[ 23.659454] BUG: Bad rss-counter state mm:00000000d74d2a7b type:MM_FILEPAGES val:33 [ 23.661803] BUG: Bad rss-counter state mm:00000000d74d2a7b type:MM_ANONPAGES val:22 [ 23.814188] ================================================================== [ 23.815073] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.815958] Read of size 8 at addr ffff88800dde5058 by task sshd/219 [ 23.816702] [ 23.817029] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.817854] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.818778] Call Trace: [ 23.819079] [ 23.819517] dump_stack_lvl+0x91/0xf0 [ 23.820123] print_report+0xcc/0x620 [ 23.820740] ? __virt_addr_valid+0x102/0x340 [ 23.821425] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.822158] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.822911] kasan_report+0xbe/0xf0 [ 23.823513] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.824311] vma_interval_tree_remove+0xc75/0xec0 [ 23.825086] vma_prepare+0xc54/0x11a0 [ 23.825709] __split_vma+0x5af/0x950 [ 23.826315] ? __pfx___split_vma+0x10/0x10 [ 23.826984] ? find_held_lock+0x2c/0x110 [ 23.827670] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.828420] ? lock_is_held_type+0x9f/0x120 [ 23.829105] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.829794] ? mtree_range_walk+0x632/0x900 [ 23.830383] ? mas_walk+0x5c7/0x7c0 [ 23.830874] do_vmi_munmap+0x1f1/0x2b0 [ 23.831406] mmap_region+0x1f9/0x2660 [ 23.831893] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.832434] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.833152] ? __pfx_lock_acquire+0x10/0x10 [ 23.833708] ? __pfx_mmap_region+0x10/0x10 [ 23.834254] ? security_mmap_addr+0x7d/0xa0 [ 23.834816] ? get_unmapped_area+0x1f5/0x3f0 [ 23.835406] do_mmap+0x854/0xf00 [ 23.835866] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.836397] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.836968] ksys_mmap_pgoff+0x3af/0x500 [ 23.837492] do_syscall_64+0x3f/0x90 [ 23.837981] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.838666] RIP: 0033:0x7f1828da0d82 [ 23.839134] 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 [ 23.841341] RSP: 002b:00007ffdaac7b908 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 23.842248] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f1828da0d82 [ 23.843126] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f18281da000 [ 23.844008] RBP: 00007f18281da000 R08: 0000000000000009 R09: 0000000000001000 [ 23.844888] R10: 0000000000000812 R11: 0000000000000206 R12: 000055aeb38a7ec0 [ 23.845761] R13: 00007ffdaac7b920 R14: 00007ffdaac7b950 R15: 00007ffdaac7bcb0 [ 23.846641] [ 23.846937] [ 23.847158] Allocated by task 212: [ 23.847616] kasan_save_stack+0x22/0x50 [ 23.848120] kasan_set_track+0x25/0x30 [ 23.848663] __kasan_slab_alloc+0x59/0x70 [ 23.849195] kmem_cache_alloc+0x16b/0x370 [ 23.849734] vm_area_dup+0x20/0x160 [ 23.850190] __split_vma+0x170/0x950 [ 23.850677] split_vma+0xc6/0x110 [ 23.851124] mprotect_fixup+0x8d2/0xb30 [ 23.851665] do_mprotect_pkey+0x87e/0xd40 [ 23.852202] __x64_sys_mprotect+0x78/0xc0 [ 23.852759] do_syscall_64+0x3f/0x90 [ 23.853247] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.853926] [ 23.854145] Freed by task 19: [ 23.854550] kasan_save_stack+0x22/0x50 [ 23.855060] kasan_set_track+0x25/0x30 [ 23.855581] kasan_save_free_info+0x2b/0x50 [ 23.856119] __kasan_slab_free+0x10a/0x190 [ 23.856700] kmem_cache_free+0x10d/0x4d0 [ 23.857217] rcu_core+0x8c8/0x2860 [ 23.857855] __do_softirq+0x1b7/0x7d4 [ 23.858384] [ 23.858607] Last potentially related work creation: [ 23.859186] kasan_save_stack+0x22/0x50 [ 23.859714] __kasan_record_aux_stack+0x8e/0xa0 [ 23.860298] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.860956] remove_vma+0x139/0x170 [ 23.861426] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.861985] do_vmi_munmap+0x1f1/0x2b0 [ 23.862504] __vm_munmap+0x138/0x3a0 [ 23.862976] __x64_sys_munmap+0x59/0x80 [ 23.863505] do_syscall_64+0x3f/0x90 [ 23.863985] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.864663] [ 23.864882] Second to last potentially related work creation: [ 23.865585] kasan_save_stack+0x22/0x50 [ 23.866102] __kasan_record_aux_stack+0x8e/0xa0 [ 23.866694] __call_rcu_common.constprop.0+0x6a/0xb90 [ 23.867370] remove_vma+0x139/0x170 [ 23.867830] do_vmi_align_munmap+0xd4a/0x11f0 [ 23.868436] do_vmi_munmap+0x1f1/0x2b0 [ 23.868925] mmap_region+0x1f9/0x2660 [ 23.869429] do_mmap+0x854/0xf00 [ 23.869863] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.870386] ksys_mmap_pgoff+0x3af/0x500 [ 23.870886] do_syscall_64+0x3f/0x90 [ 23.871378] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.872036] [ 23.872257] The buggy address belongs to the object at ffff88800dde5000 [ 23.872257] which belongs to the cache vm_area_struct of size 168 [ 23.873787] The buggy address is located 88 bytes inside of [ 23.873787] freed 168-byte region [ffff88800dde5000, ffff88800dde50a8) [ 23.875320] [ 23.875552] The buggy address belongs to the physical page: [ 23.876258] page:00000000de304448 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xdde5 [ 23.877468] memcg:ffff88800e05ac01 [ 23.877920] flags: 0x100000000000200(slab|node=0|zone=1) [ 23.878616] page_type: 0xffffffff() [ 23.879102] raw: 0100000000000200 ffff8880087a0c80 ffffea00003d3f80 dead000000000002 [ 23.880107] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e05ac01 [ 23.881090] page dumped because: kasan: bad access detected [ 23.881807] [ 23.882034] Memory state around the buggy address: [ 23.882667] ffff88800dde4f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 23.883608] ffff88800dde4f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 23.884556] >ffff88800dde5000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 23.885465] ^ [ 23.886228] ffff88800dde5080: fb fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 [ 23.887165] ffff88800dde5100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 23.888088] ================================================================== [ 23.889114] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.784211] BUG: Bad rss-counter state mm:00000000b915814f type:MM_FILEPAGES val:33 [ 25.785771] BUG: Bad rss-counter state mm:00000000b915814f type:MM_ANONPAGES val:22 [ 26.288634] BUG: Bad rss-counter state mm:000000008c78550e type:MM_FILEPAGES val:33 [ 26.289820] BUG: Bad rss-counter state mm:000000008c78550e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:62979' (ECDSA) to the list of known hosts. 2023/06/21 04:47:13 fuzzer started 2023/06/21 04:47:14 dialing manager at localhost:36067 2023/06/21 04:47:14 checking machine... 2023/06/21 04:47:14 checking revisions... [ 27.011518] kmemleak: Automatic memory scanning thread ended 2023/06/21 04:47:14 testing simple program... [ 27.051208] cgroup: Unknown subsys name 'net' [ 27.118527] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 04:47:13 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff11003017efe RCX=0000000000000000 RDX=ffff888015cbd1c0 RSI=0000000000000000 RDI=0000000000000000 RBP=ffff88800fb0e000 RSP=ffff8880180bf7b8 R8 =0000000000000006 R9 =0000000000001000 R10=0000000000003eba R11=00000000000b6a61 R12=0000000000000003 R13=ffff888016754300 R14=0000000000000000 R15=0000000000001000 RIP=ffffffff814c0404 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 00007f25dceee700 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=00007f8fe64117d0 CR3=0000000019684000 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=2033313a37343a3430203132206e754a XMM01=73732878696e755f6d6170203a5d3832 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3832325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033313a37343a3430203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffffffff813ad470 RCX=0000000000000001 RDX=ffff88800cc1ff60 RSI=ffff88800cc1ff48 RDI=ffff88806cf09aa8 RBP=ffff88806cf09b30 RSP=ffff88806cf09a98 R8 =0000000000000001 R9 =ffff88806cf09ad8 R10=0000000000038001 R11=00000000000b5080 R12=ffff88806cf09b60 R13=0000000000000000 R14=ffff888015d351c0 R15=ffff88800f225180 RIP=ffffffff810bd05d RFL=00000296 [--S-AP-] 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 00007fe0dc29a900 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=00007ffdcd372000 CR3=0000000018132000 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=6720646572637465733a4d41503d706f 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