syzkaller login: [ 36.264931] BUG: Bad rss-counter state mm:00000000fd2c01cb type:MM_FILEPAGES val:33 [ 36.266242] BUG: Bad rss-counter state mm:00000000fd2c01cb type:MM_ANONPAGES val:22 [ 36.426714] ================================================================== [ 36.427591] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 36.428472] Read of size 8 at addr ffff88800e12aed8 by task sshd/219 [ 36.429216] [ 36.429423] CPU: 1 PID: 219 Comm: sshd Not tainted 6.4.0-rc7-next-20230620 #1 [ 36.430399] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 36.431314] Call Trace: [ 36.431621] [ 36.431889] dump_stack_lvl+0x91/0xf0 [ 36.432355] print_report+0xcc/0x620 [ 36.432824] ? __virt_addr_valid+0x102/0x340 [ 36.433344] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.433924] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.434502] kasan_report+0xbe/0xf0 [ 36.434960] ? vma_interval_tree_remove+0xc75/0xec0 [ 36.435542] vma_interval_tree_remove+0xc75/0xec0 [ 36.436117] vma_prepare+0xc54/0x11a0 [ 36.436566] __split_vma+0x5af/0x950 [ 36.437039] ? __pfx___split_vma+0x10/0x10 [ 36.437561] ? find_held_lock+0x2c/0x110 [ 36.438071] do_vmi_align_munmap+0x2ba/0x11f0 [ 36.438622] ? lock_is_held_type+0x9f/0x120 [ 36.439146] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 36.439744] ? mtree_range_walk+0x632/0x900 [ 36.440287] ? mas_walk+0x5c7/0x7c0 [ 36.440777] do_vmi_munmap+0x1f1/0x2b0 [ 36.441260] mmap_region+0x1f9/0x2660 [ 36.441738] ? vm_mmap_pgoff+0x15c/0x3a0 [ 36.442220] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 36.442895] ? __pfx_lock_acquire+0x10/0x10 [ 36.443400] ? __pfx_mmap_region+0x10/0x10 [ 36.443896] ? security_mmap_addr+0x7d/0xa0 [ 36.444406] ? get_unmapped_area+0x1f5/0x3f0 [ 36.444938] do_mmap+0x854/0xf00 [ 36.445357] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.445821] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 36.446351] ksys_mmap_pgoff+0x3af/0x500 [ 36.446830] do_syscall_64+0x3f/0x90 [ 36.447285] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.447906] RIP: 0033:0x7fab117cad82 [ 36.448338] 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 [ 36.450364] RSP: 002b:00007fff90dc4be8 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 36.451209] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007fab117cad82 [ 36.452017] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007fab10c04000 [ 36.452868] RBP: 00007fab10c04000 R08: 0000000000000009 R09: 0000000000001000 [ 36.453712] R10: 0000000000000812 R11: 0000000000000206 R12: 000055d47a4a0ec0 [ 36.454502] R13: 00007fff90dc4c00 R14: 00007fff90dc4c30 R15: 00007fff90dc4f90 [ 36.455313] [ 36.455589] [ 36.455793] Allocated by task 212: [ 36.456197] kasan_save_stack+0x22/0x50 [ 36.456674] kasan_set_track+0x25/0x30 [ 36.457158] __kasan_slab_alloc+0x59/0x70 [ 36.457652] kmem_cache_alloc+0x16b/0x370 [ 36.458145] vm_area_dup+0x20/0x160 [ 36.458571] __split_vma+0x170/0x950 [ 36.459017] split_vma+0xc6/0x110 [ 36.459454] mprotect_fixup+0x8d2/0xb30 [ 36.459941] do_mprotect_pkey+0x87e/0xd40 [ 36.460461] __x64_sys_mprotect+0x78/0xc0 [ 36.460988] do_syscall_64+0x3f/0x90 [ 36.461447] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.462056] [ 36.462261] Freed by task 212: [ 36.462642] kasan_save_stack+0x22/0x50 [ 36.463120] kasan_set_track+0x25/0x30 [ 36.463583] kasan_save_free_info+0x2b/0x50 [ 36.464086] __kasan_slab_free+0x10a/0x190 [ 36.464591] kmem_cache_free+0x10d/0x4d0 [ 36.465083] rcu_core+0x8c8/0x2860 [ 36.465502] __do_softirq+0x1b7/0x7d4 [ 36.465948] [ 36.466153] Last potentially related work creation: [ 36.466699] kasan_save_stack+0x22/0x50 [ 36.467178] __kasan_record_aux_stack+0x8e/0xa0 [ 36.467716] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.468317] remove_vma+0x139/0x170 [ 36.468759] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.469281] do_vmi_munmap+0x1f1/0x2b0 [ 36.469740] __vm_munmap+0x138/0x3a0 [ 36.470188] __x64_sys_munmap+0x59/0x80 [ 36.470654] do_syscall_64+0x3f/0x90 [ 36.471099] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.471779] [ 36.471985] Second to last potentially related work creation: [ 36.472631] kasan_save_stack+0x22/0x50 [ 36.473110] __kasan_record_aux_stack+0x8e/0xa0 [ 36.473649] __call_rcu_common.constprop.0+0x6a/0xb90 [ 36.474251] remove_vma+0x139/0x170 [ 36.474674] do_vmi_align_munmap+0xd4a/0x11f0 [ 36.475208] do_vmi_munmap+0x1f1/0x2b0 [ 36.475679] mmap_region+0x1f9/0x2660 [ 36.476134] do_mmap+0x854/0xf00 [ 36.476554] vm_mmap_pgoff+0x1a6/0x3a0 [ 36.477038] ksys_mmap_pgoff+0x3af/0x500 [ 36.477525] do_syscall_64+0x3f/0x90 [ 36.477983] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 36.478609] [ 36.478822] The buggy address belongs to the object at ffff88800e12ae80 [ 36.478822] which belongs to the cache vm_area_struct of size 168 [ 36.480255] The buggy address is located 88 bytes inside of [ 36.480255] freed 168-byte region [ffff88800e12ae80, ffff88800e12af28) [ 36.481661] [ 36.481871] The buggy address belongs to the physical page: [ 36.482511] page:0000000093134ed6 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0xe12a [ 36.483568] memcg:ffff88800d5d5401 [ 36.483987] flags: 0x100000000000200(slab|node=0|zone=1) [ 36.484618] page_type: 0xffffffff() [ 36.485061] raw: 0100000000000200 ffff8880087a0c80 ffffea00003aad80 dead000000000002 [ 36.485964] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800d5d5401 [ 36.486869] page dumped because: kasan: bad access detected [ 36.487500] [ 36.487709] Memory state around the buggy address: [ 36.488279] ffff88800e12ad80: fc fc fc fa fb fb fb fb fb fb fb fb fb fb fb fb [ 36.489143] ffff88800e12ae00: fb fb fb fb fb fb fb fb fc fc fc fc fc fc fc fc [ 36.489975] >ffff88800e12ae80: fa fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 36.490817] ^ [ 36.491540] ffff88800e12af00: fb fb fb fb fb fc fc fc fc fc fc fc fc fc fc fc [ 36.492391] ffff88800e12af80: fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc fc [ 36.493246] ================================================================== [ 36.494258] Disabling lock debugging due to kernel taint [ 38.358134] BUG: Bad rss-counter state mm:00000000183019be type:MM_FILEPAGES val:33 [ 38.358925] BUG: Bad rss-counter state mm:00000000183019be type:MM_ANONPAGES val:22 [ 38.815046] BUG: Bad rss-counter state mm:00000000066fc05e type:MM_FILEPAGES val:33 [ 38.815970] BUG: Bad rss-counter state mm:00000000066fc05e type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:26271' (ECDSA) to the list of known hosts. 2023/06/20 15:48:04 fuzzer started 2023/06/20 15:48:05 dialing manager at localhost:36067 2023/06/20 15:48:05 checking machine... 2023/06/20 15:48:05 checking revisions... [ 39.517704] kmemleak: Automatic memory scanning thread ended 2023/06/20 15:48:05 testing simple program... [ 39.565414] cgroup: Unknown subsys name 'net' [ 39.616888] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:48:04 Registers: info registers vcpu 0 RAX=0000000000000004 RBX=0000000000000001 RCX=dffffc0000000000 RDX=0000000000000001 RSI=ffffffff844a5108 RDI=ffffffff84e3a5a1 RBP=ffff88800b8a1808 RSP=ffff88801a1cfce8 R8 =0000000000000005 R9 =0000000000000003 R10=0000000000000001 R11=0000000000000000 R12=0000000000000002 R13=ffff88801602a540 R14=00007f3dc63c5000 R15=00007f3dc6420fff RIP=ffffffff844a512f 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 =0000 0000000000000000 00000000 00000000 DS =0000 0000000000000000 00000000 00000000 FS =0000 00007f3dc5e61900 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=00007f3dc6418618 CR3=0000000016e50000 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=ffffffff8451250e RDX=ffffed100d9e6a01 RSI=0000000000000004 RDI=ffffffff81288ac5 RBP=dffffc0000000000 RSP=ffff888008e07e70 R8 =0000000000000000 R9 =ffffed100d9e6a00 R10=ffff88806cf35003 R11=0000000000000001 R12=ffffffff85d3d350 R13=1ffff110011c0fd3 R14=0000000000000000 R15=0000000000000000 RIP=ffffffff8451349f 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=00007fcece2277f0 CR3=000000000ef9a000 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=119a790f944f10b3c3430732721be3ce XMM02=000000000011b1e0ec2efd57dc4c00df XMM03=0000000000121ba0e59460cd2ed37289 XMM04=119d526b36bf518400000000000ae988 XMM05=dfcdbad4f1609c370000000000132b08 XMM06=806171799158d9670000000000132990 XMM07=e042d86d42eb936e0000000000121e78 XMM08=e59460cd2ed37289000000000011b240 XMM09=00000000000000000000000000000000 XMM10=20200000000020202020202020200000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000