syzkaller login: [ 38.185385] BUG: Bad rss-counter state mm:000000009866950c type:MM_FILEPAGES val:33 [ 38.186509] BUG: Bad rss-counter state mm:000000009866950c type:MM_ANONPAGES val:22 [ 38.355943] ================================================================== [ 38.356967] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 38.358062] Read of size 8 at addr ffff88800e3d3968 by task sshd/220 [ 38.358865] [ 38.359090] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 38.360026] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 38.361034] Call Trace: [ 38.361359] [ 38.361667] dump_stack_lvl+0x91/0xf0 [ 38.362160] print_report+0xcc/0x620 [ 38.362666] ? __virt_addr_valid+0x102/0x340 [ 38.363221] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.363874] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.364499] kasan_report+0xbe/0xf0 [ 38.365013] ? vma_interval_tree_remove+0xc75/0xec0 [ 38.365738] vma_interval_tree_remove+0xc75/0xec0 [ 38.366573] vma_prepare+0xc54/0x11a0 [ 38.367228] __split_vma+0x5af/0x950 [ 38.367898] ? __pfx___split_vma+0x10/0x10 [ 38.368633] ? find_held_lock+0x2c/0x110 [ 38.369351] do_vmi_align_munmap+0x2ba/0x11f0 [ 38.370123] ? lock_is_held_type+0x9f/0x120 [ 38.370861] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 38.371719] ? mtree_range_walk+0x632/0x900 [ 38.372474] ? mas_walk+0x5c7/0x7c0 [ 38.373132] do_vmi_munmap+0x1f1/0x2b0 [ 38.373815] mmap_region+0x1f9/0x2660 [ 38.374480] ? vm_mmap_pgoff+0x15c/0x3a0 [ 38.375181] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 38.376192] ? __pfx_lock_acquire+0x10/0x10 [ 38.376928] ? __pfx_mmap_region+0x10/0x10 [ 38.377655] ? security_mmap_addr+0x7d/0xa0 [ 38.378392] ? get_unmapped_area+0x1f5/0x3f0 [ 38.379138] do_mmap+0x854/0xf00 [ 38.379753] vm_mmap_pgoff+0x1a6/0x3a0 [ 38.380432] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 38.381200] ksys_mmap_pgoff+0x3af/0x500 [ 38.381904] do_syscall_64+0x3f/0x90 [ 38.382557] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.383438] RIP: 0033:0x7f2f9e01dd82 [ 38.384062] 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 [ 38.386976] RSP: 002b:00007ffe9c940d28 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 38.388260] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2f9e01dd82 [ 38.389436] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2f9d457000 [ 38.390578] RBP: 00007f2f9d457000 R08: 0000000000000009 R09: 0000000000001000 [ 38.391679] R10: 0000000000000812 R11: 0000000000000206 R12: 000055c0762d7ec0 [ 38.392536] R13: 00007ffe9c940d40 R14: 00007ffe9c940d70 R15: 00007ffe9c9410d0 [ 38.393393] [ 38.393687] [ 38.393909] Allocated by task 213: [ 38.394347] kasan_save_stack+0x22/0x50 [ 38.394861] kasan_set_track+0x25/0x30 [ 38.395366] __kasan_slab_alloc+0x59/0x70 [ 38.395918] kmem_cache_alloc+0x16b/0x370 [ 38.396440] vm_area_dup+0x20/0x160 [ 38.396895] __split_vma+0x170/0x950 [ 38.397370] split_vma+0xc6/0x110 [ 38.397812] mprotect_fixup+0x8d2/0xb30 [ 38.398319] do_mprotect_pkey+0x87e/0xd40 [ 38.398842] __x64_sys_mprotect+0x78/0xc0 [ 38.399361] do_syscall_64+0x3f/0x90 [ 38.399845] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.400495] [ 38.400714] Freed by task 203: [ 38.401109] kasan_save_stack+0x22/0x50 [ 38.401623] kasan_set_track+0x25/0x30 [ 38.402122] kasan_save_free_info+0x2b/0x50 [ 38.402660] __kasan_slab_free+0x10a/0x190 [ 38.403198] kmem_cache_free+0x10d/0x4d0 [ 38.403719] rcu_core+0x8c8/0x2860 [ 38.404167] __do_softirq+0x1b7/0x7d4 [ 38.404645] [ 38.404859] Last potentially related work creation: [ 38.405450] kasan_save_stack+0x22/0x50 [ 38.405955] __kasan_record_aux_stack+0x8e/0xa0 [ 38.406535] __call_rcu_common.constprop.0+0x6a/0xb90 [ 38.407186] remove_vma+0x139/0x170 [ 38.407665] do_vmi_align_munmap+0xd4a/0x11f0 [ 38.408232] do_vmi_munmap+0x1f1/0x2b0 [ 38.408723] __vm_munmap+0x138/0x3a0 [ 38.409193] __x64_sys_munmap+0x59/0x80 [ 38.409699] do_syscall_64+0x3f/0x90 [ 38.410180] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 38.410832] [ 38.411053] The buggy address belongs to the object at ffff88800e3d3910 [ 38.411053] which belongs to the cache vm_area_struct of size 168 [ 38.412583] The buggy address is located 88 bytes inside of [ 38.412583] freed 168-byte region [ffff88800e3d3910, ffff88800e3d39b8) [ 38.414010] [ 38.414236] The buggy address belongs to the physical page: [ 38.414915] page:00000000611d0ade refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe3d3 [ 38.416054] memcg:ffff88800c67cd01 [ 38.416488] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 38.417201] page_type: 0xffffffff() [ 38.417654] raw: 0100000000000200 ffff88800879fc80 ffffea0000359cc0 dead000000000003 [ 38.418580] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c67cd01 [ 38.419496] page dumped because: kasan: bad access detected [ 38.420158] [ 38.420378] Memory state around the buggy address: [ 38.420958] ffff88800e3d3800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 38.421826] ffff88800e3d3880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 38.422692] >ffff88800e3d3900: fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.423558] ^ [ 38.424349] ffff88800e3d3980: fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa [ 38.425221] ffff88800e3d3a00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 38.426121] ================================================================== [ 38.427115] Disabling lock debugging due to kernel taint [ 40.312201] BUG: Bad rss-counter state mm:00000000c83d992f type:MM_FILEPAGES val:33 [ 40.313775] BUG: Bad rss-counter state mm:00000000c83d992f type:MM_ANONPAGES val:22 [ 40.800588] BUG: Bad rss-counter state mm:0000000090faeb94 type:MM_FILEPAGES val:33 [ 40.802180] BUG: Bad rss-counter state mm:0000000090faeb94 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:15477' (ECDSA) to the list of known hosts. 2023/06/19 17:17:44 fuzzer started 2023/06/19 17:17:44 dialing manager at localhost:44161 2023/06/19 17:17:44 checking machine... 2023/06/19 17:17:44 checking revisions... [ 41.541177] kmemleak: Automatic memory scanning thread ended 2023/06/19 17:17:45 testing simple program... [ 41.593721] cgroup: Unknown subsys name 'net' [ 41.645136] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 17:17:35 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=0000000000000001 RCX=ffffffff81970f13 RDX=fffffbfff0ba77db RSI=0000000000000001 RDI=0000000000000000 RBP=0000000000000503 RSP=ffff888014627578 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6c88 R12=ffff888008a61000 R13=0000000000000000 R14=ffff888008a61000 R15=0000000000000503 RIP=ffffffff814c0324 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f57a344a900 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=00007f57a28748f0 CR3=000000000c9f4000 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=454d49544c4145525f454352554f535f XMM01=3d504d415453454d49545f454d49544c XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=de011bf87cd267fa00000000000ae988 XMM05=9bf5bb8e14f6d0c700000000001350f0 XMM06=e4cb8bb95a7664b60000000000133fa8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=dffffc0000000000 RBX=0000000000000000 RCX=0000000000000000 RDX=1ffff110012bbc01 RSI=ffffffff83c5ed43 RDI=ffff88800fe97730 RBP=ffff8880095de000 RSP=ffff88800fe97588 R8 =0000000000000005 R9 =0000000000000002 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000001 R13=0000000000000000 R14=ffff88800fe97728 R15=ffff88800c947b40 RIP=ffffffff83c5ed97 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 00007f6326648900 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=00007f6326bff618 CR3=0000000015e9c000 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=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