[ 30.047928] BUG: Bad rss-counter state mm:0000000046b3fe16 type:MM_FILEPAGES val:33 [ 30.049234] BUG: Bad rss-counter state mm:0000000046b3fe16 type:MM_ANONPAGES val:22 [ 30.086507] ================================================================== [ 30.087438] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.088365] Read of size 8 at addr ffff88800e980880 by task sshd/219 [ 30.089220] [ 30.089434] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 30.090291] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.091283] Call Trace: [ 30.091600] [ 30.091884] dump_stack_lvl+0x91/0xf0 [ 30.092395] print_report+0xcc/0x620 [ 30.092875] ? __virt_addr_valid+0x102/0x340 [ 30.093420] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.094045] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.094645] kasan_report+0xbe/0xf0 [ 30.095090] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.095674] vma_interval_tree_remove+0xc75/0xec0 [ 30.096278] vma_prepare+0xc54/0x11a0 [ 30.096747] __split_vma+0x5af/0x950 [ 30.097220] ? __pfx___split_vma+0x10/0x10 [ 30.097748] ? find_held_lock+0x2c/0x110 [ 30.098273] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.098838] ? lock_is_held_type+0x9f/0x120 [ 30.099374] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.099991] ? mtree_range_walk+0x632/0x900 [ 30.100535] ? mas_walk+0x5c7/0x7c0 [ 30.101004] do_vmi_munmap+0x1f1/0x2b0 [ 30.101481] mmap_region+0x1f9/0x2660 [ 30.101963] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.102457] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.103174] ? __pfx_lock_acquire+0x10/0x10 [ 30.103696] ? __pfx_mmap_region+0x10/0x10 [ 30.104237] ? security_mmap_addr+0x7d/0xa0 [ 30.104758] ? get_unmapped_area+0x1f5/0x3f0 [ 30.105307] do_mmap+0x854/0xf00 [ 30.105739] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.106235] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.106782] ksys_mmap_pgoff+0x3af/0x500 [ 30.107291] do_syscall_64+0x3f/0x90 [ 30.107782] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.108442] RIP: 0033:0x7fea933bbd82 [ 30.108894] 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 [ 30.111009] RSP: 002b:00007ffddefb5ae8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.111891] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fea933bbd82 [ 30.112733] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fea927f5000 [ 30.113607] RBP: 00007fea927f5000 R08: 0000000000000009 R09: 0000000000001000 [ 30.114448] R10: 0000000000000812 R11: 0000000000000206 R12: 0000558a4dbd1ec0 [ 30.115313] R13: 00007ffddefb5b00 R14: 00007ffddefb5b30 R15: 00007ffddefb5e90 [ 30.116204] [ 30.116497] [ 30.116711] Allocated by task 212: [ 30.117136] kasan_save_stack+0x22/0x50 [ 30.117640] kasan_set_track+0x25/0x30 [ 30.118134] __kasan_slab_alloc+0x59/0x70 [ 30.118653] kmem_cache_alloc+0x16b/0x370 [ 30.119178] vm_area_dup+0x20/0x160 [ 30.119634] __split_vma+0x170/0x950 [ 30.120104] split_vma+0xc6/0x110 [ 30.120540] mprotect_fixup+0x8d2/0xb30 [ 30.121042] do_mprotect_pkey+0x87e/0xd40 [ 30.121563] __x64_sys_mprotect+0x78/0xc0 [ 30.122080] do_syscall_64+0x3f/0x90 [ 30.122551] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.123198] [ 30.123416] Freed by task 212: [ 30.123828] kasan_save_stack+0x22/0x50 [ 30.124337] kasan_set_track+0x25/0x30 [ 30.124832] kasan_save_free_info+0x2b/0x50 [ 30.125366] __kasan_slab_free+0x10a/0x190 [ 30.125904] kmem_cache_free+0x10d/0x4d0 [ 30.126413] rcu_core+0x8c8/0x2860 [ 30.126855] __do_softirq+0x1b7/0x7d4 [ 30.127340] [ 30.127555] Last potentially related work creation: [ 30.128155] kasan_save_stack+0x22/0x50 [ 30.128657] __kasan_record_aux_stack+0x8e/0xa0 [ 30.129225] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.129866] remove_vma+0x139/0x170 [ 30.130319] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.130877] do_vmi_munmap+0x1f1/0x2b0 [ 30.131364] __vm_munmap+0x138/0x3a0 [ 30.131851] __x64_sys_munmap+0x59/0x80 [ 30.132355] do_syscall_64+0x3f/0x90 [ 30.132836] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.133482] [ 30.133695] The buggy address belongs to the object at ffff88800e980828 [ 30.133695] which belongs to the cache vm_area_struct of size 168 [ 30.135166] The buggy address is located 88 bytes inside of [ 30.135166] freed 168-byte region [ffff88800e980828, ffff88800e9808d0) [ 30.136565] [ 30.136779] The buggy address belongs to the physical page: [ 30.137442] page:000000001b1f5c75 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe980 [ 30.138518] memcg:ffff88800e9fa701 [ 30.138945] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 30.139643] page_type: 0xffffffff() [ 30.140097] raw: 0100000000000200 ffff8880087a0c80 ffffea0000365300 dead000000000007 [ 30.141045] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800e9fa701 [ 30.141979] page dumped because: kasan: bad access detected [ 30.142642] [ 30.142861] Memory state around the buggy address: [ 30.143445] ffff88800e980780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 30.144328] ffff88800e980800: fc fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb [ 30.145193] >ffff88800e980880: fb fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc [ 30.146043] ^ [ 30.146452] ffff88800e980900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.147302] ffff88800e980980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 30.148167] ================================================================== [ 30.149307] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 32.219464] BUG: Bad rss-counter state mm:000000001c26d70e type:MM_FILEPAGES val:33 [ 32.220577] BUG: Bad rss-counter state mm:000000001c26d70e type:MM_ANONPAGES val:22 [ 32.680704] BUG: Bad rss-counter state mm:000000000af1c734 type:MM_FILEPAGES val:33 [ 32.682046] BUG: Bad rss-counter state mm:000000000af1c734 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28147' (ECDSA) to the list of known hosts. 2023/06/20 21:57:30 fuzzer started 2023/06/20 21:57:30 dialing manager at localhost:36067 2023/06/20 21:57:30 checking machine... 2023/06/20 21:57:30 checking revisions... [ 33.419534] kmemleak: Automatic memory scanning thread ended 2023/06/20 21:57:30 testing simple program... [ 33.471625] cgroup: Unknown subsys name 'net' [ 33.512560] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 21:57:30 Registers: info registers vcpu 0 RAX=ffffffff8614dcd6 RBX=0000000000000001 RCX=ffffffff818dae7a RDX=0000000000000000 RSI=ffffffff8614dcd6 RDI=ffffffff85e0bef8 RBP=ffff888014397500 RSP=ffff888014397420 R8 =ffffffff8614dcd6 R9 =ffff8880143974e8 R10=0000000000038001 R11=000000000002454d R12=ffff888014397508 R13=ffff8880143974f0 R14=0000000000000000 R15=dffffc0000000000 RIP=ffffffff8112fcbd RFL=00000286 [--S--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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f314e7eb900 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=00007f314dc44e40 CR3=00000000101a2000 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=656e6e6f637369443d4547415353454d XMM01=2e303120746f6f722072657375206d6f XMM02=ffffffffffffffffffffffffffffffff XMM03=2f6c616e72756f6a2f676f6c2f6e7572 XMM04=f2c966af4096810600000000000ae988 XMM05=3ea3e65d741276e40000000000131fe0 XMM06=dfcdbad4f1609c370000000000130db8 XMM07=00000000000000000000000000000000 XMM08=415453454d49545f454d49544c414552 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffff88800b9eea4c RBX=dffffc0000000000 RCX=0000000000000004 RDX=0000000000000000 RSI=0000000000000010 RDI=ffff88800b9eea4c RBP=ffff88800b9eea5c RSP=ffff8880166973a8 R8 =0000000000000001 R9 =0000000000000000 R10=000000000000006c R11=00000000000b6a61 R12=ffff88800b9eea4c R13=00000000ffffffff R14=00000000ffffffff R15=000000000000006c RIP=ffffffff844d9313 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 00007f2b54493900 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=00007f2b54a4a618 CR3=000000000e8c8000 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