[ 31.150292] BUG: Bad rss-counter state mm:000000008361eda6 type:MM_FILEPAGES val:33 [ 31.151043] BUG: Bad rss-counter state mm:000000008361eda6 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.261515] ================================================================== [ 31.262152] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.262796] Read of size 8 at addr ffff88800ebdd140 by task sshd/219 [ 31.263380] [ 31.263534] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.264126] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.264744] Call Trace: [ 31.264959] [ 31.265145] dump_stack_lvl+0x91/0xf0 [ 31.265475] print_report+0xcc/0x620 [ 31.265991] ? __virt_addr_valid+0x102/0x340 [ 31.266353] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.266775] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267171] kasan_report+0xbe/0xf0 [ 31.267545] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.267983] vma_interval_tree_remove+0xc75/0xec0 [ 31.268398] vma_prepare+0xc54/0x11a0 [ 31.268727] __split_vma+0x5af/0x950 [ 31.269046] ? __pfx___split_vma+0x10/0x10 [ 31.269386] ? find_held_lock+0x2c/0x110 [ 31.269726] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.270098] ? lock_is_held_type+0x9f/0x120 [ 31.270461] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.270878] ? mtree_range_walk+0x632/0x900 [ 31.271258] ? mas_walk+0x5c7/0x7c0 [ 31.271655] do_vmi_munmap+0x1f1/0x2b0 [ 31.271981] mmap_region+0x1f9/0x2660 [ 31.272297] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.272630] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.273099] ? __pfx_lock_acquire+0x10/0x10 [ 31.273455] ? __pfx_mmap_region+0x10/0x10 [ 31.273801] ? security_mmap_addr+0x7d/0xa0 [ 31.274151] ? get_unmapped_area+0x1f5/0x3f0 [ 31.274512] do_mmap+0x854/0xf00 [ 31.274800] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.275126] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.275544] ksys_mmap_pgoff+0x3af/0x500 [ 31.275890] do_syscall_64+0x3f/0x90 [ 31.276216] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.276665] RIP: 0033:0x7fc67b2cdd82 [ 31.276982] 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 [ 31.278404] RSP: 002b:00007ffc8ae3e308 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.279038] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fc67b2cdd82 [ 31.279686] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fc67a707000 [ 31.280253] RBP: 00007fc67a707000 R08: 0000000000000009 R09: 0000000000001000 [ 31.280855] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556b4e4e6ec0 [ 31.281400] R13: 00007ffc8ae3e320 R14: 00007ffc8ae3e350 R15: 00007ffc8ae3e6b0 [ 31.281977] [ 31.282179] [ 31.282328] Allocated by task 212: [ 31.282624] kasan_save_stack+0x22/0x50 [ 31.282977] kasan_set_track+0x25/0x30 [ 31.283348] __kasan_slab_alloc+0x59/0x70 [ 31.283685] kmem_cache_alloc+0x16b/0x370 [ 31.284016] vm_area_dup+0x20/0x160 [ 31.284324] __split_vma+0x170/0x950 [ 31.284637] split_vma+0xc6/0x110 [ 31.284938] mprotect_fixup+0x8d2/0xb30 [ 31.285293] do_mprotect_pkey+0x87e/0xd40 [ 31.285654] __x64_sys_mprotect+0x78/0xc0 [ 31.286002] do_syscall_64+0x3f/0x90 [ 31.286314] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.286734] [ 31.286877] Freed by task 212: [ 31.287137] kasan_save_stack+0x22/0x50 [ 31.287506] kasan_set_track+0x25/0x30 [ 31.287827] kasan_save_free_info+0x2b/0x50 [ 31.288188] __kasan_slab_free+0x10a/0x190 [ 31.288550] kmem_cache_free+0x10d/0x4d0 [ 31.288897] rcu_core+0x8c8/0x2860 [ 31.289211] __do_softirq+0x1b7/0x7d4 [ 31.289541] [ 31.289685] Last potentially related work creation: [ 31.290071] kasan_save_stack+0x22/0x50 [ 31.290420] __kasan_record_aux_stack+0x8e/0xa0 [ 31.290818] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.291263] remove_vma+0x139/0x170 [ 31.291628] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.291936] do_vmi_munmap+0x1f1/0x2b0 [ 31.292198] __vm_munmap+0x138/0x3a0 [ 31.292449] __x64_sys_munmap+0x59/0x80 [ 31.292720] do_syscall_64+0x3f/0x90 [ 31.292977] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.293323] [ 31.293439] The buggy address belongs to the object at ffff88800ebdd0e8 [ 31.293439] which belongs to the cache vm_area_struct of size 168 [ 31.294238] The buggy address is located 88 bytes inside of [ 31.294238] freed 168-byte region [ffff88800ebdd0e8, ffff88800ebdd190) [ 31.294996] [ 31.295112] The buggy address belongs to the physical page: [ 31.295501] page:00000000f0303e1b refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xebdd [ 31.296087] memcg:ffff88800c601201 [ 31.296315] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.296667] page_type: 0xffffffff() [ 31.296911] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.297408] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c601201 [ 31.297901] page dumped because: kasan: bad access detected [ 31.298257] [ 31.298373] Memory state around the buggy address: [ 31.298688] ffff88800ebdd000: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.299151] ffff88800ebdd080: 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb fb [ 31.299645] >ffff88800ebdd100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.300107] ^ [ 31.300450] ffff88800ebdd180: fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.300909] ffff88800ebdd200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.301372] ================================================================== [ 31.302311] Disabling lock debugging due to kernel taint [ 33.230545] BUG: Bad rss-counter state mm:000000001c03ae46 type:MM_FILEPAGES val:33 [ 33.231224] BUG: Bad rss-counter state mm:000000001c03ae46 type:MM_ANONPAGES val:22 [ 33.590581] BUG: Bad rss-counter state mm:00000000e1dfb955 type:MM_FILEPAGES val:33 [ 33.591304] BUG: Bad rss-counter state mm:00000000e1dfb955 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:34654' (ECDSA) to the list of known hosts. 2023/06/20 09:32:21 fuzzer started 2023/06/20 09:32:22 dialing manager at localhost:44161 2023/06/20 09:32:22 checking machine... 2023/06/20 09:32:22 checking revisions... [ 34.156193] kmemleak: Automatic memory scanning thread ended 2023/06/20 09:32:22 testing simple program... [ 34.199890] cgroup: Unknown subsys name 'net' [ 34.252700] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 09:32:21 Registers: info registers vcpu 0 RAX=ffffffff846000aa RBX=0000000000000006 RCX=0000000000000001 RDX=0000000000000800 RSI=0000000000000006 RDI=ffff8880142ffc18 RBP=dffffc0000000000 RSP=ffff8880142ffb40 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000006 R13=0000000000000800 R14=ffff8880142ffbe8 R15=ffff88800995e260 RIP=ffffffff813ad613 RFL=00000292 [--S-A--] 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 00007fbbfc7ec900 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=00007fbbfbbde610 CR3=000000000d37a000 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=ffffffffffffffffffffffffffffffff XMM01=30306234386136303638616663356134 XMM02=38303062343861363036386166633561 XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=29324d458e073aea00000000000ae988 XMM05=84aeab1eddf988aa0000000000135700 XMM06=806171799158d96700000000001347a0 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=1ffff1100178dd43 RBX=ffff88800bc6e9e8 RCX=ffffffff812e00e5 RDX=dffffc0000000000 RSI=ffff88800e4c2800 RDI=ffff88800bc6ea18 RBP=ffff8880107e89f8 RSP=ffff888019a57c28 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6996 R12=ffff88800e4c2000 R13=0000000000000000 R14=ffff88800ed1fc28 R15=ffff88800ed1fbe0 RIP=ffffffff818474fe 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 00007fc118879900 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=00007fc118e30618 CR3=000000000e62a000 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=00000000000000000000000000000000 XMM01=6e69676f6c5f6d61702c78756e696c65 XMM02=755f6d61702c74696d7265705f6d6170 XMM03=2c766e655f6d61702c7374696d696c5f XMM04=6d61702c766e655f6d61702c7374696d XMM05=78696e755f6d61702c74696d7265705f XMM06=6469756e69676f6c5f6d61702c78756e XMM07=672065736f6c635f6e6f69737365733a XMM08=61662029286e65706f5f746964756100 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000