syzkaller login: [ 30.663877] BUG: Bad rss-counter state mm:000000003c95c12f type:MM_FILEPAGES val:33 [ 30.665042] BUG: Bad rss-counter state mm:000000003c95c12f type:MM_ANONPAGES val:22 [ 30.708518] ================================================================== [ 30.709667] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.710730] Read of size 8 at addr ffff88801b203df0 by task sshd/220 [ 30.711595] [ 30.711886] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.712900] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.713886] Call Trace: [ 30.714210] [ 30.714494] dump_stack_lvl+0x91/0xf0 [ 30.714985] print_report+0xcc/0x620 [ 30.715469] ? __virt_addr_valid+0x102/0x340 [ 30.716025] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.716647] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.717281] kasan_report+0xbe/0xf0 [ 30.717766] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.718392] vma_interval_tree_remove+0xc75/0xec0 [ 30.719002] vma_prepare+0xc54/0x11a0 [ 30.719488] __split_vma+0x5af/0x950 [ 30.719997] ? __pfx___split_vma+0x10/0x10 [ 30.720587] ? find_held_lock+0x2c/0x110 [ 30.721126] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.721718] ? lock_is_held_type+0x9f/0x120 [ 30.722283] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.722911] ? mtree_range_walk+0x632/0x900 [ 30.723495] ? mas_walk+0x5c7/0x7c0 [ 30.724003] do_vmi_munmap+0x1f1/0x2b0 [ 30.724516] mmap_region+0x1f9/0x2660 [ 30.725026] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.725541] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.726282] ? __pfx_lock_acquire+0x10/0x10 [ 30.726814] ? __pfx_mmap_region+0x10/0x10 [ 30.727349] ? security_mmap_addr+0x7d/0xa0 [ 30.727899] ? get_unmapped_area+0x1f5/0x3f0 [ 30.728461] do_mmap+0x854/0xf00 [ 30.728914] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.729421] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.729997] ksys_mmap_pgoff+0x3af/0x500 [ 30.730512] do_syscall_64+0x3f/0x90 [ 30.731000] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.731667] RIP: 0033:0x7fd935729d82 [ 30.732128] 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 [ 30.734285] RSP: 002b:00007ffd73577f18 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.735200] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fd935729d82 [ 30.736045] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fd934b63000 [ 30.736903] RBP: 00007fd934b63000 R08: 0000000000000009 R09: 0000000000001000 [ 30.737753] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0c29d2f70 [ 30.738597] R13: 00007ffd73577f30 R14: 00007ffd73577f60 R15: 00007ffd735782c0 [ 30.739458] [ 30.739754] [ 30.739971] Allocated by task 213: [ 30.740412] kasan_save_stack+0x22/0x50 [ 30.740949] kasan_set_track+0x25/0x30 [ 30.741462] __kasan_slab_alloc+0x59/0x70 [ 30.741998] kmem_cache_alloc+0x16b/0x370 [ 30.742532] vm_area_dup+0x20/0x160 [ 30.742996] __split_vma+0x170/0x950 [ 30.743461] split_vma+0xc6/0x110 [ 30.743902] mprotect_fixup+0x8d2/0xb30 [ 30.744425] do_mprotect_pkey+0x87e/0xd40 [ 30.744968] __x64_sys_mprotect+0x78/0xc0 [ 30.745490] do_syscall_64+0x3f/0x90 [ 30.745972] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.746622] [ 30.746837] Freed by task 213: [ 30.747228] kasan_save_stack+0x22/0x50 [ 30.747743] kasan_set_track+0x25/0x30 [ 30.748244] kasan_save_free_info+0x2b/0x50 [ 30.748793] __kasan_slab_free+0x10a/0x190 [ 30.749328] kmem_cache_free+0x10d/0x4d0 [ 30.749839] rcu_core+0x8c8/0x2860 [ 30.750283] __do_softirq+0x1b7/0x7d4 [ 30.750772] [ 30.750993] Last potentially related work creation: [ 30.751672] kasan_save_stack+0x22/0x50 [ 30.752186] __kasan_record_aux_stack+0x8e/0xa0 [ 30.752779] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.753432] remove_vma+0x139/0x170 [ 30.753895] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.754458] do_vmi_munmap+0x1f1/0x2b0 [ 30.754953] __vm_munmap+0x138/0x3a0 [ 30.755422] __x64_sys_munmap+0x59/0x80 [ 30.755927] do_syscall_64+0x3f/0x90 [ 30.756425] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.757097] [ 30.757316] The buggy address belongs to the object at ffff88801b203d98 [ 30.757316] which belongs to the cache vm_area_struct of size 168 [ 30.758808] The buggy address is located 88 bytes inside of [ 30.758808] freed 168-byte region [ffff88801b203d98, ffff88801b203e40) [ 30.760227] [ 30.760472] The buggy address belongs to the physical page: [ 30.761135] page:00000000a0e69854 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x1b203 [ 30.762297] memcg:ffff888018ca1901 [ 30.762745] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.763403] page_type: 0xffffffff() [ 30.763867] raw: 0100000000000200 ffff8880087a0c80 dead000000000122 0000000000000000 [ 30.764806] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018ca1901 [ 30.765726] page dumped because: kasan: bad access detected [ 30.766388] [ 30.766601] Memory state around the buggy address: [ 30.767184] ffff88801b203c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 30.768078] ffff88801b203d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 30.768978] >ffff88801b203d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 30.769861] ^ [ 30.770669] ffff88801b203e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 30.771542] ffff88801b203e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.772482] ================================================================== [ 30.773468] Disabling lock debugging due to kernel taint [ 32.717867] BUG: Bad rss-counter state mm:000000000faccf47 type:MM_FILEPAGES val:33 [ 32.719049] BUG: Bad rss-counter state mm:000000000faccf47 type:MM_ANONPAGES val:22 [ 33.143127] BUG: Bad rss-counter state mm:00000000defe79f6 type:MM_FILEPAGES val:33 [ 33.144515] BUG: Bad rss-counter state mm:00000000defe79f6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:35189' (ECDSA) to the list of known hosts. 2023/06/20 20:53:46 fuzzer started 2023/06/20 20:53:47 dialing manager at localhost:36067 2023/06/20 20:53:47 checking machine... 2023/06/20 20:53:47 checking revisions... [ 33.881905] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:53:47 testing simple program... [ 33.922749] cgroup: Unknown subsys name 'net' [ 33.973360] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:53:46 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888014752000 RCX=1ffffffff09acbfd RDX=ffffffff87f9b1d0 RSI=0000000000000000 RDI=ffffffff84d65fe8 RBP=ffff888014752608 RSP=ffff888016697d88 R8 =0000000000000003 R9 =0000000000000000 R10=ffff888014752653 R11=00000000000b6a61 R12=0000000000000009 R13=0000000000000009 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff8386146c 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 00007f4134d91900 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=00007f41353490b0 CR3=000000000edc8000 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=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=00007fa8edab5990 CR3=000000000d71c000 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=a808b68faebd7a9099455915a7b45007 XMM02=000000000011a280eff9b2d0a8fce9cb XMM03=000000000011a3502c67c8bc2e329bc3 XMM04=f86594de0ebf352100000000000ae988 XMM05=19e9129bd510f2350000000000131740 XMM06=3a1d97caae7c023f00000000001305a8 XMM07=e042d86d42eb936e0000000000121ae8 XMM08=baecdb7061561af9000000000011a350 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000