------------[ cut here ]------------ WARNING: CPU: 1 PID: 5268 at mm/mmap.c:965 vma_merge+0x170/0x818 mm/mmap.c:965 Modules linked in: Kernel panic - not syncing: kernel: panic_on_warn set ... CPU: 1 PID: 5268 Comm: syz-executor.0 Not tainted 6.4.0-rc2-syzkaller #0 Hardware name: ARM-Versatile Express Backtrace: [<817d8de4>] (dump_backtrace) from [<817d8ed8>] (show_stack+0x18/0x1c arch/arm/kernel/traps.c:256) r7:00000000 r6:826229c4 r5:60000093 r4:81f9d3a4 [<817d8ec0>] (show_stack) from [<817f59b0>] (__dump_stack lib/dump_stack.c:88 [inline]) [<817d8ec0>] (show_stack) from [<817f59b0>] (dump_stack_lvl+0x48/0x54 lib/dump_stack.c:106) [<817f5968>] (dump_stack_lvl) from [<817f59d4>] (dump_stack+0x18/0x1c lib/dump_stack.c:113) r5:00000000 r4:82850d14 [<817f59bc>] (dump_stack) from [<817d99d0>] (panic+0x120/0x370 kernel/panic.c:340) [<817d98b0>] (panic) from [<80241fe8>] (print_tainted+0x0/0xa0 kernel/panic.c:236) r3:8260c488 r2:00000001 r1:81f86498 r0:81f8dea8 r7:80465838 [<80241f64>] (check_panic_on_warn) from [<802421dc>] (__warn+0x7c/0x180 kernel/panic.c:673) [<80242160>] (__warn) from [<802423b8>] (warn_slowpath_fmt+0xd8/0x1d8 kernel/panic.c:697) r8:00000009 r7:000003c5 r6:81fb2224 r5:8260c964 r4:824adf7c [<802422e4>] (warn_slowpath_fmt) from [<80465838>] (vma_merge+0x170/0x818 mm/mmap.c:965) r10:00000000 r9:00000000 r8:859f6500 r7:200e2000 r6:85c93108 r5:00000000 r4:85e82160 [<804656c8>] (vma_merge) from [<80531ca4>] (userfaultfd_register fs/userfaultfd.c:1485 [inline]) [<804656c8>] (vma_merge) from [<80531ca4>] (userfaultfd_ioctl+0x1268/0x1534 fs/userfaultfd.c:2050) r10:20ce2000 r9:85c93108 r8:200e2000 r7:85e82160 r6:00100277 r5:86187000 r4:eae61eb8 [<80530a3c>] (userfaultfd_ioctl) from [<804e5584>] (vfs_ioctl fs/ioctl.c:51 [inline]) [<80530a3c>] (userfaultfd_ioctl) from [<804e5584>] (do_vfs_ioctl fs/ioctl.c:830 [inline]) [<80530a3c>] (userfaultfd_ioctl) from [<804e5584>] (__do_sys_ioctl fs/ioctl.c:868 [inline]) [<80530a3c>] (userfaultfd_ioctl) from [<804e5584>] (sys_ioctl+0x110/0xa74 fs/ioctl.c:856) r10:853aa000 r9:00000003 r8:85fa5540 r7:20000100 r6:85fa5541 r5:00000000 r4:c020aa00 [<804e5474>] (sys_ioctl) from [<80200060>] (ret_fast_syscall+0x0/0x1c arch/arm/mm/proc-v7.S:66) Exception stack(0xeae61fa8 to 0xeae61ff0) 1fa0: 00000000 00000000 00000003 c020aa00 20000100 00000000 1fc0: 00000000 00000000 0014c2b8 00000036 7eb9d3c2 76b636d0 7eb9d534 76b6320c 1fe0: 76b63020 76b63010 00017004 0004dfb0 r10:00000036 r9:83270000 r8:80200288 r7:00000036 r6:0014c2b8 r5:00000000 r4:00000000 Rebooting in 86400 seconds..