[ 31.220141] BUG: Bad rss-counter state mm:00000000ef6a2bbd type:MM_FILEPAGES val:33 [ 31.221115] BUG: Bad rss-counter state mm:00000000ef6a2bbd type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 31.384048] ================================================================== [ 31.385165] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.386345] Read of size 8 at addr ffff888019d91228 by task sshd/220 [ 31.387120] [ 31.387342] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.388210] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.389223] Call Trace: [ 31.389546] [ 31.389837] dump_stack_lvl+0x91/0xf0 [ 31.390341] print_report+0xcc/0x620 [ 31.390831] ? __virt_addr_valid+0x102/0x340 [ 31.391393] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.392025] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.392648] kasan_report+0xbe/0xf0 [ 31.393148] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.393779] vma_interval_tree_remove+0xc75/0xec0 [ 31.394383] vma_prepare+0xc54/0x11a0 [ 31.394869] __split_vma+0x5af/0x950 [ 31.395343] ? __pfx___split_vma+0x10/0x10 [ 31.395879] ? find_held_lock+0x2c/0x110 [ 31.396409] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.396979] ? lock_is_held_type+0x9f/0x120 [ 31.397539] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.398147] ? mtree_range_walk+0x632/0x900 [ 31.398703] ? mas_walk+0x5c7/0x7c0 [ 31.399189] do_vmi_munmap+0x1f1/0x2b0 [ 31.399681] mmap_region+0x1f9/0x2660 [ 31.400177] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.400688] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.401414] ? __pfx_lock_acquire+0x10/0x10 [ 31.401956] ? __pfx_mmap_region+0x10/0x10 [ 31.402492] ? security_mmap_addr+0x7d/0xa0 [ 31.403036] ? get_unmapped_area+0x1f5/0x3f0 [ 31.403592] do_mmap+0x854/0xf00 [ 31.404035] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.404540] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.405121] ksys_mmap_pgoff+0x3af/0x500 [ 31.405639] do_syscall_64+0x3f/0x90 [ 31.406122] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.406772] RIP: 0033:0x7f814bdf6d82 [ 31.407229] 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 [ 31.409372] RSP: 002b:00007ffc8d9ad758 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.410279] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f814bdf6d82 [ 31.411125] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f814b230000 [ 31.411972] RBP: 00007f814b230000 R08: 0000000000000009 R09: 0000000000001000 [ 31.412824] R10: 0000000000000812 R11: 0000000000000206 R12: 00005652cdea0ec0 [ 31.413676] R13: 00007ffc8d9ad770 R14: 00007ffc8d9ad7a0 R15: 00007ffc8d9adb00 [ 31.414536] [ 31.414845] [ 31.415065] Allocated by task 213: [ 31.415499] kasan_save_stack+0x22/0x50 [ 31.416012] kasan_set_track+0x25/0x30 [ 31.416510] __kasan_slab_alloc+0x59/0x70 [ 31.417032] kmem_cache_alloc+0x16b/0x370 [ 31.417562] vm_area_dup+0x20/0x160 [ 31.418025] __split_vma+0x170/0x950 [ 31.418496] split_vma+0xc6/0x110 [ 31.418943] mprotect_fixup+0x8d2/0xb30 [ 31.419444] do_mprotect_pkey+0x87e/0xd40 [ 31.419972] __x64_sys_mprotect+0x78/0xc0 [ 31.420496] do_syscall_64+0x3f/0x90 [ 31.420979] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.421630] [ 31.421851] Freed by task 13: [ 31.422240] kasan_save_stack+0x22/0x50 [ 31.422744] kasan_set_track+0x25/0x30 [ 31.423233] kasan_save_free_info+0x2b/0x50 [ 31.423768] __kasan_slab_free+0x10a/0x190 [ 31.424298] kmem_cache_free+0x10d/0x4d0 [ 31.424807] rcu_core+0x8c8/0x2860 [ 31.425263] __do_softirq+0x1b7/0x7d4 [ 31.425746] [ 31.425962] Last potentially related work creation: [ 31.426563] kasan_save_stack+0x22/0x50 [ 31.427069] __kasan_record_aux_stack+0x8e/0xa0 [ 31.427649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.428300] remove_vma+0x139/0x170 [ 31.428753] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.429335] do_vmi_munmap+0x1f1/0x2b0 [ 31.429816] __vm_munmap+0x138/0x3a0 [ 31.430297] __x64_sys_munmap+0x59/0x80 [ 31.430803] do_syscall_64+0x3f/0x90 [ 31.431304] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.431946] [ 31.432164] The buggy address belongs to the object at ffff888019d911d0 [ 31.432164] which belongs to the cache vm_area_struct of size 168 [ 31.433616] The buggy address is located 88 bytes inside of [ 31.433616] freed 168-byte region [ffff888019d911d0, ffff888019d91278) [ 31.435022] [ 31.435231] The buggy address belongs to the physical page: [ 31.435878] page:00000000c077e18c refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x19d91 [ 31.436954] memcg:ffff88800ff55b01 [ 31.437385] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 31.438075] page_type: 0xffffffff() [ 31.438523] raw: 0100000000000200 ffff88800879fc80 ffffea000038bd00 dead000000000003 [ 31.439422] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ff55b01 [ 31.440307] page dumped because: kasan: bad access detected [ 31.440958] [ 31.441184] Memory state around the buggy address: [ 31.441751] ffff888019d91100: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 31.442590] ffff888019d91180: 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb fb [ 31.443434] >ffff888019d91200: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fc [ 31.444269] ^ [ 31.444815] ffff888019d91280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.445665] ffff888019d91300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.446509] ================================================================== [ 31.447637] Disabling lock debugging due to kernel taint [ 33.765251] BUG: Bad rss-counter state mm:000000005806c297 type:MM_FILEPAGES val:33 [ 33.766433] BUG: Bad rss-counter state mm:000000005806c297 type:MM_ANONPAGES val:22 [ 34.134719] BUG: Bad rss-counter state mm:00000000597a2f20 type:MM_FILEPAGES val:33 [ 34.135718] BUG: Bad rss-counter state mm:00000000597a2f20 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:56804' (ECDSA) to the list of known hosts. 2023/06/19 19:43:48 fuzzer started 2023/06/19 19:43:49 dialing manager at localhost:44161 2023/06/19 19:43:49 checking machine... 2023/06/19 19:43:49 checking revisions... [ 34.813107] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:43:49 testing simple program... [ 34.889252] cgroup: Unknown subsys name 'net' [ 34.994502] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:43:41 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=1ffff110033b7f16 RCX=ffffffff837441e6 RDX=0000000000000000 RSI=0000000000000002 RDI=0000000000000002 RBP=ffff888015e5b000 RSP=ffff888019dbf888 R8 =0000000000000005 R9 =0000000000000010 R10=0000000000000014 R11=00000000000b6996 R12=0000000000000006 R13=ffff88801a06ab58 R14=ffff88801a06ab40 R15=0000000000000002 RIP=ffffffff814c0388 RFL=00000202 [-------] 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 00007f97aca52900 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=00007f97ad009618 CR3=000000000ea1e000 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=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 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=00007f16d2790c50 CR3=000000000c6de000 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=b936ba0c0094c992a04f1b3f0fb4483c XMM02=2c67c8bc2e329bc300000000001204d0 XMM03=fb795ef6d65770560000000000124178 XMM04=e38d115677fa943000000000000ae988 XMM05=19e9129bd510f2350000000000133c78 XMM06=2d9a4bee466fa5410000000000132e50 XMM07=e042d86d42eb936e0000000000124450 XMM08=14d73f23f135c66c0000000000120530 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000