[ 23.843118] BUG: Bad rss-counter state mm:00000000128e4c15 type:MM_FILEPAGES val:33 [ 23.844284] BUG: Bad rss-counter state mm:00000000128e4c15 type:MM_ANONPAGES val:22 [ 23.978684] ================================================================== [ 23.979768] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 23.980878] Read of size 8 at addr ffff8880164805c8 by task sshd/220 [ 23.981796] [ 23.982214] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 23.983245] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 23.984404] Call Trace: [ 23.984775] [ 23.985000] dump_stack_lvl+0x91/0xf0 [ 23.985396] print_report+0xcc/0x620 [ 23.985791] ? __virt_addr_valid+0x102/0x340 [ 23.986230] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.986724] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.987203] kasan_report+0xbe/0xf0 [ 23.987584] ? vma_interval_tree_remove+0xc75/0xec0 [ 23.988074] vma_interval_tree_remove+0xc75/0xec0 [ 23.988568] vma_prepare+0xc54/0x11a0 [ 23.988946] __split_vma+0x5af/0x950 [ 23.989331] ? __pfx___split_vma+0x10/0x10 [ 23.989756] ? find_held_lock+0x2c/0x110 [ 23.990188] do_vmi_align_munmap+0x2ba/0x11f0 [ 23.990643] ? lock_is_held_type+0x9f/0x120 [ 23.991069] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 23.991547] ? mtree_range_walk+0x632/0x900 [ 23.991989] ? mas_walk+0x5c7/0x7c0 [ 23.992365] do_vmi_munmap+0x1f1/0x2b0 [ 23.992758] mmap_region+0x1f9/0x2660 [ 23.993142] ? vm_mmap_pgoff+0x15c/0x3a0 [ 23.993548] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 23.994133] ? __pfx_lock_acquire+0x10/0x10 [ 23.994556] ? __pfx_mmap_region+0x10/0x10 [ 23.994980] ? security_mmap_addr+0x7d/0xa0 [ 23.995402] ? get_unmapped_area+0x1f5/0x3f0 [ 23.995843] do_mmap+0x854/0xf00 [ 23.996188] vm_mmap_pgoff+0x1a6/0x3a0 [ 23.996583] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 23.997027] ksys_mmap_pgoff+0x3af/0x500 [ 23.997433] do_syscall_64+0x3f/0x90 [ 23.997828] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 23.998347] RIP: 0033:0x7f8721300d82 [ 23.998711] 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 [ 24.000428] RSP: 002b:00007ffe867bee98 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.001156] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f8721300d82 [ 24.001849] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f872073a000 [ 24.002535] RBP: 00007f872073a000 R08: 0000000000000009 R09: 0000000000001000 [ 24.003216] R10: 0000000000000812 R11: 0000000000000206 R12: 0000557516095ec0 [ 24.003889] R13: 00007ffe867beeb0 R14: 00007ffe867beee0 R15: 00007ffe867bf240 [ 24.004578] [ 24.004815] [ 24.004988] Allocated by task 213: [ 24.005338] kasan_save_stack+0x22/0x50 [ 24.005738] kasan_set_track+0x25/0x30 [ 24.006142] __kasan_slab_alloc+0x59/0x70 [ 24.006566] kmem_cache_alloc+0x16b/0x370 [ 24.006978] vm_area_dup+0x20/0x160 [ 24.007345] __split_vma+0x170/0x950 [ 24.007723] split_vma+0xc6/0x110 [ 24.008075] mprotect_fixup+0x8d2/0xb30 [ 24.008478] do_mprotect_pkey+0x87e/0xd40 [ 24.008900] __x64_sys_mprotect+0x78/0xc0 [ 24.009323] do_syscall_64+0x3f/0x90 [ 24.009710] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.010237] [ 24.010412] Freed by task 213: [ 24.010734] kasan_save_stack+0x22/0x50 [ 24.011140] kasan_set_track+0x25/0x30 [ 24.011537] kasan_save_free_info+0x2b/0x50 [ 24.011962] __kasan_slab_free+0x10a/0x190 [ 24.012389] kmem_cache_free+0x10d/0x4d0 [ 24.012796] rcu_core+0x8c8/0x2860 [ 24.013156] __do_softirq+0x1b7/0x7d4 [ 24.013544] [ 24.013716] Last potentially related work creation: [ 24.014205] kasan_save_stack+0x22/0x50 [ 24.014611] __kasan_record_aux_stack+0x8e/0xa0 [ 24.015070] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.015589] remove_vma+0x139/0x170 [ 24.015949] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.016400] do_vmi_munmap+0x1f1/0x2b0 [ 24.016790] __vm_munmap+0x138/0x3a0 [ 24.017176] __x64_sys_munmap+0x59/0x80 [ 24.017578] do_syscall_64+0x3f/0x90 [ 24.017978] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.018499] [ 24.018670] The buggy address belongs to the object at ffff888016480570 [ 24.018670] which belongs to the cache vm_area_struct of size 168 [ 24.019847] The buggy address is located 88 bytes inside of [ 24.019847] freed 168-byte region [ffff888016480570, ffff888016480618) [ 24.020979] [ 24.021149] The buggy address belongs to the physical page: [ 24.021681] page:0000000051fb16ce refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x16480 [ 24.022582] memcg:ffff888018477b01 [ 24.022926] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.023447] page_type: 0xffffffff() [ 24.023929] raw: 0100000000000200 ffff8880087a0c80 ffffea000065b640 0000000000000002 [ 24.024668] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888018477b01 [ 24.025401] page dumped because: kasan: bad access detected [ 24.025949] [ 24.026120] Memory state around the buggy address: [ 24.026583] ffff888016480480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.027276] ffff888016480500: fb fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb [ 24.027967] >ffff888016480580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.028654] ^ [ 24.029196] ffff888016480600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.029900] ffff888016480680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.030594] ================================================================== [ 24.031337] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.060840] BUG: Bad rss-counter state mm:0000000087844666 type:MM_FILEPAGES val:33 [ 26.062009] BUG: Bad rss-counter state mm:0000000087844666 type:MM_ANONPAGES val:22 [ 26.480354] BUG: Bad rss-counter state mm:00000000ba5d548e type:MM_FILEPAGES val:33 [ 26.481339] BUG: Bad rss-counter state mm:00000000ba5d548e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:51927' (ECDSA) to the list of known hosts. 2023/06/20 20:26:23 fuzzer started 2023/06/20 20:26:23 dialing manager at localhost:36067 2023/06/20 20:26:23 checking machine... 2023/06/20 20:26:23 checking revisions... [ 27.170682] kmemleak: Automatic memory scanning thread ended 2023/06/20 20:26:23 testing simple program... [ 27.216701] cgroup: Unknown subsys name 'net' [ 27.259292] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 20:26:23 Registers: info registers vcpu 0 RAX=ffff888018d3f248 RBX=ffff88800e13c9e8 RCX=1ffff11001c3b4ac RDX=dffffc0000000000 RSI=ffff888018d4a200 RDI=ffff88800e13ca18 RBP=ffff88800e1da530 RSP=ffff88800d0b7cd8 R8 =0000000000000001 R9 =0000000000000246 R10=0000000000000003 R11=00000000000b6a61 R12=ffff888018d49cc0 R13=0000000000000000 R14=ffff88800a3b1c28 R15=ffff88800a3b1be0 RIP=ffffffff81847688 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 00007f4e6460a900 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=00007f4e64bc1618 CR3=0000000016b32000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007f3578ea1cc0 CR3=000000000c6a2000 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=9a8f2dc2eadc719bed4b16b4628e7e8d XMM02=2c67c8bc2e329bc3000000000011fc00 XMM03=fb795ef6d65770560000000000122270 XMM04=1a60b5a6c736244000000000000ae988 XMM05=97b481b1cfd486670000000000132f38 XMM06=4fda316b135da52b0000000000131c68 XMM07=e042d86d42eb936e0000000000122548 XMM08=56a209ec0ef5b46a000000000011fc60 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000