syzkaller login: [ 30.892323] sshd (212) used greatest stack depth: 24424 bytes left [ 30.894320] BUG: Bad rss-counter state mm:00000000285a0965 type:MM_FILEPAGES val:33 [ 30.895603] BUG: Bad rss-counter state mm:00000000285a0965 type:MM_ANONPAGES val:22 [ 31.046803] ================================================================== [ 31.047887] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 31.049027] Read of size 8 at addr ffff88800f5873f8 by task sshd/219 [ 31.049930] [ 31.050263] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 31.051317] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 31.052469] Call Trace: [ 31.052890] [ 31.053231] dump_stack_lvl+0x91/0xf0 [ 31.053806] print_report+0xcc/0x620 [ 31.054291] ? __virt_addr_valid+0x102/0x340 [ 31.054844] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.055467] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.056093] kasan_report+0xbe/0xf0 [ 31.056569] ? vma_interval_tree_remove+0xc75/0xec0 [ 31.057216] vma_interval_tree_remove+0xc75/0xec0 [ 31.057822] vma_prepare+0xc54/0x11a0 [ 31.058298] __split_vma+0x5af/0x950 [ 31.058772] ? __pfx___split_vma+0x10/0x10 [ 31.059298] ? find_held_lock+0x2c/0x110 [ 31.059827] do_vmi_align_munmap+0x2ba/0x11f0 [ 31.060395] ? lock_is_held_type+0x9f/0x120 [ 31.060967] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 31.061573] ? mtree_range_walk+0x632/0x900 [ 31.062130] ? mas_walk+0x5c7/0x7c0 [ 31.062607] do_vmi_munmap+0x1f1/0x2b0 [ 31.063105] mmap_region+0x1f9/0x2660 [ 31.063590] ? vm_mmap_pgoff+0x15c/0x3a0 [ 31.064103] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 31.064851] ? __pfx_lock_acquire+0x10/0x10 [ 31.065390] ? __pfx_mmap_region+0x10/0x10 [ 31.065917] ? security_mmap_addr+0x7d/0xa0 [ 31.066444] ? get_unmapped_area+0x1f5/0x3f0 [ 31.066994] do_mmap+0x854/0xf00 [ 31.067437] vm_mmap_pgoff+0x1a6/0x3a0 [ 31.067932] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 31.068497] ksys_mmap_pgoff+0x3af/0x500 [ 31.069032] do_syscall_64+0x3f/0x90 [ 31.069508] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.070160] RIP: 0033:0x7ff13827dd82 [ 31.070615] 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 [ 31.072755] RSP: 002b:00007ffc6fb6f578 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 31.073704] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007ff13827dd82 [ 31.074552] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007ff1376b7000 [ 31.075400] RBP: 00007ff1376b7000 R08: 0000000000000009 R09: 0000000000001000 [ 31.076248] R10: 0000000000000812 R11: 0000000000000206 R12: 000055cd45321ec0 [ 31.077122] R13: 00007ffc6fb6f590 R14: 00007ffc6fb6f5c0 R15: 00007ffc6fb6f920 [ 31.077983] [ 31.078278] [ 31.078496] Allocated by task 212: [ 31.078922] kasan_save_stack+0x22/0x50 [ 31.079435] kasan_set_track+0x25/0x30 [ 31.079929] __kasan_slab_alloc+0x59/0x70 [ 31.080462] kmem_cache_alloc+0x16b/0x370 [ 31.081000] vm_area_dup+0x20/0x160 [ 31.081457] __split_vma+0x170/0x950 [ 31.081922] split_vma+0xc6/0x110 [ 31.082358] mprotect_fixup+0x8d2/0xb30 [ 31.082854] do_mprotect_pkey+0x87e/0xd40 [ 31.083372] __x64_sys_mprotect+0x78/0xc0 [ 31.083893] do_syscall_64+0x3f/0x90 [ 31.084365] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.085051] [ 31.085270] Freed by task 209: [ 31.085671] kasan_save_stack+0x22/0x50 [ 31.086180] kasan_set_track+0x25/0x30 [ 31.086673] kasan_save_free_info+0x2b/0x50 [ 31.087202] __kasan_slab_free+0x10a/0x190 [ 31.087734] kmem_cache_free+0x10d/0x4d0 [ 31.088239] rcu_core+0x8c8/0x2860 [ 31.088679] __do_softirq+0x1b7/0x7d4 [ 31.089195] [ 31.089414] Last potentially related work creation: [ 31.089994] kasan_save_stack+0x22/0x50 [ 31.090496] __kasan_record_aux_stack+0x8e/0xa0 [ 31.091075] __call_rcu_common.constprop.0+0x6a/0xb90 [ 31.091773] remove_vma+0x139/0x170 [ 31.092224] do_vmi_align_munmap+0xd4a/0x11f0 [ 31.092783] do_vmi_munmap+0x1f1/0x2b0 [ 31.093303] __vm_munmap+0x138/0x3a0 [ 31.093770] __x64_sys_munmap+0x59/0x80 [ 31.094264] do_syscall_64+0x3f/0x90 [ 31.094737] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 31.095372] [ 31.095590] The buggy address belongs to the object at ffff88800f5873a0 [ 31.095590] which belongs to the cache vm_area_struct of size 168 [ 31.097086] The buggy address is located 88 bytes inside of [ 31.097086] freed 168-byte region [ffff88800f5873a0, ffff88800f587448) [ 31.098610] [ 31.098825] The buggy address belongs to the physical page: [ 31.099470] page:000000003648e882 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xf587 [ 31.100529] memcg:ffff8880144c8b01 [ 31.100973] flags: 0x100000000000200(slab|node=0|zone=1) [ 31.101606] page_type: 0xffffffff() [ 31.102051] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 31.102953] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff8880144c8b01 [ 31.103843] page dumped because: kasan: bad access detected [ 31.104488] [ 31.104703] Memory state around the buggy address: [ 31.105306] ffff88800f587280: fc fc fc fc fc fc fc 00 00 00 00 00 00 00 00 00 [ 31.106138] ffff88800f587300: 00 00 00 00 00 00 00 00 00 00 00 00 fc fc fc fc [ 31.106970] >ffff88800f587380: fc fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb [ 31.107808] ^ [ 31.108640] ffff88800f587400: fb fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc [ 31.109515] ffff88800f587480: fc fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 31.110359] ================================================================== [ 31.111350] Disabling lock debugging due to kernel taint [ 33.558111] BUG: Bad rss-counter state mm:00000000c3fed3c1 type:MM_FILEPAGES val:33 [ 33.559778] BUG: Bad rss-counter state mm:00000000c3fed3c1 type:MM_ANONPAGES val:22 [ 33.974326] BUG: Bad rss-counter state mm:000000000a900bbc type:MM_FILEPAGES val:33 [ 33.975008] BUG: Bad rss-counter state mm:000000000a900bbc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:64650' (ECDSA) to the list of known hosts. 2023/06/19 13:10:51 fuzzer started 2023/06/19 13:10:51 dialing manager at localhost:44161 2023/06/19 13:10:51 checking machine... 2023/06/19 13:10:51 checking revisions... [ 34.743662] kmemleak: Automatic memory scanning thread ended 2023/06/19 13:10:52 testing simple program... [ 34.791420] cgroup: Unknown subsys name 'net' [ 34.827537] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 13:10:49 Registers: info registers vcpu 0 RAX=0000000080000000 RBX=0000000000000000 RCX=0000000000000000 RDX=ffff88800c6a1b40 RSI=ffffffff81ef5568 RDI=0000000000000005 RBP=dffffc0000000000 RSP=ffff88801468fbb0 R8 =0000000000000005 R9 =0000000000000000 R10=0000000000000000 R11=00000000000b6996 R12=0000000000000000 R13=ffff888019ad7640 R14=ffff888016c1c000 R15=ffff888019ad7640 RIP=ffffffff814c07eb 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 00007f6201fc3900 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=00007f620257a618 CR3=0000000015da8000 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=00007f626a8f0a70 CR3=000000000d5c2000 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=9d50e4d1c167beb33545d1ca94930350 XMM02=ec2efd57dc4c00df0000000000121c38 XMM03=aa5bfb0251d6d4390000000000121d08 XMM04=10002be6cbe4e51700000000000ae988 XMM05=125cabc3f22719250000000000134d40 XMM06=806171799158d96700000000001349c8 XMM07=e042d86d42eb936e0000000000125028 XMM08=aa5bfb0251d6d4390000000000121d08 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000