[ 48.936394] BUG: Bad rss-counter state mm:00000000324345a7 type:MM_FILEPAGES val:33 [ 48.937713] BUG: Bad rss-counter state mm:00000000324345a7 type:MM_ANONPAGES val:22 [ 49.065332] ================================================================== [ 49.066017] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 49.066734] Read of size 8 at addr ffff888017d93058 by task sshd/226 [ 49.067322] [ 49.067495] CPU: 0 PID: 226 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 49.068152] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 49.068893] Call Trace: [ 49.069229] [ 49.069451] dump_stack_lvl+0x91/0xf0 [ 49.069823] print_report+0xcc/0x620 [ 49.070194] ? __virt_addr_valid+0x102/0x340 [ 49.070611] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.071079] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.071563] kasan_report+0xbe/0xf0 [ 49.071928] ? vma_interval_tree_remove+0xc75/0xec0 [ 49.072402] vma_interval_tree_remove+0xc75/0xec0 [ 49.072850] vma_prepare+0xc54/0x11a0 [ 49.073216] __split_vma+0x5af/0x950 [ 49.073573] ? __pfx___split_vma+0x10/0x10 [ 49.073966] ? find_held_lock+0x2c/0x110 [ 49.074359] do_vmi_align_munmap+0x2ba/0x11f0 [ 49.074782] ? lock_is_held_type+0x9f/0x120 [ 49.075184] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 49.075645] ? mtree_range_walk+0x632/0x900 [ 49.076064] ? mas_walk+0x5c7/0x7c0 [ 49.076420] do_vmi_munmap+0x1f1/0x2b0 [ 49.076787] mmap_region+0x1f9/0x2660 [ 49.077155] ? vm_mmap_pgoff+0x15c/0x3a0 [ 49.077539] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 49.078070] ? __pfx_lock_acquire+0x10/0x10 [ 49.078476] ? __pfx_mmap_region+0x10/0x10 [ 49.078878] ? security_mmap_addr+0x7d/0xa0 [ 49.079287] ? get_unmapped_area+0x1f5/0x3f0 [ 49.079720] do_mmap+0x854/0xf00 [ 49.080052] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.080426] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 49.080854] ksys_mmap_pgoff+0x3af/0x500 [ 49.081239] do_syscall_64+0x3f/0x90 [ 49.081602] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.082091] RIP: 0033:0x7f433e5b0d82 [ 49.082440] 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 [ 49.084065] RSP: 002b:00007fffbe748938 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 49.084752] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f433e5b0d82 [ 49.085395] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f433d9ea000 [ 49.086043] RBP: 00007f433d9ea000 R08: 0000000000000009 R09: 0000000000001000 [ 49.086689] R10: 0000000000000812 R11: 0000000000000206 R12: 000055b69bd54d90 [ 49.087327] R13: 00007fffbe748950 R14: 00007fffbe748980 R15: 00007fffbe748ce0 [ 49.087983] [ 49.088205] [ 49.088368] Allocated by task 213: [ 49.088692] kasan_save_stack+0x22/0x50 [ 49.089080] kasan_set_track+0x25/0x30 [ 49.089453] __kasan_slab_alloc+0x59/0x70 [ 49.089850] kmem_cache_alloc+0x16b/0x370 [ 49.090237] vm_area_dup+0x20/0x160 [ 49.090582] __split_vma+0x170/0x950 [ 49.090939] split_vma+0xc6/0x110 [ 49.091274] mprotect_fixup+0x8d2/0xb30 [ 49.091671] do_mprotect_pkey+0x87e/0xd40 [ 49.092075] __x64_sys_mprotect+0x78/0xc0 [ 49.092473] do_syscall_64+0x3f/0x90 [ 49.092829] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.093309] [ 49.093474] Freed by task 213: [ 49.093772] kasan_save_stack+0x22/0x50 [ 49.094151] kasan_set_track+0x25/0x30 [ 49.094521] kasan_save_free_info+0x2b/0x50 [ 49.094922] __kasan_slab_free+0x10a/0x190 [ 49.095324] kmem_cache_free+0x10d/0x4d0 [ 49.095719] rcu_core+0x8c8/0x2860 [ 49.096055] __do_softirq+0x1b7/0x7d4 [ 49.096416] [ 49.096578] Last potentially related work creation: [ 49.097020] kasan_save_stack+0x22/0x50 [ 49.097400] __kasan_record_aux_stack+0x8e/0xa0 [ 49.097835] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.098337] remove_vma+0x139/0x170 [ 49.098694] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.099131] do_vmi_munmap+0x1f1/0x2b0 [ 49.099517] __vm_munmap+0x138/0x3a0 [ 49.099875] __x64_sys_munmap+0x59/0x80 [ 49.100267] do_syscall_64+0x3f/0x90 [ 49.100627] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.101115] [ 49.101281] Second to last potentially related work creation: [ 49.101793] kasan_save_stack+0x22/0x50 [ 49.102177] __kasan_record_aux_stack+0x8e/0xa0 [ 49.102610] __call_rcu_common.constprop.0+0x6a/0xb90 [ 49.103098] remove_vma+0x139/0x170 [ 49.103440] do_vmi_align_munmap+0xd4a/0x11f0 [ 49.103875] do_vmi_munmap+0x1f1/0x2b0 [ 49.104245] mmap_region+0x1f9/0x2660 [ 49.104604] do_mmap+0x854/0xf00 [ 49.104929] vm_mmap_pgoff+0x1a6/0x3a0 [ 49.105307] ksys_mmap_pgoff+0x3af/0x500 [ 49.105690] do_syscall_64+0x3f/0x90 [ 49.106044] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 49.106529] [ 49.106692] The buggy address belongs to the object at ffff888017d93000 [ 49.106692] which belongs to the cache vm_area_struct of size 168 [ 49.107815] The buggy address is located 88 bytes inside of [ 49.107815] freed 168-byte region [ffff888017d93000, ffff888017d930a8) [ 49.108881] [ 49.109046] The buggy address belongs to the physical page: [ 49.109547] page:00000000fcac8ca4 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17d93 [ 49.110375] memcg:ffff88800e1d5901 [ 49.110697] flags: 0x100000000000200(slab|node=0|zone=1) [ 49.111193] page_type: 0xffffffff() [ 49.111544] raw: 0100000000000200 ffff88800879fc80 ffffea0000354ec0 dead000000000002 [ 49.112244] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e1d5901 [ 49.112926] page dumped because: kasan: bad access detected [ 49.113432] [ 49.113595] Memory state around the buggy address: [ 49.114029] ffff888017d92f00: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc [ 49.114680] ffff888017d92f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 49.115331] >ffff888017d93000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.115992] ^ [ 49.116542] ffff888017d93080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 49.117188] ffff888017d93100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 49.117833] ================================================================== [ 49.118569] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 50.582352] BUG: Bad rss-counter state mm:0000000020a5af6d type:MM_FILEPAGES val:33 [ 50.582883] BUG: Bad rss-counter state mm:0000000020a5af6d type:MM_ANONPAGES val:22 [ 50.943404] BUG: Bad rss-counter state mm:000000004e2e1fc0 type:MM_FILEPAGES val:33 [ 50.944502] BUG: Bad rss-counter state mm:000000004e2e1fc0 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:6431' (ECDSA) to the list of known hosts. 2023/06/19 12:42:24 fuzzer started 2023/06/19 12:42:24 dialing manager at localhost:44161 2023/06/19 12:42:24 checking machine... 2023/06/19 12:42:24 checking revisions... [ 51.649773] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:42:24 testing simple program... [ 51.692293] cgroup: Unknown subsys name 'net' [ 51.751586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 12:42:06 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000001255 RCX=ffffffff8171ae90 RDX=0000000000000000 RSI=0000000000000000 RDI=0000000000000005 RBP=0000000000000000 RSP=ffff888019f07e70 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000000 R13=00007f63af0d30f0 R14=0000000000000200 R15=0000000000000040 RIP=ffffffff814c01d0 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 00007f63ae530900 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=00007f63af0d30f0 CR3=000000000e3ce000 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=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 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=00007efcd4038870 CR3=00000000169ea000 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=2033323a32343a3231203931206e754a XMM01=73732878696e755f6d6170203a5d3533 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3533325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732033323a32343a3231203931 XMM08=753a725f7463656a626f3a755f6d6574 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000