[ 23.864167] BUG: Bad rss-counter state mm:00000000b1ce6f85 type:MM_FILEPAGES val:33 [ 23.865354] BUG: Bad rss-counter state mm:00000000b1ce6f85 type:MM_ANONPAGES val:22 [ 24.026481] ================================================================== [ 24.027380] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.028315] Read of size 8 at addr ffff88800e2b03f8 by task sshd/219 [ 24.029079] [ 24.029294] CPU: 0 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 24.030223] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.031180] Call Trace: [ 24.031496] [ 24.031817] dump_stack_lvl+0x91/0xf0 [ 24.032314] print_report+0xcc/0x620 [ 24.032787] ? __virt_addr_valid+0x102/0x340 [ 24.033334] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.033952] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.034557] kasan_report+0xbe/0xf0 [ 24.035029] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.035645] vma_interval_tree_remove+0xc75/0xec0 [ 24.036250] vma_prepare+0xc54/0x11a0 [ 24.036725] __split_vma+0x5af/0x950 [ 24.037196] ? __pfx___split_vma+0x10/0x10 [ 24.037725] ? find_held_lock+0x2c/0x110 [ 24.038251] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.038815] ? lock_is_held_type+0x9f/0x120 [ 24.039359] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.039989] ? mtree_range_walk+0x632/0x900 [ 24.040545] ? mas_walk+0x5c7/0x7c0 [ 24.041037] do_vmi_munmap+0x1f1/0x2b0 [ 24.041530] mmap_region+0x1f9/0x2660 [ 24.042019] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.042527] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.043235] ? __pfx_lock_acquire+0x10/0x10 [ 24.043771] ? __pfx_mmap_region+0x10/0x10 [ 24.044310] ? security_mmap_addr+0x7d/0xa0 [ 24.044845] ? get_unmapped_area+0x1f5/0x3f0 [ 24.045394] do_mmap+0x854/0xf00 [ 24.045838] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.046333] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.046891] ksys_mmap_pgoff+0x3af/0x500 [ 24.047397] do_syscall_64+0x3f/0x90 [ 24.047889] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.048536] RIP: 0033:0x7f7f7e7aad82 [ 24.048989] 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 [ 24.051094] RSP: 002b:00007fffd9ec0208 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.052004] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f7f7e7aad82 [ 24.052865] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f7f7dbe4000 [ 24.053704] RBP: 00007f7f7dbe4000 R08: 0000000000000009 R09: 0000000000001000 [ 24.054539] R10: 0000000000000812 R11: 0000000000000206 R12: 00005606c7838980 [ 24.055373] R13: 00007fffd9ec0220 R14: 00007fffd9ec0250 R15: 00007fffd9ec05b0 [ 24.056246] [ 24.056539] [ 24.056758] Allocated by task 212: [ 24.057179] kasan_save_stack+0x22/0x50 [ 24.057683] kasan_set_track+0x25/0x30 [ 24.058175] __kasan_slab_alloc+0x59/0x70 [ 24.058698] kmem_cache_alloc+0x16b/0x370 [ 24.059211] vm_area_dup+0x20/0x160 [ 24.059668] __split_vma+0x170/0x950 [ 24.060141] split_vma+0xc6/0x110 [ 24.060577] mprotect_fixup+0x8d2/0xb30 [ 24.061079] do_mprotect_pkey+0x87e/0xd40 [ 24.061601] __x64_sys_mprotect+0x78/0xc0 [ 24.062121] do_syscall_64+0x3f/0x90 [ 24.062591] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.063226] [ 24.063443] Freed by task 212: [ 24.063828] kasan_save_stack+0x22/0x50 [ 24.064356] kasan_set_track+0x25/0x30 [ 24.064853] kasan_save_free_info+0x2b/0x50 [ 24.065383] __kasan_slab_free+0x10a/0x190 [ 24.065916] kmem_cache_free+0x10d/0x4d0 [ 24.066428] rcu_core+0x8c8/0x2860 [ 24.066871] __do_softirq+0x1b7/0x7d4 [ 24.067341] [ 24.067555] Last potentially related work creation: [ 24.068140] kasan_save_stack+0x22/0x50 [ 24.068649] __kasan_record_aux_stack+0x8e/0xa0 [ 24.069216] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.069856] remove_vma+0x139/0x170 [ 24.070308] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.070869] do_vmi_munmap+0x1f1/0x2b0 [ 24.071346] __vm_munmap+0x138/0x3a0 [ 24.071807] __x64_sys_munmap+0x59/0x80 [ 24.072315] do_syscall_64+0x3f/0x90 [ 24.072793] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.073432] [ 24.073652] The buggy address belongs to the object at ffff88800e2b03a0 [ 24.073652] which belongs to the cache vm_area_struct of size 168 [ 24.075099] The buggy address is located 88 bytes inside of [ 24.075099] freed 168-byte region [ffff88800e2b03a0, ffff88800e2b0448) [ 24.076504] [ 24.076720] The buggy address belongs to the physical page: [ 24.077366] page:00000000083e4490 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe2b0 [ 24.078436] memcg:ffff88800c886301 [ 24.078867] anon flags: 0x100000000000200(slab|node=0|zone=1) [ 24.079559] page_type: 0xffffffff() [ 24.080016] raw: 0100000000000200 ffff8880087a0c80 ffffea00003a3980 dead000000000007 [ 24.080927] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800c886301 [ 24.081828] page dumped because: kasan: bad access detected [ 24.082485] [ 24.082701] Memory state around the buggy address: [ 24.083287] ffff88800e2b0280: fc fc fc fc fc fc fc fa fb fb fb fb fb fb fb fb [ 24.084168] ffff88800e2b0300: fb fb fb fb fb fb fb fb fb fb fb fb fc fc fc fc [ 24.085029] >ffff88800e2b0380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 24.085885] ^ [ 24.086730] ffff88800e2b0400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 24.087581] ffff88800e2b0480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.088439] ================================================================== [ 24.089401] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 25.575247] BUG: Bad rss-counter state mm:00000000cf87187b type:MM_FILEPAGES val:33 [ 25.576153] BUG: Bad rss-counter state mm:00000000cf87187b type:MM_ANONPAGES val:22 [ 26.006918] BUG: Bad rss-counter state mm:000000003d3421fc type:MM_FILEPAGES val:33 [ 26.008621] BUG: Bad rss-counter state mm:000000003d3421fc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:18537' (ECDSA) to the list of known hosts. 2023/06/20 18:56:21 fuzzer started 2023/06/20 18:56:21 dialing manager at localhost:36067 2023/06/20 18:56:21 checking machine... 2023/06/20 18:56:21 checking revisions... [ 26.664347] kmemleak: Automatic memory scanning thread ended 2023/06/20 18:56:21 testing simple program... [ 26.714387] cgroup: Unknown subsys name 'net' [ 26.747102] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 18:56:21 Registers: info registers vcpu 0 RAX=0000000000000007 RBX=0000000000000001 RCX=ffffffff83641156 RDX=0000000000026411 RSI=0000000000026411 RDI=ffffffff86582a34 RBP=ffff88806ce09af0 RSP=ffff88806ce09a28 R8 =0000000000000000 R9 =ffff88806ce09ad8 R10=0000000000038001 R11=000000000008ab69 R12=ffff88806ce09af8 R13=ffff88806ce09ae0 R14=ffff88806ce09ad9 R15=ffff88806ce09a98 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 00007ff52b93b900 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=00007ff52ad48ab0 CR3=000000000d5e6000 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=756f6a2f646d65747379732f6e75722f XMM01=00676f6c7379732f6c616e72756f6a2f XMM02=756f6a2f646d65747379732f6e75722f XMM03=006c616e72756f6a2f646d6574737973 XMM04=65a1c165e06d605200000000000ae988 XMM05=b0003b3cc2a711a600000000001326b0 XMM06=806171799158d9670000000000131130 XMM07=fb795ef6d65770560000000000121678 XMM08=4f5453444600273d67736d000d0a0920 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=0000000000000001 RBX=ffff888018bbf068 RCX=ffff888018bbf108 RDX=1ffff11003177e18 RSI=ffff888018bbf100 RDI=ffffffff813ad720 RBP=ffff888018bbf0c0 RSP=ffff888018bbf050 R8 =0000000000000001 R9 =ffff888018bbf0a8 R10=0000000000038001 R11=0000000000003c0d R12=ffff888018bbf130 R13=0000000000000000 R14=ffff8880164b51c0 R15=0000000000002800 RIP=ffffffff81130399 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 00007fb86c44a900 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=00007fb86c429020 CR3=0000000019fc0000 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=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