syzkaller login: [ 42.271823] BUG: Bad rss-counter state mm:000000009e62ed44 type:MM_FILEPAGES val:33 [ 42.272735] BUG: Bad rss-counter state mm:000000009e62ed44 type:MM_ANONPAGES val:22 [ 42.438737] ================================================================== [ 42.439691] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 42.440641] Read of size 8 at addr ffff888018334058 by task sshd/227 [ 42.441529] [ 42.441757] CPU: 0 PID: 227 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 42.442623] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 42.443655] Call Trace: [ 42.443983] [ 42.444269] dump_stack_lvl+0x91/0xf0 [ 42.444764] print_report+0xcc/0x620 [ 42.445253] ? __virt_addr_valid+0x102/0x340 [ 42.445810] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.446445] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.447072] kasan_report+0xbe/0xf0 [ 42.447562] ? vma_interval_tree_remove+0xc75/0xec0 [ 42.448202] vma_interval_tree_remove+0xc75/0xec0 [ 42.448802] vma_prepare+0xc54/0x11a0 [ 42.449288] __split_vma+0x5af/0x950 [ 42.449757] ? __pfx___split_vma+0x10/0x10 [ 42.450285] ? find_held_lock+0x2c/0x110 [ 42.450803] do_vmi_align_munmap+0x2ba/0x11f0 [ 42.451366] ? lock_is_held_type+0x9f/0x120 [ 42.451922] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 42.452528] ? mtree_range_walk+0x632/0x900 [ 42.453076] ? mas_walk+0x5c7/0x7c0 [ 42.453548] do_vmi_munmap+0x1f1/0x2b0 [ 42.454040] mmap_region+0x1f9/0x2660 [ 42.454529] ? vm_mmap_pgoff+0x15c/0x3a0 [ 42.455042] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 42.455775] ? __pfx_lock_acquire+0x10/0x10 [ 42.456306] ? __pfx_mmap_region+0x10/0x10 [ 42.456838] ? security_mmap_addr+0x7d/0xa0 [ 42.457378] ? get_unmapped_area+0x1f5/0x3f0 [ 42.457928] do_mmap+0x854/0xf00 [ 42.458365] vm_mmap_pgoff+0x1a6/0x3a0 [ 42.458860] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 42.459439] ksys_mmap_pgoff+0x3af/0x500 [ 42.459956] do_syscall_64+0x3f/0x90 [ 42.460431] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.461071] RIP: 0033:0x7f2bb74e1d82 [ 42.461536] 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 [ 42.463655] RSP: 002b:00007ffd1c0a54e8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 42.464573] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f2bb74e1d82 [ 42.465415] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f2bb691b000 [ 42.466259] RBP: 00007f2bb691b000 R08: 0000000000000009 R09: 0000000000001000 [ 42.467099] R10: 0000000000000812 R11: 0000000000000206 R12: 000055592f685ec0 [ 42.467962] R13: 00007ffd1c0a5500 R14: 00007ffd1c0a5530 R15: 00007ffd1c0a5890 [ 42.468819] [ 42.469112] [ 42.469326] Allocated by task 220: [ 42.469752] kasan_save_stack+0x22/0x50 [ 42.470262] kasan_set_track+0x25/0x30 [ 42.470752] __kasan_slab_alloc+0x59/0x70 [ 42.471280] kmem_cache_alloc+0x16b/0x370 [ 42.471832] vm_area_dup+0x20/0x160 [ 42.472289] __split_vma+0x170/0x950 [ 42.472762] split_vma+0xc6/0x110 [ 42.473222] mprotect_fixup+0x8d2/0xb30 [ 42.473733] do_mprotect_pkey+0x87e/0xd40 [ 42.474261] __x64_sys_mprotect+0x78/0xc0 [ 42.474781] do_syscall_64+0x3f/0x90 [ 42.475260] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.475925] [ 42.476146] Freed by task 220: [ 42.476547] kasan_save_stack+0x22/0x50 [ 42.477058] kasan_set_track+0x25/0x30 [ 42.477554] kasan_save_free_info+0x2b/0x50 [ 42.478088] __kasan_slab_free+0x10a/0x190 [ 42.478642] kmem_cache_free+0x10d/0x4d0 [ 42.479152] rcu_core+0x8c8/0x2860 [ 42.479632] __do_softirq+0x1b7/0x7d4 [ 42.480120] [ 42.480339] Last potentially related work creation: [ 42.480929] kasan_save_stack+0x22/0x50 [ 42.481448] __kasan_record_aux_stack+0x8e/0xa0 [ 42.482040] __call_rcu_common.constprop.0+0x6a/0xb90 [ 42.482716] remove_vma+0x139/0x170 [ 42.483202] do_vmi_align_munmap+0xd4a/0x11f0 [ 42.483800] do_vmi_munmap+0x1f1/0x2b0 [ 42.484310] __vm_munmap+0x138/0x3a0 [ 42.484806] __x64_sys_munmap+0x59/0x80 [ 42.485326] do_syscall_64+0x3f/0x90 [ 42.485826] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 42.486500] [ 42.486730] The buggy address belongs to the object at ffff888018334000 [ 42.486730] which belongs to the cache vm_area_struct of size 168 [ 42.488342] The buggy address is located 88 bytes inside of [ 42.488342] freed 168-byte region [ffff888018334000, ffff8880183340a8) [ 42.489850] [ 42.490082] The buggy address belongs to the physical page: [ 42.490796] page:00000000bcb9508d refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x18334 [ 42.491978] memcg:ffff88800f01c301 [ 42.492433] flags: 0x100000000000200(slab|node=0|zone=1) [ 42.493125] page_type: 0xffffffff() [ 42.493607] raw: 0100000000000200 ffff88800879fc80 dead000000000122 0000000000000000 [ 42.494591] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800f01c301 [ 42.495575] page dumped because: kasan: bad access detected [ 42.496291] [ 42.496525] Memory state around the buggy address: [ 42.497148] ffff888018333f00: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fc fc [ 42.498062] ffff888018333f80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 42.498978] >ffff888018334000: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.499999] ^ [ 42.500860] ffff888018334080: fb fb fb fb fb fc fc fc fc fc fc fc fc fa fb fb [ 42.501928] ffff888018334100: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 42.502956] ================================================================== [ 42.504224] Disabling lock debugging due to kernel taint [ 44.958954] BUG: Bad rss-counter state mm:00000000606f0f05 type:MM_FILEPAGES val:33 [ 44.959999] BUG: Bad rss-counter state mm:00000000606f0f05 type:MM_ANONPAGES val:22 [ 45.547651] BUG: Bad rss-counter state mm:000000000bd8c9bc type:MM_FILEPAGES val:33 [ 45.548842] BUG: Bad rss-counter state mm:000000000bd8c9bc type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:37913' (ECDSA) to the list of known hosts. 2023/06/19 22:09:33 fuzzer started 2023/06/19 22:09:33 dialing manager at localhost:44161 2023/06/19 22:09:33 checking machine... 2023/06/19 22:09:33 checking revisions... [ 46.207464] kmemleak: Automatic memory scanning thread ended 2023/06/19 22:09:33 testing simple program... [ 46.260237] cgroup: Unknown subsys name 'net' [ 46.306231] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 22:09:29 Registers: info registers vcpu 0 RAX=ffffffff8180c522 RBX=ffffffff813ad420 RCX=ffffffff860d6801 RDX=1ffff1100d9c135e RSI=0000000000000000 RDI=ffffffff8180c522 RBP=ffff88806ce09b30 RSP=ffff88806ce09a98 R8 =ffffffff860d68fa R9 =ffff88806ce09ad8 R10=0000000000038001 R11=0000000000010b7e R12=ffff88806ce09b60 R13=0000000000000000 R14=ffffffff8542a6c0 R15=ffff88801655b2e0 RIP=ffffffff810bd06d 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 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=00007f22d9801d20 CR3=000000000a0b6000 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=d9c179efcce419a2de4c480bfa29ee3d XMM02=000000000011e8b8eff9b2d0a8fce9cb XMM03=000000000011e9882c67c8bc2e329bc3 XMM04=1375286f112e8d2c00000000000ae988 XMM05=637c1e752e7b6f6c00000000001352d0 XMM06=8fede82a5ad58cbe0000000000134c70 XMM07=e042d86d42eb936e0000000000124e08 XMM08=158b3e9380f824f5000000000011e988 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=00000000dead4ead RBX=ffffffff85ba4c60 RCX=0000000000000000 RDX=0000000000000000 RSI=0000000000000008 RDI=ffffffff85ba4c64 RBP=1ffff110032daf86 RSP=ffff8880196d7c28 R8 =0000000000000000 R9 =fffffbfff0ba77da R10=ffffffff85d3bed7 R11=00000000000b6996 R12=0000000000000246 R13=0000000000000000 R14=0000000000000003 R15=0000000000000001 RIP=ffffffff812e004a RFL=00000046 [---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 00007f74e18c1900 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=00007ffdcb13e000 CR3=000000000f1b4000 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=ffffffffffffffffffff000000000000 XMM01=000000000000003635006b6f6c6c756e XMM02=62003d73646e756f7200323135616873 XMM03=5320444f4854454d5f54505952434e45 XMM04=40404040404040404040404040404040 XMM05=5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a5a XMM06=20202020202020202020202020202020 XMM07=00000000000000000000000000000000 XMM08=00000000000000000000000000202020 XMM09=ff0000ffffffffffff00000000ffffff XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000