[ 43.851982] BUG: Bad rss-counter state mm:00000000956f9150 type:MM_FILEPAGES val:33 [ 43.853968] BUG: Bad rss-counter state mm:00000000956f9150 type:MM_ANONPAGES val:22 Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 44.038311] ================================================================== [ 44.039233] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 44.040196] Read of size 8 at addr ffff888017be1df0 by task sshd/220 [ 44.040981] [ 44.041208] CPU: 1 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 44.042313] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 44.043377] Call Trace: [ 44.043701] [ 44.043996] dump_stack_lvl+0x91/0xf0 [ 44.044517] print_report+0xcc/0x620 [ 44.045151] ? __virt_addr_valid+0x102/0x340 [ 44.045821] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.046559] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.047331] kasan_report+0xbe/0xf0 [ 44.047918] ? vma_interval_tree_remove+0xc75/0xec0 [ 44.048696] vma_interval_tree_remove+0xc75/0xec0 [ 44.049433] vma_prepare+0xc54/0x11a0 [ 44.050025] __split_vma+0x5af/0x950 [ 44.050648] ? __pfx___split_vma+0x10/0x10 [ 44.051224] ? find_held_lock+0x2c/0x110 [ 44.051745] do_vmi_align_munmap+0x2ba/0x11f0 [ 44.052315] ? lock_is_held_type+0x9f/0x120 [ 44.052853] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 44.053472] ? mtree_range_walk+0x632/0x900 [ 44.054031] ? mas_walk+0x5c7/0x7c0 [ 44.054512] do_vmi_munmap+0x1f1/0x2b0 [ 44.055039] mmap_region+0x1f9/0x2660 [ 44.055538] ? vm_mmap_pgoff+0x15c/0x3a0 [ 44.056067] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 44.056793] ? __pfx_lock_acquire+0x10/0x10 [ 44.057342] ? __pfx_mmap_region+0x10/0x10 [ 44.057877] ? security_mmap_addr+0x7d/0xa0 [ 44.058409] ? get_unmapped_area+0x1f5/0x3f0 [ 44.058973] do_mmap+0x854/0xf00 [ 44.059413] vm_mmap_pgoff+0x1a6/0x3a0 [ 44.059918] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 44.060522] ksys_mmap_pgoff+0x3af/0x500 [ 44.061067] do_syscall_64+0x3f/0x90 [ 44.061554] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.062210] RIP: 0033:0x7f3e08b29d82 [ 44.062709] 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 [ 44.064867] RSP: 002b:00007fff37df0a78 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 44.065769] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f3e08b29d82 [ 44.066627] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f3e07f63000 [ 44.067473] RBP: 00007f3e07f63000 R08: 0000000000000009 R09: 0000000000001000 [ 44.068325] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f490f75ec0 [ 44.069174] R13: 00007fff37df0a90 R14: 00007fff37df0ac0 R15: 00007fff37df0e20 [ 44.070038] [ 44.070332] [ 44.070550] Allocated by task 213: [ 44.070988] kasan_save_stack+0x22/0x50 [ 44.071492] kasan_set_track+0x25/0x30 [ 44.071989] __kasan_slab_alloc+0x59/0x70 [ 44.072521] kmem_cache_alloc+0x16b/0x370 [ 44.073042] vm_area_dup+0x20/0x160 [ 44.073495] __split_vma+0x170/0x950 [ 44.073972] split_vma+0xc6/0x110 [ 44.074423] mprotect_fixup+0x8d2/0xb30 [ 44.074965] do_mprotect_pkey+0x87e/0xd40 [ 44.075489] __x64_sys_mprotect+0x78/0xc0 [ 44.076022] do_syscall_64+0x3f/0x90 [ 44.076492] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.077150] [ 44.077367] Freed by task 213: [ 44.077763] kasan_save_stack+0x22/0x50 [ 44.078274] kasan_set_track+0x25/0x30 [ 44.078781] kasan_save_free_info+0x2b/0x50 [ 44.079373] __kasan_slab_free+0x10a/0x190 [ 44.079911] kmem_cache_free+0x10d/0x4d0 [ 44.080428] rcu_core+0x8c8/0x2860 [ 44.080873] __do_softirq+0x1b7/0x7d4 [ 44.081349] [ 44.081563] Last potentially related work creation: [ 44.082148] kasan_save_stack+0x22/0x50 [ 44.082674] __kasan_record_aux_stack+0x8e/0xa0 [ 44.083250] __call_rcu_common.constprop.0+0x6a/0xb90 [ 44.083889] remove_vma+0x139/0x170 [ 44.084344] do_vmi_align_munmap+0xd4a/0x11f0 [ 44.084900] do_vmi_munmap+0x1f1/0x2b0 [ 44.085387] __vm_munmap+0x138/0x3a0 [ 44.085853] __x64_sys_munmap+0x59/0x80 [ 44.086352] do_syscall_64+0x3f/0x90 [ 44.086848] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 44.087503] [ 44.087721] The buggy address belongs to the object at ffff888017be1d98 [ 44.087721] which belongs to the cache vm_area_struct of size 168 [ 44.089213] The buggy address is located 88 bytes inside of [ 44.089213] freed 168-byte region [ffff888017be1d98, ffff888017be1e40) [ 44.090648] [ 44.090871] The buggy address belongs to the physical page: [ 44.091546] page:0000000014f35241 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x17be1 [ 44.092662] memcg:ffff888009b6e801 [ 44.093099] flags: 0x100000000000200(slab|node=0|zone=1) [ 44.093749] page_type: 0xffffffff() [ 44.094212] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 44.095163] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff888009b6e801 [ 44.096075] page dumped because: kasan: bad access detected [ 44.096742] [ 44.096967] Memory state around the buggy address: [ 44.097558] ffff888017be1c80: fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 00 [ 44.098423] ffff888017be1d00: 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc fc [ 44.099302] >ffff888017be1d80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 44.100166] ^ [ 44.100985] ffff888017be1e00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 44.101853] ffff888017be1e80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 44.102729] ================================================================== [ 44.103648] Disabling lock debugging due to kernel taint [ 46.083500] BUG: Bad rss-counter state mm:0000000024f18c83 type:MM_FILEPAGES val:33 [ 46.084727] BUG: Bad rss-counter state mm:0000000024f18c83 type:MM_ANONPAGES val:22 [ 46.508508] BUG: Bad rss-counter state mm:000000002bbc99bf type:MM_FILEPAGES val:33 [ 46.509955] BUG: Bad rss-counter state mm:000000002bbc99bf type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:44817' (ECDSA) to the list of known hosts. 2023/06/19 14:16:07 fuzzer started 2023/06/19 14:16:08 dialing manager at localhost:44161 2023/06/19 14:16:08 checking machine... 2023/06/19 14:16:08 checking revisions... [ 47.207803] kmemleak: Automatic memory scanning thread ended 2023/06/19 14:16:08 testing simple program... [ 47.258544] cgroup: Unknown subsys name 'net' [ 47.311586] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 14:15:47 Registers: info registers vcpu 0 RAX=0000000000000000 RBX=ffffffff85dbc1e4 RCX=ffffffff813ad6cf RDX=0000000000000005 RSI=ffffffff860d68c0 RDI=ffffffff85dbc1cc RBP=ffffffff85dbc1e8 RSP=ffff888008d7f8c0 R8 =ffffffff860d68c0 R9 =ffff888008d7f9b8 R10=0000000000038001 R11=0000000000010b7e R12=ffffffff85dbc1fc R13=ffffffff85dbc1cc R14=ffffffff85dbc1e4 R15=dffffc0000000000 RIP=ffffffff8112fc68 RFL=00000216 [----AP-] 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=00007f58a30d6618 CR3=0000000016132000 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=ffff888008c58400 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=00007f24a77e1020 CR3=0000000013a36000 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=aef91dc4937a77af1f48fb8e34725da6 XMM02=000000000011f8a8eff9b2d0a8fce9cb XMM03=000000000011f9782c67c8bc2e329bc3 XMM04=e47eae320c1bb47d00000000000ae988 XMM05=19e9129bd510f2350000000000132ea0 XMM06=f9836a958b5ac8590000000000132078 XMM07=e042d86d42eb936e0000000000123840 XMM08=4535be8e66cb4479000000000011f978 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000