[ 24.247801] BUG: Bad rss-counter state mm:00000000868f80c9 type:MM_FILEPAGES val:33 [ 24.249009] BUG: Bad rss-counter state mm:00000000868f80c9 type:MM_ANONPAGES val:22 [ 24.285193] ================================================================== [ 24.286191] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.287267] Read of size 8 at addr ffff8880147ff880 by task sshd/219 [ 24.288121] [ 24.288373] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.289501] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.290499] Call Trace: [ 24.290827] [ 24.291144] dump_stack_lvl+0x91/0xf0 [ 24.291649] print_report+0xcc/0x620 [ 24.292148] ? __virt_addr_valid+0x102/0x340 [ 24.292722] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.293357] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.293985] kasan_report+0xbe/0xf0 [ 24.294480] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.295132] vma_interval_tree_remove+0xc75/0xec0 [ 24.295751] vma_prepare+0xc54/0x11a0 [ 24.296345] __split_vma+0x5af/0x950 [ 24.296845] ? __pfx___split_vma+0x10/0x10 [ 24.297374] ? find_held_lock+0x2c/0x110 [ 24.297916] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.298512] ? lock_is_held_type+0x9f/0x120 [ 24.299100] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.299733] ? mtree_range_walk+0x632/0x900 [ 24.300305] ? mas_walk+0x5c7/0x7c0 [ 24.300805] do_vmi_munmap+0x1f1/0x2b0 [ 24.301317] mmap_region+0x1f9/0x2660 [ 24.301818] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.302348] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.303099] ? __pfx_lock_acquire+0x10/0x10 [ 24.303645] ? __pfx_mmap_region+0x10/0x10 [ 24.304204] ? security_mmap_addr+0x7d/0xa0 [ 24.304763] ? get_unmapped_area+0x1f5/0x3f0 [ 24.305335] do_mmap+0x854/0xf00 [ 24.305786] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.306305] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.306881] ksys_mmap_pgoff+0x3af/0x500 [ 24.307437] do_syscall_64+0x3f/0x90 [ 24.307940] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.308618] RIP: 0033:0x7f46f513fd82 [ 24.309083] 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 [ 24.311287] RSP: 002b:00007ffdf3760128 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.312215] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f46f513fd82 [ 24.313084] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f46f4579000 [ 24.313946] RBP: 00007f46f4579000 R08: 0000000000000009 R09: 0000000000001000 [ 24.314836] R10: 0000000000000812 R11: 0000000000000206 R12: 0000562f84659ec0 [ 24.315721] R13: 00007ffdf3760140 R14: 00007ffdf3760170 R15: 00007ffdf37604d0 [ 24.316635] [ 24.316926] [ 24.317151] Allocated by task 212: [ 24.317602] kasan_save_stack+0x22/0x50 [ 24.318120] kasan_set_track+0x25/0x30 [ 24.318634] __kasan_slab_alloc+0x59/0x70 [ 24.319197] kmem_cache_alloc+0x16b/0x370 [ 24.319743] vm_area_dup+0x20/0x160 [ 24.320211] __split_vma+0x170/0x950 [ 24.320699] split_vma+0xc6/0x110 [ 24.321197] mprotect_fixup+0x8d2/0xb30 [ 24.321729] do_mprotect_pkey+0x87e/0xd40 [ 24.322271] __x64_sys_mprotect+0x78/0xc0 [ 24.322804] do_syscall_64+0x3f/0x90 [ 24.323309] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.323994] [ 24.324221] Freed by task 212: [ 24.324627] kasan_save_stack+0x22/0x50 [ 24.325150] kasan_set_track+0x25/0x30 [ 24.325657] kasan_save_free_info+0x2b/0x50 [ 24.326208] __kasan_slab_free+0x10a/0x190 [ 24.326760] kmem_cache_free+0x10d/0x4d0 [ 24.327307] rcu_core+0x8c8/0x2860 [ 24.327771] __do_softirq+0x1b7/0x7d4 [ 24.328268] [ 24.328497] Last potentially related work creation: [ 24.329102] kasan_save_stack+0x22/0x50 [ 24.329613] __kasan_record_aux_stack+0x8e/0xa0 [ 24.330220] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.330892] remove_vma+0x139/0x170 [ 24.331382] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.331951] do_vmi_munmap+0x1f1/0x2b0 [ 24.332470] __vm_munmap+0x138/0x3a0 [ 24.332946] __x64_sys_munmap+0x59/0x80 [ 24.333475] do_syscall_64+0x3f/0x90 [ 24.333966] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.334639] [ 24.334858] The buggy address belongs to the object at ffff8880147ff828 [ 24.334858] which belongs to the cache vm_area_struct of size 168 [ 24.336397] The buggy address is located 88 bytes inside of [ 24.336397] freed 168-byte region [ffff8880147ff828, ffff8880147ff8d0) [ 24.337867] [ 24.338094] The buggy address belongs to the physical page: [ 24.338776] page:000000001bb6b233 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x147ff [ 24.339915] memcg:ffff88800e3c4f01 [ 24.340349] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.341022] page_type: 0xffffffff() [ 24.341478] raw: 0100000000000200 ffff8880087a0c80 ffffea0000363b80 dead000000000008 [ 24.342413] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e3c4f01 [ 24.343353] page dumped because: kasan: bad access detected [ 24.344054] [ 24.344278] Memory state around the buggy address: [ 24.344891] ffff8880147ff780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 24.345768] ffff8880147ff800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 24.346650] >ffff8880147ff880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 24.347542] ^ [ 24.347971] ffff8880147ff900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.348857] ffff8880147ff980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 24.349728] ================================================================== [ 24.351026] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.953245] BUG: Bad rss-counter state mm:00000000039a9bab type:MM_FILEPAGES val:33 [ 25.953961] BUG: Bad rss-counter state mm:00000000039a9bab type:MM_ANONPAGES val:22 [ 26.371143] BUG: Bad rss-counter state mm:000000004dbab3b7 type:MM_FILEPAGES val:33 [ 26.371875] BUG: Bad rss-counter state mm:000000004dbab3b7 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:14045' (ECDSA) to the list of known hosts. 2023/06/20 16:16:46 fuzzer started 2023/06/20 16:16:47 dialing manager at localhost:36067 2023/06/20 16:16:47 checking machine... 2023/06/20 16:16:47 checking revisions... [ 27.009819] kmemleak: Automatic memory scanning thread ended 2023/06/20 16:16:47 testing simple program... [ 27.050807] cgroup: Unknown subsys name 'net' [ 27.088610] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 16:16:46 Registers: info registers vcpu 0 RAX=00000000a8c548c3 RBX=0000000095d1d9bd RCX=ffff888016d9f2ac RDX=0000000000000014 RSI=0000000000000001 RDI=00000000fc6f8cbc RBP=ffff88800844f780 RSP=ffff888016d9f1a8 R8 =0000000090faed0c R9 =fffffbfff0ba7a6a R10=ffffffff85d3d357 R11=00000000000b6a61 R12=0000000000000001 R13=0000000000092cc0 R14=ffff888016d9f210 R15=0000000000000014 RIP=ffffffff8227048a RFL=00000a86 [-OS--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 00007ff2cab33900 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=00007ff2cb0ea618 CR3=000000000f722000 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=00007f4719548fc0 CR3=000000000d800000 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=3d6b401a89a03687e5425fa208d89abc XMM02=000000000011a8a8eff9b2d0a8fce9cb XMM03=000000000011a9782c67c8bc2e329bc3 XMM04=1fe7c9a73e35d16100000000000ae988 XMM05=dfcdbad4f1609c370000000000130e50 XMM06=3907dc6751081d0e0000000000130028 XMM07=e042d86d42eb936e00000000001215e0 XMM08=078e0079ac6bbaeb000000000011a978 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000