syzkaller login: [ 29.041615] BUG: Bad rss-counter state mm:00000000e9884495 type:MM_FILEPAGES val:33 [ 29.042793] BUG: Bad rss-counter state mm:00000000e9884495 type:MM_ANONPAGES val:22 [ 29.083133] ================================================================== [ 29.084088] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 29.085029] Read of size 8 at addr ffff88800fd7e4e0 by task sshd/220 [ 29.085953] [ 29.086173] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 29.087048] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 29.088083] Call Trace: [ 29.088406] [ 29.088691] dump_stack_lvl+0x91/0xf0 [ 29.089193] print_report+0xcc/0x620 [ 29.089688] ? __virt_addr_valid+0x102/0x340 [ 29.090261] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.090883] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.091495] kasan_report+0xbe/0xf0 [ 29.091985] ? vma_interval_tree_remove+0xc75/0xec0 [ 29.092609] vma_interval_tree_remove+0xc75/0xec0 [ 29.093214] vma_prepare+0xc54/0x11a0 [ 29.093687] __split_vma+0x5af/0x950 [ 29.094167] ? __pfx___split_vma+0x10/0x10 [ 29.094695] ? find_held_lock+0x2c/0x110 [ 29.095226] do_vmi_align_munmap+0x2ba/0x11f0 [ 29.095811] ? lock_is_held_type+0x9f/0x120 [ 29.096348] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 29.096951] ? mtree_range_walk+0x632/0x900 [ 29.097513] ? mas_walk+0x5c7/0x7c0 [ 29.097991] do_vmi_munmap+0x1f1/0x2b0 [ 29.098483] mmap_region+0x1f9/0x2660 [ 29.098966] ? vm_mmap_pgoff+0x15c/0x3a0 [ 29.099473] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 29.100205] ? __pfx_lock_acquire+0x10/0x10 [ 29.100734] ? __pfx_mmap_region+0x10/0x10 [ 29.101262] ? security_mmap_addr+0x7d/0xa0 [ 29.101789] ? get_unmapped_area+0x1f5/0x3f0 [ 29.102343] do_mmap+0x854/0xf00 [ 29.102779] vm_mmap_pgoff+0x1a6/0x3a0 [ 29.103276] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 29.103863] ksys_mmap_pgoff+0x3af/0x500 [ 29.104377] do_syscall_64+0x3f/0x90 [ 29.104855] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.105501] RIP: 0033:0x7fe424ed4d82 [ 29.105957] 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 [ 29.108118] RSP: 002b:00007ffc2746e948 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 29.109020] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe424ed4d82 [ 29.109870] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe42430e000 [ 29.110724] RBP: 00007fe42430e000 R08: 0000000000000009 R09: 0000000000001000 [ 29.111577] R10: 0000000000000812 R11: 0000000000000206 R12: 000055818a75fb20 [ 29.112428] R13: 00007ffc2746e960 R14: 00007ffc2746e990 R15: 00007ffc2746ecf0 [ 29.113284] [ 29.113577] [ 29.113794] Allocated by task 213: [ 29.114222] kasan_save_stack+0x22/0x50 [ 29.114723] kasan_set_track+0x25/0x30 [ 29.115213] __kasan_slab_alloc+0x59/0x70 [ 29.115752] kmem_cache_alloc+0x16b/0x370 [ 29.116278] vm_area_dup+0x20/0x160 [ 29.116729] __split_vma+0x170/0x950 [ 29.117192] split_vma+0xc6/0x110 [ 29.117635] mprotect_fixup+0x8d2/0xb30 [ 29.118136] do_mprotect_pkey+0x87e/0xd40 [ 29.118653] __x64_sys_mprotect+0x78/0xc0 [ 29.119175] do_syscall_64+0x3f/0x90 [ 29.119648] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.120312] [ 29.120531] Freed by task 213: [ 29.120923] kasan_save_stack+0x22/0x50 [ 29.121433] kasan_set_track+0x25/0x30 [ 29.121932] kasan_save_free_info+0x2b/0x50 [ 29.122480] __kasan_slab_free+0x10a/0x190 [ 29.123015] kmem_cache_free+0x10d/0x4d0 [ 29.123534] rcu_core+0x8c8/0x2860 [ 29.124005] __do_softirq+0x1b7/0x7d4 [ 29.124486] [ 29.124700] Last potentially related work creation: [ 29.125304] kasan_save_stack+0x22/0x50 [ 29.125812] __kasan_record_aux_stack+0x8e/0xa0 [ 29.126389] __call_rcu_common.constprop.0+0x6a/0xb90 [ 29.127029] remove_vma+0x139/0x170 [ 29.127482] do_vmi_align_munmap+0xd4a/0x11f0 [ 29.128059] do_vmi_munmap+0x1f1/0x2b0 [ 29.128543] __vm_munmap+0x138/0x3a0 [ 29.129007] __x64_sys_munmap+0x59/0x80 [ 29.129506] do_syscall_64+0x3f/0x90 [ 29.129986] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 29.130632] [ 29.130849] The buggy address belongs to the object at ffff88800fd7e488 [ 29.130849] which belongs to the cache vm_area_struct of size 168 [ 29.132352] The buggy address is located 88 bytes inside of [ 29.132352] freed 168-byte region [ffff88800fd7e488, ffff88800fd7e530) [ 29.133769] [ 29.133991] The buggy address belongs to the physical page: [ 29.134663] page:000000001c6ad2bc refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfd7e [ 29.135763] memcg:ffff88800d8bd901 [ 29.136203] flags: 0x100000000000200(slab|node=0|zone=1) [ 29.136845] page_type: 0xffffffff() [ 29.137295] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 29.138211] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d8bd901 [ 29.139123] page dumped because: kasan: bad access detected [ 29.139796] [ 29.140014] Memory state around the buggy address: [ 29.140596] ffff88800fd7e380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 29.141454] ffff88800fd7e400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 29.142312] >ffff88800fd7e480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.143168] ^ [ 29.143923] ffff88800fd7e500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 29.144782] ffff88800fd7e580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 29.145637] ================================================================== [ 29.147012] Disabling lock debugging due to kernel taint [ 31.385868] BUG: Bad rss-counter state mm:00000000c31267bc type:MM_FILEPAGES val:33 [ 31.386980] BUG: Bad rss-counter state mm:00000000c31267bc type:MM_ANONPAGES val:22 [ 31.911314] BUG: Bad rss-counter state mm:00000000f3dddb05 type:MM_FILEPAGES val:33 [ 31.912542] BUG: Bad rss-counter state mm:00000000f3dddb05 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:41481' (ECDSA) to the list of known hosts. 2023/06/21 07:51:44 fuzzer started 2023/06/21 07:51:44 dialing manager at localhost:36067 2023/06/21 07:51:44 checking machine... 2023/06/21 07:51:44 checking revisions... [ 32.542764] kmemleak: Automatic memory scanning thread ended 2023/06/21 07:51:44 testing simple program... [ 32.586513] cgroup: Unknown subsys name 'net' [ 32.624473] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 07:51:44 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000080000000 RDX=0000000000000000 RSI=ffffffff814c8584 RDI=ffff8880162355b4 RBP=0000000000000000 RSP=ffff88800ec3f298 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6a61 R12=0000000000000000 R13=0000000000000000 R14=ffffffff85652d08 R15=ffff88800ef86260 RIP=ffffffff814c0871 RFL=00000293 [--S-A-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 00007f0933f57900 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=00007ffed2751ff8 CR3=000000001368c000 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=74696d7265705f6d61703d73726f746e XMM02=000000000000000000000000000000ff XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=61662029286e65706f5f746964756100 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=0000000000000001 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=00007fb4061bab70 CR3=0000000013692000 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=9a6e109e56248cabbf4c92148766be0b XMM02=000000000011b370eff9b2d0a8fce9cb XMM03=000000000011b4402c67c8bc2e329bc3 XMM04=4b284e9ad097db7e00000000000ae988 XMM05=0683aa2b7621cc520000000000132988 XMM06=4fda316b135da52b0000000000131db0 XMM07=e042d86d42eb936e0000000000122368 XMM08=826b302252cf9646000000000011b440 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000