[ 184.178432] BUG: Bad rss-counter state mm:00000000a0a35fb7 type:MM_FILEPAGES val:33 [ 184.179407] BUG: Bad rss-counter state mm:00000000a0a35fb7 type:MM_ANONPAGES val:22 [ 184.343085] ================================================================== [ 184.344015] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 184.344948] Read of size 8 at addr ffff888016b6cb38 by task sshd/227 [ 184.345821] [ 184.346038] CPU: 0 PID: 227 Comm: sshd Tainted: G L 6.4.0-rc7-next-20230619 #1 [ 184.347053] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 184.348083] Call Trace: [ 184.348408] [ 184.348690] dump_stack_lvl+0x91/0xf0 [ 184.349185] print_report+0xcc/0x620 [ 184.349671] ? __virt_addr_valid+0x102/0x340 [ 184.350225] ? vma_interval_tree_remove+0xc75/0xec0 [ 184.350858] ? vma_interval_tree_remove+0xc75/0xec0 [ 184.351515] kasan_report+0xbe/0xf0 [ 184.351991] ? vma_interval_tree_remove+0xc75/0xec0 [ 184.352623] vma_interval_tree_remove+0xc75/0xec0 [ 184.353230] vma_prepare+0xc54/0x11a0 [ 184.353726] __split_vma+0x5af/0x950 [ 184.354212] ? __pfx___split_vma+0x10/0x10 [ 184.354750] ? find_held_lock+0x2c/0x110 [ 184.355308] do_vmi_align_munmap+0x2ba/0x11f0 [ 184.355883] ? lock_is_held_type+0x9f/0x120 [ 184.356431] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 184.357040] ? mtree_range_walk+0x632/0x900 [ 184.357597] ? mas_walk+0x5c7/0x7c0 [ 184.358076] do_vmi_munmap+0x1f1/0x2b0 [ 184.358576] mmap_region+0x1f9/0x2660 [ 184.359068] ? vm_mmap_pgoff+0x15c/0x3a0 [ 184.359616] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 184.360345] ? __pfx_lock_acquire+0x10/0x10 [ 184.360880] ? __pfx_mmap_region+0x10/0x10 [ 184.361416] ? security_mmap_addr+0x7d/0xa0 [ 184.361946] ? get_unmapped_area+0x1f5/0x3f0 [ 184.362496] do_mmap+0x854/0xf00 [ 184.362939] vm_mmap_pgoff+0x1a6/0x3a0 [ 184.363484] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 184.364049] ksys_mmap_pgoff+0x3af/0x500 [ 184.364560] do_syscall_64+0x3f/0x90 [ 184.365042] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 184.365687] RIP: 0033:0x7fe7ad831d82 [ 184.366144] 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 [ 184.368305] RSP: 002b:00007ffea8b72898 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 184.369218] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fe7ad831d82 [ 184.370069] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fe7acc6b000 [ 184.370913] RBP: 00007fe7acc6b000 R08: 0000000000000009 R09: 0000000000001000 [ 184.371942] R10: 0000000000000812 R11: 0000000000000206 R12: 0000559aea998ec0 [ 184.372955] R13: 00007ffea8b728b0 R14: 00007ffea8b728e0 R15: 00007ffea8b72c40 [ 184.373962] [ 184.374307] [ 184.374563] Allocated by task 213: [ 184.375068] kasan_save_stack+0x22/0x50 [ 184.375693] kasan_set_track+0x25/0x30 [ 184.376281] __kasan_slab_alloc+0x59/0x70 [ 184.376909] kmem_cache_alloc+0x16b/0x370 [ 184.377530] vm_area_dup+0x20/0x160 [ 184.378096] __split_vma+0x170/0x950 [ 184.378674] split_vma+0xc6/0x110 [ 184.379220] mprotect_fixup+0x8d2/0xb30 [ 184.379852] do_mprotect_pkey+0x87e/0xd40 [ 184.380499] __x64_sys_mprotect+0x78/0xc0 [ 184.381151] do_syscall_64+0x3f/0x90 [ 184.381744] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 184.382552] [ 184.382813] Freed by task 213: [ 184.383310] kasan_save_stack+0x22/0x50 [ 184.383941] kasan_set_track+0x25/0x30 [ 184.384559] kasan_save_free_info+0x2b/0x50 [ 184.385224] __kasan_slab_free+0x10a/0x190 [ 184.385882] kmem_cache_free+0x10d/0x4d0 [ 184.386516] rcu_core+0x8c8/0x2860 [ 184.387070] __do_softirq+0x1b7/0x7d4 [ 184.387649] [ 184.387868] Last potentially related work creation: [ 184.388448] kasan_save_stack+0x22/0x50 [ 184.388948] __kasan_record_aux_stack+0x8e/0xa0 [ 184.389516] __call_rcu_common.constprop.0+0x6a/0xb90 [ 184.390162] remove_vma+0x139/0x170 [ 184.390615] do_vmi_align_munmap+0xd4a/0x11f0 [ 184.391168] do_vmi_munmap+0x1f1/0x2b0 [ 184.391670] __vm_munmap+0x138/0x3a0 [ 184.392137] __x64_sys_munmap+0x59/0x80 [ 184.392652] do_syscall_64+0x3f/0x90 [ 184.393127] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 184.393772] [ 184.393990] The buggy address belongs to the object at ffff888016b6cae0 [ 184.393990] which belongs to the cache vm_area_struct of size 168 [ 184.395464] The buggy address is located 88 bytes inside of [ 184.395464] freed 168-byte region [ffff888016b6cae0, ffff888016b6cb88) [ 184.396861] [ 184.397079] The buggy address belongs to the physical page: [ 184.397731] page:00000000fb958567 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16b6c [ 184.398818] memcg:ffff88801421be01 [ 184.399260] flags: 0x100000000000200(slab|node=0|zone=1) [ 184.399901] page_type: 0xffffffff() [ 184.400354] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 184.401276] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88801421be01 [ 184.402191] page dumped because: kasan: bad access detected [ 184.402858] [ 184.403075] Memory state around the buggy address: [ 184.403671] ffff888016b6ca00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 184.404527] ffff888016b6ca80: 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb [ 184.405388] >ffff888016b6cb00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 184.406235] ^ [ 184.406838] ffff888016b6cb80: fb fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 [ 184.407712] ffff888016b6cc00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc [ 184.408559] ================================================================== [ 184.409524] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 187.057204] BUG: Bad rss-counter state mm:000000008cd486a7 type:MM_FILEPAGES val:33 [ 187.058362] BUG: Bad rss-counter state mm:000000008cd486a7 type:MM_ANONPAGES val:22 [ 187.528332] BUG: Bad rss-counter state mm:0000000062877ee4 type:MM_FILEPAGES val:33 [ 187.529972] BUG: Bad rss-counter state mm:0000000062877ee4 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:25877' (ECDSA) to the list of known hosts. 2023/06/19 12:16:14 fuzzer started 2023/06/19 12:16:15 dialing manager at localhost:44161 2023/06/19 12:16:15 checking machine... 2023/06/19 12:16:15 checking revisions... [ 188.302412] kmemleak: Automatic memory scanning thread ended 2023/06/19 12:16:15 testing simple program... [ 188.352618] cgroup: Unknown subsys name 'net' [ 188.390514] cgroup: Unknown subsys name 'rlimit' executing program [ 191.396432] kmemleak: 2 new suspected memory leaks (see /sys/kernel/debug/kmemleak) executing program executing program VM DIAGNOSIS: 12:14:41 Registers: info registers vcpu 0 RAX=0000000000000001 RBX=00007f012a672da8 RCX=0000000000000000 RDX=0000000000000000 RSI=00007f012b234740 RDI=000055c3ea073000 RBP=00007f012a672da8 RSP=00007fff197ffa28 R8 =000055c3ea0530d0 R9 =0000000000000000 R10=0000000000000003 R11=0000000200000000 R12=000055c3ea073000 R13=0000000000000021 R14=0000000000000020 R15=0000000000000000 RIP=00007f012a6700e7 RFL=00000246 [---Z-P-] CPL=3 II=0 A20=1 SMM=0 HLT=0 ES =0000 0000000000000000 00000000 00000000 CS =0033 0000000000000000 ffffffff 00a0fb00 DPL=3 CS64 [-RA] SS =002b 0000000000000000 ffffffff 00c0f300 DPL=3 DS [-WA] DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f012a6a9900 00000000 00000000 GS =0000 0000000000000000 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=00007f012a678008 CR3=000000000c642000 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=0000000000000071 RBX=ffff88806cf3a360 RCX=1ffff1100d9e745c RDX=1ffff1100d9e7475 RSI=ffff88800f34d408 RDI=ffff88806cf3a3a8 RBP=0000000000000200 RSP=ffff8880101775c8 R8 =ffffffff85616740 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=ffffffff844932d0 R13=ffff88806cf3a3a8 R14=ffff88806cf3a2c0 R15=0000000000000000 RIP=ffffffff81380674 RFL=00000046 [---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 00007f4c8cf6f900 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=00007f4c8d40b710 CR3=000000000c47e000 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=ff00ffffffffffff0000000000000000 XMM01=0100010001000000ffffffffffffffff XMM02=0500050005000000455441564952505f XMM03=0000000000000000000000564952505f XMM04=00030005000500050005000000455441 XMM05=00007f4c8d528f6000007f4c8d6e2950 XMM06=00007f4c8d6e244000007f4c8d6e1f20 XMM07=00007f4c8d02c12000007f4c8d02bb10 XMM08=00007f4c8d02b5f000007f4c8d02b060 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000