syzkaller login: [ 39.280997] BUG: Bad rss-counter state mm:000000001d56182c type:MM_FILEPAGES val:33 [ 39.282452] BUG: Bad rss-counter state mm:000000001d56182c type:MM_ANONPAGES val:22 [ 39.449153] ================================================================== [ 39.450082] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 39.451030] Read of size 8 at addr ffff88800f7a6310 by task sshd/219 [ 39.451815] [ 39.452040] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 39.453053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 39.454046] Call Trace: [ 39.454376] [ 39.454688] dump_stack_lvl+0x91/0xf0 [ 39.455189] print_report+0xcc/0x620 [ 39.455687] ? __virt_addr_valid+0x102/0x340 [ 39.456255] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.456884] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.457519] kasan_report+0xbe/0xf0 [ 39.458003] ? vma_interval_tree_remove+0xc75/0xec0 [ 39.458648] vma_interval_tree_remove+0xc75/0xec0 [ 39.459248] vma_prepare+0xc54/0x11a0 [ 39.459747] __split_vma+0x5af/0x950 [ 39.460219] ? __pfx___split_vma+0x10/0x10 [ 39.460757] ? find_held_lock+0x2c/0x110 [ 39.461281] do_vmi_align_munmap+0x2ba/0x11f0 [ 39.461847] ? lock_is_held_type+0x9f/0x120 [ 39.462409] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 39.463025] ? mtree_range_walk+0x632/0x900 [ 39.463583] ? mas_walk+0x5c7/0x7c0 [ 39.464055] do_vmi_munmap+0x1f1/0x2b0 [ 39.464552] mmap_region+0x1f9/0x2660 [ 39.465035] ? vm_mmap_pgoff+0x15c/0x3a0 [ 39.465549] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 39.466280] ? __pfx_lock_acquire+0x10/0x10 [ 39.466825] ? __pfx_mmap_region+0x10/0x10 [ 39.467367] ? security_mmap_addr+0x7d/0xa0 [ 39.467908] ? get_unmapped_area+0x1f5/0x3f0 [ 39.468457] do_mmap+0x854/0xf00 [ 39.468899] vm_mmap_pgoff+0x1a6/0x3a0 [ 39.469408] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 39.469976] ksys_mmap_pgoff+0x3af/0x500 [ 39.470496] do_syscall_64+0x3f/0x90 [ 39.470977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.471622] RIP: 0033:0x7f098a990d82 [ 39.472077] 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 [ 39.474234] RSP: 002b:00007ffc26e89e68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 39.475150] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f098a990d82 [ 39.476008] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f0989dca000 [ 39.476853] RBP: 00007f0989dca000 R08: 0000000000000009 R09: 0000000000001000 [ 39.477696] R10: 0000000000000812 R11: 0000000000000206 R12: 000055937d801ec0 [ 39.478567] R13: 00007ffc26e89e80 R14: 00007ffc26e89eb0 R15: 00007ffc26e8a210 [ 39.479434] [ 39.479724] [ 39.479943] Allocated by task 212: [ 39.480371] kasan_save_stack+0x22/0x50 [ 39.480876] kasan_set_track+0x25/0x30 [ 39.481369] __kasan_slab_alloc+0x59/0x70 [ 39.481889] kmem_cache_alloc+0x16b/0x370 [ 39.482412] vm_area_dup+0x20/0x160 [ 39.482868] __split_vma+0x170/0x950 [ 39.483337] split_vma+0xc6/0x110 [ 39.483783] mprotect_fixup+0x8d2/0xb30 [ 39.484281] do_mprotect_pkey+0x87e/0xd40 [ 39.484801] __x64_sys_mprotect+0x78/0xc0 [ 39.485331] do_syscall_64+0x3f/0x90 [ 39.485829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.486494] [ 39.486718] Freed by task 203: [ 39.487136] kasan_save_stack+0x22/0x50 [ 39.487649] kasan_set_track+0x25/0x30 [ 39.488163] kasan_save_free_info+0x2b/0x50 [ 39.488701] __kasan_slab_free+0x10a/0x190 [ 39.489230] kmem_cache_free+0x10d/0x4d0 [ 39.489750] rcu_core+0x8c8/0x2860 [ 39.490205] __do_softirq+0x1b7/0x7d4 [ 39.490689] [ 39.490904] Last potentially related work creation: [ 39.491492] kasan_save_stack+0x22/0x50 [ 39.491993] __kasan_record_aux_stack+0x8e/0xa0 [ 39.492573] __call_rcu_common.constprop.0+0x6a/0xb90 [ 39.493217] remove_vma+0x139/0x170 [ 39.493678] do_vmi_align_munmap+0xd4a/0x11f0 [ 39.494257] do_vmi_munmap+0x1f1/0x2b0 [ 39.494740] __vm_munmap+0x138/0x3a0 [ 39.495212] __x64_sys_munmap+0x59/0x80 [ 39.495710] do_syscall_64+0x3f/0x90 [ 39.496184] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 39.496825] [ 39.497043] The buggy address belongs to the object at ffff88800f7a62b8 [ 39.497043] which belongs to the cache vm_area_struct of size 168 [ 39.498529] The buggy address is located 88 bytes inside of [ 39.498529] freed 168-byte region [ffff88800f7a62b8, ffff88800f7a6360) [ 39.499940] [ 39.500155] The buggy address belongs to the physical page: [ 39.500818] page:0000000025cb5585 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf7a6 [ 39.501902] memcg:ffff88800e0a3801 [ 39.502351] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 39.503047] page_type: 0xffffffff() [ 39.503494] raw: 0100000000000200 ffff88800879fc80 ffffea000037d100 dead000000000005 [ 39.504413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e0a3801 [ 39.505318] page dumped because: kasan: bad access detected [ 39.505973] [ 39.506193] Memory state around the buggy address: [ 39.506780] ffff88800f7a6200: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc [ 39.507634] ffff88800f7a6280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 39.508503] >ffff88800f7a6300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 39.509351] ^ [ 39.509822] ffff88800f7a6380: fc fc fc fc 00 00 00 00 00 00 00 00 00 00 00 00 [ 39.510694] ffff88800f7a6400: 00 00 00 00 00 00 00 00 00 fc fc fc fc fc fc fc [ 39.511546] ================================================================== [ 39.512845] Disabling lock debugging due to kernel taint [ 42.375206] BUG: Bad rss-counter state mm:00000000620895f2 type:MM_FILEPAGES val:33 [ 42.376214] BUG: Bad rss-counter state mm:00000000620895f2 type:MM_ANONPAGES val:22 [ 42.855999] BUG: Bad rss-counter state mm:00000000b4cac5f2 type:MM_FILEPAGES val:33 [ 42.857017] BUG: Bad rss-counter state mm:00000000b4cac5f2 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15205' (ECDSA) to the list of known hosts. 2023/06/20 04:55:45 fuzzer started 2023/06/20 04:55:46 dialing manager at localhost:44161 2023/06/20 04:55:46 checking machine... 2023/06/20 04:55:46 checking revisions... [ 43.592336] kmemleak: Automatic memory scanning thread ended 2023/06/20 04:55:46 testing simple program... [ 43.645389] cgroup: Unknown subsys name 'net' [ 43.683810] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:55:45 Registers: info registers vcpu 0 RAX=ffff88806ce0a000 RBX=ffff88806ce09da0 RCX=ffffffff86137501 RDX=ffff88806ce09da8 RSI=0000000000000000 RDI=ffff88806ce09a60 RBP=ffff88806ce02000 RSP=ffff88806ce099e0 R8 =ffffffff8613751e R9 =ffff88806ce09a90 R10=0000000000038001 R11=0000000000020d8a R12=ffff88806ce09ab0 R13=ffff88806ce09a98 R14=ffff88806ce09da0 R15=ffff88806ce09a50 RIP=ffffffff81131296 RFL=00000287 [--S--PC] 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fe195f01900 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=00007fe1953663b0 CR3=000000000ca80000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=b1ac19a6ee76e52600000000000ae988 XMM05=9342401b0685c2150000000000135128 XMM06=0e3a9df8b4e7216c0000000000133800 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 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=00007ffcc7f08808 CR3=000000001a004000 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=2035343a35353a3430203032206e754a XMM01=657463656e6e6f63736944203a5d3832 XMM02=302e303120746f6f722072657375206d XMM03=203a5d3832325b646873732072656c6c XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035343a35353a3430203032 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000