syzkaller login: [ 30.303953] BUG: Bad rss-counter state mm:00000000050e436f type:MM_FILEPAGES val:33 [ 30.304954] BUG: Bad rss-counter state mm:00000000050e436f type:MM_ANONPAGES val:22 [ 30.463201] ================================================================== [ 30.464140] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.465074] Read of size 8 at addr ffff888019db2ed8 by task sshd/221 [ 30.466043] [ 30.466280] CPU: 1 PID: 221 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.467151] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.468122] Call Trace: [ 30.468442] [ 30.468728] dump_stack_lvl+0x91/0xf0 [ 30.469223] print_report+0xcc/0x620 [ 30.469710] ? __virt_addr_valid+0x102/0x340 [ 30.470279] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.470903] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.471526] kasan_report+0xbe/0xf0 [ 30.472006] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.472629] vma_interval_tree_remove+0xc75/0xec0 [ 30.473230] vma_prepare+0xc54/0x11a0 [ 30.473717] __split_vma+0x5af/0x950 [ 30.474192] ? __pfx___split_vma+0x10/0x10 [ 30.474771] ? find_held_lock+0x2c/0x110 [ 30.475305] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.475886] ? lock_is_held_type+0x9f/0x120 [ 30.476436] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.477052] ? mtree_range_walk+0x632/0x900 [ 30.477612] ? mas_walk+0x5c7/0x7c0 [ 30.478093] do_vmi_munmap+0x1f1/0x2b0 [ 30.478603] mmap_region+0x1f9/0x2660 [ 30.479087] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.479608] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.480334] ? __pfx_lock_acquire+0x10/0x10 [ 30.480876] ? __pfx_mmap_region+0x10/0x10 [ 30.481406] ? security_mmap_addr+0x7d/0xa0 [ 30.481936] ? get_unmapped_area+0x1f5/0x3f0 [ 30.482506] do_mmap+0x854/0xf00 [ 30.482947] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.483449] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.484015] ksys_mmap_pgoff+0x3af/0x500 [ 30.484531] do_syscall_64+0x3f/0x90 [ 30.485012] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.485668] RIP: 0033:0x7fe2a7462d82 [ 30.486125] 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 [ 30.488260] RSP: 002b:00007fffadcdf798 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.489160] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe2a7462d82 [ 30.490012] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe2a689c000 [ 30.490869] RBP: 00007fe2a689c000 R08: 0000000000000009 R09: 0000000000001000 [ 30.491706] R10: 0000000000000812 R11: 0000000000000206 R12: 000055a6cdeb5d90 [ 30.492542] R13: 00007fffadcdf7b0 R14: 00007fffadcdf7e0 R15: 00007fffadcdfb40 [ 30.493402] [ 30.493691] [ 30.493909] Allocated by task 214: [ 30.494355] kasan_save_stack+0x22/0x50 [ 30.494855] kasan_set_track+0x25/0x30 [ 30.495343] __kasan_slab_alloc+0x59/0x70 [ 30.495859] kmem_cache_alloc+0x16b/0x370 [ 30.496378] vm_area_dup+0x20/0x160 [ 30.496838] __split_vma+0x170/0x950 [ 30.497303] split_vma+0xc6/0x110 [ 30.497749] mprotect_fixup+0x8d2/0xb30 [ 30.498249] do_mprotect_pkey+0x87e/0xd40 [ 30.498798] __x64_sys_mprotect+0x78/0xc0 [ 30.499320] do_syscall_64+0x3f/0x90 [ 30.499796] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.500442] [ 30.500659] Freed by task 214: [ 30.501059] kasan_save_stack+0x22/0x50 [ 30.501565] kasan_set_track+0x25/0x30 [ 30.502057] kasan_save_free_info+0x2b/0x50 [ 30.502614] __kasan_slab_free+0x10a/0x190 [ 30.503147] kmem_cache_free+0x10d/0x4d0 [ 30.503651] rcu_core+0x8c8/0x2860 [ 30.504095] __do_softirq+0x1b7/0x7d4 [ 30.504572] [ 30.504787] Last potentially related work creation: [ 30.505380] kasan_save_stack+0x22/0x50 [ 30.505882] __kasan_record_aux_stack+0x8e/0xa0 [ 30.506454] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.507157] remove_vma+0x139/0x170 [ 30.507613] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.508166] do_vmi_munmap+0x1f1/0x2b0 [ 30.508649] __vm_munmap+0x138/0x3a0 [ 30.509120] __x64_sys_munmap+0x59/0x80 [ 30.509618] do_syscall_64+0x3f/0x90 [ 30.510092] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.510746] [ 30.510962] The buggy address belongs to the object at ffff888019db2e80 [ 30.510962] which belongs to the cache vm_area_struct of size 168 [ 30.512419] The buggy address is located 88 bytes inside of [ 30.512419] freed 168-byte region [ffff888019db2e80, ffff888019db2f28) [ 30.513812] [ 30.514027] The buggy address belongs to the physical page: [ 30.514703] page:00000000df5a0ae2 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19db2 [ 30.515790] memcg:ffff8880140d2601 [ 30.516217] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.516860] page_type: 0xffffffff() [ 30.517319] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.518242] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880140d2601 [ 30.519185] page dumped because: kasan: bad access detected [ 30.519876] [ 30.520102] Memory state around the buggy address: [ 30.520695] ffff888019db2d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.521565] ffff888019db2e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 30.522449] >ffff888019db2e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.523328] ^ [ 30.524080] ffff888019db2f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 30.524955] ffff888019db2f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 30.525822] ================================================================== [ 30.526867] Disabling lock debugging due to kernel taint [ 32.692439] BUG: Bad rss-counter state mm:0000000073ff7993 type:MM_FILEPAGES val:33 [ 32.693431] BUG: Bad rss-counter state mm:0000000073ff7993 type:MM_ANONPAGES val:22 [ 33.177387] BUG: Bad rss-counter state mm:00000000e9793e94 type:MM_FILEPAGES val:33 [ 33.178602] BUG: Bad rss-counter state mm:00000000e9793e94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:10314' (ECDSA) to the list of known hosts. 2023/06/21 00:44:36 fuzzer started 2023/06/21 00:44:36 dialing manager at localhost:36067 2023/06/21 00:44:36 checking machine... 2023/06/21 00:44:36 checking revisions... [ 33.926468] kmemleak: Automatic memory scanning thread ended 2023/06/21 00:44:36 testing simple program... [ 33.971281] cgroup: Unknown subsys name 'net' [ 34.023630] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:44:36 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff11001fb6f2a RSI=ffff88800fdb7f48 RDI=ffffffff846000aa RBP=ffff88800fdb7950 RSP=ffff88800fdb78e8 R8 =0000000000000001 R9 =ffff88800fdb7938 R10=0000000000038001 R11=00000000000b5080 R12=ffff88800fdb79c0 R13=0000000000000000 R14=ffff888014239b40 R15=0000000000092cc0 RIP=ffffffff811303b9 RFL=00000246 [---Z-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 00007f48d1069900 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=00007f48d16210b0 CR3=000000000e328000 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=25252525252525252525252525252525 XMM01=000000000000000000000000000000ff XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=662079726f6d656d20666f2074756f00 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=00007f53fd2facc0 CR3=000000000d684000 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=fc67444587a0d4b480438af9d2e6b6a8 XMM02=2c67c8bc2e329bc3000000000011a570 XMM03=fb795ef6d65770560000000000121a10 XMM04=78d9a18042da6e1500000000000ae988 XMM05=e4cb8bb95a7664b60000000000131888 XMM06=432c5908429679e500000000001306f0 XMM07=e042d86d42eb936e0000000000121c90 XMM08=e0cc9d14c8501e6d000000000011a5d0 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000