[ 30.530981] BUG: Bad rss-counter state mm:00000000e2fa6918 type:MM_FILEPAGES val:33 [ 30.531993] BUG: Bad rss-counter state mm:00000000e2fa6918 type:MM_ANONPAGES val:22 [ 30.698897] ================================================================== [ 30.699864] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 30.700969] Read of size 8 at addr ffff88800e92a5c8 by task sshd/219 [ 30.701807] [ 30.702045] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 30.702970] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 30.704020] Call Trace: [ 30.704366] [ 30.704676] dump_stack_lvl+0x91/0xf0 [ 30.705203] print_report+0xcc/0x620 [ 30.705739] ? __virt_addr_valid+0x102/0x340 [ 30.706337] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707011] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.707679] kasan_report+0xbe/0xf0 [ 30.708201] ? vma_interval_tree_remove+0xc75/0xec0 [ 30.708880] vma_interval_tree_remove+0xc75/0xec0 [ 30.709544] vma_prepare+0xc54/0x11a0 [ 30.710100] __split_vma+0x5af/0x950 [ 30.710619] ? __pfx___split_vma+0x10/0x10 [ 30.711209] ? find_held_lock+0x2c/0x110 [ 30.711785] do_vmi_align_munmap+0x2ba/0x11f0 [ 30.712410] ? lock_is_held_type+0x9f/0x120 [ 30.713003] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 30.713681] ? mtree_range_walk+0x632/0x900 [ 30.714292] ? mas_walk+0x5c7/0x7c0 [ 30.714813] do_vmi_munmap+0x1f1/0x2b0 [ 30.715361] mmap_region+0x1f9/0x2660 [ 30.715904] ? vm_mmap_pgoff+0x15c/0x3a0 [ 30.716480] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 30.717286] ? __pfx_lock_acquire+0x10/0x10 [ 30.717897] ? __pfx_mmap_region+0x10/0x10 [ 30.718490] ? security_mmap_addr+0x7d/0xa0 [ 30.719087] ? get_unmapped_area+0x1f5/0x3f0 [ 30.719706] do_mmap+0x854/0xf00 [ 30.720197] vm_mmap_pgoff+0x1a6/0x3a0 [ 30.720756] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 30.721392] ksys_mmap_pgoff+0x3af/0x500 [ 30.721985] do_syscall_64+0x3f/0x90 [ 30.722530] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.723272] RIP: 0033:0x7f6d2a198d82 [ 30.723795] 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 [ 30.726240] RSP: 002b:00007fff343cce68 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 30.727284] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f6d2a198d82 [ 30.728261] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f6d295d2000 [ 30.729218] RBP: 00007f6d295d2000 R08: 0000000000000009 R09: 0000000000001000 [ 30.730155] R10: 0000000000000812 R11: 0000000000000206 R12: 0000556d38725ec0 [ 30.731084] R13: 00007fff343cce80 R14: 00007fff343cceb0 R15: 00007fff343cd210 [ 30.732028] [ 30.732352] [ 30.732591] Allocated by task 209: [ 30.733062] kasan_save_stack+0x22/0x50 [ 30.733621] kasan_set_track+0x25/0x30 [ 30.734202] __kasan_slab_alloc+0x59/0x70 [ 30.734798] kmem_cache_alloc+0x16b/0x370 [ 30.735372] vm_area_dup+0x20/0x160 [ 30.735880] __split_vma+0x170/0x950 [ 30.736401] split_vma+0xc6/0x110 [ 30.736884] mprotect_fixup+0x8d2/0xb30 [ 30.737443] do_mprotect_pkey+0x87e/0xd40 [ 30.738034] __x64_sys_mprotect+0x78/0xc0 [ 30.738616] do_syscall_64+0x3f/0x90 [ 30.739149] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.739875] [ 30.740121] Freed by task 209: [ 30.740567] kasan_save_stack+0x22/0x50 [ 30.741132] kasan_set_track+0x25/0x30 [ 30.741698] kasan_save_free_info+0x2b/0x50 [ 30.742300] __kasan_slab_free+0x10a/0x190 [ 30.742904] kmem_cache_free+0x10d/0x4d0 [ 30.743466] rcu_core+0x8c8/0x2860 [ 30.743973] __do_softirq+0x1b7/0x7d4 [ 30.744511] [ 30.744751] Last potentially related work creation: [ 30.745412] kasan_save_stack+0x22/0x50 [ 30.745995] __kasan_record_aux_stack+0x8e/0xa0 [ 30.746635] __call_rcu_common.constprop.0+0x6a/0xb90 [ 30.747358] remove_vma+0x139/0x170 [ 30.747861] do_vmi_align_munmap+0xd4a/0x11f0 [ 30.748488] do_vmi_munmap+0x1f1/0x2b0 [ 30.749030] __vm_munmap+0x138/0x3a0 [ 30.749550] __x64_sys_munmap+0x59/0x80 [ 30.750112] do_syscall_64+0x3f/0x90 [ 30.750639] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 30.751363] [ 30.751604] The buggy address belongs to the object at ffff88800e92a570 [ 30.751604] which belongs to the cache vm_area_struct of size 168 [ 30.753339] The buggy address is located 88 bytes inside of [ 30.753339] freed 168-byte region [ffff88800e92a570, ffff88800e92a618) [ 30.755027] [ 30.755283] The buggy address belongs to the physical page: [ 30.756064] page:00000000799fabe3 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe92a [ 30.757367] memcg:ffff888019f76f01 [ 30.757887] flags: 0x100000000000200(slab|node=0|zone=1) [ 30.758665] page_type: 0xffffffff() [ 30.759223] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 30.760347] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888019f76f01 [ 30.761479] page dumped because: kasan: bad access detected [ 30.762349] [ 30.762623] Memory state around the buggy address: [ 30.763366] ffff88800e92a480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 30.764486] ffff88800e92a500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 30.765591] >ffff88800e92a580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.766678] ^ [ 30.767542] ffff88800e92a600: fb fb fb fc fc fc fc fc fc fc fc fa fb fb fb fb [ 30.768665] ffff88800e92a680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 30.769793] ================================================================== [ 30.771085] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 33.416227] BUG: Bad rss-counter state mm:00000000b3ae359c type:MM_FILEPAGES val:33 [ 33.417368] BUG: Bad rss-counter state mm:00000000b3ae359c type:MM_ANONPAGES val:22 [ 33.871203] BUG: Bad rss-counter state mm:0000000030a362eb type:MM_FILEPAGES val:33 [ 33.872237] BUG: Bad rss-counter state mm:0000000030a362eb type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:57393' (ECDSA) to the list of known hosts. 2023/06/19 18:01:32 fuzzer started 2023/06/19 18:01:32 dialing manager at localhost:44161 2023/06/19 18:01:32 checking machine... 2023/06/19 18:01:32 checking revisions... [ 34.613451] kmemleak: Automatic memory scanning thread ended 2023/06/19 18:01:33 testing simple program... [ 34.656504] cgroup: Unknown subsys name 'net' [ 34.695991] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:01:26 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015b85340 RCX=0000000000000000 RDX=1ffff1100d9c73df RSI=0000000000000008 RDI=ffff88806ce39ef8 RBP=ffff888008d87c38 RSP=ffff888008d87b08 R8 =ffff888008d71fe8 R9 =ffffed1002b70b2c R10=ffff888015b85967 R11=0000000000000000 R12=ffff88806ce39500 R13=ffff888008d71b40 R14=ffff88800e299fe8 R15=ffff88800e299b40 RIP=ffffffff84518382 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 0000000000000000 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=00007f92f217d618 CR3=000000000ec50000 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=0000000000000007 RBX=0000000000000001 RCX=ffffffff816ab195 RDX=0000000000006ab1 RSI=0000000000006ab1 RDI=ffffffff86502684 RBP=ffff8880199b7800 RSP=ffff8880199b7738 R8 =0000000000000000 R9 =ffff8880199b77e8 R10=0000000000038001 R11=000000000001e4d0 R12=ffff8880199b7808 R13=ffff8880199b77f0 R14=ffff8880199b77e9 R15=ffff8880199b77a8 RIP=ffffffff8113078b RFL=00000246 [---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 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=00007fa5e5c42028 CR3=000000001bff0000 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=756e696c2d34365f3638782f62696c2f XMM01=00312e6f732e7a62696c2f756e672d78 XMM02=ffffffffffffffffffffffffffffffff XMM03=ffffffffffffffffffffffffffffffff XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000 XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000