syzkaller login: [ 35.491302] BUG: Bad rss-counter state mm:00000000af973cd5 type:MM_FILEPAGES val:33 [ 35.495615] BUG: Bad rss-counter state mm:00000000af973cd5 type:MM_ANONPAGES val:22 [ 35.673942] ================================================================== [ 35.674524] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 35.675125] Read of size 8 at addr ffff888008ed4228 by task sshd/225 [ 35.675674] [ 35.675811] CPU: 1 PID: 225 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 35.676342] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 35.676951] Call Trace: [ 35.677158] [ 35.677334] dump_stack_lvl+0x91/0xf0 [ 35.677653] print_report+0xcc/0x620 [ 35.677964] ? __virt_addr_valid+0x102/0x340 [ 35.678316] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.678703] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.679096] kasan_report+0xbe/0xf0 [ 35.679389] ? vma_interval_tree_remove+0xc75/0xec0 [ 35.679830] vma_interval_tree_remove+0xc75/0xec0 [ 35.680216] vma_prepare+0xc54/0x11a0 [ 35.680520] __split_vma+0x5af/0x950 [ 35.680813] ? __pfx___split_vma+0x10/0x10 [ 35.681144] ? find_held_lock+0x2c/0x110 [ 35.681480] do_vmi_align_munmap+0x2ba/0x11f0 [ 35.681843] ? lock_is_held_type+0x9f/0x120 [ 35.682185] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 35.682577] ? mtree_range_walk+0x632/0x900 [ 35.682919] ? mas_walk+0x5c7/0x7c0 [ 35.683211] do_vmi_munmap+0x1f1/0x2b0 [ 35.683535] mmap_region+0x1f9/0x2660 [ 35.683837] ? vm_mmap_pgoff+0x15c/0x3a0 [ 35.688980] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 35.689432] ? __pfx_lock_acquire+0x10/0x10 [ 35.689760] ? __pfx_mmap_region+0x10/0x10 [ 35.690083] ? security_mmap_addr+0x7d/0xa0 [ 35.690417] ? get_unmapped_area+0x1f5/0x3f0 [ 35.690792] do_mmap+0x854/0xf00 [ 35.691064] vm_mmap_pgoff+0x1a6/0x3a0 [ 35.691389] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 35.693051] ksys_mmap_pgoff+0x3af/0x500 [ 35.693383] do_syscall_64+0x3f/0x90 [ 35.693693] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.694088] RIP: 0033:0x7f04eec5fd82 [ 35.694368] 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 [ 35.695779] RSP: 002b:00007ffe3b3d7d38 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 35.696331] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f04eec5fd82 [ 35.696897] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f04ee099000 [ 35.697441] RBP: 00007f04ee099000 R08: 0000000000000009 R09: 0000000000001000 [ 35.697961] R10: 0000000000000812 R11: 0000000000000206 R12: 000055dea6820f70 [ 35.698497] R13: 00007ffe3b3d7d50 R14: 00007ffe3b3d7d80 R15: 00007ffe3b3d80e0 [ 35.699048] [ 35.699229] [ 35.699371] Allocated by task 215: [ 35.699691] kasan_save_stack+0x22/0x50 [ 35.700003] kasan_set_track+0x25/0x30 [ 35.700305] __kasan_slab_alloc+0x59/0x70 [ 35.700667] kmem_cache_alloc+0x16b/0x370 [ 35.700985] vm_area_dup+0x20/0x160 [ 35.701267] __split_vma+0x170/0x950 [ 35.701583] split_vma+0xc6/0x110 [ 35.701851] mprotect_fixup+0x8d2/0xb30 [ 35.702160] do_mprotect_pkey+0x87e/0xd40 [ 35.702478] __x64_sys_mprotect+0x78/0xc0 [ 35.702796] do_syscall_64+0x3f/0x90 [ 35.703087] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.703506] [ 35.703660] Freed by task 215: [ 35.703903] kasan_save_stack+0x22/0x50 [ 35.704213] kasan_set_track+0x25/0x30 [ 35.704542] kasan_save_free_info+0x2b/0x50 [ 35.704870] __kasan_slab_free+0x10a/0x190 [ 35.705197] kmem_cache_free+0x10d/0x4d0 [ 35.705535] rcu_core+0x8c8/0x2860 [ 35.705832] __do_softirq+0x1b7/0x7d4 [ 35.706125] [ 35.706260] Last potentially related work creation: [ 35.706646] kasan_save_stack+0x22/0x50 [ 35.706954] __kasan_record_aux_stack+0x8e/0xa0 [ 35.707304] __call_rcu_common.constprop.0+0x6a/0xb90 [ 35.707797] remove_vma+0x139/0x170 [ 35.708086] do_vmi_align_munmap+0xd4a/0x11f0 [ 35.708430] do_vmi_munmap+0x1f1/0x2b0 [ 35.708728] __vm_munmap+0x138/0x3a0 [ 35.709013] __x64_sys_munmap+0x59/0x80 [ 35.709318] do_syscall_64+0x3f/0x90 [ 35.709616] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 35.710009] [ 35.710143] The buggy address belongs to the object at ffff888008ed41d0 [ 35.710143] which belongs to the cache vm_area_struct of size 168 [ 35.720104] The buggy address is located 88 bytes inside of [ 35.720104] freed 168-byte region [ffff888008ed41d0, ffff888008ed4278) [ 35.720972] [ 35.721106] The buggy address belongs to the physical page: [ 35.721542] page:000000007a672dff refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x8ed4 [ 35.722200] memcg:ffff88800c648801 [ 35.722468] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 35.722942] page_type: 0xffffffff() [ 35.723225] raw: 0100000000000200 ffff88800879fc80 0000000000000000 dead000000000001 [ 35.723866] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c648801 [ 35.724417] page dumped because: kasan: bad access detected [ 35.724830] [ 35.724963] Memory state around the buggy address: [ 35.725318] ffff888008ed4100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 35.725869] ffff888008ed4180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 35.726388] >ffff888008ed4200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 35.726914] ^ [ 35.727255] ffff888008ed4280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 35.727837] ffff888008ed4300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 35.728355] ================================================================== [ 35.729074] Disabling lock debugging due to kernel taint [ 37.744894] BUG: Bad rss-counter state mm:0000000091660370 type:MM_FILEPAGES val:33 [ 37.745517] BUG: Bad rss-counter state mm:0000000091660370 type:MM_ANONPAGES val:22 [ 38.619578] BUG: Bad rss-counter state mm:000000001ec8f618 type:MM_FILEPAGES val:33 [ 38.620223] BUG: Bad rss-counter state mm:000000001ec8f618 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:52544' (ECDSA) to the list of known hosts. 2023/06/20 10:09:51 fuzzer started 2023/06/20 10:09:52 dialing manager at localhost:44161 2023/06/20 10:09:52 checking machine... 2023/06/20 10:09:52 checking revisions... [ 39.389793] kmemleak: Automatic memory scanning thread ended 2023/06/20 10:09:52 testing simple program... [ 39.444209] cgroup: Unknown subsys name 'net' [ 39.553007] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 10:09:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000001 RCX=ffffffff8453084b RDX=fffffbfff0ac3014 RSI=0000000000000004 RDI=ffffffff85618098 RBP=ffffffff85618098 RSP=ffff888008d87bb0 R8 =0000000000000000 R9 =fffffbfff0ac3013 R10=ffffffff8561809b R11=0000000000000000 R12=0000000000000003 R13=fffffbfff0ac3013 R14=0000000000000001 R15=1ffff110011b0f77 RIP=ffffffff845308c8 RFL=00000002 [-------] 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 0000000000000000 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=00007f2780e1e328 CR3=0000000005482000 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=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff81f07e10 RBX=ffffffff852c78d8 RCX=0000000000000000 RDX=ffff8880178d1b40 RSI=ffffffff81ef148f RDI=ffff88800ecbac80 RBP=dffffc0000000000 RSP=ffff888018d7fa78 R8 =ffff888018d7fa30 R9 =0000000000000000 R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000008000 R13=ffff88800ecbac80 R14=0000000000000000 R15=ffff888018d7fdf0 RIP=ffffffff81f07e14 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 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=00007fd2cd2ae298 CR3=000000000da14000 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=756e696c2d34365f3638782f62696c2f XMM01=2e6f747079726362696c2f756e672d78 XMM02=00312e312e6f732e6f74707972636269 XMM03=6c2f756e672d78756e696c2d34365f36 XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000