syzkaller login: [ 30.885376] BUG: Bad rss-counter state mm:000000008f8aa5f8 type:MM_FILEPAGES val:33 [ 30.886801] BUG: Bad rss-counter state mm:000000008f8aa5f8 type:MM_ANONPAGES val:22 [ 31.041234] ================================================================== [ 31.042218] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.043149] Read of size 8 at addr ffff88800dd42798 by task sshd/219 [ 31.043905] [ 31.044123] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.045131] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.046098] Call Trace: [ 31.046435] [ 31.046732] dump_stack_lvl+0x91/0xf0 [ 31.047219] print_report+0xcc/0x620 [ 31.047708] ? __virt_addr_valid+0x102/0x340 [ 31.048255] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.048862] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.049476] kasan_report+0xbe/0xf0 [ 31.049955] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.050610] vma_interval_tree_remove+0xc75/0xec0 [ 31.051252] vma_prepare+0xc54/0x11a0 [ 31.051777] __split_vma+0x5af/0x950 [ 31.052294] ? __pfx___split_vma+0x10/0x10 [ 31.052872] ? find_held_lock+0x2c/0x110 [ 31.053439] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.054057] ? lock_is_held_type+0x9f/0x120 [ 31.054684] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.055353] ? mtree_range_walk+0x632/0x900 [ 31.055940] ? mas_walk+0x5c7/0x7c0 [ 31.056461] do_vmi_munmap+0x1f1/0x2b0 [ 31.057005] mmap_region+0x1f9/0x2660 [ 31.057545] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.058096] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.058889] ? __pfx_lock_acquire+0x10/0x10 [ 31.059472] ? __pfx_mmap_region+0x10/0x10 [ 31.060062] ? security_mmap_addr+0x7d/0xa0 [ 31.060637] ? get_unmapped_area+0x1f5/0x3f0 [ 31.061246] do_mmap+0x854/0xf00 [ 31.061717] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.062266] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.062892] ksys_mmap_pgoff+0x3af/0x500 [ 31.063437] do_syscall_64+0x3f/0x90 [ 31.063955] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.064654] RIP: 0033:0x7f49eb03fd82 [ 31.065148] 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 [ 31.067513] RSP: 002b:00007ffc9bd817e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.068496] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f49eb03fd82 [ 31.069423] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f49ea479000 [ 31.070376] RBP: 00007f49ea479000 R08: 0000000000000009 R09: 0000000000001000 [ 31.071306] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d6469e5ec0 [ 31.072233] R13: 00007ffc9bd81800 R14: 00007ffc9bd81830 R15: 00007ffc9bd81b90 [ 31.073177] [ 31.073498] [ 31.073737] Allocated by task 212: [ 31.074234] kasan_save_stack+0x22/0x50 [ 31.074790] kasan_set_track+0x25/0x30 [ 31.075334] __kasan_slab_alloc+0x59/0x70 [ 31.075917] kmem_cache_alloc+0x16b/0x370 [ 31.076485] vm_area_dup+0x20/0x160 [ 31.076989] __split_vma+0x170/0x950 [ 31.077500] split_vma+0xc6/0x110 [ 31.077993] mprotect_fixup+0x8d2/0xb30 [ 31.078564] do_mprotect_pkey+0x87e/0xd40 [ 31.079142] __x64_sys_mprotect+0x78/0xc0 [ 31.079715] do_syscall_64+0x3f/0x90 [ 31.080239] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.080941] [ 31.081177] Freed by task 13: [ 31.081596] kasan_save_stack+0x22/0x50 [ 31.082141] kasan_set_track+0x25/0x30 [ 31.082708] kasan_save_free_info+0x2b/0x50 [ 31.083294] __kasan_slab_free+0x10a/0x190 [ 31.083871] kmem_cache_free+0x10d/0x4d0 [ 31.084435] rcu_core+0x8c8/0x2860 [ 31.084924] __do_softirq+0x1b7/0x7d4 [ 31.085438] [ 31.085676] Last potentially related work creation: [ 31.086341] kasan_save_stack+0x22/0x50 [ 31.086889] __kasan_record_aux_stack+0x8e/0xa0 [ 31.087522] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.088230] remove_vma+0x139/0x170 [ 31.088734] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.089352] do_vmi_munmap+0x1f1/0x2b0 [ 31.089879] __vm_munmap+0x138/0x3a0 [ 31.090404] __x64_sys_munmap+0x59/0x80 [ 31.090935] do_syscall_64+0x3f/0x90 [ 31.091455] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.092162] [ 31.092403] The buggy address belongs to the object at ffff88800dd42740 [ 31.092403] which belongs to the cache vm_area_struct of size 168 [ 31.094032] The buggy address is located 88 bytes inside of [ 31.094032] freed 168-byte region [ffff88800dd42740, ffff88800dd427e8) [ 31.095584] [ 31.095818] The buggy address belongs to the physical page: [ 31.096558] page:000000000241fc19 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdd42 [ 31.097749] memcg:ffff88800e0afc01 [ 31.098234] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.098936] page_type: 0xffffffff() [ 31.099431] raw: 0100000000000200 ffff88800879fc80 ffffea0000376800 dead000000000004 [ 31.100442] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0afc01 [ 31.101446] page dumped because: kasan: bad access detected [ 31.102184] [ 31.102433] Memory state around the buggy address: [ 31.103067] ffff88800dd42680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.104016] ffff88800dd42700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 31.104963] >ffff88800dd42780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 31.105905] ^ [ 31.106473] ffff88800dd42800: fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 [ 31.107416] ffff88800dd42880: 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc [ 31.108346] ================================================================== [ 31.109432] Disabling lock debugging due to kernel taint [ 33.013037] BUG: Bad rss-counter state mm:00000000dd364037 type:MM_FILEPAGES val:33 [ 33.013957] BUG: Bad rss-counter state mm:00000000dd364037 type:MM_ANONPAGES val:22 [ 33.586430] BUG: Bad rss-counter state mm:0000000030ad34c4 type:MM_FILEPAGES val:33 [ 33.587608] BUG: Bad rss-counter state mm:0000000030ad34c4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:20125' (ECDSA) to the list of known hosts. 2023/06/19 22:54:19 fuzzer started 2023/06/19 22:54:19 dialing manager at localhost:44161 2023/06/19 22:54:19 checking machine... 2023/06/19 22:54:19 checking revisions... [ 34.240970] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:54:19 testing simple program... [ 34.278681] cgroup: Unknown subsys name 'net' [ 34.325971] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:54:18 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=ffff888008e1c0d8 RCX=ffffffff81f366cb RDX=ffff888014329b40 RSI=0000000000000000 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88800ef17958 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000001 R11=00000000000b6996 R12=000000001371c348 R13=0000000000000001 R14=ffff88800ef17c20 R15=0000000000000000 RIP=ffffffff814c01e1 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 00007f13d21a1900 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=00007f13d2758618 CR3=000000000c602000 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=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a 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=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=00007ffeb387ed88 CR3=000000000b366000 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=2038313a34353a3232203931206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732038313a34353a3232203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000