__mmput+0x122/0x4b0 kernel/fork.c:1115 mmput+0x58/0x60 kernel/fork.c:1136 exit_mm kernel/exit.c:501 [inline] do_exit+0xabc/0x2a30 kernel/exit.c:812 do_group_exit+0x125/0x310 kernel/exit.c:922 __do_sys_exit_group kernel/exit.c:933 [inline] __se_sys_exit_group kernel/exit.c:931 [inline] __x64_sys_exit_group+0x3a/0x50 kernel/exit.c:931 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae ------------[ cut here ]------------ kernel BUG at include/linux/page-flags.h:660! invalid opcode: 0000 [#1] PREEMPT SMP KASAN CPU: 0 PID: 28234 Comm: syz-executor.5 Not tainted 5.15.0-rc7-syzkaller #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 01/01/2011 RIP: 0010:PageDoubleMap include/linux/page-flags.h:660 [inline] RIP: 0010:__page_mapcount+0x2d2/0x350 mm/util.c:747 Code: e8 53 bd d0 ff 48 c7 c6 c0 a0 95 89 48 89 ef e8 e4 5e 04 00 0f 0b e8 3d bd d0 ff 48 c7 c6 20 a1 95 89 48 89 ef e8 ce 5e 04 00 <0f> 0b e8 27 bd d0 ff 48 c7 c6 60 a1 95 89 4c 89 f7 e8 b8 5e 04 00 RSP: 0018:ffffc90002c27568 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90010207000 RDX: 0000000000040000 RSI: ffffffff81a56662 RDI: 0000000000000003 RBP: ffffea0000f19080 R08: 0000000000000029 R09: 00000000ffffffff R10: ffffffff88f5d8f8 R11: 00000000ffffffff R12: 00000000ffffffff R13: 00000000ffffea00 R14: ffffc90002c27938 R15: ffffea0000f18001 FS: 00007f315794b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bd24000 CR3: 000000007cf5a000 CR4: 00000000003506f0 DR0: 0001000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600 Call Trace: page_mapcount include/linux/mm.h:876 [inline] smaps_account+0x538/0x9f0 fs/proc/task_mmu.c:467 smaps_pte_entry fs/proc/task_mmu.c:531 [inline] smaps_pte_range+0x60d/0x1390 fs/proc/task_mmu.c:594 walk_pmd_range mm/pagewalk.c:128 [inline] walk_pud_range mm/pagewalk.c:205 [inline] walk_p4d_range mm/pagewalk.c:240 [inline] walk_pgd_range mm/pagewalk.c:277 [inline] __walk_page_range+0xe23/0x1ea0 mm/pagewalk.c:379 walk_page_vma+0x277/0x350 mm/pagewalk.c:530 smap_gather_stats.part.0+0x1e1/0x2d0 fs/proc/task_mmu.c:764 smap_gather_stats fs/proc/task_mmu.c:734 [inline] show_smaps_rollup+0x325/0x9c0 fs/proc/task_mmu.c:867 seq_read_iter+0x4f6/0x1240 fs/seq_file.c:230 seq_read+0x3e0/0x5b0 fs/seq_file.c:162 do_loop_readv_writev fs/read_write.c:750 [inline] do_loop_readv_writev fs/read_write.c:737 [inline] do_iter_read+0x501/0x760 fs/read_write.c:792 vfs_readv+0xe5/0x150 fs/read_write.c:910 do_preadv fs/read_write.c:1002 [inline] __do_sys_preadv fs/read_write.c:1052 [inline] __se_sys_preadv fs/read_write.c:1047 [inline] __x64_sys_preadv+0x231/0x310 fs/read_write.c:1047 do_syscall_x64 arch/x86/entry/common.c:50 [inline] do_syscall_64+0x35/0xb0 arch/x86/entry/common.c:80 entry_SYSCALL_64_after_hwframe+0x44/0xae RIP: 0033:0x7f315a3f6a39 Code: ff ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 40 00 48 89 f8 48 89 f7 48 89 d6 48 89 ca 4d 89 c2 4d 89 c8 4c 8b 4c 24 08 0f 05 <48> 3d 01 f0 ff ff 73 01 c3 48 c7 c1 bc ff ff ff f7 d8 64 89 01 48 RSP: 002b:00007f315794b188 EFLAGS: 00000246 ORIG_RAX: 0000000000000127 RAX: ffffffffffffffda RBX: 00007f315a4fa020 RCX: 00007f315a3f6a39 RDX: 0000000000000001 RSI: 0000000020000140 RDI: 0000000000000004 RBP: 00007f315a450e8f R08: 0000000000000000 R09: 0000000000000000 R10: 0000000000000000 R11: 0000000000000246 R12: 0000000000000000 R13: 00007ffc74df735f R14: 00007f315794b300 R15: 0000000000022000 Modules linked in: ---[ end trace 8a9f84f210b7c4d1 ]--- RIP: 0010:PageDoubleMap include/linux/page-flags.h:660 [inline] RIP: 0010:__page_mapcount+0x2d2/0x350 mm/util.c:747 Code: e8 53 bd d0 ff 48 c7 c6 c0 a0 95 89 48 89 ef e8 e4 5e 04 00 0f 0b e8 3d bd d0 ff 48 c7 c6 20 a1 95 89 48 89 ef e8 ce 5e 04 00 <0f> 0b e8 27 bd d0 ff 48 c7 c6 60 a1 95 89 4c 89 f7 e8 b8 5e 04 00 RSP: 0018:ffffc90002c27568 EFLAGS: 00010246 RAX: 0000000000040000 RBX: 0000000000000000 RCX: ffffc90010207000 RDX: 0000000000040000 RSI: ffffffff81a56662 RDI: 0000000000000003 RBP: ffffea0000f19080 R08: 0000000000000029 R09: 00000000ffffffff R10: ffffffff88f5d8f8 R11: 00000000ffffffff R12: 00000000ffffffff R13: 00000000ffffea00 R14: ffffc90002c27938 R15: ffffea0000f18001 FS: 00007f315794b700(0000) GS:ffff8880b9c00000(0000) knlGS:0000000000000000 CS: 0010 DS: 0000 ES: 0000 CR0: 0000000080050033 CR2: 0000001b2bd24000 CR3: 000000007cf5a000 CR4: 00000000003506f0 DR0: 0001000000000000 DR1: 0000000000000000 DR2: 0000000000000000 DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000600