syzkaller login: [ 32.335281] BUG: Bad rss-counter state mm:00000000ccaab0ae type:MM_FILEPAGES val:33 [ 32.336605] BUG: Bad rss-counter state mm:00000000ccaab0ae type:MM_ANONPAGES val:22 [ 32.505674] ================================================================== [ 32.506720] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 32.507863] Read of size 8 at addr ffff888009898058 by task sshd/220 [ 32.508706] [ 32.508948] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 32.509901] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 32.511004] Call Trace: [ 32.511354] [ 32.511668] dump_stack_lvl+0x91/0xf0 [ 32.512214] print_report+0xcc/0x620 [ 32.512744] ? __virt_addr_valid+0x102/0x340 [ 32.513358] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.514043] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.514735] kasan_report+0xbe/0xf0 [ 32.515263] ? vma_interval_tree_remove+0xc75/0xec0 [ 32.515949] vma_interval_tree_remove+0xc75/0xec0 [ 32.516620] vma_prepare+0xc54/0x11a0 [ 32.517156] __split_vma+0x5af/0x950 [ 32.517682] ? __pfx___split_vma+0x10/0x10 [ 32.518272] ? find_held_lock+0x2c/0x110 [ 32.518874] do_vmi_align_munmap+0x2ba/0x11f0 [ 32.519505] ? lock_is_held_type+0x9f/0x120 [ 32.520098] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 32.520772] ? mtree_range_walk+0x632/0x900 [ 32.521383] ? mas_walk+0x5c7/0x7c0 [ 32.521910] do_vmi_munmap+0x1f1/0x2b0 [ 32.522467] mmap_region+0x1f9/0x2660 [ 32.523009] ? vm_mmap_pgoff+0x15c/0x3a0 [ 32.523576] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 32.524363] ? __pfx_lock_acquire+0x10/0x10 [ 32.524956] ? __pfx_mmap_region+0x10/0x10 [ 32.525540] ? security_mmap_addr+0x7d/0xa0 [ 32.526128] ? get_unmapped_area+0x1f5/0x3f0 [ 32.526750] do_mmap+0x854/0xf00 [ 32.527237] vm_mmap_pgoff+0x1a6/0x3a0 [ 32.527792] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 32.528413] ksys_mmap_pgoff+0x3af/0x500 [ 32.528974] do_syscall_64+0x3f/0x90 [ 32.529514] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.530231] RIP: 0033:0x7fe504e44d82 [ 32.530756] 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 [ 32.533123] RSP: 002b:00007ffc9e8d2b68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 32.534122] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe504e44d82 [ 32.535066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe50427e000 [ 32.536000] RBP: 00007fe50427e000 R08: 0000000000000009 R09: 0000000000001000 [ 32.536935] R10: 0000000000000812 R11: 0000000000000206 R12: 00005591fb2ecec0 [ 32.537874] R13: 00007ffc9e8d2b80 R14: 00007ffc9e8d2bb0 R15: 00007ffc9e8d2f10 [ 32.538830] [ 32.539146] [ 32.539372] Allocated by task 213: [ 32.539830] kasan_save_stack+0x22/0x50 [ 32.540370] kasan_set_track+0x25/0x30 [ 32.540903] __kasan_slab_alloc+0x59/0x70 [ 32.541459] kmem_cache_alloc+0x16b/0x370 [ 32.542015] vm_area_dup+0x20/0x160 [ 32.542508] __split_vma+0x170/0x950 [ 32.543000] split_vma+0xc6/0x110 [ 32.543464] mprotect_fixup+0x8d2/0xb30 [ 32.544003] do_mprotect_pkey+0x87e/0xd40 [ 32.544562] __x64_sys_mprotect+0x78/0xc0 [ 32.545127] do_syscall_64+0x3f/0x90 [ 32.545636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.546321] [ 32.546569] Freed by task 213: [ 32.546991] kasan_save_stack+0x22/0x50 [ 32.547534] kasan_set_track+0x25/0x30 [ 32.548060] kasan_save_free_info+0x2b/0x50 [ 32.548630] __kasan_slab_free+0x10a/0x190 [ 32.549197] kmem_cache_free+0x10d/0x4d0 [ 32.549739] rcu_core+0x8c8/0x2860 [ 32.550214] __do_softirq+0x1b7/0x7d4 [ 32.550732] [ 32.550959] Last potentially related work creation: [ 32.551582] kasan_save_stack+0x22/0x50 [ 32.552118] __kasan_record_aux_stack+0x8e/0xa0 [ 32.552732] __call_rcu_common.constprop.0+0x6a/0xb90 [ 32.553418] remove_vma+0x139/0x170 [ 32.553897] do_vmi_align_munmap+0xd4a/0x11f0 [ 32.554497] do_vmi_munmap+0x1f1/0x2b0 [ 32.555017] __vm_munmap+0x138/0x3a0 [ 32.555519] __x64_sys_munmap+0x59/0x80 [ 32.556046] do_syscall_64+0x3f/0x90 [ 32.556547] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 32.557228] [ 32.557460] The buggy address belongs to the object at ffff888009898000 [ 32.557460] which belongs to the cache vm_area_struct of size 168 [ 32.559044] The buggy address is located 88 bytes inside of [ 32.559044] freed 168-byte region [ffff888009898000, ffff8880098980a8) [ 32.560539] [ 32.560773] The buggy address belongs to the physical page: [ 32.561473] page:00000000b07a6b09 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x9898 [ 32.562635] memcg:ffff88800ec97501 [ 32.563097] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 32.563848] page_type: 0xffffffff() [ 32.564331] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 32.565309] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ec97501 [ 32.566270] page dumped because: kasan: bad access detected [ 32.566997] [ 32.567232] Memory state around the buggy address: [ 32.567866] ffff888009897f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 32.568788] ffff888009897f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 32.569699] >ffff888009898000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.570627] ^ [ 32.571411] ffff888009898080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 32.572346] ffff888009898100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 32.573271] ================================================================== [ 32.574434] Disabling lock debugging due to kernel taint [ 35.275652] BUG: Bad rss-counter state mm:000000001b50e882 type:MM_FILEPAGES val:33 [ 35.276811] BUG: Bad rss-counter state mm:000000001b50e882 type:MM_ANONPAGES val:22 [ 35.658584] BUG: Bad rss-counter state mm:00000000a59afb6d type:MM_FILEPAGES val:33 [ 35.659594] BUG: Bad rss-counter state mm:00000000a59afb6d type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56433' (ECDSA) to the list of known hosts. 2023/06/19 20:26:35 fuzzer started 2023/06/19 20:26:35 dialing manager at localhost:44161 2023/06/19 20:26:35 checking machine... 2023/06/19 20:26:35 checking revisions... [ 36.396264] kmemleak: Automatic memory scanning thread ended 2023/06/19 20:26:35 testing simple program... [ 36.444509] cgroup: Unknown subsys name 'net' [ 36.503489] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:26:34 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000005 RCX=0000000080000000 RDX=1ffff11000d655ce RSI=ffffffff81f3065f RDI=ffff888006b2ae70 RBP=ffff888006b2ae40 RSP=ffff88800dd8f9f8 R8 =0000000000000005 R9 =000000000000017f R10=0000000000000170 R11=0000000000000000 R12=0000000000000001 R13=0000000000000030 R14=dffffc0000000000 R15=0000000000001032 RIP=ffffffff814c07f1 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 00007f378114e900 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=00007f37817060b0 CR3=000000000edb6000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=ffff888008c58400 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007f73859dab20 CR3=000000000d980000 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=ce62b4a1355be4b60d4050abecd707ea XMM02=ec2efd57dc4c00df000000000011f1f8 XMM03=3dd4887dfb17a8c6000000000011f2c8 XMM04=ac46ed77645734f900000000000ae988 XMM05=19e9129bd510f2350000000000133578 XMM06=958d0222aee27c5800000000001323e0 XMM07=e042d86d42eb936e0000000000123c88 XMM08=3dd4887dfb17a8c6000000000011f2c8 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000