[ 23.894901] BUG: Bad rss-counter state mm:0000000060d1c6c8 type:MM_FILEPAGES val:33 [ 23.895609] BUG: Bad rss-counter state mm:0000000060d1c6c8 type:MM_ANONPAGES val:22 [ 24.057116] ================================================================== [ 24.058195] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.059306] Read of size 8 at addr ffff88800c6fc6b0 by task sshd/220 [ 24.060412] [ 24.060657] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.061529] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.062527] Call Trace: [ 24.062851] [ 24.063136] dump_stack_lvl+0x91/0xf0 [ 24.063633] print_report+0xcc/0x620 [ 24.064124] ? __virt_addr_valid+0x102/0x340 [ 24.064686] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.065304] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.065922] kasan_report+0xbe/0xf0 [ 24.066412] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.067046] vma_interval_tree_remove+0xc75/0xec0 [ 24.067650] vma_prepare+0xc54/0x11a0 [ 24.068128] __split_vma+0x5af/0x950 [ 24.068622] ? __pfx___split_vma+0x10/0x10 [ 24.069155] ? find_held_lock+0x2c/0x110 [ 24.069670] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.070232] ? lock_is_held_type+0x9f/0x120 [ 24.070775] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.071374] ? mtree_range_walk+0x632/0x900 [ 24.071925] ? mas_walk+0x5c7/0x7c0 [ 24.072403] do_vmi_munmap+0x1f1/0x2b0 [ 24.072900] mmap_region+0x1f9/0x2660 [ 24.073377] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.073889] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.074599] ? __pfx_lock_acquire+0x10/0x10 [ 24.075143] ? __pfx_mmap_region+0x10/0x10 [ 24.075687] ? security_mmap_addr+0x7d/0xa0 [ 24.076229] ? get_unmapped_area+0x1f5/0x3f0 [ 24.076813] do_mmap+0x854/0xf00 [ 24.077266] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.077760] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.078333] ksys_mmap_pgoff+0x3af/0x500 [ 24.078849] do_syscall_64+0x3f/0x90 [ 24.079336] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.080005] RIP: 0033:0x7f5389ff4d82 [ 24.080475] 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 [ 24.082635] RSP: 002b:00007fff50b1f718 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.083543] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f5389ff4d82 [ 24.084388] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f538942e000 [ 24.085284] RBP: 00007f538942e000 R08: 0000000000000009 R09: 0000000000001000 [ 24.086146] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559d8ca5fec0 [ 24.087001] R13: 00007fff50b1f730 R14: 00007fff50b1f760 R15: 00007fff50b1fac0 [ 24.087877] [ 24.088173] [ 24.088387] Allocated by task 213: [ 24.088825] kasan_save_stack+0x22/0x50 [ 24.089326] kasan_set_track+0x25/0x30 [ 24.089818] __kasan_slab_alloc+0x59/0x70 [ 24.090342] kmem_cache_alloc+0x16b/0x370 [ 24.090891] vm_area_dup+0x20/0x160 [ 24.091344] __split_vma+0x170/0x950 [ 24.091807] split_vma+0xc6/0x110 [ 24.092255] mprotect_fixup+0x8d2/0xb30 [ 24.092767] do_mprotect_pkey+0x87e/0xd40 [ 24.093288] __x64_sys_mprotect+0x78/0xc0 [ 24.093806] do_syscall_64+0x3f/0x90 [ 24.094280] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.094918] [ 24.095134] Freed by task 211: [ 24.095526] kasan_save_stack+0x22/0x50 [ 24.096035] kasan_set_track+0x25/0x30 [ 24.096546] kasan_save_free_info+0x2b/0x50 [ 24.097082] __kasan_slab_free+0x10a/0x190 [ 24.097614] kmem_cache_free+0x10d/0x4d0 [ 24.098137] rcu_core+0x8c8/0x2860 [ 24.098588] __do_softirq+0x1b7/0x7d4 [ 24.099071] [ 24.099290] Last potentially related work creation: [ 24.099896] kasan_save_stack+0x22/0x50 [ 24.100403] __kasan_record_aux_stack+0x8e/0xa0 [ 24.100996] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.101714] remove_vma+0x139/0x170 [ 24.102160] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.102710] do_vmi_munmap+0x1f1/0x2b0 [ 24.103189] __vm_munmap+0x138/0x3a0 [ 24.103650] __x64_sys_munmap+0x59/0x80 [ 24.104150] do_syscall_64+0x3f/0x90 [ 24.104646] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.105288] [ 24.105506] The buggy address belongs to the object at ffff88800c6fc658 [ 24.105506] which belongs to the cache vm_area_struct of size 168 [ 24.106956] The buggy address is located 88 bytes inside of [ 24.106956] freed 168-byte region [ffff88800c6fc658, ffff88800c6fc700) [ 24.108358] [ 24.108582] The buggy address belongs to the physical page: [ 24.109241] page:000000001d1bde14 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xc6fc [ 24.110321] memcg:ffff88800d523801 [ 24.110756] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.111456] page_type: 0xffffffff() [ 24.111902] raw: 0100000000000200 ffff8880087a0c80 ffffea0000336b00 dead000000000003 [ 24.112841] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d523801 [ 24.113750] page dumped because: kasan: bad access detected [ 24.114401] [ 24.114618] Memory state around the buggy address: [ 24.115191] ffff88800c6fc580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.116044] ffff88800c6fc600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 24.116910] >ffff88800c6fc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.117762] ^ [ 24.118342] ffff88800c6fc700: fc fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb [ 24.119195] ffff88800c6fc780: fb fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc [ 24.120064] ================================================================== [ 24.121103] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.274463] BUG: Bad rss-counter state mm:00000000cc030761 type:MM_FILEPAGES val:33 [ 26.276448] BUG: Bad rss-counter state mm:00000000cc030761 type:MM_ANONPAGES val:22 [ 26.793838] BUG: Bad rss-counter state mm:00000000c61c36b6 type:MM_FILEPAGES val:33 [ 26.795127] BUG: Bad rss-counter state mm:00000000c61c36b6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:1772' (ECDSA) to the list of known hosts. 2023/06/21 06:00:12 fuzzer started 2023/06/21 06:00:13 dialing manager at localhost:36067 2023/06/21 06:00:13 checking machine... 2023/06/21 06:00:13 checking revisions... [ 27.497666] kmemleak: Automatic memory scanning thread ended 2023/06/21 06:00:13 testing simple program... [ 27.595625] cgroup: Unknown subsys name 'net' [ 27.701526] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 06:00:12 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffffffff813ad470 RCX=ffff888008d9fa18 RDX=1ffff110011b3f3a RSI=ffffffff813ad720 RDI=ffff888008d9fa40 RBP=ffff888008d9fa10 RSP=ffff888008d9f970 R8 =0000000000000001 R9 =ffff888008d9f9b8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888008d9fa40 R13=0000000000000000 R14=ffff888008d90000 R15=ffff88800e25bd90 RIP=ffffffff813ad47e RFL=00000282 [--S----] 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=00007fe45a4ec7d0 CR3=000000000dab0000 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=2032313a30303a3630203132206e754a XMM01=73732878696e755f6d6170203a5d3133 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3133325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732032313a30303a3630203132 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff818cc13d RBX=ffffffff813ad470 RCX=0000000000000001 RDX=1ffff1100341af31 RSI=ffffffff818cc13d RDI=ffff88801a0d79f8 RBP=ffff88801a0d79c8 RSP=ffff88801a0d7928 R8 =0000000000000001 R9 =ffff88801a0d7970 R10=0000000000038001 R11=0000000000024026 R12=ffff88801a0d79f8 R13=0000000000000000 R14=ffff888015f99b40 R15=ffff88800ca2ba00 RIP=ffffffff813ad474 RFL=00000282 [--S----] 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 00007f4808a56900 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=00007fff9fb34000 CR3=000000000ec52000 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