x2b0 [ 69.077901] __vm_munmap+0x138/0x3a0 [ 69.078416] __x64_sys_munmap+0x59/0x80 [ 69.078912] do_syscall_64+0x3f/0x90 [ 69.079409] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 69.080056] [ 69.080271] The buggy address belongs to the object at ffff888015f43910 [ 69.080271] which belongs to the cache vm_area_struct of size 168 [ 69.081754] The buggy address is located 88 bytes inside of [ 69.081754] freed 168-byte region [ffff888015f43910, ffff888015f439b8) [ 69.083175] [ 69.083395] The buggy address belongs to the physical page: [ 69.084047] page:00000000a6012b98 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x15f43 [ 69.085140] memcg:ffff88800fcf8e01 [ 69.085564] flags: 0x100000000000200(slab|node=0|zone=1) [ 69.086211] page_type: 0xffffffff() [ 69.086681] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 69.087586] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800fcf8e01 [ 69.088490] page dumped because: kasan: bad access detected [ 69.089147] [ 69.089386] Memory state around the buggy address: [ 69.089963] ffff888015f43800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 69.090815] ffff888015f43880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 69.091656] >ffff888015f43900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.092520] ^ [ 69.093332] ffff888015f43980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 69.094213] ffff888015f43a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 69.095054] ================================================================== [ 69.096073] Disabling lock debugging due to kernel taint [ 71.257261] BUG: Bad rss-counter state mm:0000000075057902 type:MM_FILEPAGES val:33 [ 71.258248] BUG: Bad rss-counter state mm:0000000075057902 type:MM_ANONPAGES val:22 [ 71.756544] BUG: Bad rss-counter state mm:000000003f68fa35 type:MM_FILEPAGES val:33 [ 71.757559] BUG: Bad rss-counter state mm:000000003f68fa35 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:45069' (ECDSA) to the list of known hosts. 2023/06/20 18:29:18 fuzzer started 2023/06/20 18:29:18 dialing manager at localhost:36067 2023/06/20 18:29:18 checking machine... 2023/06/20 18:29:18 checking revisions... [ 72.468640] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:29:18 testing simple program... [ 72.514175] cgroup: Unknown subsys name 'net' [ 72.578198] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:29:18 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8451250e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffffffff0a80fc7 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 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=00007ffd0e11cd18 CR3=0000000009a1c000 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=2037313a39323a3831203032206e754a XMM01=657463656e6e6f63736944203a5d3633 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3633325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732037313a39323a3831203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000038000 RBX=0000000000000002 RCX=ffffffff8118ddc2 RDX=dffffc0000000000 RSI=00000000000018dd RDI=ffff88806cf09a98 RBP=ffff88806cf09af0 RSP=ffff88806cf09a28 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5d59 R12=ffff88806cf09af8 R13=ffff88806cf09ae0 R14=ffff88806cf09ad9 R15=ffff88806cf09a98 RIP=ffffffff81130754 RFL=00000287 [--S--PC] 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=00007f3281773fe0 CR3=000000000d5c4000 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=0bd4b5227fd7f58ae8470630a878e08f XMM02=2c67c8bc2e329bc3000000000011b0c0 XMM03=fb795ef6d65770560000000000122290 XMM04=a3abc35ad1d4063200000000000ae988 XMM05=16bbfc4fa606b62500000000001328f0 XMM06=77b6075dd7bad8000000000000131ac8 XMM07=e042d86d42eb936e0000000000122510 XMM08=8d04f86f931cd421000000000011b120 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000