[ 24.303036] BUG: Bad rss-counter state mm:000000006e9755fb type:MM_FILEPAGES val:33 [ 24.304308] BUG: Bad rss-counter state mm:000000006e9755fb type:MM_ANONPAGES val:22 [ 24.440922] ================================================================== [ 24.442087] BUG: KASAN: slab-use-after-free in vma_interval_tree_remove+0xc75/0xec0 [ 24.443110] Read of size 8 at addr ffff8880095ec5c8 by task sshd/220 [ 24.444047] [ 24.444287] CPU: 0 PID: 220 Comm: sshd Not tainted 6.4.0-rc7-next-20230619 #1 [ 24.445204] Hardware name: QEMU Standard PC (i440FX + PIIX, 1996), BIOS 1.12.0-1 04/01/2014 [ 24.446327] Call Trace: [ 24.446671] [ 24.446980] dump_stack_lvl+0x91/0xf0 [ 24.447500] print_report+0xcc/0x620 [ 24.448010] ? __virt_addr_valid+0x102/0x340 [ 24.448585] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.449243] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.449935] kasan_report+0xbe/0xf0 [ 24.450438] ? vma_interval_tree_remove+0xc75/0xec0 [ 24.451095] vma_interval_tree_remove+0xc75/0xec0 [ 24.451742] vma_prepare+0xc54/0x11a0 [ 24.452268] __split_vma+0x5af/0x950 [ 24.452777] ? __pfx___split_vma+0x10/0x10 [ 24.453333] ? find_held_lock+0x2c/0x110 [ 24.453900] do_vmi_align_munmap+0x2ba/0x11f0 [ 24.454487] ? lock_is_held_type+0x9f/0x120 [ 24.455053] ? __pfx_do_vmi_align_munmap+0x10/0x10 [ 24.455695] ? mtree_range_walk+0x632/0x900 [ 24.456281] ? mas_walk+0x5c7/0x7c0 [ 24.456790] do_vmi_munmap+0x1f1/0x2b0 [ 24.457313] mmap_region+0x1f9/0x2660 [ 24.457847] ? vm_mmap_pgoff+0x15c/0x3a0 [ 24.458394] ? __pfx_arch_get_unmapped_area_topdown+0x10/0x10 [ 24.459159] ? __pfx_lock_acquire+0x10/0x10 [ 24.459727] ? __pfx_mmap_region+0x10/0x10 [ 24.460282] ? security_mmap_addr+0x7d/0xa0 [ 24.460850] ? get_unmapped_area+0x1f5/0x3f0 [ 24.461444] do_mmap+0x854/0xf00 [ 24.461951] vm_mmap_pgoff+0x1a6/0x3a0 [ 24.462476] ? __pfx_vm_mmap_pgoff+0x10/0x10 [ 24.463094] ksys_mmap_pgoff+0x3af/0x500 [ 24.463623] do_syscall_64+0x3f/0x90 [ 24.464134] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.464819] RIP: 0033:0x7f9ff1a11d82 [ 24.465303] 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 [ 24.467571] RSP: 002b:00007ffdfca8bc88 EFLAGS: 00000206 ORIG_RAX: 0000000000000009 [ 24.468518] RAX: ffffffffffffffda RBX: 0000000000000812 RCX: 00007f9ff1a11d82 [ 24.469401] RDX: 0000000000000005 RSI: 0000000000001000 RDI: 00007f9ff0e4b000 [ 24.470323] RBP: 00007f9ff0e4b000 R08: 0000000000000009 R09: 0000000000001000 [ 24.471227] R10: 0000000000000812 R11: 0000000000000206 R12: 000055f56a5ebec0 [ 24.472121] R13: 00007ffdfca8bca0 R14: 00007ffdfca8bcd0 R15: 00007ffdfca8c030 [ 24.473041] [ 24.473357] [ 24.473606] Allocated by task 213: [ 24.474063] kasan_save_stack+0x22/0x50 [ 24.474613] kasan_set_track+0x25/0x30 [ 24.475128] __kasan_slab_alloc+0x59/0x70 [ 24.475676] kmem_cache_alloc+0x16b/0x370 [ 24.476231] vm_area_dup+0x20/0x160 [ 24.476712] __split_vma+0x170/0x950 [ 24.477196] split_vma+0xc6/0x110 [ 24.477661] mprotect_fixup+0x8d2/0xb30 [ 24.478183] do_mprotect_pkey+0x87e/0xd40 [ 24.478722] __x64_sys_mprotect+0x78/0xc0 [ 24.479262] do_syscall_64+0x3f/0x90 [ 24.479760] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.480437] [ 24.480668] Freed by task 213: [ 24.481086] kasan_save_stack+0x22/0x50 [ 24.481653] kasan_set_track+0x25/0x30 [ 24.482185] kasan_save_free_info+0x2b/0x50 [ 24.482770] __kasan_slab_free+0x10a/0x190 [ 24.483344] kmem_cache_free+0x10d/0x4d0 [ 24.483885] rcu_core+0x8c8/0x2860 [ 24.484353] __do_softirq+0x1b7/0x7d4 [ 24.484850] [ 24.485075] Last potentially related work creation: [ 24.485703] kasan_save_stack+0x22/0x50 [ 24.486227] __kasan_record_aux_stack+0x8e/0xa0 [ 24.486840] __call_rcu_common.constprop.0+0x6a/0xb90 [ 24.487530] remove_vma+0x139/0x170 [ 24.488011] do_vmi_align_munmap+0xd4a/0x11f0 [ 24.488591] do_vmi_munmap+0x1f1/0x2b0 [ 24.489098] __vm_munmap+0x138/0x3a0 [ 24.489615] __x64_sys_munmap+0x59/0x80 [ 24.490137] do_syscall_64+0x3f/0x90 [ 24.490636] entry_SYSCALL_64_after_hwframe+0x6e/0xd8 [ 24.491320] [ 24.491549] The buggy address belongs to the object at ffff8880095ec570 [ 24.491549] which belongs to the cache vm_area_struct of size 168 [ 24.493112] The buggy address is located 88 bytes inside of [ 24.493112] freed 168-byte region [ffff8880095ec570, ffff8880095ec618) [ 24.494659] [ 24.494887] The buggy address belongs to the physical page: [ 24.495575] page:00000000b08d1f20 refcount:1 mapcount:0 mapping:0000000000000000 index:0x0 pfn:0x95ec [ 24.496701] memcg:ffff88800ca9cf01 [ 24.497148] flags: 0x100000000000200(slab|node=0|zone=1) [ 24.497844] page_type: 0xffffffff() [ 24.498320] raw: 0100000000000200 ffff88800879fc80 ffffea000034a0c0 000000000000000a [ 24.499304] raw: 0000000000000000 0000000000110011 00000001ffffffff ffff88800ca9cf01 [ 24.500263] page dumped because: kasan: bad access detected [ 24.500954] [ 24.501186] Memory state around the buggy address: [ 24.501821] ffff8880095ec480: fc 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.502744] ffff8880095ec500: 00 00 00 00 00 00 fc fc fc fc fc fc fc fc fa fb [ 24.503654] >ffff8880095ec580: fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb fb [ 24.504565] ^ [ 24.505268] ffff8880095ec600: fb fb fb fc fc fc fc fc fc fc fc 00 00 00 00 00 [ 24.506191] ffff8880095ec680: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 [ 24.507081] ================================================================== [ 24.508100] Disabling lock debugging due to kernel taint Debian GNU/Linux 11 syzkaller ttyS0 syzkaller login: [ 26.070943] BUG: Bad rss-counter state mm:00000000aa1909d7 type:MM_FILEPAGES val:33 [ 26.071715] BUG: Bad rss-counter state mm:00000000aa1909d7 type:MM_ANONPAGES val:22 [ 26.575594] BUG: Bad rss-counter state mm:00000000e5bacdb8 type:MM_FILEPAGES val:33 [ 26.576775] BUG: Bad rss-counter state mm:00000000e5bacdb8 type:MM_ANONPAGES val:22 Warning: Permanently added '[localhost]:28564' (ECDSA) to the list of known hosts. 2023/06/19 15:44:55 fuzzer started 2023/06/19 15:44:56 dialing manager at localhost:44161 2023/06/19 15:44:56 checking machine... 2023/06/19 15:44:56 checking revisions... [ 27.262575] kmemleak: Automatic memory scanning thread ended 2023/06/19 15:44:56 testing simple program... [ 27.314363] cgroup: Unknown subsys name 'net' [ 27.361432] cgroup: Unknown subsys name 'rlimit' executing program executing program executing program VM DIAGNOSIS: 15:44:55 Registers: info registers vcpu 0 RAX=ffff88806ce35000 RBX=0000000000000000 RCX=ffffffff8450c50e RDX=ffffed100d9c6a01 RSI=0000000000000004 RDI=ffffffff812889a5 RBP=dffffc0000000000 RSP=ffffffff85407e10 R8 =0000000000000000 R9 =ffffed100d9c6a00 R10=ffff88806ce35003 R11=ffff888008c58000 R12=ffffffff85d3bed0 R13=1ffffffff0a80fc7 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 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=00007ffdb5bf7b28 CR3=0000000009faa000 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=2035353a34343a3531203931206e754a XMM01=73732878696e755f6d6170203a5d3932 XMM02=65736f6c63206e6f6973736573203a29 XMM03=755f6d6170203a5d3932325b64687373 XMM04=69662068637573206f4e203a656c6163 XMM05=3a656c696620766e65206e65706f206f XMM06=65733a6468737328766e655f6d617020 XMM07=6b7a79732035353a34343a3531203931 XMM08=3d656e696c646d632022656369767265 XMM09=00000000000000000000000000000000 XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000 XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000 XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000 info registers vcpu 1 RAX=ffffffff8379828a RBX=ffffffff813ad420 RCX=0000000000000001 RDX=1ffff1100d9e1359 RSI=ffffffff8379828a RDI=ffff88806cf09b38 RBP=ffff88806cf09b08 RSP=ffff88806cf09a68 R8 =0000000000000001 R9 =ffff88806cf09ab0 R10=0000000000038001 R11=0000000000038922 R12=ffff88806cf09b38 R13=0000000000000000 R14=ffff888015d5d1c0 R15=ffff888016e29280 RIP=ffffffff813ad424 RFL=00000282 [--S----] 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 00007f8223365900 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=00007f822391c618 CR3=000000000e51a000 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=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