syzkaller login: [ 34.680106] BUG: Bad rss-counter state mm:00000000a48f5636 type:MM_FILEPAGES val:33 [ 34.681304] BUG: Bad rss-counter state mm:00000000a48f5636 type:MM_ANONPAGES val:22 [ 34.722031] ================================================================== [ 34.722541] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 34.723067] Read of size 8 at addr ffff888018136ed8 by task sshd/220 [ 34.723680] [ 34.723803] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 34.724274] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 34.724807] Call Trace: [ 34.724982] [ 34.725139] dump_stack_lvl+0x91/0xf0 [ 34.725406] print_report+0xcc/0x620 [ 34.725769] ? __virt_addr_valid+0x102/0x340 [ 34.726180] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.726521] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.726858] kasan_report+0xbe/0xf0 [ 34.727118] ? vma_interval_tree_remove+0xc75/0xec0 [ 34.727453] vma_interval_tree_remove+0xc75/0xec0 [ 34.727805] vma_prepare+0xc54/0x11a0 [ 34.728077] __split_vma+0x5af/0x950 [ 34.728336] ? __pfx___split_vma+0x10/0x10 [ 34.728627] ? find_held_lock+0x2c/0x110 [ 34.728913] do_vmi_align_munmap+0x2ba/0x11f0 [ 34.729221] ? lock_is_held_type+0x9f/0x120 [ 34.729518] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 34.729852] ? mtree_range_walk+0x632/0x900 [ 34.730148] ? mas_walk+0x5c7/0x7c0 [ 34.730407] do_vmi_munmap+0x1f1/0x2b0 [ 34.730675] mmap_region+0x1f9/0x2660 [ 34.730946] ? vm_mmap_pgoff+0x15c/0x3a0 [ 34.731239] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 34.731643] ? __pfx_lock_acquire+0x10/0x10 [ 34.731945] ? __pfx_mmap_region+0x10/0x10 [ 34.732248] ? security_mmap_addr+0x7d/0xa0 [ 34.732546] ? get_unmapped_area+0x1f5/0x3f0 [ 34.732853] do_mmap+0x854/0xf00 [ 34.733104] vm_mmap_pgoff+0x1a6/0x3a0 [ 34.733377] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 34.733691] ksys_mmap_pgoff+0x3af/0x500 [ 34.733980] do_syscall_64+0x3f/0x90 [ 34.734249] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.734619] RIP: 0033:0x7f68f3359d82 [ 34.734879] 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 [ 34.736081] RSP: 002b:00007fff85a8ee88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 34.736587] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f68f3359d82 [ 34.737066] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f68f2793000 [ 34.737549] RBP: 00007f68f2793000 R08: 0000000000000009 R09: 0000000000001000 [ 34.738030] R10: 0000000000000812 R11: 0000000000000206 R12: 00005584354c4f70 [ 34.738511] R13: 00007fff85a8eea0 R14: 00007fff85a8eed0 R15: 00007fff85a8f230 [ 34.739010] [ 34.739171] [ 34.739289] Allocated by task 213: [ 34.739533] kasan_save_stack+0x22/0x50 [ 34.739834] kasan_set_track+0x25/0x30 [ 34.740113] __kasan_slab_alloc+0x59/0x70 [ 34.740408] kmem_cache_alloc+0x16b/0x370 [ 34.740694] vm_area_dup+0x20/0x160 [ 34.740947] __split_vma+0x170/0x950 [ 34.741206] split_vma+0xc6/0x110 [ 34.741456] mprotect_fixup+0x8d2/0xb30 [ 34.741740] do_mprotect_pkey+0x87e/0xd40 [ 34.742036] __x64_sys_mprotect+0x78/0xc0 [ 34.742338] do_syscall_64+0x3f/0x90 [ 34.742603] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.742960] [ 34.743080] Freed by task 213: [ 34.743299] kasan_save_stack+0x22/0x50 [ 34.743589] kasan_set_track+0x25/0x30 [ 34.743858] kasan_save_free_info+0x2b/0x50 [ 34.744155] __kasan_slab_free+0x10a/0x190 [ 34.744453] kmem_cache_free+0x10d/0x4d0 [ 34.744740] rcu_core+0x8c8/0x2860 [ 34.744992] __do_softirq+0x1b7/0x7d4 [ 34.745262] [ 34.745386] Last potentially related work creation: [ 34.745720] kasan_save_stack+0x22/0x50 [ 34.746012] __kasan_record_aux_stack+0x8e/0xa0 [ 34.746338] __call_rcu_common.constprop.0+0x6a/0xb90 [ 34.746703] remove_vma+0x139/0x170 [ 34.746958] do_vmi_align_munmap+0xd4a/0x11f0 [ 34.747275] do_vmi_munmap+0x1f1/0x2b0 [ 34.747549] __vm_munmap+0x138/0x3a0 [ 34.747819] __x64_sys_munmap+0x59/0x80 [ 34.748100] do_syscall_64+0x3f/0x90 [ 34.748360] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 34.748715] [ 34.748836] The buggy address belongs to the object at ffff888018136e80 [ 34.748836] which belongs to the cache vm_area_struct of size 168 [ 34.749669] The buggy address is located 88 bytes inside of [ 34.749669] freed 168-byte region [ffff888018136e80, ffff888018136f28) [ 34.750470] [ 34.750592] The buggy address belongs to the physical page: [ 34.750964] page:00000000d3b39368 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18136 [ 34.751587] memcg:ffff888019e3bc01 [ 34.751826] flags: 0x100000000000200(slab|node=0|zone=1) [ 34.752202] page_type: 0xffffffff() [ 34.752456] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 34.752974] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019e3bc01 [ 34.753473] page dumped because: kasan: bad access detected [ 34.753847] [ 34.753974] Memory state around the buggy address: [ 34.754303] ffff888018136d80: fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 34.754793] ffff888018136e00: 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc [ 34.755271] >ffff888018136e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 34.755762] ^ [ 34.756173] ffff888018136f00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 34.756659] ffff888018136f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 34.757137] ================================================================== [ 34.757664] Disabling lock debugging due to kernel taint [ 36.801844] BUG: Bad rss-counter state mm:000000004eda0bf9 type:MM_FILEPAGES val:33 [ 36.803025] BUG: Bad rss-counter state mm:000000004eda0bf9 type:MM_ANONPAGES val:22 [ 37.183883] BUG: Bad rss-counter state mm:000000001ffc3414 type:MM_FILEPAGES val:33 [ 37.185051] BUG: Bad rss-counter state mm:000000001ffc3414 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:49093' (ECDSA) to the list of known hosts. 2023/06/19 19:04:58 fuzzer started 2023/06/19 19:04:59 dialing manager at localhost:44161 2023/06/19 19:04:59 checking machine... 2023/06/19 19:04:59 checking revisions... [ 37.800679] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:04:59 testing simple program... [ 37.847090] cgroup: Unknown subsys name 'net' [ 37.908961] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:04:54 Registers: info registers vcpu 0 RAX=0000000000000002 RBX=ffffffff85e0b3a4 RCX=ffffffff818e33b6 RDX=0000000000000005 RSI=ffffffff8614d354 RDI=ffffffff85e0b384 RBP=ffffffff85e0b39c RSP=ffff888019e178c0 R8 =ffffffff8614d354 R9 =ffff888019e179b8 R10=0000000000038001 R11=00000000000247ec R12=ffffffff85e0b3b0 R13=ffffffff85e0b384 R14=ffffffff85e0b398 R15=dffffc0000000000 RIP=ffffffff8112fc73 RFL=00000213 [----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 00007f59bc9ac900 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=00007ffd0a482000 CR3=000000000e2f8000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff 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=0000000000000001 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=00007f821d2a7ff0 CR3=000000000ed2a000 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=d8d039df604c4ebfaa4a8da559951a6e XMM02=000000000011d328eff9b2d0a8fce9cb XMM03=000000000011d3f82c67c8bc2e329bc3 XMM04=8c6c97446a85ecf500000000000ae988 XMM05=e4cb8bb95a7664b600000000001343a0 XMM06=22fde3c3f5b3bedd0000000000133208 XMM07=e042d86d42eb936e0000000000124a80 XMM08=df45a747f5a15682000000000011d3f8 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000