[ 28.581417] BUG: Bad rss-counter state mm:0000000009d55c27 type:MM_FILEPAGES val:33 [ 28.582656] BUG: Bad rss-counter state mm:0000000009d55c27 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 28.716837] ================================================================== [ 28.717910] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 28.719008] Read of size 8 at addr ffff88800fcfc6b0 by task sshd/218 [ 28.720101] [ 28.720362] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 28.721220] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 28.722195] Call Trace: [ 28.722517] [ 28.722797] dump_stack_lvl+0x91/0xf0 [ 28.723308] print_report+0xcc/0x620 [ 28.723790] ? __virt_addr_valid+0x102/0x340 [ 28.724332] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.724948] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.725570] kasan_report+0xbe/0xf0 [ 28.726058] ? vma_interval_tree_remove+0xc75/0xec0 [ 28.726676] vma_interval_tree_remove+0xc75/0xec0 [ 28.727305] vma_prepare+0xc54/0x11a0 [ 28.727779] __split_vma+0x5af/0x950 [ 28.728244] ? __pfx___split_vma+0x10/0x10 [ 28.728777] ? find_held_lock+0x2c/0x110 [ 28.729296] do_vmi_align_munmap+0x2ba/0x11f0 [ 28.729854] ? lock_is_held_type+0x9f/0x120 [ 28.730384] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 28.730983] ? mtree_range_walk+0x632/0x900 [ 28.731553] ? mas_walk+0x5c7/0x7c0 [ 28.732021] do_vmi_munmap+0x1f1/0x2b0 [ 28.732506] mmap_region+0x1f9/0x2660 [ 28.732982] ? vm_mmap_pgoff+0x15c/0x3a0 [ 28.733531] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 28.734420] ? __pfx_lock_acquire+0x10/0x10 [ 28.735036] ? __pfx_mmap_region+0x10/0x10 [ 28.735661] ? security_mmap_addr+0x7d/0xa0 [ 28.736205] ? get_unmapped_area+0x1f5/0x3f0 [ 28.736745] do_mmap+0x854/0xf00 [ 28.737177] vm_mmap_pgoff+0x1a6/0x3a0 [ 28.737663] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 28.738216] ksys_mmap_pgoff+0x3af/0x500 [ 28.738720] do_syscall_64+0x3f/0x90 [ 28.739215] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.739854] RIP: 0033:0x7f23e5923d82 [ 28.740311] 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 [ 28.742402] RSP: 002b:00007fff6a539208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 28.743304] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f23e5923d82 [ 28.744134] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f23e4d5d000 [ 28.744966] RBP: 00007f23e4d5d000 R08: 0000000000000009 R09: 0000000000001000 [ 28.745810] R10: 0000000000000812 R11: 0000000000000206 R12: 000055ae4eacbec0 [ 28.746648] R13: 00007fff6a539220 R14: 00007fff6a539250 R15: 00007fff6a5395b0 [ 28.747508] [ 28.747798] [ 28.748008] Allocated by task 211: [ 28.748433] kasan_save_stack+0x22/0x50 [ 28.748936] kasan_set_track+0x25/0x30 [ 28.749437] __kasan_slab_alloc+0x59/0x70 [ 28.749956] kmem_cache_alloc+0x16b/0x370 [ 28.750475] vm_area_dup+0x20/0x160 [ 28.750922] __split_vma+0x170/0x950 [ 28.751397] split_vma+0xc6/0x110 [ 28.751838] mprotect_fixup+0x8d2/0xb30 [ 28.752334] do_mprotect_pkey+0x87e/0xd40 [ 28.752887] __x64_sys_mprotect+0x78/0xc0 [ 28.753416] do_syscall_64+0x3f/0x90 [ 28.753896] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.754557] [ 28.754781] Freed by task 211: [ 28.755184] kasan_save_stack+0x22/0x50 [ 28.755691] kasan_set_track+0x25/0x30 [ 28.756186] kasan_save_free_info+0x2b/0x50 [ 28.756731] __kasan_slab_free+0x10a/0x190 [ 28.757274] kmem_cache_free+0x10d/0x4d0 [ 28.757797] rcu_core+0x8c8/0x2860 [ 28.758242] __do_softirq+0x1b7/0x7d4 [ 28.758730] [ 28.758955] Last potentially related work creation: [ 28.759559] kasan_save_stack+0x22/0x50 [ 28.760067] __kasan_record_aux_stack+0x8e/0xa0 [ 28.760660] __call_rcu_common.constprop.0+0x6a/0xb90 [ 28.761454] remove_vma+0x139/0x170 [ 28.761931] do_vmi_align_munmap+0xd4a/0x11f0 [ 28.762488] do_vmi_munmap+0x1f1/0x2b0 [ 28.762978] __vm_munmap+0x138/0x3a0 [ 28.763468] __x64_sys_munmap+0x59/0x80 [ 28.763965] do_syscall_64+0x3f/0x90 [ 28.764439] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 28.765078] [ 28.765297] The buggy address belongs to the object at ffff88800fcfc658 [ 28.765297] which belongs to the cache vm_area_struct of size 168 [ 28.766784] The buggy address is located 88 bytes inside of [ 28.766784] freed 168-byte region [ffff88800fcfc658, ffff88800fcfc700) [ 28.768200] [ 28.768423] The buggy address belongs to the physical page: [ 28.769098] page:00000000a4b54815 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xfcfc [ 28.770208] memcg:ffff888013df2601 [ 28.770634] flags: 0x100000000000200(slab|node=0|zone=1) [ 28.771309] page_type: 0xffffffff() [ 28.771767] raw: 0100000000000200 ffff88800879fc80 dead000000000100 dead000000000122 [ 28.772697] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013df2601 [ 28.773633] page dumped because: kasan: bad access detected [ 28.774304] [ 28.774524] Memory state around the buggy address: [ 28.775115] ffff88800fcfc580: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 28.775989] ffff88800fcfc600: 00 00 00 fc fc fc fc fc fc fc fc fa fb fb fb fb [ 28.776860] >ffff88800fcfc680: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 28.777735] ^ [ 28.778323] ffff88800fcfc700: fc fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 [ 28.779197] ffff88800fcfc780: 00 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc [ 28.780054] ================================================================== [ 28.780982] Disabling lock debugging due to kernel taint [ 31.254416] BUG: Bad rss-counter state mm:0000000064f14687 type:MM_FILEPAGES val:33 [ 31.255649] BUG: Bad rss-counter state mm:0000000064f14687 type:MM_ANONPAGES val:22 [ 31.700651] BUG: Bad rss-counter state mm:00000000b6c43df9 type:MM_FILEPAGES val:33 [ 31.701822] BUG: Bad rss-counter state mm:00000000b6c43df9 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:31466' (ECDSA) to the list of known hosts. 2023/06/19 19:58:20 fuzzer started 2023/06/19 19:58:20 dialing manager at localhost:44161 2023/06/19 19:58:20 checking machine... 2023/06/19 19:58:20 checking revisions... [ 32.471743] kmemleak: Automatic memory scanning thread ended 2023/06/19 19:58:20 testing simple program... [ 32.518911] cgroup: Unknown subsys name 'net' [ 32.582517] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 19:58:15 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=0000000000000255 RCX=0000000000000000 RDX=ffff888015cad1c0 RSI=ffffffff8113b7aa RDI=0000000000000005 RBP=ffff888016ba7f58 RSP=ffff888016ba7ed0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=0000000000000000 R12=0000000000000007 R13=00007fd3a3b2e31c R14=0000000000000000 R15=ffff88801791ef00 RIP=ffffffff814c081b 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007fd3a3791900 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=00007fd3a3b2e31c CR3=0000000017bd2000 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=6720646572637465733a4d41503d706f XMM01=652022746f6f72223d74636361207469 XMM02=3d6c616e696d72657420322e322e302e XMM03=3d656d616e74736f682022646873732f XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=652075253d64692073253d706f000000 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000000 RBX=ffffea000071bbc0 RCX=ffffffff816513bc RDX=ffff888008d49b40 RSI=0000000000000000 RDI=0000000000000001 RBP=0000000000000000 RSP=ffff888008d5f080 R8 =0000000000000001 R9 =0000000000000000 R10=0000000000000000 R11=0000000000009293 R12=1ffff110011abe17 R13=0000000000000a00 R14=0000000000000000 R15=0000000000000001 RIP=ffffffff814c0245 RFL=00000093 [--S-A-C] 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=00007fd3a3726000 CR3=0000000017bd2000 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=f38cf14141b186cc41997132be748416 XMM02=3cb3c7457c5ef86eef343307a4b19f7a XMM03=9c99fc4be42ec9ce8c365e606ab01815 XMM04=b28a1b9b910977f8270dcd492e4aea7f XMM05=7219a95634f84741bf0cdd6eeaab6e05 XMM06=eb28a6517f5935483be52be6a48d63f4 XMM07=c56abe441fc61f1f9c20395018c8518b XMM08=12aae608dec0b4022d613b2bda3561ad XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000