[ 33.342910] BUG: Bad rss-counter state mm:00000000770ae1a0 type:MM_FILEPAGES val:33 [ 33.343994] BUG: Bad rss-counter state mm:00000000770ae1a0 type:MM_ANONPAGES val:22 [ 33.507162] ================================================================== [ 33.508332] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 33.509570] Read of size 8 at addr ffff8880145baa50 by task sshd/218 [ 33.510434] [ 33.510678] CPU: 1 PID: 218 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 33.511655] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 33.512739] Call Trace: [ 33.513101] [ 33.513421] dump_stack_lvl+0x91/0xf0 [ 33.513969] print_report+0xcc/0x620 [ 33.514518] ? __virt_addr_valid+0x102/0x340 [ 33.515145] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.515846] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.516541] kasan_report+0xbe/0xf0 [ 33.517069] ? vma_interval_tree_remove+0xc75/0xec0 [ 33.517760] vma_interval_tree_remove+0xc75/0xec0 [ 33.518438] vma_prepare+0xc54/0x11a0 [ 33.518988] __split_vma+0x5af/0x950 [ 33.519521] ? __pfx___split_vma+0x10/0x10 [ 33.520133] ? find_held_lock+0x2c/0x110 [ 33.520712] do_vmi_align_munmap+0x2ba/0x11f0 [ 33.521348] ? lock_is_held_type+0x9f/0x120 [ 33.521955] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 33.522632] ? mtree_range_walk+0x632/0x900 [ 33.523248] ? mas_walk+0x5c7/0x7c0 [ 33.523781] do_vmi_munmap+0x1f1/0x2b0 [ 33.524338] mmap_region+0x1f9/0x2660 [ 33.524880] ? vm_mmap_pgoff+0x15c/0x3a0 [ 33.525462] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 33.526280] ? __pfx_lock_acquire+0x10/0x10 [ 33.526888] ? __pfx_mmap_region+0x10/0x10 [ 33.527492] ? security_mmap_addr+0x7d/0xa0 [ 33.528119] ? get_unmapped_area+0x1f5/0x3f0 [ 33.528756] do_mmap+0x854/0xf00 [ 33.529252] vm_mmap_pgoff+0x1a6/0x3a0 [ 33.529812] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 33.530450] ksys_mmap_pgoff+0x3af/0x500 [ 33.531026] do_syscall_64+0x3f/0x90 [ 33.531566] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.532307] RIP: 0033:0x7f20ea599d82 [ 33.532825] 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 [ 33.535234] RSP: 002b:00007ffcb3c26a08 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 33.536276] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f20ea599d82 [ 33.537234] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f20e99d3000 [ 33.538192] RBP: 00007f20e99d3000 R08: 0000000000000009 R09: 0000000000001000 [ 33.539149] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cdf75fef70 [ 33.540122] R13: 00007ffcb3c26a20 R14: 00007ffcb3c26a50 R15: 00007ffcb3c26db0 [ 33.541110] [ 33.541435] [ 33.541682] Allocated by task 209: [ 33.542166] kasan_save_stack+0x22/0x50 [ 33.542736] kasan_set_track+0x25/0x30 [ 33.543295] __kasan_slab_alloc+0x59/0x70 [ 33.543911] kmem_cache_alloc+0x16b/0x370 [ 33.544496] vm_area_dup+0x20/0x160 [ 33.545009] __split_vma+0x170/0x950 [ 33.545535] split_vma+0xc6/0x110 [ 33.546026] mprotect_fixup+0x8d2/0xb30 [ 33.546597] do_mprotect_pkey+0x87e/0xd40 [ 33.547183] __x64_sys_mprotect+0x78/0xc0 [ 33.547782] do_syscall_64+0x3f/0x90 [ 33.548319] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.549044] [ 33.549289] Freed by task 209: [ 33.549731] kasan_save_stack+0x22/0x50 [ 33.550378] kasan_set_track+0x25/0x30 [ 33.550937] kasan_save_free_info+0x2b/0x50 [ 33.551541] __kasan_slab_free+0x10a/0x190 [ 33.552159] kmem_cache_free+0x10d/0x4d0 [ 33.552728] rcu_core+0x8c8/0x2860 [ 33.553224] __do_softirq+0x1b7/0x7d4 [ 33.553766] [ 33.554005] Last potentially related work creation: [ 33.554659] kasan_save_stack+0x22/0x50 [ 33.555302] __kasan_record_aux_stack+0x8e/0xa0 [ 33.555960] __call_rcu_common.constprop.0+0x6a/0xb90 [ 33.556695] remove_vma+0x139/0x170 [ 33.557202] do_vmi_align_munmap+0xd4a/0x11f0 [ 33.557829] do_vmi_munmap+0x1f1/0x2b0 [ 33.558372] __vm_munmap+0x138/0x3a0 [ 33.558897] __x64_sys_munmap+0x59/0x80 [ 33.559453] do_syscall_64+0x3f/0x90 [ 33.559992] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 33.560712] [ 33.560954] The buggy address belongs to the object at ffff8880145ba9f8 [ 33.560954] which belongs to the cache vm_area_struct of size 168 [ 33.562607] The buggy address is located 88 bytes inside of [ 33.562607] freed 168-byte region [ffff8880145ba9f8, ffff8880145baaa0) [ 33.564194] [ 33.564437] The buggy address belongs to the physical page: [ 33.565179] page:00000000e635f573 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x145ba [ 33.566413] memcg:ffff888013f9cb01 [ 33.566898] flags: 0x100000000000200(slab|node=0|zone=1) [ 33.567614] page_type: 0xffffffff() [ 33.568130] raw: 0100000000000200 ffff88800879fc80 ffffea000037ed00 0000000000000004 [ 33.569163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888013f9cb01 [ 33.570182] page dumped because: kasan: bad access detected [ 33.570927] [ 33.571170] Memory state around the buggy address: [ 33.571833] ffff8880145ba900: fc fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.572790] ffff8880145ba980: 00 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa [ 33.573744] >ffff8880145baa00: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 33.574702] ^ [ 33.575482] ffff8880145baa80: fb fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 [ 33.576436] ffff8880145bab00: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 33.577383] ================================================================== [ 33.578474] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 35.704629] BUG: Bad rss-counter state mm:000000005e67c531 type:MM_FILEPAGES val:33 [ 35.705640] BUG: Bad rss-counter state mm:000000005e67c531 type:MM_ANONPAGES val:22 [ 36.243786] BUG: Bad rss-counter state mm:000000008b875bf6 type:MM_FILEPAGES val:33 [ 36.244963] BUG: Bad rss-counter state mm:000000008b875bf6 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:8589' (ECDSA) to the list of known hosts. 2023/06/20 00:54:46 fuzzer started 2023/06/20 00:54:46 dialing manager at localhost:44161 2023/06/20 00:54:46 checking machine... 2023/06/20 00:54:46 checking revisions... [ 36.978396] kmemleak: Automatic memory scanning thread ended 2023/06/20 00:54:46 testing simple program... [ 37.026788] cgroup: Unknown subsys name 'net' [ 37.076703] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 00:54:36 Registers: info registers vcpu 0 RAX=dffffc0000000000 RBX=ffff888015a9f2d8 RCX=0000000000000001 RDX=1ffff11002b53e5d RSI=ffff888015a9f828 RDI=ffff888015a9f2e8 RBP=ffff888015a9f828 RSP=ffff888015a9f230 R8 =ffffffff863b66a4 R9 =ffff888015a9f318 R10=0000000000038001 R11=000000000008b5ce R12=0000000000000008 R13=ffff888015a98000 R14=ffff888015a9f830 R15=ffff888015a9f2d8 RIP=ffffffff81130468 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 00007ffbfe1ec900 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=00007ffbfe7a3618 CR3=0000000009836000 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=ffffffff8450c50e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffff888008e27e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3bed0 R13=1ffff110011c4fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8450d49f 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=00007fe18b6329b0 CR3=00000000095b6000 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=0b05bc26c130b2bf50410f0e1dae172e XMM02=000000000011dbb8eff9b2d0a8fce9cb XMM03=000000000011dc882c67c8bc2e329bc3 XMM04=33e3afe61d21429000000000000ae988 XMM05=751b9502027dc0b900000000001337a0 XMM06=ca7d362b61a07ea90000000000132978 XMM07=e042d86d42eb936e0000000000124180 XMM08=a00d49bb5fbd1afe000000000011dc88 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000